MAX1112EAP+

Analog To Digital Converters (ADC) Overview

The MAX1112EAP+ is an 8-bit successive-approximation analog-to-digital converter (ADC) in a 20-pin SSOP package. It operates from a single 4.5V to 5.5V supply, consuming 135µA at 50ksps. The device features eight software-configurable analog inputs supporting unipolar/bipolar and single-ended/differential modes. It includes an internal 4.096V reference, track/hold circuitry, and a serial interface compatible with SPI, QSPI, and MICROWIRE standards. Differential nonlinearity is ±1 LSB, and integral nonlinearity is ±0.5 LSB.

Analog To Digital Converters (ADC) Feature Summary

• Integrated 4.096V voltage reference and track/hold circuitry
• Software-selectable single-ended or differential input configurations
• Compatible with standard serial protocols including SPI and MICROWIRE
• Programmable power-down mode for reduced current consumption

Analog To Digital Converters (ADC) Applications

• Portable data logging systems
• Hand-held measurement devices
• Medical instruments
• Solar-powered remote monitoring systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the component matches the exact Analog Devices / Maxim Integrated part number MAX1112EAP+. Confirm the suffix indicates lead-free construction and RoHS compliance. Ensure the package type is SSOP-20 and the temperature range covers -40°C to +85°C. Cross-reference the manufacturer's official documentation to validate authenticity before procurement.

Analog To Digital Converters (ADC) Selection Notes

Select this ADC when an 8-bit resolution and 50ksps sampling rate are sufficient for the application. It is suitable for designs requiring a single 5V supply and low power consumption. Consider the internal reference if external components must be minimized. Verify that the serial interface timing meets the microcontroller's requirements.

Analog To Digital Converters (ADC) Part Context

This component belongs to the MAX1112/MAX1113 family of low-power, multi-channel serial ADCs. The MAX1112 variant provides eight analog channels, whereas the MAX1113 offers four channels. Both share identical electrical characteristics and functionality, differing primarily in channel count and package pinout.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX1113EEE+ serves as a functional substitute within the same family, offering four channels instead of eight in a QSOP-16 package. Other members of the MAX111x series may provide different resolutions or channel counts but require verification of pin compatibility and electrical specifications.

Analog To Digital Converters (ADC) FAQ

How does the device handle bipolar input signals?

In bipolar mode, the common-mode voltage (COM) is set to VREFIN/2. This configuration allows the ADC to measure differential input voltages ranging from -VREFIN/2 to +VREFIN/2.

What is the function of the SHDN pin?

The SHDN pin controls the shutdown state. Pulling it low reduces supply current to a maximum of 10µA. Pulling it high shuts down the internal reference while keeping the device operational.

Can the device operate without an external clock?

Yes, the device supports an internal clock mode. In this mode, the conversion time is approximately 25µs, allowing the processor to read data at its own convenience using the serial clock.