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參數(shù)資料
| 型號： | AD7871KN |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 14BIT SAMPLING 28-DIP |
| 產(chǎn)品變化通告： | Product Discontinuance 27/Oct/2011 |
| 標準包裝： | 1 |
| 位數(shù)： | 14 |
| 采樣率（每秒）： | 83k |
| 數(shù)據(jù)接口： | 串行，并聯(lián) |
| 轉換器數(shù)目： | 1 |
| 功率耗散（最大）： | 95mW |
| 電壓電源： | 雙 ± |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 28-DIP（0.600"，15.24mm） |
| 供應商設備封裝： | 28-PDIP |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 1 個單端，雙極 |
AD7871/AD7872
–5–
REV. D
AD7872 PIN FUNCTION DESCRIPTION
DIP
No.
Mnemonic
Function
1
CONTROL
Control Input. With this pin at 0 V, the SCLK is noncontinuous; with this pin at –5 V, the SCLK
is continuous.
2
CONVST
Convert Start. A low to high transition on this input puts the track/hold into the hold mode. This
input is asynchronous to the CLK.
3
CLK
Clock Input. An external TTL-compatible clock may be applied to this input. Alternatively, tying
this pin to VSS, enables the internal laser-trimmed oscillator.
4
SSTRB
This is an active low three-state output that provides a framing pulse for serial data. An external
4.7 k
pull-up resistor is required on SSTRB.
5
SCLK
Serial Clock. SCLK is the gated serial clock output derived from the internal or external ADC
clock. If the 14/
8/CLK input is at –5 V, then the SCLK runs continuously. With CONTROL
at 0 V, it is gated off (three-state) after serial transmission is complete. SCLK is an open-drain
output and requires an external 2 k
pull-up resistor.
6
SDATA
Serial Data. This is the three-state serial data output used in conjunction with SCLK and
SSTRB in
serial data transmission. Serial data is valid on the falling edge of SCLK, when
SSTRB is low. An
external 4.7 k
pull-up resistor is required on SDATA.
7
NC
No Connect.
8
DGND
Digital Ground. Ground return for digital circuitry.
9VDD
Positive Supply for analog circuitry, +5 V
± 5%.
10
NC
No Connect.
11
CREF
Decoupling point for on-chip reference. Connect 10 nF capacitor between this pin and AGND.
12
AGND
Analog Ground. Ground reference for analog circuitry.
13
REF OUT
Voltage Reference Output. The internal 3 V reference is provided at this pin. The external load
capability is 500
A.
14
VIN
Analog Input. The input range is
±3 V.
15
VSS
Negative Supply, –5 V
± 5%.
16
VDD
Positive Supply for analog circuitry, +5 V
± 5%. Pin 16 and Pin 9 should be connected together.
PIN CONFIGURATIONS
DIP
DIP, SOIC
PLCC
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