ADS7844NB/1K

Analog To Digital Converters (ADC) Overview

The ADS7844NB/1K 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 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 accepts pseudo-differential or single-ended inputs and utilizes an external reference. 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. 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 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 typical power dissipation of 1.8 mW.
• High linearity performance with ±1 LSB INL and DNL specifications ensuring accurate data conversion without missing codes.

Analog To Digital Converters (ADC) Applications

• Portable multichannel data loggers requiring low power and multiple input channels.
• Personal digital assistants and handheld devices utilizing battery-operated architectures.
• Industrial monitoring systems needing precise analog signal digitization.

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix '1K' against current manufacturer documentation to confirm packaging configuration, as standard datasheets may list generic package types like tube or reel. Ensure compatibility with required humidity sensitivity levels and moisture management protocols during storage and handling. Cross-reference the part number with official distributor catalogs to validate availability and exact physical dimensions for PCB layout integration.

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. It is suitable for applications where power efficiency is critical, such as portable instrumentation. Verify that the system's microcontroller supports the synchronous serial interface protocol. Ensure the external reference voltage meets the required accuracy standards to maintain the specified linearity performance across the operating temperature range.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADS7844 family of high-speed, low-power ADCs from Texas Instruments. The 'NB' designation typically indicates a specific package variant, while '/1K' denotes the reel quantity. It shares architectural similarities with other members of the series but is distinguished by its eight-channel configuration and specific pinout in the SSOP-20 package. It serves as a solution for multi-channel data acquisition in space-constrained designs.

Analog To Digital Converters (ADC) Replacement Considerations

ADS7844N is a documented equivalent part number. Official support confirms that marking standardization may result in ADS7844N labels on ADS7844NB devices, indicating functional interchangeability. Verify pin compatibility and electrical specifications before substitution to ensure design continuity.