ADS7822E/2K5G4

Analog To Digital Converters (ADC) Overview

The ADS7822E/2K5G4 is a 12-bit successive approximation register (SAR) analog-to-digital converter manufactured by Texas Instruments. It features a sampling rate of 200 kSPS and operates with an analog supply voltage range of 2.7 V to 5.25 V. The device utilizes a pseudo-differential or single-ended input architecture and communicates via a 3-wire serial interface compatible with standard SPI modes. Packaged in an 8-pin VSSOP, it supports digital supply voltages from 4.75 V to 5.25 V. Key performance metrics include a differential nonlinearity (DNL) and integral nonlinearity (INL) of ±2 LSB, a signal-to-noise and distortion ratio (SINAD) of 71 dB, and a typical power consumption of 1.6 mW at full speed.

Analog To Digital Converters (ADC) Feature Summary

• MicroPower operation enabling low energy consumption suitable for battery-powered applications
• High-speed 200 kSPS sampling capability within a compact surface-mount package
• Flexible input configuration supporting both pseudo-differential and single-ended signals
• Standard 3-wire serial interface ensuring compatibility with common microprocessor systems

Analog To Digital Converters (ADC) Applications

• Portable instrumentation requiring low power and moderate resolution
• Battery-operated data acquisition systems
• Industrial process control monitoring
• Medical equipment signal conditioning

Analog To Digital Converters (ADC) Procurement Notes

Verify the presence of the G4 suffix, which indicates lead-free status and RoHS compliance, against specific project requirements. Confirm the E variant designation corresponds to the commercial temperature range (-40°C to +85°C). Ensure the /2K5 tape-and-reel packaging format aligns with automated assembly capabilities. Cross-reference the manufacturer part number directly with official Texas Instruments documentation to validate authenticity and current production status before procurement.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a balance between speed and power efficiency is required for 12-bit conversion tasks. The external reference requirement allows for optimization of accuracy based on system noise constraints. Consider the VSSOP-8 package dimensions for PCB layout space limitations. Verify that the host processor supports the specific 3-wire serial timing requirements. Evaluate if the ±2 LSB linearity meets the application's precision needs compared to higher-resolution alternatives.

Analog To Digital Converters (ADC) Part Context

This device belongs to the ADS7822 family of micro-power ADCs from Texas Instruments. It shares architectural similarities with other members like the ADS7822EB and ADS7822U, differing primarily in package type and reel quantity specifications. The family is designed for applications demanding low power consumption without sacrificing significant sampling speed. It serves as a cost-effective solution for general-purpose analog-to-digital conversion tasks in embedded systems.

Analog To Digital Converters (ADC) Replacement Considerations

ADS7822EC/2K5G4 offers identical electrical characteristics but uses a VSSOP-8 package instead of the potentially different footprint implied by other variants. ADS7822U provides similar performance in a SOIC-8 package. Verify pinout compatibility and thermal characteristics when substituting. Check datasheet revisions for any minor parameter updates between generations.