CDK3400CTQ48

ADCs/DACs - Special Purpose Overview

The CDK3400CTQ48 is a triple 10-bit digital-to-analog converter (DAC) manufactured by Exar Corporation, operating at speeds up to 150 MSPS. It features TTL-compatible inputs and converts pixel data into analog current outputs capable of driving 37.5Ω or 75Ω loads with a 1.0Vpp swing. The device includes an internal 1.235V bandgap reference, double-buffered data for low distortion, and ±0.1% linearity error. It operates on a single +5V supply within a 48-lead TQFP package, ensuring performance from 0°C to +70°C.

ADCs/DACs - Special Purpose Feature Summary

• Triple 10-bit DAC architecture with 100/150 MSPS conversion rates
• TTL-compatible digital inputs and sync/blank controls
• Internal 1.235V bandgap voltage reference with external override capability
• Low glitch energy and ±0.1% integral/differential linearity error

ADCs/DACs - Special Purpose Applications

• Video signal conversion (RGB, YCBCR, Composite)
• Multimedia systems and image processing
• True-color graphics systems
• Broadcast television and HDTV equipment
• Direct digital synthesis

ADCs/DACs - Special Purpose Procurement Notes

Verify the manufacturer origin, as the datasheet identifies Exar Corporation as the producer while the brand input specifies MaxLinear. Confirm the specific speed grade (CDK3400 vs CDK3401) matches the required clock frequency. Ensure the TQFP-48 package variant aligns with PCB footprint requirements. Check RoHS compliance status if environmental regulations apply to the assembly process.

ADCs/DACs - Special Purpose Selection Notes

Select the CDK3400 variant for applications requiring a maximum sampling rate of 100 MSPS. Choose the CDK3401 variant if system timing demands 150 MSPS operation. Ensure the design accommodates the single +5V power supply requirement and provides adequate decoupling capacitors (0.1µF and 0.01µF) near VDD pins. Verify that the load resistance matches the 37.5Ω or 75Ω specifications to achieve the correct 1.0Vpp output swing.

ADCs/DACs - Special Purpose Part Context

This component belongs to the CDK3400/3401 family of triple video DACs produced by Exar Corporation. The family includes related parts such as the CDK3402/3403 (8-bit versions) and CDK3404 (8-bit, 180 MSPS). These devices are designed for high-speed graphics and video applications where low distortion and precise timing are critical.

ADCs/DACs - Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should evaluate other triple video DACs from various manufacturers, ensuring compatibility with 10-bit resolution, 150 MSPS speed, and TQFP-48 packaging constraints.