ADS7844EG4

Analog To Digital Converters (ADC) Overview

The ADS7844EG4 is a 12-bit, 8-channel successive approximation register (SAR) analog-to-digital converter manufactured by Texas Instruments. It features a serial output interface and supports sampling rates up to 200 kS/s. The device accepts pseudo-differential or single-ended inputs with an external reference voltage ranging from 100 mV to VCC. It operates on an analog supply of 2.7 V to 5.25 V and a digital supply of 1.9 V to 5.5 V. Key performance metrics include a signal-to-noise and distortion ratio (SINAD) of 72 dB, differential nonlinearity of ±0.8 LSB, and integral nonlinearity of ±2 LSB. Power consumption is typically 1.8 mW. It is housed in a 20-pin QSOP package.

Analog To Digital Converters (ADC) Feature Summary

• Provides high-precision 12-bit resolution across eight multiplexed input channels for versatile data acquisition.
• Supports flexible input configurations including pseudo-differential and single-ended modes with external reference capability.
• Features low power consumption suitable for battery-operated applications while maintaining high-speed sampling capabilities.

Analog To Digital Converters (ADC) Applications

• Portable instrumentation requiring multi-channel signal digitization
• Industrial process control systems with moderate speed requirements
• Data acquisition modules for environmental monitoring

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix EG4 indicates lead-free and RoHS compliance status as per manufacturer documentation. Confirm the QSOP-20 package availability matches design constraints. Ensure external reference voltage specifications align with system requirements before procurement. Check humidity sensitivity handling instructions for storage and reflow processes.

Analog To Digital Converters (ADC) Selection Notes

Select this component when eight channels of 12-bit conversion are required at speeds up to 200 kS/s. It is appropriate for designs needing separate analog and digital supply domains for noise isolation. Consider the external reference requirement if precise voltage referencing is critical. Evaluate the QSOP-20 footprint against available PCB space compared to other package options in the series.

Analog To Digital Converters (ADC) Part Context

The ADS7844EG4 belongs to the ADS7844 family of SAR ADCs from Texas Instruments. This family is designed for general-purpose data acquisition tasks. The EG4 suffix typically denotes environmental compliance and specific packaging variations within the standard ADS7844 product line. It shares core architectural similarities with other members like the ADS7844N but differs in compliance and package type.

Analog To Digital Converters (ADC) Replacement Considerations

ADS7844N is a pin-compatible alternative within the same family. Verify that the package type (QSOP vs SSOP) and compliance standards match the original design intent. Ensure electrical parameters such as supply voltage ranges and sampling rates remain consistent during substitution.