BU9817FV

ADCs/DACs - Special Purpose Overview

The BU9817FV is a multimedia IC featuring a 4-channel, 8-bit A/D converter and overvoltage detector with an I2C BUS interface. Designed for temperature sensing applications using external thermistors, it supports operating voltages from 3.0V to 5.5V. The device includes programmable detection levels, independent comparison voltage settings, and extremely low current consumption suitable for portable equipment. It operates within a temperature range of -15°C to +75°C and utilizes a 14-pin SSOP-B14 package.

ADCs/DACs - Special Purpose Feature Summary

• Four-channel 8-bit A/D conversion capability for temperature monitoring
• Built-in I2C BUS interface for host communication
• Programmable detection levels and independent comparison voltage settings per channel
• Extremely low operating current optimized for portable devices

ADCs/DACs - Special Purpose Applications

• Notebook computers
• Desktop computers
• Household electric appliances

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific package variant (SSOP-B14) and ordering suffixes against the manufacturer's latest documentation before procurement. Confirm that the application environment remains within the specified operating temperature range of -15°C to +75°C. Ensure the power supply voltage stays between 3.0V and 5.5V to maintain electrical characteristics.

ADCs/DACs - Special Purpose Selection Notes

Select this component when a multi-channel temperature monitoring solution with digital output is required. The built-in comparators allow for hardware-based threshold detection without continuous host polling. Ensure the system design accommodates the 32.768kHz clock input requirement for the ADC block and comparator operation.

ADCs/DACs - Special Purpose Part Context

This part belongs to ROHM Semiconductor's multimedia IC lineup, specifically categorized as a sensor interface device. It serves as a bridge between analog thermal sensors and digital controllers, simplifying system architecture by integrating ADC and logic functions into a single compact package.

ADCs/DACs - Special Purpose Replacement Considerations

No direct replacement part numbers are documented in the provided source material. Engineers should evaluate other ROHM 4-channel sensor interfaces or general-purpose ADCs with I2C interfaces if pin compatibility is not strictly required.

ADCs/DACs - Special Purpose FAQ

What is the resolution of the internal A/D converter?

The BU9817FV features an 8-bit resolution for its analog-to-digital conversion process.

How is the STOPB pin utilized?

The STOPB pin controls the reset and power save modes. Setting it low resets internal circuits and stops ADC operation, entering power save mode, while high enables normal operation based on register settings.

What is the typical current consumption in shutdown mode?

In shutdown mode, the typical circuit current consumption is less than 1µA.