ADS7844N/1K

Analog To Digital Converters (ADC) Overview

The ADS7844N/1K is a 12-bit, 8-channel successive approximation register (SAR) analog-to-digital converter manufactured by Texas Instruments. It features a serial peripheral interface (SPI) 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. Analog supply voltage operates between 2.7 V and 5.25 V, while the digital supply ranges from 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. Typical power consumption is 1.8 mW, with maximum power dissipation at 4.5 mW. It is housed in a 20-pin SSOP package and operates within a temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Integrates an onboard multiplexer for efficient multi-channel data acquisition
• Supports flexible input configurations including pseudo-differential and single-ended modes
• Enables low-power operation suitable for battery-driven applications
• Provides high linearity accuracy with guaranteed no missing codes

Analog To Digital Converters (ADC) Applications

• Portable multichannel data loggers
• Personal digital assistants and handheld devices
• Industrial process control systems
• Measurement equipment requiring moderate speed and resolution

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix '1K' indicates reel packaging containing 1000 units as per distributor specifications. Confirm RoHS compliance status through official documentation. Ensure the SSOP-20 package matches the target PCB footprint. Validate that the operating voltage requirements align with the system's analog and digital rails before integration.

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 independent analog and digital supplies to reduce noise. Consider alternatives if higher resolution or faster throughput is necessary. Verify that the external reference voltage capability meets the application's precision requirements.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADS7844 family of SAR ADCs. It shares pin compatibility with other variants like the ADS7844EG4 but differs in package type and quantity. The 'N' suffix typically denotes the SSOP package, while '/1K' specifies the tape and reel quantity. It serves as a mid-range solution balancing speed, channel count, and power efficiency.

Analog To Digital Converters (ADC) Replacement Considerations

ADS7844EG4 offers identical electrical performance in a QSOP-20 package. ADS7844EB provides similar functionality in a different variant. Verify pinout and thermal characteristics when substituting packages. Ensure software drivers remain compatible with the SPI interface timing.