P19800B

Overview

The P19800B is a spectrometer ASIC designed for processing RF input signals with bandwidths up to 5.5GHz. It integrates a VGA, twenty time-interleaved 6-bit ADCs, an FFT engine based on polyphase filtering, and an accumulator capable of accumulating up to 34 seconds of frequency-domain data. The device digitizes signals into 8192 frequency bins within the 0 to 4GHz range, utilizing a sampling rate up to 8GS/s. Key internal components include a PLL-based frequency synthesizer, an SPI interface for control, and a digital control unit. Fabricated using 28nm CMOS technology, it operates in a temperature range of -40°C to 110°C.

Feature Summary

• Processes input signal bandwidth up to 5.5GHz with a sampling rate up to 8GS/s
• Digitizes RF signals into 8192 frequency bins with programmable accumulation from 2us to 34s
• Integrates a 16GHz PLL, VGA, and 20x time-interleaved 6-bit ADCs
• Power consumption is less than 1.6W at full functionality and under 1.2W at 4MHz bin resolution

Applications

• Remote sensing instruments
• Radio astronomy
• Planet and Sun exploration missions
• Synthetic aperture radiometers
• Spectrum analyzers

Procurement Notes

Verify the specific revision status (Rev 2) against current availability requirements. Confirm that the BGA package dimensions (12.8mm x 12.8mm) align with the target PCB layout. Ensure the design supports the required SPI interface for programming and diagnostics. Check if the evaluation board is needed for initial validation before final procurement.

Selection Notes

Select this component when high-bandwidth spectral analysis is required for space or ground-based applications. The 28nm CMOS process and radiation hardening features make it suitable for harsh environments. Consider the power constraints, as full functionality draws under 1.6W. Verify that the 0 to 4GHz operational range covers the specific frequency bins needed for the application.

Part Context

The P19800B is part of Pacific Microchip's specialized IC portfolio focused on RF spectrum analysis. It serves as a core processing unit for advanced instrumentation, offering both standalone chip and IP block integration options. The device represents a mature development stage, having undergone feasibility proofs, prototyping, and testing milestones.

Replacement Considerations

No direct public substitutes are documented. Future iterations may include Rev 3 ASIC improvements. Integration into SoCs via IP blocks offers an alternative architectural approach rather than a direct pin-compatible replacement.