Analog Devices Inc./Maxim Integrated MAX1027BEEE+

Overview

MAX1027BEEE+ 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 2.5V reference (±30ppm/°C drift), and 16-entry FIFO. It supports 8 single-ended or 4 true differential input channels in unipolar/bipolar modes and operates from a single +3V supply consuming 1.05mA at full rate - used in industrial data loggers for multi-sensor voltage and ambient temperature monitoring.

For engineers reviewing the MAX1027BEEE+ datasheet, MAX1027BEEE+ pinout, MAX1027BEEE+ application, or MAX1027BEEE+ equivalent, this page delivers verified electrical specs, QSOP-16 package mapping, SPI/QSPI/MICROWIRE timing compliance, FIFO buffer behavior, and real-world substitution guidance - all validated against Maxim's official 19-2854 Rev 5 datasheet.

Technical Context

The MAX1027BEEE+ implements a fully differential successive-approximation register (SAR) ADC architecture with on-chip track-and-hold, supporting both internally clocked (4.4MHz ±10%) and externally clocked (up to 10MHz SCLK) conversion modes. Its analog front-end accepts configurable single-ended or true differential inputs across eight AIN pins (AIN0–AIN7), with REF+/REF− enabling external differential reference or internal 2.5V reference selection.

It integrates a dedicated temperature-sensing path using an on-die sensor digitized in two's complement format at 1/8°C resolution, independent of voltage channel conversions. The 16-deep FIFO buffers ADC results and temperature readings, enabling burst acquisition without serial bus contention - critical for deterministic sampling in PLC I/O modules and battery-powered telemetry nodes.

Key Specifications

Pinout & Package

MAX1027BEEE+ uses a 16-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch) with gull-wing leads and RoHS-compliant matte tin plating. Pin 1 is marked by a beveled corner; exposed pad is absent (unlike TQFN variants).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7957IRHBT and AD7912BRMZ, the MAX1027BEEE+ uniquely combines 10-bit accuracy, true differential input support, integrated temperature sensing, and 16-deep FIFO in a single +3V QSOP package - making it optimal for resource-constrained embedded systems requiring concurrent analog and thermal data acquisition without external support components.

Availability

MAX1027BEEE+ is available at Aetrix Electronics and suitable for industrial data loggers, patient monitoring devices, environmental sensor nodes, and automated test equipment requiring stable component supply across extended temperature ranges.

Supply support for MAX1027BEEE+ 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 - emphasizing integration, reliability, and low-power operation.

The MAX1027BEEE+ belongs to Maxim's precision data-acquisition ADC family, engineered specifically for space- and power-constrained systems needing multichannel voltage measurement plus embedded thermal monitoring in a single chip.

FAQ

What is the operating temperature range for the MAX1027BEEE+?

The MAX1027BEEE+ is specified for continuous operation from –40°C to +85°C, matching its "E" grade suffix. This extended industrial temperature range is validated across all key parameters including INL, DNL, reference stability, and temperature sensor accuracy - ensuring reliable performance in outdoor sensor enclosures and factory-floor PLCs without derating.

Does the MAX1027BEEE+ support true differential analog inputs?

Yes, the MAX1027BEEE+ supports true differential analog inputs using matched channel pairs (e.g., AIN0/AIN1, AIN2/AIN3, etc.) with full common-mode rejection. Unlike pseudo-differential architectures, its internal track-and-hold acquires both IN+ and IN− simultaneously, enabling accurate bipolar signal measurement (±VREF/2 range) and noise cancellation in motor control feedback loops.

How does the internal FIFO function in the MAX1027BEEE+?

The MAX1027BEEE+ contains a 16-entry FIFO that stores complete 16-bit conversion results (including temperature readings). When enabled, it allows up to 16 consecutive conversions to execute autonomously - freeing the host microcontroller from constant polling. Data is read MSB-first via DOUT after each CS falling edge, with oldest entries output first; overflow overwrites the oldest entry.

Can the MAX1027BEEE+ use an external reference voltage?

Yes, the MAX1027BEEE+ accepts an external differential reference via REF+ (1.0V to VDD+50mV) and REF− (0–500mV) pins. When REFSEL bits are set to '01' in the setup register, the internal 2.5V reference is disabled and the external reference determines full-scale range - useful when matching system-level reference standards or improving PSRR in noisy environments.

What is the purpose of the CNVST/AIN7 pin on the MAX1027BEEE+?

The CNVST/AIN7 pin serves dual roles: as an active-low conversion start trigger (in clock modes 00/01) or as analog input channel AIN7 (when configured as such in the setup register). It cannot perform both functions simultaneously - selection is controlled by the DIFFSEL and CHSEL bits. In standalone sensor nodes, CNVST mode enables hardware-triggered sampling without serial command overhead.