5962-88766013A Datasheet, PDF (5/16 Pages) Analog Devices – LC2MOS 12-Bit DACPORTs

AD7245A/AD7248A
AD7245A PIN FUNCTION DESCRIPTIONS
(DIP PIN NUMBERS)
Pin Mnemonic Description
l
V_SS
Negative Supply Voltage (0 V for single
supply operation).
2
R_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
18 CS
Data Bit 0. Least Significant Bit (LSB).
Chip Select Input (Active LOW). The
device is selected when this input is active.
Pin Mnemonic Description
19 WR
20 LDAC
21 CLR
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
input is active the contents of the DAC
latch are reset to all 0s.
22 V_DD
23 R_FB
Positive Supply Voltage.
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
V_SS 1
24 V_OUT
R_OFS 2
23 R_FB
REF OUT 3
22 V_DD
AGND 4
21 CLR
(MSB) DB11 5
AD7245A
TOP VIEW
20 LDAC
DB10 6 ^{(NOT TO SCALE)} 19 WR
DB9 7
18 CS
DB8 8
17 DB0 (LSB)
DB7 9
16 DB1
DB6 10
15 DB2
DB5 11
14 DB3
DGND 12
13 DB4
PLCC
LCCC
4 3 2 1 28 27 26
AGND 5
DB11 6
DB10 7
NC 8
DB9 9
DB8 10
DB7 11
AD7245A
TOP VIEW
(NOT TO SCALE)
12 13 14 15 16 17 18
25 CLR
24 LDAC
23 WR
22 NC
21 CS
20 DB0
19 DB1
4 3 2 1 28 27 26
AGND 5
DB11 6
DB10 7
NC 8
DB9 9
DB8 10
DB7 11
AD7245A
TOP VIEW
(NOT TO SCALE)
25 CLR
24 LDAC
23 WR
22 NC
21 CS
20 DB0
19 DB1
12 13 14 15 16 17 18
NC = NO CONNECT
NC = NO CONNECT
REV. B
–5–