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LMH1980 bảng dữ liệu(PDF) 5 Page - Texas Instruments |
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LMH1980 bảng dữ liệu(HTML) 5 Page - Texas Instruments |
5 / 22 page VIN CSOUT HSOUT BPOUT VSOUT OEOUT COLOR BURST START OF FIELD 1 ODD FIELD LINE # 1 3 4 5 6 7 9 10 11 525 2 8 3H H 3H 3H TVSOUT = 3H H ½ H VERTICAL SYNC SERRATION TP2 Odd/Even Field Output 2 1 TP3 Burst/Back Porch Output 2 1 TP4 Composite Sync Output 2 1 TP5 Vertical Sync Output 2 1 TP6 Horizontal Sync Output 2 1 R6 100: R7 100: R8 100: R4 100: R5 100: 7 6 8 9 10 OEOUT BPOUT CSOUT VSOUT HSOUT LMH1980 4 5 3 2 1 REXT GND VCC VIN HD U2 R2 10 k: 1% C5 0.1 PF C3 0.1 PF C4 10 PF R3 10 k: R10 100: TP1 HD Detect Flag Output 2 1 J2 GND TP7 GND 1 1 J1 VCC TP8 VCC 1 1 R9 100: C2 560 pF C1 *OPT Q1 MMBT3904 R1 75: BNC J3 LMH1980 www.ti.com SNLS263A – JULY 2007 – REVISED MARCH 2013 LMH1980 Test Circuit Figure 2. Test Circuit The LMH1980 test circuit is shown in Figure 2. The video generator should provide a clean, low-noise video input signal with minimal sync pulse overshoot over 75 Ω coaxial cable, which should be impedance-matched with a 75 Ω load termination resistor to prevent unwanted signal distortion. The output waveforms should be monitored using a low-capacitance probe on an oscilloscope with at least 500 MHz bandwidth. See PCB LAYOUT CONSIDERATIONS for more information about signal and supply trace routing and component placement. Also, refer to the “LMH1980 Evaluation Board Instruction Manual” Application Note (AN-1618 [SNLA096]). SDTV Vertical Interval Timing Diagrams (NTSC, PAL, 480I, 576I) Figure 3. NTSC Odd Field Vertical Interval Copyright © 2007–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LMH1980 |
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Mô tả tương tự - LMH1980 |
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