MAX1138EEE+

Analog To Digital Converters (ADC) Overview

The MAX1138EEE+ is a low-power, 10-bit analog-to-digital converter (ADC) featuring 12 analog input channels. It operates from a single supply voltage ranging from 4.5V to 5.5V and includes an internal track/hold circuit, voltage reference, and clock. The device utilizes an I²C-compatible 2-wire serial interface supporting data rates up to 1.7MHz in high-speed mode. It achieves a maximum sampling rate of 94.4ksps with a typical supply current of 670µA. The part is housed in a 16-pin QSOP package and is guaranteed to operate over an extended temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Software-configurable unipolar or bipolar operation for differential inputs
• Internal FIFO buffer supports channel-scan mode for automated multi-channel acquisition
• AutoShutdown technology powers down the device between conversions to minimize power consumption
• High-speed I²C-compatible serial interface allows communication at frequencies up to 1.7MHz

Analog To Digital Converters (ADC) Applications

• Hand-held portable instruments
• Medical instrumentation
• Battery-powered test equipment
• Solar-powered remote systems
• Received-signal-strength indicators

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type and lead-free status. Ensure the supply voltage requirements match the system design, as this variant requires 4.5V to 5.5V. Confirm that the I²C slave address aligns with the bus configuration. Check for RoHS compliance details in the latest datasheet revision before finalizing procurement specifications.

Analog To Digital Converters (ADC) Selection Notes

Select the MAX1138EEE+ when 12 analog input channels are required within a compact 16-pin QSOP footprint. This component is suitable for designs needing software-selectable unipolar or bipolar input ranges. Consider the internal 4.096V reference if external components must be minimized. Verify that the host microcontroller supports the necessary I²C timing modes to achieve the desired sampling throughput.

Analog To Digital Converters (ADC) Part Context

This component belongs to the MAX1136–MAX1139 family of low-power, multichannel ADCs. While the MAX1136 and MAX1137 offer four channels in an 8-pin µMAX package, the MAX1138 provides twelve channels in a 16-pin QSOP package. The MAX1139 shares the same pinout but operates on a lower 2.7V to 3.6V supply with a different internal reference voltage.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX1139EEE+ serves as a pin-compatible alternative requiring a 2.7V to 3.6V supply instead of 4.5V to 5.5V. For higher resolution needs, the MAX1238EEE+ offers 12-bit accuracy in the same package. Lower channel count options include the MAX1136EEE+ for 4-channel applications.