LT1167
Single Resistor Gain
Programmable, Precision
Instrumentation Amplifier
DESCRIPTION
FEATURES
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Single Gain Set Resistor: G = 1 to 10,000
Gain Error: G = 10, 0.08% Max
Input Offset Voltage Drift: 0.3μV/°C Max
Meets IEC 1000-4-2 Level 4 ESD Tests with
Two External 5k Resistors
Gain Nonlinearity: G = 10, 10ppm Max
Input Offset Voltage: G = 10, 60μV Max
Input Bias Current: 350pA Max
PSRR at G = 1: 105dB Min
CMRR at G = 1: 90dB Min
Supply Current: 1.3mA Max
Wide Supply Range: ±2.3V to ±18V
1kHz Voltage Noise: 7.5nV/√Hz
0.1Hz to 10Hz Noise: 0.28μVP-P
Available in 8-Pin PDIP and SO Packages
The LT ®1167 is a low power, precision instrumentation
amplifier that requires only one external resistor to set
gains of 1 to 10,000. The low voltage noise of 7.5nV/√Hz
(at 1kHz) is not compromised by low power dissipation
(0.9mA typical for ± 2.3V to ±15V supplies).
The part’s high accuracy (10ppm maximum nonlinearity,
0.08% max gain error (G = 10)) is not degraded even for
load resistors as low as 2k. The LT1167 is laser trimmed for
very low input offset voltage (40μV max), drift (0.3μV/°C),
high CMRR (90dB, G = 1) and PSRR (105dB, G = 1).
Low input bias currents of 350pA max are achieved with
the use of superbeta processing. The output can handle
capacitive loads up to 1000pF in any gain configuration
while the inputs are ESD protected up to 13kV (human
body). The LT1167 with two external 5k resistors passes
the IEC 1000-4-2 level 4 specification.
The LT1167, offered in 8-pin PDIP and SO packages, requires significantly less PC board area than discrete multi
op amp and resistor designs.
The LT1167-1 offers the same performance as the LT1167,
but its input current characteristic at high common mode
voltage better supports applications with high input impedance (see the Applications Information section).
APPLICATIONS
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Bridge Amplifiers
Strain Gauge Amplifiers
Thermocouple Amplifiers
Differential to Single-Ended Converters
Medical Instrumentation
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Single Supply Barometer
VS
1/2
LT1490
2
–
4
1
–
4
5k
R6
1k
R1
825Ω
5k
2
5
6
R8
100k
+
7
+
3
6
LT1167
G = 60
8
3
5
TO
4-DIGIT
DVM
4
5
1/2
LT1490
–
R2
12Ω
5k
RSET
R3
50k
2
1
5k
6
OFFSET R4
ADJUST 50k
1
NONLINEARITY (100ppm/DIV)
2
LT1634CCZ-1.25
8
+
VS
+
3
1
Gain Nonlinearity
LUCAS NOVA SENOR
NPC-1220-015-A-3L
–
R5
392k
OUTPUT VOLTAGE (2V/DIV)
G = 1000
RL = 1k
VOUT = ±10V
7
R7
50k
0.2% ACCURACY AT 25°C
1.2% ACCURACY AT 0°C TO 60°C
VS = 8V TO 30V
VOLTS
2.800
3.000
3.200
INCHES Hg
28.00
30.00
32.00
1167 TA02
1167 TA01
1167fc
1
