TC9402CPD

Overview

The TC9402CPD is a Voltage-to-Frequency and Frequency-to-Voltage converter manufactured by Microchip Technology. It operates on single or dual supplies ranging from +8V to +15V or ±4V to ±7.5V. The device provides a full-scale frequency of 100 kHz with a linearity of 0.25%. It features a gain temperature stability of ±25 ppm/°C and low power dissipation of 27 mW typical. The component is housed in a 14-pin Plastic DIP package.

Feature Summary

• Utilizes charge balancing technique for linear conversion between voltage and frequency domains
• Features open-drain outputs compatible with MOS, CMOS, and TTL logic families
• Includes self-start circuitry to ensure proper operation upon power application
• Supports programmable scale factor via external components

Applications

• Microprocessor data acquisition systems
• Analog data transmission and recording
• Phase locked loops
• Frequency meters and tachometers
• Motor control circuits

Procurement Notes

Verify the specific suffix 'CPD' corresponds to the Plastic DIP package and commercial temperature range (0°C to +70°C). Confirm that the ordering part number matches the exact pinout and electrical specifications required for the design. Check for moisture sensitivity levels and handling requirements during assembly.

Selection Notes

Select this model when a 0.25% linearity specification meets system accuracy requirements. Consider the 14-pin PDIP package for through-hole mounting needs. Ensure supply voltages fall within the specified +8V to +15V or ±4V to ±7.5V ranges. Evaluate thermal dissipation capabilities if operating near maximum temperature limits.

Part Context

This component belongs to the TC9400 series, which includes variants with different linearity specifications such as the TC9400 and TC9401. The TC9402 specifically offers 0.25% linearity compared to higher precision options in the family. All variants share similar functional architectures and pin configurations.

Replacement Considerations

TC9400CPD

FAQ

What is the function of Pin 13?

Pin 13 is designated as NC, indicating there is no internal connection to this pin.

How is the bias current set?

The bias current is set by connecting an external resistor between Pin 1 (IBIAS) and VSS.

What determines the lower limit of the op amp output swing?

The threshold detector sets the lower limit of the op amp output swing, triggering a pulse when the input voltage passes through its threshold.