參數(shù)資料
型號(hào)： AD7718BRZ-REEL7
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 37/44頁(yè)
文件大小： 0K
描述： IC ADC 24BIT R-R 8/10CH 28SOIC
標(biāo)準(zhǔn)包裝： 400
位數(shù)： 24
采樣率（每秒）： 1.37k
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）： 3.84mW
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： 28-SOIC（0.295"，7.50mm 寬）
供應(yīng)商設(shè)備封裝： 28-SOIC W
包裝： 帶卷 (TR)
輸入數(shù)目和類型： 5 個(gè)差分，單極；5 個(gè)差分，雙極；10 偽差分，單極；10 偽差分，雙極
配用： EVAL-AD7718EBZ-ND - BOARD EVALUATION FOR AD7718
REV. 0
–42–
AD7708/AD7718
Converting Single-Ended Inputs
The AD7708/AD7718 generally operates in buffered mode. This
places a restriction of AGND + 100 mV to AVDD – 100 mV on
the absolute and common-mode voltages that can be applied to
any input on the AD7708/AD7718.
Some applications may require the measurement of analog
inputs with respect to AGND. To enable the AD7708/AD7718
to be used in these single-ended applications, the buffer on the
AINCOM can be bypassed. The NEGBUF bit in the mode
register controls the operation of the input buffer on the AINCOM
input when a channel is configured for pseudo-differential mode of
operation. If cleared, the analog negative input (AINCOM) is
unbuffered, allowing it to be tied to AGND in single-ended
input configuration. If this bit is set, the analog negative input
(AINCOM) is buffered, placing a restriction on its common-
mode input range. When AINCOM is unbuffered, signals with a
common-mode range from AGND – 30 mV to AVDD + 30 mV
can be accommodated on this input allowing the end user to
connect the AINCOM input to AGND and perform single-
ended measurements with respect to this input. This unbuffered
input path on the AINCOM provides a dynamic load to the
driving source. Therefore, resistor/capacitor combinations on
this input pin can cause dc gain errors, depending on the output
impedance of the source that is driving the AINCOM input. All
analog inputs still operate in buffered mode and their com-
mon-mode and absolute input voltage is restricted to a range
between AGND + 100 mV and AVDD – 100 mV.
Combined Ratiometric and Absolute Value Measurement
System
The AD7708/AD7718 when operated with CHCON = 0 can be
configured for operation as four fully-differential analog inputs or
eight pseudo-differential analog inputs with two fully-differential
reference inputs. Having the ability to use either REFIN1 or
REFIN2 with any channel during the conversion process allows
the end user to make both absolute and ratiometric measure-
ments as shown in Figure 27. In this example a fully-differential
analog input (AIN1–AIN2) is being converted from a bridge trans-
ducer in a ratiometric manner using REFIN1 as the reference
input for this channel. AIN3 is configured as a pseudo-differential
input channel using REFIN2 to perform an absolute measurement
on the potentiometer. The REFSEL bit in the mode register is
used to select which reference is used with the active channel
during the conversion process. When the AD7708/AD7718 is
configured with CHCON = 1, only one reference (REFIN1) is
available. The contents of the CHCON bit override the REFSEL
bit. If the ADC is configured in five fully-differential or 10
pseudo-differential input channel mode, the REFSEL bit setting
is irrelevant as only REFIN1 is available.
REFIN1(–)
AD7718
REFIN2(+)
REFIN1(+)
AINCOM
AIN1
AIN3
AIN2
REFIN2(–)
GND
EXCITATION VOLTAGE = 4V
WIPER
Figure 27. Absolute and Ratiometric Measurement
System Using AD7718
相關(guān)PDF資料
PDF描述
LTC1850IFW#TRPBF IC ADC 10BIT 1.25MSPS 48-TSSOP
VI-BTY-MV-S CONVERTER MOD DC/DC 3.3V 99W
V150B3V3H150BL3 CONVERTER MOD DC/DC 3.3V 150W
V150B3V3H150BL2 CONVERTER MOD DC/DC 3.3V 150W
VI-BTN-MW-S CONVERTER MOD DC/DC 18.5V 100W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD7718EB 制造商:AD 制造商全稱:Analog Devices 功能描述:8-/10-Channel, Low Voltage, Low Power, ADCs
AD7719 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Voltage, Low Power, Factory-Calibrated 16-/24-Bit Dual ADC
AD7719BR 制造商:Analog Devices 功能描述:ADC Dual Delta-Sigma 105sps 24-bit Serial 28-Pin SOIC W 制造商:Rochester Electronics LLC 功能描述:DUAL 16-BIT & 24-BIT SD ADC - Bulk 制造商:Analog Devices 功能描述:Analog-Digital Converter IC Number of Bi
AD7719BR-REEL 功能描述:IC ADC 16BIT 24BIT DUAL 28-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個(gè)單端，單極；1 個(gè)單端，雙極
AD7719BR-REEL7 功能描述:IC ADC 16BIT 24BIT DUAL 28-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個(gè)單端，單極；1 個(gè)單端，雙極
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*