ADS7824U

Analog To Digital Converters (ADC) Overview

The ADS7824U is a 12-bit analog-to-digital converter (ADC) manufactured by Texas Instruments, housed in a 28-pin SOIC package. It features four single-ended input channels and supports both parallel and SPI serial interfaces. The device utilizes a successive approximation register (SAR) architecture with an internal reference. It operates on a single 5V supply, accepting analog input voltages between -10 V and +10 V. Key electrical specifications include a maximum sampling rate of 40 kS/s, a conversion time of 21 µs, and a power dissipation of 50 mW. Performance metrics specify a signal-to-noise ratio (SNR) of 73 dB, with differential and integral nonlinearity errors limited to ±1 LSB.

Analog To Digital Converters (ADC) Feature Summary

• Integrated internal voltage reference eliminates the need for external components.
• Flexible interface options support both high-speed parallel data transfer and standard SPI communication.
• Wide single-supply operation simplifies power design for industrial applications.

Analog To Digital Converters (ADC) Applications

• Industrial process control systems requiring multi-channel data acquisition
• Portable instrumentation utilizing single-supply architectures
• Data logging equipment with moderate speed requirements

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'U' confirms the SOIC-28 surface-mount package variant. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor certificates prior to procurement. Ensure the ordering part number matches the required temperature range and interface configuration exactly.

Analog To Digital Converters (ADC) Selection Notes

Select this component when four independent single-ended inputs are required within a compact surface-mount footprint. The SAR architecture offers a balance between resolution and speed suitable for general-purpose monitoring. Verify that the 40 kS/s sampling rate meets system bandwidth requirements and that the 5V supply aligns with available power rails.

Analog To Digital Converters (ADC) Part Context

This device belongs to the ADS7824 family of low-power, 12-bit ADCs from Texas Instruments. The family includes variants such as the ADS7824PG4 in a DIP package. These converters are designed for applications needing multiple channels without complex multiplexing overhead, providing a cost-effective solution for mid-range precision data acquisition tasks.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS7824PG4 serves as a pin-compatible alternative offering the same functional specifications in a PDIP-28 package. Designers requiring through-hole mounting may substitute the U variant with the PG4 version without altering circuit layout or software drivers.

Analog To Digital Converters (ADC) FAQ

What is the maximum allowable analog input voltage range?

The ADS7824U accepts single-ended analog input signals ranging from -10 V to +10 V.

Does the device require an external voltage reference?

No, the ADS7824U includes an internal voltage reference, reducing the component count in the application circuit.

How does the device handle data output timing?

The device provides a conversion complete flag and supports data output via either a parallel bus or a serial SPI interface, allowing flexible integration with various microcontrollers.