ADS7844N

Analog To Digital Converters (ADC) Overview

The ADS7844N 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 input signals. 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 maximum power dissipation at 4.5 mW. The component is housed in a 20-lead 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 consumption during conversion cycles.
• Serial peripheral interface (SPI) compatibility simplifies digital connection to microcontrollers and data processing units.

Analog To Digital Converters (ADC) Applications

• Portable multichannel data loggers requiring low power and moderate speed.
• Personal digital assistants and handheld measurement equipment.
• Industrial monitoring systems utilizing multiple sensor inputs.

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix when purchasing, as packaging options such as tape-and-reel or cut-tape may vary by distributor. Confirm RoHS compliance status and humidity sensitivity handling requirements prior to storage and assembly. Ensure the SSOP-20 package dimensions match the target PCB footprint design constraints.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring eight analog channels with 12-bit resolution and speeds up to 200 kSPS. It is suitable where external reference voltages are preferred over internal ones. Consider the separate analog and digital supply voltage ranges if level shifting or dual-rail power supplies are part of the system design.

Analog To Digital Converters (ADC) Part Context

The ADS7844N belongs to the ADS7844 family of high-speed, low-power ADCs from Texas Instruments. It shares pinout compatibility with other devices in the series, such as the ADS7841 and ADS834x variants, facilitating design scalability across different channel counts and resolutions within the same product line.

Analog To Digital Converters (ADC) Replacement Considerations

ADS7844EG4

Analog To Digital Converters (ADC) FAQ

What is the maximum sampling rate of the ADS7844N?

The ADS7844N supports a maximum sampling rate of 200 kS/s.

Does the ADS7844N use an internal or external voltage reference?

The ADS7844N requires an external voltage reference.

What is the operating temperature range for the ADS7844N?

The device operates within a temperature range of -40°C to +85°C.