MCP3564

Part: MCP3564 — Microchip Technology Inc.

Type: 24-bit Delta-Sigma Analog-to-Digital Converter (ADC)

Description: 24-bit Delta-Sigma ADC with 8 single-ended/4 differential inputs, programmable gain from 1/3x to 64x, configurable oversampling ratio from 32 to 98304, and an internal temperature sensor.

Operating Conditions:

• Oversampling Ratio (OSR): 32 to 98304
• Analog Gain: 1/3x to 64x
• Digital Gain: 1x to 4x

Key Specs:

• Resolution: 24-bit
• Input Channels: 8 single-ended, 4 differential
• DC Common-mode Rejection Ratio (CMRR): -126 dB (V_INCOM varies from 0V to AVDD, V_IN = 0V)
• AC Common-mode Rejection Ratio (CMRR): -122 dB (V_INCOM = 0 dB at 50 Hz, V_IN = 0V)
• RMS Noise (min): 0.09 μV (Total OSR = 98304, GAIN = 16)
• Effective Number of Bits (ENOB, max RMS): 23.3 bits (Total OSR = 98304, GAIN = 0.33)

Features:

• Oversampling Delta-Sigma architecture
• Programmable gain stage (analog and digital)
• Differential reference voltage input option
• Internal oscillator
• Internal temperature sensor
• Burnout current source for open/short circuit detection
• Dynamic reconfigurability of OSR and Gain settings

Applications:

• Weight scale design
• Bridge-based sensors

The MCP3564 Analog-to-Digital Converter utilizes an oversampling Delta-Sigma architecture to achieve a 24-bit resolution.

The MCP3564 offers eight single-ended and four differential analog input channels with a programmable gain stage with gain factors from 1/3x to 64x. In addition, the device has the option for differential reference voltage input. It also includes an internal oscillator, an internal temperature sensor and a burnout current source used for open/short circuit detection of external sensors.

When using differential inputs, the input signal is defined by Equation 3.