Overview
The AD9883A, specifically the AD9883AKST-140 model from Analog Devices Inc., is a comprehensive 8-bit, 140 MSPS monolithic analog interface. This device is optimized for capturing RGB graphics signals from personal computers and workstations. It features a high-performance CMOS process, supporting resolutions up to SXGA (1280 x 1024 at 75 Hz) with a full-power analog bandwidth of 300 MHz. The AD9883A includes all necessary input buffering, signal DC restoration (clamping), offset and gain adjustment, pixel clock generation, and output data formatting, making it a fully integrated solution for digitizing analog RGB signals.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 8 | 8 | 8 | Bits |
| Maximum Conversion Rate | - | - | 140 | MSPS |
| Analog Input Range | 0.5 | - | 1.0 | V p-p |
| Analog Bandwidth | - | - | 300 | MHz |
| Power Supply Voltage (VD) | 3.0 | 3.3 | 3.6 | V |
| Power Supply Voltage (VDD) | 2.2 | 3.3 | 3.6 | V |
| Power Dissipation (Typical) | - | 500 | - | mW |
| Operating Temperature Range | -40 | - | 85 | °C |
| 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 |
Key Features
- Full sync processing and sync detect for hot plugging.
- Midscale clamping and power-down mode.
- Programmable gain, offset, and clamp control via a 2-wire serial interface.
- Internal 1.25 V reference and PLL.
- Support for 4:2:2 output format mode.
- Low power consumption: 500 mW typical.
- Industrial temperature range operation: -40°C to +85°C.
- All digital inputs are 3.3 V CMOS levels and 5 V tolerant.
Applications
- RGB graphics processing.
- LCD monitors and projectors.
- Plasma display panels.
- Scan converters.
- Microdisplays.
- Digital TV.
- Computer interface for HDTV monitors.
- Front end for high-performance video scan converters.
Q & A
- What is the maximum conversion rate of the AD9883A?
The AD9883A has a maximum conversion rate of 140 MSPS. - What is the analog input range of the AD9883A?
The analog input range is from 0.5 V to 1.0 V p-p. - What is the power supply voltage range for the AD9883A?
The power supply voltage range is from 3.0 V to 3.6 V for VD and from 2.2 V to 3.6 V for VDD. - What is the typical power dissipation of the AD9883A?
The typical power dissipation is 500 mW. - What is the operating temperature range of the AD9883A?
The operating temperature range is from -40°C to +85°C. - Does the AD9883A support hot plugging?
Yes, it supports hot plugging with sync detect. - How is the gain, offset, and clamp control adjusted in the AD9883A?
These are adjusted via a 2-wire serial interface. - What is the output format mode supported by the AD9883A?
The AD9883A supports 4:2:2 output format mode. - Is the AD9883A suitable for high-resolution graphics?
Yes, it supports resolutions up to SXGA (1280 x 1024 at 75 Hz). - Are the digital inputs of the AD9883A 5 V tolerant?
Yes, all digital inputs are 3.3 V CMOS levels and 5 V tolerant.
