TMP03FT9Z [ADI]
Serial Digital Output Thermometers; 串行数字输出温度计
| 型号： | TMP03FT9Z |
| 厂家： | 
ADI |
| 描述： | Serial Digital Output Thermometers |
| 文件： | 总16页 (文件大小：220K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
a
Serial Digital Output Thermometers
TMP03/TMP04
FUNCTIONAL BLOCK DIAGRAM
FEATURES
Low Cost 3-Pin Package
Modulated Serial Digital Output
Proportional to Temperature
TMP03/TMP04
TEMPERATURE
SENSOR
ꢀ1.5ꢁC Accuracy (typ) from –25ꢁC to +100ꢁC
Specified –40ꢁC to +100ꢁC, Operation to 150ꢁC
Power Consumption 6.5 mW Max at 5 V
Flexible Open-Collector Output on TMP03
CMOS/TTL-Compatible Output on TMP04
Low Voltage Operation (4.5 V to 7 V)
VPTAT
DIGITAL
MODULATOR
V
REF
APPLICATIONS
Isolated Sensors
1
2
3
D
V+
GND
OUT
Environmental Control Systems
Computer Thermal Monitoring
Thermal Protection
Industrial Process Control
Power System Monitors
PACKAGE TYPES AVAILABLE
TO-92
GENERAL DESCRIPTION
The TMP03/TMP04 are monolithic temperature detectors that
generate a modulated serial digital output that varies in direct
proportion to the temperature of the device. An onboard sensor
generates a voltage precisely proportional to absolute tempera-
ture which is compared to an internal voltage reference and
input to a precision digital modulator. The ratiometric encoding
format of the serial digital output is independent of the clock drift
errors common to most serial modulation techniques such as
voltage-to-frequency converters. Overall accuracy is 1.5°C
(typical) from –25°C to +100°C, with excellent transducer lin-
earity. The digital output of the TMP04 is CMOS/TTL
compatible, and is easily interfaced to the serial inputs of most
popular microprocessors. The open-collector output of the
TMP03 is capable of sinking 5 mA. The TMP03 is best suited
for systems requiring isolated circuits utilizing optocouplers or
isolation transformers.
TMP03/TMP04
1
2
3
V+
D
GND
OUT
BOTTOMVIEW
(Not to Scale)
SO-8 and RU-8 (TSSOP)
D
1
2
3
4
8
7
6
5
NC
NC
NC
NC
OUT
TMP03/
TMP04
V+
GND
NC
TOP VIEW
The TMP03 and TMP04 are specified for operation at supply
voltages from 4.5 V to 7 V. Operating from 5 V, supply current
(unloaded) is less than 1.3 mA.
(Not to Scale)
NC = NO CONNECT
The TMP03/TMP04 are rated for operation over the –40°C to
+100°C temperature range in the low cost TO-92, SO-8, and
TSSOP-8 surface mount packages. Operation extends to 150°C
with reduced accuracy.
(continued on page 4)
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
World Wide Web Site: http://www.analog.com
© Analog Devices, Inc., 2002
TMP03/TMP04–SPECIFICATIONS
(V+ = 5 V, –40ꢁC ≤ T ≤ 100ꢁC, unless otherwise noted.)
TMP03F
A
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
ACCURACY
Temperature Error
–25°C < TA < +100°C1
–40°C < TA < –25°C1
1.5
2.0
0.5
0.5
58.8
10
4.0
5.0
°C
°C
°C
°C
%
ms
°C/V
Temperature Linearity
Long-Term Stability
Nominal Mark-Space Ratio
Nominal T1 Pulsewidth
Power Supply Rejection Ratio
1000 Hours at 125°C
TA = 0°C
T1/T2
T1
PSRR
Over Rated Supply
TA = 25°C
0.7
1.4
OUTPUTS
Output Low Voltage
Output Low Voltage
VOL
VOL
ISINK = 1.6 mA
ISINK = 5 mA
0.2
2
V
V
0°C < TA < 100°C
Output Low Voltage
VOL
ISINK = 4 mA
2
V
–40°C < TA < 0°C
(Note 2)
See Test Load
Digital Output Capacitance
Fall Time
Device Turn-On Time
COUT
tHL
15
150
20
pF
ns
ms
POWER SUPPLY
Supply Range
Supply Current
V+
ISY
4.5
7
1.3
V
mA
Unloaded
0.9
NOTES
1Maximum deviation from output transfer function over specified temperature range.
2Guaranteed but not tested.
Specifications subject to change without notice.
Test Load
10 kΩ to 5 V Supply, 100 pF to Ground
TMP04F (V+ = 5 V, –40ꢁC ≤ TA ≤ 100ꢁC, unless otherwise noted.)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
ACCURACY
Temperature Error
TA = 25°C
1.0
1.5
2.0
0.5
0.5
58.8
10
3.0
4.0
5.0
°C
°C
°C
°C
°C
%
–25°C < TA < +100°C1
–40°C < TA < –25°C1
Temperature Linearity
Long-Term Stability
Nominal Mark-Space Ratio
Nominal T1 Pulsewidth
Power Supply Rejection Ratio
1000 Hours at 125°C
TA = 0°C
T1/T2
T1
ms
°C/V
PSRR
Over Rated Supply
TA = 25°C
0.7
1.2
0.4
OUTPUTS
Output High Voltage
Output Low Voltage
Digital Output Capacitance
Fall Time
VOH
VOL
COUT
tHL
IOH = 800 µA
IOL = 800 µA
(Note 2)
See Test Load
See Test Load
V+ –0.4
V
V
pF
ns
ns
ms
15
200
160
20
Rise Time
Device Turn-On Time
tLH
POWER SUPPLY
Supply Range
Supply Current
V+
ISY
4.5
7
1.3
V
mA
Unloaded
0.9
NOTES
1Maximum deviation from output transfer function over specified temperature range.
2Guaranteed but not tested.
Specifications subject to change without notice.
Test Load
100 pF to Ground
–2–
REV. A
TMP03/TMP04
ABSOLUTE MAXIMUM RATINGS*
ORDERING GUIDE
Maximum Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . 9 V
Accuracy
at 25ꢁC
Temperature
Range
Maximum Output Current (TMP03 DOUT
Maximum Output Current (TMP04 DOUT
)
)
. . . . . . . . . 50 mA
. . . . . . . . . 10 mA
Model
Package
TMP03FT9
TMP03FS
TMP03FRU
TMP04FT9
TMP04FS
3.0
3.0
3.0
3.0
3.0
XIND
XIND
XIND
XIND
XIND
TO-92
SO-8
TSSOP-8
TO-92
SO-8
Maximum Open-Collector Output Voltage (TMP03) . . . 18 V
Operating Temperature Range . . . . . . . . . . –55°C to +150°C
Dice Junction Temperature . . . . . . . . . . . . . . . . . . . . . . 175°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +160°C
Lead Temperature (Soldering, 60 sec) . . . . . . . . . . . . . 300°C
*CAUTION
1Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation at or
above this specification is not implied. Exposure to the above maximum rating
conditions for extended periods may affect device reliability.
2Digital inputs and outputs are protected, however, permanent damage may occur
on unprotected units from high-energy electrostatic fields. Keep units in conduc-
tive foam or packaging at all times until ready to use. Use proper antistatic
handling procedures.
3Remove power before inserting or removing units from their sockets.
Package Type
ꢂJA
ꢂJC
Units
TO-92 (T9)
SO-8 (S)
TSSOP (RU)
1621
1581
2401
120
43
43
°C/W
°C/W
°C/W
NOTE
1ΘJA is specified for device in socket (worst case conditions).
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the TMP03 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high-energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
REV. A
–3–
TMP03/TMP04
(continued from page 1)
avoids major error sources common to other modulation tech-
niques, as it is clock-independent.
The TMP03 is a powerful, complete temperature measurement
system with digital output, on a single chip. The onboard tem-
perature sensor follows in the footsteps of the TMP01 low
power programmable temperature controller, offering excellent
accuracy and linearity over the entire rated temperature range
without correction or calibration by the user.
Output Encoding
Accurate sampling of an analog signal requires precise spacing
of the sampling interval in order to maintain an accurate repre-
sentation of the signal in the time domain. This dictates a
master clock between the digitizer and the signal processor. In
the case of compact, cost-effective data acquisition systems, the
addition of a buffered, high speed clock line can represent a
significant burden on the overall system design. Alternatively,
the addition of an onboard clock circuit with the appropriate
accuracy and drift performance to an integrated circuit can add
significant cost. The modulation and encoding techniques uti-
lized in the TMP03 avoid this problem and allow the overall
circuit to fit into a compact, 3-pin package. To achieve this, a
simple, compact onboard clock and an oversampling digitizer
that is insensitive to sampling rate variations are used. Most
importantly, the digitized signal is encoded into a ratiometric
format in which the exact frequency of the TMP03’s clock is
irrelevant, and the effects of clock variations are effectively can-
celed upon decoding by the digital filter.
The sensor output is digitized by a first-order sigma-delta
modulator, also known as the “charge balance” type analog-to-
digital converter. (See Figure 1.) This type of converter utilizes
time-domain oversampling and a high accuracy comparator to
deliver 12 bits of effective accuracy in an extremely compact
circuit.
⌺⌬ MODULATOR
INTEGRATOR
COMPARATOR
VOLTAGE REF
AND VPTAT
1-BIT
DAC
The output of the TMP03 is a square wave with a nominal
frequency of 35 Hz ( 20%) at 25°C. The output format is
readily decoded by the user as follows:
TMP03/04
CLOCK
GENERATOR
DIGITAL
FILTER
OUT
(SINGLE-BIT)
T2
T1
Figure 1. TMP03 Block Diagram Showing First-Order
Sigma-Delta Modulator
Basically, the sigma-delta modulator consists of an input sampler, a
summing network, an integrator, a comparator, and a 1-bit
DAC. Similar to the voltage-to-frequency converter, this
architecture creates in effect a negative feedback loop whose
intent is to minimize the integrator output by changing the duty
cycle of the comparator output in response to input voltage
changes. The comparator samples the output of the integrator at
a much higher rate than the input sampling frequency, called
oversampling. This spreads the quantization noise over a much
wider band than that of the input signal, improving overall noise
performance and increasing accuracy.
Figure 2. TMP03 Output Format
400 ×T1
235 −
455 −
Temperature (°C) =
Temperature (°F) =
T2
720 ×T1
T2
The time periods T1 (high period) and T2 (low period) are
values easily read by a microprocessor timer/counter port, with
the above calculations performed in software. Since both peri-
ods are obtained consecutively, using the same clock,
performing the division indicated in the above formulas results
in a ratiometric value that is independent of the exact frequency
of, or drift in, either the originating clock of the TMP03 or the
user’s counting clock.
The modulated output of the comparator is encoded using a
circuit technique
which results in a serial digi-
tal signal with a mark-space ratio format that is easily decoded
by any microprocessor into either degrees centigrade or degrees
Fahrenheit values, and readily transmitted or modulated over a
single wire. Most importantly, this encoding method neatly
–4–
REV. A
TMP03/TMP04
Table I. Counter Size and Clock Frequency Effects on Quantization Error
Maximum
Count Available Temp Required
Maximum
Maximum
Frequency
Quantization
Error (25ꢁC)
Quantization
Error (77ꢁF)
4096
8192
16384
125°C
125°C
125°C
94 kHz
188 kHz
376 kHz
0.284°C
0.142°C
0.071°C
0.512°F
0.256°F
0.128°F
Optimizing Counter Characteristics
with no load. In the TO-92 package mounted in free air, this
accounts for a temperature increase due to self-heating of
Counter resolution, clock rate, and the resultant temperature
decode error that occurs using a counter scheme may be deter-
mined from the following calculations:
∆T = PDISS × θJA = 4.5 mW × 162°C/W = 0.73°C (1.3°F)
For a free-standing surface-mount TSSOP package, the tem-
perature increase due to self-heating would be
1. T1 is nominally 10 ms, and compared to T2 is relatively
insensitive to temperature changes. A useful worst-case
assumption is that T1 will never exceed 12 ms over the
specified temperature range.
∆T = PDISS × θJA = 4.5 mW × 240°C/W = 1.08°C (1.9°F)
In addition, power is dissipated by the digital output which is
capable of sinking 800 µA continuous (TMP04). Under full
load, the output may dissipate
T1 max = 12 ms
Substituting this value for T1 in the formula, temperature
(°C) = 235 – ([T1/T2] × 400), yields a maximum value of
T2 of 44 ms at 125°C. Rearranging the formula allows the
maximum value of T2 to be calculated at any maximum
operating temperature:
T2
T1+T2
PDISS = 0.6V 0.8 mA
(
)(
)
For example, with T2 = 20 ms and T1 = 10 ms, the power
dissipation due to the digital output is approximately 0.32 mW
with a 0.8 mA load. In a free-standing TSSOP package, this
accounts for a temperature increase due to output self-heating
of
T2 (Temp) = (T1max × 400)/(235 – Temp) in seconds
2. We now need to calculate the maximum clock frequency we
can apply to the gated counter so it will not overflow during
T2 time measurement. The maximum frequency is calculated
using:
∆T = PDISS × ΘJA = 0.32 mW × 240°C/W = 0.08°C (0.14°F)
This temperature increase adds directly to that from the quies-
cent dissipation and affects the accuracy of the TMP03 relative
to the true ambient temperature. Alternatively, when the same
package has been bonded to a large plate or other thermal mass
(effectively a large heatsink) to measure its temperature, the
total self-heating error would be reduced to approximately
Frequency (max) = Counter Size/ (T2 at maximum
temperature)
Substituting in the equation using a 12-bit counter gives,
Fmax = 4096/44 ms Ӎ 94 kHz.
3. Now we can calculate the temperature resolution, or quanti-
zation error, provided by the counter at the chosen clock
frequency and temperature of interest. Again, using a 12-bit
counter being clocked at 90 kHz (to allow for ~5% tempera-
ture over-range), the temperature resolution at 25°C is
calculated from:
∆T = PDISS × ΘJC = (4.5 mW + 0.32 mW) × 43°C/W = 0.21°C (0.37°F)
Calibration
The TMP03 and TMP04 are laser-trimmed for accuracy and
linearity during manufacture and, in most cases, no further
adjustments are required. However, some improvement in per-
formance can be gained by additional system calibration. To
perform a single-point calibration at room temperature, measure
the TMP03 output, record the actual measurement tempera-
ture, and modify the offset constant (normally 235; see the
Output Encoding section) as follows:
Quantization Error (°C) = 400 × ([Count1/Count2] –
[Count1 – 1]/[Count2 + 1])
Quantization Error (°F) = 720 × ([Count1/Count2] –
[Count1 – 1]/[Count2 + 1])
where, Count1 = T1max × Frequency, and Count2 =
T2 (Temp) × Frequency. At 25°C this gives a resolution of
better than 0.3°C. Note that the temperature resolution
calculated from these equations improves as temperature
increases. Higher temperature resolution will be obtained by
employing larger counters as shown in Table I. The internal
quantization error of the TMP03 sets a theoretical minimum
resolution of approximately 0.1°C at 25°C.
Offset Constant = 235 + (TOBSERVED – TTMP03OUTPUT
)
A more complicated 2-point calibration is also possible. This
involves measuring the TMP03 output at two temperatures,
Temp1 and Temp2, and modifying the slope constant (normally
400) as follows:
Temp2 −Temp1
Slope Constant =
Self-Heating Effects
T1@ Temp1
T2 @ Temp1
T1@ Temp2
T2 @ Temp2
−
The temperature measurement accuracy of the TMP03 may be
degraded in some applications due to self-heating. Errors intro-
duced are from the quiescent dissipation, and power dissipated
by the digital output. The magnitude of these temperature er-
rors is dependent on the thermal conductivity of the TMP03
package, the mounting technique, and effects of airflow. Static
dissipation in the TMP03 is typically 4.5 mW operating at 5 V
where T1 and T2 are the output high and output low times,
respectively.
REV. A
–5–
TMP03/TMP04–Typical Performance Characteristics
1.05
70
T
R
= 25ꢁC
A
V+ = 5V
= 10kꢃ
1.04
1.03
1.02
1.01
1.00
0.99
0.98
0.97
= 10kꢃ
LOAD
60
50
40
30
20
10
0
R
LOAD
5
4.5
5.5
6
6.5
7
7.5
–75
–25
25
75
125
175
SUPPLYVOLTAGE –Volts
TEMPERATURE – ꢁC
TPC 4. Normalized Output Frequency vs. Supply Voltage
TPC 1. Output Frequency vs. Temperature
45
40
35
30
25
20
15
10
5
SAMPLE
(T )
RUNNING:
50.0MS/s
V
R
= 5V
S
= 10kꢃ
LOAD
CH 1 +WIDTH
s
Wfm DOES NOT
CROSS REF
T
= 25 C
A
T2
V
= 5V
DD
CH 1 –WIDTH
s
Wfm DOES NOT
CROSS REF
CH 1 RISE
500ns
C
= 100pF
= 1kꢃ
LOAD
R
LOAD
CH 1 FALL
s
NOVALID EDGE
T1
TIME SCALE = 1ꢄs/DIV
0
–75
–25
25
75
125
175
TEMPERATURE – ꢁC
TPC 2. T1 and T2 Times vs. Temperature
TPC 5. TMP03 Output Rise Time at 25°C
RUNNING:
200MS/s ET
SAMPLE
(T )
RUNNING:
50.0MS/s
SAMPLE
(T )
CH 1 +WIDTH
s
Wfm DOES NOT
CROSS REF
CH 1 +WIDTH
s
Wfm DOES NOT
CROSS REF
T
V
= 125 C
A
T
V
= 25 C
= 5V
A
= 5V
DD
DD
CH 1 –WIDTH
s
Wfm DOES NOT
CROSS REF
CH 1 –WIDTH
s
Wfm DOES NOT
CROSS REF
CH 1 RISE
5380ns
CH 1 RISE
s
C
= 100pF
= 1kꢃ
C
= 100pF
= 1kꢃ
LOAD
LOAD
R
R
NOVALID EDGE
LOAD
LOAD
CH 1 FALL
s
NOVALID EDGE
CH 1 FALL
209.6ns
TIME SCALE = 250ns/DIV
TIME SCALE = 1ꢄs/DIV
TPC 3. TMP03 Output Fall Time at 25°C
TPC 6. TMP03 Output Rise Time at 125°C
–6–
REV. A
TMP03/TMP04
SAMPLE
(T )
RUNNING:
200MS/s ET
RUNNING:
200MS/s ET
SAMPLE
(T )
EDGE SLOPE
CH 1 +WIDTH
s
Wfm DOES NOT
CROSS REF
CH 1 +WIDTH
s
Wfm DOES NOT
CROSS REF
T
V
= 25 C
A
= 5V
DD
CH 1 –WIDTH
s
Wfm DOES NOT
CROSS REF
CH 1 –WIDTH
s
Wfm DOES NOT
CROSS REF
T
= 125 C
A
V
= 5V
DD
CH 1 RISE
s
NOVALID EDGE
CH 1 RISE
= 100pF
C
LOAD
110.6ns
R
= 0
LOAD
CH 1 FALL
s
CH 1 FALL
139.5ns
C
= 100pF
LOAD
NOVALID EDGE
R
= 1kꢃ
LOAD
TIME SCALE = 250ns/DIV
TIME SCALE = 250ns/DIV
TPC 7. TMP03 Output Fall Time at 125°C
TPC 10. TMP04 Output Rise Time at 25°C
SAMPLE
(T )
RUNNING:
200MS/s ET
SAMPLE
(T )
RUNNING:
200MS/s ET
CH 1 +WIDTH
s
Wfm DOES NOT
CROSS REF
CH 1 +WIDTH
s
Wfm DOES NOT
CROSS REF
T
V
= 25 C
= 5V
T
V
= 125 C
A
A
= 5V
DD
DD
CH 1 –WIDTH
s
Wfm DOES NOT
CROSS REF
CH 1 –WIDTH
s
Wfm DOES NOT
CROSS REF
CH 1 RISE
s
CH 1 RISE
149.6ns
C
= 100pF
= 0
LOAD
R
NOVALID EDGE
LOAD
C
= 100pF
CH 1 FALL
s
NOVALID EDGE
LOAD
CH 1 FALL
127.6ns
R
= 0
LOAD
TIME SCALE = 250ns/DIV
TIME SCALE = 250ns/DIV
TPC 8. TMP04 Output Fall Time at 25°C
TPC 11. TMP04 Output Rise Time at 125°C
2500
2000
1500
1000
500
RUNNING:
SAMPLE
(T )
T
V
R
= 25ꢁC
= 5V
=
A
200MS/s ET
S
LOAD
CH 1 +WIDTH
s
Wfm DOES NOT
CROSS REF
T
V
= 125 C
= 5V
A
DD
FALLTIME
RISE TIME
CH 1 –WIDTH
s
Wfm DOES NOT
CROSS REF
CH 1 RISE
s
NOVALID EDGE
C
= 100pF
LOAD
CH 1 FALL
188.0ns
R
= 0
LOAD
TIME SCALE = 250ns/DIV
0
500 1000 1500 2000 2500 3000
5000
0
3500 4000 4500
LOAD CAPACITANCE – pF
TPC 9. TMP04 Output Fall Time at 125°C
TPC 12. TMP04 Output Rise and Fall Times
vs. Capacitive Load
REV. A
–7–
TMP03/TMP04
5
4.5
4
5
START-UPVOLTAGE DEFINED AS OUTPUT READING
BEINGWITHIN ꢀ5ꢁC OF OUTPUT AT 4.5V SUPPLY
4
MAXIMUM LIMIT
3
V+ = 5V
R
= 10kꢃ
2
1
LOAD
MEASUREMENTS IN
STIRRED OIL BATH
R
= 10kꢃ
LOAD
TMP03
0
–1
–2
–3
–4
–5
TMP04
3.5
MINIMUM LIMIT
3
–75
–25
25
75
125
175
–50
–25
0
50
TEMPERATURE – ꢁC
75
100
125
25
TEMPERATURE – ꢁC
TPC 16. Start-Up Voltage vs. Temperature
TPC 13. Output Accuracy vs. Temperature
1600
1400
1200
1000
800
600
400
200
0
TYPICALVALUES
TEMP T2 T1
V+ = 5V
= 10kꢃ
R
LOAD
T
= 25ꢁC
A
ꢁC
ms ms
NO LOAD
–55
25
125
15 10
20 10
35 10
0, T2
OUTPUT
STARTS
LOW
T1
T2
0,T1
OUTPUT
STARTS
HIGH
T2
T1
V+
0
10
20
30
40
50
60
70
80
90
100
0
1
2
3
4
5
6
7
8
TIME – ms
SUPPLYVOLTAGE – Volts
TPC 14. Start-Up Response
TPC 17. Supply Current vs. Supply Voltage
1100
1050
1000
950
4
V+ = 5V
NO LOAD
V+ = 4.5VTO 7V
3.5
3
R
= 10kꢃ
LOAD
2.5
2
900
1.5
1
TMP03
850
TMP04
800
0.5
750
0
–75
–25
25
75
125
175
–75
–25
25
75
125
175
TEMPERATURE – ꢁC
TEMPERATURE – ꢁC
TPC 15. Supply Current vs. Temperature
TPC 18. Power Supply Rejection vs. Temperature
–8–
REV. A
TMP03/TMP04
1
0.5
0
20
18
16
14
V+ = 5V DC ꢀ50mV AC
= 10kꢃ
R
V
= 1V
LOAD
OL
V+ = 5V
NORMAL PSSR
12
10
8
–0.5
6
4
2
–1
10
100
1k
10k
100k
1M
10M
1
–75
–25
25
75
125
150
FREQUENCY – Hz
TEMPERATURE – ꢁC
TPC 19. Power Supply Rejection vs. Frequency
TPC 22. TMP03 Open-Collector Sink Current
vs. Temperature
400
105
100
TRANSITION FROM 100ꢁC STIRRED
V+ = 5V
350
OIL BATHTO STILL 25ꢁC AIR
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
V
= 5V
LOAD
S
300
R
= 10kꢃ
I
= 5mA
LOAD
250
200
150
100
50
ꢅ
ꢅ
~ 23 SEC (SOIC, NO SOCKET)
~ 40 SEC (TO –92, NO SOCKET)
TO –92
I
= 1mA
LOAD
I
= 0.5mA
SOIC
LOAD
0
0
25 50 75 100 125 150 175 200 225 250 275 300
–75
–25
25
75
125
175
TIME – sec
TEMPERATURE – ꢁC
TPC 20. TMP03 Open-Collector Output Voltage
vs. Temperature
TPC 23. Thermal Response Time in Still Air
140
SOIC
100
TRANSITION FROM 100ꢁC OIL BATH
TO FORCED 25ꢁC AIR
120
V+ = 5V
= 10kꢃ
V+ = 5V
R
LOAD
100
TO –92
R
= 10kꢃ
LOAD
80
60
40
20
ꢅ
1.25 SEC (SOIC IN SOCKET)
ꢅ
2 SEC (TO –92 IN SOCKET)
TO –92 -WITH SOCKET
TO –92 - NO SOCKET
TRANSITION FROM STILL 25ꢁC AIR
TO STIRRED 100ꢁC OIL BATH
SOIC - NO SOCKET
25
0
0
10
20
30
50
60
40
100
200
300
400
0
500
600
700
TIME – sec
AIRVELOCITY – FPM
TPC 21. Thermal Time Constant in Forced Air
TPC 24. Thermal Response Time in Stirred Oil Bath
REV. A
–9–
TMP03/TMP04
APPLICATIONS INFORMATION
Supply Bypassing
TMP03 Output Configurations
The TMP03 (Figure 5a) has an open-collector NPN output
which is suitable for driving a high current load, such as an
opto-isolator. Since the output source current is set by the pull-
up resistor, output capacitance should be minimized in TMP03
applications. Otherwise, unequal rise and fall times will skew the
pulsewidth and introduce measurement errors. The NPN tran-
sistor has a breakdown voltage of 18 V.
Precision analog products, such as the TMP03, require a well-
filtered power source. Since the TMP03 operate from a single 5
V supply, it seems convenient to simply tap into the digital logic
power supply. Unfortunately, the logic supply is often a switch-
mode design, which generates noise in the 20 kHz to 1 MHz
range. In addition, fast logic gates can generate glitches hundred
of millivolts in amplitude due to wiring resistance and induc-
tance.
V+
D
OUT
If possible, the TMP03 should be powered directly from the
system power supply. This arrangement, shown in Figure 3, will
isolate the analog section from the logic switching transients. Even
if a separate power supply trace is not available, however, gener-
ous supply bypassing will reduce supply-line induced errors.
Local supply bypassing consisting of a 10 µF tantalum electro-
lytic in parallel with a 0.1 µF ceramic capacitor is recommended
(Figure 4a).
TMP03
D
TMP04
OUT
a.
b.
Figure 5. TMP03 Digital Output Structure
The TMP04 has a “totem-pole” CMOS output (Figure 5b) and
provides rail-to-rail output drive for logic interfaces. The rise
and fall times of the TMP04 output are closely matched, so that
errors caused by capacitive loading are minimized. If load ca-
pacitance is large, for example when driving a long cable, an
external buffer may improve accuracy. See the “Remote Tem-
perature Measurement” section of this data sheet for
suggestions.
TTL/CMOS
LOGIC
CIRCUITS
+
10ꢄF
TANT
TMP03/
TMP04
0.1ꢄF
5V
POWER SUPPLY
Interfacing the TMP03 to Low Voltage Logic
Figure 3. Use Separate Traces to Reduce Power Supply
Noise
The TMP03’s open-collector output is ideal for driving logic
gates that operate from low supply voltages, such as 3.3 V. As
shown in Figure 6, a pull-up resistor is connected from the low
voltage logic supply (2.9 V, 3 V, etc.) to the TMP03 output.
Current through the pull-up resistor should be limited to about
1 mA, which will maintain an output LOW logic level of
<200 mV.
5V
5V
50ꢃ
V+
V+
TMP03/
TMP04
TMP03/
TMP04
D
D
10ꢄF
0.1ꢄF
OUT
10ꢄF
0.1ꢄF
OUT
3.3V
5V
GND
GND
3.3kꢃ
V+
TO LOWVOLTAGE
LOGIC GATE INPUT
TMP03
D
OUT
a.
b.
GND
Figure 4. Recommended Supply Bypassing for the
TMP03
Figure 6. Interfacing to Low Voltage Logic
The quiescent power supply current requirement of the TMP03
is typically only 900 µA. The supply current will not change
appreciably when driving a light load (such as a CMOS gate), so
a simple RC filter can be added to further reduce power supply
noise (Figure 4b).
Remote Temperature Measurement
When measuring a temperature in situations where high com-
mon-mode voltages exist, an opto-isolator can be used to isolate
the output (Figure 7a). The TMP03 is recommended in this
application because its open-collector NPN transistor has a
higher current sink capability than the CMOS output of the
TMP04. To maintain the integrity of the measurement, the
opto-isolator must have relatively equal turn-on and turn-off
times. Some Darlington opto-isolators, such as the 4N32, have
a turn-off time that is much longer than their turn-on time. In
this case, the T1 time will be longer than T2, and an erroneous
reading will result. A PNP transistor can be used to provide
greater current drive to the opto-isolator (Figure 7b). An opto-
isolator with an integral logic gate output, such as the H11L1
from Quality Technology, can also be used (Figure 8).
–10–
REV. A
TMP03/TMP04
5V
5V
V+
620ꢃ
V
LOGIC
V+
OPTO-COUPLER
4.7kꢃ
DE
V
CC
B
A
DI
TMP03
D
OUT
D
OUT
TMP04
GND
NC
5V
GND
ADM485
a.
5V
Figure 9. A Differential Line Driver for Remote Tempera-
ture Measurement
10kꢃ
V
Microcomputer Interfaces
2N2907
LOGIC
The TMP03 output is easily decoded with a microcomputer.
The microcomputer simply measures the T1 and T2 periods in
software or hardware, and then calculates the temperature using
the equation in the Output Encoding section of this data sheet.
Since the TMP03’s output is ratiometric, precise control of the
counting frequency is not required. The only timing require-
ments are that the clock frequency be high enough to provide
the required measurement resolution (see the Output Encoding
section for details) and that the clock source be stable. The
ratiometric output of the TMP03 is an advantage because the
microcomputer’s crystal clock frequency is often dictated by the
serial baud rate or other timing considerations.
OPTO-COUPLER
430ꢃ
270ꢃ
V+
TMP03
4.3kꢃ
D
OUT
GND
b.
Figure 7. Optically Isolating the Digital Output
5V
Pulsewidth timing is usually done with the microcomputer’s
on-chip timer. A typical example, using the 80C51, is shown in
Figure 10. This circuit requires only one input pin on the micro-
computer, which highlights the efficiency of the TMP04’s
pulsewidth output format. Traditional serial input protocols,
with data line, clock and chip select, usually require three or
more I/O pins.
5V
680ꢃ
V+
4.7kꢃ
TMP03
D
OUT
H11L1
GND
5V
V+
Figure 8. An Opto-Isolator with Schmitt Trigger Logic
Gate Improves Output Rise and Fall Times
D
INPUT
PORT 1.0
OUT
ꢆ12
OSC
TMOD REGISTER
TIMER 0 TIMER 1
The TMP03 and TMP04 are superior to analog-output trans-
ducers for measuring temperature at remote locations, because
the digital output provides better noise immunity than an analog
signal. When measuring temperature at a remote location, the
ratio of the output pulses must be maintained. To maintain the
integrity of the pulsewidth, an external buffer can be added. For
example, adding a differential line driver such as the ADM485
permits precise temperature measurements at distances up to
4000 ft. (Figure 9). The ADM485 driver and receiver skew is
only 5 ns maximum, so the TMP04 duty cycle is not degraded.
Up to 32 ADM485s can be multiplexed onto one line by pro-
viding additional decoding.
TMP04
GND
TIMER 0
(16-BITS)
TCON REGISTER
TIMER 0 TIMER 1
80C51
MICROCOMPUTER
TIMER 1
(16-BITS)
Figure 10. A TMP04 Interface to the 80C51 Microcomputer
The 80C51 has two 16-bit timers. The clock source for the timers
is the crystal oscillator frequency divided by 12. Thus, a crystal
frequency of 12 MHz or greater will provide resolution of 1 µs
or less.
The 80C51 timers are controlled by two dedicated registers. The
TMOD register controls the timer mode of operation, while
TCON controls the start and stop times. Both the TMOD and
TCON registers must be set to start the timer.
As previously mentioned, the digital output of the TMP03
provides excellent noise immunity in remote measurement appli-
cations. The user should be aware, however, that heat from an
external cable can be conducted back to the TMP03. This heat
conduction through the connecting wires can influence the
temperature of the TMP03. If large temperature differences
exist within the sensor environment, an opto-isolator, level
shifter or other thermal barrier can be used to minimize measure-
ment errors.
REV. A
–11–
TMP03/TMP04
Software for the interface is shown in Listing 1. The program
monitors the TMP04 output, and turns the counters on and off
to measure the duty cycle. The time that the output is high is mea-
sured by Timer 0, and the time that the output is low is measured
by Timer 1. When the routine finishes, the results are available
in Special Function Registers (SFRs) 08AH through 08DH.
Listing 1. An 80C51 Software Routine for the TMP04
Test of a TMP04 interface to the 8051,
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
using timer 0 and timer 1 to measure the duty cycle
This program has three steps:
1. Clear the timer registers, then wait for a low-to-
high transition on input P1.0 (which is connected
to the output of the TMP04).
2. When P1.0 goes high, timer 0 starts. The program
then loops, testing P1.0.
3. When P1.0 goes low, timer 0 stops & timer 1 starts. The
program loops until P1.0 goes low, when timer 1 stops
and the TMP04’s T1 and T2 values are stored in Special
Function registers 8AH through 8DH (TL0 through TH1).
Primary controls
$MOD51
$TITLE(TMP04 Interface, Using T0 and T1)
$PAGEWIDTH(80)
$DEBUG
$OBJECT
;
;
;
Variable declarations
PORT1
;TCON
;TMOD
;TH0
;TH1
;TL0
;TL1
;
DATA
DATA
DATA
DATA
DATA
DATA
DATA
90H
88H
89H
8CH
8DH
8AH
8BH
;SFR register for port 1
;timer control
;timer mode
;timer 0 hi byte
;timer 1 hi byte
;timer 0 lo byte
;timer 1 low byte
;
ORG
100H
;arbitrary start
;
READ_TMP04:
MOV
MOV
MOV
MOV
MOV
JB
MOV
MOV
JNB
A,#00
TH0,A
TH1,A
TL0,A
TL1,A
PORT1.0,WAIT_LO
A,#11H
TMOD,A
PORT1.0,WAIT_HI
;clear the
; counters
;
;
;
first
WAIT_LO:
;wait for TMP04 output to go low
;get ready to start timer0
WAIT_HI:
;
;wait for output to go high
;Timer 0 runs while TMP04 output is high
;
SETB
JB
CLR
TCON.4
PORT1.0,WAITTIMER0
TCON.4
;start timer 0
WAITTIMER0:
;
;shut off timer 0
;Timer 1 runs while TMP04 output is low
;
SETB
JNB
CLR
MOV
MOV
RET
END
TCON.6
PORT1.0,WAITTIMER1
TCON.6
A,#0H
TMOD,A
;start timer 1
WAITTIMER1:
;stop timer 1
;get ready to disable timers
–12–
REV. A
TMP03/TMP04
When the READ_TMP04 routine is called, the counter registers
are cleared. The program sets the counters to their 16-bit mode,
and then waits for the TMP04 output to go high. When the
input port returns a logic high level, Timer 0 starts. The timer
continues to run while the program monitors the input port.
When the TMP04 output goes low, Timer 0 stops and Timer 1
starts. Timer 1 runs until the TMP04 output goes high, at which
time the TMP04 interface is complete. When the subroutine
ends, the timer values are stored in their respective SFRs and
the TMP04’s temperature can be calculated in software.
Figure 11, therefore, loading 4 into the prescaler will divide the
10 MHz crystal oscillator by 5 and thereby decrement the counter
at a 2 MHz rate. The TMP04 output is ratiometric, of course,
so the exact clock frequency is not important.
A typical software routine for interfacing the TMP04 to the
ADSP2101 is shown in Listing 2. The program begins by initial-
izing the prescaler and loading the counter with 0FFFFH. The
ADSP2101 monitors the FI flag input to establish the falling
edge of the TMP04 output, and starts the counter. When the
TMP04 output goes high, the counter is stopped. The
counter value is then subtracted from 0FFFFH to obtain the
actual number of counts, and the count is saved. Then the
counter is reloaded and runs until the TMP04 output goes low.
Finally, the TMP04 pulsewidths are converted to temperature
using the scale factor of Equation 1.
Since the 80C51 operates asynchronously to the TMP04, there
is a delay between the TMP04 output transition and the start
of the timer. This delay can vary between 0 µs and the execution
time of the instruction that recognized the transition. The
80C51’s “jump on port.bit” instructions (JB and JNB) require
24 clock cycles for execution. With a 12 MHz clock, this pro-
duces an uncertainty of 2 µs (24 clock cycles/12 MHz) at each
transition of the TMP04 output. The worst case condition occurs
when T1 is 4 µs shorter than the actual value and T2 is 4 µs
longer. For a 25°C reading (“room temperature”), the nominal
error caused by the 2 µs delay is only about 0.15°C.
Some applications may require a hardware interface for the
TMP04. One such application could be to monitor the tempera-
ture of a high power microprocessor. The TMP04 interface
would be included as part of the system ASIC, so that the micro-
processor would not be burdened with the overhead of timing
the output pulsewidths.
The TMP04 is also easily interfaced to digital signal processors
(DSPs), such as the ADSP210x series. Again, only a single I/O
pin is required for the interface (Figure 11).
A typical hardware interface for the TMP04 is shown in Figure
12. The circuit measures the output pulsewidths with a resolu-
tion of 1 µs. The TMP04 T1 and T2 periods are measured
with two cascaded 74HC4520 8-bit counters. The counters,
accumulating clock pulses from the 1 MHz external oscillator,
have a maximum period of 65 ms.
10MHz
5V
V+
D
FI (FLAG IN)
OUT
The logic interface is straightforward. On both the rising and
falling edges of the TMP04 output, an exclusive-or gate gener-
ates a pulse. This pulse triggers one half of a 74HC4538 dual
one-shot. The pulse from the one-shot is ANDed with the
TMP04 output polarity to store the counter contents in the
appropriate output registers. The falling edge of this pulse also
triggers the second one-shot, which generates a reset pulse for
the counters. After the reset pulse, the counters will begin to
count the next TMP04 output phase.
CLOCK
OSCILLATOR
TIMER
ENABLE
TMP04
GND
16-BIT DOWN
COUNTER
ꢆn
ADSP-210x
Figure 11. Interfacing the TMP04 to the ADSP-210x Digital
Signal Processor
The ADSP2101 only has one counter, so the interface software
differs somewhat from the 80C51 example. The lack of two
counters is not a limitation, however, because the DSP archi-
tecture provides very high execution speed. The ADSP-2101
executes one instruction for each clock cycle, versus one instruc-
tion for twelve clock cycles in the 80C51, so the ADSP-2101
actually produces a more accurate conversion while using a
lower oscillator frequency.
As previously mentioned, the counters have a maximum period
of 65 ms with a 1 MHz clock input. However, the TMP04’s T1
and T2 times will never exceed 32 ms. Therefore, the most
significant bit (MSB) of counter #2 will not go high in nor-
mal operation, and can be used to warn the system that an
error condition (such as a broken connection to the TMP04)
exists.
The timer of the ADSP2101 is implemented as a down counter.
When enabled by means of a software instruction, the counter is
decremented at the clock rate divided by a programmable pres-
caler. Loading the value n – 1 into the prescaler register will
divide the crystal oscillator frequency by n. For the circuit of
The circuit of Figure 12 will latch and save both the T1 and T2
times simultaneously. This makes the circuit suitable for debug-
ging or test purposes as well as for a general purpose hardware
interface. In a typical ASIC application, of course, one set of
latches could be eliminated if the latch contents, and the output
polarity, were read before the next phase reversal of the TMP04.
REV. A
–13–
TMP03/TMP04
Listing 2. Software Routine for the TMP04-to-ADSP-210x Interface
;
{ ADSP-21XX Temperature Measurement Routine
TEMPERAT.DSP
Altered Registers:
ax0, ay0, af, ar,
si, sr0,
my0, mr0, mr1, mr2.
Return value:
ar —> temperature result in 14.2 format
Computation time:
2 * TMP04 output period
}
.MODULE/RAM/BOOT=0
.ENTRY TEMPMEAS;
.CONST PRESCALER=4;
TEMPERAT;
{ Beginning TEMPERAT Program }
{ Entry point of this subroutine }
.CONST TIMFULSCALE=0Xffff;
TEMPMEAS:
si=PRESCALER;
sr0=TIMFULSCALE;
dm(0x3FFB)=si;
si=TIMFULSCALE;
dm(0x3FFC)=si;
dm(0x3FFD)=si;
imask=0x01;
{ For timer prescaler }
{ Timer counter full scale }
{ Timer Prescaler set up to 5 }
{ CLKin=10MHz,Timer Period=32.768ms }
{ Timer Counter Register to 65535 }
{ Timer Period Register to 65535 }
{ Unmask Interrupt timer }
TEST1:
TEST0:
if not fi jump TEST1;
if fi jump TEST0;
ena timer;
if not fi jump COUNT2;
dis timer;
{ Check for FI=1 }
{ Check for FI=0 to locate transition }
{ Enable timer, count at a 500ns rate }
{ Check for FI=1 to stop count }
COUNT2:
ay0=dm(0x3FFC);
ar=sr0-ay0;
{ Save counter=T2 in ALU register }
ax0=ar;
dm(0x3FFC)=si;
ena timer;
if fi jump COUNT1;
dis timer;
ay0=dm(0x3FFC);
ar=sr0-ay0;
{ Reload counter at full scale }
{ Check for FI=0 to stop count }
{ Save counter=T1 in ALU register }
COUNT1:
my0=400;
mr=ar*my0(uu);
ay0=mr0;
ar=mr1; af=pass ar;
astat=0;
{ mr=400*T1 }
{ af=MSW of dividend, ay0=LSW }
{ ax0=16-bit divisor }
{ To clear AQ flag }
COMPUTE:
divq ax0; divq ax0;
divq ax0; divq ax0;
divq ax0; divq ax0;
divq ax0; divq ax0;
divq ax0; divq ax0;
divq ax0; divq ax0;
divq ax0; divq ax0;
divq ax0; divq ax0;
divq ax0; divq ax0;
ax0=0x03AC;
{ Division 400*T1/T2 }
{ with 0.3 < T1/T2 < 0.7 }
{ Result in ay0 }
{ ax0=235*4 }
ar=ax0-ay0;
rts;
{ ar=235-400*T1/T2, result in øC }
{ format 14.2 }
.ENDMOD;
{ End of the subprogram }
–14–
REV. A
TMP03/TMP04
T1 DATA (MICROSECONDS)
5V
T2 DATA (MICROSECONDS)
5V
20
5V
20
5V
20
2
5
6
9
12 15 16 19
Q5 Q6 Q7 Q8
2
5
6
9
12 15 16 19
Q5 Q6 Q7 Q8
2
5
6
9
12 15 16 19
Q5 Q6 Q7 Q8
2
5
6
9
12 15 16 19
Q5 Q6 Q7 Q8
Q1 Q2 Q3 Q4
Q1 Q2 Q3 Q4
Q1 Q2 Q3 Q4
Q1 Q2 Q3 Q4
20
11
1
1
1
1
V
V
V
V
CC
CC
CC
CC
OUT
GND
OUT
GND
OUT
GND
OUT
GND
74HC373
74HC373
74HC373
74HC373
11
10
11
LE
10
10
10
11
LE
LE
LE
D1 D2 D3 D4
D5 D6 D7 D8
D1 D2 D3 D4
D5 D6 D7 D8
D1 D2 D3 D4
D5 D6 D7 D8
D4
D1 D2 D3
D5 D6 D7
D8
1
2
5V
3
4
7
8
13 14 17 18
3
4
7
8
13 14 17 18
3
3
4
7
8
13 14 17 18
1
2
3
4
7
8
13 14 17 18
3
74HC08
4
6
5
5V
3
4
5
6
10 11 12 13 14
3
4
5
6
10 11 12 13 14
5V
Q0 Q1 Q2 Q3 EN Q0 Q1 Q2 Q3
Q0 Q1 Q2 Q3 EN Q0 Q1 Q2 Q3
16
2
16
2
V
V
CC
CC
74HC4520 #1
74HC4520 #2
EN
EN
1
1MHZ
CLK
CLOCK
CLK
1
CLK GND RESET RESET
CLK GND RESET RESET
9
8
7
8
15
15
9
7
5V
20pF
20pF
3.9kꢃ
1kꢃ
5V
15
T1
14
T2
74HC86
4
5
T1
T2
12
6
4
5
3
16
6
A
B
A
B
V
CC
10
9
5V
11
13
Q
Q
Q
Q
10kꢃ
10pF
7
5V
CLR
NC
CLR
NC
GND
8
GND
8
0.1ꢄF
10ꢄF
74HC4538
V+
D
OUT
TMP04
GND
Figure 12. A Hardware Interface for the TMP04
while the TMP03 temperature is monitored by measuring T1
and T2. Once the thermal impedance is determined, the tem-
perature of the heat source can be inferred from the TMP03
output.
Monitoring Electronic Equipment
The TMP03 are ideal for monitoring the thermal environment
within electronic equipment. For example, the surface-mounted
package will accurately reflect the exact thermal conditions which
affect nearby integrated circuits. The TO-92 package, on the
other hand, can be mounted above the surface of the board, to
measure the temperature of the air flowing over the board.
One example of using the TMP04 to monitor a high power
dissipation microprocessor or other IC is shown in Figure 13.
The TMP04, in a surface mount package, is mounted directly
beneath the microprocessor’s pin grid array (PGA) package. In
a typical application, the TMP04’s output would be connected
to an ASIC where the pulsewidth would be measured (see the
Hardware Interface section of this data sheet for a typical inter-
face schematic). The TMP04 pulse output provides a significant
The TMP03 and TMP04 measure and convert the temperature
at the surface of their own semiconductor chip. When the TMP03
are used to measure the temperature of a nearby heat source,
the thermal impedance between the heat source and the TMP03
must be considered. Often, a thermocouple or other tempera-
ture sensor is used to measure the temperature of the source
REV. A
–15–
TMP03/TMP04
advantage in this application because it produces a linear tem-
perature output while needing only one I/O pin and without
requiring an A/D converter.
Thermal Response Time
The time required for a temperature sensor to settle to a speci-
fied accuracy is a function of the thermal mass of, and the
thermal conductivity between, the sensor and the object being
sensed. Thermal mass is often considered equivalent to capaci-
tance. Thermal conductivity is commonly specified using the
symbol Θ, and can be thought of as thermal resistance. It is
commonly specified in units of degrees per watt of power trans-
ferred across the thermal joint. Thus, the time required for the
TMP03 to settle to the desired accuracy is dependent on the
package selected, the thermal contact established in that par-
ticular application, and the equivalent power of the heat source.
In most applications, the settling time is probably best deter-
mined empirically. The TMP03 output operates at a nominal
frequency of 35 Hz at 25°C, so the minimum settling time reso-
lution is 27 ms.
FAST MICROPROCESSOR, DSP, ETC., IN PGA PACKAGE
PGA SOCKET
TMP04 IN SURFACE MOUNT PACKAGE
PC BOARD
Figure 13. Monitoring the Temperature of a High Power
Microprocessor Improves System Reliability
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
3-Pin TO-92
8-Pin SOIC (SO-8)
0.1968 (5.00)
0.1890 (4.80)
0.205 (5.20)
0.175 (4.96)
0.135
(3.43)
MIN
8
1
5
4
0.2440 (6.20)
0.2284 (5.80)
0.1574 (4.00)
0.1497 (3.80)
0.210 (5.33)
0.170 (4.38)
0.050
(1.27)
MAX
SEATING
PLANE
PIN 1
0.0196 (0.50)
0.0099 (0.25)
0.0500 (1.27)
BSC
؋
45؇ 0.0688 (1.75)
0.0532 (1.35)
0.0098 (0.25)
0.0040 (0.10)
0.019 (0.482)
0.016 (0.407)
0.500
(12.70)
MIN
8؇
0؇
0.0500 (1.27)
0.0160 (0.41)
0.0192 (0.49)
0.0138 (0.35)
0.0098 (0.25)
0.0075 (0.19)
SEATING
PLANE
SQUARE
8-Pin TSSOP (RU-8)
0.055 (1.39)
0.045 (1.15)
0.105 (2.66)
0.095 (2.42)
0.122 (3.10)
0.114 (2.90)
0.105 (2.66)
0.080 (2.42)
8
5
0.177 (4.50)
0.169 (4.30)
0.165 (4.19)
0.125 (3.94)
1
2
3
0.105 (2.66)
0.080 (2.42)
0.256 (6.50)
0.246 (6.25)
1
4
BOTTOM
VIEW
PIN 1
0.0256 (0.65)
BSC
0.0433
(1.10)
MAX
0.006 (0.15)
0.002 (0.05)
SEATING
PLANE
8؇
0؇
0.0118 (0.30)
0.0075 (0.19)
0.028 (0.70)
0.020 (0.50)
0.0079 (0.20)
0.0035 (0.090)
–16–
REV. A
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