ADS7844NB/1KG4

Analog To Digital Converters (ADC) Overview

The ADS7844NB/1KG4 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 pseudo-differential or single-ended input types. The device operates with an analog supply voltage range of 2.7 V to 5.25 V and a digital supply voltage range of 1.9 V to 5.5 V. It achieves a maximum sampling rate of 200 kS/s with a typical power consumption of 1.8 mW. Key performance metrics include a Signal-to-Noise and Distortion Ratio (SINAD) of 72 dB, integral nonlinearity (INL) of ±1 LSB, and differential nonlinearity (DNL) of ±1 LSB. It 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-channel multiplexed input capability supporting both pseudo-differential and single-ended configurations for versatile signal acquisition.
• Low-power SAR architecture enabling efficient operation in battery-powered systems with minimal energy dissipation during conversion cycles.
• Flexible external reference voltage input allowing adaptation to various system requirements and signal ranges.

Analog To Digital Converters (ADC) Applications

• Portable multichannel data loggers requiring low power consumption and multiple input channels.
• Personal digital assistants and handheld devices needing high-resolution signal digitization.
• Industrial measurement equipment utilizing serial interfaces for microcontroller integration.

Analog To Digital Converters (ADC) Procurement Notes

Verify the component marking on the physical device against the datasheet specifications. Official documentation indicates that the 'B' suffix may be omitted from the top marking despite being part of the ordering part number. Confirm the presence of the 'G4' suffix to ensure lead-free compliance and specific packaging configuration as defined by the manufacturer's current production standards.

Analog To Digital Converters (ADC) Selection Notes

Select this component when designing systems requiring eight analog inputs with 12-bit resolution and moderate speed up to 200 kSPS. Ensure the host processor supports the synchronous serial interface protocol. Verify that the available supply voltages align with the specified analog and digital ranges. Consider the thermal characteristics if operating near the upper temperature limits in enclosed environments.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADS7844 family of 12-bit ADCs. It shares pin compatibility and functional similarities with other members like the ADS7844N and ADS7844EBG4. The primary distinctions involve manufacturing revisions, packaging variations, and compliance certifications. It serves as a standard solution for general-purpose multi-channel data acquisition tasks in mixed-signal applications.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS7844N is documented as a compatible replacement variant. Verify that the substitute part meets the same electrical specifications and package dimensions. Confirm that any differences in marking conventions do not impact assembly identification processes.