Analog Devices Inc./Maxim Integrated MAX11101EUB+

Overview

MAX11101EUB+ from Maxim Integrated is a 14-bit, single-supply +5V successive-approximation analog-to-digital converter (ADC) with SPI/QSPI/MICROWIRE-compatible serial interface, 200ksps maximum sampling rate, 4MHz input bandwidth, and 0.1µA shutdown current. It features internal track-and-hold, unipolar 0–V_REF input range, and separate analog/digital supplies for flexible logic interfacing in space-constrained industrial data-acquisition systems.

For engineers reviewing the MAX11101EUB+ datasheet, MAX11101EUB+ pinout, MAX11101EUB+ application, or MAX11101EUB+ equivalent, this page delivers verified electrical specs, package mapping to 10-pin µMAX, functional pin roles, real-world use cases in thermocouple and accelerometer measurement, and two validated alternative ADCs with documented technical and application differences.

Technical Context

The MAX11101EUB+ implements a 14-bit SAR architecture with integrated track-and-hold, supporting unipolar conversions over 0–V_REF (up to 5.25V). Its serial interface operates at up to 4.8MHz with CPOL=0/CPHA=0 timing, requiring 24 clock cycles per conversion (eight leading zeros + 14 data bits + two sub-bits).

Power management is controlled via CS: pulling CS high enters shutdown (0.1µA typical), while CS low initiates acquisition on the falling edge and enables DOUT output. Acquisition time is fixed at 1.1µs, independent of source impedance below 1kΩ, and full-scale bandwidth is specified at 4MHz small-signal.

Key Specifications

Pinout & Package

The MAX11101EUB+ is packaged in a 10-pin µMAX (FMAXM) package, 3mm × 3mm, exposed pad, RoHS-compliant. Pin numbering follows standard top-view orientation with pin 1 marked.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 14-bit SAR ADC applications.

Compared with ADS8860IDRCT and AD7940BRMZ, the MAX11101EUB+ uniquely balances 200ksps speed, 0.1µA shutdown, 5V-tolerant digital interface, and 14-bit linearity - making it the only option among the three that meets all requirements for high-throughput, low-power, mixed-voltage industrial data acquisition.

Availability

MAX11101EUB+ is available at Aetrix Electronics and suitable for industrial process control, thermocouple measurement, and portable equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX11101EUB+ 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, automotive, and communications markets.

The MAX11101 belongs to Maxim's precision data-acquisition ADC family, designed specifically for low-power, high-accuracy sensor interfacing in space- and energy-constrained industrial and portable systems.

FAQ

What is the maximum sampling rate of the MAX11101EUB+ and what clock frequency is required?

The MAX11101EUB+ supports a maximum sampling rate of 200ksps, achieved with a 4.8MHz serial clock (SCLK). Each conversion requires exactly 24 SCLK cycles - eight leading zeros, 14 data bits, and two sub-bits - resulting in a fixed t_CONV of 5µs minimum. Lower SCLK frequencies proportionally reduce sample rate, with accuracy degrading below 100kHz due to leakage effects.

Does the MAX11101EUB+ require an external reference, and what are the voltage and current requirements?

Yes, the MAX11101EUB+ requires an external reference applied to the REF pin, with a valid range of 3.8V to V_AVDD (max 5.25V). During conversion, REF must supply up to 150µA DC current with output impedance ≤10Ω. A 4.7µF bulk capacitor plus 0.1µF ceramic capacitor is mandatory for noise suppression; insufficient bypassing directly degrades gain accuracy and SINAD performance.

How does the shutdown mode work on the MAX11101EUB+, and what is the typical current draw?

Shutdown mode on the MAX11101EUB+ is activated by driving the CS pin high, which disables the internal SAR core, track-and-hold, and digital interface, placing DOUT in high-impedance state. Typical shutdown supply current is 0.1µA (100nA) at +25°C, rising to <10µA over full temperature range (–40°C to +85°C). Recovery time from shutdown to first valid conversion is 1.1µs (fast wake-up).

What package type is used for the MAX11101EUB+, and is it pin-compatible with other variants in the family?

The MAX11101EUB+ uses the 10-pin µMAX (FMAXM) package, 3mm × 3mm body with exposed pad. It is not pin-compatible with the 12-bump WLP variant (MAX11101ETP+) - pin assignments differ, particularly for AGND and REF. The µMAX version has dual AGND pins (pins 4 and 8) and dedicated REF (pin 6), whereas the WLP uses a different bump layout optimized for board area reduction.

Can the MAX11101EUB+ interface directly with a 3.3V microcontroller without level shifters?

Yes, the MAX11101EUB+ supports direct 3.3V MCU interfacing: its DVDD rail accepts 2.7–5.25V, and digital inputs (CS, SCLK) have VIH = 0.7×VDVDD and VIL = 0.3×VDVDD, ensuring reliable recognition of 3.3V logic levels. DOUT output VOH/VOL specs guarantee compatibility with 3.3V inputs, eliminating need for external level-shifting circuitry in mixed-voltage systems.