Analog Devices Inc./Maxim Integrated MAX11213EEE+T

Overview

MAX11213EEE+T from Maxim Integrated is a 16-bit, single-channel, ultra-low-power delta-sigma ADC with programmable gain (1–128), four SPI-controllable GPIOs, and integrated input/reference buffers. It delivers <300 µA active current, 16-bit noise-free resolution at 10–120 sps, and >100 dB 50/60 Hz line-noise rejection-optimized for high-impedance sensor interfaces in 4–20 mA industrial loops.

For engineers reviewing the MAX11213EEE+T datasheet, MAX11213EEE+T pinout, MAX11213EEE+T application, or MAX11213EEE+T equivalent, this device supports precision low-power measurement of temperature, pressure, and weigh-scale transducers where dynamic range, ESD robustness (±2 kV), and self-calibration capability are critical selection criteria.

Technical Context

The MAX11213EEE+T implements a third-order delta-sigma modulator with SINC4 digital filtering, enabling software-selectable data rates (0.83–480 sps) and dual internal oscillator options (2.048 MHz for 50 Hz rejection; 2.4576 MHz for 60 Hz rejection). Its programmable gain is fully digital-applied post-conversion-preserving 16-bit output word length while scaling effective input range.

It features independent signal and reference input buffers (enabling use with >1 MΩ sources), on-demand offset/gain self-calibration (200 ms), and system calibration support. The SPI interface configures all operating modes-including unipolar/bipolar range, buffer enable, and GPIO direction/output states-via three control registers (CTRL1–CTRL3).

Key Specifications

Pinout & Package

MAX11213EEE+T is housed in a 16-pin QSOP package (5.3 mm × 10.2 mm, 0.65 mm pitch), compatible with standard surface-mount assembly processes and offering thermal performance suitable for -40°C to +85°C industrial operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-resolution, low-power ADC applications.

Compared with ADS124S08IPWR and AD7172-2BRUZ, MAX11213EEE+T uniquely balances 16-bit precision, sub-300 µA operation, four integrated GPIOs, and digital programmable gain-making it optimal for space- and power-constrained sensor front-ends where flexibility and longevity are prioritized over raw bit depth.

Availability

MAX11213EEE+T is available at Aetrix Electronics and suitable for industrial sensor transmitters, portable weigh scales, battery-powered environmental monitors, and low-power process control systems requiring stable component supply and long-term manufacturability.

Supply support for MAX11213EEE+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for industrial, medical, and communications applications, emphasizing low power, high integration, and robust performance.

The MAX112xx family targets ultra-low-power, high-dynamic-range measurement systems-specifically engineered for battery-operated and loop-powered sensor interfaces demanding DC accuracy, line-noise immunity, and minimal external components.

FAQ

What is the maximum data rate supported by MAX11213EEE+T in single-cycle conversion mode?

MAX11213EEE+T supports up to 120 sps in single-cycle conversion mode when configured with LINEF = 0 (2.4576 MHz internal oscillator). At this rate, the device delivers true zero-latency output with guaranteed 16-bit noise-free resolution and 570 nV_RMS noise. The data rate is software-selectable via the RATE[2:0] bits and remains stable across the full -40°C to +85°C operating range.

Does MAX11213EEE+T require external components for its internal oscillator to function?

No, MAX11213EEE+T includes a factory-trimmed internal oscillator that operates at either 2.048 MHz or 2.4576 MHz depending on the LINEF bit setting-requiring no external crystals, capacitors, or resistors. This eliminates BOM cost and layout area while ensuring consistent timing performance across temperature and voltage variations, as verified in Figures 10 and 11 of the official datasheet.

How does the programmable gain feature of MAX11213EEE+T differ from analog gain stages?

MAX11213EEE+T implements digital programmable gain (1–128) applied after the delta-sigma modulator but before the SINC4 filter-preserving full 16-bit output word length and avoiding analog path nonlinearity or noise amplification. Unlike analog gain, this approach maintains constant input-referred noise and avoids gain-dependent INL drift, making it ideal for wide-dynamic-range sensor interfacing without hardware reconfiguration.

Can MAX11213EEE+T operate with separate analog and digital supply voltages?

Yes, MAX11213EEE+T supports independent analog (AVDD: 2.7–3.6 V) and digital (DVDD: 1.7–3.6 V) supplies, enabling mixed-voltage system design. This allows interfacing with 1.8 V microcontrollers while powering the modulator and buffers from a 3.3 V rail-reducing digital switching noise coupling into the analog path and improving overall SNR performance in noise-sensitive applications.

What calibration options are available on MAX11213EEE+T, and how long do they take?

MAX11213EEE+T provides three calibration levels: (1) On-demand self-calibration (200 ms), correcting internal offset/gain; (2) System zero/full-scale calibration (100 ms each), using external reference signals; and (3) SPI-programmable offset/gain registers for custom correction. All calibrations are initiated via SPI command byte (CAL1/CAL0 bits) and store results in dedicated on-chip registers-no external memory required.