ADS7844NG4

Analog To Digital Converters (ADC) Overview

The ADS7844NG4 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 analog supply voltage range of 2.7 V to 5.25 V and a digital supply range of 1.9 V to 5.5 V. Key performance metrics include a signal-to-noise and distortion ratio (SINAD) of 72 dB, integral nonlinearity (INL) of ±2 LSB, and differential nonlinearity (DNL) of ±0.8 LSB. It operates within a temperature range of -40°C to +85°C and is housed in a 20-pin SSOP package.

Analog To Digital Converters (ADC) Feature Summary

• Eight multiplexed input channels supporting both pseudo-differential and single-ended configurations for flexible signal acquisition.
• Low power consumption architecture enabling operation with typical power dissipation of 1.8 mW at maximum sampling rates.
• High linearity performance with guaranteed no missing codes and low noise characteristics suitable for precision applications.

Analog To Digital Converters (ADC) Applications

• Portable instrumentation requiring high accuracy with battery-powered constraints
• Industrial process control systems needing multi-channel data acquisition
• Medical equipment utilizing precise physiological signal monitoring

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'G4' indicates lead-free compliance and RoHS status when sourcing. Confirm the package type matches the required PCB footprint, as variations exist between tube and reel packaging options. Ensure the operating environment stays within the specified -40°C to +85°C range to maintain rated performance specifications.

Analog To Digital Converters (ADC) Selection Notes

Select this component when eight channels of 12-bit resolution are required at speeds up to 200 kSPS. It is appropriate for designs needing separate analog and digital supply domains to reduce noise coupling. Consider the external reference requirement if higher precision than internal references allows.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADS7844 family of high-speed, low-power ADCs from Texas Instruments. It shares architectural similarities with other members like the ADS7841 but offers eight channels instead of four. The NG4 designation typically denotes a specific tape-and-reel or tube packaging variant with environmental compliance attributes compared to older non-G4 versions.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS7844N may be used as a functional substitute, though marking standardization changes might occur. Verify pin compatibility and electrical specifications against the current datasheet before replacing. Other family members like the ADS7846 offer similar functionality with different channel counts or interfaces.