
LTC2054/LTC2055
12
20545fc
TYPICAL APPLICATIONS
Ground Referred Precision Current Sources
Instrumentation Amplier with 100V Common Mode Input Voltage
Gain of 1001 Single Supply Instrumentation Amplier
–
+
LTC2054
LT1634-1.25
+
–
VOUT
V+
10k
1
2
3
4
5
RSET
0 ≤ IOUT ≤ 100μA
0.2V ≤ VOUT ≤ (V
+) – 1.5V
–
+
LTC2054
LT1634-1.25
+
–
VOUT
V–
1
2
3
4
RSET
20545 TA03
IOUT = ———
RSET
1.25V
IOUT = ———
RSET
1.25V
0 ≤ IOUT ≤ 100μA
(V–) + 1.5V ≤ VOUT ≤ –1V
10k
–
+
1/2
LTC2055HV
–
+
1/2
LTC2055HV
1M
1
3
2
20545 TA04
1k
1M
1k
VOUT
8
4
7
5
6
V+
V–
OUTPUT OFFSET ≤3mV
FOR 0.1% RESISTORS, CMRR = 54dB
+
–
VIN
20545 TA05
+
–
+
–
R1
1M
R2
1k
R3
1k
R4 1M
V+
2
8
1
4
3
6
7
5
VOUT
–VIN
+VIN
1/2
LTC2055
1/2
LTC2055
OUTPUT DC OFFSET ≤ 6mV
FOR 0.1% RESISTORS, CMRR = 54dB
C1
0.1μF