ADS774KU/1KE4

Analog To Digital Converters (ADC) Overview

The ADS774KU/1KE4 is a 12-bit successive approximation analog-to-digital converter manufactured by Texas Instruments. It operates from a single +5V supply and features an internal clock, microprocessor interface, and three-state outputs. The device includes internal scaling resistors for input ranges of 0V to +10V, 0V to +20V, ±5V, or ±10V. It provides a maximum throughput time of 8.5 μs over the full operating temperature range (-40°C to +85°C). Key electrical specifications include a sampling rate of 125 kHz at 25°C, a signal-to-noise ratio (SNR) of 72 dB, and a power dissipation of 120 mW maximum. The component is housed in a 28-lead SOIC package.

Analog To Digital Converters (ADC) Feature Summary

• Complete sampling A/D converter with integrated reference, clock, and microprocessor interface
• Internal sample/hold function eliminates external sample/hold amplifiers in most applications
• Microprocessor-compatible parallel data output with three-state buffers
• Drop-in replacement for legacy ADC574, ADC674, and ADC774 models

Analog To Digital Converters (ADC) Applications

• Microprocessor-based data acquisition systems
• Industrial process control instrumentation
• Medical equipment requiring precise analog signal digitization
• Test and measurement devices

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature grade. Ensure that the E4 suffix aligns with lead-free compliance requirements for your assembly process. Cross-reference the datasheet revision date to confirm pinout compatibility with existing PCB footprints before finalizing procurement orders.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a drop-in replacement for older Burr-Brown converters is required without changing system software. Choose the KU variant for surface-mount assembly needs. Consider the Control Mode versus Emulation Mode based on whether external sample/hold circuits are present in the design. Verify that the 12-bit resolution and 125 kHz sampling rate meet the bandwidth requirements of the target application.

Analog To Digital Converters (ADC) Part Context

The ADS774 series represents a transition from bipolar to CMOS technology while maintaining compatibility with established industrial standards. This specific part belongs to the high-performance subset of the family, offering improved linearity compared to the JE/JU variants. It serves as a bridge component for designs migrating from legacy architectures to modern low-power CMOS implementations.

Analog To Digital Converters (ADC) Replacement Considerations

ADS774KU

Analog To Digital Converters (ADC) FAQ

How does the ADS774KU/1KE4 handle input voltage ranges?

The device includes internal laser-trimmed scaling resistors that allow it to accept standard input ranges of 0V to +10V, 0V to +20V, ±5V, or ±10V directly without external attenuation circuitry.

What is the difference between Control Mode and Emulation Mode?

Control Mode minimizes aperture jitter and allows the input to slew during acquisition, suitable for new designs. Emulation Mode introduces a delay to mimic the behavior of the ADC774, allowing it to replace legacy parts in existing sockets without hardware changes.

Is the VEE pin required for operation?

No, the VEE pin is optional. It is used primarily to select the sampling mode (Control or Emulation) via logic levels rather than requiring a negative supply voltage for core functionality.