PIN CONFIGURATIONS
Top View
SO
PLCC
VREFH
VOUTB
1
2
3
4
5
6
7
8
9
28 VREFL
27 VOUTC
26 VOUTD
25 VCC
4
3
2
1
28 27 26
VOUTA
25 VCC
GND
RESET
LDAC
5
6
7
VSS
24 VDD
GND
24 VDD
23 CS
RESET
LDAC
23 CS
DAC7724
DAC7725
22 A0
(LSB) DB0
DB1
8
9
22 A0
DAC7724
DAC7725
21 A1
(LSB) DB0
DB1
21 A1
20 R/W
19 DB11 (MSB)
DB2 10
DB3 11
20 R/W
19 DB11 (MSB)
18 DB10
17 DB9
16 DB8
15 DB7
DB2 10
DB3 11
DB4 12
DB5 13
DB6 14
12 13 14 15 16 17 18
PIN DESCRIPTIONS
PIN
NAME
DESCRIPTION
1
2
3
4
5
6
VREFH
VOUTB
VOUTA
VSS
Reference Input Voltage High. Sets maximum output voltage for all DACs.
DAC B Voltage Output.
DAC A Voltage Output.
Negative Analog Supply Voltage, 0V or –15V.
Ground.
GND
RESET
Asynchronous Reset Input. Sets DAC and input registers to either mid-scale (800H, DAC7724) or zero-scale (000H, DAC7725)
when LOW.
7
LDAC
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB8
DB9
DB10
DB11
R/W
A1
Load DAC Input. All DAC Registers are transparent when LOW.
8
Data Bit 0. Least significant bit of 12-bit word.
9
Data Bit 1
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Data Bit 2
Data Bit 3
Data Bit 4
Data Bit 5
Data Bit 6
Data Bit 7
Data Bit 8
Data Bit 9
Data Bit 10
Data Bit 11. Most significant bit of 12-bit word.
Read/Write Control Input (read = HIGH, write = LOW).
Register/DAC Select (C or D = HIGH, A or B = LOW).
Register/DAC Select (B or D = HIGH, A or C = LOW).
Chip Select Input.
A0
CS
VDD
Positive Digital Supply, +5V.
VCC
Positive Analog Supply Voltage, +15V nominal.
DAC D Voltage Output.
VOUTD
VOUTC
VREFL
DAC C Voltage Output.
Reference Input Voltage Low. Sets minimum output voltage for all DACs.
®
5
DAC7724, 7725
BB [ BURR-BROWN CORPORATION ]
