TC9402EJD

Overview

The TC9402EJD is a Voltage-to-Frequency and Frequency-to-Voltage converter manufactured by Microchip Technology. It utilizes low-power CMOS technology to generate an output pulse train linearly proportional to the input voltage or provide a voltage output proportional to the input frequency. The device operates with single or dual supplies ranging from +8V to +15V or ±4V to ±7.5V. It features a linearity of 0.25% for both V/F and F/V modes, with a typical gain temperature stability of ±25 ppm/°C. The E-device variant supports an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides highly accurate conversion between analog voltage signals and digital frequency pulses using charge balancing techniques.
• Supports flexible power supply configurations including single-ended (+8V to +15V) and split-rail (±4V to ±7.5V) operation.
• Features open-drain outputs capable of interfacing directly with MOS, CMOS, and TTL logic families.

Applications

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

Procurement Notes

Verify the specific suffix 'EJD' corresponds to the required temperature grade (-40°C to +85°C), package type (CerDIP), and manufacturing status. Confirm that the source documentation explicitly lists this exact part number as available or discontinued before initiating procurement processes.

Selection Notes

Select the TC9402EJD when a linearity specification of 0.25% meets system requirements, distinguishing it from higher precision variants like the TC9401. Ensure the application environment falls within the extended industrial temperature range supported by the 'E' designation and requires the physical dimensions of the 14-pin CerDIP package.

Part Context

This component belongs to the TC9400 family of converters, which includes the TC9400 and TC9401 models. These devices share identical functional architectures but differ in accuracy specifications and temperature ratings. The TC9402 offers lower linearity performance compared to its siblings while maintaining the same core operational characteristics and interface capabilities.

Replacement Considerations

Direct substitutes include the TC9400EJD and TC9401EJD. Note that these alternatives offer different linearity specifications (0.05% and 0.01%, respectively). Verify if the tighter tolerances are necessary or if the original 0.25% linearity is sufficient for the design.