AD7923

更新时间： 2024-01-29 05:16:42

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
20页	410K
描述
4-Channel, 200 kSPS, 12-Bit ADC with Sequencer in 16-Lead TSSOP

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AD7923 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	包装说明：	TSSOP,
针数：	16	Reach Compliance Code：	compliant
风险等级：	5.66	最大模拟输入电压：	5.05 V
最小模拟输入电压：		最长转换时间：	0.8 µs
转换器类型：	ADC, SUCCESSIVE APPROXIMATION	JESD-30 代码：	R-PDSO-G16
长度：	5 mm	最大线性误差 (EL)：	0.0244%
模拟输入通道数量：	4	位数：	12
功能数量：	1	端子数量：	16
最高工作温度：	125 °C	最低工作温度：	-55 °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
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：	260	采样速率：	0.2 MHz
采样并保持/跟踪并保持：	TRACK	座面最大高度：	1.2 mm
标称供电电压：	3 V	表面贴装：	YES
温度等级：	MILITARY	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：	30	宽度：	4.4 mm
Base Number Matches：	1

AD7923 数据手册

4-Channel, 200 kSPS, 12-Bit ADC

with Sequencer in 16-Lead TSSOP

AD7923

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Fast Throughput Rate: 200 kSPS

Specified for AV_DDof 2.7 V to 5.25 V

Low Power:

3.6 mW Max at 200 kSPS with 3 V Supply

7.5 mW Max at 200 kSPS with 5 V Supply

4 (Single-Ended) Inputs with Sequencer

Wide Input Bandwidth:

70 dB Min SNR at 50 kHz Input Frequency

Flexible Power/Serial Clock Speed Management

No Pipeline Delays

High Speed Serial Interface SPI™/QSPI™/

MICROWIRE™/DSP Compatible

REF

T/H

•

12-BIT

SUCCESSIVE

APPROXIMATION

ADC

I/P

MUX

Shutdown Mode: 0.5 ␮A Max

16-Lead TSSOP Package

SCLK

DOUT

DIN

CONTROL LOGIC

SEQUENCER

GENERAL DESCRIPTION

The AD7923 is a 12-bit, high speed, low power, 4-channel,

successive approximation ADC. The part operates from a single

2.7 V to 5.25 V power supply and features throughput rates up

to 200 kSPS. The part contains a low noise, wide bandwidth

track-and-hold amplifier that can handle input frequencies in

excess of 8 MHz.

AD7923

DRIVE

GND

PRODUCT HIGHLIGHTS

1. High Throughput with Low Power Consumption.

The conversion process and data acquisition are controlled using

CS and the serial clock signal, allowing the device to easily

interface with microprocessors or DSPs. The input signal is

sampled on the falling edge of CS and the conversion is also

initiated at this point. There are no pipeline delays associated

with the part.

The AD7923 offers up to 200 kSPS throughput rates. At the

maximum throughput rate with 3 V supplies, the AD7923

dissipates just 3.6 mW of power maximum.

2. Four Single-Ended Inputs with a Channel Sequencer.

A consecutive sequence of channels, through which the ADC

will cycle and convert on, can be selected.

The AD7923 uses advanced design techniques to achieve very low

power dissipation at maximum throughput rates. At maximum

throughput rates, the AD7923 consumes 1.2 mA maximum with 3 V

supplies, and with 5 V supplies the current consumption is 1.5 mA

maximum.

3. Single-Supply Operation with V_DRIVEFunction.

The AD7923 operates from a single 2.7 V to 5.25 V supply.

The V_DRIVEfunction allows the serial interface to connect

directly to either 3 V or 5 V processor systems independent of AV_DD

Through the configuration of the Control Register, the analog

input range for the part can be selected as 0 V to REF_INor 0 V

to 2 ¥ REF_IN, with either straight binary or twos complement

output coding. The AD7923 features four single-ended analog

inputs with a channel sequencer to allow a preprogrammed

selection of channels to be converted sequentially.

4. Flexible Power/Serial Clock Speed Management.

The conversion rate is determined by the serial clock, allowing

the conversion time to be reduced through the serial clock speed

increase. The part also features various shutdown modes to

maximize power efficiency at lower throughput rates. Current

consumption is 0.5 mA maximum when in full shutdown.

The conversion time for the AD7923 is determined by the SCLK

frequency, as this is also used as the master clock to control the

conversion. The conversion time may be as short as 800 ns with

a 20 MHz SCLK.

5. No Pipeline Delay.

The part features a standard successive approximation ADC

with accurate control of the sampling instant via a CS input

and once off conversion control.

REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat

may result from its use. 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 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

www.analog.com

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