LTC2247CUH#TRPBF

Analog To Digital Converters (ADC) Overview

The LTC2247CUH#TRPBF is a 14-bit, 40Msps low-power analog-to-digital converter (ADC) from Analog Devices. It operates on a single 3V supply (2.7V to 3.4V) with typical power dissipation of 120mW. The device features a flexible differential or single-ended input range of 1VP-P to 2VP-P and achieves 74.4dB SNR and 90dB SFDR at the Nyquist frequency. It includes an internal reference, clock duty cycle stabilizer, and shutdown/nap modes. Packaged in a 32-lead QFN, it supports offset binary or two's complement output formats.

Analog To Digital Converters (ADC) Feature Summary

• 14-bit resolution with no missing codes over temperature
• 40Msps sampling rate with 575MHz full power bandwidth
• Low power consumption: 120mW typical at 3V supply
• Integrated clock duty cycle stabilizer for wide duty cycle tolerance
• Flexible input range selectable via SENSE pin (±0.5V to ±1V)

Analog To Digital Converters (ADC) Applications

• Wireless and wired broadband communication systems
• Imaging systems requiring high dynamic range
• Ultrasound medical equipment
• Spectral analysis instruments
• Portable instrumentation

Analog To Digital Converters (ADC) Procurement Notes

Verify the #TRPBF suffix indicates lead-free tape and reel packaging. Confirm the 'C' grade designation corresponds to the 0°C to 70°C operating temperature range. Ensure the source document matches the specific part number to avoid confusion with the pin-compatible LTC2248 (65Msps) or LTC2246 (25Msps).

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 40Msps sample rate is required for digitizing high-frequency signals. Choose between offset binary or two's complement digital outputs by configuring the MODE pin. Use the SENSE pin to adjust the analog input range based on signal amplitude requirements. Ensure the driving circuit can handle the 4pF sampling capacitance during the CLK low phase.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC224x family of 14-bit low-power 3V ADCs. It shares the same 32-pin QFN package and pinout as the LTC2248 and LTC2246. The primary distinction is the maximum sampling speed: 65Msps for LTC2248, 40Msps for LTC2247, and 25Msps for LTC2246. All variants offer similar AC performance metrics relative to their respective Nyquist frequencies.

Analog To Digital Converters (ADC) Replacement Considerations

Pin-compatible alternatives within the same package include the LTC2248 (higher speed) and LTC2246 (lower speed). Verify that the system clock frequency aligns with the selected variant's maximum sampling rate specifications.