Microchip Technology MCP33121D-10T-I/MS

Overview

MCP33121D-10T-I/MS from Microchip Technology is a 14-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 from 1.8V AVDD and supports 1.7V–5.5V DVIO, enabling direct interfacing with PIC32 and other host MCUs without level shifters - ideal for high-precision battery management and motor control systems.

For engineers reviewing the MCP33121D-10T-I/MS datasheet, MCP33121D-10T-I/MS pinout, MCP33121D-10T-I/MS application, or MCP33121D-10T-I/MS equivalent, this page delivers verified specifications including differential ±5.1V input range, SPI-compatible 3-wire interface (up to 100 MHz SCLK), self-calibration for offset/gain/linearity, and MSOP-10/TDFN-10 package options.

Technical Context

The MCP33121D-10T-I/MS uses an internal SAR clock independent of the SPI serial clock, ensuring deterministic conversion timing (700–750 ns) and no output latency. Its differential input architecture supports full-scale ranges from –VREF to +VREF with 84 dB CMRR and 70 dB PSRR, maintaining accuracy across automotive temperature extremes.

Self-calibration occurs automatically at power-up and can be triggered on-demand via SPI command (1024 SCLK cycles), correcting offset, gain, and linearity errors. Input acquisition time is 250–300 ns at –40°C to +85°C and 290–300 ns at +85°C to +125°C, enabling precise sampling in fast-switching power systems.

Key Specifications

Pinout & Package

Package: MSOP-10 (3 mm × 3 mm, 0.5 mm pitch) and TDFN-10 (3 mm × 3 mm, 0.5 mm pitch); both RoHS-compliant, Pb-free, and qualified to AEC-Q100 Grade 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed differential ADC applications.

Compared with ADS8860IDRCT, MCP33121D-10T-I/MS offers integrated self-calibration and AEC-Q100 qualification at lower active power, while MCP33121D-05T-I/MS provides identical functionality at reduced speed and current - enabling scalable design reuse across product tiers.

Availability

MCP33121D-10T-I/MS is available at Aetrix Electronics and suitable for electric vehicle battery management, industrial motor control, and medical patient monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MCP33121D-10T-I/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 microcontrollers, analog, and Flash-IP solutions, serving automotive, industrial, and communications markets with high-reliability silicon and development tools.

The MCP331x1D family was designed specifically for high-precision, low-power, automotive-grade data acquisition - emphasizing differential input robustness, on-chip calibration, and extended temperature operation without external support circuitry.

FAQ

What is the maximum SPI clock frequency supported by the MCP33121D-10T-I/MS?

The MCP33121D-10T-I/MS supports an SPI SCLK frequency up to 100 MHz, with timing validated for 60 MHz operation at its full 1 Msps sample rate. Minimum SCLK period is 10 ns for DVIO ≥ 3.3V, and setup/hold times are guaranteed across the full 1.7V–5.5V DVIO range per Table 1-2 of DS20005947B.

Does the MCP33121D-10T-I/MS require an external reference voltage?

Yes, the MCP33121D-10T-I/MS requires an external reference voltage applied to the VREF pin, with a specified range of 2.5V to 5.1V. The device does not include an internal reference; VREF directly sets the differential full-scale range (±VREF), and reference load current is 450 µA typical during conversion.

How does the self-calibration function work on the MCP33121D-10T-I/MS?

The MCP33121D-10T-I/MS performs automatic self-calibration at power-up to correct offset, gain, and linearity errors. A recalibration command can be issued anytime via SPI (requiring 1024 SCLK cycles), which is especially useful after large reference voltage changes or thermal transients - restoring typical INL to ±0.5 LSB and DNL to ±0.25 LSB.

What package options are available for the MCP33121D-10T-I/MS?

The MCP33121D-10T-I/MS is offered in two RoHS-compliant, Pb-free packages: MSOP-10 (3 mm × 3 mm, 0.5 mm pitch) and TDFN-10 (3 mm × 3 mm, 0.5 mm pitch). Both packages share identical pinout and are AEC-Q100 Grade 1 qualified for operation from –40°C to +125°C.

Is the MCP33121D-10T-I/MS compatible with 1.8V microcontrollers?

Yes, the MCP33121D-10T-I/MS supports DVIO from 1.7V to 5.5V, making it fully compatible with 1.8V microcontrollers such as PIC32MZ EF. Its VIH threshold is 0.7 × DVIO (min), and VIL is 0.3 × DVIO (max), ensuring reliable logic-level interfacing without external level shifters.