Analog Devices Inc./Maxim Integrated MAX1106CUB+T

Overview

MAX1106CUB+T from Maxim Integrated is a single-supply, low-power, 8-bit serial analog-to-digital converter (ADC) with integrated track/hold, internal +2.048V reference, SPI/QSPI/MICROWIRE-compatible 3-wire interface, and 25ksps conversion rate. It operates from +2.7V to +3.6V, draws only 96µA during conversion, and supports pin-configurable unipolar single-ended or pseudo-differential input modes. It is used in portable data loggers and hand-held measurement devices where battery life and compact size are critical.

For engineers reviewing the MAX1106CUB+T datasheet, MAX1106CUB+T pinout, MAX1106CUB+T application, or MAX1106CUB+T equivalent, key selection factors include its 10-pin µMAX package footprint (20% of an 8-pin DIP), 0.5µA shutdown current, ±0.15 LSB INL over temperature, 49dB SINAD at 10kHz, and support for external reference voltages from 1V to VDD.

Technical Context

The MAX1106CUB+T uses a successive-approximation register (SAR) architecture with an integrated track/hold circuit and internal 400kHz oscillator, enabling autonomous 25ksps conversions without external clocking. Its analog front-end accepts inputs from GND to VDD on IN+ and IN−, with pseudo-differential operation requiring IN− stability within ±0.5LSB relative to GND during conversion.

Digital control is implemented via three dedicated pins: CONVST initiates conversion on falling edge after ≥1µs high pulse; SCLK clocks out 8-bit straight-binary data on falling edges up to 2MHz; SHDN enables 0.5µA power-down mode. The 3-wire interface requires no level-shifting logic for direct connection to SPI/QSPI/MICROWIRE controllers with CPOL=CPHA=0.

Key Specifications

Pinout & Package

The MAX1106CUB+T is housed in a 10-pin µMAX package (3mm × 3mm, 0.5mm pitch), thermally enhanced with exposed pad, footprint compatible across MAX1106/MAX1107 family variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and TLV2541IDR, the MAX1106CUB+T uniquely balances ultra-low 96µA active current, integrated +2.048V reference, and 10-pin µMAX footprint-making it optimal for portable, battery-sensitive systems where conversion rate ≤25ksps is sufficient and board area is at premium.

Availability

MAX1106CUB+T is available at Aetrix Electronics and suitable for portable data logging, hand-held measurement devices, and medical instruments requiring stable component supply with guaranteed long-term manufacturability.

Supply support for MAX1106CUB+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 industrial, medical, and communications applications.

The MAX1106CUB+T belongs to Maxim's low-power serial ADC product line, engineered specifically for battery-operated instrumentation where minimal supply current, small footprint, and integrated signal conditioning are mandatory design constraints.

FAQ

What is the maximum sampling rate supported by the MAX1106CUB+T?

The MAX1106CUB+T supports a maximum conversion rate of 25ksps, guaranteed by its internal 400kHz oscillator and 35µs maximum conversion time. This rate is achievable across the full operating temperature range (0°C to +70°C) and supply voltage range (+2.7V to +3.6V). Attempting higher rates may result in incomplete conversions or invalid output codes, as timing margins for track/hold acquisition and SAR settling are not specified beyond 25ksps.

Can the MAX1106CUB+T operate with an external reference voltage?

Yes, the MAX1106CUB+T accepts an external reference voltage applied directly to the REFIN pin, with a valid range of 1V to VDD. When using an external reference, the internal +2.048V reference at REFOUT is disabled. This configuration improves absolute accuracy in systems where a higher-precision or temperature-stable reference (e.g., REF5025) is available, and eliminates REFOUT settling delay during wake-up from shutdown.

How does the pseudo-differential input mode work on the MAX1106CUB+T?

In pseudo-differential mode, the MAX1106CUB+T samples only the IN+ input while holding IN− as a stable reference point. The device requires IN− to remain within ±0.5LSB of GND during conversion; exceeding this causes differential nonlinearity errors. For best results, tie IN− to GND or a clean DC bias, and bypass with 0.1µF. Unlike true differential ADCs, it does not reject common-mode noise on both inputs simultaneously.

What is the wake-up time from shutdown for the MAX1106CUB+T?

The wake-up time for the MAX1106CUB+T depends on reference source: with external reference, wake-up is immediate after SHDN returns high and CONVST is toggled; with internal reference, wake-up takes 200µs to settle within 1LSB if partially discharged, or up to 12ms if REFOUT is fully discharged. Designers should allow full 12ms recovery after deep shutdown unless external reference is used.

Is the MAX1106CUB+T pin-compatible with other devices in the MAX1106/MAX1107 family?

Yes, all MAX1106 and MAX1107 variants-including MAX1106CUB+T, MAX1106EUB+, MAX1107CUB+, and MAX1107EUB+-share identical 10-pin µMAX pinouts and electrical interfaces. The only differences are supply voltage range (+2.7V to +3.6V for MAX1106, +4.5V to +5.5V for MAX1107) and internal reference voltage (+2.048V vs. +4.096V), allowing drop-in replacement within same voltage domain.