ADS7828E/250G4

Analog To Digital Converters (ADC) Overview

The ADS7828E/250G4 is a 12-bit successive approximation register (SAR) analog-to-digital converter featuring an I2C interface and an internal multiplexer. It supports eight single-ended or four differential input channels with a sampling rate of 50 kSPS. The device operates on a single supply voltage ranging from 2.7 V to 5.25 V for both analog and digital domains. Key performance metrics include a signal-to-noise ratio of 72 dB, differential nonlinearity of ±1 LSB, and integral nonlinearity of ±2 LSB. Power consumption is specified at 675 µW during operation and less than 1 µW in shutdown mode. It is housed in a 16-pin TSSOP package and functions within a temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Integrates an 8-channel analog multiplexer with a 12-bit SAR ADC core for efficient multi-point data acquisition.
• Utilizes a standard I2C serial interface supporting up to 400 kHz clock frequency for simplified system connectivity.
• Includes an internal reference voltage source to reduce external component count and board space requirements.
• Offers flexible power management with programmable shutdown modes achieving ultra-low standby current.

Analog To Digital Converters (ADC) Applications

• Portable battery-powered instrumentation requiring low power consumption.
• Industrial process control systems utilizing I2C communication buses.
• Data acquisition modules for environmental monitoring sensors.
• Medical equipment with constraints on size and power usage.

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix G4 indicates RoHS compliance and lead-free status as per Texas Instruments standards. Confirm the /250 designation corresponds to the 50 kSPS sampling speed variant. Ensure the TSSOP-16 package matches the target PCB footprint. Cross-reference the manufacturer part number against official TI documentation to validate authenticity and revision level before procurement.

Analog To Digital Converters (ADC) Selection Notes

Select this component when an 8-channel input is required without external multiplexers. The I2C interface is suitable for microcontrollers with limited GPIO pins. Verify that the 50 kSPS speed meets application bandwidth needs. Check if the internal reference accuracy suffices; otherwise, consider external reference options available in other variants. Ensure supply voltage ranges align with the system's 2.7 V to 5.25 V capability.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADS782x family of micro-power ADCs from Texas Instruments. It shares architectural similarities with the ADS7823 and ADS7825 but differs in channel count and interface type. The ADS7828 specifically targets applications needing multiple inputs with serial communication. It complements higher-speed parallel ADCs like the ADS7852 by offering lower power and simpler interfacing for slower data rates.

Analog To Digital Converters (ADC) Replacement Considerations

ADS7828E/250: Identical functional specifications with potential packaging or reel variations. ADS7828E/1K5: Same device characteristics with different tape-and-reel quantity. ADS7828EVM: Evaluation module for testing, not a direct replacement. No cross-family substitutes are confirmed in public documentation.