MAX136

PRODUCTION

Low Power, 31⁄2 Digit A/D Converter with Display Hold

Data Sheet (Rev. 1) Product Selection Table

Part Models: 5
1ku List Price: Starting From $5.98

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Overview

Power Dissipation Guaranteed Less than 1mW–9V Battery Life 3000 Hours Typical
Hold Pin Allows Indefinite Display Hold
Guaranteed First Reading Recovery from Overrange
On-Board Display Drive Capability—No External Circuitry Required
High-Impedance CMOS Differential Inputs
Low Noise (< 15µV_P-P) Without Hysteresis or Overrange Hangover
Clock and Reference On-Chip
Zero Input Gives Zero Reading
True Polarity Indication for Precision Null Applications
Key Parameters Guaranteed Over Temperature

The MAX136 is a monolithic analog-to-digital converter (ADC) with very high input impedance. It differs from the Maxim ICL7136 in that the MAX136 provides a Hold pin, which makes it possible to hold or "freeze" a reading. The MAX136 directly drives a nonmultiplexed liquid crystal (LCD) display, requiring no external drive circuitry. With minor external component changes, it is pin compatible with the ICL7116 but with significantly reduced power consumption, making the MAX136 a superior device for portable systems.

Versatility and accuracy are inherent features of this ADC. The dual-slope conversion technique automatically rejects interference signals common in industrial environments. True differential inputs allow direct measurements of bridge transducer outputs or load cells. The zero-integrator phase eliminates overrange hangover and hysteresis effects. The MAX136 offers high accuracy by lowering rollover error to less than one count and zero reading drift to less than 1µV/°C.

Applications

Conductance
Current
Material Thickness
Pressure
Resistance
Speed
Temperature
Voltage

Part Models: 5
1ku List Price: Starting From $5.98

Documentation

Data Sheet 1

MAX136: Low Power, 31⁄2 Digit A/D Converter with Display Hold Data Sheet (Rev.1) 11/16/2012

Technical Articles 1

Delta-Sigma ADCs Replace Integrating ADCs for Panel Meters 06/27/2003

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX136C/D	0-CHIP-N/A	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX136CMH+D	Metric Quad Flatpack	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX136CMH+TD	Metric Quad Flatpack	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX136CQH+D	Plastic Leaded Chip Carrier	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX136CQH+TD	Plastic Leaded Chip Carrier	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

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