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參數資料
型號: AD7887AR
廠商: ANALOG DEVICES INC
元件分類: ADC
英文描述: +2.7 V to +5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead uSOIC
中文描述: 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8
封裝: 0.150 INCH, MS-012AA, SOIC-8
文件頁數: 5/16頁
文件大?。?/td> 133K
代理商: AD7887AR
REV. B
AD7887
–5–
PIN FUNCT ION DE SCRIPT IONS
Pin
No.
Pin
Mnemonic
Function
1
CS
Chip Select. Active low logic input. T his input provides the dual function of initiating conversions on the
AD7887 and also frames the serial data transfer. When the AD7887 operates in its default mode, the
CS
pin
also acts as the shutdown pin such that with the
CS
pin high, the AD7887 is in its power-down mode.
Power Supply Input. T he V
DD
range for the AD7887 is from +2.7 V to +5.25 V. When the AD7887 is con-
figured for two-channel operation, this pin also provides the reference source for the part.
Ground Pin. T his pin is the ground reference point for all circuitry on the AD7887. In systems with separate
AGND and DGND planes, these planes should be tied together as close as possible to this GND pin. Where
this is not possible, this GND pin should connect to the AGND plane.
Analog Input 1/Voltage Reference Input. In single-channel mode, this pin becomes the reference input/
output. In this case, the user can either access the internal +2.5 V reference or overdrive the internal refer-
ence with the voltage applied to this pin. T he reference voltage range for an externally-applied reference is
+1.2 V to V
DD
. In two-channel mode, this pin provides the second analog input channel AIN1. T he input
voltage range on AIN1 is 0 to V
DD
.
Analog Input 0. In single-channel mode, this is the analog input and the input voltage range is 0 to V
REF
. In
dual-channel mode, it has an analog input range of 0 to V
DD
.
Data In. Logic Input. Data to be written to the AD7887’s Control Register is provided on this input and is
clocked into the register on the rising edge of SCLK (see Control Register section). T he AD7887 can be
operated as a single-channel read-only ADC by tying the DIN line permanently to GND.
Data Out. Logic Output. T he conversion result from the AD7887 is provided on this output as a serial data
stream. T he bits are clocked out on the falling edge of the SCLK input. T he data stream consists of four
leading zeros followed by the 12 bits of conversion data, which is provided MSB first.
Serial Clock. Logic Input. SCLK provides the serial clock for accessing data from the part and writing serial
data to the Control Register. T his clock input is also used as the clock source for the AD7887’s conversion
process.
2
V
DD
3
GND
4
AIN1/V
REF
5
AIN0
6
DIN
7
DOUT
8
SCLK
PIN CONFIGURAT ION
TOP VIEW
(Not to Scale)
8
7
6
5
1
2
3
4
CS
SCLK
AD7887
V
DD
GND
AIN1/V
REF
DOUT
DIN
AIN0
相關PDF資料
PDF描述
AD7887ARM +2.7 V to +5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead uSOIC
AD7887BR +2.7 V to +5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead uSOIC
AD7888(中文) 2.7 V to 5.25 V, Micro Power, 8-Channel,125kSPS,12-Bit ADC(微功耗,125kSPS,8通道12位A/D轉換器)
AD7888 +2.7 V to +5.25 V, Micropower, 8-Channel, 125 kSPS, 12-Bit ADC in 16-Lead TSSOP
AD7888AR +2.7 V to +5.25 V, Micropower, 8-Channel, 125 kSPS, 12-Bit ADC in 16-Lead TSSOP
相關代理商/技術參數
參數描述
AD7887ARM 功能描述:IC ADC 12BIT 2CH SRL 8-MSOP RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:16 采樣率(每秒):45k 數據接口:串行 轉換器數目:2 功率耗散(最大):315mW 電壓電源:模擬和數字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC(0.295",7.50mm 寬) 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數目和類型:2 個單端,單極
AD7887ARM-REEL 制造商:Analog Devices 功能描述:ADC Single SAR 125ksps 12-bit Serial 8-Pin MSOP T/R
AD7887ARM-REEL7 功能描述:IC ADC 12BIT 2CH SRL 8-MSOP RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:16 采樣率(每秒):45k 數據接口:串行 轉換器數目:2 功率耗散(最大):315mW 電壓電源:模擬和數字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC(0.295",7.50mm 寬) 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數目和類型:2 個單端,單極
AD7887ARMZ 功能描述:IC ADC 12BIT 2CH SRL 8MSOP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 其它有關文件:TSA1204 View All Specifications 標準包裝:1 系列:- 位數:12 采樣率(每秒):20M 數據接口:并聯 轉換器數目:2 功率耗散(最大):155mW 電壓電源:模擬和數字 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-TQFP 供應商設備封裝:48-TQFP(7x7) 包裝:Digi-Reel® 輸入數目和類型:4 個單端,單極;2 個差分,單極 產品目錄頁面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6
AD7887ARMZ 制造商:Analog Devices 功能描述:IC ADC 12BIT 125KSPS MSOP-8
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