Microchip Technology MCP3562RT-E/ST

Overview

MCP3562RT-E/ST from Microchip Technology is a dual-channel, 24-bit delta-sigma analog-to-digital converter (ADC) with programmable gain (0.33× to 64×), up to 153.6 ksps data rate, and integrated 2.4 V voltage reference (15 ppm/°C drift). It features internal temperature sensing, burnout current sources for sensor diagnostics, and SCAN-mode automatic channel sequencing - deployed in high-accuracy industrial pressure and strain transmitters.

For engineers reviewing the MCP3562RT-E/ST datasheet, MCP3562RT-E/ST pinout, MCP3562RT-E/ST application, or MCP3562RT-E/ST equivalent, key selection criteria include differential input impedance vs. gain setting, RMS effective resolution (up to 23.3 bits), SINAD (106.7 dB at 4800 SPS), ultra-low full shutdown current (<2.4 µA), and SPI Mode 0,0/1,1 compatibility at up to 20 MHz.

Technical Context

The MCP3562RT-E/ST implements a 2nd-order modulator with analog gain stage followed by SINC³ digital filtering and 24-bit offset/gain calibration registers. Its internal sequencer supports autonomous multiplexing across two differential channels (CH0/CH1) without MCU intervention, using a 24-bit timer and configurable delay intervals (0–512 DMCLK cycles between samples).

Security is enforced via 16-bit CRC on SPI commands and configuration writes, register map lock with 8-bit secure key, and IRQ-triggered CRC validation. Clocking flexibility includes internal RC oscillator (3.3–6.6 MHz) or external master clock (1–20 MHz), with dedicated MCLK and DRCLK domains for precise timing control.

Key Specifications

Pinout & Package

Package: 20-Lead TSSOP (6.5 mm × 4.4 mm × 1 mm), leaded, RoHS-compliant, with exposed thermal pad not present in this variant.

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 AD7177-2BRUZ, the MCP3562RT-E/ST delivers optimal balance of integrated functionality (internal reference, burnout sources, SCAN sequencer), compact 20-pin TSSOP packaging, and 153.6 ksps throughput - making it ideal for cost-sensitive, space-constrained industrial transmitters requiring self-contained signal conditioning.

Availability

MCP3562RT-E/ST is available at Aetrix Electronics and suitable for precision sensor transducers, factory automation I/O modules, and portable instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MCP3562RT-E/ST 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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory products for industrial, automotive, and consumer applications.

The MCP356xR product line targets high-accuracy sensor signal chains, integrating delta-sigma conversion, diagnostics, and secure configuration to reduce system-level design complexity and bill-of-materials cost.

FAQ

What is the maximum supported SPI clock frequency for the MCP3562RT-E/ST?

The MCP3562RT-E/ST supports up to 20 MHz SPI clock frequency when DVDD is 2.7–3.6 V (per Table 1-1), and up to 10 MHz when DVDD is 1.8–2.7 V (per Table 1-2). Timing margins must be verified per DS20006391C-page 12–13 specifications, including tSU = 5 ns and tHD = 10 ns at 3.3 V. The MCP3562RT-E/ST uses SPI Mode 0,0 and Mode 1,1 only.

Does the MCP3562RT-E/ST support single-ended input configurations?

Yes, the MCP3562RT-E/ST supports single-ended inputs by tying REFIN– to AGND and applying the signal to CH0 or CH1 with respect to AGND. In this mode, the full-scale range becomes VREF/GAIN, and input impedance drops significantly at higher gains (e.g., 20 kΩ at G ≥16×). The MCP3562RT-E/ST datasheet specifies that REFIN– must be grounded for single-ended operation.

How does the internal temperature sensor in the MCP3562RT-E/ST achieve ±5°C accuracy?

The MCP3562RT-E/ST's internal temperature sensor is factory-trimmed and calibrated across the –40°C to +125°C range, delivering ±5°C typical accuracy without user calibration. It shares the same ADC path as analog inputs and is accessed via dedicated register reads. This sensor directly monitors die temperature to support thermal compensation algorithms in pressure or strain measurement systems using the MCP3562RT-E/ST.

Can the MCP3562RT-E/ST operate with separate analog and digital supply voltages?

Yes, the MCP3562RT-E/ST requires independent AVDD (2.7–3.6 V) and DVDD (1.8–3.6 V) supplies, each referenced to their respective ground (AGND and DGND). This separation minimizes digital switching noise coupling into the analog front-end, preserving the 106.7 dB SINAD performance. The MCP3562RT-E/ST specification mandates AGND/DGND connection only at a single point on the PCB to maintain noise isolation.

What is the purpose of the IRQ/MDAT pin on the MCP3562RT-E/ST?

IRQ/MDAT is an active-low, open-drain interrupt pin that signals conversion completion, monitor threshold breaches, or CRC errors. When configured as MDAT, it pulses low for OSR–16 DMCLK cycles upon data readiness (per DS20006391C-page 10). This pin enables deterministic, low-latency synchronization with host MCUs and eliminates the need for continuous SPI polling - a key feature for real-time control loops using the MCP3562RT-E/ST.