LT1167 Datasheet, PDF (1/20 Pages) Linear Technology – Single Resistor Gain Programmable, Precision Instrumentation Amplifier

FEATURES
s _{Single Gain Set Resistor: G = 1 to 10,000}
s _{Gain Error: G = 10, 0.08% Max}
s _{Gain Nonlinearity: G = 10, 10ppm Max}
s _{Input Offset Voltage: G = 10, 60µV Max}
s _{Input Offset Voltage Drift: 0.3µV/°C Max}
s _{Input Bias Current: 350pA Max}
s _{PSRR at G = 1: 105dB Min}
s _{CMRR at G = 1: 90dB Min}
s _{Supply Current: 1.3mA Max}
s _{Wide Supply Range: ±2.3V to ±18V}
s _{1kHz Voltage Noise: 7.5nV/√Hz}
s _{0.1Hz to 10Hz Noise: 0.28µVP-P}
s _{Available in 8-Pin PDIP and SO Packages}
s _{Meets IEC 1000-4-2 Level 4 ESD Tests with}
Two External 5k Resistors
U
APPLICATIONS
s _{Bridge Amplifiers}
s _{Strain Gauge Amplifiers}
s _{Thermocouple Amplifiers}
s _{Differential to Single-Ended Converters}
s _{Medical Instrumentation}
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 high accuracy of 10ppm maximum nonlinearity and
0.08% max gain error (G = 10) is not degraded even for load
resistors as low as 2k (previous monolithic instrumentation
amps used 10k for their nonlinearity specifications). 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. These advantages make the LT1167 the
most cost effective solution for precision instrumentation
amplifier applications.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
Single Supply Barometer
V_S
R5
392k
1
LT1634CCZ-1.25
2
R4
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
G = 1000
RL = 1k
V_OUT = ±10V
OUTPUT VOLTAGE (2V/DIV)
1167 TA02
1