ADS7842E/1K

Analog To Digital Converters (ADC) Overview

The ADS7842E/1K is a 12-bit, four-channel analog-to-digital converter (ADC) manufactured by Texas Instruments. It utilizes a successive approximation register (SAR) architecture with parallel output sampling at rates up to 200 kS/s. 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 typical and 4.5 mW maximum. It features single-ended inputs, an external reference requirement, and is housed in a 28-pin SSOP package suitable for surface mount installation across a temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Four-channel multiplexed input structure supporting single-ended signals
• Parallel data interface with three-state output drivers for direct microprocessor connection
• Low-power operation optimized for battery-supplied portable systems
• High linearity performance with guaranteed no missing codes

Analog To Digital Converters (ADC) Applications

• Portable multi-channel data acquisition systems
• Industrial process control monitoring
• Battery-powered measurement instruments
• Medical instrumentation requiring low power consumption

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix '1K' indicates reel packaging configuration as per manufacturer standards. Confirm RoHS compliance status through official documentation. Check for end-of-life notifications or obsolescence notices from Texas Instruments prior to final procurement decisions. Ensure external reference voltage components match the required input range specifications.

Analog To Digital Converters (ADC) Selection Notes

Select this component when parallel interface speed is prioritized over serial pin count reduction. Compare against ADS7841 if SPI interface compatibility is required instead of parallel bus. Evaluate power budget constraints against the 1.8 mW typical consumption at full sampling rate. Ensure PCB layout supports high-speed parallel signal integrity for the 12-bit data lines.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADS7842 family of 12-bit SAR ADCs. It differs from the ADS7841 primarily in its parallel output interface versus the ADS7841's serial SPI interface. The 'E' denotes commercial temperature range operation, while '/1K' specifies tape and reel packaging. It serves as a mid-performance solution between high-speed and high-resolution ADC families.

Analog To Digital Converters (ADC) Replacement Considerations

ADS7842EB is the tube-packaged equivalent of the same functional device. ADS7841 offers identical conversion performance but uses a serial SPI interface instead of parallel outputs. Verify pinout compatibility and software interface changes when substituting.