CS8190EDWF20G

Specialized ICS Overview

The CS8190EDWF20G is a discontinued precision air-core tachometer and speedometer driver manufactured by onsemi. Designed for automotive applications, it accepts a speed sensor input and generates sine and cosine related output signals to differentially drive an air-core meter movement. The device integrates a high-voltage comparator, charge pump, voltage regulator, and function generator within a 20-SOIC package. It withstands 60 V transients and features return-to-zero functionality. Key electrical parameters include a supply voltage range of 8.5 V to 16 V, a typical supply current of 50 mA at 16 V, and a differential drive current of 33 mA.

Specialized ICS Feature Summary

• Differential Sine/Cosine Output: Generates precise sine and cosine signals to drive air-core meters with high torque and low pointer flutter.
• High Voltage Transient Protection: Withstands 60 V transient pulses, reducing the need for external protection circuitry.
• Integrated Charge Pump and Regulator: Includes an internal bandgap voltage regulator (7.0 V typ) and charge pump for frequency-to-voltage conversion.
• Return to Zero Functionality: Ensures the meter needle returns to the zero position upon power-down or undervoltage conditions.

Specialized ICS Applications

• Automotive Speedometers
• Automotive Tachometers
• Air-Core Meter Driver Circuits

Specialized ICS Procurement Notes

The CS8190EDWF20G is officially discontinued and not recommended for new designs. Verification of availability should focus on obsolete stock or replacement parts such as the CS8190EDWFR20G. Buyers must confirm component authenticity and storage history due to the end-of-life status. Designers are advised to consult onsemi for current alternatives to ensure long-term supply chain stability.

Specialized ICS Selection Notes

Select this component only for maintenance or legacy system repairs where the original air-core meter interface is required. For new designs, consider alternative drivers that support modern packaging or digital interfaces. Ensure the application operates within the specified 8.5 V to 16 V supply range and accounts for the 60 V transient tolerance. Verify that the 20-SOIC package dimensions fit the existing PCB layout constraints.

Specialized ICS Part Context

This part belongs to the CS8190 family of precision tach/speedo drivers. It serves as a specialized interface between vehicle speed sensors and analog air-core gauge movements. The 'EDWF20G' suffix indicates the SO-20W package variant with lead-free construction. It replaces older industry standard drivers like the LM1819, offering improved precision and integrated protection features.

Specialized ICS Replacement Considerations

The CS8190EDWFR20G is listed as a similar replacement option. Both devices share the same core functionality but differ in shipping packaging (Tube vs. Tape & Reel). Designers should verify pin compatibility and thermal characteristics when substituting, although the functional block diagram remains identical.

Specialized ICS FAQ

What is the maximum transient voltage the CS8190 can withstand?

The device can withstand supply voltage transients up to 60 V for pulses less than 100 ms.

How does the CS8190 drive the air-core meter?

It uses differential sine and cosine amplifiers to drive the meter coils, providing higher torque and bidirectional current flow compared to single-ended drivers.

What is the purpose of the Return to Zero feature?

The Return to Zero function ensures that when the supply voltage drops below a specific threshold (typically 6.0 V), the differential drive voltages move the meter needle to the 0° position rather than holding it at the last deflection angle.