LTC2053-SYNC [Linear]
Precision, Rail-to-Rail,Zero-Drift, Resistor-Programmable Instrumentation Amplifier; 精密，轨到轨，零漂移，电阻可编程仪表放大器
| 型号： | LTC2053-SYNC |
| 厂家： | 
Linear |
| 描述： | Precision, Rail-to-Rail,Zero-Drift, Resistor-Programmable Instrumentation Amplifier |
| 文件： | 总16页 (文件大小：228K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTC2053/LTC2053-SYNC
Precision, Rail-to-Rail,
Zero-Drift, Resistor-Programmable
Instrumentation Amplifier
U
FEATURES
DESCRIPTIO
The LTC®2053 is a high precision instrumentation ampli-
fier. The CMRR is typically 116dB with a single or dual 5V
supply and is independent of gain. The input offset voltage
is guaranteed below 10µV with a temperature drift of less
than 50nV/°C. The LTC2053 is easy to use; the gain is
adjustable with two external resistors, like a traditional
op amp.
■
116dB CMRR Independent of Gain
■
Maximum Offset Voltage: 10µV
■
Maximum Offset Voltage Drift: 50nV/°C
Rail-to-Rail Input
Rail-to-Rail Output
■
■
■
2-Resistor Programmable Gain
Supply Operation: 2.7V to ±5.5V
■
■
Typical Noise: 2.5µVP-P (0.01Hz to 10Hz)
The LTC2053 uses charge balanced sampled data tech-
niques to convert a differential input voltage into a single
ended signal that is in turn amplified by a zero-drift
operational amplifier.
■
Typical Supply Current: 750µA
■
LTC2053-SYNC Allows Synchronization to
External Clock
■
Available in MS8 and 3mm × 3mm × 0.8mm
The differential inputs operate from rail-to-rail and the
singleendedoutputswingsfromrail-to-rail. TheLTC2053
can be used in single supply applications, as low as 2.7V.
Itcanalsobeusedwithdual±5.5Vsupplies. TheLTC2053
requires no external clock, while the LTC2053-SYNC has
a CLK pin to synchronize to an external clock.
DFN Packages
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APPLICATIO S
■
Thermocouple Amplifiers
■
Electronic Scales
■
The LTC2053 is available in an MS8 surface mount pack-
age. For space limited applications, the LTC2053 is avail-
able in a 3mm × 3mm × 0.8mm dual fine pitch leadless
package (DFN).
Medical Instrumentation
■
Strain Gauge Amplifiers
■
High Resolution Data Acquisition
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
U
TYPICAL APPLICATIO
Typical Input Referred Offset vs Input
Common Mode Voltage (VS = 3V)
Differential Bridge Amplifier
3V
15
V
V
T
= 3V
REF
= 25°C
S
0.1µF
= 0V
10
5
A
R < 10k
8
2
–
7
OUT
LTC2053
3
0
6
+
G = 1000
G = 10
R2 10k
5
G = 100
G = 1
1, 4
–5
–10
–15
R2
R1
GAIN = 1+
0.1µF
R1
10Ω
0
1.0
1.5
2.0
2.5
3.0
0.5
2053 TA01
INPUT COMMON MODE VOLTAGE (V)
2053 TA01b
2053syncfb
1
LTC2053/LTC2053-SYNC
W W
ABSOLUTE AXI U RATI GS
(Note 1)
U W
Total Supply Voltage (V+ to V–) ............................... 11V
Input Current ...................................................... ±10mA
⏐VIN+ – VREF⏐ ........................................................ 5.5V
⏐VIN– – VREF⏐ ........................................................ 5.5V
Output Short Circuit Duration .......................... Indefinite
Operating Temperature Range
LTC2053I, LTC2053I-SYNC ................ –40°C to 85°C
LTC2053H ........................................ –40°C to 125°C
Storage Temperature Range
MS8 Package ................................... –65°C to 150°C
DD Package ...................................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
LTC2053C, LTC2053C-SYNC................... 0°C to 70°C
U
W
U
PACKAGE/ORDER I FOR ATIO
ORDER PART NUMBER
ORDER PART NUMBER
TOP VIEW
LTC2053CMS8
LTC2053IMS8
LTC2053HMS8
LTC2053CDD
LTC2053IDD
LTC2053HDD
+
EN
–IN
+IN
1
2
3
4
8
7
6
5
V
TOP VIEW
OUT
RG
REF
+
EN/CLK†
–IN
1
2
3
4
8 V
7 OUT
6 RG
5 REF
–
+IN
V
–
LTC2053CMS8-SYNC
LTC2053IMS8-SYNC
V
DD PART MARKING
*LAEQ
MS8 PACKAGE
8-LEAD PLASTIC MSOP
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
T
= 150°C, θ = 200°C/W
JA
†PIN 1 IS EN ON LTC2053,
CLK ON LTC2053-SYNC
JMAX
MS8 PART MARKING
T
= 125°C, θ = 160°C/W
JA
UNDERSIDE METAL INTERNALLY
JMAX
–
LTVT
LTJY
LTAFB
CONNECTED TO V
(PCB CONNECTION OPTIONAL)
*LTBNP
*The temperature grade (C, I, or H) is indicated on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. V+ = 3V, V– = 0V, REF = 200mV. Output voltage swing is referenced
to V–. All other specifications reference the OUT pin to the REF pin.
PARAMETER
Gain Error
CONDITIONS
A = 1
MIN
TYP
MAX
UNITS
●
0.001
0.01
%
V
Gain Nonlinearity
A = 1, LTC2053
A = 1, LTC2053-SYNC
V
●
●
3
3
12
15
ppm
ppm
V
Input Offset Voltage (Note 2)
V
= 200mV
–5
±10
µV
CM
Average Input Offset Drift (Note 2)
T = –40°C to 85°C
T = 85°C to 125°C
A
●
●
±50
–2.5
nV/°C
µV/°C
A
–1
4
Average Input Bias Current (Note 3)
Average Input Offset Current (Note 3)
Input Noise Voltage
V
V
= 1.2V
= 1.2V
●
●
10
3
nA
nA
CM
CM
1
DC to 10Hz
A = 1, V = 0V to 3V, LTC2053C, LTC2053C-SYNC
2.5
µV
P-P
Common Mode Rejection Ratio
(Notes 4, 5)
●
●
●
●
●
100
100
95
100
85
113
113
113
dB
dB
dB
dB
dB
V
CM
A = 1, V = 0.1V to 2.9V, LTC2053I, LTC2053I-SYNC
V
CM
A = 1, V = 0V to 3V, LTC2053I, LTC2053I-SYNC
V
CM
A = 1, V = 0.1V to 2.9V, LTC2053H
V
CM
A = 1, V = 0V to 3V, LTC2053H
V
CM
2053syncfb
2
LTC2053/LTC2053-SYNC
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. V+ = 3V, V– = 0V, REF = 200mV. Output voltage swing is referenced
to V–. All other specifications reference the OUT pin to the REF pin.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Power Supply Rejection Ratio (Note 6)
Output Voltage Swing High
V = 2.7V to 6V
●
110
116
dB
S
–
R = 2k to V
L
●
●
2.85
2.95
2.94
2.98
V
V
–
R = 10k to V
L
Output Voltage Swing Low
Supply Current
●
●
20
1
mV
mA
µA
No Load
0.75
Supply Current, Shutdown
V
V
≥ 2.5V, LTC2053 Only
10
0.5
EN
EN/CLK Pin Input Low Voltage, V
V
IL
EN/CLK Pin Input High Voltage, V
EN/CLK Pin Input Current
Internal Op Amp Gain Bandwidth
Slew Rate
2.5
V
IH
–
= V
–0.5
200
0.2
3
–10
µA
EN/CLK
kHz
V/µs
kHz
Internal Sampling Frequency
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. V+ = 5V,
V– = 0V, REF = 200mV. Output voltage swing is referenced to V–. All other specifications reference the OUT pin to the REF pin.
PARAMETER
CONDITIONS
A = 1
MIN
TYP
0.001
3
MAX
0.01
10
UNITS
%
Gain Error
●
●
V
Gain Nonlinearity
A = 1
V
ppm
µV
Input Offset Voltage (Note 2)
Average Input Offset Drift (Note 2)
V
= 200mV
–5
±10
CM
T = –40°C to 85°C
●
●
±50
–2.5
nV/°C
µV/°C
A
T = 85°C to 125°C
A
–1
4
Average Input Bias Current (Note 3)
Average Input Offset Current (Note 3)
V
V
= 1.2V
= 1.2V
●
●
10
3
nA
nA
CM
CM
1
Common Mode Rejection Ratio
(Notes 4, 5)
A = 1, V = 0V to 5V, LTC2053C
●
●
●
●
●
●
●
105
100
105
100
95
100
85
116
116
116
116
116
dB
dB
dB
dB
dB
dB
dB
V
CM
A = 1, V = 0V to 5V, LTC2053C-SYNC
V
CM
A = 1, V = 0.1V to 4.9V, LTC2053I
V
CM
A = 1, V = 0.1V to 4.9V, LTC2053I-SYNC
V
CM
A = 1, V = 0V to 5V, LTC2053I, LTC2053I-SYNC
V
CM
A = 1, V = 0.1V to 4.9V, LTC2053H
V
CM
A = 1, V = 0V to 5V, LTC2053H
V
CM
Power Supply Rejection Ratio (Note 6)
Output Voltage Swing High
V = 2.7V to 6V
●
110
116
dB
S
–
R = 2k to V
L
●
●
4.85
4.95
4.94
4.98
V
V
–
R = 10k to V
L
Output Voltage Swing Low
Supply Current
●
●
20
1.1
10
mV
mA
µA
No Load
0.85
Supply Current, Shutdown
V
V
≥ 4.5V, LTC2053 Only
EN
EN/CLK Pin Input Low Voltage, V
0.5
V
IL
EN/CLK Pin Input High Voltage, V
EN/CLK Pin Input Current
Internal Op Amp Gain Bandwidth
Slew Rate
4.5
V
IH
–
= V
–1
200
0.2
3
–10
µA
EN/CLK
kHz
V/µs
kHz
Internal Sampling Frequency
2053syncfb
3
LTC2053/LTC2053-SYNC
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. V+ = 5V, V– = –5V, REF = 0V.
PARAMETER
CONDITIONS
A = 1
MIN
TYP
0.001
3
MAX
0.01
10
UNITS
%
Gain Error
●
●
V
Gain Nonlinearity
A = 1
V
ppm
µV
Input Offset Voltage (Note 2)
Average Input Offset Drift (Note 2)
V
= 0V
10
±20
CM
T = –40°C to 85°C
●
●
±50
–2.5
nV/°C
µV/°C
A
T = 85°C to 125°C
A
–1
4
Average Input Bias Current (Note 3)
Average Input Offset Current (Note 3)
V
V
= 1V
= 1V
●
●
10
3
nA
nA
CM
CM
1
Common Mode Rejection Ratio
(Notes 4, 5)
(Notes 4, 5)
A = 1, V = –5V to 5V, LTC2053C
●
●
●
●
●
●
●
105
100
105
100
95
118
118
118
118
118
dB
dB
dB
dB
dB
dB
dB
V
CM
A = 1, V = –5V to 5V, LTC2053C-SYNC
V
CM
A = 1, V = –4.9V to 4.9V, LTC2053I
V CM
A = 1, V = –4.9V to 4.9V, LTC2053I-SYNC
V
CM
A = 1, V = –5V to 5V, LTC2053I, LTC2053I-SYNC
V
CM
A = 1, V = –4.9V to 4.9V, LTC2053H
100
90
V
CM
A = 1, V = –5V to 5V, LTC2053H
V
CM
Power Supply Rejection Ratio (Note 6)
Maximum Output Voltage Swing
V = 2.7V to 11V
●
110
116
dB
S
R = 2k to GND, C and I Grades
●
●
●
±4.5
±4.6
±4.4
±4.8
±4.9
±4.8
V
V
V
L
R = 10k to GND, All Grades
L
R = 2k to GND, LTC2053H Only
L
Supply Current
No Load
●
0.95
1.3
20
mA
µA
V
Supply Current, Shutdown
V
≥ 4.5V, LTC2053 Only
EN
EN Pin Input Low Voltage, V
–4.5
0.5
IL
CLK Pin Input Low Voltage, V
V
IL
EN/CLK Pin Input High Voltage, V
EN/CLK Pin Input Current
Internal Op Amp Gain Bandwidth
Slew Rate
4.5
V
IH
–
V
= V
–3
200
0.2
3
–20
µA
kHz
V/µs
kHz
EN/CLK
Internal Sampling Frequency
Note 4: The CMRR with a voltage gain, A , larger than 10 is 120dB (typ).
Note 1: Absolute Maximum Ratings are those values beyond which the life
V
of a device may be impaired.
Note 2: These parameters are guaranteed by design. Thermocouple effects
preclude measurement of these voltage levels in high speed automatic test
Note 5: At temperatures above 70°C, the common mode rejection ratio
lowers when the common mode input voltage is within 100mV of the
supply rails.
systems. V is measured to a limit determined by test equipment
capability.
Note 3: If the total source resistance is less than 10k, no DC errors result
from the input bias currents or the mismatch of the input bias currents or
the mismatch of the resistances connected to –IN and +IN.
Note 6: The power supply rejection ratio (PSRR) measurement accuracy
depends on the proximity of the power supply bypass capacitor to the
device under test. Because of this, the PSRR is 100% tested to relaxed
limits at final test. However, their values are guaranteed by design to meet
the data sheet limits.
OS
2053syncfb
4
LTC2053/LTC2053-SYNC
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Input Offset Voltage vs Input
Input Offset Voltage vs Input
Common Mode Voltage
Input Offset Voltage vs Input
Common Mode Voltage
Common Mode Voltage
15
10
5
20
15
15
10
5
V
V
T
= 5V
REF
= 25°C
V
V
T
= ±5V
REF
= 25°C
V
V
T
= 3V
REF
= 25°C
S
S
S
= 0V
= 0V
= 0V
A
A
A
10
G=1000
G=10
G = 1000
5
G=1
0
0
0
G = 1000
G = 10
G=100
G = 100
G = 1
–5
–10
–15
–20
G = 100
G = 1
–5
–10
–15
–5
–10
–15
G = 10
0
2
3
4
5
1
–5
–1
1
3
5
0
1.0
1.5
2.0
2.5
3.0
–3
0.5
INPUT COMMON MODE VOLTAGE (V)
INPUT COMMON MODE VOLTAGE (V)
INPUT COMMON MODE VOLTAGE (V)
2053 G02
2053 G03
2053 G01
Input Offset Voltage vs Input
Common Mode Voltage
Input Offset Voltage vs Input
Common Mode Voltage
Input Offset Voltage vs Input
Common Mode Voltage
20
15
20
15
20
15
V
V
= ±5V
REF
V
V
= 3V
REF
V
V
= 5V
REF
S
S
S
= 0V
= 0V
= 0V
G = 10
G = 10
G = 10
10
10
10
T
= 25°C
A
T
= 85°C
= 25°C
5
5
5
A
T
= 85°C
T
= 70°C
A
A
0
0
0
T
= 70°C
T
= 85°C
A
A
–5
–10
–15
–20
–5
–10
–15
–20
–5
–10
–15
–20
T
T
= 25°C
A
A
T
= –55°C
A
T
= 70°C
A
T
A
= –55°C
T
= –55°C
A
–5
–1
1
3
5
–3
0
1.0
1.5
2.0
2.5
3.0
0.5
0
2
3
4
5
1
INPUT COMMON MODE VOLTAGE (V)
INPUT COMMON MODE VOLTAGE (V)
INPUT COMMON MODE VOLTAGE (V)
2053 G06
2053 G04
2053 G05
Input Offset Voltage vs Input
Common Mode Voltage
Input Offset Voltage vs Input
Common Mode Voltage
Input Offset Voltage vs Input
Common Mode Voltage
60
40
60
40
100
80
H-GRADE PARTS
H-GRADE PARTS
H-GRADE PARTS
V
V
= 3V
REF
G = 10
V
V
= 5V
REF
G = 10
S
S
V
V
= ±5V
REF
G = 10
S
= 0V
= 0V
= 0V
60
40
20
20
20
T
= 85°C
A
0
0
0
T
= 85°C
T
= 25°C
A
T
= 85°C
A
A
–20
–40
–60
–80
–100
T
= 25°C
A
T
= 25°C
A
–20
–40
–60
–20
–40
–60
T
= 125°C
A
T
= 125°C
A
T
= 125°C
A
0
1.0
1.5
2.0
2.5
3.0
0.5
0
2
3
4
5
1
–5
–1
1
3
5
–3
INPUT COMMON MODE VOLTAGE (V)
INPUT COMMON MODE VOLTAGE (V)
INPUT COMMON MODE VOLTAGE (V)
2053 G07
2053 G08
2053 G09
2053syncfb
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LTC2053/LTC2053-SYNC
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Error Due to Input RS vs Input
Common Mode (CIN < 100pF)
Error Due to Input RS vs Input
Common Mode (CIN < 100pF)
Error Due to Input RS vs Input
Common Mode (CIN < 100pF)
30
20
60
40
25
20
V
V
= 3V
V
V
= 5V
V
V
= ±5V
S
S
S
R
= 20k
= 0V
= 0V
= 0V
REF
S
REF
REF
+
–
+
–
+
–
R
= 20k
S
R
= R = R
R
= R = R
R = R = R
S
S
S
15
C
< 100pF
C
< 100pF
C
< 100pF
IN
IN
G = 10
= 25°C
IN
G = 10
= 25°C
G = 10
T = 25°C
A
10
R
S
= 15k
= 10k
R
= 15k
S
10
20
T
T
R
S
= 5k
A
A
5
R
= 10k
S
R
= 0k
S
0
0
0
R
= 5k
S
R
S
R
S
= 10k
–5
–10
–20
–30
–20
–40
–60
R
= 15k
–10
–15
–20
–25
R
S
S
+
–
R
S
= 20k
SMALL C
IN
R
S
0
2
3
4
5
–5
–3
–1
1
3
5
1
0
1.0
1.5
2.0
2.5
3.0
0.5
INPUT COMMON MODE VOLTAGE (V)
INPUT COMMON MODE VOLTAGE (V)
INPUT COMMON MODE VOLTAGE (V)
2053 G11
2053 G12
2053 G10
Error Due to Input RS Mismatch
vs Input Common Mode
(CIN < 100pF)
Error Due to Input RS Mismatch
vs Input Common Mode
(CIN < 100pF)
Error Due to Input RS Mismatch
vs Input Common Mode
(CIN < 100pF)
40
30
40
30
50
40
+
–
V
V
C
= 5V
REF
V
V
C
= ±5V
S
V
V
C
= 3V
R
= 0k, R = 20k
IN
S
S
IN
+
–
= 0V
= 0V
REF
= 0V
REF
< 100pF
R
= 0k, R = 20k
+
–
R
–
= 0k, R = 15k
< 100pF
< 100pF
IN
G = 10
IN
IN
30
+
–
G = 10
G = 10
= 25°C
R
= 0k, R = 15k
IN
20
20
IN
T
A
= 25°C
T = 25°C
A
T
A
20
+
+
–
R
= 0k, R = 10k
–
R
= 0k, R = 15k
+
–
10
10
R
= 0k, R = 10k
IN
+
IN
10
R
+
= 0k, R = 5k
0
0
0
+
–
–
–10
–20
–30
–40
–50
R
=10k, R = 0k
R
+
= 5k, R = 0k
= 10k, R = 0k
IN
IN
+
–
–10
–20
–30
–40
–10
–20
–30
–40
R
=15k, R = 0k
+
–
R
R
+
–
R
=15k, R = 0k
IN
IN
+
–
+
–
R
=20k, R = 0k
SMALL C
IN
+
–
–
R
=20k, R = 0k
IN
+
–
IN
R
R
=15k, R = 0k
2.0 2.5 3.0
0
2
3
4
5
–5
–3
–1
1
3
5
1
0
1.0
1.5
0.5
INPUT COMMON MODE VOLTAGE (V)
INPUT COMMON MODE VOLTAGE (V)
INPUT COMMON MODE VOLTAGE (V)
2053 G14
2053 G15
2053 G13
Error Due to Input RS vs Input
Common Mode (CIN > 1µF)
Error Due to Input RS vs Input
Common Mode (CIN > 1µF)
Error Due to Input RS vs Input
Common Mode (CIN > 1µF)
70
50
40
30
80
60
V
V
= 5V
V
V
R
C
= 3V
S
V
V
R
C
= ±5V
S
S
R
= 10k
R
= 10k
= 0V
S
= 0V
S
REF
= 0V
REF
REF
+
–
+
–
+
–
R
= 15k
R
C
= R = R
= R = R
S
S
= R = R
S
S
> 1µF
> 1µF
IN
> 1µF
IN
IN
R
S
= 5k
20
40
R
= 5k
S
G = 10
G = 10
30
G = 10
T
A
= 25°C
T
= 25°C
T
= 25°C
A
A
R
= 10k
10
20
S
R
= 1k
S
10
R
S
= 1k
S
0
0
R
= 5k
R
= 500Ω
S
S
R
= 500Ω
–10
–30
–50
–70
–10
–20
–30
–40
–20
–40
–60
–80
R
S
+
–
BIG C
IN
R
S
0
2
3
4
5
1
0
1.0
1.5
2.0
2.5
3.0
–5
–1
1
3
5
0.5
–3
INPUT COMMON MODE VOLTAGE (V)
INPUT COMMON MODE VOLTAGE (V)
INPUT COMMON MODE VOLTAGE (V)
2053 G17
2053 G16
2053 G18
2053syncfb
6
LTC2053/LTC2053-SYNC
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Error Due to Input RS Mismatch
vs Input Common Mode
(CIN >1µF)
Error Due to Input RS Mismatch
vs Input Common Mode
(CIN >1µF)
Error Due to Input RS Mismatch
vs Input Common Mode
(CIN >1µF)
200
150
100
50
200
150
100
50
150
100
50
V
V
T
= 3V
REF
= 25°C
V
V
T
= ±5V
S
S
V
V
T
= 5V
REF
= 25°C
S
+
–
= 0V
= 0V
REF
= 0V
R
= 0k, R = 1k
+
–
+
–
= 25°C
A
A
R = 0k, R = 1k
–
R
–
= 0k, R = 1k
A
+
–
+
+
R
= 0k, R = 500Ω
R
= 0k, R = 500Ω
R
= 0k, R = 500Ω
+
–
+
–
+
–
R
= 0k, R = 100Ω
R
= 0k, R = 100Ω
R
= 0k, R = 100Ω
0
0
0
+
–
+
–
R
= 100Ω, R = 0k
R
= 100Ω, R = 0k
+
–
50
–50
–100
–150
–200
R
= 100Ω, R = 0k
+
–
+
–50
–100
–150
R
= 500Ω, R = 0k
+
–
R
R
= 500Ω, R = 0k
+
–
R
= 500Ω, R = 0k
–100
–150
–200
+
+
–
BIG C
+
–
IN
+
–
R
=1k, R = 0k
R
=1k, R = 0k
R
=1k, R = 0k
–
–
R
0
1.0
1.5
2.0
2.5
3.0
125
1.6
0
2
3
4
5
0.5
1
–5
–1
1
3
5
–3
INPUT COMMON MODE VOLTAGE (V)
INPUT COMMON MODE VOLTAGE (V)
INPUT COMMON MODE VOLTAGE (V)
2053 G20
2053 G19
2053 G21
VOS vs REF (Pin 5)
Offset Voltage vs Temperature
V
OS vs REF (Pin 5)
80
60
60
40
30
20
+
–
+
–
V
= V = REF
IN
V
= V = REF
IN
IN
G = 10
= 25°C
IN
G = 10
TA = 25°C
T
A
40
V
= 5V
20
10
S
20
V
= ±5V
S
0
0
0
V
= 5V
V
= 3V
V
S
= 10V
S
S
V
S
= 3V
–20
–40
–60
–80
–20
–40
–60
–10
–20
–30
–25
0
25
50
75
–50
100
7
8
9
0
2
3
4
0
1
2
3
4
5
6
1
V
(V)
V
(V)
TEMPERATURE (°C)
REF
REF
2053 G24
2053 G22
2053 G23
Gain Nonlinearity, G = 1
Gain Nonlinearity, G = 10
CMRR vs Frequency
10
8
10
8
130
120
110
100
90
V
V
= ±2.5V
V
V
= 3V, 5V, ±5V
V
V
= ±2.5V
S
S
IN
S
= 0V
= 1V
= 0V
REF
P-P
REF
G = 1
G = 10
6
6
+
+
–
R
T
= 10k
= 25°C
R
= R = 1k
R
T
= 10k
= 25°C
L
L
A
4
A
4
2
2
–
R
= R = 10k
0
0
+
–
–2
–4
–6
–8
–10
–2
–4
–6
–8
–10
R
= 10k, R = 0k
+
R
+
80
–
+
–
R
= 0k, R = 10k
–
R
70
–2.4
–0.4
0.6 1.1
–1.9 –1.4 –0.9
0.1
–2.4
–0.4
0.6
–1.4
1.6
2.6
1
10
100
1000
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
FREQUENCY (Hz)
2053 G25
2053 G26
2053 G27
2053syncfb
7
LTC2053/LTC2053-SYNC
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Input Referred Noise in 10Hz
Bandwidth
Input Voltage Noise Density vs
Frequency
Input Referred Noise in 10Hz
Bandwidth
3
2
300
250
200
150
100
50
3
2
G = 10
V
T
= 3V
= 25°C
V
T
= 5V
= 25°C
S
S
T
= 25°C
A
A
A
V
= ±5V
S
1
1
V
= 5V
= 3V
S
0
0
V
S
–1
–2
–3
–1
–2
–3
0
0
2
4
6
8
10
1
10
100
FREQUENCY (Hz)
1000
10000
0
2
4
6
8
10
TIME (s)
TIME (s)
2053 G29
2053 G28
2053 G30
Output Voltage Swing vs Output
Current
Output Voltage Swing vs Output
Current
Supply Current vs Supply Voltage
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
5
4
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
T
= 25°C
V
= 5V, SOURCING
A
V
= ±5V
= 25°C
S
SOURCING
S
A
T
T
= 125°C
A
3
2
V
= 3V, SOURCING
S
1
T
= 85°C
A
0
T
= 0°C
A
–1
–2
–3
–4
–5
T
= –55°C
A
V
= 3V, SINKING
S
V
= 5V, SINKING
S
SINKING
0.01
1
10
0.1
6.5
SUPPLY VOLTAGE (V)
2.5
4.5
8.5
10.5
0.01
1
10
0.1
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
2053 G31
2053 G33
2053 G32
Internal Clock Frequency vs
Supply Voltage
Low Gain Settling Time vs
Settling Accuracy
Settling Time vs Gain
3.40
3.35
3.30
3.25
3.20
3.15
3.10
35
30
25
20
15
10
5
8
7
6
5
4
3
2
1
V
= 5V
OUT
V = 5V
S
S
dV
= 1V
dV
= 1V
OUT
0.1% ACCURACY
T = 25°C
A
G < 100
= 25°C
T
A
T
= 125°C
A
T
= 85°C
A
T
= –55°C
T
= 25°C
A
A
0
0
6.5
SUPPLY VOLTAGE (V)
2.5
4.5
8.5
10.5
1
10
100
1000
10000
0.01
0.001
SETTLING ACCURACY (%)
0.0001
0.1
GAIN (V/V)
2053 G35
2053 G36
2053 G34
2053syncfb
8
LTC2053/LTC2053-SYNC
U
U
U
PI FU CTIO S
EN (Pin 1, LTC2053 Only): Active Low Enable Pin.
RG (Pin 6): Inverting Input of Internal Op Amp. With a
resistor, R2, connected between the OUT pin and the RG
pinandaresistor, R1, betweentheRGpinandtheREFpin,
the DC gain is given by 1 + R2 / R1.
CLK (Pin 1, LTC2053-SYNC Only): Clock input for
synchronizing to external system clock.
–IN (Pin 2): Inverting Input.
OUT (Pin 7): Amplifier Output.
+IN (Pin 3): Noninverting Input.
V– (Pin 4): Negative Supply.
V
OUT = GAIN (V+IN – V–IN) + VREF
V+ (Pin 8): Positive Supply.
REF (Pin 5): VoltageReference(VREF)forAmplifierOutput.
W
BLOCK DIAGRA
8
+
V
ZERO-DRIFT
OP AMP
+IN
3
+
OUT
7
C
C
H
S
–IN
2
–
–
REF
RG
V
EN/CLK*
5
6
4
1
2053 BD
*NOTE: PIN 1 IS EN ON THE LTC2053 AND CLK ON THE LTC2053-SYNC.
U
W U U
APPLICATIO S I FOR ATIO
Theory of Operation
Where V+IN and V–IN are the voltages of the +IN and –IN
pins respectively, VREF is the voltage at the REF pin and V+
is the positive supply voltage.
The LTC2053 uses an internal capacitor (CS) to sample a
differential input signal riding on a DC common mode
voltage (see Block Diagram). This capacitor’s charge is
transferred to a second internal hold capacitor (CH) trans-
lating the common mode of the input differential signal to
that of the REF pin. The resulting signal is amplified by a
zero-drift op amp in the noninverting configuration. The
RG pin is the negative input of this op amp and allows
external programmability of the DC gain. Simple filtering
can be realized by using an external capacitor across the
feedback resistor.
For example, with a 3V single supply and a 0V to 100mV
differential input voltage, VREF must be between 0V and
1.6V.
±5 Volt Operation
When using the LTC2053 with supplies over 5.5V, care
must be taken to limit the maximum difference between
any of the input pins (+IN or –IN) and the REF pin to 5.5V;
if not, the device will be damaged. For example, if rail-to-
rail input operation is desired when the supplies are at
±5V, the REF pin should be 0V, ±0.5V. As a second
example, if V+ is 10V and V– and REF are at 0V, the inputs
should not exceed 5.5V.
Input Voltage Range
The input common mode voltage range of the LTC2053 is
rail-to-rail. However, the following equation limits the size
of the differential input voltage:
V– ≤ (V+IN – V–IN) + VREF ≤ V+ – 1.3
2053syncfb
9
LTC2053/LTC2053-SYNC
U
W
U U
APPLICATIO S I FOR ATIO
Settling Time
charging current decays exponentially during each input
sampling period with a time constant equal to RSCS. If the
voltage disturbance due to these currents settles before
the end of the sampling period, there will be no errors
due to source resistance or the source resistance mis-
match between –IN and +IN. With RS less than 10k, no
DC errors occur due to this input current.
The sampling rate is 3kHz and the input sampling period
during which CS is charged to the input differential voltage
VIN is approximately 150µs. First assume that on each
input sampling period, CS is charged fully to VIN. Since CS
= CH (= 1000pF), a change in the input will settle to N bits
of accuracy at the op amp noninverting input after N clock
cyclesor333µs(N). ThesettlingtimeattheOUTpinisalso
affected by the settling of the internal op amp. Since the
gain bandwidth of the internal op amp is typically 200kHz,
the settling time is dominated by the switched capacitor
front end for gains below 100 (see Typical Performance
Characteristics).
In the Typical Performance Characteristics section of this
data sheet, there are curves showing the additional error
from non-zero source resistance in the inputs. If there are
no large capacitors across the inputs, the amplifier is less
sensitive to source resistance and source resistance mis-
match. When large capacitors are placed across the in-
puts,theinputchargingcurrentsdescribedaboveresultin
larger DC errors, especially with source resistor mis-
matches.
Input Current
Whenever the differential input VIN changes, CH must be
charged up to the new input voltage via CS. This results in
an input charging current during each input sampling
period. Eventually, CH and CS will reach VIN and, ideally,
the input current would go to zero for DC inputs.
Power Supply Bypassing
TheLTC2053usesasampleddatatechniqueandtherefore
contains some clocked digital circuitry. It is therefore
sensistive to supply bypassing. For single or dual supply
operation, a 0.1µF ceramic capacitor must be connected
between Pin 8 (V+) and Pin 4 (V–) with leads as short as
possible.
In reality, there are additional parasitic capacitors which
disturb the charge on CS every cycle even if VIN is a DC
voltage. For example, the parasitic bottom plate capacitor
on CS must be charged from the voltage on the REF pin to
the voltage on the –IN pin every cycle. The resulting input
SINGLE SUPPLY, UNITY GAIN
5V
DUAL SUPPLY
5V
8
8
3
3
V
+
–
V
V
+
+IN
+IN
+
+
7
7
V
V
OUT
V
V
D
–
OUT
D
6
6
2
2
R2
–
V
–
5
5
–IN
–IN
4
4
R1
–5V
V
REF
0V < V < 5V
–5V < V < 5V AND ⏐V – V ⏐ < 5.5V
–IN –IN REF
+IN
0V < V < 5V
–5V < V < 5V AND ⏐V – V ⏐ < 5.5V
–IN
+IN +IN REF
0V < V < 3.7V
–5V < V + V
< 3.7V
D
D
REF
R2
V
= V
OUT
D
V
= 1 +
V + V
D REF
OUT
(
)
2053 F01
R1
Figure 1
2053syncfb
10
LTC2053/LTC2053-SYNC
U
W
U U
APPLICATIO S I FOR ATIO
Synchronizing to an External Clock
(LTC2053-SYNC Only)
The LTC2053 has an internally generated sample clock
that is typically 3kHz. There is no need to provide the
LTC2053 with a clock. However, in some applications, it
may be desirable for the user to control the sampling
frequency more precisely to avoid undesirable aliasing.
This can be done with the LTC2053-SYNC. This device
uses PIN 1 as a clock input whereas the LTC2053 uses Pin
1 as an enable pin. If CLK (PIN 1) is left floating on the
LTC2053-SYNC, the device will run on its internal oscilla-
tor, similar to the LTC2053. However, if not externally
synchronizing to a system clock, it is recommended that
the LTC2053 be used instead of the LTC2053-SYNC
because the LTC2053-SYNC is sensitive to parasitic ca-
pacitance on the CLK pin when left floating. Clocking the
LTC2053-SYNC is accomplished by driving the CLK pin
at 8 times the desired sample clock frequency. This
completely disables the internal clock. For example, to
achievethenominalLTC2053sampleclockrateof3kHz,
a 24kHz external clock should be applied to the CLK pin
oftheLTC2053-SYNC.Ifasquarewaveisusedtodrivethe
CLK pin, a 5µs RC time constant should be placed in front
of the CLK pin to maintain low offset voltage performance
(see Figure 2). This avoids internal and external coupling
of the high frequency components of the external clock at
the instant the LTC2053-SYNC holds the sampled input.
The LTC2053-SYNC is tested with a sample clock of 3kHz
(fCLK = 24kHz) to the same specifications as the LTC2053.
In addition the LTC2053-SYNC is tested at 1/2 and 2X this
frequency to verify proper operation. The curves in the
Typical Performance Characteristics section of this
datasheetapplytotheLTC2053-SYNCwhendrivingitwith
a 24kHz clock at PIN1 (fCLK = 24kHz, 3kHz sample clock
rate). Belowarethreecurvesthatshowthebehaviorofthe
LTC2053-SYNC as the clock frequency is varied. The
offset is essentially unaffected over a 2:1 increase or
decrease of the typical LTC2053 sample clock speed. The
biascurrentisdirectlyproportionaltotheclockspeed.The
noise is roughly proportional to the square root of the
clock frequency. For optimum noise and bias current
performance, drive the LTC2053-SYNC with a nominal
24kHz external clock (3kHz sample clock).
1kΩ
EXTERNAL
CLOCK
5V
8
4.7nF
0V
3
2
5V
1
V
V
+
+IN
+
7
CLK
V
V
OUT
D
6
R2
–
–
5
–IN
4
LTC2053-SYNC
R1
2053 F02
Figure 2
LTC2053-SYNC
Input Offset
vs Sample Frequency
LTC2053-SYNC
Average Input Bias Current
vs Sample Frequency
LTC2053-SYNC
Input Referred Noise
vs Sample Frequency
20
15
14
12
10
8
12
10
8
V
= 5V
V
= 5V
S
S
A
V
= 0
T
= 25°C
REF
V
= 1V
Noise in 10Hz Bandwidth
CM
V
= ±5V
S
10
5
Typ LTC2053 Sample Frequency
0
6
V
= 5V
= 3V
S
S
6
–5
–10
–15
–20
V
4
4
Typ LTC2053 Sample Frequency
Typ LTC2053 Sample Frequency
2
2
0
0
0
4000
6000
8000 10000
0
4000
6000
8000 10000
0
4000
6000
8000 10000
CLK
2000
2000
2000
SAMPLE FREQUENCY (Hz) (=F /8)
SAMPLE FREQUENCY (Hz) (=F /8)
CLK
SAMPLE FREQUENCY (F /8)
CLK
2053 F03
2053 F04
2053 F05
2053syncfb
11
LTC2053/LTC2053-SYNC
U
TYPICAL APPLICATIO S
Precision ÷2
(Low Noise 2.5V Reference)
Precision Current Source
8V
5V
0.1µF
8
2
1
3
2
4
8
LT1027
–5
–
8
+
–
7
7
LTC2053
REF
R
RG
2.5V
(110nV/√Hz)
LTC2053
2
+
1µF
3
6
0.1µF
6
V
OUT
5
EN
5
4
4
i
1
1
2.7k
V
1k
LOAD
C
i = — , i ≤ 5mA
0.1µF
R
10k
2053 TA03
0 < V
< (5V – V )
OUT C
V
C
0.1µF
2053 TA02
Precision Doubler
(General Purpose)
Precision Inversion
(General Purpose)
5V
5V
0.1µF
0.1µF
3
3
8
8
V
IN
+
+
7
7
LTC2053
V
OUT
LTC2053
V
OUT
2
6
2
6
–
–
V
IN
5
5
4
1
1
4
V
OUT
= 2V
IN
V
OUT
= –V
IN
0.1µF
0.1µF
0.1µF
–5V
2053 TA05
2053 TA04
–5V
2053syncfb
12
LTC2053/LTC2053-SYNC
U
TYPICAL APPLICATIO S
Differential Thermocouple Amplifier
5V
10M
1M 1M
10M
0.1µF
8
+
10k
10k
0°C → 500°C
TYPE K
THERMOCOUPLE
(40.6µV/°C)
3
2
1
YELLOW
ORANGE
+
7
LTC2053
–
10mV/°C
–
RG
REF
5
6
249k
1%
0.001µF
0.001µF
EN
4
0.1µF
100Ω
5V
THERMAL
COUPLING
0.1µF
1k
1%
5V
2
4
3
6
–
SCALE FACTOR
TRIM
1
LTC2050
LT1025
3
V
R
5
+
O
2
–
200k
4
2053 TA06
High Side Power Supply Current Sense
I
0.0015Ω
LOAD
V
REG
0.1µF
LOAD
2
3
8
–
+
OUT
7
100mV/A
OF LOAD
CURRENT
LTC2053
10k
6
5
0.1µF
1,4
150Ω
2053 TA07
2053syncfb
13
LTC2053/LTC2053-SYNC
U
PACKAGE DESCRIPTIO
MS8 Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660)
0.889 ± 0.127
(.035 ± .005)
5.23
(.206)
MIN
3.20 – 3.45
(.126 – .136)
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
0.52
(.0205)
REF
0.65
(.0256)
BSC
0.42 ± 0.038
(.0165 ± .0015)
8
7 6
5
TYP
RECOMMENDED SOLDER PAD LAYOUT
3.00 ± 0.102
(.118 ± .004)
(NOTE 4)
4.90 ± 0.152
(.193 ± .006)
DETAIL “A”
0.254
(.010)
0° – 6° TYP
GAUGE PLANE
1
2
3
4
0.53 ± 0.152
(.021 ± .006)
1.10
(.043)
MAX
0.86
(.034)
REF
DETAIL “A”
0.18
(.007)
SEATING
PLANE
0.22 – 0.38
0.127 ± 0.076
(.009 – .015)
(.005 ± .003)
0.65
(.0256)
BSC
TYP
MSOP (MS8) 0204
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
2053syncfb
14
LTC2053/LTC2053-SYNC
U
PACKAGE DESCRIPTIO
DD Package
8-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1698)
0.675 ±0.05
3.5 ±0.05
2.15 ±0.05 (2 SIDES)
1.65 ±0.05
PACKAGE
OUTLINE
0.25 ± 0.05
0.50
BSC
2.38 ±0.05
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
R = 0.115
0.38 ± 0.10
TYP
5
8
3.00 ±0.10
(4 SIDES)
1.65 ± 0.10
(2 SIDES)
PIN 1
TOP MARK
(NOTE 6)
(DD8) DFN 1203
4
1
0.25 ± 0.05
0.75 ±0.05
0.200 REF
0.50 BSC
2.38 ±0.10
(2 SIDES)
0.00 – 0.05
BOTTOM VIEW—EXPOSED PAD
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON TOP AND BOTTOM OF PACKAGE
2053syncfb
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-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
15
LTC2053/LTC2053-SYNC
U
TYPICAL APPLICATIO
Linearized Platinum RTD Amplifier
5V
0.1µF
*CONFORMING TO IEC751 OR DIN43760
–3 –7
2
R
T
= R (1 + 3.908 • 10 T – 5.775 • 10 T ), R = 100Ω
O O
2
3
8
(e.g. 100Ω AT 0°C, 175.9Ω AT 200°C, 247.1Ω AT 400°C)
–
+
7
1.21k
LTC2053
6
0.1µF
5
4
1
5V
2.7k
16.9k
10k
i ≈ 1mA
5V
0.1µF
LT1634-1.25
11k
249k
2
8
–
49.9Ω
10mV/°C
7
0°C – 400°C
(±0.1°C)
LTC2053
3
6
1M
+
16.2k
5
0.1µF
4
1
PT100*
3-WIRE RTD
CW
LINEARITY
100Ω
10k
ZERO
39.2k
CW
0.1µF
GAIN
953Ω
24.9k
CW
5k
2053 TA08
RELATED PARTS
PART NUMBER
DESCRIPTION
Single Resistor Gain Programmable, Precision Instrumentation Amplifier
COMMENTS
LT1167
Single Gain Set Resistor: G = 1 to 10,000,
Low Noise: 7.5nV√Hz
LTC2050/LTC2051 Zero-Drift Single/Dual Operation Amplifier
SOT-23/MS8 Package
LTC2054/LTC2055 Zero-Drift µPower Operational Amplifier
SOT-23/MS8 Package, 150µA/OP Amp
LTC6800
Single Supply, Zero Drift, Rail-to-Rail Input and Output Instrumentation
Amplifier
MS8 Package, 100µV Max V , 250nV/°C Max Drift
OS
2053syncfb
LT/TP 0205 Rev B 1K • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
16
●
●
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
©LINEAR TECHNOLOGY CORPORATION 2001
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