TC7106ACKW713

ADCs/DACs - Special Purpose Overview

The TC7106ACKW713 is a low-power, 3-1/2 digit Analog-to-Digital Converter (ADC) manufactured by Microchip Technology. It features a dual-slope integrating architecture with an internal precision reference exhibiting a typical temperature drift of 20 ppm/°C. The device provides high resolution with 0.05% linearity and low noise performance of 15 µV peak-to-peak. It includes auto-zero functionality to eliminate offset errors and supports direct driving of LCD displays. Key electrical parameters include a maximum supply current of 1.8 mA, input leakage current of 10 pA, and operation within a commercial temperature range of 0°C to +70°C.

ADCs/DACs - Special Purpose Feature Summary

• Internal Reference: Features a low temperature drift internal reference (20 ppm/°C typical for 'A' variants).
• Direct Display Drive: Capable of directly driving 3-1/2 digit LCD displays without external drivers.
• Auto-Zero Cycle: Eliminates the need for external zero adjustment by compensating for offset voltages.
• High Input Impedance: Offers high-impedance CMOS differential inputs with 1 pA typical leakage current.

ADCs/DACs - Special Purpose Applications

• Thermometry systems requiring stable temperature measurements.
• Bridge readouts for strain gauges and load cells.
• Digital meters for voltage, current, ohms, and power measurement.
• Portable instrumentation powered by 9V batteries.
• Process monitors and digital scales.

ADCs/DACs - Special Purpose Procurement Notes

Verify the package type corresponds to the specific suffix; the TC7106ACKW713 utilizes a 44-pin MQFP package. Confirm the operating temperature range matches the application requirements, as this variant is specified for commercial temperatures (0°C to +70°C). Ensure that the design accounts for the moisture sensitivity level associated with surface-mount packages during storage and reflow soldering processes.

ADCs/DACs - Special Purpose Selection Notes

Select the TC7106ACKW713 when a drop-in upgrade from older TC7106 models is required with improved temperature stability. Choose this part for applications needing direct LCD drive capability and low power consumption suitable for battery operation. Ensure the external clock frequency is set to achieve the desired conversion rate, typically 3 readings per second at 48 kHz. Verify that the full-scale input voltage range aligns with the available reference voltage options of 100 mV or 1 V.

ADCs/DACs - Special Purpose Part Context

The TC7106A is part of the TC7106/A/TC7107/A family of 3-1/2 digit ADCs. It serves as a low-power alternative to standard versions, offering enhanced thermal stability in the internal reference. The 'K' suffix indicates the MQFP package, while 'W713' denotes the reel packaging format. This component allows existing designs based on the TC7106 to be upgraded without changing external passive component values.

ADCs/DACs - Special Purpose Replacement Considerations

The TC7106A is a drop-in replacement for the TC7106. No changes to external passive components are required to benefit from the lower temperature coefficient of the internal reference. Ensure compatibility with the display type, as the TC7106A drives LCDs, whereas the TC7107A drives LEDs.