AD9985AKSTZ-140

Specialized Overview

The AD9985AKSTZ-140 is an 8-bit, 140 MSPS analog interface IC designed for flat panel displays. It features a triple ADC with a 300 MHz full-power analog bandwidth and accepts 0.5 V to 1.0 V p-p differential inputs. The device includes an internal PLL generating pixel clocks from 12 MHz to 140 MHz, with typical jitter of 500 ps p-p at 140 MSPS. Powered by a single 3.3 V supply, it dissipates approximately 500 mW typically. It operates within a temperature range of -40°C to +85°C and is housed in an 80-lead LQFP package.

Specialized Feature Summary

• Integrated triple ADC with programmable gain, offset, and auto-clamping controls
• On-chip PLL generates pixel clock from HSYNC input with COAST capability
• Full sync processing including composite sync and sync-on-green support
• Fully programmable via 2-wire serial interface

Specialized Applications

• RGB graphics processing
• LCD monitors and projectors
• Plasma display panels
• Scan converters
• Digital TV

Specialized Procurement Notes

Verify the specific suffix 'KSTZ' against the manufacturer's current ordering guide to confirm pinout compatibility and RoHS status. Confirm availability as this part number may be subject to discontinuation or limited stock depending on the distributor. Ensure ESD precautions are observed during handling due to CMOS sensitivity.

Specialized Selection Notes

Select the AD9985AKSTZ-140 when a 140 MSPS maximum conversion rate is required for SXGA resolutions up to 1280 × 1024 at 75 Hz. Choose this model over the 110 MSPS variant if higher bandwidth or faster refresh rates are necessary. Ensure the design supports a 3.3 V power supply and accommodates the 80-lead LQFP footprint.

Specialized Part Context

This component belongs to the AD9985A series of analog interface ICs from Analog Devices. It is specifically optimized for capturing RGB graphics signals from personal computers and workstations. The device integrates all necessary functions for digitizing video signals, including clamping, gain adjustment, and clock generation, into a single monolithic solution.

Specialized Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's official obsolescence notices or contact Analog Devices directly for recommended alternatives or lifecycle updates.