MAX1238EEE/V+

Analog To Digital Converters (ADC) Overview

The MAX1238EEE/V+ is a 12-bit successive-approximation analog-to-digital converter (ADC) featuring 12 analog input channels. It operates from a single 4.5V to 5.5V supply and includes an internal 4.096V voltage reference, track/hold circuitry, and clock. The device utilizes an I2C-compatible 2-wire serial interface supporting up to 1.7MHz high-speed mode. Key electrical parameters include a maximum sampling rate of 94.4ksps, ±1 LSB integral nonlinearity (INL), and ±1 LSB differential nonlinearity (DNL). Supply current is 670µA at full speed, dropping below 1µA in shutdown mode. It is housed in a 16-pin QSOP package and qualified for the -40°C to +85°C temperature range.

Analog To Digital Converters (ADC) Feature Summary

• Integrated 12-channel multiplexer with software-configurable single-ended or fully differential inputs
• Internal 4.096V voltage reference with support for external references ranging from 1V to VDD
• High-speed I2C-compatible serial interface operating in both Fast Mode (400kHz) and High-Speed Mode (1.7MHz)
• AutoShutdown technology reduces power consumption to less than 1µA between conversions

Analog To Digital Converters (ADC) Applications

• Battery-powered test equipment
• Medical instruments
• Handheld portable applications
• Solar-powered remote systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'V+' indicates automotive qualification status as defined by the manufacturer's ordering guide. Confirm that the 16-pin QSOP package dimensions match the design constraints. Ensure the 4.5V to 5.5V supply requirement aligns with the system power architecture, as this variant does not support the lower 2.7V to 3.6V range found in other family members.

Analog To Digital Converters (ADC) Selection Notes

Select the MAX1238EEE/V+ when 12 input channels are required within a 12-bit resolution constraint. This part is suitable for designs needing an internal 4.096V reference and I2C connectivity. Compare against the MAX1239 if a 2.7V to 3.6V supply or 2.048V internal reference is preferred. Consider the MAX1236/MAX1237 if only four channels are needed and an 8-pin µMAX package is desired for space savings.

Analog To Digital Converters (ADC) Part Context

This component belongs to the MAX1236–MAX1239 family of low-power, multichannel ADCs. It shares the same core architecture and pinout compatibility as the MAX1236, MAX1237, and MAX1239. The primary distinctions lie in the number of analog input channels (4 vs. 12) and the supported supply voltage ranges (2.7V–3.6V vs. 4.5V–5.5V). The '/V' suffix specifically denotes automotive qualification within this product line.

Analog To Digital Converters (ADC) Replacement Considerations

Pin-compatible alternatives include the MAX1236EEE+, MAX1237EEE+, and MAX1239EEE+. Note that these substitutes differ in channel count (4 channels) or supply voltage requirements (2.7V–3.6V). Verify that the internal reference voltage (4.096V vs. 2.048V) and supply range are compatible with the existing circuit design before substitution.