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MAX110/MAX111

Low-Cost, 2-Channel, ±14-Bit Serial ADCs

________________________________________________________________

Maxim Integrated Products

General Description

The MAX110/MAX111 analog-to-digital converters

(ADCs) use an internal auto-calibration technique to

achieve 14-bit resolution plus overrange, with no exter-

nal components. Operating supply current is only

550µA (MAX110) and reduces to 4µA in power-down

mode, making these ADCs ideal for high-resolution bat-

tery-powered or remote-sensing applications. A fast

serial interface simplifies signal routing and opto-isola-

tion, saves microcontroller pins, and offers compatibility

with SPI™, QSPI™, and MICROWIRE™. The MAX110

operates with ±5V supplies, and converts differential

analog signals in the -3V to +3V range. The MAX111

operates with a single +5V supply and converts differ-

ential analog signals in the ±1.5V range, or single-

ended signals in the 0V to +1.5V range.

Internal calibration allows for both offset and gain-error

correction under microprocessor (µP) control. Both

devices are available in space-saving 16-pin DIP and

SO packages, as well as an even smaller 20-pin SSOP

package.

________________________Applications

Process Control

Weigh Scales

Panel Meters

Data-Acquisition Systems

Temperature Measurement

____________________________Features

♦ Single +5V Supply (MAX111)

♦ Two Differential Input Channels

♦ 14-Bit Resolution Plus Sign and Overrange

♦ 0.03% Linearity (MAX110)

0.05% Linearity (MAX111)

♦ Low Power Consumption:

550µA (MAX110)

640µA (MAX111)

4µA Shutdown Current

♦ Up to 50 Conversions/sec

♦ 50Hz/60Hz Rejection

♦ Auto-Calibration Mode

♦ No External Components Required

♦ 16-Pin DIP/SO, 20-Pin SSOP

Ordering Information

19-0283; Rev 5; 11/98

Typical Operating Circuit

Pin Configurations

IN1+

IN1-

REF+

REF-

RCSEL

SCLK

DIN

DOUT

IN2+

IN2-

+5V

-5V (0V)

FROM µC

MAX110

MAX111

( ) ARE FOR MAX111

(AGND)

IN1+

REF-

REF+

RCSEL

XCLK

SCLK

BUSY

IN1-

IN2+

IN2-

(AGND)

GND

DIN

DOUT

TOP VIEW

MAX110

MAX111

DIP/SO

( ) ARE FOR MAX111

PART

MAX110ACPE

MAX110BCPE

MAX110ACWE 0°C to +70°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

16 Plastic DIP

16 Wide SO

MAX110BCWE 0°C to +70°C 16 Wide SO

MAX110ACAP 0°C to +70°C 20 SSOP

MAX110BCAP 0°C to +70°C 20 SSOP

EVALUATION KIT

AVAILABLE

MAX110BC/D 0°C to +70°C Dice*

Ordering Information continued at end of data sheet.

Contact factory for dice specifications.

SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.

Pin Configurations continued at end of data sheet.

INL(%)

±0.03

±0.05

±0.03

±0.05

±0.03

±0.05

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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MAX110/MAX111 1

Podsumowanie treści

Strona 1 - MAX110/MAX111

MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs________________________________________________________________Maxim Integrated Products1General

Strona 2

MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs10 ______________________________________________________________________________________Oversamp

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MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs______________________________________________________________________________________ 11ADC Oper

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MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs12 ______________________________________________________________________________________OUTPUTCO

Strona 5

MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs______________________________________________________________________________________ 13CSSCLKtC

Strona 6

MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs14 ______________________________________________________________________________________BUSY1ST

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MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs______________________________________________________________________________________ 15NO-OP is

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MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs16 ______________________________________________________________________________________X = Don&

Strona 9

MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs______________________________________________________________________________________ 173-Step C

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MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs18 ______________________________________________________________________________________Selectin

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MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs______________________________________________________________________________________ 19A 100ms

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MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs2 _______________________________________________________________________________________ABSOLUTE

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MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs20 ______________________________________________________________________________________Capaciti

Strona 14

unloaded, and subtracting this value from actual weightmeasurements. The lowpass filtering action of theMAX111’s sigma-delta converter helps minimize

Strona 15

MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs22 ______________________________________________________________________________________TOP VIEW

Strona 16

MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs______________________________________________________________________________________ 23________

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MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs___________________________________________Package Information (continued)CDIPS.EPSMaxim cannot a

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MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs_______________________________________________________________________________________ 3ELECTRIC

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MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs4 _______________________________________________________________________________________ELECTRIC

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MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs_______________________________________________________________________________________ 5ELECTRIC

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MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs6 _______________________________________________________________________________________Note 10:

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MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs_______________________________________________________________________________________7-0.100-0.

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MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs8 _______________________________________________________________________________________________

Strona 24

MAX110/MAX111Low-Cost, 2-Channel, ±14-Bit Serial ADCs_______________________________________________________________________________________ 9________