参数资料
型号: AD7303BRM
厂商: Analog Devices Inc
文件页数: 2/16页
文件大小: 0K
描述: IC DAC 8BIT DUAL R-R 8-MSOP
产品培训模块: Data Converter Fundamentals
DAC Architectures
标准包装: 50
设置时间: 1.2µs
位数: 8
数据接口: 串行
转换器数目: 2
电压电源: 单电源
功率耗散(最大): 6.93mW
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)
供应商设备封装: 8-MSOP
包装: 管件
输出数目和类型: 2 电压,单极;2 电压,双极
采样率(每秒): 833k
AD7303
–10–
REV. 0
Bit Location
Mnemonic
Description
DB15
INT
/EXT
Selects between internal and external reference.
DB14
X
Uncommitted bit.
DB13
LDAC
Load DAC bit for synchronous update of DAC outputs.
DB12
PDB
Power-down DAC B.
DB11
PDA
Power-down DAC A.
DB10
A
/B
Address bit to select either DAC A or DAC B.
DB9
CR1
Control Bit 1 used in conjunction with CR0 to implement the various data loading functions.
DB8
CR0
Control Bit 0 used in conjunction with CR1 to implement the various data loading functions.
DB7–DB0
Data
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.
CONTROL BITS
LDAC
A
/B
CR1
CR0
Function Implemented
0
X
0
Both DAC registers loaded from shift register.
0
1
Update DAC A input register from shift register.
0
1
0
1
Update DAC B input register from shift register.
0
1
0
Update DAC A DAC register from input register.
0
1
0
Update DAC B DAC register from input register.
0
1
Update DAC A DAC register from shift register.
0
1
Update DAC B DAC register from shift register.
1
0
X
Load DAC A input register from shift register and update
both DAC A and DAC B DAC registers.
1
X
Load DAC B input register from shift register and update
both DAC A and DAC B DAC registers outputs.
INT
/EXT
Function
0
Internal VDD/2 reference selected.
1
External reference selected; this external reference is applied at the REF pin and ranges from
1 V to VDD/2.
PDA
PDB
Function
0
Both DACs active.
0
1
DAC A active and DAC B in power-down mode.
1
0
DAC A in power-down mode and DAC B active.
1
Both DACs powered down.
DB15 (MSB)
DB0 (LSB)
INT
/EXT
X
LDAC
PDB
PBA
A
/B
CR1
CR0
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
|––––––––––––––––––––––––– Control Bits –––––––––––––––––––––––––|––––––––––––––––––––––––– Data Bits –––––––––––––––––––––––––|
Figure 24. Input Shift Register Contents
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