Datasheet

Data Sheet AD5725
Rev. C | Page 9 of 20
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
V
REFP
1
V
OUTB
2
V
OUTA
3
AV
SS
4
V
REFN
28
V
OUTC
27
V
OUTD
26
AV
DD
25
DGND
5
CLR
6
LDAC
7
V
L
24
CS
23
A0
22
DB0 (LSB)
8
A1
21
DB1
9
R/W
20
DB2
10
DB11 (MSB)
19
DB3
11
DB10
18
DB4
12
DB9
17
DB5
13
DB8
16
DB6
14
DB7
15
AD5725
TOP VIEW
(Not to Scale)
06442-006
Figure 6. Pin Configuration Diagram
Table 6. Pin Function Descriptions
Pin No. Mnemonic Description
1
V
REFP
Positive DAC Reference Input. The voltage applied to this pin defines the full-scale output voltage.
Allowable range is AV
DD
− 2.5 V to V
REFN
+ 2.5 V.
2 V
OUTB
Buffered Analog Output Voltage of DAC B.
3 V
OUTA
Buffered Analog Output Voltage of DAC A.
4 AV
SS
Negative Analog Supply Pin. Voltage ranges from 0 V to −15 V.
5 DGND Digital Ground Pin.
6
CLR
Active Low Input. Sets input registers and DAC registers to zero scale (0x000) for the AD5725-1 or midscale
(0x800) for the AD5725.
7
LDAC
Active Low Load DAC Input.
8 DB0 Data Bit 0 (LSB).
9 DB1 Data Bit 1.
10
DB2
Data Bit 2.
11 DB3 Data Bit 3.
12 DB4 Data Bit 4.
13 DB5 Data Bit 5.
14 DB6 Data Bit 6.
15 DB7 Data Bit 7.
16 DB8 Data Bit 8.
17 DB9 Data Bit 9.
18 DB10 Data Bit 10.
19 DB11 Data Bit 11 (MSB).
20 R/
W
Read/Write Pin. Active low to write data to DAC; Active high to read back previous data at data bit pins with
V
L
connected to +5 V.
21 A1 Address Bit 1.
22 A0 Address Bit 0.
23
CS
Active Low Chip Select Pin.
24 V
L
Voltage Supply for Readback Function. Can be left open circuit if not used.
25 AV
DD
Positive Analog Supply Pin. Voltage ranges from +5 V to +15 V.
26 V
OUTD
Buffered Analog Output Voltage of DAC D.
27 V
OUTC
Buffered Analog Output Voltage of DAC C.
28 V
REFN
Negative DAC Reference Input. The voltage applied to this pin defines the zero-scale output voltage.
Allowable range is AV
SS
to V
REFP
− 2.5 V.