AD9680BCPZ-500

Analog To Digital Converters (ADC) Overview

The AD9680BCPZ-500 is a dual-channel, 14-bit analog-to-digital converter (ADC) operating at a maximum sampling rate of 500 MSPS. It features a multistage differential pipelined architecture with integrated output error correction logic and on-chip buffers. The device supports flexible input ranges from 1.46 V p-p to 2.06 V p-p and includes two digital downconverters (DDCs) per channel, each containing a 12-bit NCO and four half-band filters. Digital outputs utilize JESD204B Subclass 1 interface. Power supply requirements include AVDD1 at 1.25 V, AVDD2 at 2.5 V, AVDD3 at 3.3 V, DVDD at 1.25 V, DRVDD at 1.25 V, and SPIVDD between 1.8 V and 3.3 V. Total power dissipation is typically 2.9 W.

Analog To Digital Converters (ADC) Feature Summary

• Integrated digital downconverters with numerically controlled oscillators and decimation filters for signal processing.
• JESD204B Subclass 1 high-speed serialized digital outputs supporting flexible lane configurations.
• Programmable fast overrange detection and amplitude detect bits for automatic gain control implementation.
• Buffered analog inputs with programmable termination impedance options.

Analog To Digital Converters (ADC) Applications

• Diversity multiband, multimode digital receivers
• General-purpose software radios
• Radar systems
• Signals intelligence (SIGINT)
• DOCSIS 3.0 CMTS upstream receive paths

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix BCPZ indicates the LFCSP-64 package type and standard commercial/industrial temperature range. Confirm the -500 suffix corresponds to the 500 MSPS speed grade. Ensure compatibility with required JESD204B link rates and SPI voltage levels before ordering.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a dual-channel 14-bit ADC with 500 MSPS throughput is required. Consider the integrated DDCs if baseband processing is needed. Verify that the 2 GHz full-power bandwidth exceeds the highest frequency of interest. Check power budget constraints against the typical 2.9 W dissipation.

Analog To Digital Converters (ADC) Part Context

This part belongs to the AD9680 family of high-speed dual ADCs. Other variants in the series include the AD9680-1250 (1.25 GSPS), AD9680-1000 (1 GSPS), and AD9680-820 (820 MSPS). All share the same pinout and architectural features but differ in maximum sampling rates and associated AC performance metrics.

Analog To Digital Converters (ADC) Replacement Considerations

Direct replacements within the same family include AD9680-1000, AD9680-820, and AD9680-1250. These parts are pin-compatible but offer different sampling speeds. Verify that the higher or lower speed grades meet the system's timing and performance requirements without requiring schematic changes.

Analog To Digital Converters (ADC) FAQ

What is the default configuration of the Digital Downconverters (DDCs)?

The DDCs are bypassed by default. They must be enabled via SPI programming to utilize the 12-bit NCO and half-band filters.

How many lanes can the JESD204B interface support?

The JESD204B interface supports flexible configurations of one, two, or four lanes, depending on the DDC configuration and the receiving logic device's acceptable lane rate.

What is the purpose of the Fast Detect output bits?

The Fast Detect output bits monitor incoming signal power using a programmable threshold detector. If the input level exceeds the threshold, the indicator goes high to help avoid overrange conditions.