LT1167
Single Resistor Gain
Programmable, Precision
Instrumentation Amplifier
FEATURES
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DESCRIPTION
The LT
廬
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/鈭欻z (at 1kHz)
is not compromised by low power dissipation (0.9mA typical
for
鹵2.3V
to
鹵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
(40碌V max), drift (0.3碌V/擄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.
Single Gain Set Resistor: G = 1 to 10,000
Gain Error: G = 10, 0.08% Max
Gain Nonlinearity: G = 10, 10ppm Max
Input Offset Voltage: G = 10, 60碌V Max
Input Offset Voltage Drift: 0.3
碌
V/
擄
C 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:
鹵2.3V
to
鹵18V
1kHz Voltage Noise: 7.5nV/鈭欻z
0.1Hz to 10Hz Noise: 0.28碌V
P-P
Available in 8-Pin PDIP and SO Packages
Meets IEC 1000-4-2 Level 4 ESD Tests with
Two External 5k Resistors
APPLICATIONS
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Bridge Amplifiers
Strain Gauge Amplifiers
Thermocouple Amplifiers
Differential to Single-Ended Converters
Medical Instrumentation
TYPICAL APPLICATION
Single Supply Barometer
V
S
R5
392k
1
LT1634CCZ-1.25
2
3
2
5k
R6
1k
鈥?/div>
5k
R1
825鈩?/div>
LT1167
G = 60
8
3
5
4
TO
4-DIGIT
DVM
6
4
2
6
5k
5k
R2
12鈩?/div>
R4
50k
R3
50k
R
SET
5
+
1/2
LT1490
7
R7
50k
5
6
R8
100k
鈥?/div>
0.2% ACCURACY AT 25擄C
1.2% ACCURACY AT 0擄C TO 60擄C
V
S
= 8V TO 30V
+
+
3
NONLINEARITY (100ppm/DIV)
1/2
LT1490
1
4
鈥?/div>
+
8
LUCAS NOVA SENOR
NPC-1220-015-A-3L
V
S
1
2
1
7
鈥?/div>
VOLTS
2.800
3.000
3.200
INCHES Hg
28.00
30.00
32.00
1167 TA01
U
U
U
Gain Nonlinearity
1167 TA02
G = 1000
R
L
= 1k
V
OUT
=
鹵10V
OUTPUT VOLTAGE (2V/DIV)
1
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