參數(shù)資料
型號: AD5781BRUZ-REEL7
廠商: Analog Devices Inc
文件頁數(shù): 18/28頁
文件大?。?/td> 0K
描述: IC DAC 18BIT SRL 20TSSOP
產品變化通告: AD57x1 Feature Change 27/Jul/2011
設計資源: 18-Bit Accurate, low noise, precision bipolar DC voltage source (CN0177)
標準包裝: 1,000
設置時間: 1µs
位數(shù): 18
數(shù)據(jù)接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
轉換器數(shù)目: 1
電壓電源: 模擬和數(shù)字,雙 ±
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 20-TSSOP(0.173",4.40mm 寬)
供應商設備封裝: 20-TSSOP
包裝: 帶卷 (TR)
輸出數(shù)目和類型: *
采樣率(每秒): 1M
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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