Microchip Technology MCP3564T-E/NC

Overview

MCP3564T-E/NC from Microchip Technology is a quad-channel, 24-bit delta-sigma ADC with programmable gain (0.33x–64x), 153.6 ksps max data rate, and integrated burnout current sources for sensor open/short detection. It operates from 2.7V to 3.6V AVDD and -40°C to +125°C, supporting precision pressure and strain measurement in industrial transmitters.

For engineers reviewing the MCP3564T-E/NC datasheet, MCP3564T-E/NC pinout, MCP3564T-E/NC application, or MCP3564T-E/NC equivalent, key selection criteria include differential input channel count (4), RMS ENOB up to 23.3 bits, internal temperature sensor (±5°C accuracy), SCAN-mode automatic sequencing, and SPI interface compliance with modes 0,0 and 1,1 at up to 20 MHz.

Technical Context

The MCP3564T-E/NC implements a second-order delta-sigma modulator with digital SINC³ filtering, configurable oversampling ratio (32–98304), and analog gain stages enabling high-resolution DC and low-frequency AC measurements. Its internal sequencer supports autonomous multiplexed conversions across four differential channels without MCU intervention.

Security-critical operation is enabled by 16-bit CRC on SPI commands and configuration registers, plus an 8-bit secure key lock for register map protection. The device uses either an internal RC oscillator (3.3–6.6 MHz) or external clock (1–20 MHz) and features dedicated IRQ/MDAT pin for synchronization and diagnostic monitoring.

Key Specifications

Pinout & Package

Package: 3 mm × 3 mm, 20-lead UQFN with exposed thermal pad (EP). Pin compatibility confirmed per DS20006181B-page 2 (MCP3564-specific layout).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS1263IPBSR and MAX11270ETJ+, the MCP3564T-E/NC uniquely combines quad-channel differential input, autonomous SCAN sequencing, burnout fault detection, and CRC-secured configuration - making it optimal for compact, self-diagnosing industrial sensor nodes requiring minimal host MCU intervention.

Availability

MCP3564T-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 extended temperature ranges and long production lifecycles.

Supply support for MCP3564T-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 microcontroller, mixed-signal, analog, and Flash-IP solutions, headquartered in Chandler, Arizona.

The MCP356x family was designed specifically for high-accuracy, low-noise industrial and scientific measurement systems requiring integrated diagnostics, autonomous operation, and robust security - targeting applications where sensor integrity and data trustworthiness are critical.

FAQ

What is the maximum supported SPI clock frequency for MCP3564T-E/NC?

The MCP3564T-E/NC supports up to 20 MHz SPI clock frequency when DVDD is 2.7–3.6 V, compliant with SPI modes 0,0 and 1,1. At DVDD = 1.8–2.7 V, maximum SCK is reduced to 10 MHz per DS20006181B-page 11. This timing allows direct interfacing with high-speed MCUs without additional level-shifting or clock division logic in the MCP3564T-E/NC design.

Does MCP3564T-E/NC support true differential input on all four channels simultaneously?

Yes, the MCP3564T-E/NC supports four independent differential input pairs (CH0/CH1, CH2/CH3, CH4/CH5, CH6/CH7) as shown in the TSSOP package diagram on DS20006181B-page 3. Each pair can be configured for differential measurement with programmable gain, and the internal analog multiplexer routes them to the delta-sigma modulator sequentially or via SCAN mode - enabling true differential acquisition across all channels in a single device.

How does the internal temperature sensor in MCP3564T-E/NC improve system accuracy?

The MCP3564T-E/NC internal temperature sensor provides ±5°C accuracy over -40°C to +125°C and is used to compensate for temperature-induced gain/offset drift in external sensors (e.g., strain gauges, RTDs). By reading the die temperature alongside analog measurements, the host MCU can apply real-time correction coefficients - improving overall system accuracy without requiring external temperature sensing components in the MCP3564T-E/NC-based design.

Can MCP3564T-E/NC operate with an external reference voltage?

Yes, the MCP3564T-E/NC accepts differential external references via REFIN+ and REFIN- pins, supporting reference voltages from 0.6 V to AVDD. This enables ratiometric measurements (e.g., with bridge sensors) or high-precision absolute measurements using a low-drift external reference - unlike internal reference-only ADCs. The device maintains >120 dBc SFDR and 106.7 dB SINAD even with external references, as verified in DS20006181B-page 8.

What is the purpose of the NC pins on the MCP3564T-E/NC UQFN package?

The NC pins (1, 2, 3, 4, 17, 18, 19, 20) on the MCP3564T-E/NC UQFN package are not internally connected and must be tied to AGND per DS20006181B-page 3. This improves electromagnetic immunity and thermal dissipation by providing low-impedance grounding paths adjacent to sensitive analog circuitry - a mandatory layout requirement for achieving specified 106.7 dB SINAD and -116 dBc THD performance in the MCP3564T-E/NC design.