LT1112 Datasheet, PDF (11/12 Pages) Linear Technology – Dual/Quad Low Power Precision, Picoamp Input Op Amps

LT1112/LT1114
TYPICAL APPLICATI
Dual Buffered ±0.617V Reference Powered by Two AA Batteries
15k
+
R_X*
*OPTIONAL
1/2 LT1112
–
+1.5V
+0.617V
LT1004-1.2
100pF
1/2 LT1112
R_Y*
*OPTIONAL
–1.5V
20k
0.1%
20k
0.1%
TOTAL SUPPLY CURRENT = 700µA
WORKS WITH BATTERIES DISCHARGED
TO ±1.3V
AT ±1.5V: MAXIMUM LOAD CURRENT = 800µA;
CAN BE INCREASED WITH OPTIONAL R_X, R_Y;
AT R_X = R_Y = 750Ω LOAD CURRENT = 2mA
TEMPERATURE COEFFICIENT LIMITED BY
REFERENCE = 20ppm/°C
–0.617V
LT1112/14 • TA03
W
W
SCHE ATIC DIAGRA (1/2 LT1112, 1/4 LT1114)
V⁺
INVERTING
INPUT
–
NONINVERTING
INPUT
+
12pF 30k 30k
Q35 Q34
35µA
20µA
800Ω
30pF
4k
Q19
Q22
Q5
Q6
Q8
S
Q1
Q9
S
Q2
Q13
S
Q3
Q10
15µA
5µA
Q21
Q25
S
Q4
Q24
Q7
3k
Q11 Q23
50k 1.5k
J1
Q12
Q16
460Ω
10k
Q18
Q17
Q14
Q15
5µA
V^–
460Ω
460Ω
80µA
1.5k
Q27
Q29
2.5k
Q20
Q28
Q26
Q33
28Ω
90Ω ^OUT
30Ω
Q32
Q30
Q31
200Ω
200Ω
Q1 TO Q4 ARE SUPERGAIN TRANSISTORS LT1112/14 • SD01
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of circuits as described herein will not infringe on existing patent rights.
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