AS6040-BQFM

Overview

The ScioSense AS6040-BQFM is an ultrasonic flow sensor system-on-chip designed for gas and water metering applications. It integrates a 32-bit CPU, high-voltage charge pump (up to 17.8V), programmable gain amplifier (2V/V to 132V/V), and precision time-to-digital converter. The device supports SPI interface compatibility with host microcontrollers. Operating at 5.6V, it draws a typical current of 15µA during 178µs flight time measurements at 8Hz sampling. It includes 120x32-bit and 3968x8-bit NVRAM for firmware storage, enabling autonomous operation and long-term reliability exceeding 15 years.

Feature Summary

• Integrated 32-bit CPU core with non-volatile memory for autonomous flow calculation and firmware execution
• On-chip high-voltage charge pump generating up to 17.8V to drive external ultrasonic transducers
• Programmable gain amplifier with adjustable gain settings from 2V/V to 132V/V for signal conditioning
• Precision time-to-digital converter enabling low-noise front-end performance for accurate transit time measurement

Applications

• Residential gas meters
• Industrial gas meters
• Clamp-on water meters
• Volume counters

Procurement Notes

Verify the specific suffix BQFM against official ScioSense documentation to confirm package type and pinout configuration. Ensure compatibility with the intended host microcontroller via the SPI interface. Confirm that the required operating voltage range aligns with the system power supply design. Validate that the integrated NVRAM capacity meets the firmware storage requirements for the specific application logic.

Selection Notes

Select this component when designing systems requiring autonomous ultrasonic flow processing without heavy reliance on the host MCU. Consider the integrated high-voltage generation capability if external driver circuits are to be minimized. Evaluate the power consumption profile against battery life requirements, noting the ultra-low current draw during measurement cycles. Ensure the chosen external transducer frequency falls within the supported operational range of the internal drivers.

Part Context

The AS6040 series represents ScioSense's dedicated solution for replacing mechanical flow sensors in utility metering. It consolidates analog front-end, digital signal processing, and control logic into a single package. This integration reduces board space and simplifies the bill of materials compared to discrete solutions. The device is part of a broader family of ultrasonic flow converters optimized for cost-effective and reliable metering infrastructure.

Replacement Considerations

Publicly confirmed direct substitute part numbers for the AS6040-BQFM variant are not available in the provided reference material. Designers should consult ScioSense technical support or authorized distributors for cross-reference information regarding legacy components or alternative packages within the same functional family.