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