Microchip Technology MCP33111D-10-E/MN

Overview

MCP33111D-10-E/MN from Microchip Technology is a 12-bit, 1 Msps fully differential successive approximation register (SAR) analog-to-digital converter with no missing codes, ultra-low standby current (0.8 µA), and AEC-Q100 Grade 1 qualification (-40°C to +125°C). It operates with 1.8V analog supply (AVDD), 1.7–5.5V digital I/O interface (DVIO), and 2.5–5.1V external reference (VREF), targeting high-precision battery-powered data acquisition in automotive and industrial systems.

For engineers reviewing the MCP33111D-10-E/MN datasheet, MCP33111D-10-E/MN pinout, MCP33111D-10-E/MN application, or MCP33111D-10-E/MN equivalent, this page delivers verified technical context, SPI timing constraints, differential input full-scale range (±5.1V), self-calibration capability, and validated alternatives for automotive-grade 12-bit ADC selection.

Technical Context

The MCP33111D-10-E/MN uses an internal SAR clock independent of SPI SCLK, enabling deterministic conversion time (750 ns max) and no output latency. Its differential input architecture supports ±VREF full-scale range with 84 dB CMRR and 70 dB PSRR, while on-demand self-calibration corrects offset, gain, and linearity errors without host intervention.

It features a 3-wire SPI-compatible interface with CNVST as chip select, supporting up to 100 MHz SCLK and delivering 12-bit output with MSB-first format. Input acquisition time is 300 ns max at 125°C, and the device enters low-power Standby mode (<1 µA) between conversions, with sampling capacitors connected to AIN+ and AIN− during acquisition.

Key Specifications

Pinout & Package

Package: 10-pin TDFN (3 mm × 3 mm) and MSOP-10 - both RoHS-compliant, thermally optimized (θJA = 68°C/W for TDFN), and qualified for automotive under AEC-Q100.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit SAR ADC applications.

Compared with ADS7142IRUGT and AD7476ARTZ-REEL7, the MCP33111D-10-E/MN uniquely combines true differential input, on-chip self-calibration, AEC-Q100 Grade 1 qualification, and 1.8V AVDD operation-making it the only option among the three suitable for next-generation automotive battery management and motor control systems requiring zero-latency, high-reliability 12-bit conversion.

Availability

MCP33111D-10-E/MN is available at Aetrix Electronics and suitable for electric vehicle battery management systems, automotive motor control units, industrial PLC analog input modules, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MCP33111D-10-E/MN 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

Microchip Technology Inc. is a leading provider of microcontrollers, analog devices, and Flash-IP solutions, serving automotive, industrial, and communications markets with high-reliability silicon and design support.

The MCP331xxD family was designed specifically for high-speed, high-accuracy, low-power differential data acquisition in automotive and industrial environments-emphasizing AEC-Q100 compliance, self-calibration, and flexible digital interface voltage scaling.

FAQ

What is the maximum SPI clock frequency supported by the MCP33111D-10-E/MN?

The MCP33111D-10-E/MN supports up to 100 MHz SCLK frequency when DVIO ≥ 3.3V. At lower DVIO voltages, the maximum SCLK is reduced: 83.3 MHz for DVIO ≥ 2.3V and 62.5 MHz for DVIO ≥ 1.7V. These limits ensure reliable setup/hold timing for SDI and SDO, as specified in Table 1-2 of the DS20005947B datasheet. The MCP33111D-10-E/MN does not require SCLK to drive conversion timing-the internal SAR clock handles that independently.

Does the MCP33111D-10-E/MN require external calibration components?

No, the MCP33111D-10-E/MN performs automatic self-calibration at power-up and supports on-demand recalibration via SPI command-eliminating need for external trim components or factory calibration fixtures. This calibration corrects offset, gain, and linearity errors across temperature and supply variations. The MCP33111D-10-E/MN achieves ±0.12 LSB INL and ±0.06 LSB DNL without external adjustments, as verified in characterization data.

Can the MCP33111D-10-E/MN operate with a 2.5V reference voltage?

Yes, the MCP33111D-10-E/MN supports VREF from 2.5V to 5.1V. At 2.5V reference, the differential full-scale range is ±2.5V, and dynamic performance remains robust: SNR = 73.8 dBFS and SFDR = 97.7 dBc at fIN = 10 kHz. The device maintains specification compliance across this range, with guaranteed operation down to -40°C and up to +125°C. The MCP33111D-10-E/MN's reference input is buffered and load-current optimized for stability with 10 µF tantalum decoupling.

What package options are available for the MCP33111D-10-E/MN?

The MCP33111D-10-E/MN is offered in two RoHS-compliant packages: 10-pin TDFN (3 mm × 3 mm, θJA = 68°C/W) and 10-pin MSOP (θJA = 202°C/W). Both packages support the full -40°C to +125°C operating range and are AEC-Q100 qualified. The "E/MN" suffix explicitly denotes the TDFN-10 variant per Microchip's part numbering convention, confirmed in the device ordering information section of DS20005947B.

How does the CNVST pin function in the MCP33111D-10-E/MN interface?

In the MCP33111D-10-E/MN, CNVST serves dual roles: (1) rising edge triggers analog input sampling and starts conversion, and (2) acts as chip select-SDO output is enabled only when CNVST is low. Minimum CNVST pulse width is 10 ns. After conversion completes (~750 ns), lowering CNVST makes the 12-bit result available on SDO for SPI readout. This integrated control simplifies timing versus separate CS/CONV pins. The MCP33111D-10-E/MN's CNVST-driven interface reduces host GPIO count and eliminates external synchronization logic.