Analog Devices Inc./Maxim Integrated MAX11207EEE+T

Overview

MAX11207EEE+T from Maxim Integrated is a 20-bit, single-channel, ultra-low-power delta-sigma ADC optimized for high-dynamic-range sensor measurement in 4–20mA industrial loops. It delivers 20-bit noise-free resolution at 10sps, <300µA total operating current, >100dB 50/60Hz line-noise rejection, and four SPI-controllable GPIOs for external multiplexer control - enabling precision analog front-end design in battery-powered instrumentation and weigh scales.

For engineers reviewing the MAX11207EEE+T datasheet, MAX11207EEE+T pinout, MAX11207EEE+T application, or MAX11207EEE+T equivalent, key selection criteria include its differential input architecture with optional buffers, programmable LINEF oscillator (2.048/2.4576MHz), SINC4 digital filter, ±2kV ESD protection, and QSOP-16 package compatibility with industrial temperature range (-40°C to +85°C).

Technical Context

The MAX11207EEE+T implements a third-order delta-sigma modulator with SINC4 digital filtering, supporting both continuous and zero-latency single-cycle conversion modes. Its internal oscillator eliminates external timing components and provides selectable 2.048MHz (optimal 50Hz rejection) or 2.4576MHz (optimal 60Hz rejection) frequencies via the LINEF bit.

It features fully differential analog inputs (AINP/AINN) and reference inputs (REFP/REFN), configurable buffered or unbuffered operation, and on-demand self- or system-level offset/gain calibration. Unlike the MAX11206, it lacks digital programmable gain - confirming its role as the fixed-gain variant in the family.

Key Specifications

Pinout & Package

MAX11207EEE+T is housed in a lead(Pb)-free, RoHS-compliant 16-pin QSOP package (5.3mm × 10.2mm, 0.635mm pitch), suitable for automated assembly and industrial PCB layouts requiring thermal and mechanical stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX11206EEE+T, the MAX11207EEE+T removes gain configuration complexity and improves gain-related INL consistency; versus ADS124S08IPW, it trades channel count and on-chip features for lower quiescent current and smaller footprint in dedicated single-sensor nodes.

Availability

MAX11207EEE+T is available at Aetrix Electronics and suitable for industrial 4–20mA loop sensors, portable weigh scales, and high-accuracy temperature monitoring systems requiring stable component supply across extended production lifecycles.

Supply support for MAX11207EEE+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) is a semiconductor leader specializing in precision analog, mixed-signal, and high-reliability ICs for industrial, medical, and automotive applications.

The MAX1120x series was designed specifically for ultra-low-power, high-dynamic-range sensor digitization in constrained-energy environments - emphasizing noise immunity, calibration flexibility, and minimal external component count.

FAQ

What is the maximum data rate supported by the MAX11207EEE+T in single-cycle conversion mode?

The MAX11207EEE+T supports up to 120sps in single-cycle conversion mode when configured with LINEF = 0 (2.4576MHz internal oscillator). At this rate, it delivers 19-bit noise-free resolution and zero data latency - ideal for responsive industrial control feedback loops where real-time updates are critical. The device maintains full 20-bit resolution down to 10sps.

Does the MAX11207EEE+T include programmable gain like the MAX11206EEE+T?

No, the MAX11207EEE+T does not include digital programmable gain. It is the fixed-gain variant in the MAX11206/MAX11207 family. Gain functionality is exclusive to the MAX11206EEE+T, which supports 1× to 128× digitally selectable settings. The MAX11207EEE+T simplifies firmware and improves gain-related INL consistency by removing this feature.

How does the MAX11207EEE+T achieve >100dB 50Hz/60Hz rejection without external filters?

The MAX11207EEE+T achieves >100dB 50Hz/60Hz rejection through its integrated SINC4 digital filter synchronized to its internal oscillator. When LINEF = 1 (2.048MHz), the filter places a deep null at 50Hz; when LINEF = 0 (2.4576MHz), the null aligns with 60Hz. This architecture eliminates external passive or active notch filters while guaranteeing rejection across temperature and supply variations.

Can the GPIO pins on the MAX11207EEE+T drive analog switches directly?

Yes, the four GPIO pins (GPIO1–GPIO4) on the MAX11207EEE+T are CMOS-compatible digital outputs controllable via the SPI-accessible CTRL2 register. They can directly drive logic inputs of analog switches such as the MAX313 quad SPST device, enabling synchronized break-before-make channel selection without additional level-shifting or driver ICs.

What calibration options are available on the MAX11207EEE+T, and how long do they take?

The MAX11207EEE+T supports three calibration levels: self-calibration (200ms, corrects internal offset/gain), system zero-scale calibration (100ms, uses external 0V input), and system full-scale calibration (100ms, uses external full-scale voltage). All are initiated via SPI command byte with CAL1/CAL0 bits and write results to dedicated on-chip registers (SCOC, SCGC, SOC, SGC).