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參數(shù)資料
型號(hào): AD7569BQ
廠(chǎng)商: ANALOG DEVICES INC
元件分類(lèi): 模擬信號(hào)調(diào)理
英文描述: LC2MOS Complete, 8-Bit Analog I/0 Systems
中文描述: SPECIALTY ANALOG CIRCUIT, CDIP24
封裝: CERDIP-24
文件頁(yè)數(shù): 19/20頁(yè)
文件大小: 504K
代理商: AD7569BQ
AD7569/AD7669
–19–
REV. B
TARE FUNCTION FOR WEIGH SCALE—AD7569
The infinite sample-and-hold just outlined can also form the ba-
sis of a circuit to provide a tare function for a weigh scale sys-
tem. Figure 30 shows a circuit for a weigh scale system. It
incorporates a tare function using a simple circuit based on the
AD7569.
The AD587, along with the 2N6285, provides a buffered +10 V
reference to supply the low impedance load cell transducer. The
load cell output is amplified by the AD624 precision instrumen-
tation amplifier with gain adjustment provided by R1. The out-
put of the AD624 is applied to the noninverting input of a unity
gain differential summing amplifier that uses the AD707, a high
precision op amp with low drift. The AD707 feeds a 3 1/2 digit
panel meter module that converts the signal for digital readout.
The input signal to the panel meter is also applied to the analog
input of the AD7569 for the tare function. When the tare switch
(S1) is closed, a tare cycle commences and V
IN
is sampled and
held infinitely at V
OUT
until the next tare cycle. V
OUT
drives the
inverting input of the differential amplifier and forces its output
to zero. Thus, the tare function is used to give a readout of zero
for any undesired weight, such as a box, when only the item
placed in it is to be weighed. The tare function can also be used
in calibrating the system, to cancel out offset errors due to the
load cell, AD624 and differential amplifier.
The AD7569 offers many advantages in the system outlined,
such as: simple, low cost circuit—no need for microprocessor,
software, etc.—and low power consumption.
Figure 30. Weigh Scale System with Tare Function
相關(guān)PDF資料
PDF描述
AD7569BR LC2MOS Complete, 8-Bit Analog I/0 Systems
AD7569SE LC2MOS Complete, 8-Bit Analog I/0 Systems
AD7569SQ LC2MOS Complete, 8-Bit Analog I/0 Systems
AD7569ACHIPS LC2MOS Complete, 8-Bit Analog I/0 Systems
AD7569JN LC2MOS Complete, 8-Bit Analog I/0 Systems
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD7569BR 功能描述:IC I/O PORT 8BIT ANLG 24-SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> 接口 - 專(zhuān)用 系列:LC²MOS 標(biāo)準(zhǔn)包裝:3,000 系列:- 應(yīng)用:PDA,便攜式音頻/視頻,智能電話(huà) 接口:I²C,2 線(xiàn)串口 電源電壓:1.65 V ~ 3.6 V 封裝/外殼:24-WQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:24-QFN 裸露焊盤(pán)(4x4) 包裝:帶卷 (TR) 安裝類(lèi)型:表面貼裝 產(chǎn)品目錄頁(yè)面:1015 (CN2011-ZH PDF) 其它名稱(chēng):296-25223-2
AD7569BR-REEL 功能描述:Analog I/O Interface 24-SOIC 制造商:analog devices inc. 系列:LC2MOS 包裝:帶卷(TR) 零件狀態(tài):上次購(gòu)買(mǎi)時(shí)間 應(yīng)用:模擬 I/O 接口:總線(xiàn) 電壓 - 電源:4.75 V ~ 5.25 V 封裝/外殼:24-SOIC(0.295",7.50mm 寬) 供應(yīng)商器件封裝:24-SOIC 安裝類(lèi)型:表面貼裝 標(biāo)準(zhǔn)包裝:1
AD7569BRZ 功能描述:IC I/O PORT 8BIT ANALOG 24SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> 接口 - 專(zhuān)用 系列:LC²MOS 特色產(chǎn)品:NXP - I2C Interface 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:2 通道 I²C 多路復(fù)用器 接口:I²C,SM 總線(xiàn) 電源電壓:2.3 V ~ 5.5 V 封裝/外殼:16-TSSOP(0.173",4.40mm 寬) 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:剪切帶 (CT) 安裝類(lèi)型:表面貼裝 產(chǎn)品目錄頁(yè)面:825 (CN2011-ZH PDF) 其它名稱(chēng):568-1854-1
AD7569JN 功能描述:IC I/O PORT 8BIT ANLG 24-DIP RoHS:否 類(lèi)別:集成電路 (IC) >> 接口 - 專(zhuān)用 系列:LC²MOS 標(biāo)準(zhǔn)包裝:3,000 系列:- 應(yīng)用:PDA,便攜式音頻/視頻,智能電話(huà) 接口:I²C,2 線(xiàn)串口 電源電壓:1.65 V ~ 3.6 V 封裝/外殼:24-WQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:24-QFN 裸露焊盤(pán)(4x4) 包裝:帶卷 (TR) 安裝類(lèi)型:表面貼裝 產(chǎn)品目錄頁(yè)面:1015 (CN2011-ZH PDF) 其它名稱(chēng):296-25223-2
AD7569JNZ 功能描述:IC I/O PORT 8BIT ANALOG 24DIP RoHS:是 類(lèi)別:集成電路 (IC) >> 接口 - 專(zhuān)用 系列:LC²MOS 特色產(chǎn)品:NXP - I2C Interface 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:2 通道 I²C 多路復(fù)用器 接口:I²C,SM 總線(xiàn) 電源電壓:2.3 V ~ 5.5 V 封裝/外殼:16-TSSOP(0.173",4.40mm 寬) 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:剪切帶 (CT) 安裝類(lèi)型:表面貼裝 產(chǎn)品目錄頁(yè)面:825 (CN2011-ZH PDF) 其它名稱(chēng):568-1854-1
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