Analog Devices Inc./Maxim Integrated MAX1107CUB+

Overview

MAX1107CUB+ from Maxim Integrated is an 8-bit successive-approximation analog-to-digital converter (ADC) with integrated track/hold, internal +4.096V reference, SPI/QSPI/MICROWIRE-compatible 3-wire serial interface, and pin-selectable unipolar single-ended or pseudo-differential operation. It operates from +4.5V to +5.5V, draws only 107µA at 25ksps, and targets precision measurement in space-constrained, low-power systems such as handheld medical instruments and solar-powered remote sensors.

For engineers reviewing the MAX1107CUB+ datasheet, MAX1107CUB+ pinout, MAX1107CUB+ application, or MAX1107CUB+ equivalent, this page delivers verified electrical specs, validated µMAX-10 package mapping, confirmed timing behavior (35µs max conversion time), real-world input configuration constraints (IN− stability ±0.5LSB), and two field-tested alternative ADCs for supply-voltage or reference-range trade-offs.

Technical Context

The MAX1107CUB+ employs a capacitive DAC-based SAR architecture with auto-zero rail and internal 400kHz oscillator, enabling fully self-timed conversions without external clock dependency. Its track/hold circuit acquires signals with ≤1µs minimum acquisition time and supports full-scale input ranges from GND to VDD when using external references between 1V and VDD.

Pin-configurable operation allows selection of internal reference (4.096V on REFOUT → REFIN) or external reference, unipolar single-ended (IN+ vs GND) or pseudo-differential (IN+ vs stable IN−) modes, and active-low shutdown (SHDN) that reduces current to 0.5µA while forcing DOUT into high-impedance state.

Key Specifications

Pinout & Package

MAX1107CUB+ is housed in a 10-pin µMAX package (3mm × 3mm, 0.5mm pitch), offering 20% footprint of an 8-pin plastic DIP and optimized for high-density portable PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1107CUB+, ADS7822U trades lower power for higher speed and no internal reference, while MAX1112CPE+ adds channel count and speed at the cost of package size and loss of pseudo-differential flexibility-making MAX1107CUB+ optimal for ultra-compact, single-channel, reference-integrated designs.

Availability

MAX1107CUB+ is available at Aetrix Electronics and suitable for portable data logging, hand-held measurement devices, and solar-powered remote systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MAX1107CUB+ 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 applications.

The MAX1106/MAX1107 product line was designed for ultra-low-power, space-constrained measurement systems requiring integrated reference, track/hold, and simple serial interfacing-targeting battery-operated instrumentation where minimizing external components is critical.

FAQ

What supply voltage range does the MAX1107CUB+ support?

The MAX1107CUB+ operates from +4.5V to +5.5V only. It is not rated for 3.3V or sub-4.5V operation-using voltages outside this range may cause permanent damage or invalid conversion results. This distinguishes it from the MAX1106CUB+, which supports +2.7V to +3.6V.

Does the MAX1107CUB+ require an external reference voltage?

No-the MAX1107CUB+ includes an internal +4.096V reference accessible at the REFOUT pin. To use it, connect REFOUT to REFIN and bypass REFOUT with a 1µF capacitor to GND. External references from 1V to VDD are also supported when higher precision or different scaling is needed.

How does the pseudo-differential input mode work on the MAX1107CUB+?

In pseudo-differential mode, the MAX1107CUB+ samples only IN+ while treating IN− as a stable reference point. IN− must remain within ±0.5LSB of GND during conversion; applying a varying signal to IN− introduces error. For best accuracy, tie IN− to GND or a clean reference, and use a 0.1µF capacitor from IN− to GND.

What is the maximum achievable sampling rate for the MAX1107CUB+?

The MAX1107CUB+ guarantees ≤35µs conversion time, supporting up to 25ksps (25,000 samples per second). Higher rates are possible only if actual measured conversion time under specific conditions (e.g., supply voltage, reference type) is shorter-but 25ksps is the datasheet-specified maximum for guaranteed performance across temperature and voltage.

Can the MAX1107CUB+ interface directly with a 3.3V microcontroller SPI port?

Yes-the MAX1107CUB+ digital inputs (SCLK, CONVST, SHDN) accept logic levels compatible with both 3.3V and 5V systems regardless of VDD. Its DOUT output swings from GND to VDD, so a 3.3V MCU reading DOUT requires either a level shifter or assurance that the MCU's input threshold tolerates VDD = 5.5V swing (check MCU datasheet for absolute max input voltage).