AD7248A Analog Devices, AD7248A Datasheet - Page 6

• Manufacturer Part Number: AD7248A
• Description: 12-Bit DACPORT with Double-Buffered Byte Loading
• Manufacturer: Analog Devices

Specifications of AD7248A

• Resolution (bits): 12bit
• Dac Update Rate: 142kSPS
• Dac Settling Time: 7µs
• Max Pos Supply (v): +16.5V
• Single-supply: Yes
• Dac Type: Voltage Out
• Dac Input Format: Byte

AD7245A/AD7248A
Pin
10
11
12
13
2
3
4
5
6
7
8
9
l
(MSB) DB7
REF OUT
Mnemonic
V
R
REF OUT
AGND
DB7
DB6
DB5
DB4
DB3
DGND
DB2
DB1
DB0
AGND
DGND
SS
OFS
R
DB6
DB5
DB4
DB3
V
OFS
SS
10
1
2
3
4
5
6
7
8
9
DIP and SOIC
(NOT TO SCALE)
AD7248A
TOP VIEW
supply operation).
access to the on-chip application resistors
and allows different output voltage ranges.
is provided at this pin and is used when
configuring the part for bipolar outputs.
Description
Negative Supply Voltage (0 V for single
Bipolar Offset Resistor. This provides
Reference Output. The on-chip reference
Analog Ground.
Data Bit 7.
Data Bit 6.
Data Bit 5.
Data Bit 4.
Data Bit 3.
Digital Ground.
Data Bit 2/Data Bit 10.
Data Bit 1/Data Bit 9.
Data Bit 0 (LSB)/Data Bit 8.
20
19
18
17
16
15
14
13
12
11
CSMSB
V
R
V
LDAC
WR
CSLSB
DB0 (LSB)
DB1
DB2
OUT
DD
FB
AD7248A PIN FUNCTION DESCRIPTIONS
AD7248A PIN CONFIGURATIONS
(MSB) DB7
AGND
DB6
DB5
DB4
(ANY PACKAGE)
4
5
6
7
8
3
(NOT TO SCALE)
9
PLCC
AD7248A
TOP VIEW
10
2
11
1
PIN 1
IDENTIFIER
Pin
14
15
16
17
18
19
20
20
12
19
13
Mnemonic
CSMSB
CSLSB
WR
LDAC
V
R
V
18
17
16
15
14
DD
FB
OUT
LDAC
WR
CSLSB
CSMSB
V
DD
Description
Chip Select Input for MS Nibble. (Active
LOW). This selects the upper 4 bits of the
input latch. Input data is right justified.
Chip Select Input for LS byte. (Active
LOW). This selects the lower 8 bits of the
input latch.
Write Input. This is used in conjunction
with CSMSB and CSLSB to load data
into the input latch of the AD7248A.
Load DAC Input (Active LOW). This is
an asynchronous input which when active
transfers data from the input latch to the
DAC latch.
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.
(MSB) DB7
AGND
DB6
DB5
DB4
4
5
6
7
8
(NOT TO SCALE)
9
3
LCCC
AD7248A
TOP VIEW
10 11 12 13
2
1
20 19
18
17
16
15
14
V
LDAC
WR
CSLSB
CSMSB
DD