ADS7820PB

Analog To Digital Converters (ADC) Overview

The ADS7820PB is a 12-bit CMOS Analog-to-Digital Converter (ADC) manufactured by Texas Instruments. It features a sampling rate of 100 kHz and operates on a single +5V supply. The device integrates a sample/hold circuit, internal reference, clock logic, and three-state parallel output drivers. It accepts a 0 to +5V analog input range with straight binary coding. Key electrical specifications include a maximum power dissipation of 100 mW and an operating temperature range from -40°C to +85°C. The component is housed in a 28-pin Plastic DIP package.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with 100 kHz minimum throughput rate
• Single +5V supply operation with 100 mW max power dissipation
• Integrated sample/hold, clock, and reference circuits
• Full parallel data output with three-state drivers

Analog To Digital Converters (ADC) Applications

• Data acquisition systems requiring 12-bit precision
• Industrial process control monitoring
• Portable instrumentation powered by single supplies

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific grade suffix 'B' for improved linearity specifications (+/-0.5 LSB INL/DNL) compared to standard grades. Confirm package integrity for the 28-pin PDIP format. Check manufacturer status as this part may be classified as obsolete; validate availability through authorized distributors or lifetime buy programs if sourcing for new production.

Analog To Digital Converters (ADC) Selection Notes

Select the ADS7820PB when a 12-bit resolution and 100 kHz sampling speed are required within a single +5V supply constraint. Ensure the application can accommodate the 0 to +5V input range without external scaling. Consider the pin-compatible ADS7821 if higher 16-bit resolution is needed, noting that layout requirements for ground separation become more critical at higher resolutions.

Analog To Digital Converters (ADC) Part Context

The ADS7820PB belongs to the ADS782x family of high-speed CMOS ADCs. It is pin-compatible with the 16-bit ADS7821, allowing for design flexibility across resolution requirements. The 'PB' suffix specifically denotes the Plastic DIP package variant with enhanced linearity performance compared to the standard 'P' grade.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS7821 is a pin-compatible alternative offering 16-bit resolution. For direct replacement, verify that the system can support the different timing characteristics and that the PCB layout accounts for the increased sensitivity to digital noise associated with higher-resolution converters.