Analog Devices Inc./Maxim Integrated MAX1039LEEE

Overview

MAX1039LEEE from Maxim Integrated is a low-power, 8-bit, 12-channel analog-to-digital converter (ADC) with integrated track/hold, 2.048V internal reference, I²C-compatible 2-wire serial interface, and operation from a single 2.7V–3.6V supply. It delivers 188ksps maximum sampling rate with only 350µA supply current and supports software-configurable unipolar/bipolar and single-ended/pseudo-differential input modes for precision sensor and system monitoring applications.

For engineers reviewing the MAX1039LEEE datasheet, MAX1039LEEE pinout, MAX1039LEEE application, or MAX1039LEEE equivalent, this page provides verified technical context, validated pin functions, confirmed 16-pin QSOP package mapping, real-world use-value metrics (e.g., ±1 LSB TUE, 75 dB CMRR), and two rigorously cross-checked alternative parts - all extracted from Maxim's official documentation and ordering guide.

Technical Context

The MAX1039LEEE employs successive-approximation architecture with an internal switched-capacitor DAC and track/hold circuitry. Its 12-channel analog multiplexer supports channel-scan mode with FIFO buffering, enabling automated sequential conversions across AIN0–AIN11.

It operates in either internal clock mode (2.25MHz) or external clock mode (up to 1.7MHz I²C high-speed mode), with acquisition time dependent on source impedance and clock configuration. Input range is programmable via internal 2.048V reference or external 1V–VDD reference, and conversion results are delivered as 8-bit serial data over I²C with slave address 1100101.

Key Specifications

Pinout & Package

MAX1039LEEE is housed in a 16-pin QSOP package (5.3 mm × 10.2 mm, 0.65 mm pitch), optimized for space-constrained industrial and portable PCB layouts. Thermal performance supports continuous operation at +85°C ambient with 666.7 mW max power dissipation at +70°C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit multichannel ADC applications.

Compared with MAX1039LEEE, ADS7822U trades channel count and power efficiency for interface flexibility, while MAX1139EEE+ retains identical footprint and protocol but upgrades resolution at the cost of higher supply current - making MAX1039LEEE optimal for cost- and power-sensitive 8-bit multichannel sensing.

Availability

MAX1039LEEE is available at Aetrix Electronics and suitable for handheld portable applications, medical instruments, and battery-powered test equipment requiring stable component supply, RoHS-compliant packaging, and guaranteed extended industrial temperature operation (-40°C to +85°C).

Supply support for MAX1039LEEE 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 portable applications.

The MAX1036–MAX1039 family was designed for ultra-low-power, multichannel data acquisition in space- and energy-constrained systems - emphasizing integration (T/H, reference, clock, I²C), configurability, and guaranteed performance across harsh operating conditions.

FAQ

What is the supply voltage range for MAX1039LEEE?

The MAX1039LEEE operates from a single 2.7V to 3.6V supply. This range is strictly defined in the Absolute Maximum Ratings and Electrical Characteristics tables; operation outside this window risks parametric noncompliance or damage. The device draws 350µA at 188ksps within this range and features internal regulation to maintain reference and conversion accuracy across the full span. Always bypass VDD with a 0.1µF ceramic capacitor placed near the MAX1039LEEE pin.

Does MAX1039LEEE support pseudo-differential input mode?

Yes, MAX1039LEEE supports pseudo-differential input mode via the SGL/DIF bit in its configuration byte. In this mode, it digitizes the difference between a selected '+' input (e.g., AIN0) and a selected '–' input (e.g., AIN11/REF), provided the '–' input remains stable within ±0.5 LSB during conversion. The device does not perform true differential sampling - only the '+' input is tracked by the internal T/H circuit - so proper decoupling of the '–' input is essential for accuracy.

What is the I²C slave address of MAX1039LEEE?

The MAX1039LEEE has a fixed 7-bit I²C slave address of 1100101 (0x65 in hexadecimal), as confirmed in the Ordering Information table and Pin Configurations section. This address is factory-programmed and distinct from the MAX1036/MAX1037 (0x64). The R/W bit (LSB) determines direction: write = 0x65, read = 0x65 | 0x01 = 0x66. High-speed mode activation requires a separate master code (0x08) before addressing.

How does AutoShutdown™ work in MAX1039LEEE?

AutoShutdown™ in MAX1039LEEE automatically powers down the ADC core, reference buffer, and internal clock between conversions, reducing supply current to less than 1µA. It activates after completion of each conversion cycle unless disabled via the CLK bit in the setup register. This feature is transparent to the host - no software intervention is needed - and resumes full operation on the next I²C command, making it ideal for duty-cycled sensing in battery-powered systems.

Can MAX1039LEEE use an external reference voltage?

Yes, MAX1039LEEE accepts an external reference voltage from 1.0V to VDD applied to the AIN3/REF or AIN11/REF pin, as specified in the Electrical Characteristics table. When using an external reference, the internal 2.048V reference is disabled, and REF-related leakage (±1µA) and source impedance (675Ω) become relevant. External reference operation maintains full 8-bit performance but requires careful PCB layout to minimize noise coupling into the REF node.