Rainbow-electronics MAX1113 Manual de usuario descargar pdf

General Description

The MAX1112/MAX1113 are low-power, 8-bit, 8-chan-

nel analog-to-digital converters (ADCs) that feature an

internal track/hold, voltage reference, clock, and serial

interface. They operate from a single +4.5V to +5.5V

supply and consume only 135µA while sampling at

rates up to 50ksps. The MAX1112’s 8 analog inputs

and the MAX1113’s 4 analog inputs are software-con-

figurable, allowing unipolar/bipolar and single-

ended/differential operation.

Successive-approximation conversions are performed

using either the internal clock or an external serial-inter-

face clock. The full-scale analog input range is deter-

mined by the 4.096V internal reference, or by an

externally applied reference ranging from 1V to V

The 4-wire serial interface is compatible with the SPI™,

QSPI™, and MICROWIRE™ serial-interface standards.

A serial-strobe output provides the end-of-conversion

signal for interrupt-driven processors.

The MAX1112/MAX1113 have a software-program-

mable, 2µA automatic power-down mode to minimize

power consumption. Using power-down, the supply

current is reduced to 13µA at 1ksps, and only 82µA at

10ksps. Power-down can also be controlled using the

SHDN input pin. Accessing the serial interface automat-

ically powers up the device.

The MAX1112 is available in 20-pin SSOP and DIP

packages. The MAX1113 is available in small 16-pin

QSOP and DIP packages.

________________________Applications

Portable Data Logging

Hand-Held Measurement Devices

Medical Instruments

System Diagnostics

Solar-Powered Remote Systems

4–20mA-Powered Remote

Data-Acquisition Systems

____________________________Features

♦ +4.5V to +5.5V Single Supply

♦ Low Power: 135µA at 50ksps

13µA at 1ksps

♦ 8-Channel Single-Ended or 4-Channel Differential

Inputs (MAX1112)

♦ 4-Channel Single-Ended or 2-Channel Differential

Inputs (MAX1113)

♦ Internal Track/Hold; 50kHz Sampling Rate

♦ Internal 4.096V Reference

♦ SPI/QSPI/MICROWIRE-Compatible Serial Interface

♦ Software-Configurable Unipolar or Bipolar Inputs

♦ Total Unadjusted Error: ±1LSB (max)

±0.3LSB (typ)

MAX1112/MAX1113

+5V, Low-Power, Multi-Channel,

Serial 8-Bit ADCs

________________________________________________________________

Maxim Integrated Products

INPUT

SHIFT

CONTROL

LOGIC

INT

CLOCK

OUTPUT

SHIFT

+4.096V

REFERENCE

T/H

ANALOG

INPUT

MUX

8-BIT

SAR ADC

DOUT

SSTRB

DGND

AGND

SCLK

DIN

CH0

CH1

CH3

CH2

CH7*

CH6*

CH5*

CH4*

COM

REFOUT

*MAX1112 ONLY

REFIN

OUT

REF

CLOCK

MAX1112

MAX1113

SHDN

Functional Diagram

19-1231; Rev 1; 10/98

PART

MAX1112CPP

MAX1112CAP 0°C to +70°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

20 Plastic DIP

20 SSOP

EVALUATION KIT

AVAILABLE

Ordering Information

Ordering Information continued at end of data sheet.

Dice are specified at T

= +25°C, DC parameters only.

Pin Configurations appear at end of data sheet.

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

MAX1112C/D 0°C to +70°C Dice*

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

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MAX1112/MAX1113 1
Serial 8-Bit ADCs 1

Indice de contenidos

Pagina 1 - Serial 8-Bit ADCs

General DescriptionThe MAX1112/MAX1113 are low-power, 8-bit, 8-chan-nel analog-to-digital converters (ADCs) that feature aninternal track/hold, voltag

Pagina 2

MAX1112/MAX1113+5V, Low-Power, Multi-Channel, Serial 8-Bit ADCs10 ____________________________________________________________________________________

Pagina 3