Datasheet
AD7837/AD7847
REV. C
–5–
AD7847 PIN FUNCTION DESCRIPTION (DIP AND SOIC PIN NUMBERS)
Pin Mnemonic Description
11 CSA Chip Select Input for DAC A. Active low logic input. DAC A is selected when this input is low.
12 CSB Chip Select Input for DAC B. Active low logic input. DAC B is selected when this input is low.
13V
REFA
Reference Input Voltage for DAC A. This may be an ac or dc signal.
14V
OUTA
Analog Output Voltage from DAC A.
15 AGNDA Analog Ground for DAC A.
16V
DD
Positive Power Supply.
17V
SS
Negative Power Supply.
18 AGNDB Analog Ground for DAC B.
19V
OUTB
Analog Output Voltage from DAC B.
10 V
REFB
Reference Input Voltage for DAC B. This may be an ac or dc signal.
11 DGND Digital Ground.
12 DB11 Data Bit 11 (MSB).
13 WR Write Input. WR is a positive edge triggered input which is used in conjunction with CSA and CSB
to write data to the DAC latches.
14–24 DB10–DB0 Data Bit 10 to Data Bit 0 (LSB).
AD7837 PIN CONFIGURATION AD7847 PIN CONFIGURATION
DIP AND SOIC DIP AND SOIC
TOP VIEW
(Not to Scale)
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
AD7837
AGNDA
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
A0
A1
LDAC
WR
V
OUTA
V
REFA
R
FBA
CS
V
DD
V
SS
AGNDB
V
OUTB
V
REFB
DGND
R
FBB
TOP VIEW
(Not to Scale)
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
AD7847
AGNDA
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB8
DB9
DB10
WR
V
OUTA
V
REFA
CSB
CSA
V
DD
V
SS
AGNDB
V
OUTB
V
REFB
DGND
DB11