ADS7841ESG4

Analog To Digital Converters (ADC) Overview

The ADS7841ESG4 is a 12-bit, 4-channel sampling Analog-to-Digital Converter (ADC) manufactured by Texas Instruments. It features a Successive Approximation Register (SAR) architecture with a synchronous serial interface compatible with SPI protocols. The device operates on a single supply voltage ranging from 2.7V to 5.25V and supports a maximum throughput rate of 200kHz. It offers ±1LSB maximum Integral Nonlinearity (INL) and Differential Nonlinearity (DNL) without missing codes. The ES grade variant is specified for an extended operating temperature range of –40°C to +125°C.

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.
• Flexible resolution programmable between 8 bits and 12 bits via digital control.
• On-board sample-and-hold function utilizing capacitive redistribution architecture.

Analog To Digital Converters (ADC) Applications

• Battery-operated portable systems
• Personal digital assistants
• Portable multi-channel data loggers
• Industrial process control measurement equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and temperature grade. Ensure the component matches the required electrical specifications for the target application environment before integration.

Analog To Digital Converters (ADC) Selection Notes

Select this model when high accuracy within the SAR class is required alongside low power operation. The ES grade is necessary for applications requiring reliable performance at elevated temperatures up to 125°C. Consider the external reference requirements and serial interface timing constraints during system design.

Analog To Digital Converters (ADC) Part Context

This component belongs to the ADS7841 family of 12-bit ADCs. It serves as a pin-compatible alternative to other industry-standard converters like the MAX1247. The device is designed for cost-sensitive, space-constrained embedded data acquisition systems.

Analog To Digital Converters (ADC) Replacement Considerations

The datasheet identifies the MAX1247 as a direct alternate source. Verify pin compatibility and electrical parameter alignment before substitution.

Analog To Digital Converters (ADC) FAQ

What is the input voltage range relative to the reference?

The analog input range is determined by the external reference voltage (VREF), which can vary from 100mV to VCC. In single-ended mode, the input spans from 0V to VREF.

How does the device handle power-down states?

The ADS7841 supports auto power-down between conversions and a deep shutdown mode activated by pulling the SHDN pin low, which reduces power dissipation to under 15µW.

Is the conversion result available immediately after the control byte?

No. After the 8-bit control byte is received, the device requires additional clock cycles for acquisition and conversion before data appears on the DOUT pin.