MCP3464-E/ST

Analog To Digital Converters (ADC) Overview

The MCP3464-E/ST is a quad-channel, 16-bit Delta-Sigma Analog-to-Digital Converter (ADC) from Microchip Technology. It features a programmable data rate up to 153.6 ksps and an internal sequencer for automatic channel multiplexing in SCAN mode. The device supports analog gains from 0.33x to 64x with a wide input voltage range of 0V to AVDD. Key electrical specifications include a typical SINAD of 97.2 dB at 4800 SPS, low noise of 3.2 µV RMS at Gain = 16x, and minimum RMS effective resolution of 15.5 bits. It operates on separate analog (AVDD: 2.7V-3.6V) and digital (DVDD: 1.8V-3.6V) supplies within an extended temperature range of -40°C to +125°C.

Analog To Digital Converters (ADC) Feature Summary

• Quad-channel architecture supporting differential or single-ended inputs with integrated internal sequencer for SCAN mode operation.
• High-performance 16-bit resolution with programmable gain (0.33x to 64x) and data rates up to 153.6 ksps.
• Advanced security features including 16-bit CRC for SPI communications, register map locking with an 8-bit secure key, and dedicated IRQ pin.
• Integrated internal temperature sensor with burnout current sources for open/short detection.

Analog To Digital Converters (ADC) Applications

• Precision sensor transducers and transmitters for pressure, strain, flow, and force measurement.
• Factory automation and process control systems requiring high accuracy.
• Portable instrumentation devices.
• Temperature measurement applications.

Analog To Digital Converters (ADC) Procurement Notes

Verify the ordering suffix 'E' indicates the extended temperature range (-40°C to +125°C). Confirm the '/ST' suffix corresponds to the 20-lead TSSOP package (6.5 mm x 4.4 mm x 1 mm). Ensure the specific variant matches the quad-channel requirement, as the family includes single and dual-channel options.

Analog To Digital Converters (ADC) Selection Notes

Select this component when four independent channels are required for simultaneous or sequential sampling. Consider the internal sequencer capability if MCU intervention during multi-channel scanning needs to be minimized. Verify that the 16-bit resolution and 153.6 ksps maximum speed align with system bandwidth requirements. Check power supply constraints, as AVDD and DVDD have different minimum voltage requirements.

Analog To Digital Converters (ADC) Part Context

This part belongs to the MCP3461/2/4 family of 16-bit Delta-Sigma ADCs. The MCP3464 specifically denotes the quad-channel version, whereas MCP3461 is single-channel and MCP3462 is dual-channel. All variants share identical core performance characteristics, interface protocols, and package options, differing primarily in the number of available analog input channels.

Analog To Digital Converters (ADC) Replacement Considerations

Direct functional replacements within the same family include MCP3461-E/ST (single-channel) and MCP3462-E/ST (dual-channel), provided fewer channels are acceptable. Cross-vendor replacements require matching 16-bit resolution, I2C/SPI interface compatibility, and similar noise performance metrics.

Analog To Digital Converters (ADC) FAQ

What is the maximum serial clock frequency supported by the MCP3464?

The device supports a maximum Serial Clock (SCK) frequency of 20 MHz when DVDD is between 2.7V and 3.6V. If DVDD is between 1.8V and 2.7V, the maximum SCK frequency is limited to 10 MHz.

How does the internal sequencer function in SCAN mode?

The Internal Conversions Sequencer allows for automatic multiplexing of input channels without continuous MCU communication. It utilizes a 24-bit timer to define time delays between sampling channels and intervals between scan cycles, enabling automated conversion loop sequences.

What security features are included to protect configuration and data integrity?

The MCP3464 includes 16-bit CRC for secure SPI communications, 16-bit CRC and IRQ for securing configuration, and a register map lock protected by an 8-bit secure key. It also features monitor controls for system diagnostics.