ADS574JP

Analog To Digital Converters (ADC) Overview

The ADS574JP is a 12-bit successive approximation analog-to-digital converter manufactured by Texas Instruments (originally Burr-Brown). It utilizes low-power CMOS technology with an internal capacitor array (CDAC) and operates on a single +5V supply. The device integrates a sampling function, clock, microprocessor interface, and three-state outputs. Key electrical parameters include a maximum throughput time of 25 μs for 12-bit conversions at 40 kHz, a typical signal-to-noise ratio of 72 dB, and a spurious-free dynamic range of 78 dB. It supports unipolar (0 to +10V, 0 to +20V) and bipolar (±5V, ±10V) input ranges.

Analog To Digital Converters (ADC) Feature Summary

• Complete 12-bit ADC with internal sampling, reference, and microprocessor interface
• Single +5V supply operation with low power consumption (max 100mW)
• Eliminates external sample/hold amplifiers in most applications via internal S/H
• Three-state digital outputs compatible with TTL/CMOS logic levels

Analog To Digital Converters (ADC) Applications

• Data acquisition systems requiring drop-in replacement for ADC574
• Microprocessor-based instrumentation with direct bus interfacing
• Industrial control systems utilizing single-supply operation
• Signal processing circuits where external sample/hold components are undesirable

Analog To Digital Converters (ADC) Procurement Notes

Verify the package type corresponds to the 0.6-inch Plastic DIP (PDIP-28) specified by the 'JP' suffix. Confirm that the application design accounts for the optional VEE pin (Pin 11) configuration, which determines the sampling mode (Control vs. Emulation). Ensure power supply decoupling includes a 10 μF tantalum capacitor on the +5V line as per datasheet recommendations.

Analog To Digital Converters (ADC) Selection Notes

Select the ADS574JP when a 12-bit resolution and 40 kHz sampling rate are required within a single +5V supply constraint. Choose this component over the standard ADC574 if lower power dissipation and elimination of external sample/hold circuitry are priorities. Ensure the input voltage range matches the internal scaling resistors (0 to +10V, 0 to +20V, ±5V, or ±10V) without exceeding absolute maximum ratings.

Analog To Digital Converters (ADC) Part Context

The ADS574 series serves as a modernized successor to the legacy ADC574, offering improved power efficiency and integrated functionality. The 'JP' designation specifically identifies the 0.6-inch wide 28-pin plastic DIP package variant within the ADS574 family, distinct from the 0.3-inch DIP ('JE') or SOIC ('JU') packages.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS574 is documented as a drop-in replacement for the ADC574 in most applications. When substituting, ensure Pin 11 (VEE) is connected appropriately: to +5V for Control Mode or to 0V/-15V for ADC574 Emulation Mode. Verify that existing system timing constraints accommodate the ADS574's specific aperture delay and conversion times.