Datasheet > AD7922AUJ-RL2

AD7922AUJ-RL2

更新时间： 2024-11-24 20:06:55

品牌	Logo	应用领域
亚德诺 - ADI		光电二极管转换器
页数	文件大小	规格书
26页	343K
描述
IC 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, MO-193BA, TSOT-8, Analog to Digital Converter

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AD7922AUJ-RL2 数据手册

PRELIMINARYTECHNICALDATA

2-Channel, 2.35 V to 5.25 V

Preliminary Technical Data

1MSPS,10-/12-BitADCs

AD7912/AD7922

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Fast Throughput Rate: 1MSPS

Specified for V_DDof 2.35 V to 5.25 V

Low Power:

3.6 mW typ at 1MSPS with 3V Supplies

12.5mW typ at 1MSPS with 5V Supplies

Wide Input Bandwidth:

10-/12-BIT

SUCCESSIVE

APPROXIMATION

ADC

IN1

MUX

T/H

IN2

71dB SNR at 100kHz Input Frequency

Flexible Power/Serial Clock Speed Management

No Pipeline Delays

High Speed Serial Interface

SPI^TM/QSPI^TM/MICROWIRE^TM/DSPCompatible

Standby Mode: 1µA max

SCLK

CONTROL

LOGIC

DOUT

DIN

AD7912/AD7922

Daisy Chain mode

8-Lead TSOT Package

GND

8-Lead MSOP Package

Chain configuration. The Daisy Chain mode allows the

user to read the conversion result from the ADCs

contained in the chain.

APPLICATIONS

Battery-Powered Systems

Personal Digital Assistants

Medical Instruments

MobileCommunications

Instrumentation and Control Systems

Data Acquisition Systems

High-SpeedModems

The AD7912/AD7922 use advanced design techniques to

achieve very low power dissipation at high throughput

rates.

The reference for the part is taken internally from V_DD.

This allows the widest dynamic input range to the ADC.

Thus the analog input range for the part is 0 to V_DD. The

conversion rate is determined by the SCLK signal.

Optical Sensors

GENERAL DESCRIPTION

PRODUCT HIGHLIGHTS

The AD7912/AD7922 are 10-bit and 12-bit, high speed,

low power, 2-channel successive-approximation ADCs

respectively. The parts operate from a single 2.35 V to

5.25 V power supply and feature throughput rates up to 1

MSPS. The parts contain a low-noise, wide bandwidth

track/hold amplifier which can handle input frequencies in

excess of 13MHz.

1. 2-Channel, 1MSPS, 10-/12-bit ADCs in TSOT

package.

2. High Throughput with Low Power Consumption.

3. 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. This allows the average

power consumption to be reduced when a power-down

mode is used while not converting. The part also

features a Power Down mode to maximize power effi-

ciency at lower throughput rates. Current consumption is

1µA max and 50nA typically when in Power Down

mode.

The conversion process and data acquisition are controlled

using CS and the serial clock, allowing the devices to

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 channel to be converted is selected through the DIN

pin and the mode of operation is controlled by CS. The

serial data stream from the DOUT pin has a channel

identifier bit and a mode identifier bit, which provide

information about the channel converted and the current

mode of operation.

4. Daisy Chain mode.

5. Reference derived from the power supply.

6. No Pipeline Delay.

The parts feature a standard successive-approximation

ADC with accurate control of the sampling instant via a

CS input and once-off conversion control.

As a result of the Daisy Chain mode of operation, several

AD7912/AD7922 can be connected together in Daisy

REV. PrE (06/03)

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights ofAnalog 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

World Wide Web Site: http://www.analog.com

Analog Devices, Inc., 2003

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与AD7922AUJ-RL2相关器件

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AD7922AUJZ-REEL7	ADI	获取价格	2-Channel, 2.35 V to 5.25 V, 1 MSPS, 12-Bit A/D Converter
AD7923	ADI	获取价格	4-Channel, 200 kSPS, 12-Bit ADC with Sequencer in 16-Lead TSSOP
AD7923_11	ADI	获取价格	4-Channel, 200 kSPS 12-Bit ADC with Sequencer in 16-Lead TSSOP
AD7923BRU	ADI	获取价格	4-Channel, 200 kSPS, 12-Bit ADC with Sequencer in 16-Lead TSSOP
AD7923BRU-REEL	ADI	获取价格	IC 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16, MO-153AB, TSSOP-16, An
AD7923BRUZ	ADI	获取价格	4-Channel, 200 kSPS 12-Bit ADC with Sequencer in 16-Lead TSSOP
AD7923BRUZ-REEL	ADI	获取价格	4-Channel, 200 kSPS 12-Bit ADC with Sequencer in 16-Lead TSSOP
AD7923BRUZ-REEL7	ADI	获取价格	4-Channel, 200 kSPS 12-Bit ADC with Sequencer in 16-Lead TSSOP
AD7923SRU-EP	ADI	获取价格	4-Channel 200 kSPS, 12-Bit A/D Converter with Sequencer in 16-Lead TSSOP
AD7923SRUZ-EP	ADI	获取价格	4-Channel 200 kSPS, 12-Bit A/D Converter with Sequencer in 16-Lead TSSOP

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