Frequency-to-Digital Converter for MEMS Resonators

Overview

The MVFD01 is a programmable frequency-to-digital converter that is designed to be easily integrated with MEMS resonators. The chip features a versatile low noise amplifier (LNA) with a programmable gain and feedthrough capacitance cancellation, in order to accommodate different MEMS resonators.
The ASIC is also equipped with a programmable pulse-width-modulation (PWM) driver. This output is available on multiple pads, and its duty cycle can be controlled to drive varying currents through heater resistors that are often used with MEMS resonators.

Key Features

Supports resonators up to 3MHz
Extended supply voltage range: 2.7 to 5.5V
Wide operating temperature range: -40 to 85°C
Trimmable feedthrough capacitance-cancelation feature, to ensure oscillation and improve noise performance
Low-noise and high-gain oscillator circuit that supports resonators with motional resistances up to 50k
Operating temperature range from -40 to 85°C
Frequency resolution settings up to 16-Bit
Supports I2C and UART communication protocols
Optional external crystal interface for low noise measurements
Low standby currents <12nA

Block Diagram

Applications

Microbalances
Biosensing

Technical Specifications

Foundry, Node

TSMC 0.18um

Maturity

Silicon Proven

Availability

Available

TSMC

Silicon Proven: 180nm

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