AD7904BRUZ Analog Devices Inc, AD7904BRUZ Datasheet

AD7904BRUZ

Manufacturer Part Number

AD7904BRUZ

Description

IC ADC 8BIT 4CH 1MSPS 16-TSSOP

Manufacturer

Analog Devices Inc

Datasheet

1.AD7924BRU-REEL7.pdf (24 pages)

Specifications of AD7904BRUZ

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

16-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

Package

16TSSOP

Resolution

8 Bit

Architecture

SAR

Number Of Adcs

Number Of Analog Inputs

Digital Interface Type

Serial (SPI, QSPI, Microwire)

Input Type

Voltage

Signal To Noise Ratio

49(Min) dB

Polarity Of Input Voltage

Unipolar

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

For Use With

EVAL-AD79X4CBZ - BOARD EVALUATION FOR AD79X4CBZ

Lead Free Status / RoHS Status

Lead free / RoHS Compliant, Lead free / RoHS Compliant

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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.

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 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.

Through the configuration of the Control Register, the analog

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

to 2 × REF

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.

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.

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, 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.

FEATURES

Fast Throughput Rate: 1 MSPS

Specified for V

Low Power:

4 (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

16-Lead TSSOP Package

6 mW max at 1 MSPS with 3 V Supplies

13.5 mW max at 1 MSPS with 5 V Supplies

AD7924, 70 dB SNR at 50 kHz Input Frequency

MICROWIRE

, with either straight binary or twos complement

/DSP Compatible

of 2.7 V to 5.25 V

/QSPI

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

or 0 V

with Sequencer in 16-Lead TSSOP

PRODUCT HIGHLIGHTS

1. High Throughput with Low Power Consumption.

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

3. Single-Supply Operation with V

4. Flexible Power/Serial Clock Speed Management.

5. No Pipeline Delay.

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

Tel: 781/329-4700

Fax: 781/326-8703

REF

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.

A consecutive sequence of channels can be selected, through

which the ADC will cycle and convert on.

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

to 5.25 V supply. The V

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

independent of V

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.

•

AD7904/AD7914/AD7924

MUX

FUNCTIONAL BLOCK DIAGRAM

I/P

SEQUENCER

T/H

DRIVE

GND

function allows the serial inter-

APPROXIMATION

DRIVE

CONTROL LOGIC

SUCCESSIVE

8-/10-/12-BIT

ADC

Function.

www.analog.com

SCLK

DOUT

DIN

DRIVE

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