ADS7844E/2K5G4

Analog To Digital Converters (ADC) Overview

The ADS7844E/2K5G4 is a 12-bit, 8-channel serial output sampling analog-to-digital converter manufactured by Texas Instruments. It utilizes a successive approximation register (SAR) architecture to achieve a maximum sampling rate of 200 kS/s. The device supports pseudo-differential and single-ended input types with an external reference configuration. It operates on an analog supply voltage ranging from 2.7 V to 5.25 V and a digital supply voltage from 1.9 V to 5.5 V. Key performance metrics include a differential nonlinearity (DNL) of +/- 0.8 LSB, integral nonlinearity (INL) of +/- 2 LSB, and a signal-to-noise and distortion ratio (SINAD) of 72 dB. Typical power consumption is 1.8 mW, with a maximum power dissipation of 4.5 mW. The component is housed in a 20-pin SSOP package and functions within a temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Eight multiplexed analog input channels supporting both pseudo-differential and single-ended configurations for flexible signal acquisition.
• Serial peripheral interface (SPI) compatible communication protocol simplifies integration with microprocessors and digital controllers.
• Low-power SAR architecture enables efficient operation with minimal energy consumption suitable for battery-powered applications.
• High linearity performance ensures accurate data conversion with specified limits on differential and integral nonlinearity errors.

Analog To Digital Converters (ADC) Applications

• Portable instrumentation requiring high-resolution multi-channel data acquisition
• Industrial process control systems monitoring multiple sensor inputs
• Medical equipment needing precise analog signal digitization

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix matches the required package type and tape-and-reel quantity. Confirm RoHS compliance status as indicated by the G4 suffix. Ensure the supplier provides valid traceability documentation for the Texas Instruments manufacturing origin. Check that the component meets the specified operating temperature range for your intended environment. Validate pin compatibility if replacing existing inventory in established designs.

Analog To Digital Converters (ADC) Selection Notes

Select this component when eight simultaneous or multiplexed analog channels are required with 12-bit resolution. Consider the 200 kS/s sampling rate against system bandwidth requirements. Evaluate the external reference requirement against available board space and cost constraints. Compare power consumption specifications against battery life expectations for portable devices. Verify SPI interface compatibility with the host processor's available communication ports.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADS7844 family of analog-to-digital converters produced by Texas Instruments. The series is designed for general-purpose data acquisition applications requiring moderate speed and high accuracy. The E/2K5G4 designation indicates a specific package variant and packaging format within the broader product line. Related components in the family may offer different channel counts or sampling rates while maintaining similar architectural features.

Analog To Digital Converters (ADC) Replacement Considerations

ADS7844EG4 serves as a direct equivalent with identical electrical specifications and pinout. ADS7844EBG4 offers the same functionality in a different SSOP package variant. ADS7844N/1K provides comparable performance in a reel-packaged format. Verify pin compatibility and software driver support before substituting any alternative part numbers.