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

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Bonase Electronics (HK) Co., Limited

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ADI

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Meier Automation Equipment Co., Limited

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Company:

Bonase Electronics (HK) Co., Limited

Part Number:

AD7908BRUZ-REEL

Manufacturer:

ADI

Quantity:

1 000

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FEATURES

Fast throughput rate: 1 MSPS

Specified for AV

Low power

Eight (single-ended) inputs with sequencer

Wide input bandwidth

Flexible power/serial clock speed management

No pipeline delays

High speed serial interface SPI®/QSPI™/

Shutdown mode: 0.5 μA max

20-lead TSSOP package

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 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 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

REF

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

determined by the SCLK frequency, which is also used as the

master clock to control the conversion.

Rev. B

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 owners.

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 output

of 2.7 V to 5.25 V

or 0 V to 2 ×

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

with Sequencer in 20-Lead TSSOP

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

Tel: 781.329.4700

Fax: 781.461.3113

PRODUCT HIGHLIGHTS

1. High Throughput with Low Power Consumption. The AD7908/

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

3. Single-Supply Operation with V

4. Flexible Power/Serial Clock Speed Management. The conversion

5. No Pipeline Delay. The parts feature a standard successive

REF

•

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 cycles and converts on.

AD7918/AD7928 operate from a single 2.7 V to 5.25 V supply.

The V

to either 3 V or 5 V processor systems independent of AV

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.

approximation ADC with accurate control of the sampling

instant via a CS input and once off conversion control.

AD7908/AD7918/AD7928

DRIVE

AD7908/AD7918/AD7928

FUNCTIONAL BLOCK DIAGRAM

MUX

function allows the serial interface to connect directly

I/P

SEQUENCER

T/H

Figure 1.

GND

DRIVE

APPROXIMATION

CONTROL LOGIC

SUCCESSIVE

8-/10-/12-BIT

Function. The AD7908/

ADC

www.analog.com

SCLK

DOUT

DIN

DRIVE

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