AD7245A/AD7248A
AD7248A PIN FUNCTION DESCRIPTION
(DIP PIN NUMBERS)
Pin
l
2
Mnemonic
V
SS
R
OFS
Description
Negative Supply Voltage (0 V for single
supply operation).
Bipolar Offset Resistor. This provides
access to the on-chip application resistors
and allows different output voltage ranges.
Reference Output. The on-chip reference
is provided at this pin and is used when
configuring the part for bipolar outputs.
Analog Ground.
Data Bit 11. Most Significant Bit (MSB).
Data Bit 10 to Data Bit 5.
Digital Ground.
Data Bit 4 to Data Bit 1.
Data Bit 0. Least Significant Bit (LSB).
Chip Select Input (Active LOW). The de-
vice is selected when this input is active.
Pin
19
Mnemonic
WR
Description
Write Input (Active LOW). This is used in
conjunction with
CS
to write data into the
input latch of the AD7245A.
Load DAC Input (Active LOW). This is
an asynchronous input which when active
transfers data from the input latch to the
DAC latch.
Clear Input (Active LOW). When this in-
put is active the contents of the DAC latch
are reset to all 0s.
Positive Supply Voltage.
Feedback Resistor. This allows access to
the amplifier’s feedback loop.
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.
20
LDAC
3
REF OUT
21
CLR
4
5
6-11
12
AGND
DB11
DB10-DB5
DGND
22
23
24
V
DD
R
FB
V
OUT
13-16 DB4-DB1
17
18
DB0
CS
AD7245A PIN CONFIGURATIONS
DIP and SOIC
LCCC
PLCC
REV. A
–5–
AD [ ANALOG DEVICES ]
