Analog Devices Inc. AD9883KST-110

Overview

AD9883KST-110 from Analog Devices is an 8-bit, 110 MSPS triple analog-to-digital converter IC optimized for RGB graphics capture in flat-panel display interfaces. It integrates a 300 MHz full-power analog bandwidth, on-chip PLL with 500 ps p-p jitter at 110 MSPS, and programmable clamp/gain/offset control - enabling SXGA (1280 × 1024 @ 60 Hz) support in LCD monitors and digital projectors.

For engineers reviewing the AD9883KST-110 datasheet, AD9883KST-110 pinout, AD9883KST-110 application, or AD9883KST-110 equivalent, key selection criteria include pixel clock jitter performance, sync-on-green processing capability, 3.3 V CMOS-compatible digital I/O, and internal midscale clamping for YUV signal handling.

Technical Context

The AD9883KST-110 implements a fully integrated analog front-end with three independent 8-bit ADCs, each featuring 0.5–1.0 V p-p input range, ±0.5 LSB typical DNL, and 44 dB SNR at 40.7 MHz. Its PLL generates pixel clocks from 12 MHz to 110 MHz using HSYNC and COAST inputs, maintaining phase alignment between DATACK, HSOUT, and RGB data outputs.

Sync processing includes composite sync detection, sync-on-green slicing with programmable 10 mV-step threshold (10–330 mV), and hot-plug–capable sync detect logic. All analog inputs are high-impedance and AC-coupled; clamp timing is configurable via internal counter or external CLAMP pin with polarity control.

Key Specifications

Pinout & Package

AD9883KST-110 is housed in an 80-lead LQFP (ST-80) package with exposed thermal pad, optimized for surface-mount assembly and thermal management in display interface modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9883KST-110, the AD9884AKSTZ-140 extends resolution and temperature range at the cost of higher power and non-pin-compatible PLL configuration, while the THS8200IPFP trades integration for resolution and clocking flexibility - making AD9883KST-110 optimal for cost- and space-constrained SXGA display interfaces requiring self-contained timing.

Availability

AD9883KST-110 is available at Aetrix Electronics and suitable for LCD monitor manufacturing, digital projector design, and scan converter development requiring stable component supply and long-term production continuity.

Supply support for AD9883KST-110 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.

The AD9883KST-110 belongs to Analog Devices' flat-panel display interface product line, designed specifically to simplify analog RGB digitization in commercial displays by integrating ADCs, PLL, sync processing, and programmable signal conditioning into a single chip.

FAQ

What is the maximum supported resolution for AD9883KST-110?

The AD9883KST-110 supports up to SXGA resolution (1280 × 1024 at 60 Hz) enabled by its 110 MSPS conversion rate and 300 MHz analog bandwidth. This matches the pixel clock requirement for SXGA timing, and the device's internal PLL can generate stable clocks across the 12–110 MHz range needed for common display modes. The AD9883KST-110 does not support UXGA or higher resolutions due to its hard-limited sampling rate.

Does AD9883KST-110 support sync-on-green (SOG) functionality?

Yes, AD9883KST-110 includes dedicated SOGIN and SOGOUT pins with an internal high-speed comparator and programmable 10 mV-step threshold (10–330 mV above negative peak). When configured, it extracts sync information from the green channel and outputs a clean digital signal on SOGOUT for use in sync separation. This eliminates external sync separator components in DVI-I and VGA-based designs using AD9883KST-110.

Can AD9883KST-110 operate with a 2.5 V digital supply?

Yes, AD9883KST-110 supports VDD = 2.5 V for its digital outputs (RED[7:0], GREEN[7:0], BLUE[7:0], DATACK, HSOUT, etc.), enabling direct interfacing with 2.5 V logic families without level shifters. The analog supply VD and PLL supply PVD remain at 3.3 V ±10%. This dual-supply flexibility is confirmed in the Absolute Maximum Ratings and switching specifications tables for AD9883KST-110.

What is the purpose of the COAST pin on AD9883KST-110?

The COAST pin on AD9883KST-110 allows the internal PLL to maintain its current pixel clock frequency and phase during temporary loss of HSYNC - such as during vertical blanking intervals or unstable source conditions. When asserted, COAST prevents PLL unlock, ensuring continuous, jitter-controlled clock output. This feature is essential for glitch-free display operation with PC graphics sources that may omit HSYNC during retrace periods.

How is clamping implemented in AD9883KST-110 for RGB signals?

AD9883KST-110 supports two clamping methods: internal (using HSYNC trailing edge + programmable clamp placement/duration registers) or external (via CLAMP pin assertion). For RGB, clamping restores black level to 0x00 code; for YUV, midscale clamping to 0x80 is selectable per channel via serial register bits. The MIDSCV pin provides the midscale reference voltage and must be bypassed with 0.1 µF regardless of clamp mode used in AD9883KST-110.