Analog Devices Inc./Maxim Integrated MAX1026BEEE+

Overview

MAX1026BEEE+ from Maxim Integrated is a 10-bit, 300ksps serial analog-to-digital converter with integrated temperature sensor (±1.2°C error over –40°C to +85°C), internal 4.096V reference, and 16-entry FIFO. It supports 8 single-ended or 4 true differential input channels in unipolar/bipolar modes and operates from a single +5V supply. It targets precision system supervision and industrial data acquisition where low-power, on-chip signal conditioning and embedded thermal monitoring are required.

For engineers reviewing the MAX1026BEEE+ datasheet, MAX1026BEEE+ pinout, MAX1026BEEE+ application, or MAX1026BEEE+ equivalent, this page delivers verified specifications, QSOP-16 package mapping, SPI/QSPI/MICROWIRE™ interface timing, FIFO buffer behavior, and real-world use cases in patient monitoring and industrial control systems - all grounded in Maxim's official datasheet Rev 4 (April 2011).

Technical Context

The MAX1026BEEE+ implements a fully differential successive-approximation register (SAR) ADC core with integrated track-and-hold, supporting both single-ended and true differential inputs. Its internal oscillator enables autonomous conversion timing in clock modes 00/01/10, while mode 11 accepts external SCLK up to 10MHz for precise sampling control.

It integrates an on-die temperature sensor with 1/8°C resolution and two's-complement output, always referenced to its internal 4.096V bandgap reference. The 16-deep FIFO buffers ADC results and temperature readings independently, allowing burst acquisition without serial bus contention - critical for microcontroller-based monitoring systems.

Key Specifications

Pinout & Package

MAX1026BEEE+ is housed in a 16-pin QSOP (Quad Small Outline Package) with 0.65mm lead pitch and RoHS-compliant finish. The package measures 10.3mm × 3.91mm × 1.75mm and features gull-wing leads suitable for standard reflow assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit multichannel ADC with temperature sensing applications.

Compared with ADS7822U and AD7490BRUZ, the MAX1026BEEE+ uniquely combines 10-bit accuracy, integrated temperature sensing, FIFO buffering, and multi-protocol serial interface in a single 16-pin QSOP - reducing system-level component count and firmware overhead for embedded monitoring applications.

Availability

MAX1026BEEE+ is available at Aetrix Electronics and suitable for industrial control systems, patient monitoring devices, and environmental data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX1026BEEE+ 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 company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications markets.

The MAX1026BEEE+ belongs to Maxim's precision data acquisition product line, designed specifically for space-constrained, low-power systems needing integrated analog front-end functionality - including multichannel conversion, thermal awareness, and intelligent bus interfacing - without external support components.

FAQ

What is the operating temperature range for the MAX1026BEEE+?

The MAX1026BEEE+ is specified for operation from –40°C to +85°C, matching the "E" grade suffix in its part number. This extended industrial temperature range is validated across all key parameters including INL, DNL, reference stability, and temperature sensor accuracy (±1.2°C). The device maintains full functionality and guaranteed performance within this range without derating.

Does the MAX1026BEEE+ require an external reference voltage?

No, the MAX1026BEEE+ includes a precision internal 4.096V reference with ±20ppm/°C temperature coefficient, sufficient for 10-bit accuracy across its full temperature range. An external differential reference can be used via REF+ and REF– pins, but doing so disables the internal reference and requires external circuitry - the internal reference is mandatory for temperature measurements.

How many analog input channels does the MAX1026BEEE+ support?

The MAX1026BEEE+ supports 8 single-ended analog input channels (AIN0–AIN7) or 4 true differential pairs (AIN0/AIN1, AIN2/AIN3, AIN4/AIN5, AIN6/AIN7). Channel configuration is controlled via the setup register, and inputs shared with REF– or CNVST functions (e.g., AIN6, AIN7) must be explicitly assigned in software to avoid conflicts.

What is the purpose of the FIFO in the MAX1026BEEE+?

The 16-entry FIFO in the MAX1026BEEE+ buffers ADC conversion results and temperature readings independently, allowing up to 16 sequential conversions (or mixed ADC/temp samples) to complete autonomously before host readout. This eliminates serial bus contention during burst acquisition and enables low-power MCU sleep modes between FIFO reads - critical for energy-efficient data logging.

Can the MAX1026BEEE+ perform simultaneous sampling of multiple channels?

No, the MAX1026BEEE+ uses a single SAR ADC core with a multiplexed input stage and does not support true simultaneous sampling. It sequentially acquires channels in scan mode, with inter-channel skew determined by conversion time (≤2.7μs per sample) and acquisition time (0.6μs typical). For synchronized multi-channel capture, external sample-and-hold circuitry is required.