AD7472ARU Analog Devices Inc, AD7472ARU Datasheet

AD7472ARU

Manufacturer Part Number

AD7472ARU

Description

IC ADC 12BIT PARALLEL 24-TSSOP

Manufacturer

Analog Devices Inc

Datasheets

1.AD7472BRU-REEL7.pdf (20 pages)

2.AD7472ARU.pdf (16 pages)

Specifications of AD7472ARU

Rohs Status

RoHS non-compliant

Number Of Bits

Sampling Rate (per Second)

1.5M

Data Interface

Parallel

Number Of Converters

Power Dissipation (max)

12mW

Voltage Supply Source

Analog and Digital

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

24-TSSOP (0.173", 4.40mm Width)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

AD7472ARUZ

Manufacturer:

ADI/亚德诺

Quantity:

20 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

AD7472ARUZ-REEL7

Manufacturer:

ADI/亚德诺

Quantity:

20 000

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GENERAL DESCRIPTION

The AD7470/AD7472 are 10-bit/12-bit high speed, low power,

successive approximation ADCs. The parts operate from a single

2.7 V to 5.25 V power supply and feature throughput rates up to

1.5 MSPS for the 12-bit AD7472 and up to 1.75 MSPS for the

10-bit AD7470. The parts contain a low noise, wide bandwidth

track-and-hold amplifier that can handle input frequencies in

excess of 1 MHz.

The conversion process and data acquisition are controlled

using standard control inputs, allowing easy interfacing to

microprocessors or DSPs. The input signal is sampled on the

falling edge of CONVST, and conversion is also initiated at

this point. BUSY goes high at the start of conversion and

goes low 531.66 ns after falling edge of CONVST (AD7472

with a clock frequency of 26 MHz) to indicate that the con-

version is complete. There are no pipeline delays associated

with the parts. The conversion result is accessed via standard

CS and RD signals over a high speed parallel interface.

The AD7470/AD7472 use advanced design techniques to

achieve very low power dissipation at high throughput rates. With

3 V supplies and 1.5 MSPS throughput rates, the AD7470

typically consumes, on average, just 1.1 mA. With 5 V supplies

and 1.75 MSPS, the average current consumption is typically

1.6 mA. The part also offers flexible power/throughput rate

management. Operating the AD7470 with 3 V supplies and

500 kSPS throughput reduces the current consumption to 713 µA.

At 5 V supplies and 500 kSPS, the part consumes 944 µA.

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. 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.

FEATURES

Specified for V

1.75 MSPS for AD7470 (10-Bit)

1.5 MSPS for AD7472 (12-Bit)

Low Power

Wide Input Bandwidth

70 dB Typ SNR at 500 kHz Input Frequency

Flexible Power/Throughput Rate Management

No Pipeline Delays

High Speed Parallel Interface

Sleep Mode: 50 nA Typ

24-Lead SOIC and TSSOP Packages

AD7470: 3.34 mW Typ at 1.5 MSPS with 3 V Supplies

AD7472: 3.54 mW Typ at 1.2 MSPS with 3 V Supplies

7.97 mW Typ at 1.75 MSPS with 5 V Supplies

8.7 mW Typ at 1.5 MSPS with 5 V Supplies

of 2.7 V to 5.25 V

It is also possible to operate the parts in an auto sleep mode,

where the part wakes up to do a conversion and automatically

enters sleep mode at the end of conversion. This method allows

very low power dissipation numbers at lower throughput rates.

In this mode, the AD7472 can be operated with 3 V supplies at

100 kSPS, and consume an average current of just 124 µA. At

5 V supplies and 100 kSPS, the average current consumption is

171 µA.

The analog input range for the part is 0 V to REF IN. The 2.5 V

reference is applied externally to the REF IN pin. The conver-

sion rate is determined by the externally-applied clock.

PRODUCT HIGHLIGHTS

1. High Throughput with Low Power Consumption. The

2. Flexible Power/Throughput Rate Management. The conver-

3. No Pipeline Delay. The part features a standard successive

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

Tel: 781/329-4700

Fax: 781/326-8703

CONVST

AD7470 offers 1.75 MSPS throughput and the AD7472

offers 1.5 MSPS throughput rates with 4 mW power

consumption.

sion rate is determined by an externally-applied clock allow-

ing the power to be reduced as the conversion rate is reduced.

The part also features an auto sleep mode to maximize power

efficiency at lower throughput rates.

approximation ADC with accurate control of the sampling

instant via a CONVST input and once off conversion control.

10-Bit/12-Bit Parallel ADCs

AD7470 IS A 10-BIT PART WITH DB0 TO DB9 AS OUTPUTS.

AD7472 IS A 12-BIT PART WITH DB0 TO DB11 AS OUTPUTS.

AD7470/AD7472

FUNCTIONAL BLOCK DIAGRAM

T/H

APPROXIMATION

SUCCESSIVE

CONTROL

10-/12-BIT

LOGIC

REF IN

ADC

AD7470/AD7472

AGND

1.75 MSPS, 4 mW

DGND

DRIVERS

OUTPUT

DRIVE

www.analog.com

DB9 (DB11)

DB0

CLK IN

BUSY

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