参数资料
型号: EVAL-AD5791SDZ
厂商: Analog Devices Inc
文件页数: 15/29页
文件大小: 0K
描述: BOARD EVAL FOR AD5791
标准包装: 1
DAC 的数量: 1
位数: 20
数据接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
设置时间: 1µs
DAC 型: 电压
工作温度: -40°C ~ 125°C
已供物品: 板,CD
已用 IC / 零件: AD5791
Data Sheet
AD5791
Rev. D | Page 21 of 28
Table 9. Hardware Control Pins Truth Table
LDAC
CLR
RESET
Function
0
The AD5791 is in reset mode. The device cannot be programmed.
The AD5791 is returned to its power-on state. All registers are set to their default values.
0
1
The DAC register is loaded with the clearcode register value and the output is set accordingly.
0
1
The output is set according to the DAC register value.
1
0
1
The DAC register is loaded with the clearcode register value and the output is set accordingly.
1
The output is set according to the DAC register value.
0
1
The output remains at the clear code value.
1
The output remains set according to the DAC register value.
0
1
The output remains at the clear code value.
1
The DAC register is loaded with the clearcode register value and the output is set accordingly.
0
1
The DAC register is loaded with the clearcode register value and the output is set accordingly.
1
The output remains at the clear code value
0
1
The output is set according to the DAC register value.
1
X is don’t care.
ON-CHIP REGISTERS
DAC Register
Table 10 outlines how data is written to and read from the DAC register.
Table 10. DAC Register
MSB
LSB
DB23
DB22
DB21
DB20
DB19
DB0
R/W
Register address
DAC register data
R/W
0
1
20-bits of data
The following equation describes the ideal transfer function of the DAC:
(
)
REFN
REFP
OUT
V
D
V
+
×
=
1
220
where:
VREFN is the negative voltage applied at the VREFN input pins.
VREFP is the positive voltage applied at the VREFP input pins.
D is the 20-bit code programmed to the DAC.
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