LT1469
TYPICAL APPLICATIONS
Extending 16-Bit DAC Performance to 200V Output Swing
125V
1μF
510ꢀ
330ꢀ
V
= 200V
= 25mA
OUT
OUT
P-P
Q1
2N5415
I
15V
THD + N = –90dB at 100Hz
330pF
Q3
10k
2N3440*
V
REF
1k
1k
Q5
50k
50k
1M
1M
2N2222
R
FB
–
27ꢀ
27ꢀ
1N4148
100pF
R
***
SELECT
–
TYPICAL
6ꢀ
1/2 LT1469
+
16 BITS
LTC1597
OUTPUT
19.994k**
1N4148
1/2 LT1469
+
Q6
2N2907
–15V
Q3
2N5415*
Q2
2N3440
*HEAT SINK
**VISHAY S102 RESISTOR 0.01%
***1% METAL FILM RESISTOR
510ꢀ
1μF
330ꢀ
NOTE: FOR FURTHER EXPLANATION,
REFER TO APPLICATION NOTE 74, APPENDIX H
–125V
50k** 50k** 50k** 50k**
15pF
1469 TA03
1469fa
15