AD7847 Analog Devices, AD7847 Datasheet - Page 5

• Manufacturer Part Number: AD7847
• Description: LC2MOS Complete, Dual 12-Bit MDAC, Parallel Loading Structure
• Manufacturer: Analog Devices

Specifications of AD7847

• Resolution (bits): 12bit
• Dac Update Rate: 250kSPS
• Dac Settling Time: 4µs
• Max Pos Supply (v): +15.75V
• Single-supply: No
• Dac Type: Voltage Out
• Dac Input Format: Par

Pin
11
12
13
14
15
16
17
18
19
10
11
12
13
14–24
DB10–DB0
Mnemonic
CSA
CSB
V
V
AGNDA
V
V
AGNDB
V
V
DGND
DB11
WR
REFA
OUTA
DD
SS
OUTB
REFB
AD7837 PIN CONFIGURATION
AGNDA
AGNDB
V
V
V
V
DGND
R
OUTA
OUTB
R
REFA
REFB
AD7847 PIN FUNCTION DESCRIPTION (DIP AND SOIC PIN NUMBERS)
V
V
FBA
FBB
CS
DD
SS
DIP AND SOIC
Description
Chip Select Input for DAC A. Active low logic input. DAC A is selected when this input is low.
Chip Select Input for DAC B. Active low logic input. DAC B is selected when this input is low.
Reference Input Voltage for DAC A. This may be an ac or dc signal.
Analog Output Voltage from DAC A.
Analog Ground for DAC A.
Positive Power Supply.
Negative Power Supply.
Analog Ground for DAC B.
Analog Output Voltage from DAC B.
Reference Input Voltage for DAC B. This may be an ac or dc signal.
Digital Ground.
Data Bit 11 (MSB).
Write Input. WR is a positive edge triggered input which is used in conjunction with CSA and CSB
to write data to the DAC latches.
Data Bit 10 to Data Bit 0 (LSB).
12
10
11
1
2
3
4
5
6
7
8
9
(Not to Scale)
AD7837
TOP VIEW
24
23
22
21
20
19
18
17
16
15
14
13
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
A0
A1
LDAC
WR
AD7847 PIN CONFIGURATION
AGNDA
AGNDB
V
V
V
V
DGND
DB11
OUTA
OUTB
REFA
REFB
CSA
CSB
V
V
DD
SS
DIP AND SOIC
12
10
11
1
2
3
4
5
6
7
8
9
(Not to Scale)
AD7847
TOP VIEW
24
23
22
21
20
19
18
17
16
15
14
13
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB8
DB9
DB10
WR
AD7837/AD7847