Texas Instruments

ADS7828E

ADS7828E Description

The ADS7828E from Texas Instruments is a 12-bit, 50ksps, 8-channel successive approximation register (SAR) analog-to-digital converter (ADC) designed for precision data acquisition. Housed in a compact 16-pin TSSOP package, it operates with a single 2.5V or 5V supply, making it suitable for low-power embedded systems. The ADC features unipolar voltage inputs, external/internal voltage reference flexibility, and a 72dB signal-to-noise ratio (SNR), ensuring high accuracy in signal conversion. With a ±2LSB integral nonlinearity (INL) and ±4LSB full-scale error, it delivers reliable performance for industrial and instrumentation applications.

ADS7828E Features

• 12-bit resolution with no missing codes, ensuring precise analog-to-digital conversion.
• 8-channel multiplexed input (expandable to 4 channels in differential mode) for versatile signal acquisition.
• Low power consumption: 3.75mW typical (5mW max) at 50ksps, ideal for battery-powered devices.
• SAR architecture with internal sample-and-hold, enabling fast and accurate sampling.
• Flexible reference options: Supports external or internal 2.5V/5V references for system adaptability.
• Wide operating temperature range (-40°C to +85°C), suitable for harsh environments.
• Compact TSSOP-16 package (5.1mm x 4.5mm x 1.05mm), optimizing PCB space in dense designs.

ADS7828E Applications

The ADS7828E excels in applications requiring multi-channel, medium-speed, high-resolution ADCs, such as:

• Industrial automation: Process control, sensor interfacing, and data logging.
• Medical instrumentation: Portable monitoring devices with low-power requirements.
• Test and measurement equipment: Multi-channel signal acquisition systems.
• Embedded systems: Microcontroller-based designs needing reliable analog front-ends.
• Automotive diagnostics (non-automotive grade): Engine monitoring and telemetry.

Conclusion of ADS7828E

The ADS7828E stands out for its 12-bit precision, low power consumption, and multi-channel flexibility, making it a robust choice for cost-sensitive, space-constrained applications. While now obsolete, its legacy performance in SAR-based data acquisition remains relevant for legacy designs or replacements. Engineers seeking high SNR, low INL, and configurable reference options will find it a dependable solution for mixed-signal systems. For newer designs, TI’s updated ADC portfolio may offer enhanced features, but the ADS7828E’s balance of speed, accuracy, and power efficiency ensures its continued utility in select applications.