ASNT7121-KMA

Analog To Digital Converters (ADC) Overview

The ASNT7121-KMA is a 4-bit flash analog-to-digital converter (ADC) with a sampling rate of 15 GS/s and an analog input bandwidth of 20 GHz. It features a selectable clocking mode using either an external high-speed clock or an internal PLL with a central frequency of 10 GHz. The device includes an on-chip 4-to-16 demultiplexer to reduce the output data rate to DC–3.75 Gbps. Power consumption is 2.8 W from a single +3.5 V supply, housed in a custom 100-pin metal-ceramic CQFP package.

Analog To Digital Converters (ADC) Feature Summary

• 15 GS/s sampling rate with 20 GHz analog input bandwidth
• Internal PLL with 10 GHz central frequency or external clock support
• On-chip 4:16 demultiplexer for parallel LVDS output
• Selectable PRBS 2^7-1 generator for interface alignment

Analog To Digital Converters (ADC) Applications

• High-speed optical communication systems
• Wideband signal analysis and testing equipment
• Military and aerospace radar applications

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific revision level against the datasheet Rev. 1.5.2 February 2020. Confirm that the application board supports the custom 100-pin CQFP package and provides adequate thermal management for the center heat slug, as the junction-to-case thermal resistance is 4°C/W.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 4-bit resolution at 15 GS/s is required. Ensure the system can accommodate the 2.8 W power dissipation and provide a stable +3.5 V supply. Verify compatibility with the differential CML input requirements and the LVDS output interface standards.

Analog To Digital Converters (ADC) Part Context

Manufactured by Advanced Science And Novel Technology Company, Inc. (ADSANTEC), located in Torrance, California. The part number suffix KMA indicates the specific 100-pin metal-ceramic package configuration.

Analog To Digital Converters (ADC) Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Due to the proprietary nature of the flash ADC architecture and custom packaging, direct pin-compatible replacements are not documented.

Analog To Digital Converters (ADC) FAQ

What is the function of the vrefcrl and vlsbcrl pins?

These pins allow adjustment of the ADC threshold voltages. vrefcrl shifts the DC levels of all thresholds simultaneously, while vlsbcrl alters the voltage range of the least significant bit (LSB).

How does the Clock Multiplication Unit (CMU) operate?

The CMU operates in two modes: clock multiplication (PLL on) which multiplies an external reference clock, or clock division (PLL off) which divides an external high-speed clock. Both modes generate internal clocks divided by 2, 4, 8, and 16.

What is the purpose of the on-chip PRBS generator?

The PRBS generator creates a 127-bit pseudo-random binary sequence to substitute encoded data, allowing for the alignment and testing of the output interface without requiring actual analog input signals.