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Analog Devices Inc. AD9981KSTZ-80
- Part No.:
- AD9981KSTZ-80
- Manufacturer:
- Analog Devices Inc.
- Category:
- Specialized
- Package:
- 80-LQFP
- Datasheet:
-
AD9981KSTZ-80.pdf
- Description:
- IC INTERFACE SPECIALIZED 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,522
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Product details
Overview
AD9981KSTZ-80 from Analog Devices is a monolithic 10-bit, 80 MSPS analog video interface IC optimized for RGB/YPbPr signal capture in HDTV and LCD display systems. It integrates triple ADCs, PLL-based pixel clock generation (10–80 MHz), auto-offset calibration, 2:1 input mux per channel, and programmable output drive strength. Its 200 MHz full-power analog bandwidth supports XGA (1024×768@85 Hz) graphics digitization.
For engineers reviewing the AD9981KSTZ-80 datasheet, AD9981KSTZ-80 pinout, AD9981KSTZ-80 application, or AD9981KSTZ-80 equivalent, key selection criteria include guaranteed 80 MSPS conversion rate (not 95 MSPS), 9% p-p PLL jitter at 80 MSPS, 0.5–1.0 Vp-p analog input range, and LQFP-80 package compatibility with industrial temperature range (0°C to +70°C).
Technical Context
The AD9981KSTZ-80 implements a triple 10-bit ADC architecture with independent 2:1 analog multiplexers per RGB channel, enabling dual-source switching without external circuitry. Its on-chip PLL derives sampling clocks from Hsync or three-level sync inputs and maintains frequency via Coast mode during vertical blanking intervals.
Signal conditioning includes programmable gain/offset control, internal clamp generation or external CLAMP pin synchronization, and sync-on-green (SOG) slicing with 8 mV-step threshold adjustment. Output formatting supports 4:4:4, 4:2:2, and DDR modes with phase-aligned DATACK, HSOUT, and VSOUT/A0 outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit ADC with guaranteed no missing codes - ensures full dynamic range fidelity for RGB color depth. |
| Max Conversion Rate | 80 MSPS - defines maximum pixel clock frequency for XGA@85 Hz and 720p HDTV capture. |
| Analog Bandwidth | 200 MHz full-power - preserves edge integrity in high-resolution graphics signals up to 1024×768. |
| PLL Jitter (p-p) | 750 ps at 80 MSPS - limits timing uncertainty to <1% of pixel period, critical for stable image reconstruction. |
| Input Range | 0.5 V to 1.0 Vp-p - matches standard RGB graphics signal amplitude, enabling direct ac-coupled interface. |
| Power Supply | VD = 3.3 V, VDD = 1.8–3.3 V, PVD = 1.8 V, DAVDD = 1.8 V - separates analog, PLL, digital I/O, and logic domains for noise isolation. |
| Total Power Dissipation | 953 mW typical - enables thermal management in compact display controller PCB layouts without forced cooling. |
Pinout & Package
AD9981KSTZ-80 is housed in an 80-pin Pb-free LQFP surface-mount package (12 mm × 12 mm, 0.5 mm pitch), specified for 0°C to +70°C operation. Thermal resistance θJA = 35°C/W supports conduction-cooled designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RAIN0/GAIN0/BAIN0 | Channel 0 analog inputs (R/G/B) | High-impedance, ac-coupled inputs accepting 0.5–1.0 Vp-p RGB signals; enable dual-source mux via RAIN1/GAIN1/BAIN1. |
| RED[9:0]/GREEN[9:0]/BLUE[9:0] | 10-bit parallel CMOS data outputs | Three-state outputs powered by VDD (1.8–3.3 V); MSB-aligned, fixed delay from sampling time ensures deterministic timing. |
| DATACK/HSOUT/VSOUT-A0 | Synchronized clock and sync outputs | DATACK is phase-aligned with pixel data; HSOUT mirrors Hsync polarity/duration; VSOUT/A0 shares pin with serial address A0. |
| EXTCLK/COAST | Shared pin for external clock or PLL coast control | Enables bypass of internal PLL (EXTCLK) or continuous clock generation during Hsync dropout (COAST); polarity programmable. |
| SDA/SCL | I²C-compatible serial control interface | 100 kHz max clock; supports configuration of gain, offset, clamp, PLL dividers, phase, and output format registers. |
Key Features
| Feature | Design Value |
|---|---|
| Triple 10-bit ADC with 2:1 MUX per channel | Eliminates need for external analog switches when supporting dual-input sources (e.g., PC + HDMI converter). |
| Auto-offset calibration across all three channels | Compensates for DC drift and inter-channel offset mismatches without host MCU intervention or calibration routines. |
| Programmable output drive strength | Adjusts slew rate to match trace impedance and reduce EMI in high-speed parallel bus routing to FPGA or ASIC. |
| Sync-on-green (SOG) slicer with 8 mV-step threshold | Enables robust composite sync extraction from green channel in legacy VGA sources without external comparators. |
| 32-step sampling clock phase adjustment | Permits fine-tuning of sampling point relative to pixel eye diagram to maximize SNR in noisy or mismatched cable environments. |
Applications
| Advanced TV Input Processing | LCD Monitor Signal Acquisition |
|---|---|
|
Use Scenario: Digitizing RGBHV signals from PC graphics cards into digital video processors for scaling and deinterlacing. IC Role / Device Role / Timing Role: Primary analog front-end ADC capturing red, green, and blue channels at up to 80 MSPS with regenerated HSOUT/VSOUT timing. Use Value: 200 MHz analog bandwidth preserves sharpness in text and UI elements; auto-offset maintains color balance across varying source brightness levels. |
Use Scenario: Converting analog VGA inputs to digital LVDS or embedded DP streams in commercial LCD monitors. IC Role / Device Role / Timing Role: RGB interface IC providing synchronized 10-bit pixel data, DATACK, and HSOUT to downstream timing controllers. Use Value: Programmable output drive strength reduces signal integrity issues on long PCB traces; SOGIN0/SOGIN1 support legacy sync-on-green sources. |
| HDTV Set-Top Box Video Capture | Plasma Display Panel Controller |
|
Use Scenario: Capturing YPbPr component video from DVD players or broadcast receivers for MPEG encoding and display processing. IC Role / Device Role / Timing Role: Triple ADC with three-level sync PLL lock for YPbPr timing recovery; odd/even field detection for interlaced content handling. Use Value: 9% p-p PLL jitter at 80 MSPS ensures stable pixel sampling in motion-intensive video; internal clamp eliminates need for external DC restoration circuits. |
Use Scenario: Digitizing analog RGB signals for real-time gamma correction and subfield driving in AC plasma displays. IC Role / Device Role / Timing Role: High-fidelity analog interface delivering low-noise 10-bit pixel data with precise phase alignment between DATACK and RED/GREEN/BLUE outputs. Use Value: Differential nonlinearity ≤0.4 LSB (typ) preserves grayscale linearity critical for plasma luminance uniformity; 80-pin LQFP allows dense layout near panel driver ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog video interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9981KSTZ-95 | Rated for 95 MSPS max conversion rate; higher PLL jitter (980 ps p-p typ); uses output drive strength = 1. | Required for 1080i/1080p HDTV capture at full rate; not suitable where 80 MSPS suffices and lower jitter is prioritized. | Select AD9981KSTZ-95 only if system requires >80 MSPS pixel rates; AD9981KSTZ-80 offers better jitter performance at lower power. |
| ADV7842KBCZ | 12-bit, 165 MSPS HDMI receiver with integrated HDCP; no native analog RGB/YPbPr ADC; requires external sync processing. | Targets HDMI/DTV sources, not analog VGA/component; lacks auto-offset and internal clamp for analog signal conditioning. | Choose ADV7842KBCZ for digital HDMI input paths; AD9981KSTZ-80 remains optimal for legacy analog RGB/YPbPr acquisition. |
Compared with AD9981KSTZ-95, AD9981KSTZ-80 delivers lower PLL jitter and reduced power dissipation at the expense of maximum pixel rate; versus ADV7842KBCZ, it provides dedicated analog front-end features-auto-offset, clamp, and SOG slicing-unavailable in digital-receiver-focused ICs.
Availability
AD9981KSTZ-80 is available at Aetrix Electronics and suitable for advanced TV input processing, LCD monitor signal acquisition, HDTV set-top box video capture, and plasma display panel controller applications requiring stable component supply and long-term industrial availability.
Supply support for AD9981KSTZ-80 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 AD9981 belongs to Analog Devices' display interface product line, engineered specifically for high-fidelity digitization of analog RGB and YPbPr video in consumer and professional display systems.
FAQ
What is the maximum guaranteed conversion rate for AD9981KSTZ-80?
The AD9981KSTZ-80 is rated for a maximum guaranteed conversion rate of 80 MSPS, as confirmed in Table 1 of the Rev. 0 datasheet. This distinguishes it from the AD9981KSTZ-95 variant, which supports up to 95 MSPS. The 80 MSPS rating ensures reliable operation for XGA (1024×768@85 Hz) and 720p HDTV formats without derating.
Does AD9981KSTZ-80 support sync-on-green (SOG) input processing?
Yes, AD9981KSTZ-80 supports SOG input processing via dedicated SOGIN0 and SOGIN1 pins. It includes an internal high-speed comparator with programmable 8 mV-step threshold (default 128 mV above negative peak), enabling robust sync extraction from green-channel embedded signals commonly found in VGA sources.
Can AD9981KSTZ-80 operate with 1.8 V digital I/O voltage?
Yes, AD9981KSTZ-80 supports 1.8 V digital I/O operation: VDD (pins 26, 38, 52, 64) may be supplied at 1.8 V for compatibility with low-voltage FPGAs or ASICs, while maintaining full functionality of RED[9:0], GREEN[9:0], BLUE[9:0], DATACK, and HSOUT outputs.
How does the auto-offset feature function in AD9981KSTZ-80?
The auto-offset feature in AD9981KSTZ-80 automatically calibrates out DC offset differences between the red, green, and blue ADC channels during operation. It restores signal reference levels without host intervention, ensuring consistent color balance across varying input signal amplitudes and temperature drift.
Is AD9981KSTZ-80 pin-compatible with AD9981KSTZ-95?
Yes, AD9981KSTZ-80 and AD9981KSTZ-95 share identical 80-pin LQFP packaging, pinout, and footprint. They differ only in guaranteed maximum conversion rate (80 vs. 95 MSPS) and associated electrical specifications such as PLL jitter and power consumption - enabling drop-in replacement where 80 MSPS meets system requirements.
AD9981KSTZ-80 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 80-LQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Applications:
- Video
- Interface:
- Analog
- Voltage - Supply:
- 3.13V ~ 3.47V
- Supplier Device Package:
- 80-LQFP (14x14)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
AD9981KSTZ-80 FAQ
1.How can I place an order for AD9981KSTZ-80 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9981KSTZ-80 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD9981KSTZ-80 reliable?
The price and inventory of AD9981KSTZ-80 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9981KSTZ-80 is usually 5 days.
3.What payment methods are accepted for AD9981KSTZ-80?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9981KSTZ-80 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9981KSTZ-80?
AD9981KSTZ-80 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9981KSTZ-80 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD9981KSTZ-80?
For technical support, including AD9981KSTZ-80 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9981KSTZ-80 requirements.
6.How does Aetrix verify that AD9981KSTZ-80 is sourced from the original manufacturer or authorized distributors?
All AD9981KSTZ-80 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD9981KSTZ-80 meets industry standards.
7.What is the process for return or replacement of AD9981KSTZ-80?
All AD9981KSTZ-80 units undergo pre-shipment inspection (PSI). If there is an issue with AD9981KSTZ-80, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD9981KSTZ-80 part is unused and in its original packaging.
Return procedure for AD9981KSTZ-80:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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