Microchip Technology MCP3462T-E/NC

Overview

MCP3462T-E/NC from Microchip Technology is a dual-channel, 16-bit delta-sigma analog-to-digital converter (ADC) with programmable gain (0.33x–64x), up to 153.6 ksps data rate, and integrated temperature sensor. It supports differential or single-ended inputs, features 97.2 dB SINAD at 4800 SPS (gain = 1x), and operates across –40°C to +125°C for industrial sensor transmitters and factory automation systems.

For engineers reviewing the MCP3462T-E/NC datasheet, MCP3462T-E/NC pinout, MCP3462T-E/NC application, or MCP3462T-E/NC equivalent, key selection criteria include its 20-lead UQFN (3 mm × 3 mm) or TSSOP package, ultra-low full shutdown current (< 0.83 µA), 16-bit digital offset/gain calibration registers, and secure SPI interface with 16-bit CRC.

Technical Context

The MCP3462T-E/NC implements a second-order delta-sigma modulator with analog gain stage followed by a SINC3 digital filter and optional SINC1 path. Its internal sequencer (SCAN mode) enables autonomous multiplexed conversions across two input channels without MCU intervention, using a configurable 24-bit timer and per-channel delay registers.

It supports both internal RC oscillator (3.3–6.6 MHz) and external clock (1–20 MHz), with dual supply domains (AVDD: 2.7–3.6 V; DVDD: 1.8–3.6 V). Security includes register map lock via 8-bit secure key, IRQ-triggered configuration CRC, and SPI command-level 16-bit CRC for data integrity.

Key Specifications

Pinout & Package

Package: 20-lead UQFN (3 mm × 3 mm) with exposed thermal pad (EP), or 20-lead TSSOP (6.5 mm × 4.4 mm × 1 mm). Both packages support extended temperature operation and are RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit delta-sigma ADC applications.

Compared with ADS1262IPW and MCP3464T-E/NC, the MCP3462T-E/NC uniquely balances dual-channel flexibility, embedded security (CRC + register lock), autonomous SCAN-mode operation, and ultra-low power shutdown-making it optimal for cost-sensitive, safety-aware industrial edge nodes.

Availability

MCP3462T-E/NC is available at Aetrix Electronics and suitable for precision sensor transducers, factory automation I/O modules, and portable instrumentation requiring stable component supply across automotive, industrial, and medical OEM programs.

Supply support for MCP3462T-E/NC 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 industrial, automotive, and consumer markets with high-reliability silicon and development tools.

The MCP346x family targets high-accuracy, low-power sensor signal conditioning in space- and energy-constrained applications-emphasizing integrated diagnostics, security, and autonomous operation to reduce system-level BOM and firmware complexity.

FAQ

What is the maximum data rate supported by the MCP3462T-E/NC?

The MCP3462T-E/NC supports a maximum output data rate of 153.6 ksps. This is achieved at the lowest oversampling ratio (OSR = 32) and highest modulator clock (AMCLK) setting. At higher OSR values, the data rate decreases proportionally-for example, at OSR = 1024, the rate drops to ~4.8 ksps. The device maintains 16-bit resolution and 97.2 dB SINAD across its full data rate range, making it suitable for both high-speed transient capture and high-precision static measurements. All rates are fully programmable via register configuration.

Does the MCP3462T-E/NC support both differential and single-ended input configurations?

Yes, the MCP3462T-E/NC supports two differential input channels (CH0/CH1) or four single-ended channels (CH0, CH1, CH2, CH3) depending on configuration. In differential mode, each channel measures the voltage difference between paired pins (e.g., CH0+ and CH0–); in single-ended mode, inputs are referenced to AGND. The analog multiplexer and internal routing allow software-selectable configurations without external rework. Input impedance varies with gain setting-from 510 kΩ at 0.33x to 20 kΩ at ≥16x-ensuring compatibility with common sensor output impedances.

How does the internal temperature sensor in the MCP3462T-E/NC function, and what is its accuracy?

The MCP3462T-E/NC integrates a calibrated on-die temperature sensor with ±5°C accuracy over the full –40°C to +125°C operating range. It operates independently of ADC conversions and can be read via dedicated register access. The sensor output is digitized internally and reported as a 16-bit value corresponding to die temperature, eliminating the need for external thermistors or ICs. Its primary design value is system-level thermal monitoring-not for ambient sensing-and supports functions like thermal derating, fan control, or fault logging. No external components or calibration are required for basic use.

What security features does the MCP3462T-E/NC provide for SPI communications?

The MCP3462T-E/NC provides three layered security features for SPI: (1) 16-bit CRC protection on all SPI command and data transfers, (2) separate 16-bit CRC validation for configuration register writes triggered by the IRQ pin, and (3) register map lock enabled by an 8-bit secure key that prevents unauthorized modification of critical settings. These features collectively prevent command injection, configuration corruption, and accidental register overwrite in electrically noisy or security-sensitive environments such as industrial control networks or medical devices. CRC is computed in hardware and verified before register updates execute.

Can the MCP3462T-E/NC operate with different supply voltages for analog and digital domains?

Yes, the MCP3462T-E/NC supports independent analog (AVDD) and digital (DVDD) supplies: AVDD ranges from 2.7 V to 3.6 V, while DVDD operates from 1.8 V to 3.6 V (but not exceeding AVDD + 0.1 V). This dual-supply architecture isolates noise-sensitive analog circuitry from digital switching transients and enables direct interfacing with low-voltage MCUs (e.g., 1.8 V or 3.3 V cores) without level shifters. Power-on reset thresholds differ per domain (1.75 V for analog, 1.2 V for digital), ensuring robust startup sequencing. Current consumption scales with supply levels-e.g., analog operating current is 0.56 mA typical at BOOST = 00 and AVDD = 3.3 V.