DAC7634
www.ti.com
SBAS134A – JULY 2004 – REVISED AUGUST 2004
PIN DESCRIPTIONS
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
NAME
NC
NC
SDI
DGND
CLK
DGND
LDAC
DGND
LOAD
DGND
CS
DGND
SDO
DGND
DESCRIPTION
No connection
No connection
Serial data input
Digital ground
Data clock input
Digital ground
DAC register load control, rising edge triggered
Digital ground
DAC input register load control, active low
Digital ground
Chip select, active low
Digital ground
Serial data output
Digital ground
Reset Select. Determines the action of RST. If
HIGH, a RST common sets the DAC registers to
mid-scale (8000
H
). If LOW, a RST command sets
the DAC registers to zero (0000
H
).
Digital ground
Reset, rising edge triggered. Depending on the
state of RSTSEL, the DAC registers are set to
either mid-scale or zero.
Digital ground
No connection
No connection
Digital ground
Digital ground
Digital 5-V power supply
Digital 5-V power supply
PIN
25
26
27
28
29
30
31
32
33
34
35
36
37
38
NAME
V
CC
V
CC
AGND
AGND
V
SS
V
SS
V
OUT
D
V
OUT
D Sense
V
REF
L CD Sense
V
REF
L CD
V
REF
H CD
V
REF
H CD Sense
V
OUT
C
V
OUT
C Sense
DESCRIPTION
Analog +5-V power supply
Analog +5-V power supply
Analog ground
Analog ground
Analog +5-V power supply or 0-V single supply
Analog +5-V power supply or 0-V single supply
DAC D output voltage
DAC D's output amplifier inverting input. Used to close
feedback loop at load.
DAC C and D reference low sense input
DAC C and D reference low input
DAC C and D reference high input
DAC C and D reference high sense input
DAC C output voltage
DAC C's output amplifier inverting input. Used to close
the feedback loop at the load.
15
RSTSEL
39
V
OUT
B
DAC B output voltage
16
DGND
40
V
OUT
B Sense
V
REF
H AB Sense
V
REF
H AB
V
REF
L AB
V
REF
L AB Sense
V
SS
AGND
V
OUT
A
V
OUT
A Sense
DAC B's output amplifier inverting input. Used to close
the feedback loop at the load.
DAC A and B reference high sense input
DAC A and B reference high input
DAC A and B reference low input
DAC A and B reference low sense input
Analog –5-V power supply or 0-V single supply
Analog ground
DAC A output voltage
DAC A's output amplifier inverting input. Used to close
the feedback loop at the load.
17
18
19
20
21
22
23
24
RST
DGND
NC
NC
DGND
DGND
V
DD
V
DD
41
42
43
44
45
46
47
48
5
BURR-BROWN [ BURR-BROWN CORPORATION ]
