ADS7841E/2K5G4

Analog To Digital Converters (ADC) Overview

The ADS7841E/2K5G4 is a 12-bit, 4-channel serial output sampling Analog-to-Digital Converter (ADC) manufactured by Texas Instruments. It operates on a single supply voltage ranging from 2.7V to 5.25V and supports up to 200kHz conversion rates. The device features a Successive Approximation Register (SAR) architecture with an integrated four-channel multiplexer. It offers ±1LSB maximum Integral Nonlinearity (INL) and Differential Nonlinearity (DNL), ensuring no missing codes. The ADC provides a Signal-to-Noise and Distortion Ratio (SINAD) of 72dB and utilizes a synchronous serial interface compatible with standard SPI protocols.

Analog To Digital Converters (ADC) Feature Summary

• Integrated four-channel analog multiplexer supporting both single-ended and differential input configurations
• Low power consumption with dedicated shutdown mode reducing dissipation below 15µW
• High accuracy performance characterized by ±1LSB maximum INL and DNL specifications
• Flexible serial interface allowing for low-cost isolation in remote data acquisition systems

Analog To Digital Converters (ADC) Applications

• Battery-operated personal digital assistants and portable devices
• Portable multi-channel data logging equipment
• Industrial process control measurement systems
• General-purpose data acquisition test and measurement instruments

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix matches the required package type and quantity. The /2K5 designation indicates tape and reel packaging containing 2500 units per reel. Confirm RoHS compliance status and ensure the temperature grade aligns with system requirements before finalizing procurement orders.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a low-power, high-speed 12-bit ADC is required for battery-powered applications. Ensure the external reference voltage falls within the 100mV to VCC range. Verify that the host microcontroller can support the required serial clock speeds and timing constraints for optimal throughput.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADS7841 family of 12-bit SAR ADCs. It is functionally similar to the MAX1247 but serves as an alternate source. The E variant specifies operation over the –40°C to +85°C commercial temperature range, while the ES variant extends this to +125°C. The G4 suffix denotes lead-free and RoHS compliant manufacturing.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX1247 is documented as an alternate source with functional similarity. When substituting, verify pin compatibility and confirm that the replacement device meets the specific temperature range and power dissipation requirements of the original design.

Analog To Digital Converters (ADC) FAQ

How does the reference voltage affect the input range?

The analog input range is directly set by the external reference voltage (VREF). The input span ranges from 0V to VREF, where VREF can be varied between 100mV and VCC.

What is the power consumption in shutdown mode?

When the SHDN pin is driven LOW, the device enters a very low power shutdown mode which reduces power dissipation to under 15µW.

Can the resolution be programmed?

Yes, the resolution is programmable to either 8 bits or 12 bits via the MODE bit in the control byte or the hardware MODE pin configuration.