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ADC

SCLK

CS

SDATA

T/H

ADCS7476

ADCS7477

ACDS7478

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

ADCS7476, ADCS7477, ADCS7478

SNAS192G – APRIL 2003 – REVISED MAY 2016

ADCS747x 1-MSPS, 12-Bit, 10-Bit, and 8-Bit A/D Converters

1

1 Features

1

•

Variable Power Management

•

Packaged in 6-Pin SOT-23

•

Power Supply Used as Reference

•

Single 2.7-V to 5.25-V Supply Operation

•

Compatible With SPI™, QSPI™, MICROWIRE™,

and DSP

•

Key Specifications

–

Resolution With No Missing Codes (12-Bit, 10-

Bit, and 8-Bit)

–

Conversion Rate: 1 MSPS

–

DNL: 0.5, –0.3 LSB (Typical)

–

INL: ±0.4 LSB (Typical)

–

Power Consumption:

–

3-V Supply: 2 mW (Typical)

–

5-V Supply: 10 mW (Typical)

2 Applications

•

Automotive Navigation

•

FA or ATM Equipment

•

Portable Systems

•

Medical Instruments

•

Mobile Communications

•

Instrumentation and Control Systems

3 Description

The ADCS7476, ADCS7477, and ADCS7478 devices

are low power, monolithic CMOS 12-, 10-, and 8-bit

analog-to-digital converters that operate at 1 MSPS.

The ADCS747x devices are a drop-in replacement for

Analog Device's AD747x. Each device is based on a

successive approximation register architecture with

internal

track-and-hold.

The

serial

interface

is

compatible with several standards, such as SPI,

QSPI, MICROWIRE, and many common DSP serial

interfaces.

The ADCS747x uses the supply voltage as a

reference, enabling the device to operate with a full-

determined from the serial clock (SCLK) speed.

These converters offer a shutdown mode, which can

be used to trade throughput for power consumption.

The ADCS747x is operated with a single supply that

can range from 2.7 V to 5.25 V. Normal power

consumption during continuous conversion, using a

3-V or 5-V supply, is 2 mW or 10 mW respectively.

The power-down feature, which is enabled by a chip

select (CS) pin, reduces the power consumption to

under 5 µW using a 5-V supply. All three converters

are available in a 6-pin SOT-23 package, which

provides an extremely small footprint for applications

where space is a critical consideration. These

products

are

designed

for

operation

over

the

automotive

and

extended

industrial

temperature

range of

−40°C to 125°C.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

ADCS7476

ADCS7477

ADCS7478

SOT-23 (6)

1.60 mm × 2.90 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Block Diagram