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參數(shù)資料
型號: AD7889
廠商: Analog Devices, Inc.
英文描述: 12-Bit 600 kSPS ADC(單電源600kSPS12位A/D轉(zhuǎn)換器)
中文描述: 12位600 ksps模數(shù)轉(zhuǎn)換器(單電源600kSPS12位的A / D轉(zhuǎn)換器)
文件頁數(shù): 6/12頁
文件大小: 285K
代理商: AD7889
AD7889
6
REV. B PRELIM. 7/97
Preliminary Technical Information
PIN FUNCTION DESCRIPTION
Pin
No.
Mnemonic
Description
1
V
IN2
Analog Input 2. For the AD7889-1, this input either connects to AGND or to V
IN1
to determine
the analog input voltage range. With V
IN2
connected to AGND on the AD7889-1, the analog in-
put range at the V
IN1
input is ±10V. With V
IN2
connected to V
IN1
on the AD7889-1, the analog
input range to the part is ±5V.
With V
IN2
connected to AGND on the AD7889-2, the analog input range at the V
IN1
input is 0 V
to +5V. With V
IN2
connected to V
IN1
on the AD7889-2, the analog input range to the part is 0V
to +2.5 V.
For theAD7889-3, this input can be left unconnected but must not be connected to a potential
other than AGND.
2
V
IN1
Analog Input 1. The analog input voltage to be converted by the AD7889 is applied to this input.
For the AD7889-1, the input voltage range is either ±5V or ±10V depending on where the V
IN2
input is connected. For the AD7889-2, the voltage range on the V
IN1
input is 0 V to +2.5V or 0
V to +5 V with respect to the voltage appearing at the V
IN2
input. For the AD7889-3, the voltage
range on the V
IN1
input is ±2.5V.
Positive supply voltage, +5V ±5%.
Voltage Reference Input. An external reference source should be connected to this pin to provide
the reference voltage for the AD7889s conversion process. The nominal reference voltage for the
AD7889 is 2.5V.
Analog Ground. Ground reference for analog circuitry.
Standby Input. Logic Input. With this input at a logic high, the part is in its normal operating
mode; with this input at a logic low the part is placed in its standby or power-down mode, which
reduces power comsumption to 5mW typical.
3
4
AV
DD
VREF
5
6
AGND
STANDBY
7
RFS
Receive Frame Synchronization. Digital Output. This signal goes low for the duration of valid
output data.
Serial Data. Logic Output. Serial data is provided on this pin when
RFS
is low.
Serial Clock. Logic Input/Output. This pin is used to clock serial data from the AD7889. The pin
can be either an input or an output depending on which interface mode is used. The interface
mode is selected by the 16/14B and CONTCLK pins.
Positive supply voltage for digital logic, +5 V ±5%.
Digital Ground. Ground reference for digital circuitry.
Convert Start. Logic Input. A low to high transition on this input puts the track/hold into its
hold mode and starts conversion.
Idle High. Level triggered input. This input controls the idle state of the serial clock. With the in-
put high, data should be latched on the falling edge of SCLK. With the input low, data should be
latched on the rising edge of SCLK.
16 Clock/14 Clock. Digital Input. This input determines how many clock cycles will be used to
complete a conversion. If the input is high the AD7889 will take 16 clock cycles to complete a
conversion. If the input is low the AD7889 will take 14 clock cycles to complete a conversion.
Continuous Clock. Digital Input. This input tells the AD7889 whether a continuous or burst se-
rial clock is being used. When the input is high the AD7889 expects to receive a continuous serial
clock. When the input is low the AD7889 expects to receive either a burst of 16 or 14 serial clocks
(depending on the state of 16/14B).
Analog Ground. Ground reference for analog circuitry.
8
9
SDATA
SCLK
10
11
12
DV
DD
DGND
CONVST
13
IDLEHI
14
16/14B
15
CONTCLK
16
AGND
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AD7889ACBZ-500R7 功能描述:IC ADC 12BIT CTRLR TOUCH 12WLCSP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:- 標準包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率(位):- 評估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS,BPS):- 電壓基準:- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP(0.173",4.40mm 寬) 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR)
AD7889ACBZ-RL 功能描述:IC ADC 12BIT CTRLR TOUCH 12WLCSP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:- 標準包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率(位):- 評估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS,BPS):- 電壓基準:- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP(0.173",4.40mm 寬) 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR)
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