Datasheet > AD7322

AD7322

更新时间： 2024-01-12 02:08:34

品牌	Logo	应用领域
爱特美尔 - ATMEL		/
页数	文件大小	规格书
18页	844K
描述
Software Selectable True Bipolar Input, 2-Channel, 12-Bit Plus Sign ADC

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技术参数
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AD7322 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	TSSOP
包装说明：	ROHS COMPLIANT, MO-153AB-1, TSSOP-14	针数：	14
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.43
Is Samacsys：	N	最大模拟输入电压：	10 V
最小模拟输入电压：	-10 V	最长转换时间：	0.8 µs
转换器类型：	ADC, SUCCESSIVE APPROXIMATION	JESD-30 代码：	R-PDSO-G14
JESD-609代码：	e3	长度：	5 mm
最大线性误差 (EL)：	0.0269%	湿度敏感等级：	1
模拟输入通道数量：	2	位数：	12
功能数量：	1	端子数量：	14
最高工作温度：	85 °C	最低工作温度：	-40 °C
输出位码：	BINARY, 2'S COMPLEMENT BINARY	输出格式：	SERIAL
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装等效代码：	TSSOP14,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	峰值回流温度（摄氏度）：	260
电源：	3/5,-+12/-+16.5 V	认证状态：	Not Qualified
采样速率：	1 MHz	采样并保持/跟踪并保持：	TRACK
座面最大高度：	1.2 mm	子类别：	Analog to Digital Converters
标称供电电压：	5 V	表面贴装：	YES
技术：	CMOS	温度等级：	INDUSTRIAL
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	40	宽度：	4.4 mm
Base Number Matches：	1

AD7322 数据手册

Software Selectable True Bipolar Input,

2-Channel, 12-Bit Plus Sign ADC

Preliminary Technical Data

AD7322*

FEATURES

FUNCTIONAL BLOCK DIAGRAM

• 12-Bit Plus Sign SAR ADC

• True Bipolar Analog Inputs

• Software Selectable Input Ranges

1ꢀ0, ꢁ0, 2.ꢁ0, ꢀ to 1ꢀ0

• Two Analog Inputs with Channel Sequencer

• Single Ended, True Differential and Pseudo Differential

Capability.

• High Analog Input Impedance

• Low Power:- 6 mW

• Full Power Signal Bandwidth: >13 MHz

• Internal 2.ꢁ 0 Reference

• High Speed Serial Interface

• Power Down Modes

• 14-Lead TSSOP

• For 8 and 4 channel equivalent devices see AD7328 and

AD7324 respectively.

Figure 1.

The Serial clock frequency, SCLK, applied to the ADC will

determine the maximum throughput rate the ADC can operate

at. The SCLK signal is used as the conversion clock and also to

transfer data to and from the ADC. The Serial interface is

SPI^TM, QSPI^TM, MICROWIRE^TMand DSP compatible.

GENERAL DESCRIPTION

The AD7322 is a 2-Channel, 12-Bit Plus Sign, 1 MSPS

Successive Approximation ADC. The ADC has a high speed

serial interface that can operate at throughput rates up to 1

MSPS.

The AD7322 offers power down modes to reduce the power

consumption of the ADC at lower throughput rates.

The AD7322 can handle True Bipolar Analog input signals. The

Bipolar ranges are software selectable by programming the on

board Range Register. Bipolar input ranges include 1ꢀ0, ꢁ0,

2.ꢁ0. The AD7322 can also handle a ꢀ to 1ꢀ 0 uniploar input

range, which is also software selectable. Each analog input

channel can be independently programmed to one of the input

ranges by setting the appropriate bits in the Range Register.

PRODUCT HIGHLIGHTS

1. The AD7322 can accept True Bipolar Analog Input signals,

1ꢀ0, ꢁ0, 2.ꢁ0 and ꢀ to 1ꢀ0 unipolar signals.

2. The Two Analog Inputs can be configured as Two Single-

Ended inputs, One True Differential or One Pseudo Differential

Input. The AD7322 has high Impedance Analog Inputs.

The Analog Input Channels can be configured as Single-Ended,

Fully Differential or Pseudo Differential. Dedicated Control

AD7322 contains a Channel Sequencer, allowing automatic

conversions between each analog input channel.

3. The AD7322 features a High Speed Serial Interface.

Throughput Rates up to 1 MSPS can be achieved on the

AD7322.

The ADC contains a 2.ꢁ0 Internal reference. The AD7322 also

allows for external Reference operation. If a 30 external

reference is applied to the REFIN/OUT pin, the ADC can

handle a True Bipolar 12 0 Analog input range. Minimum

0_DDand 0_SSsupplies of 120 are required for this 12 0 input

range.

4. Low Power, 12 mW at maximum throughput rate of 1 MSPS.

* Patent Pending

Rev. PrE

Information furnished by Analog Devices is believed to be accurate and reliable.

However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective companies.

One Technology Way, P.O. Box 91ꢀ6, Norwood, MA ꢀ2ꢀ62-91ꢀ6, U.S.A.

Tel: 781.329.47ꢀꢀ

Fax: 781.326.87ꢀ3

www.analog.com

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