參數(shù)資料
型號(hào): AD7689BCPZ
廠商: Analog Devices Inc
文件頁(yè)數(shù): 9/32頁(yè)
文件大小: 0K
描述: IC ADC 16BIT 250KSPS 8CH 20LFCSP
產(chǎn)品培訓(xùn)模塊: Power Line Monitoring
Motor Control
產(chǎn)品變化通告: Startup Circuitry Design Improvement Change 15/April/2009
標(biāo)準(zhǔn)包裝: 1
系列: PulSAR®
位數(shù): 16
采樣率(每秒): 250k
數(shù)據(jù)接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 21mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 20-VFQFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 20-LFCSP-VQ
包裝: 托盤
輸入數(shù)目和類型: 8 個(gè)單端,單極;4 個(gè)差分,雙極;4 個(gè)偽差分,雙極
產(chǎn)品目錄頁(yè)面: 778 (CN2011-ZH PDF)
Data Sheet
AD7682/AD7689
Rev. D | Page 17 of 32
TRANSFER FUNCTIONS
With the inputs configured for unipolar range (single-ended,
COM with ground sense, or paired differentially with INx as
ground sense), the data output is straight binary.
With the inputs configured for bipolar range (COM = VREF/2 or
paired differentially with INx = VREF/2), the data outputs are
twos complement.
The ideal transfer characteristic for the AD7682/AD7689 is
shown in Figure 25 and for both unipolar and bipolar ranges
with the internal 4.096 V reference.
100...000
100...001
100...010
011...101
011...110
011...111
TWOS
COMPLEMENT
STRAIGHT
BINARY
000...000
000...001
000...010
111...101
111...110
111...111
A
DC
CO
DE
ANALOG INPUT
+FSR – 1.5LSB
+FSR – 1LSB
–FSR + 1LSB
–FSR
–FSR + 0.5LSB
07353-
027
Figure 25. ADC Ideal Transfer Function
Table 8. Output Codes and Ideal Input Voltages
Description
FSR 1 LSB
Midscale + 1 LSB
2.048063 V
0x8001
62.5 μV
0x0001
Midscale
2.048 V
0x8000
0 V
0x0000
Midscale 1 LSB
2.047938 V
0x7FFF
62.5 μV
0xFFFF
FSR + 1 LSB
62.5 μV
0x0001
2.047938 V
0x8001
FSR
0 V
2.048 V
0x80004
1 With COM or INx = 0 V or all INx referenced to GND.
2 With COM or INx = VREF /2.
3 This is also the code for an overranged analog input ((INx+) (INx), or COM, above VREF GND).
4 This is also the code for an underranged analog input ((INx+) (INx), or COM, below GND).
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