MAX191BEWG+T

Analog To Digital Converters (ADC) Overview

The MAX191BEWG+T is a monolithic, CMOS, 12-bit analog-to-digital converter (ADC) featuring differential inputs, a track/hold circuit, an internal voltage reference, and parallel or serial microprocessor interfaces. It operates from a single +5V supply or dual ±5V supplies, supporting ground-referenced bipolar input signals. The device provides a guaranteed 100ksps sampling rate with a 7.5µs conversion time and a 2µs acquisition time. A logic power-down input reduces the VDD supply current to a maximum of 50µA. It utilizes a 24-pin Wide SO package.

Analog To Digital Converters (ADC) Feature Summary

• 12-Bit Resolution with ±1/2 LSB Integral Nonlinearity
• Built-In Track/Hold Circuitry
• Internal Reference with Adjustment Capability
• Low Power: 3mA Operating Mode, 20µA Power-Down Mode

Analog To Digital Converters (ADC) Applications

• Battery-Powered Data Logging
• PC Pen Digitizers
• High-Accuracy Process Control
• Electromechanical Systems
• Data-Acquisition Boards for PCs

Analog To Digital Converters (ADC) Procurement Notes

Verify the component status as discontinued by checking official manufacturer documentation. Confirm that the ordering suffix corresponds to the specified temperature range (-40°C to +85°C) and package type (24-pin Wide SO). Ensure compatibility with existing system designs given the end-of-life status.

Analog To Digital Converters (ADC) Selection Notes

Select this model for applications requiring 12-bit resolution at 100ksps with low power consumption. The internal reference simplifies design but allows external adjustment via REFADJ for gain error trimming. Verify interface requirements, as it supports both parallel and serial modes compatible with SPI, QSPI, and Microwire standards.

Analog To Digital Converters (ADC) Part Context

This part belongs to the MAX191 family of low-power, 12-bit sampling ADCs. Variants include different temperature ranges (C, E, M) and packages (Narrow DIP, Wide SO, CERDIP). The BEWG suffix specifically denotes the -40°C to +85°C industrial temperature range and the 24-pin Wide SO package.

Analog To Digital Converters (ADC) Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.

Analog To Digital Converters (ADC) FAQ

How is the internal clock generated?

An external capacitor connected between the CLK and DGND pins generates the internal clock. A nominal value of 120pF produces a 1MHz clock frequency.

What is the function of the REFADJ pin?

The REFADJ pin allows for adjustment of the internal reference voltage to trim system gain errors. Connecting it to VDD enables an extended reference mode.

Can the MAX191 handle bipolar input signals?

Yes, when operated from dual ±5V supplies, the device allows for ground-referenced bipolar input signals. The BIP pin selects unipolar or bipolar mode.