MAX1239LEEE+

Analog To Digital Converters (ADC) Overview

The MAX1239LEEE+ is a low-power, 12-bit analog-to-digital converter (ADC) featuring 12 analog input channels. It operates from a single supply voltage ranging from 2.7V to 3.6V and includes an internal track/hold circuit, clock generator, and a 2.048V internal voltage reference. The device utilizes a high-speed I²C-compatible serial interface supporting both Fast Mode (400kHz) and High-Speed Mode (1.7MHz). It achieves a maximum sampling rate of 94.4ksps with a typical supply current of 670µA. The ADC employs a successive-approximation register (SAR) architecture and is housed in a 16-pin QSOP package.

Analog To Digital Converters (ADC) Feature Summary

• Integrated 12-channel multiplexer with software-configurable single-ended or differential input modes
• High-speed I²C serial interface supporting up to 1.7MHz for rapid data throughput
• Internal 2.048V voltage reference with external reference capability from 1V to VDD
• AutoShutdown power-down mode reducing supply current to less than 1µA between conversions

Analog To Digital Converters (ADC) Applications

• Handheld portable applications
• Medical instruments
• Battery-powered test equipment
• Solar-powered remote systems
• Received-signal-strength indicators

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix LEEE against official documentation to confirm package type and temperature range compatibility. Confirm lead-free status and RoHS compliance requirements prior to procurement. Check for end-of-life status as distribution availability may be limited.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 12-bit resolution with multiple analog inputs is required in a low-power environment. Ensure the system supply voltage falls within the 2.7V to 3.6V range. Verify that the I²C bus speed supports the desired sampling rate, noting that High-Speed Mode is necessary for rates above 22.2ksps.

Analog To Digital Converters (ADC) Part Context

This part belongs to the MAX1236–MAX1239 family of low-power, multichannel ADCs. It shares architectural similarities with the MAX1236, MAX1237, and MAX1238, differing primarily in channel count and supply voltage specifications. The MAX1239 specifically offers 12 channels and operates at lower voltages compared to the 4-channel MAX1236/MAX1238 variants.

Analog To Digital Converters (ADC) Replacement Considerations

Pin-compatible alternatives include the MAX1236, MAX1237, and MAX1238. Note that these variants differ in channel count (4 vs. 12) and supply voltage requirements (4.5V–5.5V vs. 2.7V–3.6V). Verify electrical characteristics match the application needs before substitution.