Analog Devices Inc./Maxim Integrated MAX11101EWC+T

Overview

MAX11101EWC+T from Maxim Integrated is a 14-bit successive-approximation analog-to-digital converter (ADC) operating from a single +5V analog supply with independent 2.7V–5.25V digital logic interface. It delivers 200ksps sampling rate, 84dB SINAD at 1kHz, ±0.5LSB DNL, and 0.1µA shutdown current - enabling high-precision data acquisition in space-constrained, battery-powered systems such as portable instrumentation and industrial I/O modules.

For engineers reviewing the MAX11101EWC+T datasheet, MAX11101EWC+T pinout, MAX11101EWC+T application, or MAX11101EWC+T equivalent, key selection criteria include unipolar 0–VREF input range, SPI/QSPI/MICROWIRE serial interface timing compliance, 4MHz input bandwidth with internal track-and-hold, and dual-supply flexibility for mixed-voltage system integration.

Technical Context

The MAX11101EWC+T implements a 14-bit SAR architecture with integrated track-and-hold, supporting full-scale input ranges defined by an external reference (3.8V to VAVDD). Its conversion sequence is initiated by CS falling edge and driven by SCLK up to 4.8MHz, requiring 24 clock cycles per sample with MSB-first unipolar output format including eight leading zeros and two sub-bits (S1/S0).

Power management is controlled via CS: high state enables AutoShutdown™, reducing total supply current to ≤0.1µA; low state activates full operation with typical 2.45mA consumption at 200ksps. The device features separate AVDD/AGND and DVDD/DGND domains, with DGND–AGND offset limited to ±0.3V to maintain DC accuracy.

Key Specifications

Pinout & Package

The MAX11101EWC+T is packaged in a 10-pin µMAX (FMAXM) package with exposed pad, measuring 3mm × 3mm × 0.8mm. Pin assignments are validated per Maxim's official pin configuration diagram (Rev 1, p.8) and match the WLP bump layout for functional equivalence.

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 MAX11101EWC+T uniquely balances 200ksps throughput, true 14-bit linearity, and 0.1µA shutdown in a 10-pin µMAX package - making it optimal for portable industrial instruments needing both speed and battery longevity.

Availability

MAX11101EWC+T is available at Aetrix Electronics and suitable for motor control feedback systems, industrial I/O modules, thermocouple measurement devices, and portable test equipment requiring stable component supply and long-term production continuity.

Supply support for MAX11101EWC+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.

The MAX11101EWC+T belongs to Maxim's precision data-acquisition ADC product line, designed specifically for battery-powered and space-constrained applications demanding high resolution, low power, and robust serial interfacing.

FAQ

What is the maximum sampling rate supported by the MAX11101EWC+T?

The MAX11101EWC+T supports a maximum sampling rate of 200ksps, achieved with a 4.8MHz SCLK and 24-clock conversion cycle. At this rate, typical supply current is 2.45mA (IAVDD + IDVDD), and dynamic performance includes 84dB SINAD and 87dB SFDR at 1kHz input. Sampling below 200ksps reduces power consumption proportionally via AutoShutdown™.

Does the MAX11101EWC+T require an external reference voltage?

Yes, the MAX11101EWC+T requires an external reference voltage applied to the REF pin, with a valid range of 3.8V to VAVDD (up to 5.25V). The device does not include an internal reference. A 4.7µF bulk capacitor plus 0.1µF ceramic capacitor must bypass REF to AGND to maintain 14-bit accuracy; noise on REF directly impacts LSB-level precision.

How does the MAX11101EWC+T enter and exit shutdown mode?

The MAX11101EWC+T enters shutdown mode when the CS pin is driven high, reducing total supply current to ≤0.1µA. It exits shutdown and initiates conversion on the falling edge of CS. No additional reset sequence is needed - pulling CS low automatically activates the internal track-and-hold and begins acquisition, with data available at DOUT after 24 SCLK cycles.

What digital interface standards is the MAX11101EWC+T compatible with?

The MAX11101EWC+T is fully compatible with SPI, QSPI, and MICROWIRE serial interfaces using CPOL = 0 and CPHA = 0 configuration. It accepts SCLK frequencies from 100kHz to 4.8MHz and outputs 24-bit frames (eight leading zeros + 14 data bits + two sub-bits) MSB-first on DOUT, with data valid on SCLK's falling edge.

Can the MAX11101EWC+T operate with different analog and digital supply voltages?

Yes, the MAX11101EWC+T supports independent analog and digital supplies: AVDD must be 4.75V–5.25V, while DVDD operates from 2.7V–5.25V. This allows direct interfacing with 3.3V microcontrollers without level shifters. However, DGND–AGND voltage difference must remain within ±0.3V to prevent accuracy degradation or latch-up.