TSH345 STMicroelectronics, TSH345 Datasheet

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... The TSH345 is a triple single-supply video buffer featuring an internal gain and selectable filtering for HD and SD video outputs on 75 Ω video lines. The TSH345 is ideal to drive YC, CVBS, YUV, YPbPr or RGB signals from video DAC outputs. The main advantage of this circuit is its input DC level shifter. It allows driving video signals on 75 Ω ...

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... All voltage values, except differential voltage, are with respect to network terminal. Table 2. Operating conditions Symbol V Power supply voltage CC 1. Tested in full production with +5 V single power supply. 2/23 Parameter = 25° C) for T = 150° C amb j Parameter TSH345 Value Unit 6 V 2.5 V -40 to +85 °C -65 to +150 °C 150 °C °C ° ...

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... TSH345 2 Electrical characteristics Table 3. Electrical characteristics at V (unless otherwise specified) Symbol DC performance Output DC shift -40° C < T Input bias current amb -40° C < T Input resistance Input capacitance Total supply current (3 x operators load, input to GND CC -40° ...

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... Ω IN < +85° C amb = +5 V single supply 25°C amb Min. Typ. Max. = 150 Ω 150 Ω 0.5 11 0.38 0 440 690 480 5 5 0.9 0.3 TSH345 Unit MHz dB MHz ° nV/√ Hz µA µs µ ...

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... V single supply ( Filtering for high definition (HD Filtering for progressive video (PV Filtering for standard definition (SD) 1 Standby TSH345 in standby mode = +5 V single supply Electrical characteristics = 25°C amb Settings = 25°C amb Settings Video1 selected Video2 selected ...

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... Figure 4. 0 Vcc=5V -10 F=10MHz -20 HD filter Load=150 -30 -40 -50 -60 -70 -80 -90 -100 2.5 3.0 3.5 4.0 0.0 Figure 6. 0 Vcc=5V -10 F=10MHz PV filter -20 Load=150 -30 -40 -50 -60 -70 -80 -90 -100 2.5 3.0 3.5 4.0 0.0 Gain flatness SD Ω 1M Frequency (Hz) Distortion 10 MHz (HD) Ω HD2 HD3 0.5 1.0 1.5 2.0 2.5 3.0 Output Amplitude (Vp-p) Distortion 10 MHz (PV) Ω HD2 HD3 0.5 1.0 1.5 2.0 2.5 3.0 Output Amplitude (Vp-p) TSH345 HD PV 10M 3.5 4.0 3.5 4.0 ...

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... TSH345 Figure 7. Distortion 1 MHz (SD filter) 0 Vcc=5V -10 F=1MHz SD filter -20 Ω Load=150 -30 -40 -50 HD2 -60 -70 -80 HD3 -90 -100 0.0 0.5 1.0 1.5 2.0 Output Amplitude (Vp-p) Figure 9. Gain vs. input amplitude 2.10 Vcc=5V Ω Load=150 2.05 2.00 1.95 1.90 0.0 0.2 0.4 0.6 0.8 Vin (Vp-p) Figure 11. Output vs input amplitude 5.0 Vcc=5V 4.5 Ω Load=150 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 Output DCshift 0.0 0.0 0.2 0.4 0.6 0.8 1.0 Vin (V) Figure 8. 1000 SD 100 2.5 3.0 3.5 4.0 100 Figure 10. Channel crosstalk vs. frequency ...

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... Vcc=5V no Load - Temperature (°C) Vcc=5V Ω Load=150 PV, f=54MHz HD, f=74.25MHz - Temperature (°C) Vcc=5V Ω Load=150 - Temperature (°C) TSH345 60 80 SD, f=27MHz ...

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... TSH345 Figure 19. Standby current vs. temperature 180 Vcc=5V no Load 170 160 150 140 130 120 -40 - Temperature (°C) Figure 21. Isource vs. temperature 120 110 100 Vcc=5V 50 -40 - Temperature (°C) Figure 23. VOL vs. temperature Vcc=5V Ω Load=150 30 -40 ...

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... Electrical characteristics Figure 25. Gain vs. temperature 2.20 2.15 2.10 2.05 2.00 1.95 1.90 Vcc=5V 1.85 Ω Load=150 1.80 -40 - Temperature (°C) 10/ TSH345 ...

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... A coil can be added in order to better reject the noise from the supply and to prevent current peaks as much as possible. Figure 26. Circuit for power supply bypassing ). C must be placed as close as possible to the IC pin Coil TSH345 B 8 AM00816 Electrical characteristics ) greater than 10 µ 11/23 ...

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... Figure 28. Power supply noise rejection 12/23 T-bias + Coil TSH345 50 0 Vcc=5V(dc)+0.2Vp-p(ac) Decoupling capacitor: 10µF+100nF -10 Ω Load=150 Δ Noise rejection=20 log ( VCC/ -20 -30 no coil -40 -50 -60 coil=560µH -70 -80 10k 100k 1M Frequency (Hz AGILENT 4395A 50 A AM00817 Δ Vout) 10M 100M TSH345 ...

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... TSH345 Using the TSH345 to drive YC, CVBS, YUV, YPbPr and RGB video components 3 Using the TSH345 to drive YC, CVBS, YUV, YPbPr and RGB video components Figure 29. Implementation of the video driver on output video DACs Reconstruction filtering Y Video LPF DAC 1 Vpp Reconstruction filtering Pb Video LPF DAC 0 ...

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... Using the TSH345 to drive YC, CVBS, YUV, YPbPr and RGB video components Figure 30. Synchronization details (example for a black picture (2t) HD 300 mV 590 ns ( c.t ip 160 ns SD 300 mV 4 Figure 31. HD video signal 300 mV DAC’s offset GND (DAC’s offset on STi7200 = 28 mV) ...

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... TSH345 Using the TSH345 to drive YC, CVBS, YUV, YPbPr and RGB video components Figure 32. Standard video signal 300 mV DAC’s offset GND (DAC’s offset on STi7200 = 28 mV) Video contents MHz 1.3 Vp-p (+/- 5 %) AM00821 15/23 ...

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... DAC Pr,R,C DAC The TSH345 is used to drive either high-definition video signals MHz or progressive and interlaced standard definition video signals on 75-Ω video lines. It can drive a large panel of signals such as YC and CVBS, YUV, YPbPr and RGB, where the bottom of the signal (the synchronization tip in the case of Y and CVBS signals) is close to zero volts. An internal input DC value is added to the video signal in order to shift the bottom from GND ...

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... TSH345 Using the TSH345 to drive YC, CVBS, YUV, YPbPr and RGB video components 3.1 Output capacitor The output can be either DC-coupled or AC-coupled. The output can be directly connected to the line via a 75-Ω resistor (see any DC components in the load. Assuming the load is 150 Ω coupling capacitor of 220 µF can be used to provide a very low cut-off frequency close (see Figure 34 ...

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... Package information 4 Package information In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ® ECOPACK trademark. 18/23 TSH345 ® ...

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... TSH345 4.1 SO-14 package information Figure 36. SO-14 package mechanical drawing Table 6. SO-14 package mechanical data Ref ddd Note: D and F dimensions do not include mold flash or protrusions. Mold flash or protrusions must not exceed 0.15 mm. Dimensions Millimeters Min. Typ. Max. 1.35 1.75 0.10 0.25 1.10 1.65 0.33 0.51 0.19 0.25 8.55 8.75 3.80 4.0 1.27 5.80 6.20 0.25 0.50 0.40 1.27 0.10 Package information Inches Min ...

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... Dimensions Millimeters Min. Typ. Max. 1.20 0.05 0.15 0.80 1.00 1.05 0.19 0.30 0.09 0.20 4.90 5.00 5.10 6.20 6.40 6.60 4.30 4.40 4.50 0.65 0.45 0.60 0.75 1.00 0° 8° 0.10 TSH345 Inches Min. Typ. Max. 0.047 0.002 0.004 0.006 0.031 0.039 0.041 0.007 0.012 0.004 0.0089 0.193 0.197 0.201 0.244 0.252 0.260 0.169 0.173 0.176 0.0256 0.018 0.024 0.030 0.039 0° 8° 0.004 ...

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... TSH345 5 Ordering information Table 8. Order codes Part number TSH345ID TSH345IDT TSH345IPT Temperature Package range SO-14 -40°C to +85°C TSSOP14 Ordering information Packing Marking Tube TSH345I Tape & reel TSH345I Tape & reel TSH345I 21/23 ...

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... Revision history 6 Revision history Table 9. Document revision history Date 29-May-2007 18-Dec-2008 22/23 Revision 1 Initial release. Added curves in Chapter 2: Electrical 2 Added all test limits in Changes characteristics. Chapter Table 3. TSH345 ...

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... TSH345 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...