LT1019AMH-4.5 [Linear]
Precision Reference; 精密基准
| 型号： | LT1019AMH-4.5 |
| 厂家： | 
Linear |
| 描述： | Precision Reference |
| 文件： | 总12页 (文件大小：161K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT1019
Pre c isio n Re fe re nc e
U
FEATURES
DESCRIPTIO
The LT®1019 is a third generation bandgap voltage refer-
ence utilizing thin film technology and a greatly improved
curvature correction technique. Wafer level trimming of
both reference and output voltage combines to produce
units with high yields to very low TC and tight initial
tolerance of output voltage.
■
Tight Initial Output Voltage: <0.05%
Ultralow Drift: 3ppm/°C Typical
Series or Shunt Operation
Curvature Corrected
Ultrahigh Line Rejection: ≈0.5ppm/V
Low Output Impedance: ≈0.02Ω
Plug-In Replacement for Present References
Available at 2.5V, 4.5V, 5V, and 10V
■
■
■
■
■
■
The LT1019 can both sink and source up to 10mA and can
be used in either the series or shunt mode. This allows the
reference to be used for both positive and negative output
voltages without external components. Minimum input/
outputvoltageis less than1Vintheseries mode,providing
improved tolerance of low line conditions.
■
■
100% Noise Tested
Temperature Output
Industrial Temperature Range in SO-8
■
■
U
APPLICATIO S
■
The LT1019 is available in four voltages: 2.5V, 4.5V, 5V
and 10V. It is a direct replacement for most bandgap
references presently available including AD580, AD581,
REF-01, REF-02, MC1400, MC1404 and LM168.
Negative Shunt References
A/D and D/A Converters
Precision Regulators
Constant Current Sources
V/F Converters
Bridge Excitation
■
■
■
■
■
, LTC and LT are registered trademarks of Linear Technology Corporation.
U
TYPICAL APPLICATION
Output Voltage Drift
Ultralinear Strain Guage
15V
357Ω*
0.5W
5V
1.003
R3
2M
10ppm/°C
FULL TEMP RANGE “BOX”
1.002
IN
OUT
350Ω
BRIDGE
LT1019-5
GND
1.001
R2
20k
–
LT1019
CURVE
+
–
1.000
A1†
LT1637
A2
LT1001
R4
20k
GAIN = 100
+
0.999
5ppm/°C
0°C TO 70°C “BOX”
ACTIVE
ELEMENT
R5
2M
0.998
UNCOMPENSATED
“STANDARD” BANDGAP
DRIFT CURVE
R6**
2M
0.997
50
TEMPERATURE (˚C)
100 125
–50 –25
0
25
75
LT1019 • TA01
–5V
357Ω*
0.5W
*REDUCES REFERENCE AND AMPLIFIER
LOADING TO ≈0.
1019 TA02
**IF R6 = R3, BRIDGE IS NOT LOADED BY R2 AND R4.
–15V
†A1 V AND DRIFT ARE NOT CRITICAL BECAUSE A2
OS
ACTS AS A DIFFERENTIAL AMPLIFIER.
1
LT1019
ABSOLUTE AXI U RATI GS
W W W
U
(Note 1)
Specified Temperature Range
Input Voltage .......................................................... 40V
Output Voltage (Note 2)
LT1019-5, LT1019-10 ........................................ 16V
LT1019-2.5, LT1019-4.5 ...................................... 7V
Output Short-Circuit Duration (Note 2)
Commercial ............................................. 0°C to 70°C
Industrial ............................................ –40°C to 85°C
Military ............................................. –55°C to 125°C
Trim Pin Voltage ................................................... ±30V
Temp Pin Voltage ..................................................... 5V
Storage Temperature Range (Note 11) – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
V < 20V.................................................... Indefinite
IN
20V ≤ V ≤ 35V ............................................. 10 sec
IN
W
U
/O
PACKAGE RDER I FOR ATIO
TOP VIEW
DNC*
TOP VIEW
TOP VIEW
8
DNC*
INPUT
TEMP
GND
1
2
3
4
DNC*
8
7
6
5
1
2
3
4
8
7
6
5
DNC*
INPUT
TEMP
GND
DNC*
DNC*
INPUT
TEMP
1
3
7
DNC*
OUTPUT
TRIM
DNC*
DNC*
6
2
OUTPUT
TRIM
OUTPUT
TRIM
5
4
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
GND (CASE)
8-LEAD PLASTIC SO
H PACKAGE
8-LEAD TO-5 METAL CAN
*INTERNALLY CONNECTED. DO NOT
CONNECT EXTERNALLY.
*INTERNALLY CONNECTED. DO NOT
CONNECT EXTERNALLY.
*INTERNALLY CONNECTED. DO NOT
CONNECT EXTERNALLY
T
JMAX = 100°C, θJA = 130°C/ W
TJMAX = 100°C, θJA = 130°C/ W
T
JMAX = 150°C, θJA = 150°C/ W, θJC = 45°C/W
ORDER PART
NUMBER
ORDER PART
NUMBER
S8 PART
MARKING
ORDER PART
NUMBER
LT1019CH-2.5
LT1019ACH-4.5 LT1019CH-4.5
LT1019ACN8-2.5
LT1019ACS8-2.5
LT1019ACS8-5
LT1019AIS8-2.5
LT1019AIS8-5
LT1019CS8-2.5
LT1019CS8-4.5
LT1019CS8-5
LT1019CS8-10
LT1019IS8-2.5
LT1019IS8-5
19A25
19A05
19AI2
19AI5
1925
1945
1905
1910
19I25
19I05
LT1019ACH-2.5
LT1019CN8-5
LT1019CN8-10
LT1019IN8-2.5
LT1019IN8-4.5
LT1019IN8-5
LT1019IN8-10
LT1019ACN8-4.5
LT1019ACN8-5
LT1019ACN8-10
LT1019CN8-2.5
LT1019CN8-4.5
LT1019CH-5
LT1019ACH-10 LT1019CH-10
LT1019MH-2.5
LT1019ACH-5
LT1019AMH-2.5
LT1019AMH-4.5 LT1019MH-4.5
LT1019MH-5
LT1019AMH-10 LT1019MH-10
LT1019AMH-5
2
LT1019
U
AVAILABLE OPTIO S
PACKAGE TYPE
OUTPUT
VOLTAGE
(V)
TEMPERATURE
COEFFICIENT
TEMPERATURE
C)
ACCURACY
(%)
TO-5
H8
SO-8
S8
PDIP-8
N8
(
°
(ppm/°C)
2.5
0 to 70
–40 to 85
–55 to 125
0 to 70
0.05
0.2
5
20
LT1019ACH-2.5
LT1019CH-2.5
LT1019ACS8-2.5
LT1019CS8-2.5
LT1019ACN8-2.5
LT1019CN8-2.5
0.05
0.2
10
20
LT1019AIS8-2.5
LT1019IS8-2.5
LT1019IN8-2.5
0.05
0.2
10
25
LT1019AMH-2.5
LT1019MH-2.5
4.5
0.05
0.2
5
20
LT1019ACH-4.5
LT1019CH-4.5
LT1019ACN8-4.5
LT1019CN8-4.5
LT1019CS8-4.5
–40 to 85
0.2
20
LT1019IN8-4.5
–55 to 125
0.05
0.2
10
25
LT1019AMH-4.5
LT1019MH-4.5
5
0 to 70
–40 to 85
–55 to 125
0 to 70
0.05
0.2
5
20
LT1019ACH-5
LT1019CH-5
LT1019ACS8-5
LT1019CS8-5
LT1019ACN8-5
LT1019CN8-5
0.05
0.2
10
20
LT1019AIS8-5
LT1019IS8-5
LT1019IN8-5
0.05
0.2
10
25
LT1019AMH-5
LT1019MH-5
10
0.05
0.2
5
20
LT1019ACH-10
LT1019CH-10
LT1019ACN8-10
LT1019CN8-10
LT1019CS8-10
–40 to 85
0.2
20
LT1019IN8-10
–55 to 125
0.05
0.2
10
25
LT1019AMH-10
LT1019MH-10
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T = 25°C.
A
V = 15V, IOUT = 0 unless otherwise noted.
IN
LT1019A
MIN TYP
LT1019
TYP
SYMBOL
PARAMETER
CONDITIONS
MAX
MIN
MAX
UNITS
Output Voltage Tolerance
0.02
0.05
0.02
0.2
%
TC
Output Voltage
Temperature Coefficient
(Note 3)
LT1019C (0°C to 70°C)
LT1019I (–40°C to 85°C)
LT1019M (–55°C to 125°C)
●
●
●
3
3
5
5
10
10
5
5
8
20
20
25
ppm/°C
ppm/°C
ppm/°C
∆V
∆V
Line Regulation (Note 4)
(V + 1.5V) ≤ V ≤ 40V
0.5
1.0
3
5
0.5
1.0
3
5
ppm/V
ppm/V
OUT
OUT
IN
●
●
IN
RR
Ripple Rejection
50Hz ≤ f ≤ 400Hz
90
84
110
90
84
110
dB
dB
3
LT1019
ELECTRICAL CHARACTERISTICS
V = 15V, IOUT = 0 unless otherwise noted.
IN
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T = 25°C.
A
LTC1019A
MIN TYP
LTC1019
TYP
SYMBOL PARAMETER
CONDITIONS
0 ≤ I ≤ 10mA (Note 5)
MAX
MIN
MAX
UNITS
∆V
Load Regulation Series
Mode (Notes 4, 5)
0.02
0.05
0.08
0.02
0.05
0.08
mV/mA (Ω)
mV/mA (Ω)
OUT
OUT
∆I
OUT
●
Load Regulation,
Shunt Mode
1mA ≤ I
≤ 10mA (Notes 5, 6)
SHUNT
2.5V, 4.5V, 5V
10V
●
●
0.1
0.4
0.8
0.1
0.4
0.8
mV/mA (Ω)
mV/mA (Ω)
Thermal Regulation (Note 7) ∆P = 200mW, t = 50ms
0.1
0.5
0.1
0.5
ppm/mW
I
Q
Quiescent Current
Series Mode
0.65
1.0
1.3
0.65
1.2
1.5
mA
mA
●
●
Minimum Shunt Current
(Note 8)
0.5
0.9
0.8
0.5
0.9
0.8
mA
Minimum Input/Output
Voltage Differential
I
≤ 1mA
●
●
1.1
1.3
1.1
1.3
V
V
OUT
I
= 10mA
OUT
Trim Range
LT1019-2.5
LT1019-5
LT1019-10
±3.5
±3.5 5, –13
±3.5 5, –27
±6
±3.5
±3.5 5, –13
±3.5 5, –27
±6
%
%
%
I
Short-Circuit Current
Output Connected to GND
2V ≤ V ≤ 35V
15
10
25
50
4
15
10
25
50
4
mA
mA
SC
IN
●
e
Output Voltage Noise
(Note 10)
10Hz ≤ f ≤ 1kHz
0.1Hz ≤ f ≤ 10Hz
2.5
2.5
2.5
2.5
ppm (RMS)
ppm (P-P)
n
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 7: Thermal regulation is caused by die temperature gradients created
by load current or input voltage changes. This effect must be added to
normal line or load regulation.
Note 2: These are high power conditions and are therefore guaranteed
only at temperatures equal to or below 70°C. Input is either floating, tied to
output or held higher than output.
Note 8: Minimum shunt current is measured with shunt voltage held
20mV below the value measured at 1mA shunt current.
Note 3: Output voltage drift is measured using the box method. Output
Note 9: Minimum input/output voltage is measured by holding input
voltage is recorded at T , 25°C and T . The lowest of these three
voltage 0.5V above the nominal output voltage, while measuring
MIN
MAX
readings is subtracted from the highest and the resultant difference is
divided by (T – T ).
V – V
.
IN
OUT
MAX
MIN
Note 10: RMS noise is measured with a single pole highpass filter at 10Hz
and a 2-pole lowpass filter at 1kHz. The resulting output is full-wave
rectified and then integrated for a fixed period, making the final reading an
average as opposed to RMS. A correction factor of 1.1 is used to convert
from average to RMS, and a second correction of 0.88 is used to correct
the nonideal bandpass of the filters.
Note 4: Line regulation and load regulation are measured on a pulse basis
with low duty cycle. Effects due to die heating must be taken into account
separately. See thermal regulation and application section.
Note 5: Load regulation is measured at a point 1/8" below the base of the
package with Kelvin contacts.
Note 11: If the part is stored outside of the specified temperature range,
the output may shift due to hysteresis.
Note 6: Shunt regulation is measured with the input floating. This
parameter is also guaranteed with the input connected (V – V ) > 1V,
IN
OUT
0mA ≤ I
≤ 10mA. Shunt and sink current flow into the output.
SINK
4
LT1019
U W
TYPICALPERFOR A CE CHARACTERISTICS
Quiescent Current
(LT1019-4.5/LT1019-5)
Quiescent Current (LT1019-2.5)
Quiescent Current (LT1019-10)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
125°C
25°C
125°C
125°C
25°C
25°C
–55°C
–55°C
–55°C
15 20
INPUT VOLTAGE (V)
15 20
15 20
0
5
10
25 30 35 40 45
0
5
10
25 30 35 40 45
0
5
10
25 30 35 40 45
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
LT1019 • TPC01
LT1019 • TPC02
LT1019 • TPC03
Minimum Input/Output Voltage
Differential
Load Regulation
Ripple Rejection
120
110
100
90
10
7.5
5.0
2.5
0
2.0
1.5
T = 25°C
J
T = 25°C
J
LT1019-10
LT1019-10
1.0
LT1019-4.5
LT1019-5
LT1019-2.5
LT1019-4.5/LT1019-5
0.5
LT1019-2.5
0
80
T = 125°C
T = –55°C
J
J
–0.5
–1.0
–1.5
–2.0
70
T = 25°C
J
60
50
40
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8
INPUT/OUTPUT VOLTAGE (V)
–10 –8 –6 –4 –2
SINKING
0
2
4
6
8
10
10
100
1k
10k
100k
1M
SOURCING
OUTPUT CURENT (mA)
FREQUENCY (Hz)
LT1019 • TPC04
LT1019 • TPC06
LT1019 • TPC05
Shunt Mode Characteristics
(LT1019-2.5)
Shunt Mode Characteristics
(LT1019-5)
Shunt Mode Characteristics
(LT1019-10)
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
INPUT OPEN
INPUT OPEN
INPUT OPEN
T = 125°C
J
T = 125°C
J
T = 125°C
J
T = 25°C
J
T = 25°C
J
T = 25°C
J
T = –55°C
J
T = –55°C
T = –55°C
J
J
0
2.0
3.0 3.5
0
7
0
14
OUTPUT-TO-GROUND VOLTAGE (V)
0.5 1.0 1.5
2.5
4.0
1
2
3
4
5
6
8
2
4
6
8
10 12
16
OUTPUT-TO-GROUND VOLTAGE (V)
OUTPUT-TO-GROUND VOLTAGE (V)
LT1019 • TPC07
LT1019 • TPC08
LT1019 • TPC09
5
LT1019
TYPICALPERFOR A CE CHARACTERISTICS
U W
LT1019-2.5* Stability with
Output Capacitance
Temp Pin Voltage
Line Regulation
140
120
100
80
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
0.45
0.40
10
1
I
OUT
J
T = 25°C
REGION OF POSSIBLE
INSTABILITY
60
0.1
LT1019-10
LT1019-5
40
20
0.01
0.001
0.0001
LT1019-2.5
0
–10
–20
–30
0
20
30 35
5
10 15
25
40
–50
0
25
50
75 100 125
–25
20 15 10
5
0
5
10 15 20
INPUT VOLTAGE (V)
SINK CURRENT
SOURCE CURRENT
JUNCTION TEMPERATURE (°C)
OUTPUT CURRENT (mA)
LT1019 • TPC11
LT1019 • TPC10
1019 G12
*LT1019-4.5/LT1019-5/LT1019-10 ARE STABLE
WITH ALL LOAD CAPACITANCE.
W
BLOCK DIAGRA
R1
LT1019-2.5 = 11k
LT1019-4.5 = 13.9k
LT1019-5 = 16k
LT1019-10 = 37.1k
V
IN
R3
80k
–
TRIM
R2
V
OUT
1.188V
LT1019-4.5, LT1019-5,
LT1019-10 = 5k
+
LT1019-2.5 = 10k
GND
LT1019 • BD
U U W
U
APPLICATIO S I FOR ATIO
Line and Load Regulation
Two separate thermal effects are evident in monolithic
circuits. One is a gradient effect, where power dissipation
on the die creates temperature gradients. These gradients
cancauseoutputvoltageshifts eveniftheoveralltempera-
turecoefficientofthereferenceis zero.TheLT1019,unlike
previous references, specifies thermal regulation caused
by die temperature gradients.The specification is
0.5ppm/mW. To calculate the effect on output voltage,
simply multiply the change in device power dissipation by
Line regulation on the LT1019 is nearly perfect. A 10V
changeininputvoltagecauses atypicaloutputshiftofless
than5ppm.Loadregulation(sourcingcurrent)is nearlyas
good. A 5mA change in load current shifts output voltage
byonly100µV. Theseareelectrical effects, measuredwith
low duty cycle pulses to eliminate heating effects. In real
world applications, the thermal effects of load and line
changes must be considered.
6
LT1019
U U W
APPLICATIO S I FOR ATIO
U
the thermal regulation specification. Example: a 10V
device with a nominal input voltage of 15V and load
current of 5mA. Find the effect of an input voltage change
of 1V and a load current change of 2mA.
Warm-up drift = [(V )(IQ) + (V – VOUT)(ILOAD)]
[(θJA)(TC)]
with IQ (quiescent current) = 0.6mA,
IN
IN
Warm-up drift = [(15V)(0.6mA) + (5V)(5mA)]
[(150°C/W)(25ppm/°C)]
∆P (line change) = (∆V )(ILOAD) = (1V)(5mA) = 5mW
IN
∆VOUT = (0.5ppm/mW)(5mW) = 2.5ppm
= 127.5ppm
∆P (load change) = (∆ILOAD)(V – VOUT
)
IN
Note that 74% of the warm-up drift is due to load current
times input/output differential. This emphasizes the
importance of keeping both these numbers low in critical
applications.
= (2mA)(5V) = 10mW
∆VOUT = (0.5ppm/mW)(10mW) = 5ppm
Even though these effects are small, they should be taken
intoaccountincriticalapplications, especiallywhereinput
voltage or load current is high.
Note that line regulation is now affected by reference
output impedance. R1 should have a wattage rating high
enough to withstand full input voltage if output shorts
must be tolerated. Even with load currents below 10mA,
R1 can be used to reduce power dissipation in the LT1019
for lower warm-up drift, etc.
The second thermal effect is overall die temperature
change. The magnitude of this change is the product of
change in power dissipation times the thermal resistance
(θJA) of the IC package (100°C/W to 150°C/W). The
effect on the reference output is calculated by multiplying
dietemperaturechangebythetemperaturedriftspecifica-
tion of the reference. Example: same conditions as above
with θJA = 150°C/W and an LT1019 with 20ppm/°C drift
specification.
Output Trimming
Output voltage trimming on the LT1019 is nominally
accomplished with a potentiometer connected from out-
put to ground with the wiper tied to the trim pin. The
LT1019was madecompatiblewithexistingreferences, so
the trim range is large: +6%, –6% for the LT1019-2.5,
+5%, –13% for the LT1019-5, and +5%, –27% for the
LT1019-10. This large trim range makes precision trim-
ming rather difficult. One solution is to insert resistors in
series with both ends of the potentiometer. This has the
disadvantage of potentially poor tracking between the
fixedresistors andthe potentiometer. Asecondmethodof
reducing trim range is to insert a resistor in series with the
wiper of the potentiometer. This works well only for very
small trim range because of the mismatch in TCs between
the series resistor and the internal thin film resistors.
These film resistors can have a TC as high as 500ppm/°C.
That same TC is then transferred to the change in output
voltage: a 1% shift in output voltage causes a
(500ppm)(1%) = 5ppm/°C change in output voltage drift.
∆P (line change) = 5mW
∆VOUT = (5mW)(150°C/W)(20ppm/°C)
= 15ppm
∆P (load change) = 10mW
∆VOUT = (10mW)(150°C/W)(20ppm/°C)
= 30ppm
These calculations show that thermally induced output
voltage variations can easily exceed the electrical effects.
In critical applications where shifts in power dissipation
are expected, a small clip-on heat sink can significantly
improve these effects by reducing overall die temperature
change. Alternately, an LT1019A can be used with four
times lower TC. If warm-up drift is of concern, these
measures will also help. With warm-up drift, total device
power dissipation must be considered. In the example
given, warm-up drift (worst case) is equal to:
7
LT1019
APPLICATIO S I FOR ATIO
U U W
U
The worst-case error in initial output voltage for the
LT1019 is 0.2%, so a series resistor is satisfactory if the
output is simply trimmed to nominal value. The maximum
TC shift expected would be 1ppm/°C.
capacitance and load. The 2.5V device can oscillate when
sinking currents between 1mA and 6mA for load capaci-
tance between 400pF and 2µF (see Figure 1).
If output bypassing is desired to reduce high frequency
output impedance, keep in mind that loop phase margin is
significantlyreducedforoutputcapacitors between500pF
and 1µF if the capacitor has low ESR (Effective Series
Resistance). This can make the output “ring” with tran-
Using the Temp Pin
The LT1019 has a TEMP pin like several other bandgap
references. The voltage on this pin is directly propor-
tional to absolute temperature (PTAT) with a slope of
approximately2.1mV/°C.Roomtemperaturevoltageis
therefore approximately (295°K)(2.1mV/°C) = 620mV.
This voltagevaries withprocess parameters andshould
not be used to measure absolute temperature, but
ratherrelativetemperaturechanges.Previous bandgap
references have been very sensitive to any loading on
the TEMP pin because it is an integral part of the
reference “core” itself. The LT1019 “taps” the core at a
special point which has much less effect on the refer-
ence. The relationship between TEMP pin loading and
a change in reference output voltage is less than
0.05%/µA,abouttentimes improvementoverprevious
references.
V
IN
V
IN
2Ω TO 5Ω
LT1019
LT1019
2Ω TO 5Ω
+
2µF TO 10µF
+
TANTALUM
2µF
TANTALUM
1019 F01
(a)
(b)
Figure 1. Output Bypassing
sient loads. The best transient load response is obtained
bydeliberatelyaddingaresistortoincreaseESRas shown
in Figure 1.
Use configuration (a) if DC voltage error cannot be com-
promised as load current changes. Use (b) if absolute
minimum peak perturbation at the load is needed. For best
transient response, the output can be loaded with ≥1mA
DC current.
Output Bypassing
The LT1019 is designed to be stable with a wide range of
load currents and output capacitors. The 4.5V, 5V, and
10V devices do not oscillate under any combination of
U
TYPICAL APPLICATIO S
Wide Range Trim ≥ ±5%
Narrow Trim Range (±0.2%)
V
OUT
OUT
V
OUT
OUT
V
IN
IN
LT1019
TRIM
GND
V
IN
IN
LT1019
TRIM
GND
R2*
1.5M
R1
25k
R1
100k
1019 TA03
*INCREASE TO 4.7M FOR LT1019A (±0.05%)
1019 TA05
8
LT1019
U
TYPICAL APPLICATIO S
Trimming LT1019-5 Output to 5.120V
Trimming LT1019-10 Output to 10.240V
V
OUT
V
OUT
OUT
OUT
90.9k
1%
41.2k
1%
V
IN
IN
V
IN
IN
LT1019-5
TRIM
LT1019-10
TRIM
5k*
±1% TRIM
5k*
±1% TRIM
GND
GND
4.02k
1%
4.02k
1%
*LOW TC CERMET
1019 TA06
*LOW TC CERMET
1019 TA04
Negative Series Reference
Precision 1µA Current Source
15V
+
V
11.5k
1%
OUT IN
LT1019
IN OUT
GND
R1*
LT1019-2.5
TRIM
5k*
D1*
8.25k
1%
GND
R2*
–V
IN
–V AT 50mA
REF
–
Q1
2N2905
2.49M
1%
V
OUT
LT1012
–
+
±11V COMPLIANCE
V
– V
REF
V – 5V
2mA
+
*R1 =
, R2 =
, D1 = V + 5V
REF
1mA
1019 TA10
I
= 1µA
OUT
Z
OUT
≥ 1011Ω
*LOW TC CERMET, TRIM RANGE = ±1.5%
1019 TA07
Output Current Boost with Current Limit
+
V ≥ (V
OUT
+ 2.8V)
LED
GLOWS IN
CURRENT LIMIT
(DO NOT OMIT)
R1
220Ω
8.2Ω
2N2905
IN
LT1019
OUT
GND
I
≤ 100mA
LOAD
2µF SOLID TANTALUM
1019 TA08
9
LT1019
W
W
SCHE ATIC DIAGRA
10
LT1019
U
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTIO
H Package
8-Lead TO-5 Metal Can (0.200 PCD)
(LTC DWG # 05-08-1320)
0.335 – 0.370
(8.509 – 9.398)
DIA
0.027 – 0.045
(0.686 – 1.143)
45°TYP
PIN 1
0.305 – 0.335
(7.747 – 8.509)
0.040
0.028 – 0.034
(0.711 – 0.864)
0.050
(1.270)
MAX
(1.016)
MAX
0.200
(5.080)
TYP
0.165 – 0.185
(4.191 – 4.699)
REFERENCE
PLANE
SEATING
PLANE
GAUGE
PLANE
0.500 – 0.750
(12.700 – 19.050)
0.110 – 0.160
(2.794 – 4.064)
INSULATING
STANDOFF
0.010 – 0.045*
(0.254 – 1.143)
0.016 – 0.021**
(0.406 – 0.533)
*LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE
AND 0.045" BELOW THE REFERENCE PLANE
0.016 – 0.024
**FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS
(0.406 – 0.610)
H8(TO-5) 0.200 PCD 1197
N8 Package
8-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.400*
(10.160)
MAX
0.130 ± 0.005
0.300 – 0.325
0.045 – 0.065
(1.143 – 1.651)
(3.302 ± 0.127)
(7.620 – 8.255)
8
7
6
5
0.065
(1.651)
TYP
0.255 ± 0.015*
(6.477 ± 0.381)
0.009 – 0.015
0.125
(0.229 – 0.381)
0.020
(3.175)
MIN
+0.035
–0.015
(0.508)
MIN
1
2
4
3
0.325
0.018 ± 0.003
0.100
(2.54)
BSC
+0.889
–0.381
(0.457 ± 0.076)
8.255
(
)
N8 1098
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.189 – 0.197*
(4.801 – 5.004)
0.010 – 0.020
(0.254 – 0.508)
7
5
8
6
× 45°
0.053 – 0.069
(1.346 – 1.752)
0.004 – 0.010
0.008 – 0.010
(0.203 – 0.254)
(0.101 – 0.254)
0°– 8° TYP
0.150 – 0.157**
(3.810 – 3.988)
0.228 – 0.244
(5.791 – 6.197)
0.016 – 0.050
(0.406 – 1.270)
0.050
(1.270)
BSC
0.014 – 0.019
(0.355 – 0.483)
TYP
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
1
3
4
2
SO8 1298
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tationthattheinterconnectionofits circuits as describedhereinwillnotinfringeonexistingpatentrights.
11
LT1019
U
TYPICAL APPLICATION
Negative 10V Reference for CMOS DAC
OUT
59k
1%
LT1019-10
TRIM
5k*
FB
I
GND
30pF
5.76k
1%
–
LTC1595
OUT
REF
V
OUT
LT1007
+
1.2k
*LOW TC CERMET, TRIM RANGE = ±1.5%
–15V
1019 TA09
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1027
Precision 5V Reference
Lowest TC, High Accuracy, Low Noise, Zener Based
5V and 10V Zener Based, 5ppm/°C, SO-8 Package
Bandgap, 130µA Supply Current, 10ppm/°C, Available in SOT-23 Package
Bandgap 0.05%, 10ppm/°C, 10µA Supply Current
0.15% Max, 6.5µA Supply Current
LT1236
Precision Reference
LT1460
Micropower Precision Series Reference
Micropower Precision Shunt Reference
Micropower Low Dropout Reference
Micropower Low Dropout Reference
LT1634
LTC1798
LT1461
3ppm/°C, 0.04%, 50µA Supply Current
1019fc LT/TP 1299 2K REV C • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1993
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
12
●
●
(408)432-1900 FAX:(408)434-0507 www.linear-tech.com
相关型号：
LT1019AMH-5/883
IC 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 5 V, MBCY8, 0.200 INCH, METAL CAN, TO-5, 8 PIN, Voltage Reference
Linear
LT1019CN8-10#PBF
LT1019 - Precision Reference; Package: PDIP; Pins: 8; Temperature Range: 0°C to 70°C
Linear
©2020 ICPDF网 联系我们和版权申明