Datasheet

11
LT1112/LT1114
U
A
O
PP
L
IC
AT
ITY
P
I
CA
L
Dual Buffered ±0.617V Reference Powered by Two AA Batteries
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.
SCHE ATIC DIAGRA
WW
(1/2 LT1112, 1/4 LT1114)
–
+
1/2 LT1112
15k
R
X
*
*OPTIONAL
+1.5V
+0.617V
LT1004-1.2
100pF
R
Y
*
*OPTIONAL
–
+
–1.5V
–0.617V
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
LT1112/14 • TA03
1/2 LT1112
20k
0.1%
20k
0.1%
12pF
30k
Q35
800Ω
30pF
Q34
Q5
Q6
4k
35µA
20µA
Q22
Q21
Q8
Q4
Q7
Q13
Q3
S
Q2
S
Q1
S
INVERTING
INPUT
NONINVERTING
INPUT
S
Q9
Q10
Q11
50k 1.5k
Q12
V
–
15µA
5µA
5µA
J1
460Ω
Q15Q14
460Ω
460Ω
Q17
Q25
Q19
Q27
1.5k
Q33
Q29
80µA
28Ω
90Ω
30Ω
Q20
OUT
Q26
Q30
Q31
200Ω200Ω
V
+
Q24
Q16
2.5k
Q32
Q28
Q1 TO Q4 ARE SUPERGAIN TRANSISTORS
LT1112/14 • SD01
10k
Q18
+
–
30k
Q23
3k