MAX1246BEEE

Analog To Digital Converters (ADC) Overview

The MAX1246BEEE is a low-power, serial 12-bit analog-to-digital converter (ADC) housed in a 16-pin QSOP package. It integrates a 4-channel multiplexer, high-bandwidth track/hold circuit, and successive-approximation conversion logic. Operating from a single +2.7V to +3.6V supply, it features an internal 2.5V reference with a ±1.5% adjustment range via the REFADJ pin. The device supports a 4-wire serial interface compatible with SPI, QSPI, and Microwire protocols. Key electrical specifications include a sampling rate of 133ksps, a maximum power dissipation of 667mW in the QSOP package, and an operating temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Integrates a 4-channel multiplexer with software-configurable unipolar or bipolar input modes for flexible signal acquisition.
• Features a built-in 2.5V voltage reference amplifier that allows external adjustment within a ±1.5% range.
• Supports direct connection to standard digital interfaces including SPI, QSPI, and Microwire without requiring external logic gates.
• Includes a dedicated hardware shutdown pin and software-selectable power-down states to minimize current consumption.

Analog To Digital Converters (ADC) Applications

• Portable data logging systems
• Medical instrumentation
• Pen digitizers
• Battery-powered instruments

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'EEE' confirms the 16-pin QSOP package and industrial temperature grade (-40°C to +85°C). Confirm the 'B' designation indicates the specified linearity accuracy class (+/- 1 LSB INL/DNL). Ensure the component is sourced as lead-free ('+') compliant if required by assembly standards. Cross-reference the manufacturer's latest documentation for any obsolescence notices or lifecycle changes.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 12-bit resolution and 133ksps sampling rate are required in a compact surface-mount form factor. The internal reference simplifies design compared to the MAX1247 variant, which requires an external reference. Verify that the single-ended or pseudo-differential input configurations meet system requirements. Ensure the serial clock frequency remains within the 0MHz to 2MHz limit for proper data shifting.

Analog To Digital Converters (ADC) Part Context

This part belongs to the MAX1246/MAX1247 family of low-power, serial ADCs. It shares architectural similarities with the MAX146/MAX147 but offers only four channels instead of eight. The MAX1246 is distinguished from the MAX1247 by its integrated internal voltage reference, whereas the MAX1247 relies on an external reference source. Both utilize the same 16-pin QSOP footprint.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX1247AEEE+ serves as a functional substitute if an external reference is acceptable, though it lacks the internal 2.5V reference found in the MAX1246. Verify pin compatibility and software register alignment before substitution. No other direct cross-model replacements are confirmed in public documentation.