Analog Devices Inc./Maxim Integrated MAX1226BCEE+T

Overview

MAX1226BCEE+T from Maxim Integrated is a 12-bit, 300ksps serial analog-to-digital converter with integrated temperature sensor (±1.2°C error over -40°C to +85°C), on-chip 16-entry FIFO, and internal 4.096V reference. It features 8 single-ended or 4 true differential analog inputs, SPI/QSPI/MICROWIRE-compatible 3-wire interface, and operates from a single +5V supply consuming 2.3mA at full speed. It is used in industrial data-acquisition systems requiring synchronized voltage and temperature sampling.

For engineers reviewing the MAX1226BCEE+T datasheet, MAX1226BCEE+T pinout, MAX1226BCEE+T application, or MAX1226BCEE+T equivalent, this page delivers verified specifications, QSOP-16 package mapping, real-world use cases in system supervision and patient monitoring, and two validated alternative ADCs with documented functional and application-level differences.

Technical Context

The MAX1226BCEE+T implements a fully differential successive-approximation register (SAR) architecture with integrated track-and-hold, supporting both unipolar and bipolar differential input ranges (±2.048V) and single-ended operation (0–4.096V). Its internal oscillator enables autonomous scan mode without external timing control.

It uses an internal 4.096V reference with ±20ppm/°C drift and supports external differential reference inputs via REF+/REF− pins. Conversion results are output in binary (unipolar) or two's complement (bipolar/temperature) format over a 10MHz SPI-compatible serial interface with programmable clock modes (CKSEL[1:0]).

Key Specifications

Pinout & Package

MAX1226BCEE+T is housed in a 16-pin QSOP (Quarter Size Outline Package) with 0.65mm lead pitch and RoHS-compliant matte-tin plating. The package measures 10.3mm × 3.91mm × 1.45mm and is optimized for automated assembly and thermal performance in dense PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit SAR ADC applications.

Compared with MAX1226BCEE+T, ADS7822U sacrifices 4 bits of resolution and all integrated features for lower cost, while AD7490BRUZ trades temperature sensing and FIFO buffering for raw speed and channel count - making MAX1226BCEE+T optimal for compact, self-contained, thermally aware data acquisition.

Availability

MAX1226BCEE+T is available at Aetrix Electronics and suitable for industrial process monitoring, patient vital sign acquisition, automated test equipment, and energy metering applications requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.

Supply support for MAX1226BCEE+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, mixed-signal, and power management ICs for industrial, medical, and communications applications.

The MAX1226BCEE+T belongs to Maxim's high-accuracy SAR ADC product line, engineered for embedded systems needing integrated signal conditioning, temperature awareness, and low-power serial data acquisition without external support components.

FAQ

What is the operating temperature range for the MAX1226BCEE+T?

The MAX1226BCEE+T is specified for operation from 0°C to +70°C, as indicated by the "B" grade and "C" temperature suffix in its ordering code. This commercial-grade range is validated across all electrical parameters including INL, DNL, reference stability, and temperature sensor accuracy. The device maintains ±1 LSB linearity and ±1.2°C thermal measurement error within this span, making it suitable for office, lab, and non-extreme industrial environments.

Does the MAX1226BCEE+T require an external reference voltage?

No, the MAX1226BCEE+T includes a factory-trimmed internal 4.096V reference with ±1.7% initial accuracy and ±20ppm/°C temperature coefficient - sufficient for most ratiometric and general-purpose measurements. An external differential reference can be applied via REF+ and REF− pins only if higher precision or custom scaling is required; doing so disables the internal reference and necessitates external biasing.

How many analog input channels does the MAX1226BCEE+T support?

The MAX1226BCEE+T supports 8 single-ended analog inputs (AIN0–AIN7) or 4 true differential input pairs (e.g., AIN0/AIN1, AIN2/AIN3, etc.). Channel configuration is controlled via the setup register, and pins AIN6 and AIN7 double as REF− and CNVST respectively - meaning all 8 channels are accessible only when those functions are disabled in software.

Can the MAX1226BCEE+T perform simultaneous sampling of multiple channels?

No, the MAX1226BCEE+T uses a single SAR core with a multiplexed input stage and does not support true simultaneous sampling. However, its 300ksps conversion rate and 16-entry FIFO enable rapid sequential sampling across all 8 channels with sub-microsecond inter-channel delay - effectively capturing correlated signals in scan mode for applications like motor phase current profiling.

What package type is used for the MAX1226BCEE+T?

The MAX1226BCEE+T is supplied in a 16-pin QSOP (Quarter Size Outline Package) with 0.65mm lead pitch, marked "BCEE+T" per Maxim's ordering nomenclature. This RoHS-compliant, lead-free package features gull-wing leads and is compatible with standard reflow soldering profiles - widely adopted in industrial PCB assembly for its balance of density, thermal performance, and manufacturability.