TC820CPL

ADCs/DACs - Special Purpose Overview

The TC820CPL is a 3-3/4 digit multi-measurement system integrating a dual-slope A/D converter, auto-ranging frequency counter, and logic probe. It operates from a single 9V supply with typical power consumption of 10mW. The device features differential inputs with 1pA bias current, an on-chip voltage reference, and direct LCD driving capabilities. Key specifications include a maximum input frequency of 4MHz for the counter, peak-to-peak backplane drive voltage of 5.3V, and low battery detection. It is housed in a 40-lead Plastic DIP package.

ADCs/DACs - Special Purpose Feature Summary

• Integrates 3-3/4 Digit A/D Converter, Auto-Ranging Frequency Counter (up to 4MHz), and Logic Probe
• Low Noise Dual-Slope Architecture with Differential Inputs and 1pA Bias Current
• Direct LCD Drive with Built-in Contrast Control and Decimal Point Drivers
• On-Chip Buzzer Driver and Low Battery Detect with LCD Annunciator

ADCs/DACs - Special Purpose Applications

• Portable digital multimeters and analog measurement instruments
• Frequency counters requiring auto-ranging over four decades
• Logic probes with audible feedback via piezoelectric buzzer
• Peak hold measurement systems for motor starting current or temperature

ADCs/DACs - Special Purpose Procurement Notes

The TC820CPL is classified as an obsolete device by Microchip Technology. Verification of availability should focus on surplus distributors or secondary markets, as standard manufacturing channels no longer support this part number. Ensure component authenticity when sourcing from non-OEM suppliers due to its discontinued status.

ADCs/DACs - Special Purpose Selection Notes

Select the TC820CPL for designs requiring high integration of voltage, frequency, and logic measurement functions in a single package. It is suitable for battery-powered applications due to low power consumption and built-in low battery detection. Consider the 40-pin PDIP package constraints and ensure compatibility with triplex LCD displays. Note that this device is obsolete; evaluate replacement options if long-term production stability is required.

ADCs/DACs - Special Purpose Part Context

The TC820CPL belongs to the TC820 family, which supersedes older devices like the TC7106 by offering higher resolution and additional features such as frequency counting and logic probing. The 'CPL' suffix denotes the 40-lead Plastic DIP package variant within the TC820 series, which also includes surface mount options like the CKW (PQFP) and CLW (PLCC).

ADCs/DACs - Special Purpose Replacement Considerations

As the TC820CPL is obsolete, verify if newer Microchip ADCs or third-party compatible parts meet the specific requirements for 3-3/4 digit resolution, frequency counting, and logic probing. Check pinout compatibility if direct replacement is intended.