DAC712
SBAS023A–SEPTEMBER 2000–REVISED JULY 2009 ................................................................................................................................................. www.ti.com
OPERATION
The DAC712 is a monolithic integrated-circuit, 16-bit
D/A converter complete with 16-bit D/A converter
switches and ladder network, voltage reference,
output amplifier, and microprocessor bus interface.
All latches are level-triggered. Data present when the
enable inputs are logic '0' enter the latch. When the
enable inputs return to logic '1', the data are latched.
The CLR input resets both the input latch and the D/A
latch to give a bipolar zero output.
INTERFACE LOGIC
The DAC712 has double-buffered data latches. The
input data latch holds a 16-bit data word before
loading it into the second latch, the D/A latch. This
double-buffered organization permits simultaneous
update of several D/A converters. All digital control
inputs are active low. Refer to the block diagram of
Figure 8.
VREF OUT
+VCC
7
-VCC
Gain Adjust
6
5
8
170W
15kW
+10V
Reference
250W
Bipolar
Offset
Adjust
4
9750W
10kW
+2.5V
-VCC
D/A Switches
CLR
9
VOUT
3
16-Bit D/A Latch
16-Bit Input Latch
A1 11
A0 12
WR 10
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
2
1
DCOM
DB0
LSB
DB15
MSB
ACOM
Figure 8. DAC712 Block Diagram
12
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