Datasheet

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DAC7634
SBAS134B – JULY 2004 – REVISED DECEMBER 2005
PIN DESCRIPTIONS
PIN NAME DESCRIPTION PIN NAME DESCRIPTION
1 NC No connection 25 V
CC
Analog +5-V power supply
2 NC No connection 26 V
CC
Analog +5-V power supply
3 SDI Serial data input 27 AGND Analog ground
4 DGND Digital ground 28 AGND Analog ground
5 CLK Data clock input 29 V
SS
Analog +5-V power supply or 0-V single supply
6 DGND Digital ground 30 V
SS
Analog +5-V power supply or 0-V single supply
7 LDAC DAC register load control, rising edge triggered 31 V
OUT
D DAC D output voltage
DAC D's output amplifier inverting input. Used to close
8 DGND Digital ground 32 V
OUT
D Sense
feedback loop at load.
9 LOAD DAC input register load control, active low 33 V
REF
L CD Sense DAC C and D reference low sense input
10 DGND Digital ground 34 V
REF
L CD DAC C and D reference low input
11 CS Chip select, active low 35 V
REF
H CD DAC C and D reference high input
12 DGND Digital ground 36 V
REF
H CD Sense DAC C and D reference high sense input
13 SDO Serial data output 37 V
OUT
C DAC C output voltage
DAC C's output amplifier inverting input. Used to close
14 DGND Digital ground 38 V
OUT
C Sense
the feedback loop at the load.
Reset Select. Determines the action of RST. If
HIGH, a RST common sets the DAC registers to
15 RSTSEL 39 V
OUT
B DAC B output voltage
mid-scale (8000
H
). If LOW, a RST command sets
the DAC registers to zero (0000
H
).
DAC B's output amplifier inverting input. Used to close
16 DGND Digital ground 40 V
OUT
B Sense
the feedback loop at the load.
Reset, rising edge triggered. Depending on the
17 RST state of RSTSEL, the DAC registers are set to 41 V
REF
H AB Sense DAC A and B reference high sense input
either mid-scale or zero.
18 DGND Digital ground 42 V
REF
H AB DAC A and B reference high input
19 NC No connection 43 V
REF
L AB DAC A and B reference low input
20 NC No connection 44 V
REF
L AB Sense DAC A and B reference low sense input
21 DGND Digital ground 45 V
SS
Analog –5-V power supply or 0-V single supply
22 DGND Digital ground 46 AGND Analog ground
23 V
DD
Digital 5-V power supply 47 V
OUT
A DAC A output voltage
DAC A's output amplifier inverting input. Used to close
24 V
DD
Digital 5-V power supply 48 V
OUT
A Sense
the feedback loop at the load.
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