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| TSH340 320MHz Single Supply Video Buffer with Low In/Out Rail Bandwidth: 320MHz Single supply operation down to 3V Low input & output rail Very low harmonic distortion Slew rate: 780V/s Voltage input noise: 7nV/Hz Specified for 150 and 100 loads Internal gain of 6dB Compatible with the PCB layout of a single op-amp Tested on 5V power supply Data min. and max. are tested during production Pin Connections (top view) OUT 1 GND 2 IN 3 SOT23-5 5 +VCC 4 NC Description The TSH340 is a single supply video buffer featuring an internal gain of 6dB and a large bandwidth of 320MHz for only 9.8mA of quiescent current. An advantage of this circuit is its input and output negative rail feature, which is very close to GND in single supply. This rail is tested and guaranteed during production at 60mV maximum from GND on a 150 load. This allows a good output swing which fits perfectly when driving a video signal on a 75 video line. Chapter 5 of this datasheet gives technical support when using the TSH340 as a driver for video DAC output on a video line. In particular, this chapter focuses on applying a video signal DC shift to avoid any clamping of the synchronization tip. The TSH340 is available in tiny SOT23-5 and SO8 plastic packages. NC 1 NC 2 IN 3 GND 4 SO8 8 NC 7 +Vcc 6 OUT 5 NC Applications High-end video systems High Definition TV (HDTV) Broadcast and graphic video Multimedia products Order Codes Part Number TSH340ILT TSH340ID TSH340IDT Temperature Range -40C to +85C Package SOT23-5 SO-8 Packaging Tape & Reel Tube Tape & Reel Marking K306 TSH340I TSH340I April 2005 Revision 2 1/13 TSH340 Absolute Maximum Ratings 1 Absolute Maximum Ratings Table 1. Key parameters and their absolute maximum ratings Symbol VCC Vin Toper Tstd Tj Rthjc Supply voltage 1 2 Parameter Value 6 -0.2 to +3 -40 to +85 -65 to +150 150 80 75 250 175 500 715 2 1.5 200 Unit V V C C C C/W Input Voltage Range Operating Free Air Temperature Range Storage Temperature Maximum Junction Temperature Thermal Resistance Junction to Case SOT23-5 SO8 Thermal Resistance Junction to Ambient Area SOT23-5 SO8 Maximum Power Dissipation (@Ta=25C) for Tj=150C SOT23-5 SO8 CDM: Charged Device Model HBM: Human Body Model MM: Machine Model Rthja C/W Pmax. mW kV kV V ESD 1) 2) All voltage values, except differential voltage, are with respect to network terminal. The magnitude of input and output voltage must never exceed VCC +0.3V. Table 2. Operating conditions Symbol VCC Vicm 1) Parameter Power Supply Voltage Common Mode Input Voltage Value 3 to 5.5 -0.4 to 3 1 Unit V V Tested in full production at 0V/5V single power supply 2/13 Electrical Characteristics TSH340 2 Electrical Characteristics Table 3. VCC = +5V, Tamb = 25C (unless otherwise specified) Symbol DC Performance VOS Iib PSR ICC G Rin Cin Output Offset Voltage1 Input Bias Current no Load, Tamb -40C < Tamb < +85C Tamb, Vicm=0.6V -40C < Tamb < +85C Power Supply Rejection Ratio 20 log (Vcc/Vout) Total Supply Current DC Voltage Gain Input Resistance Input Capacitance no Load, Vin=100mV RL = 150 Tamb Tamb 1.95 Vcc=200mVp-p, F=1MHz -30 -5 -6.8 6 7.2 -90 9.8 2 8 3.2 12.8 2.05 16 +30 mV A dB mA V/V M pF Parameter Test Condition Min. Typ. Max. Unit Dynamic Performance and Output Characteristics -3dB Bandwidth Bw Gain Flatness @ 0.1dB Full Power Bandwidth Slew Rate High Level Output Voltage Low Level Output Voltage Output Short Circuit Current (Isource) IOUT Output Current Noise and Distortion eN iN HD2 HD3 1) Small Signal Vout=20mVp Vicm=0.6V, RL = 150 Small Signal Vout=20mVp Vicm=0.6V, RL = 150 Vicm=0.6V, VOUT = 2Vp-p, RL = 150 Vicm=0.6V, VOUT = 2Vp-p, RL = 150 RL = 150 RL = 150 Tamb -40C < Tamb < +85C Vout=2Vp, Tamb 190 320 MHz 63 FPBW SR VOH VOL 130 200 780 MHz V/s V 60 mV mA mA 3.7 3.9 40 100 90 45 87 Equivalent Input Noise Voltage Equivalent Input Noise Current 2nd Harmonic Distortion 3rd Harmonic Distortion F = 100kHz F = 100kHz VOUT = 2Vp-p, RL = 150 F= 10MHz, VOUT = 1Vp-p, RL = 150 F= 10MHz, 7 1.5 -85 -75 nV/Hz pA/Hz dBc dBc Output Offset Voltage is determined from the following expression: VOUT =G.VIN+VOS 3/13 TSH340 Figure 1. Frequency response 16 14 12 10 8 6 4 2 0 -2 -4 -6 -8 -10 -12 -14 -16 1M Electrical Characteristics Figure 4. Frequency response on capa-load 20 Frequency Response (dB) 10 C=10pF Riso=22 C=1pF Riso=0 Gain (dB) 0 C=22pF Riso=22 C=47pF Riso=15 Vcc=5V Load=Riso + C//1k (to ground) C=0 Riso=0 100M -10 Vcc=5V Load=100 or 150 SO8 and SOT23-5 10M 100M -20 1M 10M Frequency (Hz) Frequency (Hz) Figure 2. Gain flatness - SOT23-5 7,0 6,8 6,6 6,4 Figure 5. Gain flatness - SO8 7,0 Load=150 6,8 6,6 6,4 Load=150 Gain (dB) Gain (dB) 6,2 6,0 5,8 5,6 5,4 5,2 5,0 1M 6,2 6,0 5,8 5,6 5,4 Load=100 Load=100 Vcc=5V 10M 100M 5,2 5,0 1M Vcc=5V 10M 100M Frequency (Hz) Frequency (Hz) Figure 3. Total input noise vs. frequency Figure 6. Positive and negative slew rate 3,0 non-inverting input in short-circuit Vcc=5V 2,5 Vcc=5V Load=100 or 150 Input Noise (nV/VHz) 100 Output Response (V) 2,0 SR+ 1,5 1,0 0,5 SR- 10 100 1k 10k 100k 1M 10M 0,0 -5ns -4ns -3ns -2ns -1ns 0s 1ns 2ns 3ns 4ns 5ns Frequency (Hz) Time (ns) 4/13 Electrical Characteristics Figure 7. Distortion on 100 load -30 -35 -40 -45 HD3 (30MHz) HD2 (30MHz) TSH340 Figure 10. Distortion on 150 load -30 -35 -40 -45 HD3 (30MHz) HD2 & HD3 (dBc) HD2 & HD3 (dBc) -50 -55 -60 -65 -70 -75 -80 -85 -90 -95 -100 0 -50 -55 -60 -65 -70 -75 -80 -85 HD3 (10MHz) HD2 (30MHz) HD2 (10MHz) HD3 (10MHz) 1 2 3 Vcc=5V Load=100 4 -90 -95 -100 0 1 2 3 HD2 (10MHz) Vcc=5V Load=150 4 Output Amplitude (Vp-p) Output Amplitude (Vp-p) Figure 8. Output lower rail vs. frequency 500 Figure 11. Output voltage swing vs. Vcc 5 Vcc=5V Load=100 or 150 400 4 Vout max (Vp-p) Vol (mV) 300 3 200 2 100 1 F=30MHz Load=100 or 150 3,25 3,50 3,75 4,00 4,25 4,50 4,75 5,00 0 10k 100k 1M 10M 100M 0 3,00 Frequency (Hz) Vcc (V) Figure 9. Output voltage swing vs. frequency 5 Figure 12. Quiescent current vs. vcc 20 no load 4 15 Vout max. (Vp-p) Icc (mA) Vcc=5V Load=100 or Load=150 10M 3 10 2 5 1 0 1M 0 1,5 2,0 2,5 3,0 3,5 4,0 4,5 5,0 Frequency (Hz) Vcc (V) 5/13 TSH340 Figure 13. Isource 0 -10 -20 -30 +5V VOH without load Electrical Characteristics Figure 16. Reverse isolation vs. frequency 0 -20 Isource (mA) -40 +3V Isource V 0V -50 -60 -70 -80 -90 -100 -110 -120 0,0 0,5 1,0 Gain (dB) -40 -60 -80 1,5 2,0 2,5 3,0 3,5 4,0 4,5 5,0 -100 1M Small Signal Vcc=5V Load=100 10M 100M 1G V (V) Frequency (Hz) Figure 14. Bandwidth vs. temperature 500 450 400 Figure 17. Voltage gain vs. temperature 2,05 2,04 2,03 2,02 Bw (MHz) Gain (dB) 350 300 250 200 2,01 2,00 1,99 1,98 1,97 150 100 -40 Vcc=5V Load=150 -20 0 20 40 60 80 1,96 1,95 -40 Output: short-circuit Vcc=5V -20 0 20 40 60 80 Temperature (C) Temperature (C) Figure 15. Output offset vs. temperature Figure 18. Ibias vs. temperature 7,0 0 6,5 6,0 5,5 -1 Vos (mV) -2 IBIAS (A) Vcc=5V Load=150 5,0 4,5 4,0 -3 -4 3,5 3,0 -40 Vcc=5V Load=150 -20 0 20 40 60 80 -5 -40 -20 0 20 40 60 80 Temperature (C) Temperature (C) 6/13 Electrical Characteristics Figure 19. Supply current vs. temperature 12 TSH340 11 ICC (mA) 10 9 8 Vcc=5V no Load -20 0 20 40 60 80 7 -40 Temperature (C) Figure 20. Output lower rail vs. temperature 0,10 0,08 Vcc=5V Load=150 VOL (V) 0,06 0,04 0,02 0,00 -40 -20 0 20 40 60 80 Temperature (C) Figure 21. Output higher rail vs. temperature 4,50 4,25 VOH (V) 4,00 3,75 Vcc=5V Load=150 3,50 -40 -20 0 20 40 60 80 Temperature (C) 7/13 TSH340 Evaluation Boards 3 Evaluation Boards An evaluation board kit optimized for high-speed operational amplifiers is available (order code: KITHSEVAL/STDL). The kit includes the following evaluation boards, as well as a CD-ROM containing datasheets, articles, application notes and a user manual: SOT23_SINGLE_HF BOARD: Board for the evaluation of a single high-speed op-amp in SOT23-5 package. SO8_SINGLE_HF: Board for the evaluation of a single high-speed op-amp in SO8 package. SO8_DUAL_HF: Board for the evaluation of a dual high-speed op-amp in SO8 package. SO8_S_MULTI: Board for the evaluation of a single high-speed op-amp in SO8 package in inverting and non-inverting configuration, dual and signle supply. SO14_TRIPLE: Board for the evaluation of a triple high-speed op-amp in SO14 package with video application considerations. Board material: 2 layers FR4 (r=4.6) epoxy 1.6mm copper thickness: 35m Figure 22: Evaluation kit for high speed op-amps 8/13 Power Supply Considerations TSH340 4 Power Supply Considerations Correct power supply bypassing is very important for optimizing performance in high-frequency ranges. Bypass capacitors should be placed as close as possible to the IC pins to improve high-frequency bypassing. A capacitor greater than 10F is necessary to minimize the distortion. For better quality bypassing, a capacitor of 10nF is added using the same implementation conditions. Bypass capacitors must be incorporated for both the negative and the positive supply. On the SO8_SINGLE_HF board, these capacitors are C8 and C6. Figure 23: Circuit for power supply bypassing +VCC + 10nF +VCC TSH340 GND 10microF 9/13 TSH340 Using the TSH340 to Drive Video Signals 5 Using the TSH340 to Drive Video Signals Figure 24. Implementation of the video driver on output video DACs Volt Video Signal 2.250V Volt 250mV +5V Video DAC 1Vpp Reconstruction Filtering time Video Signal 1.125V 125mV time LPF 6dB 75 75 Cable 75 2Vpp 1Vpp VOL(100MHz) = 180mV (Figure 8) To drive the video signal properly, the output of the driver must be at least equal to 250mV (assuming VOS and VOL variations). 1st solution: Set the video DAC 0-IRE output level to 125mV. White Level 100 IRE Image Content Black Level 30 IRE 300mV 1Vp-p 125mV 0V Synchronization Tip 0 IRE 2nd solution: Implementation of a DC component in the input of the driver. Volt Video Signal 2.250V Volt 250mV +5V 33uF Video DAC 1Vpp Reconstruction Filtering time Video Signal 1.125V 125mV time LPF 6dB 75 75 Cable 1k 2Vpp 75 1Vpp DC component =125mV 10/13 Package Mechanical Data TSH340 6 Package Mechanical Data 6.1 SO-8 package SO-8 MECHANICAL DATA DIM. A A1 A2 B C D E e H h L k ddd 0.1 5.80 0.25 0.40 mm. MIN. 1.35 0.10 1.10 0.33 0.19 4.80 3.80 1.27 6.20 0.50 1.27 0.228 0.010 0.016 TYP MAX. 1.75 0.25 1.65 0.51 0.25 5.00 4.00 MIN. 0.053 0.04 0.043 0.013 0.007 0.189 0.150 0.050 0.244 0.020 0.050 inch TYP. MAX. 0.069 0.010 0.065 0.020 0.010 0.197 0.157 8 (max.) 0.04 0016023/C 11/13 TSH340 6.2 SOT23-5L (5-pin) package Package Mechanical Data SOT23-5L MECHANICAL DATA mm. DIM. MIN. A A1 A2 b C D E E1 e e1 L 0.35 0.90 0.00 0.90 0.35 0.09 2.80 2.60 1.50 0 .95 1.9 0.55 13.7 TYP MAX. 1.45 0.15 1.30 0.50 0.20 3.00 3.00 1.75 MIN. 35.4 0.0 35.4 13.7 3.5 110.2 102.3 59.0 37.4 74.8 21.6 TYP. MAX. 57.1 5.9 51.2 19.7 7.8 118.1 118.1 68.8 mils 12/13 TSH340 7 Revision History Date 01 Jan. 2005 23 Mar. 2005 Revision 1 2 Description of Changes First release corresponding to Preliminary Data version of datasheet. Datasheet of mature, full-specification product. Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners (c) 2005 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 13/13 |
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