Analog Devices Inc./Maxim Integrated MAX11254ATJ/V+

Overview

MAX11254ATJ/V+ from Maxim Integrated is a 24-bit, 6-channel delta-sigma ADC with integrated programmable gain amplifier (PGA), SPI interface, 64ksps max sample rate, 6.2nV/√Hz input-referred noise, and AEC-Q100 qualification for automotive use. It operates from single 2.7V–3.6V or split ±1.8V analog supplies and supports precision DC measurements in battery-powered instrumentation and weigh scales.

For engineers reviewing the MAX11254ATJ/V+ datasheet, MAX11254ATJ/V+ pinout, MAX11254ATJ/V+ application, or MAX11254ATJ/V+ equivalent, key selection factors include PGA gain programmability (1x–128x), 133dB SNR at 50sps, -40°C to +125°C operation, TQFN-32 package, and support for synchronized multi-ADC systems via GPIO1/SYNC.

Technical Context

The MAX11254ATJ/V+ employs a fourth-order delta-sigma modulator with a variable-decimation SINC digital filter, enabling selectable data rates from 1.9sps to 64ksps in continuous mode. Its built-in sequencer automates channel scanning, conversion delay, and math operations for sensor monitoring without host intervention.

It integrates a low-noise, rail-to-rail input PGA (1x–128x) with dedicated CAPP/CAPN filter pins, and supports both internal 8.192MHz oscillator and external clock modes. The device features dual supply domains (AVDD/AVSS and DVDD), independent power states (Active/Standby/Sleep), and robust fault detection including overrange reporting in the status register.

Key Specifications

Pinout & Package

MAX11254ATJ/V+ is housed in a 5mm × 5mm, 32-pin TQFN package with exposed pad (EP) connected to AVSS. Pin functions are fully defined per Maxim's official pin description table and validated for automotive-grade thermal and EMI performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar delta-sigma ADC applications.

Compared with ADS1263IPBSR and AD7177-2BRUZ, the MAX11254ATJ/V+ uniquely balances 24-bit precision, 6-channel integration, PGA flexibility, AEC-Q100 qualification, and ultra-low sleep current - making it optimal for cost-sensitive, high-reliability embedded sensing where all four attributes are concurrently required.

Availability

MAX11254ATJ/V+ is available at Aetrix Electronics and suitable for industrial weigh scales, automotive pressure sensors, and battery-powered instrumentation requiring stable component supply across long production lifecycles.

Supply support for MAX11254ATJ/V+ 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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.

The MAX11254ATJ/V+ belongs to Maxim's precision delta-sigma ADC product line, engineered specifically for high-dynamic-range, low-power sensor signal conditioning in harsh environments - emphasizing AEC-Q100 compliance, integrated PGA flexibility, and autonomous operation.

FAQ

What is the maximum data rate supported by the MAX11254ATJ/V+ in continuous conversion mode?

The MAX11254ATJ/V+ supports up to 64ksps in continuous conversion mode. This rate is achieved using the SINC filter's full decimation capability and is validated across the full -40°C to +125°C operating range. At lower data rates (e.g., 50sps), the device delivers 133dB SNR, trading speed for enhanced resolution and noise rejection.

Does the MAX11254ATJ/V+ require an external reference voltage?

Yes, the MAX11254ATJ/V+ requires an external differential reference applied across REFP and REFN pins. It accepts references from 1.5V to VAVDD (max 3.6V), with common-mode voltage constrained to 0.75V to (VAVDD − 0.75V). No internal reference is provided - this design ensures system-level reference stability and ratiometric accuracy with sensor excitation sources.

How does the PGA on the MAX11254ATJ/V+ improve interface with high-impedance sensors?

The MAX11254ATJ/V+'s PGA provides high-input-impedance buffering (±1nA input bias current) and programmable gain (1x–128x), isolating sensitive sensors (e.g., thermocouples, piezoresistive elements) from the switched-capacitor sampling network. This prevents signal loading, preserves dynamic range, and enables direct connection without external op-amps - reducing bill-of-materials and board area.

Is the MAX11254ATJ/V+ pin-compatible with other devices in the MAX1125x family?

No, the MAX11254ATJ/V+ is not pin-compatible with earlier MAX11252 or MAX11253 variants. While sharing architectural similarities, its 32-pin TQFN package, GPIO/SYNC dual-function pins, and GPO/GPOGND configuration are unique to the MAX11254ATJ/V+. Migration requires PCB layout revision and firmware adaptation for register mapping and timing sequences.

What power supply configurations does the MAX11254ATJ/V+ support for automotive applications?

The MAX11254ATJ/V+ supports both single-supply (2.7V–3.6V AVDD with AVSS = 0V) and split-supply (±1.8V AVDD/AVSS) operation. In split mode, the analog inputs can swing below ground - critical for bipolar sensor outputs in automotive pressure and position sensing. Digital supply (DVDD) operates independently from 1.7V to 3.6V, allowing seamless interfacing with 1.8V or 3.3V microcontrollers.