ADS7842E

Analog To Digital Converters (ADC) Overview

The ADS7842E is a 12-bit, 4-channel analog-to-digital converter (ADC) utilizing successive approximation register (SAR) architecture. It features parallel output sampling at rates up to 200 kS/s with single-ended inputs. The device operates on a single supply voltage ranging from 2.7 V to 5.25 V for both analog and digital domains. Key performance metrics include a signal-to-noise ratio (SNR) of 72 dB, differential nonlinearity (DNL) of ±0.8 LSB, and integral nonlinearity (INL) of ±2 LSB. Power consumption is specified at 1.8 mW under typical operating conditions. It is housed in an SSOP-28 package and supports an external reference voltage.

Analog To Digital Converters (ADC) Feature Summary

• Integrates a 4-channel multiplexer with a sample-and-hold amplifier for efficient multi-point data acquisition.
• Provides parallel 3-state digital outputs for direct microprocessor interface without additional latching hardware.
• Supports low-power operation suitable for battery-supplied portable instrumentation systems.

Analog To Digital Converters (ADC) Applications

• Portable multichannel data loggers
• Industrial process control monitoring
• Battery-powered measurement equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify component authenticity through authorized distribution channels due to the presence of counterfeits in the market. Confirm RoHS compliance status as indicated in the specific datasheet revision. Check for moisture sensitivity level requirements during storage and handling to prevent package damage. Ensure the ordering suffix matches the required packaging format, such as tube or reel configurations available for this part number.

Analog To Digital Converters (ADC) Selection Notes

Select the ADS7842E when parallel interface speed is prioritized over serial pin count reduction. Compare DNL and INL specifications against system accuracy requirements, noting that the E-grade variant offers ±0.8 LSB DNL and ±2 LSB INL. Verify that the input signal range aligns with the external reference voltage capabilities. Consider power dissipation limits if operating near the maximum temperature extremes defined in the electrical characteristics table.

Analog To Digital Converters (ADC) Part Context

This component belongs to the Texas Instruments ADS7842 family of high-speed, low-power ADCs. It shares architectural similarities with the ADS7841 but differs in its parallel output interface compared to the serial SPI interface found in other series members like the ADS7846. The device is designed to bridge the gap between high-speed conversion and low power consumption in compact form factors.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS7842EB serves as a tube-packaged alternative to the reel-based ADS7842E/1K. Both variants share identical electrical specifications and functionality. Verify package compatibility and reflow soldering profiles before substitution. No functional differences exist between the E and EB suffixes regarding performance parameters.