ADS574JEG4

Analog To Digital Converters (ADC) Overview

The ADS574JEG4 is a 12-bit successive approximation analog-to-digital converter (ADC) manufactured by Texas Instruments. It integrates a sampling function, internal clock, microprocessor interface, and reference circuitry into a single device. The component operates on a single +5V supply with optional VEE for mode selection. Key electrical parameters include a maximum conversion time of 25 μs, a sampling rate of 40 kHz, and a typical Signal-to-Noise Ratio (SNR) of 72 dB. It features three-state digital outputs and supports input voltage ranges of 0 to +10V, 0 to +20V, ±5V, or ±10V.

Analog To Digital Converters (ADC) Feature Summary

• Integrated 12-bit SAR ADC with internal sample/hold, eliminating the need for external sample/hold amplifiers in most applications.
• Single +5V power supply operation with low power consumption of 100 mW maximum.
• Microprocessor-compatible interface with TTL/CMOS logic levels and three-state data outputs.
• Internal scaling resistors support unipolar (0-10V, 0-20V) and bipolar (±5V, ±10V) input ranges.

Analog To Digital Converters (ADC) Applications

• Data acquisition systems requiring drop-in replacement for legacy ADC574 designs.
• Industrial process control and monitoring where single-supply operation is required.
• Microprocessor-based measurement systems utilizing standard parallel bus interfaces.
• Battery-powered instrumentation benefiting from low power dissipation.

Analog To Digital Converters (ADC) Procurement Notes

Verify the package type corresponding to the JE suffix (0.3-inch Plastic DIP). Confirm that the design utilizes the S/H Control Mode (Pin 11 connected to +5V) or Emulation Mode (Pin 11 connected to ground/negative voltage) as intended, since Pin 11 functions as a mode control input rather than a standard negative supply rail in many configurations.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 12-bit resolution and 40 kHz throughput are sufficient for the application. Ensure the analog input signal falls within the supported ranges (0-10V, 0-20V, ±5V, ±10V) due to internal scaling resistors. Consider the thermal resistance of 100°C/W for the plastic DIP package if operating near the upper temperature limits.

Analog To Digital Converters (ADC) Part Context

The ADS574 series serves as a direct replacement for the Burr-Brown ADC574. The 'JE' suffix denotes the 0.3-inch wide Plastic DIP package variant. The 'G4' suffix indicates compliance with specific environmental standards, typically RoHS, though the primary datasheet focuses on the functional ADS574 specifications.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS574 is explicitly designed to replace the ADC574. When substituting, ensure Pin 11 (VEE) is configured correctly for the desired sampling mode (Control vs. Emulation), as this pin determines the behavior of the internal sample/hold relative to the convert command.