Analog Devices Inc. AD9888KS-140

Overview

AD9888KS-140 from Analog Devices is an 8-bit, 140 MSPS triple analog-to-digital converter optimized for RGB graphics capture in flat-panel display interfaces. It features a 500 MHz programmable analog bandwidth, <450 ps_p-p PLL jitter at full rate, 0.5–1.0 V analog input range, and integrated midscale clamping - enabling UXGA (1600×1200@75 Hz) support in LCD monitors and projectors.

For engineers reviewing the AD9888KS-140 datasheet, AD9888KS-140 pinout, AD9888KS-140 application, or AD9888KS-140 equivalent, key selection criteria include tested 140 MSPS conversion rate (not 100 or 170 MSPS), dual-channel RGB output mode, sync-on-green processing capability, and 128-lead MQFP package with 3.3 V single-supply operation.

Technical Context

The AD9888KS-140 implements a fully integrated analog interface with three independent 8-bit ADCs, each supporting 0.5–1.0 V p-p input signals and programmable gain/offset/clamp controls. Its on-chip PLL generates pixel clocks from HSYNC and COAST inputs, with frequency range 10–140 MHz and phase-adjustable sampling.

Sync processing includes composite sync detection, sync-on-green slicing with adjustable threshold, and hot-plug–capable sync detect logic. The device supports both single-port (Port A only) and dual-port (A/B interleaved or parallel) output modes via serial register configuration, with all outputs compliant to 3.3 V CMOS levels and configurable drive strength.

Key Specifications

Pinout & Package

AD9888KS-140 is housed in a 128-lead MQFP (Metric Quad Flat Package), surface-mount, plastic package with 0.4 mm lead pitch and exposed thermal pad. Pin layout supports dual-channel RGB signal routing, dedicated sync inputs/outputs, and full 2-wire serial control interface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9888KS-170, the AD9888KS-140 delivers identical feature set and pin compatibility at reduced jitter margin and power consumption, making it optimal for cost-sensitive UXGA displays. Unlike ADV7123KSTZ240 - a DAC - AD9888KS-140 performs full analog capture with integrated clock synthesis and sync handling, eliminating six to eight external components in typical flat-panel designs.

Availability

AD9888KS-140 is available at Aetrix Electronics and suitable for LCD monitor manufacturing, plasma display controller development, and digital TV signal conditioning requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AD9888KS-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.

The AD9888 product line was designed specifically for analog video capture in flat-panel display interfaces, integrating ADCs, PLLs, sync processors, and clamping circuitry into a single monolithic solution to replace multi-chip subsystems.

FAQ

What is the maximum guaranteed conversion rate for AD9888KS-140?

The AD9888KS-140 is specified and production-tested at a maximum conversion rate of 140 MSPS. This is explicitly stated in the datasheet's ordering guide and Table 1, where AD9888KS-140 parameters are tested at 140 MHz - distinct from the 100 MSPS (AD9888JS-100) and 170 MSPS (AD9888KS-170) variants. Operating beyond 140 MSPS is not guaranteed for this part number.

Does AD9888KS-140 support sync-on-green (SOG) input processing?

Yes, AD9888KS-140 supports SOG input processing via dedicated SOGIN0 and SOGIN1 pins. Each connects to a high-speed comparator with an internally generated, programmable threshold (default ~0.15 V above negative peak). When enabled, it produces a clean SOGOUT signal containing composite sync information - confirmed in the Functional Block Diagram, General Description, and Pin Function Descriptions sections of the Rev. C datasheet.

What package type and pin count does AD9888KS-140 use?

AD9888KS-140 uses a 128-lead MQFP (Metric Quad Flat Package), surface-mount plastic package with 0.4 mm lead pitch and exposed thermal pad. This is documented in the General Description (Page 1), Pin Configuration diagram (Figure 3), and Ordering Guide (Page 36) of the AD9888 Rev. C datasheet - and applies identically to all AD9888KS-x variants including AD9888KS-140.

Can AD9888KS-140 operate with an external pixel clock instead of its internal PLL?

Yes, AD9888KS-140 can bypass its internal PLL and accept an external pixel clock via the CKEXT pin. This is enabled by setting Register 0x15 Bit 0 (external clock select) to 1. The device retains full functionality - including sync processing, clamping, and output formatting - while using the external clock, as detailed in the "CKEXT" pin description (Page 9) and Clock Generation section (Page 14).

Is AD9888KS-140 pin-compatible with AD9888KS-170?

Yes, AD9888KS-140 is pin-compatible with AD9888KS-170. Both share identical 128-lead MQFP packaging, pin configuration (Figure 3), pin functions (Table 3), and register map. The datasheet confirms this in the Revision History (Page 3) and Ordering Guide (Page 36), where KS-140 and KS-170 appear in the same package column with no pinout differentiation.