LT1167_15 Datasheet, PDF (1/22 Pages) Linear Technology – Single Resistor Gain Programmable, Precision Instrumentation Amplifier

FEATURES
n _{Single Gain Set Resistor: G = 1 to 10,000}
n _{Gain Error: G = 10, 0.08% Max}
n _{Input Offset Voltage Drift: 0.3μV/°C Max}
n _{Meets IEC 1000-4-2 Level 4 ESD Tests with}
Two External 5k Resistors
n _{Gain Nonlinearity: G = 10, 10ppm Max}
n _{Input Offset Voltage: G = 10, 60μV Max}
n _{Input Bias Current: 350pA Max}
n _{PSRR at G = 1: 105dB Min}
n _{CMRR at G = 1: 90dB Min}
n _{Supply Current: 1.3mA Max}
n _{Wide Supply Range: ±2.3V to ±18V}
n _{1kHz Voltage Noise: 7.5nV/√Hz}
n _{0.1Hz to 10Hz Noise: 0.28μVP-P}
n _{Available in 8-Pin PDIP and SO Packages}
APPLICATIONS
n _{Bridge Amplifiers}
■ _{Strain Gauge Amplifiers}
■ _{Thermocouple Amplifiers}
■ _{Differential to Single-Ended Converters}
■ _{Medical Instrumentation}
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LT1167
Single Resistor Gain
Programmable, Precision
Instrumentation Amplifier
DESCRIPTION
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, re-
quires 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 imped-
ance (see the Applications Information section).
TYPICAL APPLICATION
Single Supply Barometer
V_S
R5
392k
1
LT1634CCZ-1.25
2
OFFSET R4
ADJUST 50k
R3
50k
3₊
8
1/2
1
LT1490
2_–
4
R6
1k
5₊
1/2
LT1490
R8 ^{6 –}
100k
LUCAS NOVA SENOR
NPC-1220-015-A-3L
4
–¹
5k
5k
2 5k
5k
6
+3
R_SET
5
7
V_S
2–
1
7
R1
825Ω
LT1167
R2
G = 60
12Ω ₈
3+
4
R7
50k
0.2% ACCURACY AT 25°C
1.2% ACCURACY AT 0°C TO 60°C
V_S = 8V TO 30V
6
5
TO
4-DIGIT
DVM
VOLTS
2.800
3.000
3.200
INCHES Hg
28.00
30.00
32.00
1167 TA01
Gain Nonlinearity
OUTPUT VOLTAGE (2V/DIV)
G = 1000
R_L = 1k
V_OUT = ±10V
1167 TA02
1167fc
1