Datasheet
AD7245A/AD7248A
REV. B
–5–
AD7245A PIN FUNCTION DESCRIPTIONS
(DIP PIN NUMBERS)
Pin Mnemonic Description
lV
SS
Negative Supply Voltage (0 V for single
supply operation).
2R
OFS
Bipolar Offset Resistor. This provides
access to the on-chip application resistors
and allows different output voltage ranges.
3 REF OUT Reference Output. The on-chip reference
is provided at this pin and is used when
configuring the part for bipolar outputs.
4 AGND Analog Ground.
5 DB11 Data Bit 11. Most Significant Bit (MSB).
6–11 DB10–DB5 Data Bit 10 to Data Bit 5.
12 DGND Digital Ground.
13–16 DB4–DB1 Data Bit 4 to Data Bit 1.
17 DB0 Data Bit 0. Least Significant Bit (LSB).
18 CS Chip Select Input (Active LOW). The
device is selected when this input is active.
Pin Mnemonic Description
19 WR Write Input (Active LOW). This is used in
conjunction with CS to write data into the
input latch of the AD7245A.
20 LDAC Load DAC Input (Active LOW). This is
an asynchronous input which when active
transfers data from the input latch to the
DAC latch.
21 CLR Clear Input (Active LOW). When this
input is active the contents of the DAC
latch are reset to all 0s.
22 V
DD
Positive Supply Voltage.
23 R
FB
Feedback Resistor. This allows access to
the amplifier’s feedback loop.
24 V
OUT
Output Voltage. Three different output
voltage ranges can be chosen: 0 V to 5 V,
0 V to 10 V or –5 V to +5 V.
AD7245A PIN CONFIGURATIONS
DIP and SOIC
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
AD7245A
TOP VIEW
(NOT TO SCALE)
V
SS
R
OFS
REF OUT
AGND
(MSB) DB11
DB10
DB9
DB8
DB7
DB6
DB5
DGND DB4
DB3
DB2
DB1
DB0 (LSB)
CS
WR
LDAC
CLR
V
DD
R
FB
V
OUT
LCCC
4 3 2 1 28 27 26
5
6
7
8
9
10
11
25
24
23
22
21
20
19
12 13 14 15 16 17 18
AGND
DB11
DB10
NC
DB9
DB8
DB7
DB6
DB5
DGND
NC
DB4
DB3
DB2
CLR
LDAC
WR
NC
CS
DB0
DB1
REF OUT
R
OFS
V
SS
NC
V
OUT
R
FB
V
DD
NC = NO CONNECT
AD7245A
TOP VIEW
(NOT TO SCALE)
PLCC
1
2
3
4
5
6
7
AGND
DB11
DB10
NC
DB9
DB8
DB7
25
24
23
22
21
20
19
DB1
DB0
CS
NC
WR
LDAC
CLR
18171615141312
DB2
DB3
DB4
NC
DGND
DB5
DB6
V
DD
R
FB
V
OUT
NC
V
SS
R
OFS
REF OUT
AD7245A
TOP VIEW
(NOT TO SCALE)
NC = NO CONNECT
8
9
10
11
262728