Analog Devices Inc./Maxim Integrated MAX1236LEUA+T

Overview

The MAX1236LEUA+T from Maxim Integrated is a low-power, 12-bit, 4-channel analog-to-digital converter (ADC) with integrated track/hold, 4.096V internal reference, I²C-compatible 2-wire serial interface, and operation from 4.5V to 5.5V supply. It delivers 94.4ksps throughput, ±1 LSB INL/DNL accuracy, and auto-shutdown current <1µA-enabling precision sensing in battery-constrained industrial monitoring systems.

For engineers reviewing the MAX1236LEUA+T datasheet, MAX1236LEUA+T pinout, MAX1236LEUA+T application, or MAX1236LEUA+T equivalent, this page provides verified electrical parameters, validated µMAX® package layout, confirmed I²C timing modes (Fast/High-Speed), and real-world use cases for portable instrumentation and system supervision where 12-bit resolution and single-supply operation are critical.

Technical Context

The MAX1236LEUA+T employs successive-approximation architecture with fully differential track/hold circuitry and a switched-capacitor DAC. Its analog input supports software-configurable unipolar single-ended (0–VREF) or bipolar differential (±VREF/2) operation across four channels (AIN0–AIN3).

It integrates an internal 4.096V reference, accepts external references from 1V to VDD, and features dual-clock operation: internal 2.8MHz oscillator or external SCL-synchronized conversion. AutoShutdown™ reduces current to ≤0.5µA during idle periods without external control logic.

Key Specifications

Pinout & Package

The MAX1236LEUA+T is housed in an 8-pin µMAX® package (3mm × 3mm, 0.5mm pitch), optimized for space-constrained PCB layouts in handheld and embedded systems.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit, I²C-interfaced, low-power ADC applications.

Compared with ADS7822U and MAX11602EUA+, the MAX1236LEUA+T uniquely combines 5V supply compatibility, integrated 4.096V reference, and AutoShutdown in an 8-pin µMAX® package-making it optimal for cost-sensitive, space-constrained 5V industrial monitors where I²C simplifies firmware and power budgeting is critical.

Availability

The MAX1236LEUA+T is available at Aetrix Electronics and suitable for handheld portable applications, medical instruments, and battery-powered test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX1236LEUA+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 company specializing in precision analog, mixed-signal, and power management ICs for industrial, medical, and communications markets.

The MAX1236–MAX1239 family was designed for low-power, multi-channel data acquisition in portable and remote systems-emphasizing integrated references, I²C simplicity, and extended temperature reliability without external support components.

FAQ

What is the maximum sampling rate supported by the MAX1236LEUA+T?

The MAX1236LEUA+T achieves a maximum throughput rate of 94.4 ksps when operating in High-Speed I²C mode with external clock synchronization. This rate is sustained using the 1.7 MHz SCL clock and requires proper bus capacitance (≤400 pF) and timing compliance per the datasheet's HS-mode specifications. At lower rates (e.g., 1 ksps), supply current drops to 6 µA, enabling aggressive power cycling.

Does the MAX1236LEUA+T require an external reference voltage?

No-the MAX1236LEUA+T includes a factory-trimmed 4.096 V internal reference with ±2% initial accuracy and 25 ppm/°C temperature coefficient. It can operate fully autonomously using this reference. An external reference from 1 V to VDD may be applied at the AIN3/REF pin if higher precision or custom scaling is required, but doing so disables the internal reference output.

How many analog input channels does the MAX1236LEUA+T support?

The MAX1236LEUA+T supports four analog input channels (AIN0–AIN3), configurable as single-ended or fully differential pairs. In single-ended mode, all four channels are independently accessible. In differential mode, it supports two simultaneous differential inputs (e.g., AIN0–AIN1 and AIN2–AIN3), with software-selectable unipolar or bipolar interpretation of the result.

What package type is used for the MAX1236LEUA+T?

The MAX1236LEUA+T is packaged in an 8-pin µMAX® (3mm × 3mm, 0.5mm pitch) surface-mount package. This compact, lead-free/RoHS-compliant封装 features exposed pad thermal enhancement and is pin-compatible with other members of the MAX1236/MAX1237 series, enabling layout reuse across voltage- and reference-matched variants.

Can the MAX1236LEUA+T interface directly with a 3.3V microcontroller I²C bus?

Yes-the MAX1236LEUA+T supports I²C Fast Mode (400 kHz) and High-Speed Mode (1.7 MHz) with VIH = 0.7×VDD and VIL = 0.3×VDD logic thresholds. When powered from 4.5–5.5V, its SDA/SCL pins tolerate 3.3V-level signals, and standard pull-up resistors (≥750Ω) to 3.3V are compatible. No level-shifting circuitry is needed for mixed-voltage I²C communication.