AD7908BRUZ Analog Devices Inc, AD7908BRUZ Datasheet

AD7908BRUZ

Manufacturer Part Number

AD7908BRUZ

Description

IC ADC 8BIT 8CH 1MSPS 20-TSSOP

Manufacturer

Analog Devices Inc

Datasheets

1.AD7918BRUZ-REEL.pdf (28 pages)

2.AD7908BRUZ.pdf (24 pages)

Specifications of AD7908BRUZ

Data Interface

DSP, MICROWIRE™, QSPI™, Serial, SPI™

Number Of Bits

Sampling Rate (per Second)

Number Of Converters

Power Dissipation (max)

13.5mW

Voltage Supply Source

Single Supply

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

20-TSSOP (0.173", 4.40mm Width)

Resolution (bits)

8bit

Sampling Rate

1MSPS

Input Channel Type

Single Ended

Supply Voltage Range - Analog

2.7V To 5.25V

Supply Current

2.7mA

Digital Ic Case Style

TSSOP

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

For Use With

EVAL-AD79X8CBZ - BOARD EVALUATION FOR AD79X8

Lead Free Status / RoHS Status

Lead free / RoHS Compliant, Lead free / RoHS Compliant

Available stocks

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Company:

Bonase Electronics (HK) Co., Limited

Part Number:

AD7908BRUZ

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ADI

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BOSTOCK HK LIMITED

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Company:

Bonase Electronics (HK) Co., Limited

Part Number:

AD7908BRUZ-REEL

Manufacturer:

ADI

Quantity:

1 000

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GENERAL DESCRIPTION

The AD7908/AD7918/AD7928 are, respectively, 8-bit, 10-bit,

and 12-bit, high speed, low power, 8-channel, successive

approximation 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-

and-hold amplifier that can handle input frequencies in excess

of 8 MHz.

The conversion process and data acquisition are controlled using

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

face 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 AD7908/AD7918/AD7928 use advanced design techniques to

achieve very low power dissipation at maximum throughput rates.

At maximum throughput rates, the AD7908/AD7918/AD7928

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

current consumption is 2.7 mA maximum.

Through the configuration of the Control Register, the analog

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

put coding. The AD7908/AD7918/AD7928 each feature eight

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

preprogrammed selection of channels to be converted sequentially.

The conversion time for the AD7908/AD7918/AD7928 is deter-

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

clock to control the conversion.

REV. A

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. 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.

FEATURES

Fast Throughput Rate: 1 MSPS

Specified for AV

Low Power:

8 (Single-Ended) Inputs with Sequencer

Wide Input Bandwidth:

Flexible Power/Serial Clock Speed Management

No Pipeline Delays

High Speed Serial Interface SPI

Shutdown Mode: 0.5 A Max

20-Lead TSSOP Package

REF

6.0 mW Max at 1 MSPS with 3 V Supply

13.5 mW Max at 1 MSPS with 5 V Supply

AD7928, 70 dB Min SINAD at 50 kHz Input Frequency

MICROWIRE™/DSP Compatible

, with either straight binary or twos complement out-

of 2.7 V to 5.25 V

/QSPI™/

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

or 0 V to

with Sequencer in 20-Lead TSSOP

PRODUCT HIGHLIGHTS

1. High Throughput with Low Power Consumption.

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

3. Single-Supply Operation with V

4. Flexible Power/Serial Clock Speed Management.

5. No Pipeline Delay.

REF

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

•

The AD7908/AD7918/AD7928 offer up to 1 MSPS throughput

rates. At the maximum throughput rate with 3 V supplies, the

AD7908/AD7918/AD7928 dissipate just 6 mW of power

maximum.

A sequence of channels can be selected, through which the

ADC will cycle and convert on.

The AD7908/AD7918/AD7928 operate from a single 2.7 V to

5.25 V supply. The V

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

independent of AV

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 parts feature a standard successive approximation ADC

with accurate control of the sampling instant via a CS input

and once off conversion control.

AD7908/AD7918/AD7928

MUX

FUNCTIONAL BLOCK DIAGRAM

I/P

SEQUENCER

T/H

DRIVE

GND

function allows the serial interface

APPROXIMATION

CONTROL LOGIC

DRIVE

SUCCESSIVE

8-/10-/12-BIT

ADC

Function.

www.analog.com

SCLK

DOUT

DIN

DRIVE

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