ADS7812P

Analog To Digital Converters (ADC) Overview

The ADS7812P is a low-power, single +5V supply, 12-bit sampling analog-to-digital converter manufactured by Texas Instruments. It integrates a capacitor-based successive approximation register (SAR) A/D with a sample/hold circuit, clock, reference, and serial data interface. The device supports multiple input ranges including ±10V, ±5V, 0V to 10V, and 0.5V to 4.5V, with high impedance options exceeding 10MΩ. It operates at a throughput rate of 40kHz over the –40°C to +85°C temperature range. Key electrical specifications include a maximum conversion time of 20µs, power dissipation of 35mW, and a power-down mode consuming 50µW. The part is housed in a 0.3-inch DIP-16 package.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with ±0.5LSB maximum integral and differential nonlinearity error
• Flexible SPI-compatible serial interface supporting internal or external clock synchronization
• Multiple configurable analog input ranges via resistor connections, including ±10V and unipolar options
• Low power consumption of 35mW during operation and 50µW in power-down mode

Analog To Digital Converters (ADC) Applications

• Data acquisition systems
• Industrial control applications
• Test equipment
• Digital signal processing

Analog To Digital Converters (ADC) Procurement Notes

Verify the ordering suffix 'P' corresponds to the 0.3-inch DIP-16 package as specified in the datasheet. Confirm that the required input voltage ranges and interface timing requirements align with the device's absolute maximum ratings and serial communication specifications before procurement.

Analog To Digital Converters (ADC) Selection Notes

Select the ADS7812P when a 12-bit SAR ADC with low power consumption and flexible input ranging is required. Ensure the system can accommodate the 40kHz maximum sampling rate and the specific serial clock timing constraints for either internal or external DATACLK modes. Consider pin compatibility with the ADS7813 if future upgrades to 16-bit resolution are anticipated.

Analog To Digital Converters (ADC) Part Context

The ADS7812P belongs to the ADS7812 family of low-power serial ADCs from Texas Instruments. It is pin-compatible with the 16-bit ADS7813, allowing for design flexibility between different resolution requirements without changing the PCB layout. The 'P' suffix specifically denotes the plastic dual in-line package variant suitable through-hole mounting.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS7813 is a pin-compatible alternative offering 16-bit resolution. When replacing the ADS7812P with the ADS7813, account for the approximately 133% longer conversion time and adjust the serial interface logic to handle the additional bits.