ADA4431-1: Ultralow Power SD Video Filter with Load Detection
The ADA4431-1 is a fully integrated video reconstruction filter that combines excellent video specifications with low power consumption, making it ideal for portable video filtering applications. The ADA4431-1 is able to detect whether a video load is present at the output, powering down the device when the load is disconnected.
The ADA4431-1 operates on single supplies as low as 2.5 V while providing the dynamic range required by the most demanding video systems. The on-board charge pump provides a virtual negative supply, allowing the video signal to be dc-coupled and the black level to be set to ground, while the sync passes cleanly at 300 mV below ground.
When operating with the charge pump off, the ADA4431-1 provides a dc offset to keep the sync tip approximately 100 mV above ground. In addition, the part features SAG correction, which permits the use of smaller capacitors in applications with ac-coupled outputs.
The ADA4431-1 is packaged in a low profile 16-lead LFCSP and operates in the industrial temperature range of -40°C to +85°C.
产品应用领域 Applications
- Portable media players
- Portable gaming consoles
- Cell phones
- Digital still cameras
- Portable DVD players
- Portable video cameras
ADA4431-1 特点
- Third-order, low-pass video filter 1 dB flatness out to 6 MHz 27 dB rejection at 27 MHz
- Low quiescent current: 4.7 mA typical
- Low power-down current: 24 μA typical
- Load detection capability
- SAG correction Allows use of smaller capacitors in ac-coupled outputs
- Low supply voltage: 2.5 V to 3.6 V
- Charge pump Creates a negative voltage from single positive supply Allows capless output coupling with no dc offset
- Rail-to-rail output
- High input-to-output isolation in disabled state 89 dB @ 1 MHz
- Small package 3 mm × 3 mm LFCSP Low 0.55 mm package height
- Wide operating temperature range: -40°C to +85°C
ADA4431-1 功能框图
ADA4431-1 技术指标
| Standards | SD | Operating Temp Range | -40 to +85 |
| Supply Current | 4.7mA | Package | 24-ld LFCSP |
| Pos Supply | +2.5V to +3.6V | Resolution | 480i |
| Variable Gain | 2x |
ADA4431-1 订购指南
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| ADA4431-1YCPZ-R2 | 量产 | 16 ld LFCSP 3x3x.55(1.70 EP) | 16 | 工业 |
| ADA4431-1YCPZ-R7 | 量产 | 16 ld LFCSP 3x3x.55(1.70 EP) | 16 | 工业 |
| ADA4431-1YCPZ-RL | 量产 | 16 ld LFCSP 3x3x.55(1.70 EP) | 16 | 工业 |