Overview
The AD9985AKSTZ-140 is a comprehensive 8-bit, 140 MSPS (mega-samples per second) monolithic analog interface designed by Analog Devices Inc. This component is optimized for capturing RGB graphics signals from personal computers and workstations, making it ideal for applications requiring high-resolution display support. The AD9985AKSTZ-140 features a 140 MHz triple ADC, an on-chip PLL (Phase-Locked Loop), and programmable gain, offset, and clamp control, ensuring precise and flexible signal processing.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 8 | 8 | 8 | Bits |
| Differential Nonlinearity (25°C) | ±0.5 | +1.25/–1.0 | +1.35/–1.0 | LSB |
| Integral Nonlinearity (25°C) | ±0.5 | ±1.85 | ±2.0 | LSB |
| Analog Input Voltage Range | 0.5 | 1.0 | V p-p | |
| Gain Tempco (25°C) | 100 | ppm/°C | ||
| Input Bias Current (25°C) | 1 | µA | ||
| Supply Voltage (VD, VDD, PVD) | 3.15 | 3.3 | 3.45 | V |
| Supply Current (VD, VDD, PVD) at 25°C | 132 | mA (VD), 19 mA (VDD), 8 mA (PVD) | ||
| Total Power Dissipation | 525 | 760 | mW | |
| Analog Bandwidth (Full Power, 25°C) | 300 | MHz | ||
| Transient Response (25°C) | 2 | ns |
Key Features
- 140 MSPS encode rate capability and full power analog bandwidth of 300 MHz, supporting resolutions up to SXGA (1280 × 1024 at 75 Hz).
- On-chip PLL generates a pixel clock from the Hsync input, with pixel clock output frequencies ranging from 12 MHz to 140 MHz.
- Programmable gain, offset, and clamp control.
- Full sync processing for composite sync and sync-on-green applications.
- Variable analog input bandwidth control and selectable input filtering.
- Three-state CMOS outputs can be powered from 2.5 V to 3.3 V.
- Fully programmable via a 2-wire serial interface.
- Fabricated in an advanced CMOS process, with a space-saving 80-lead LQFP surface-mount Pb-free plastic package.
Applications
The AD9985AKSTZ-140 is primarily used in applications requiring the capture and processing of high-resolution RGB graphics signals. This includes:
- Flat panel displays.
- Personal computers and workstations.
- High-resolution display systems.
- Video processing and capture systems.
Q & A
- What is the resolution and sampling rate of the AD9985AKSTZ-140? The AD9985AKSTZ-140 has a resolution of 8 bits and a sampling rate of up to 140 MSPS.
- What is the analog bandwidth of the AD9985AKSTZ-140? The analog bandwidth is 300 MHz.
- How is the pixel clock generated in the AD9985AKSTZ-140? The pixel clock is generated by the on-chip PLL from the Hsync input.
- What are the power supply requirements for the AD9985AKSTZ-140? The component requires a 3.3 V power supply for VD, VDD, and PVD.
- What is the temperature range for the AD9985AKSTZ-140? The component is specified over the –40°C to +85°C temperature range.
- What type of package does the AD9985AKSTZ-140 come in? It comes in an 80-lead LQFP surface-mount Pb-free plastic package.
- Does the AD9985AKSTZ-140 support sync-on-green applications? Yes, it supports full sync processing for composite sync and sync-on-green applications.
- How is the AD9985AKSTZ-140 programmed? It is fully programmable via a 2-wire serial interface.
- What are the typical supply currents for the AD9985AKSTZ-140? The typical supply currents are 132 mA for VD, 19 mA for VDD, and 8 mA for PVD at 25°C.
- What is the transient response time of the AD9985AKSTZ-140? The transient response time is 2 ns at 25°C.
