ADS7842E/1KG4

Analog To Digital Converters (ADC) Overview

The ADS7842E/1KG4 is a 12-bit, 4-channel analog-to-digital converter (ADC) manufactured by Texas Instruments. It utilizes a successive approximation register (SAR) architecture with parallel output sampling capabilities. The device operates on a single supply voltage ranging from 2.7 V to 5.25 V for both analog and digital domains. Key electrical specifications include a maximum sampling rate of 200 kS/s, a signal-to-noise ratio (SNR) of 72 dB, and differential nonlinearity (DNL) of ±0.8 LSB. It features single-ended inputs and an external reference type. The component is housed in a 28-pin SSOP package and supports operating temperatures between -40°C and +85°C.

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 high-speed parallel data output compatible with standard microprocessor interfaces.
• Designed for low-power operation suitable for battery-supplied portable instrumentation systems.

Analog To Digital Converters (ADC) Applications

• Portable multichannel data loggers
• Industrial process control monitoring
• Medical instrumentation devices

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'G4' against the manufacturer's current datasheet to confirm RoHS compliance status and pinout compatibility. Confirm availability as the base ADS7842 series may have end-of-life implications. Ensure the reel packaging matches the required quantity for production needs.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 12-bit resolution and parallel interface are required for four single-ended channels. Compare DNL and INL specifications against system accuracy requirements. Verify that the 200 kS/s sampling rate meets the bandwidth needs of the application signals.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADS7842 family of 12-bit ADCs. It differs from the ADS7841, which offers serial SPI output, and the ADS7844, which provides eight channels. The 'G4' suffix typically indicates lead-free and RoHS-compliant manufacturing variations within the same functional specification.

Analog To Digital Converters (ADC) Replacement Considerations

• ADS7842E
• ADS7842EB

Analog To Digital Converters (ADC) FAQ

What is the input configuration of the ADS7842E/1KG4?

The device supports four single-ended analog input channels.

Does the ADS7842E/1KG4 require an internal or external reference?

It requires an external reference voltage connected to the REF+ and REF- pins.

What is the maximum clock frequency for this ADC?

The device supports a maximum sampling rate of 200 kS/s, requiring a corresponding clock frequency determined by the conversion cycle.