LTC2159IUK#PBF

Analog To Digital Converters (ADC) Overview

The LTC2159IUK#PBF is a 16-bit, 20Msps low-power analog-to-digital converter (ADC) designed for digitizing high-frequency, wide dynamic range signals. It operates on a single 1.8V supply with typical power dissipation of 43mW in CMOS mode. Key AC performance metrics include a 77dB Signal-to-Noise Ratio (SNR) and 90dB Spurious Free Dynamic Range (SFDR). The device features an ultralow jitter of 0.07ps RMS, enabling effective undersampling of IF frequencies. DC specifications guarantee ±2LSB Integral Non-Linearity (INL), ±0.5LSB Differential Non-Linearity (DNL), and no missing codes across the operating temperature range.

Analog To Digital Converters (ADC) Feature Summary

• 77dB SNR and 90dB SFDR at 20Msps sampling rate
• Ultralow jitter of 0.07ps RMS for excellent noise performance
• Selectable analog input ranges: 1VP-P to 2VP-P via SENSE pin
• Configurable digital outputs: Full Rate CMOS, DDR CMOS, or DDR LVDS
• Integrated optional clock duty cycle stabilizer and data output randomizer

Analog To Digital Converters (ADC) Applications

• Communications systems
• Cellular base stations
• Software Defined Radios (SDR)
• Portable medical imaging
• Multichannel data acquisition

Analog To Digital Converters (ADC) Procurement Notes

Verify the ordering suffix #PBF indicates a lead-free finish and tube packaging. Confirm the I-grade designation ensures operation within the –40°C to 85°C industrial temperature range. Ensure the UK package dimensions (7mm × 7mm QFN) match the target PCB footprint requirements.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring low power consumption alongside high dynamic range at moderate sampling speeds. Choose the appropriate output mode (CMOS vs. LVDS) based on system noise sensitivity and trace count constraints. Utilize the serial SPI port for configuring input ranges and output formats without additional hardware logic.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC2159 family of 16-bit ADCs. The 'I' suffix denotes the industrial temperature grade variant, while 'UK' specifies the 48-lead plastic QFN package. The '#PBF' suffix confirms compliance with lead-free manufacturing standards as per Linear Technology/Analog Devices specifications.

Analog To Digital Converters (ADC) Replacement Considerations

Direct replacements within the same family include the LTC2159CUK#PBF for commercial temperature range applications (0°C to 70°C). Cross-family upgrades may involve higher-speed variants like the LTC2155 or LTC2195, though these require significant redesign due to differences in resolution, channel count, and interface protocols.