LT1055_15 Datasheet, PDF (14/16 Pages) Linear Technology – Precision, High Speed, JFET Input Operational Amplifiers

LT1055/LT1056
TYPICAL APPLICATIO S
12-Bit Voltage Output D/A Converter
12-BIT CURRENT OUTPUT D/A
CONVERTER (e.g., 6012,565
OR DAC-80)
0 TO 2
OR 4mA
C_F = 15pF TO 33pF
SETTLING TIME TO 2mV
(0.8 LSB) = 1.5µs TO 2µs
C_F
2_–
15V
7
6
LT1056
3₊
OUTPUT
4 _{0V TO 10V}
–15V
LT1055/56 TA09
W
W
SI PLIFIED SCHE ATIC
NULL 1
–INPUT 2
+INPUT 3
NULL
5
Q8
7k
7k
Q7
7 V⁺
J1 J2
J5 J6
J7
7.5pF
300Ω
Q12
Q11
14k 14k
Q1
8k
9pF
J8
Q2
Q13
200Ω
Q3
120µA*
(160)
Q4
*CURRENTS AS SHOWN FOR LT1055. (X) = CURRENTS FOR LT1056.
Q14
120µA*
(160)
800µA*
(1000)
Q9
Q10
400µA*
(1100)
Q15
20 Ω
6 OUTPUT
J3
Q5
J4
Q16
3k 50Ω
4 V^–
LT1055/56 SCHM
10556fc
14