参数资料
型号: EVAL-AD5781SDZ
厂商: Analog Devices Inc
文件页数: 18/28页
文件大小: 0K
描述: BOARD EVAL FOR AD5781
标准包装: 1
DAC 的数量: 1
位数: 18
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: AD5781
Data Sheet
AD5781
Rev. D | Page 25 of 28
Gain of Two Configuration
Figure 52 shows an output amplifier configured for a gain of
two. The gain is set by the internal matched 6.8 k resistors,
which are exactly twice the DAC resistance, having the effect
of removing an offset from the input bias current of the external
amplifier. In this configuration, the output spans from 2 × VREFN
VREFP to VREFP. This configuration is used to generate a bipolar
output span from a single-ended reference input, with VREFN =
0 V. For this mode of operation, the RBUF bit of the control
register must be cleared to Logic 0.
A1
6.8k 6.8k
R1
RFB
18-BIT
DAC
VREFPS
VREFPF
VREFP
VREFN = 0V
VREFNS
AD5781
1/2 AD8676
VREFNF
RFB
INV
VOUT
09092-
056
10pF
AD8675,
ADA4898-1,
ADA4004-1
VOUT
Figure 52. Output Amplifier in Gain of Two Configuration
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