Analog Devices Inc. AD9888KS-100

Overview

AD9888KS-100 from Analog Devices is an 8-bit, 100 MSPS triple analog-to-digital converter optimized for RGB graphics capture in flat-panel display interfaces. It integrates a 500 MHz programmable analog bandwidth ADC, internal 1.25 V reference, PLL-based pixel clock generator (10–100 MHz), midscale clamping, and dual-channel 4:2:2 output formatting. It supports UXGA (1600×1200@75 Hz) signal acquisition with <450 ps p-p PLL jitter at full rate.

For engineers reviewing the AD9888KS-100 datasheet, AD9888KS-100 pinout, AD9888KS-100 application, or AD9888KS-100 equivalent, key selection criteria include its 100 MSPS conversion rate, 0.5–1.0 V analog input range, 3.3 V single-supply operation, hot-plug sync detect capability, and support for dual-input mux and external clock bypass - all critical for LCD monitor, plasma display, and digital TV timing interface design.

Technical Context

The AD9888KS-100 implements three independent 8-bit ADCs with fully synchronized sampling clocks derived from an on-chip PLL locked to HSYNC/COAST inputs. Its PLL uses a VCO range = 10, charge pump current = 100 µA, and PLL divider = 1693 to achieve stable 100 MHz pixel clock generation with ≤470 ps p-p jitter (typical 450 ps).

It features full sync processing including composite sync detection, sync-on-green slicing, and programmable clamp timing - enabling robust handling of PC graphics signals with variable blanking intervals. The device supports both single-channel (Port A only) and dual-channel (A/B interleaved or parallel) output modes via register-controlled 2-wire serial interface (SCL/SDA/A0).

Key Specifications

Pinout & Package

AD9888KS-100 is housed in a 128-lead MQFP (Metric Quad Flat Package), surface-mount, plastic package with 0.4 mm lead pitch, specified for 0°C to 70°C operation. The package supports fine-pitch PCB layout and thermal dissipation up to 35°C/W (θJA).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog flat-panel interface applications.

Compared with AD9888KS-140 and AD9888KS-170, the AD9888KS-100 offers the lowest power consumption (<850 mW) and tightest jitter specification at its rated 100 MSPS, making it optimal for thermally constrained or cost-sensitive LCD monitor designs where full 170 MSPS capability is unnecessary.

Availability

AD9888KS-100 is available at Aetrix Electronics and suitable for LCD monitor interface, plasma display controller, and digital TV video decoder applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AD9888KS-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The AD9888 product line delivers monolithic analog interface ICs for flat-panel display systems, designed specifically to replace multi-chip VGA digitizer solutions with integrated ADCs, PLLs, sync processors, and programmable clamping - reducing design complexity and board area.

FAQ

What is the maximum pixel clock frequency supported by the AD9888KS-100?

The AD9888KS-100 supports a maximum PLL-generated pixel clock frequency of 100 MHz, verified under test conditions using VCO range = 10, charge pump current = 100 µA, and PLL divider = 1693. This enables reliable digitization of UXGA (1600×1200) video at 75 Hz. An external clock up to 170 MHz may be applied via CKEXT if the internal PLL is disabled.

Does the AD9888KS-100 support sync-on-green (SOG) input processing?

Yes, the AD9888KS-100 supports sync-on-green input processing via SOGIN0 and SOGIN1 pins. These inputs feed a high-speed comparator with an internally generated, variable threshold (nominally 0.15 V above negative peak), producing a clean SOGOUT signal containing composite sync information. Configuration is controlled through registers 0x10 and 0x11 in the 2-wire serial interface.

Can the AD9888KS-100 operate with a single 3.3 V supply?

Yes, the AD9888KS-100 operates from a single 3.3 V supply across all rails: analog (VD), output (VDD), and PLL (PVD). Each rail accepts 3.3 V ±10%, and separate decoupling is required per pin group. Total typical power dissipation is <850 mW at 100 MSPS, confirming full functionality under single-rail biasing.

What output formats does the AD9888KS-100 support?

The AD9888KS-100 supports two primary output configurations: single-channel mode (all data on Port A, Port B high-Z) and dual-channel mode (interleaved or parallel pixel distribution across Port A and Port B per color channel). Dual-channel mode is enabled via Register 0x15 Bit 7, with output format selected by Bit 6 (parallel vs. interleaved), supporting 4:2:2 YUV or RGB data packing.

Is the AD9888KS-100 pin-compatible with other AD9888 variants like AD9888KS-140?

Yes, the AD9888KS-100 is pin-compatible and footprint-compatible with AD9888KS-140 and AD9888KS-170. All share identical 128-lead MQFP packaging, pin assignments, register map, and electrical interface. Differences are limited to maximum conversion rate, PLL configuration settings, and corresponding jitter performance - no PCB changes are required when upgrading within the AD9888KS family.