Microchip Technology MCP3464RT-E/NC

Overview

MCP3464RT-E/NC from Microchip Technology is a quad-channel, 16-bit delta-sigma ADC with programmable gain (0.33x–64x), 153.6 ksps max data rate, and integrated 2.4V internal voltage reference (15 ppm/°C drift). It features differential input multiplexing, burnout current sources for sensor fault detection, and operates across –40°C to +125°C in industrial and automotive sensor front-ends.

For engineers reviewing the MCP3464RT-E/NC datasheet, MCP3464RT-E/NC pinout, MCP3464RT-E/NC application, or MCP3464RT-E/NC equivalent, key selection criteria include channel count, RMS effective resolution (≥15.4 bits), SPI interface timing compliance (20 MHz, Mode 0,0/1,1), low-noise performance (2.3 µVRMS at 9600 SPS, Gain=16x), and extended temperature operation.

Technical Context

The MCP3464RT-E/NC implements a second-order delta-sigma modulator with SINC3 digital filtering, oversampling ratio (OSR) configurable from 32 to 98304, and supports both internal RC oscillator (3.3–6.6 MHz) and external clock (1–20 MHz). Its analog front-end includes programmable gain amplifier (PGA), chopper-stabilized offset calibration (AZ_MUX), and dedicated monitor channels for autonomous scan-mode sequencing.

It integrates security features including 16-bit CRC on SPI commands and configuration registers, register map lock via 8-bit secure key, and IRQ-driven event notification for system synchronization. The device uses separate AGND/DGND domains and supports differential or single-ended inputs with full-scale range = 2 × VREF/Gain.

Key Specifications

Pinout & Package

Package: 20-lead UQFN (3 mm × 3 mm × 0.55 mm) with exposed thermal pad (EP). Pin 1 marked by dot; NC pins (1, 17–20) must be tied to AGND per datasheet recommendation for EMI immunity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS1263IPBS and AD7768-4BCPZ, the MCP3464RT-E/NC delivers optimal balance of integration (internal ref, oscillator, burnout, sequencer), low power (<0.96 mA active), and industrial temperature rating in a compact 20-pin UQFN - making it ideal for cost-sensitive, space-constrained embedded sensor nodes.

Availability

MCP3464RT-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 and industrial lifecycles.

Supply support for MCP3464RT-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 is a leading provider of microcontrollers, analog devices, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.

The MCP346xR family was designed specifically for high-accuracy, low-power sensor signal conditioning in harsh environments - integrating precision analog functions, diagnostics, and secure digital interfaces into a single monolithic ADC.

FAQ

What is the maximum supported SPI clock frequency for MCP3464RT-E/NC?

The MCP3464RT-E/NC supports up to 20 MHz SPI clock frequency when DVDD is 2.7–3.6V (per Table 1-1), and up to 10 MHz when DVDD is 1.8–2.7V (per Table 1-2). Timing parameters including tSU (5 ns min), tHD (10 ns min), and tDO (25 ns max) are guaranteed across the full industrial temperature range.

Does MCP3464RT-E/NC support true differential input on all four channels simultaneously?

Yes, the MCP3464RT-E/NC supports four fully differential input pairs (CH0±, CH1±, CH2±, CH3±) with independent programmable gain per channel. The analog multiplexer allows either simultaneous sampling of two differential pairs or sequential scanning of all four, with configurable inter-channel delay and automatic gain/offset calibration.

How does the internal 2.4V reference perform over temperature for MCP3464RT-E/NC?

The MCP3464RT-E/NC internal 2.4V reference has a typical temperature coefficient of 15 ppm/°C over –40°C to +125°C (max 40 ppm/°C). At +25°C, it is trimmed to ±2% absolute accuracy. With chopper stabilization enabled (AZ_VREF = 1), output noise is reduced to 14.3 µV RMS, enhancing DC precision in temperature-varying environments.

Can MCP3464RT-E/NC operate with separate analog and digital supplies?

Yes, MCP3464RT-E/NC requires independent AVDD (2.7–3.6V) and DVDD (1.8–3.6V) supplies, each referenced to their respective ground (AGND and DGND). This separation maintains >126 dB DC CMRR and prevents digital switching noise from degrading analog measurement integrity - critical for high-SFDR applications.

What diagnostic capabilities does MCP3464RT-E/NC provide for sensor health monitoring?

The MCP3464RT-E/NC includes dedicated burnout current sources for open/short detection on all analog input channels, an internal temperature sensor (±5°C accuracy), and CRC-protected configuration registers. These features enable autonomous sensor health checks without host MCU intervention, supporting functional safety requirements in IEC 61508-compliant systems.