参数资料
型号: AD5422AREZ
厂商: Analog Devices Inc
文件页数: 25/44页
文件大小: 0K
描述: IC DAC 16BIT SER 24TSSOP
设计资源: 16-Bit Fully Isolated Output Module Using AD5422 and ADuM1401 (CN0065)
Simplified 16-Bit Voltage Output and 4 mA-to-20 mA Output Solution Using AD5422 (CN0077)
标准包装: 62
设置时间: 25µs
位数: 16
数据接口: MICROWIRE?,串行,SPI?
转换器数目: 1
电压电源: 模拟和数字,双 ±
功率耗散(最大): 950mW
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 24-TSSOP(0.173",4.40mm)裸露焊盘
供应商设备封装: 24-TSSOP 裸露焊盘
包装: 管件
输出数目和类型: 1 电流,单极;1 电流,双极;1 电压,单极;1 电压,双极
采样率(每秒): 40k
产品目录页面: 782 (CN2011-ZH PDF)
Data Sheet
AD5412/AD5422
Rev. I | Page 31 of 44
DATA REGISTER
The data register is addressed by setting the address word of the input shift register to 0x01. The data to be written to the data register is
entered in the D15 to D4 positions for the AD5412 and the D15 to D0 positions for the AD5422, as shown in Table 12 and Table 13.
Table 12. Programming the AD5412 Data Register
MSB
LSB
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
12-bit data-word
X
Table 13. Programming the AD5422 Data Register
MSB
LSB
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
16-bit data-word
CONTROL REGISTER
The control register is addressed by setting the address word of the input shift register to 0x55. The data to be written to the control
register is entered in the D15 to D0 positions, as shown in Table 14. The control register functions are shown in Table 15.
Table 14. Programming the Control Register
MSB
LSB
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
CLRSEL
OVRRNG
REXT
OUTEN
SR clock
SR step
SREN
DCEN
R2
R1
R0
Table 15. Control Register Functions
Option
Description
CLRSEL
See Table 21 for a description of the CLRSEL operation.
OVRRNG
Setting this bit increases the voltage output range by 10% (see the AD5412/AD5422 Features section).
REXT
Setting this bit selects the external current setting resistor (see the AD5412/AD5422 Features section). When
using an external current setting resistor, it is recommended to only set REXT when also setting the OUTEN
bit. Alternately, REXT can be set before the OUTEN bit is set, but the range (see Table 16) must be changed
on the write in which the output is enabled. See Figure 69 for best practice.
OUTEN
Output enable. This bit must be set to enable the outputs. The range bits select which output is functional.
SR clock
Digital slew rate control (see the AD5412/AD5422 Features section).
SR step
Digital slew rate control (see the AD5412/AD5422 Features section).
SREN
Digital slew rate control enable.
DCEN
Daisy chain enable.
R2, R1, R0
Output range select (see Table 16).
Table 16. Output Range Options
R2
R1
R0
Output Range Selected
0
0 V to 5 V voltage range
0
1
0 V to 10 V voltage range
0
1
0
±5 V voltage range
0
1
±10 V voltage range
1
0
1
4 mA to 20 mA current range
1
0
0 mA to 20 mA current range
1
0 mA to 24 mA current range
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