Precision Timing for PCIe in Medical Imaging and AI

Precision timing is critical in medical imaging and AI systems. High-resolution, multi-channel data acquisition relies on accurate PCIe clocking to capture and transfer image data with precision, while GPUs require low-jitter timing for high-performance AI processing. SiTime low-jitter oscillators and PCIe fanout buffers provide robust clock generation and distribution, enabling reliable imaging data flow and AI analysis.

Features

• SiTime oscillators integrate on-chip regulators to filter power-supply noise.
• PCIe buffers provide low-power HCSL outputs with integrated termination resistors.
• PCIe buffers provide programmable output slew rates and individual output control through I2C and output-enable pins.
• Spread-spectrum-compatible buffers track an incoming spread-spectrum clock, supporting EMI reduction in compatible system architectures.

Applications

• PCIe-based medical imaging acquisition platforms
• GPU-assisted image reconstruction systems
• AI-assisted imaging workstations
• Imaging data storage subsystems

Key components

• SiT9371 MEMS differential oscillator provides a 100 MHz reference with 15 fs RMS phase jitter (typ.) under PCIe Gen 5 common-clock measurement conditions. It offers HCSL and low-power HCSL outputs, packages down to 2.0 × 1.6 mm, and operating-temperature options up to +105°C.
• SiT9231x/RC190x PCIe fanout buffer provides four low-power HCSL 4~20 outputs. It specifies 6 fs RMS additive phase jitter (typ.) at 100 MHz with PCIe Gen 7 performance. 

Benefits

• Provides reference-clock jitter margin within PCIe links carrying imaging data to reconstruction and AI processing hardware.
• Allows engineers to expand a shared-reference clock tree as a platform adds acquisition cards or accelerators.
• Supports compact board layouts through small oscillator packages and integrated buffer output terminations that reduce external components.

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