Analog Devices Inc. AD9882KST-100

Overview

AD9882KST-100 from Analog Devices is a dual-mode 8-bit, 100 MSPS analog and DVI 1.0-compatible video receiver IC for flat panel display interfaces. It integrates triple ADCs (140 MHz max), on-chip PLL with 500 ps p-p jitter at 100 MSPS, 3.3 V supply operation, full sync processing (HSYNC/VSYNC/SOG), and HDCP v1.0 support - enabling RGB graphics capture and digital video reception in LCD monitors and projectors.

For engineers reviewing the AD9882KST-100 datasheet, AD9882KST-100 pinout, AD9882KST-100 application, or AD9882KST-100 equivalent, key selection considerations include its dual-interface capability, 100 MSPS analog conversion rate, DVI 1.0 compliance up to SXGA@60 Hz, HDCP authentication/decryption functionality, and 100-lead LQFP package with shared analog/digital I/O mapping.

Technical Context

The AD9882KST-100 implements two independent interface paths: an analog front-end with three 8-bit ADCs, programmable gain/offset/clamp, and PLL-based pixel clock generation (12–100 MHz); and a digital DVI 1.0 receiver with intrapair skew tolerance of one full clock cycle, HDCP v1.0 engine, and 112 MHz maximum DATACK frequency. Both paths share output pins (RED/GREEN/BLUE/DATACK/HSOUT/VSOUT) and serial control via 2-wire SDA/SCL.

Its sync processing engine supports composite sync, sync-on-green (SOG), and separate HSYNC/VSYNC inputs, with configurable polarity and timing alignment. The internal 1.25 V reference (±4% accuracy, ±50 ppm/°C) and midscale clamp enable stable digitization across 0.5–1.0 V p-p analog input range without external components.

Key Specifications

Pinout & Package

AD9882KST-100 is housed in a 100-lead LQFP surface-mount package (14 mm × 14 mm, 0.5 mm pitch), Pb-free, with exposed thermal pad. Power domains are segregated: VD (analog core), VDD (digital outputs), and PVD (PLL clock generator) to minimize noise coupling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar video receiver applications.

Compared with AD9882KST-100, AD9883AKSTZ-140 extends analog bandwidth but requires revalidation of PLL loop filter and timing margins, while TFP410PZPR offers lower system cost in digital-only applications but removes all analog acquisition capability and sync processing flexibility.

Availability

AD9882KST-100 is available at Aetrix Electronics and suitable for LCD monitor design, plasma display controller development, and scan converter manufacturing requiring stable component supply and long-term industrial availability.

Supply support for AD9882KST-100 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.

The AD988x family was designed specifically for flat panel display interface consolidation - integrating analog video digitization, DVI reception, and HDCP into a single chip to simplify display controller design and reduce system cost.

FAQ

What is the maximum analog input frequency supported by the AD9882KST-100?

The AD9882KST-100 supports a full-power analog bandwidth of 300 MHz, enabling accurate digitization of fast-rising RGB signals up to SXGA (1280 × 1024) resolution at 75 Hz. This bandwidth is verified under typical operating conditions (VD = 3.3 V, 25°C) and ensures minimal amplitude roll-off and phase distortion for high-fidelity graphics capture in the AD9882KST-100.

Does the AD9882KST-100 support both analog and digital video inputs simultaneously?

No - the AD9882KST-100 operates in either analog or digital interface mode, selected automatically via active input detection or manually via serial register control. While both input paths are physically present (RAIN/GAIN/BAIN and RX0±/RX1±/RX2±), only one path drives the shared RED/GREEN/BLUE outputs and DATACK/HSOUT/VSOUT timing signals at any given time. The AD9882KST-100 does not perform concurrent dual-input processing.

What is the role of the FILT pin on the AD9882KST-100?

The FILT pin on the AD9882KST-100 connects to external passive components (typically RC network) that configure the loop filter for the internal PLL. Proper filtering is essential to achieve low-jitter pixel clock generation (500 ps p-p at 100 MSPS) and stable lock across the 12–100 MHz output range. Layout guidelines specify minimizing parasitics on this node to maintain PLL stability in the AD9882KST-100.

Can the AD9882KST-100 be used without HDCP functionality enabled?

Yes - HDCP can be disabled via serial register configuration, allowing the AD9882KST-100 to operate as a standard DVI 1.0 receiver for non-protected content. Disabling HDCP reduces power consumption (typical total current drops from 340 mA to ~265 mA) and eliminates handshake latency, making the AD9882KST-100 suitable for test equipment or open-content display systems.

How does the AD9882KST-100 handle sync-on-green (SOG) signals?

When SOGIN is active, the AD9882KST-100 uses an internal high-speed comparator with programmable threshold (set via Register 0x0F, Bits 7–3) to extract sync pulses from the green channel. The resulting digital output appears on SOGOUT and feeds the sync processing engine, which separates HSYNC/VSYNC and aligns them to the pixel clock - enabling reliable SOG-based timing recovery in the AD9882KST-100 without external components.