Texas Instruments Frequency to Voltage Converter ±28V DIP-8

This Frequency to Voltage Converter from Texas Instruments features a high-gain op-amp and comparator, designed to operate a relay, lamp, or other load when the input frequency reaches or exceeds a selected rate. Utilising a charge pump technique, the tachometer offers frequency doubling for low ripple, full input protection, and an output that swings to ground for a zero frequency input.

The op-amp/comparator is fully compatible with the tachometer and utilises a floating transistor as its output. This feature allows either a ground or supply-referred load of up to 50mA. This 8-pin device includes an internal connection between the tachometer output and the op-amp non-inverting input, along with an active shunt regulator connected across the power leads. The regulator clamps the supply, ensuring stable frequency-to-voltage and frequency-to-current operations with any supply voltage and a suitable resistor.

Key Features and Protection

• Floating Transistor Output: Allows ground or supply-referred loads up to 50mA
• Low Ripple: Frequency doubling capability
• Built-in Hysteresis: Supports differential or ground-referenced inputs
• Input Protection: Ground-referenced tachometer is protected from swings above VCC and below ground
• ESD Handling: Features limited built-in ESD protection; leads should be shorted or placed in conductive foam during storage to prevent electrostatic damage to the MOS gates
• Eco-Friendly: Green product with no Sb/Br