LTC1409CG#TRPBF

Analog To Digital Converters (ADC) Overview

The LTC1409CG#TRPBF is a 12-bit, 800ksps sampling analog-to-digital converter (ADC) from Analog Devices. It operates on ±5V supplies with a power dissipation of 80mW. The device features a high dynamic range sample-and-hold circuit and an internal precision reference. Key electrical specifications include a full-scale input range of ±2.5V, 72.5dB S/(N + D) at the Nyquist frequency, and no pipeline delay. It offers two digitally selectable shutdown modes: Nap (4mW) and Sleep (10μW). The ADC provides a μP-compatible 12-bit parallel output port with a separate data ready signal.

Analog To Digital Converters (ADC) Feature Summary

• 12-Bit Resolution with 800ksps Sampling Rate
• Low Power Consumption: 80mW Active, 4mW Nap Mode, 10μW Sleep Mode
• Internal Precision Reference with 15ppm/°C Temperature Coefficient
• True Differential Inputs with 60dB Common Mode Rejection

Analog To Digital Converters (ADC) Applications

• Telecommunications
• Digital Signal Processing
• Multiplexed Data Acquisition Systems
• High Speed Data Acquisition
• Spectrum Analysis

Analog To Digital Converters (ADC) Procurement Notes

Verify the package type matches the required design footprint; the CG suffix indicates a 28-lead plastic SO package. Confirm the temperature grade corresponds to the application environment, as the C suffix denotes commercial operation (0°C to 70°C). Ensure the ordering suffix #TRPBF aligns with the specific reel or tape configuration requirements for automated assembly processes.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 12-bit resolution and 800ksps throughput are sufficient for the target application. Consider the internal reference if external precision references are not desired, noting its 15ppm/°C stability. Evaluate the power constraints carefully; if ultra-low power is critical during idle periods, utilize the Nap or Sleep shutdown modes. Ensure the driving circuit can settle within the 150ns acquisition time for optimal performance.

Analog To Digital Converters (ADC) Part Context

The LTC1409 belongs to a family of successive approximation register (SAR) ADCs designed for general-purpose data acquisition. It distinguishes itself through a differential input architecture that rejects common-mode noise and eliminates ground loops. The device integrates a sample-and-hold and reference, reducing external component count compared to discrete solutions.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC1419 is a pin-compatible alternative offering 14-bit resolution at the same 800ksps rate. For lower speed requirements, the LTC1278 (500ksps) and LTC1279 (600ksps) provide similar functionality with potentially different power profiles.