LTC1404CS8#PBF

Analog To Digital Converters (ADC) Overview

The LTC1404CS8#PBF is a complete 12-bit, 600ksps sampling A/D converter in an SO-8 package. It operates from a single 5V supply or ±5V supplies, drawing 75mW at full speed. The device features a 160ns sample-and-hold and an internal 2.43V reference. It supports unipolar (0V to 4.096V) and bipolar (±2.048V) input ranges with guaranteed no missing codes. Key specifications include ±1LSB INL/DNL, 72dB S/(N+D), and –80dB THD at Nyquist. Power management includes Nap mode (7.5mW) and Sleep mode (60µW).

Analog To Digital Converters (ADC) Feature Summary

• Complete 12-bit ADC with 600ksps sampling rate in SO-8 package.
• Single 5V or ±5V operation with 75mW typical power dissipation.
• Internal 2.43V reference with external overdrive capability.
• Nap mode (7.5mW) and Sleep mode (60µW) for power saving.

Analog To Digital Converters (ADC) Applications

• High-speed data acquisition systems.
• Digital signal processing applications.
• Multiplexed data acquisition systems.
• Audio and telecom processing.
• Low power and battery-operated instruments.

Analog To Digital Converters (ADC) Procurement Notes

Verify the suffix #PBF indicates lead-free compliance. Confirm the CS8 variant specifies the commercial temperature range of 0°C to 70°C. Ensure the ordering code matches the required package style and pin configuration for the target PCB design.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring high throughput up to 600ksps with minimal external components. Choose the IS8 variant if operation below 0°C is required. Consider the internal reference limitations when higher precision or wider input spans are needed compared to external references.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1404 family of monolithic sampling ADCs. The CS8 designation identifies the commercial grade version housed in an 8-lead plastic SOIC package. It serves as a compact solution for replacing discrete ADC designs in space-constrained electronics.

Analog To Digital Converters (ADC) Replacement Considerations

Direct replacements within the same family include the LTC1404IS8#PBF for extended temperature ranges. Verify pin compatibility and electrical specifications against legacy parts before substitution.

Analog To Digital Converters (ADC) FAQ

How does the LTC1404 determine between unipolar and bipolar modes?

The device automatically detects the mode based on the VSS pin potential. If VSS is tied to GND, it operates in unipolar mode. If VSS is connected to a negative supply (e.g., -5V), it switches to bipolar mode.

What is the wake-up time from Sleep mode?

Upon waking from Sleep mode, the device requires approximately 2.5ms for the internal reference to settle. The REFREADY bit in the serial data word indicates when the chip is ready to convert.

Can the internal reference be used externally?

Yes, the 2.43V internal reference is available at Pin 3 (VREF). It can drive external loads up to 1mA or be overdriven by an external source to adjust input span, provided the voltage stays between 2.43V and 5V.