Analog Devices Inc./Maxim Integrated MAX1036KEKA+T

Overview

MAX1036KEKA+T from Maxim Integrated is a low-power, 8-bit, 4-channel analog-to-digital converter with integrated track/hold, 4.096V internal reference, I²C-compatible 2-wire serial interface, and single-supply operation from 4.5V to 5.5V. It delivers 188ksps throughput with 350µA supply current and ±2 LSB total unadjusted error, targeting battery-powered test equipment and handheld portable systems requiring compact, precision signal digitization.

For engineers reviewing the MAX1036KEKA+T datasheet, MAX1036KEKA+T pinout, MAX1036KEKA+T application, or MAX1036KEKA+T equivalent, key selection criteria include its 8-pin SOT23 package, software-configurable unipolar/bipolar and single-ended/pseudo-differential input modes, internal clock support, and guaranteed operation across –40°C to +85°C.

Technical Context

The MAX1036KEKA+T employs successive-approximation architecture with integrated track/hold capacitor and switched-capacitor DAC. Its analog input multiplexer supports four single-ended or two pseudo-differential channels, with acquisition time dependent on source impedance and internal clock timing (two cycles in internal mode).

It operates exclusively in I²C Fast Mode (400kHz) or High-Speed Mode (1.7MHz), requiring master-initiated HS-mode entry via dedicated master code. The device uses a fixed slave address of 1100100 and supports channel-scan mode via internal FIFO, enabling automated multi-channel sampling without host intervention between conversions.

Key Specifications

Pinout & Package

MAX1036KEKA+T is housed in an 8-pin SOT23 package (3.0 mm × 1.7 mm × 1.3 mm), optimized for space-constrained portable designs. Pin functions are validated per Maxim's official datasheet (Rev 4, 5/09).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit, I²C ADC applications.

Compared with ADS7822U and MCP3221-AI/P, MAX1036KEKA+T offers optimal trade-off of I²C compatibility, 4.096V reference alignment with 5V systems, and ultra-low active current - making it uniquely suited for space- and power-constrained 5V portable instrumentation.

Availability

MAX1036KEKA+T is available at Aetrix Electronics and suitable for battery-powered test equipment, handheld portable applications, and medical instruments requiring stable component supply and long-term production continuity.

Supply support for MAX1036KEKA+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 demanding industrial, medical, and communications applications.

The MAX1036–MAX1039 family was engineered specifically for ultra-low-power, multi-channel data acquisition in portable and remote systems - emphasizing integration of reference, T/H, clock, and I²C interface in minimal footprint.

FAQ

What is the maximum sampling rate supported by the MAX1036KEKA+T?

The MAX1036KEKA+T achieves a maximum sampling rate of 188 ksps when operating in I²C High-Speed Mode (1.7 MHz clock) with external clocking. At this rate, supply current is 350 µA. Lower rates (e.g., 75 ksps at 110 µA) reduce power consumption proportionally, supporting adaptive throughput strategies in battery-sensitive designs. The internal clock limits maximum rate to 77 ksps.

Does the MAX1036KEKA+T require an external reference voltage?

No, the MAX1036KEKA+T includes a factory-trimmed 4.096 V internal reference, eliminating the need for external reference components in most 5 V system applications. An external reference (1 V to VDD) may be used for custom full-scale ranges, but doing so disables the internal reference and increases supply current slightly. The internal reference exhibits 120 ppm/°C temperature coefficient and remains stable across –40°C to +85°C.

How many analog input channels does the MAX1036KEKA+T support?

The MAX1036KEKA+T supports four analog input channels (AIN0–AIN3/REF) in single-ended mode, or two pseudo-differential pairs (e.g., AIN0–AIN1, AIN2–AIN3) when configured via the SGL/DIF bit. Channel selection is software-controlled through the CS[3:0] bits in the configuration register. The device also features an internal FIFO and channel-scan mode to automate sequential sampling across all enabled inputs without host intervention.

What package type is used for the MAX1036KEKA+T?

The MAX1036KEKA+T is supplied in an 8-pin SOT23 package (3.0 mm × 1.7 mm × 1.3 mm), with lead (Pb)-free/RoHS-compliant finish denoted by the '+' suffix. This compact surface-mount package supports reflow soldering and is optimized for high-density PCB layouts in portable electronics. Pinout matches industry-standard SOT23-8 footprints, enabling drop-in replacement evaluation with common prototyping carriers.

Can the MAX1036KEKA+T operate from a 3.3 V supply?

No, the MAX1036KEKA+T is specified only for 4.5 V to 5.5 V single-supply operation. It belongs to the MAX1036/MAX1038 variant group, which uses a 4.096 V internal reference and is electrically characterized over that voltage range. For 2.7–3.6 V operation with 2.048 V reference, the MAX1037KEKA+T (same package, same pinout) is the designated variant - not the MAX1036KEKA+T. Attempting 3.3 V operation risks noncompliance with DC accuracy and timing specifications.