MAX11321ATJ+

Analog To Digital Converters (ADC) Overview

The MAX11321ATJ+ is a 10-bit, 4-channel successive approximation register (SAR) analog-to-digital converter (ADC) from Analog Devices/Maxim Integrated. It operates at a sampling rate of 1Msps with a full-linear bandwidth of 500kHz. The device supports single-ended, fully differential, and pseudo-differential input configurations. Key electrical parameters include ±0.4 LSB INL/DNL, 61.5dB SNR, and 83.4dB SFDR. It functions on a 2.35V to 3.6V supply, consuming 5.4mW at 1Msps. The component features post-mux external signal conditioning access via AOP/AON pins and utilizes a 3-wire serial interface.

Analog To Digital Converters (ADC) Feature Summary

• Post-Mux External Signal Conditioning Access: Externally accessible multiplexer output (AOP, AON) and ADC input (AIP, AIN) allow for flexible external signal conditioning between the mux and ADC.
• SampleSet Technology: User-programmable channel sequencer in external clock mode allows up to 256 user-defined channels per sequence, reducing microcontroller overhead.
• Internal Clock Mode Features: Includes an integrated 16-entry FIFO for high-speed data buffering and internal averaging to improve SNR for noisy signals.
• Low Power Consumption: Consumes only 5.4mW at 1Msps with 3V supplies and offers a full shutdown current of 2μA.

Analog To Digital Converters (ADC) Applications

• High-Speed Data Acquisition Systems
• Industrial Control Systems
• Medical Instrumentation
• Battery-Powered Instruments

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix 'ATJ+' against the manufacturer's official documentation to confirm package type (TQFN-32 EP) and temperature range (-40°C to +125°C). Ensure compatibility with the required channel count (4 channels for MAX11321) and resolution (10-bit). Cross-reference pinout details with the latest datasheet revision to avoid integration errors.

Analog To Digital Converters (ADC) Selection Notes

Select the MAX11321ATJ+ when a 10-bit resolution and 4-channel configuration are required. Compare against MAX11322/MAX11325/MAX11328 if 12-bit resolution or higher channel counts (8/16) are needed, noting that those variants offer improved dynamic performance (72.3dB SNR). Ensure the application can accommodate the 2.35V to 3.6V analog supply and 1.5V to 3.6V digital I/O supply requirements.

Analog To Digital Converters (ADC) Part Context

The MAX11321ATJ+ belongs to the MAX11321–MAX11328 family of 1Msps SAR ADCs. This family shares common architectural features such as SampleSet technology, AutoShutdown, and post-mux signal access. The MAX11321 specifically denotes the 10-bit resolution variant with 4 analog input channels, distinguishing it from the 12-bit variants (MAX11322, MAX11325, MAX11328) which offer higher accuracy but potentially different power/performance trade-offs.

Analog To Digital Converters (ADC) Replacement Considerations

Direct functional substitutes within the same family include MAX11322ATJ+, MAX11325ATJ+, and MAX11328ATJ+. Note that these replacements provide 12-bit resolution and may have different channel counts (8 or 16), requiring verification of pin compatibility and software register adjustments. No other cross-family replacements are confirmed by the provided source material.