AD7904

更新时间： 2024-11-19 22:29:15

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
24页	401K
描述
4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP

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数据手册

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AD7904 数据手册

4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs

with Sequencer in 16-Lead TSSOP

AD7904/AD7914/AD7924

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Fast Throughput Rate: 1 MSPS

Specified for V_DDof 2.7 V to 5.25 V

Low Power:

6 mW max at 1 MSPS with 3 V Supplies

13.5 mW max at 1 MSPS with 5 V Supplies

4 (Single-Ended) Inputs with Sequencer

Wide Input Bandwidth:

REF

T/H

•

8-/10-/12-BIT

SUCCESSIVE

APPROXIMATION

ADC

AD7924, 70 dB SNR at 50 kHz Input Frequency

Flexible Power/Serial Clock Speed Management

No Pipeline Delays

I/P

MUX

High Speed Serial Interface SPI^TM/QSPI^TM

MICROWIRE^TM/DSP Compatible

Shutdown Mode: 0.5 ␮A Max

16-Lead TSSOP Package

SCLK

DOUT

DIN

CONTROL LOGIC

SEQUENCER

GENERAL DESCRIPTION

The AD7904/AD7914/AD7924 are respectively, 8-bit, 10-bit,

and 12-bit, high speed, low power, 4-channel, successive-approxi-

mation ADCs. The parts operate from a single 2.7 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 that

can handle input frequencies in excess of 8 MHz.

AD7904/AD7914/AD7924

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 conversion is also

initiated at this point. There are no pipeline delays associated

with the part.

The AD7904/AD7914/AD7924 offer up to 1 MSPS through-

put rates. At the maximum throughput rate with 3 V sup`plies,

the AD7904/AD7914/AD7924 dissipate just 6 mW of

power maximum.

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

A consecutive sequence of channels can be selected, through

which the ADC will cycle and convert on.

The AD7904/AD7914/AD7924 use advanced design techniques to

achieve very low power dissipation at maximum throughput rates.

At maximum throughput rates, the AD7904/AD7914/AD7924

consume 2 mA maximum with 3 V supplies; with 5 V supplies, the

current consumption is 2.7 mA maximum.

3. Single-Supply Operation with V_DRIVEFunction.

The AD7904/AD7914/AD7924 operate from a single 2.7 V

to 5.25 V supply. The V_DRIVEfunction allows the serial inter-

face to connect directly to either 3 V or 5 V processor systems

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 AD7904/AD7914/AD7924 each feature four

single-ended analog inputs with a channel sequencer to allow a

preprogrammed selection of channels to be converted sequentially.

independent of V_DD

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 parts also feature various shutdown modes to

maximize power efficiency at lower throughput rates. Current

consumption is 0.5 µA max when in full shutdown.

The conversion time for the AD7904/AD7914/AD7924 is deter-

mined by the SCLK frequency, as this is also used as the master

clock to control the conversion.

5. 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.

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corporation.

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.

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

12 3 4 5 6 7...24

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与AD7904相关器件

型号	品牌	获取价格	描述	数据表
AD7904BRU	ADI	获取价格	4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP
AD7904BRU-REEL	ADI	获取价格	4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP
AD7904BRU-REEL7	ADI	获取价格	IC 4-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16, MO-153AB, TSSOP-16, Ana
AD7904BRUZ	ADI	获取价格	4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP
AD7904BRUZ	ROCHESTER	获取价格	4-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16, ROHS COMPLIANT, MO-153AB,
AD7904BRUZ-REEL	ADI	获取价格	4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP
AD7904BRUZ-REEL	ROCHESTER	获取价格	4-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16, ROHS COMPLIANT, MO-153AB,
AD7904BRUZ-REEL7	ADI	获取价格	4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP
AD7904BRUZ-REEL7	ROCHESTER	获取价格	4-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16, ROHS COMPLIANT, MO-153AB,
AD7904WYRUZ-REEL7	ADI	获取价格	4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP

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