Overview
The OPA361AIDCKR is a high-speed video amplifier produced by Texas Instruments, optimized for 3V portable video applications. It is specifically designed to be compatible with the video encoders embedded in Texas Instruments’ OMAP2420 and DaVinci processors, as well as other application processors with 0.5VPP video output. The amplifier features an internal gain setting, a 2-pole video-DAC reconstruction filter, and a TV-detection capability, making it ideal for space-sensitive and power-efficient video applications.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Package | SOT-SC70 (DCK) | - |
| Pins | 6 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Supply Voltage | 2.5V to 3.3V | V |
| Quiescent Current | 5.3mA | mA |
| Shutdown Current | < 1.5µA | µA |
| Internal Gain | 5.2V/V | - |
| Input Common-Mode Range | GND to 0.55V (at 3.3V supply) | V |
| Output Swing | Within 5mV of GND and 250mV to V+ | V |
| Filter Type | 2-pole Sallen-Key filter | - |
| Filter Cutoff Frequency | 9MHz | Hz |
Key Features
- Excellent Video Performance: Optimized for high-quality video transmission.
- Internal Gain Setting: Internal gain setting resistors (G = 5.2V/V) reduce the need for external components.
- TV-Detection Support: Facilitates automatic start/stop of video transmission when a TV is connected.
- 2-Pole Reconstruction Filter: A Sallen-Key topology filter with a 9MHz cutoff frequency for DAC signal reconstruction.
- DC-Coupled Input and Output: Allows for direct connection to video DACs and loads without the need for external capacitors.
- Integrated Level Shifter: Prevents output saturation and sync-pulse clipping.
- Rail-to-Rail Output: Output swings within 5mV of GND and 250mV to V+.
- Low Quiescent Current: 5.3mA in normal operation and less than 1.5µA in shutdown mode.
- Compact Package: Available in a tiny 2mm x 2.1mm SC70-6 package.
- RoHS Compliant: Meets environmental standards.
Applications
- Camera Phones: Ideal for portable video applications in camera phones and other handheld devices.
- Portable Video Devices: Suitable for any device requiring high-quality video transmission with low power consumption.
- Embedded Systems: Compatible with OMAP242x and DaVinci processors, making it a good fit for various embedded systems.
Q & A
- What is the primary application of the OPA361AIDCKR?
The OPA361AIDCKR is primarily used in portable video applications, such as camera phones and other handheld devices.
- What is the internal gain setting of the OPA361AIDCKR?
The internal gain setting of the OPA361AIDCKR is 5.2V/V.
- Does the OPA361AIDCKR support TV-detection?
Yes, the OPA361AIDCKR supports TV-detection, which helps automate the start/stop operation of video transmission when a TV is connected.
- What type of filter is integrated into the OPA361AIDCKR?
The OPA361AIDCKR includes a 2-pole Sallen-Key filter with a 9MHz cutoff frequency.
- What is the quiescent current of the OPA361AIDCKR in normal operation and shutdown mode?
In normal operation, the quiescent current is 5.3mA, and in shutdown mode, it is less than 1.5µA.
- What is the operating temperature range of the OPA361AIDCKR?
The operating temperature range is -40°C to 125°C.
- Is the OPA361AIDCKR RoHS compliant?
Yes, the OPA361AIDCKR is RoHS compliant.
- What is the package type and size of the OPA361AIDCKR?
The OPA361AIDCKR is available in a SOT-SC70 (DCK) package, measuring 2mm x 2.1mm.
- Does the OPA361AIDCKR require external capacitors for the output?
No, the OPA361AIDCKR does not require external capacitors for the output due to its DC-coupled output design.
- How does the TV-detection feature work in the OPA361AIDCKR?
The TV-detection feature works by briefly turning off the OPA361AIDCKR during the first vertical sync pulse to detect if a TV is connected. A simple pull-up resistor to the processor logic supply is used to read the logic level and determine if a video load is connected.
