TC9400EJD

Overview

The TC9400EJD is a Voltage-to-Frequency and Frequency-to-Voltage converter manufactured by Microchip Technology. It utilizes low-power CMOS technology to provide linear conversion between analog voltage signals and digital pulse frequencies. The device supports single or dual supply operation, typically ranging from +8V to +15V or ±4V to ±7.5V. Key electrical specifications include a full-scale frequency of 100 kHz, linearity accuracy of 0.05%, and a gain temperature stability of ±25 ppm/°C. It is housed in a 14-pin CERDIP package.

Feature Summary

• Performs bidirectional conversion between voltage and frequency domains with high linearity.
• Operates on charge balancing principles requiring minimal external components.
• Features open-drain outputs compatible with standard 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 extended temperature range (-40°C to +85°C) and the ceramic DIP package type. Confirm that the ordering information matches the manufacturer's current datasheet revision, as package styles and availability may change over time. Ensure compatibility with system voltage requirements before procurement.

Selection Notes

Select this component when precise V/F or F/V conversion is required within an industrial temperature environment. The 0.05% linearity makes it suitable for applications demanding higher accuracy than standard converters. Consider the CERDIP package for through-hole mounting needs where thermal robustness is prioritized over size constraints compared to plastic or surface-mount alternatives.

Part Context

This part belongs to the TC9400 family of converters, which includes variants like the TC9400CPD (plastic DIP) and TC9400COD (SOIC). The 'E' designation indicates an extended temperature range capability, while 'J' specifies the ceramic dual in-line package. This distinguishes it from commercial grade devices limited to 0°C to +70°C operation.

Replacement Considerations

Direct replacements include other members of the TC9400 family such as the TC9400CPD or TC9400COD, provided the package style difference is accommodated by the PCB design. Verify that the substitute part meets the required -40°C to +85°C operating temperature range if environmental conditions necessitate the 'E' grade specification.