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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Microchip Technology MCP3565RT-E/SFX

Name: MCP3565RT-E/SFX
Brand: Microchip Technology
SKU: MCP3565RT-E/SFX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MCP3565RT-E/SFX

Manufacturer:: Microchip Technology

Category:: Analog to Digital Converters (ADC)

Package:: 12-UFQFN Exposed Pad

Datasheet:: MCP3565RT-E/SFX.pdf

Description:: IC ADC 24BIT SIGMA-DELTA 12UQFN

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Product details

Overview

MCP3565RT-E/SFX from Microchip Technology is a 24-bit delta-sigma analog-to-digital converter (ADC) with one differential or two single-ended input channels, programmable gain (0.33x–64x), up to 153.6 ksps data rate, and integrated 2.4V voltage reference (15 ppm/°C drift). It delivers 106.7 dB SINAD and -116 dBc THD at 4800 SPS (Gain = 1x), enabling high-precision sensor signal digitization in industrial transmitters.

For engineers reviewing the MCP3565RT-E/SFX datasheet, MCP3565RT-E/SFX pinout, MCP3565RT-E/SFX application, or MCP3565RT-E/SFX equivalent, key selection considerations include its ultra-low noise (90 nVRMS at 12.5 SPS, Gain = 16x), internal temperature sensor (±5°C accuracy), burnout current sources for open/short detection, and secure SPI interface with 16-bit CRC and register map lock.

Technical Context

The MCP3565RT-E/SFX employs a 62nd-order delta-sigma modulator with programmable analog gain and digital SINC3 filtering. Its internal sequencer (SCAN mode) supports automatic multiplexing across two input channels using a 24-bit timer, eliminating MCU intervention during conversion loops.

It features dual clock options - internal RC oscillator (3.3–6.6 MHz) or external master clock (up to 20 MHz) - and supports SPI Mode 0,0 and 1,1 at up to 20 MHz. The device integrates offset/gain calibration registers, chopper-stabilized reference buffer, and differential voltage reference inputs for flexible system-level signal conditioning.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	24-bit delta-sigma ADC with no missing codes (OSR ≥256); enables 1 ppm-level measurement fidelity in precision sensor systems.
Data Rate	Programmable up to 153.6 ksps; allows real-time monitoring of fast-changing physical parameters like flow or vibration.
Analog Input Range	0 V to AVDD (2.7–3.6 V) with differential input range ±VREF/GAIN; supports direct connection to unbuffered bridge sensors.
Reference Voltage	Internal 2.4 V ±2% reference with 15 ppm/°C drift (–40°C to +125°C); eliminates need for external precision reference in cost-sensitive designs.
Power Consumption	Ultra-low full shutdown current < 2.4 µA; extends battery life in portable instrumentation and wireless sensor nodes.
Temperature Range	Specified from –40°C to +125°C; suitable for under-hood automotive, factory automation, and harsh industrial environments.
SPI Interface	20 MHz compatible, Mode 0,0 and 1,1; enables seamless integration with ARM Cortex-M, PIC, and RISC-V microcontrollers via DMA-accessible 24/32-bit data formats.

Pinout & Package

Package: 2 mm × 2 mm × 0.55 mm, 12-lead UQFN with exposed thermal pad (EP).

Pin/Terminal	Circuit Role	Design Meaning
1 (EP)	Exposed Thermal Pad	Internally connected to AGND; must be soldered to PCB ground plane for thermal dissipation and noise immunity.
2 (AGND)	Analog Ground	Reference for analog circuitry; requires separate low-impedance connection to system AGND to minimize PSRR degradation.
3 (REFIN–)	Reference Input Negative	Ground reference for internal 2.4 V reference or external differential reference; must be tied to AGND for single-ended operation.
4 (REFIN+)	Reference Input Positive	Output of internal 2.4 V reference or positive input for external reference; bypass capacitor required for stability.
5 (CH1)	Channel 1 Input	Second analog input for single-ended or differential pair with CH0; supports burnout current sourcing for sensor diagnostics.
6 (CH0)	Channel 0 Input	Primary analog input; used with CH1 for differential measurements or independently for single-ended sensing.
7 (CS)	Chip Select	Active-low SPI enable; timing-critical for synchronization - tCSS = 25 ns (DVDD ≥2.7 V) ensures reliable multi-device bus sharing.
8 (AVDD)	Analog Supply	2.7–3.6 V analog power rail; powers modulator, reference, and analog front-end; decoupling near pin essential for SINAD performance.
9 (DVDD)	Digital Supply	1.8–3.6 V digital supply; independent from AVDD to support mixed-voltage MCU interfaces and reduce digital noise coupling.
10 (DGND)	Digital Ground	Reference for SPI I/O and digital logic; must be connected to AGND at single point to prevent ground loops.
11 (SDO)	Serial Data Output	SPI master-out slave-in output; tri-state when CS high; tDO = 25 ns (DVDD ≥2.7 V) enables high-speed readout without timing margin loss.
12 (SDI)	Serial Data Input	SPI master-in slave-out input; accepts 8-bit commands and configuration writes; Schmitt-triggered for noise immunity on noisy boards.
13 (SCK)	Serial Clock	SPI clock input; supports up to 20 MHz; tHI/tLO ≥20 ns ensures robust timing margin across temperature and voltage ranges.

Key Features

Feature	Design Value
Internal Sequencer (SCAN mode)	Automates conversion sequences across CH0/CH1 with programmable inter-channel delay (0–512 DMCLK periods) and cycle interval (0–16.7M DMCLK periods), reducing firmware overhead in multi-sensor systems.
Burnout Current Sources	Integrated constant-current sources detect open-circuit or short-circuit conditions in RTD, thermistor, or strain gauge bridges - eliminating external diagnostic circuitry.
Secure SPI Interface	16-bit CRC on all SPI transactions plus IRQ-triggered CRC on configuration writes; prevents unauthorized register modification in safety-critical applications.
Calibration Registers	24-bit digital offset and gain error correction registers allow one-time factory calibration to compensate for sensor nonlinearity and board-level drift.
Low-Temperature Drift	Offset error drift as low as 4 nV/°C (Gain = 1x, AZ_MUX = 1) and gain error drift of 0.5 ppm/°C ensure stable accuracy over extended industrial temperature range.
Internal Temperature Sensor	On-die diode-based sensor with ±5°C accuracy provides system-level thermal monitoring without requiring external ICs or routing complexity.

Applications

Pressure Transmitter	Strain Gauge Readout
Use Scenario: Digitizing mV-level output from piezoresistive pressure sensors in HVAC and process control transmitters. IC Role / Device Role / Timing Role: Primary ADC with integrated 2.4 V reference and burnout detection, performing synchronized differential sampling of bridge outputs. Use Value: Eliminates external reference and excitation circuitry while maintaining 106.7 dB SINAD and <10 ppm INL - enabling 0.05% FS accuracy over –40°C to +125°C.	Use Scenario: High-resolution acquisition of Wheatstone bridge signals from load cells in industrial weighing systems. IC Role / Device Role / Timing Role: Delta-sigma ADC with programmable gain (up to 64x) and SCAN-mode auto-sequencing across multiple bridge channels. Use Value: Achieves 23.3-bit effective resolution at 12.5 SPS (Gain = 16x), resolving sub-microstrain changes without external amplification or filtering.
Portable Gas Analyzer	Factory Automation Controller
Use Scenario: Battery-powered handheld analyzers measuring electrochemical sensor currents with ultra-low noise floor. IC Role / Device Role / Timing Role: Low-power ADC with full shutdown current <2.4 µA and internal temperature sensor for compensation. Use Value: Enables >10-hour runtime on coin-cell batteries while delivering 90 nVRMS noise performance and ±5°C thermal monitoring for sensor linearization.	Use Scenario: Modular PLC I/O modules acquiring analog signals from multiple field sensors in real time. IC Role / Device Role / Timing Role: Configurable ADC with 20 MHz SPI interface and DMA-compatible data formats for deterministic data transfer to Cortex-M7 host. Use Value: Supports 153.6 ksps throughput across dual channels, enabling simultaneous sampling of 4–20 mA loop receivers and thermocouple inputs within single-cycle scan windows.

Pressure Transmitter

Strain Gauge Readout

Use Scenario: Digitizing mV-level output from piezoresistive pressure sensors in HVAC and process control transmitters.

IC Role / Device Role / Timing Role: Primary ADC with integrated 2.4 V reference and burnout detection, performing synchronized differential sampling of bridge outputs.

Use Value: Eliminates external reference and excitation circuitry while maintaining 106.7 dB SINAD and <10 ppm INL - enabling 0.05% FS accuracy over –40°C to +125°C.

Use Scenario: High-resolution acquisition of Wheatstone bridge signals from load cells in industrial weighing systems.

IC Role / Device Role / Timing Role: Delta-sigma ADC with programmable gain (up to 64x) and SCAN-mode auto-sequencing across multiple bridge channels.

Use Value: Achieves 23.3-bit effective resolution at 12.5 SPS (Gain = 16x), resolving sub-microstrain changes without external amplification or filtering.

Portable Gas Analyzer

Factory Automation Controller

Use Scenario: Battery-powered handheld analyzers measuring electrochemical sensor currents with ultra-low noise floor.

IC Role / Device Role / Timing Role: Low-power ADC with full shutdown current <2.4 µA and internal temperature sensor for compensation.

Use Value: Enables >10-hour runtime on coin-cell batteries while delivering 90 nVRMS noise performance and ±5°C thermal monitoring for sensor linearization.

Use Scenario: Modular PLC I/O modules acquiring analog signals from multiple field sensors in real time.

IC Role / Device Role / Timing Role: Configurable ADC with 20 MHz SPI interface and DMA-compatible data formats for deterministic data transfer to Cortex-M7 host.

Use Value: Supports 153.6 ksps throughput across dual channels, enabling simultaneous sampling of 4–20 mA loop receivers and thermocouple inputs within single-cycle scan windows.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADS1263IPW	32-bit resolution, 40 ksps max, integrated PGA with 128x gain, no internal reference; requires external 2.5 V reference.	Higher resolution but lower speed; better suited for static weight measurement than dynamic flow sensing.	Select ADS1263IPW when absolute 0.1 ppm linearity is required and system design accommodates external reference and larger PCB footprint.
MAX11270ETJ+	24-bit resolution, 10 ksps max, internal 2.5 V reference (8 ppm/°C), no SCAN sequencer or burnout sources.	Limited data rate and no built-in sensor diagnostics; best for low-channel-count, low-update-rate applications.	Choose MAX11270ETJ+ for space-constrained medical devices where ultra-low power (<1 µA shutdown) outweighs need for auto-sequencing or open-wire detection.

Compared with ADS1263IPW and MAX11270ETJ+, the MCP3565RT-E/SFX uniquely combines 153.6 ksps throughput, integrated 2.4 V reference, on-chip SCAN sequencer, and burnout current sources - making it optimal for compact, self-diagnosing industrial sensor nodes requiring both speed and precision.

Availability

MCP3565RT-E/SFX is available at Aetrix Electronics and suitable for precision sensor transducers, factory automation controllers, and portable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MCP3565RT-E/SFX 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 components, and Flash-IP solutions, serving industrial, automotive, and consumer markets with high-reliability silicon and development tools.

The MCP3565R product line delivers high-accuracy, low-power delta-sigma ADCs optimized for sensor signal conditioning in harsh environments - emphasizing integrated diagnostics, secure configuration, and minimal external component count.

FAQ

What is the maximum achievable data rate for the MCP3565RT-E/SFX?

The MCP3565RT-E/SFX supports a programmable data rate up to 153.6 ksps. This maximum rate is achieved at OSR = 32 and Gain = 1x, with MCLK = 4.9152 MHz. At higher gains or oversampling ratios, the effective output rate decreases proportionally - for example, at OSR = 256 and Gain = 16x, the rate drops to 4.8 ksps. The device's SCAN mode maintains this rate across both input channels without CPU intervention.

Does the MCP3565RT-E/SFX require an external voltage reference?

No, the MCP3565RT-E/SFX includes a selectable internal 2.4 V voltage reference with 15 ppm/°C drift over –40°C to +125°C, eliminating the need for external references in most precision applications. When enabled (VREF_SEL = 1), it drives the REFIN+/OUT pin and supports bypass capacitors down to 0.1 µF. External references can still be used via REFIN+/– pins if tighter initial accuracy or lower drift is required.

How does the SCAN mode function in the MCP3565RT-E/SFX?

The SCAN mode in the MCP3565RT-E/SFX uses an internal 24-bit timer and configurable delay registers to automatically sequence conversions across CH0 and CH1 without MCU involvement. TDLY_SCAN (0–512 DMCLK) sets inter-channel delay, while TTIMER_SCAN (0–16.7M DMCLK) defines full cycle interval. This enables deterministic, jitter-free multi-channel acquisition ideal for PLC analog input modules and synchronized sensor arrays.

What security features does the MCP3565RT-E/SFX provide for SPI communication?

The MCP3565RT-E/SFX implements three hardware-level security features: (1) 16-bit CRC protection on all SPI data transfers, (2) separate 16-bit CRC + IRQ flag for configuration register writes, and (3) register map lock with 8-bit secure key to prevent unauthorized access. These features ensure integrity of both data and configuration in industrial control systems where tampering or corruption could compromise safety or accuracy.

Can the MCP3565RT-E/SFX measure temperature directly?

Yes, the MCP3565RT-E/SFX integrates an on-die temperature sensor with ±5°C accuracy across –40°C to +125°C. It is accessible via dedicated register reads and requires no external components. This sensor is commonly used for real-time compensation of sensor offset/gain drift or for system thermal monitoring - especially valuable in unattended remote instrumentation where external temperature ICs add cost and routing complexity.

MCP3565RT-E/SFX Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 12-UFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Number of Bits:: 24

Sampling Rate (Per Second):: 153.6k

Number of Inputs:: 1, 2

Input Type:: Differential, Single Ended

Data Interface:: SPI

Configuration:: MUX-S/H-ADC

Ratio - S/H:ADC:: -

Number of A/D Converters:: 1

Architecture:: Sigma-Delta

Reference Type:: External, Internal

Voltage - Supply, Analog:: 2.7V ~ 3.6V

Voltage - Supply, Digital:: 1.8V ~ 3.7V

Features:: Temperature Sensor, Internal Oscillator

Operating Temperature:: -40°C ~ 125°C

Supplier Device Package:: 12-UQFN (2x2)

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

MCP3565RT-E/SFX FAQ

1.How can I place an order for MCP3565RT-E/SFX through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP3565RT-E/SFX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MCP3565RT-E/SFX reliable?

The price and inventory of MCP3565RT-E/SFX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP3565RT-E/SFX is usually 5 days.

3.What payment methods are accepted for MCP3565RT-E/SFX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP3565RT-E/SFX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MCP3565RT-E/SFX?

MCP3565RT-E/SFX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP3565RT-E/SFX order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MCP3565RT-E/SFX?

For technical support, including MCP3565RT-E/SFX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP3565RT-E/SFX requirements.

6.How does Aetrix verify that MCP3565RT-E/SFX is sourced from the original manufacturer or authorized distributors?

All MCP3565RT-E/SFX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MCP3565RT-E/SFX meets industry standards.

7.What is the process for return or replacement of MCP3565RT-E/SFX?

All MCP3565RT-E/SFX units undergo pre-shipment inspection (PSI). If there is an issue with MCP3565RT-E/SFX, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MCP3565RT-E/SFX part is unused and in its original packaging.

Return procedure for MCP3565RT-E/SFX:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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