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ADI公司的ADA4433-1是全差分SD視頻濾波放大器,5階低通視頻濾波器,具有輸出電池短路保護9STB)和對地短路保護(STG)以及極好的視頻特性和低功耗,輸出過壓保護高達18V.0.1 B平坦度到3MHz,-3 dB帶寬10MHz,27MHz的抑制為45dB,主要用在汽車后視照相機,汽車視頻電控單元(ECU),視頻監視系統.本文介紹了ADA4432-1主要特性,方框圖,應用配置電路圖,和ADV7391/ADV7393視頻編碼器的應用電路圖,DC耦合電路圖以及ADA4433-1評估板主要特性,電路圖和材料清單. ADA4433-1: Fully Differential SD Video Filter Amplifier with Output Short-to-Battery Protection The ADA4432-1 (single-ended output) and ADA4433-1 (differential output) are fully integrated video reconstruction filters that combine overvoltage protection (short-to-battery [STB] protection) and short-to-ground (STG) protection on the outputs, with excellent video specifications and low power consumption. The combination of STB protection and robust ESD tolerance allows the ADA4432-1 and the ADA4433-1 to provide superior protection in the hostile automotive environment. The ADA4432-1 is a single-ended input/single-ended output video filter capable of driving long back-terminated cables. The ADA4433-1 is a fully differential video filter that can be used as a fully differential input to a differential output or as a single-ended input to a differential output, allowing it to easily connect to both differential and single-ended sources. It is capable of driving twisted pair or coaxial cable with minimal line attenuation. Differential signal processing reduces the effects of ground noise, which can plague ground referenced systems. The ADA4433-1 is ideal for differential signal processing (gain and filtering) throughout the signal chain, simplifying the conversion between single-ended and differential components. The short-to-battery protection integrated into the ADA4432-1 and ADA4433-1 protects against both dc and transient overvoltage events, caused by an accidental short to a battery voltage up to 18 V. The Analog Devices, Inc., short-to-battery protection eliminates the need for large output coupling capacitors and other complicated circuits used to protect standard video amplifiers, saving space and cost. The ADA4432-1 and ADA4433-1 feature a high-order filter with −3 dB cutoff frequency response at 10 MHz and 45 dB of rejection at 27 MHz. The ADA4432-1 and ADA4433-1 feature an internally fixed gain of 2 V/V. This makes the ADA4432-1 and ADA4433-1 ideal for SD video applications, including NTSC and PAL. The ADA4432-1 and ADA4433-1 operate on single supplies as low as 2.6 V and as high as 3.6 V while providing the dynamic range required by the most demanding video systems. The ADA4432-1 and ADA4433-1 are offered in an 8-lead, 3 mm × 3 mm LFCSP package. The ADA4432-1 is also available in a 6-lead SOT-23 package. All are rated for operation over the wide automotive temperature range of −0℃ to +125℃. ADA4432-1主要特性: Qualified for automotive applications Output overvoltage (short-to-battery) protection up to 18 V Short-to-battery output flag for wire diagnostics Output short-to-ground protection Fifth-order, low-pass video filter 0.1 dB flatness to 3 MHz −3 dB bandwidth of 10 MHz 45 dB rejection at 27 MHz Ultralow power-down current: 13.5 μA typical Low quiescent current 7.6 mA typical (ADA4432-1) 13.2 mA typical (ADA4433-1) Low supply voltage: 2.6 V to 3.6 V Small packaging 8-lead, 3 mm × 3 mm LFCSP 6-lead SOT-23 (ADA4432-1 only) Wide operating temperature range: −0℃ to +125℃ ADA4432-1應用: Automotive rearview cameras Automotive video electronic control units (ECUs) Surveillance video systems 
圖1.ADA4432-1方框圖
圖2.ADA4432-1應用案例配置電路圖
圖3.ADA4432-1和ADV7391/ADV7393視頻編碼器應用電路圖
圖4.ADA4432-1視頻濾波器和ADA4830-1差分放大器的DC耦合電路圖 ADA4433-1評估板 Evaluation Board for the ADA4433-1, Fully Differential Video Filter Amplifier Offered in 8-Lead LFCSP Evaluation Board for the ADA4433-1, Fully Differential Video Filter Amplifier Offered in 8-Lead LFCSP ADA4433-1評估板主要特性: Fully assembled and tested Enables quick customer evaluation Edge-mounted SMA connector provisions Easy connection to test equipment and other circuits
圖5.ADA4433-1評估板外形圖
圖6.ADA4433-1BCP-EBZ評估板電路圖 ADA4433-1BCP-EBZ評估板材料清單:
詳情請見: 
ADA4432-1_4433-1.pdf
(1.43 MB)
和
UG-425.pdf
(208.14 KB)
來源：網絡 |
