Analog Devices Inc. AD9984AKCPZ-140

Overview

AD9984AKCPZ-140 from Analog Devices is a 10-bit, 140 MSPS triple analog-to-digital converter optimized for RGB/YPbPr video digitization in display interface applications. It integrates a PLL-based pixel clock generator, auto-offset calibration, channel-to-channel gain matching, and programmable output drive strength. Designed for HDTV capture up to 1080p and UXGA graphics (1600 × 1200 @ 60 Hz), it supports tri-level sync, sync-on-green, and dual-input muxing.

For engineers reviewing the AD9984AKCPZ-140 datasheet, AD9984AKCPZ-140 pinout, AD9984AKCPZ-140 application, or AD9984AKCPZ-140 equivalent, key selection criteria include its 140 MSPS conversion rate, 300 MHz full-power analog bandwidth, 10-bit resolution with ±0.7 LSB DNL (typ), 80-lead LQFP package, and support for 4:4:4/4:2:2/DDR output formats - all critical for high-fidelity video acquisition systems.

Technical Context

The AD9984AKCPZ-140 implements three independent 10-bit ADCs with internal PGA, clamp control, and auto-calibration logic for offset and gain matching across R/G/B channels. Its on-chip PLL accepts tri-level sync (YPbPr) or Hsync (RGB) inputs and generates a stable 10–140 MHz sampling clock with 32-step phase adjustment and low jitter at 140 MSPS.

Digital interface uses I²C (SDA/SCL) for register configuration, supports dual analog input muxing per channel (RAIN0/1, GAIN0/1, BAIN0/1), and delivers CMOS outputs (RED[9:0], GREEN[9:0], BLUE[9:0]) with programmable drive strength and 1.8–3.3 V VDD compatibility. Sync processing includes odd/even field detection, regenerated HSOUT/VSOUT, and SOGOUT slicer output with configurable source selection.

Key Specifications

Pinout & Package

AD9984AKCPZ-140 is housed in an 80-lead Pb-free low-profile quad flat package (LQFP), thermally rated at θ_JA = 35°C/W. The package supports standard surface-mount reflow and provides dedicated power/ground segregation for analog (VD), digital output (VDD), PLL (PVD), and logic (DAVDD) domains.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar video analog-to-digital conversion applications.

Compared with AD9984AKCPZ-140, the AD9984AKSTZ-140 offers identical electrical performance in a smaller LFCSP package, while the AD9983AKCPZ reduces cost and complexity at the expense of maximum pixel rate, sync flexibility, and feature depth - making it suitable only for less demanding video acquisition roles.

Availability

AD9984AKCPZ-140 is available at Aetrix Electronics and suitable for advanced TV input processing, HDTV capture cards, LCD monitor video interfaces, and plasma display panel controllers requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AD9984AKCPZ-140 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design and manufacturing expertise spanning over five decades.

The AD9984A product line was developed specifically for high-fidelity video digitization in consumer and professional display systems, emphasizing integrated sync processing, auto-calibration, and robust analog front-end architecture for RGB/YPbPr signal chains.

FAQ

What is the maximum pixel clock frequency supported by the AD9984AKCPZ-140?

The AD9984AKCPZ-140 supports a maximum conversion rate of 140 MSPS, enabling pixel clock frequencies up to 140 MHz. This covers all HDTV standards up to 1080p60 and graphics resolutions such as UXGA (1600 × 1200 @ 60 Hz). The on-chip PLL generates this clock from Hsync or tri-level sync inputs, with 32-step phase adjustment for precise sampling point control. The AD9984AKCPZ-140 maintains timing alignment between DATACK, HSOUT, and parallel video outputs across the full rate range.

Does the AD9984AKCPZ-140 support sync-on-green (SOG) processing?

Yes, the AD9984AKCPZ-140 includes dedicated SOGIN0/SOGIN1 inputs and an internal high-speed comparator with programmable 8 mV threshold steps (8–256 mV above negative peak). It outputs processed sync via SOGOUT, configurable to pass raw SOGIN, filtered Hsync, or regenerated Hsync. This enables reliable composite sync extraction from green-channel-embedded signals - a key requirement for legacy VGA and RGBHV sources. The AD9984AKCPZ-140 also supports automatic polarity detection and filtering to suppress noise-induced false triggers.

How does auto-offset and auto-gain matching work in the AD9984AKCPZ-140?

The AD9984AKCPZ-140 performs auto-offset calibration by measuring DC reference levels during blanking intervals and adjusting each channel's baseline to restore signal fidelity. Auto-gain matching compares amplitude responses across R/G/B paths and applies digital correction to minimize channel-to-channel mismatch - typically reducing gain error to <1% FS. Both functions are enabled via serial register control and operate without external components. These calibrations ensure consistent color reproduction in the AD9984AKCPZ-140 across temperature and supply variations, eliminating manual trimming in production.

What power supply rails does the AD9984AKCPZ-140 require?

The AD9984AKCPZ-140 requires four independent supply rails: VD = 1.8 V (analog core), VDD = 1.8–3.3 V (digital outputs), PVD = 1.8 V (PLL domain), and DAVDD = 1.8 V (digital logic). Each has specified tolerance (e.g., VD: 1.7–1.9 V) and current draw (e.g., ID = 255 mA typ). Proper decoupling - especially for PVD and VD - is critical to maintain low PLL jitter and ADC SNR. The AD9984AKCPZ-140's segregated supplies enable noise isolation between sensitive analog and high-speed digital sections.

Is the AD9984AKCPZ-140 pin-compatible with other members of the AD9984A family?

No - the AD9984AKCPZ-140 (80-lead LQFP) is not pin-compatible with the AD9984AKSTZ-140 (64-lead LFCSP), though both share identical functional specifications and register maps. Pin counts, layouts, and thermal pad configurations differ significantly. The AD9984AKCPZ-140 requires the full 80-pin footprint shown in Figure 2 of the datasheet. Substituting packages without board redesign will result in connectivity failure. Always verify mechanical and thermal constraints before selecting between AD9984AKCPZ-140 and AD9984AKSTZ-140.