CAT504 Datasheet, PDF (10/12 Pages) Catalyst Semiconductor – 8-Bit Quad DACpot

CAT504
APPLICATION CIRCUITS (Cont.)
+5V
2.2K
VDD
VREF
4.7 µA
LM385-2.5
+15V
CONTROL
& DATA
DAC
OCPATT5504
+5V
10K
+
–
10K
DAC
GND
VREFL
5 meg
+
–
5 meg
ISINK = 2 - 255 mA
2N7000
39Ω1W
39Ω 1W
2N7000
3.9K
1 mA steps
5 µA steps
10K
10K
–
TIP 30
+
CONTROL
& DATA
-15V
Current Sink with 4 Decades of Resolution
+15V
51K
10K
+5V
VDD
VREFH
+
TIP 29
–
10K
DAC
COAPTT55044
DAC
5 meg
5 meg
5 meg
–
+
5 meg
39Ω 1W
39Ω 1W
BS170P
3.9K
1 mA steps
GND
VREFL
–
+
LM385-2.5
BS170P
5 µA steps
-15V
ISOURCE = 2 - 255 mA
Current Source with 4 Decades of Resolution
Doc. No. 25048-0A 2/98 M-1
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