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參數(shù)資料
| 型號： | AD7322 |
| 廠商： | Atmel Corp. |
| 英文描述： | Software Selectable True Bipolar Input, 2-Channel, 12-Bit Plus Sign ADC |
| 中文描述： | 軟件可選真雙極性輸入，2通道，12位ADC的加號 |
| 文件頁數(shù)： | 16/18頁 |
| 文件大?。?/td> | 901K |
| 代理商： | AD7322 |
AD7322
Preliminary Technical Data
Pin Functional Descriptions
14
13
12
11
9
TOP VIEW
(Not to
Scale)
8
1
2
3
4
7
6
5
AD7322
CS
DIN
SCLK
REFIN/OUT
VSS
DGND
DOUT
VIN1
10
VDRIVE
VIN0
AGND
DGND
VDD
8++
Figure 3. AD7322 Pin Configuration TSSOP
Table 4. AD7324 Pin Function Descriptions
Pin
Mnemonic
Pin
Number
Description
SCLK
14
Serial Clock. Logic Input. A serial clock input provides the SCLK used for accessing the data
from the AD7322. This clock is also used as the clock source for the conversion process.
DOUT
12
Serial Data Output. The conversion output data is supplied to this pin as a serial data stream.
The bits are clocked out on the falling edge of the SCLK input and 16 SCLKs are required to
access the data. The data stream consists of two leading zeros, one channel identification bit, a
Sign bit followed by 12 bits of conversion data. The data is provided MSB first. See the Serial
Interface section.
CS
1
Chip Select. Active low logic input. This input provides the dual function of initiating
conversions on the AD7322 and frames the serial data transfer.
DIN
2
Data In. Data to be written to the on-chip registers is provided on this input and is clocked into
the register on the falling edge of SCLK. See Register section.
AGND
4
Analog Ground. Ground reference point for all analog circuitry on the AD7322. All analog input
signals and any external reference signal should be referred to this AGND voltage.
REF
IN/
REFOUT
5
Reference Input/ Reference Output pin. When enabled the on-chip reference is available on
this pin for use external to the AD7322. Alternativley, the internal reference can be disabled
and an external reference applied to this input. When using the AD7322 with an external
reference, the internal reference must be disabled via the control register. The nominal
reference voltage is 2.5 V, which appears at the pin. The default on power up is for external
Reference operation. See
VCC
10
Analog Supply Voltage, 2.7 V to 5.25 V. This is the supply voltage for the ADC core on the
AD7322. This supply should be decoupled to AGND.
VDD
9
Positive power supply voltage. This is the positive supply voltage for the Analog Input section.
VSS
6
Negative power supply voltage. This is the negavtive supply voltage for the Analog Input
section.
DGND
3,13
This is the Digital Ground pin.
VDRIVE
11
Logic Power Supply input. The voltage applied to this pin determines the operating voltge of
the sertial inteface.
Vin0-Vin1
7,8
Analog input 0 through Analog Input 1. The analog inputs are multiplexed into the on-chip
track-and-hold. The analog input channel for conversion is selected by programming the
channel address bit ADD0, in the control register. The inputs can be configured as 2 Single-
Ended Inputs, 1 True Differential Input pair, 1 Pseudo Differential inputs. The configuration of
the Analog inputs is selected by programming the Mode bits, Mode1 and Mode0, in the
Control Register. The input range on each input channel is controlled by programming the
range register. Inputs ranges of ±10V, ±5V, ±2.5V and 0 to 10V can be selected on each analog
input channel. See Register section.
Rev. PrE | Page 7 of 18
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| AD7322BRU | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Software Selectable True Bipolar Input, 2-Channel, 12-Bit Plus Sign ADC |
| AD7322BRUZ | 功能描述:IC ADC 12BIT+ SAR 2CHAN 14TSSOP RoHS:是 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 系列:microPOWER™ 位數(shù):8 采樣率（每秒）:1M 數(shù)據(jù)接口:串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:- 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類型:8 個單端，單極 產(chǎn)品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| AD7322BRUZ-REEL | 功能描述:IC ADC 12BIT+SAR 2CHAN 14-TSSOP RoHS:是 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):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)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(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
| AD7322BRUZ-REEL7 | 功能描述:IC ADC 12BIT+ SAR 2CHAN 14TSSOP RoHS:是 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):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)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(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
| AD7322LYRU | 制造商:Analog Devices 功能描述: |
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