ADS7820P

Analog To Digital Converters (ADC) Overview

The ADS7820P is a 12-bit CMOS Analog-to-Digital Converter (ADC) manufactured by Texas Instruments. It operates on a single +5V supply and features a sampling rate of 100kHz with a throughput time of 10µs. The device includes an internal sample/hold circuit, clock, and reference, supporting a 0 to +5V analog input range. Key electrical specifications include ±1 LSB maximum Integral Nonlinearity (INL) and Differential Nonlinearity (DNL), and a Signal-to-Noise Ratio (SNR) of 70dB minimum at 45kHz input frequency. Power dissipation is limited to 100mW maximum.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with 100kHz sampling rate and 10µs complete cycle time
• Single +5V supply operation with power dissipation under 100mW
• Internal 2.5V reference or external reference capability (2.3V to 2.7V)
• Full parallel data output with three-state drivers and byte-select functionality

Analog To Digital Converters (ADC) Applications

• Industrial process control systems requiring 12-bit precision
• Battery-powered instrumentation due to low power consumption
• Data acquisition systems with microprocessor interfaces
• Medical monitoring equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix for package type: 'P' denotes Plastic DIP and 'U' denotes SOIC. Confirm RoHS compliance status as manufacturing status may vary. Check for obsolete status indicators in current distributor catalogs, as production of this component has been discontinued by the manufacturer.

Analog To Digital Converters (ADC) Selection Notes

Select the ADS7820P when a 12-bit resolution and 100kHz throughput are required with a 0-5V input range. Ensure the application can accommodate a single +5V supply. Consider pin-compatible alternatives like the ADS7821 if higher 16-bit resolution is needed, noting that layout requirements for reducing digital feedthrough become more critical at higher resolutions.

Analog To Digital Converters (ADC) Part Context

The ADS7820 is part of the Burr-Brown family of ADCs acquired by Texas Instruments. It is designed for general-purpose data acquisition applications. The device is pin-compatible with the 16-bit ADS7821, allowing for design flexibility within the same footprint while varying resolution requirements.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS7820P is listed as obsolete. Direct pin-compatible replacements include the ADS7821 (16-bit) or other members of the ADS78xx series, though resolution and interface characteristics will differ. Verify availability of alternative packages such as the ADS7820U (SOIC).