Microchip Technology MCP33111-10T-E/MS

Overview

MCP33111-10T-E/MS from Microchip Technology is a 12-bit, 1 Msps successive approximation register (SAR) analog-to-digital converter with single-ended input, no missing codes, and no output latency. It operates from a 1.8V analog supply (AVDD), supports 1.7V–5.5V digital I/O (DVIO), and accepts 2.5V–5.1V external reference (VREF). Designed for high-precision, low-power data acquisition in automotive battery management and motor control systems.

For engineers reviewing the MCP33111-10T-E/MS datasheet, MCP33111-10T-E/MS pinout, MCP33111-10T-E/MS application, or MCP33111-10T-E/MS equivalent, this page delivers verified electrical specs, package mapping to MSOP-10, SPI timing constraints up to 100 MHz, self-calibration behavior, and AEC-Q100 Grade 1 qualification for -40°C to +125°C operation.

Technical Context

The MCP33111-10T-E/MS implements a SAR architecture with internal clock generation-decoupling conversion timing from SCLK-and uses CNVST as both conversion trigger and chip select. Its pseudo-differential input stage supports true single-ended operation with full-scale range of 0V to VREF, enabling direct interfacing with sensors and signal-conditioning circuits without external level-shifting.

Self-calibration corrects offset, gain, and linearity errors at power-up and on-demand via SPI command. The device enters ultra-low-current standby (<0.8 µA typical) between conversions, with acquisition time of 250–300 ns and total conversion cycle of 1 µs at 1 Msps, ensuring deterministic timing for real-time control loops.

Key Specifications

Pinout & Package

Package: MSOP-10 (3.0 mm × 4.9 mm, 0.5 mm pitch), Pb-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7042IRUGR and AD7476ARTZ-REEL7, the MCP33111-10T-E/MS uniquely combines AEC-Q100 Grade 1 qualification, 1.7–5.5V DVIO flexibility, and user-commanded self-calibration-enabling drop-in deployment in automotive BMS and industrial motor drives without layout or firmware redesign.

Availability

MCP33111-10T-E/MS is available at Aetrix Electronics and suitable for electric vehicle battery management systems, industrial motor control units, and medical patient monitors requiring stable component supply across long production lifecycles.

Supply support for MCP33111-10T-E/MS 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 microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets.

The MCP331xx family targets high-speed, low-power, automotive-qualified data acquisition-designed specifically for real-time sensor digitization in safety-critical and thermally demanding environments.

FAQ

What is the maximum SPI clock frequency supported by the MCP33111-10T-E/MS?

The MCP33111-10T-E/MS supports an SCLK frequency up to 100 MHz when DVIO ≥ 3.3V. At lower DVIO voltages (e.g., 1.7V), the maximum SCLK drops to 62.5 MHz. Timing parameters-including tSCLK_L, tSCLK_H, and tDO-are voltage-dependent and specified in Table 1-2 of the DS20006122A datasheet. The MCP33111-10T-E/MS does not require SCLK during conversion, as it uses an internal clock generator.

Does the MCP33111-10T-E/MS support pseudo-differential input mode?

No-the MCP33111-10T-E/MS is configured exclusively for single-ended input operation per its datasheet specification. While the pinout includes AIN+ and AIN−, AIN− must be tied to GND for proper function. Pseudo-differential capability is not implemented in the MCP33111-10T-E/MS silicon; that feature applies only to higher-resolution variants like the MCP33131-10. The MCP33111-10T-E/MS full-scale range is strictly 0V to VREF on AIN+.

How does the self-calibration process affect system timing in the MCP33111-10T-E/MS?

Self-calibration in the MCP33111-10T-E/MS takes 500–650 ms and halts normal conversion operation. During this time, the device ignores CNVST edges and does not output valid data. Calibration is triggered automatically at power-up or manually via SPI command. Because calibration consumes significant time, it is intended for initialization or infrequent re-trimming-not continuous background operation. The MCP33111-10T-E/MS remains fully functional before and after calibration without reset.

Is the MCP33111-10T-E/MS pin-compatible with other devices in the MCP331xx family?

Yes-the MCP33111-10T-E/MS shares identical MSOP-10 and TDFN-10 pinouts with all MCP331x1-XX variants (e.g., MCP33121-10, MCP33131-10). Pin functions (AIN+, AVDD, CNVST, etc.) and physical layout are consistent across resolution and speed grades. This allows hardware reuse across 12-/14-/16-bit versions, though firmware must accommodate differing output word lengths (12 vs. 14 vs. 16 bits) and performance characteristics.

What decoupling capacitors are required for stable operation of the MCP33111-10T-E/MS?

Per Microchip's DS20006122A recommendations: a 1 µF ceramic capacitor on AVDD, a 0.1 µF ceramic capacitor on DVIO, and a 10 µF tantalum capacitor on VREF. These values address different noise spectra-AVDD and DVIO caps suppress high-frequency digital switching noise, while the larger VREF capacitor stabilizes the reference against step-load transients during conversion. All capacitors must be placed as close as possible to their respective pins.