ad7303brm-reel Analog Devices, Inc., ad7303brm-reel Datasheet - Page 10

• Manufacturer Part Number: ad7303brm-reel
• Description: +2.7 V To +5.5 V, Serial Input, Dual Voltage Output 8-bit Dac
• Manufacturer: Analog Devices, Inc.

AD7303
Bit Location
DB15
DB14
DB13
DB12
DB11
DB10
DB9
DB8
DB7–DB0
CONTROL BITS
LDAC
0
0
0
0
0
0
0
1
1
INT/EXT
0
1
PDA
0
0
1
1
|––––––––––––––––––––––––– Control Bits –––––––––––––––––––––––––|––––––––––––––––––––––––– Data Bits –––––––––––––––––––––––––|
DB15 (MSB)
INT/EXT
X
A/B
X
0
1
0
1
0
1
0
1
PDB
0
1
0
1
Mnemonic
INT/EXT
X
LDAC
PDB
PDA
A/B
CR1
CR0
Data
LDAC
PDB
CR1
0
0
0
1
1
1
1
X
X
Function
Internal V
External reference selected; this external reference is applied at the REF pin and ranges from
1 V to V
Function
Both DACs active.
DAC A active and DAC B in power-down mode.
DAC A in power-down mode and DAC B active.
Both DACs powered down.
PBA
Description
Selects between internal and external reference.
Uncommitted bit.
Load DAC bit for synchronous update of DAC outputs.
Power-down DAC B.
Power-down DAC A.
Address bit to select either DAC A or DAC B.
Control Bit 1 used in conjunction with CR0 to implement the various data loading functions.
Control Bit 0 used in conjunction with CR1 to implement the various data loading functions.
These bits contain the data used to update the output of the DACs. DB7 is the MSB and
DB0 the LSB of the 8-bit data word.
Figure 24. Input Shift Register Contents
DD
A/B
DD
/2.
/2 reference selected.
CR1
CR0
0
1
1
0
0
1
1
X
X
CR0
–10–
DB7
Function Implemented
Both DAC registers loaded from shift register.
Update DAC A input register from shift register.
Update DAC B input register from shift register.
Update DAC A DAC register from input register.
Update DAC B DAC register from input register.
Update DAC A DAC register from shift register.
Update DAC B DAC register from shift register.
Load DAC A input register from shift register and update
both DAC A and DAC B DAC registers.
Load DAC B input register from shift register and update
both DAC A and DAC B DAC registers outputs.
DB6
DB5
DB4
DB3
DB2
DB1
DB0 (LSB)
REV. 0
DB0