300MHz Single Supply Video Amplifier with Low In/Out Rail -IN -IN +IN +IN -VCC. Part Number Temperature Range Package Packaging Marking TSH341ILT

Transcription

1 3MHz Single Supply Video Amplifier with Low In/Out Rail Bandwidth: 3MHz Single supply operation down to 3V Low input & output rail Very low harmonic distortion Slew rate: 4V/µs Voltage Input noise: 7nV/ Hz Specified for 15Ω load and 1Ω load Tested on 5V power supply Data min. and max. are tested during production (Table 3) Description The is a single supply operational amplifier featuring a large bandwidth of 3MHz at unity gain for only 9.8mA of quiescent current. An advantage of this circuit is its low input and output rail feature which is very close to GND in single supply. This rail is tested and guaranteed during production at 6mV (max.) from GND on a 15Ω load. This allows a good output swing which fits perfectly when driving a video signal on a 75Ω video line. Chapter 5 gives technical support when using the 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 is available in the tiny SOT23-5 and SO8 plastic packages. Pin Connections (top view) OUT 1 -VCC 2 NC 1 -VCC 4 Applications VCC +IN 3 4 -IN SOT23-5 -IN 2 +IN 3 _ + SO8 8 NC 7 +VCC 6 OUT 5 NC High-end video systems High Definition TV (HDTV) Broadcast video Multimedia products Order Codes Part Number Temperature Range Package Packaging Marking ILT SOT23-5 Tape & Reel K37 ID -4 C to +85 C Tube H341I SO-8 IDT Tape & Reel H341I March 25 Revision 2 1/13

2 Absolute Maximum Ratings 1 Absolute Maximum Ratings Table 1. Key parameters and their absolute maximum ratings Symbol Parameter Value Unit V CC Supply voltage 1 6 V Vid Differential Input Voltage 2 +/-.5 V V in Input Voltage Range to +3 V T oper Operating Free Air Temperature Range -4 to +85 C T std Storage Temperature -65 to +15 C T j Maximum Junction Temperature 15 C R thjc R thja P max. ESD Thermal Resistance Junction to Case SOT23-5 SO8 Thermal Resistance Junction to Ambient Area SOT23-5 SO8 Maximum Power Dissipation (@Ta=25 C) for Tj=15 C SOT23-5 SO8 CDM: Charged Device Model HBM: Human Body Model MM: Machine Model Output Short Circuit C/W C/W mw kv kv V 1) All voltage values, except differential voltage are with respect to network terminal. 2) Differential voltage are non-inverting input terminal with respect to the inverting input terminal. 3) The magnitude of input and output voltage must never exceed V CC +.3V. 4) An output current limitation protects the circuit from transient currents. Short-circuits can cause excessive heating. Destructive dissipation can result from short circuit on amplifiers. Table 2. Operating conditions Symbol Parameter Value Unit V CC Power Supply Voltage 3 to V Vicm Common Mode Input Voltage -.4 to 3 V 1) Tested in full production at V/5V single power supply 2/13

3 Electrical Characteristics 2 Electrical Characteristics Table 3. V CC = +5V, T amb = 25 C (unless otherwise specified) Symbol Parameter Test Condition Min. Typ. Max. Unit DC Performance Input Offset Voltage T amb, V icm =.6V V io mv -4 C < T amb < +85 C -5 V io V io drift vs. Temperature -4 C < T amb < +85 C -3 µv/ C Input Bias Current T amb, V icm =.6V 6 16 I ib µa -4 C < T amb < +85 C 7.2 A VD Open Loop Gain V OUT =2V, RL=15Ω 7 1 db CMR SVR Common Mode Rejection Ratio 2 log ( V icm / V io ) Supply Voltage Rejection Ratio 2 log ( V cc / V io ) V icm = 2V C < T amb < +85 C -83 V cc =4V to 5V, V icm =.6V C < T amb < +85 C -84 PSR Power Supply Rejection Ratio 2 log ( V cc / V out ) V cc =2mVp-p, F=1MHz -77 db R IN Input Resistance 8.2 MΩ C IN Input Capacitance 3.5 pf ICC Total Supply Current No Load, V icm =.6V ma Dynamic Performance and Output Characteristics Bw -3dB Bandwidth Gain Small Signal V OUT =2mVp V icm =.6V, RL=15Ω Gain=+1 Gain=+2 9 Small Signal V OUT =2mVp Gain=+2, V icm =.6V, RL=15Ω FPBW Full Power Bandwidth V icm=2v, V OUT = 2Vp-p, Gain=1, R L = 15Ω db db 3 15 MHz MHz Slew Rate V SR OUT =2Vp-p, R L =15Ω, 4 V/µs Gain=+2, V OH High Level Output Voltage R L = 15Ω V V OL Low Level Output Voltage R L = 15Ω 4 6 mv Output Short Circuit Current T amb 7 1 I OUT ma -4 C < T amb < +85 C 9 Noise and Distortion en Equivalent Input Noise Voltage F = 1kHz 7 nv/ Hz in Equivalent Input Noise Current (+) F = 1kHz 1.5 pa/ Hz HD2 HD3 2nd Harmonic Distortion 3rd Harmonic Distortion V OUT = 2Vp-p, R L = 15Ω Gain=+2, F= 1MHz, V OUT = 2Vp-p, R L = 15Ω Gain=+2, F= 1MHz, -57 dbc -63 dbc 3/13

4 Electrical Characteristics Figure 1. Frequency response Figure 4. Frequency response on capa-load Gain (db) Gain=+4 Gain=+2 Gain= Load=1Ω or 15Ω -14 SO8 and SOT M 1M 1M Frequency Response (db) 2 1 C=47pF Riso=1Ω C=22pF Riso=1Ω -1 C= or 1pF Gain=+2 Riso= Load=Riso + C//1kΩ (to ground) -2 1M 1M 1M C=1pF Riso= Figure 2. Gain flatness - SOT23-5L Figure 5. Gain flatness - SO8 6,4 6,4 6,2 Load=15Ω 6,2 Load=15Ω 6, 6, 5,8 5,8 Gain (db) 5,6 5,4 5,2 Load=1Ω Gain (db) 5,6 5,4 5,2 Load=1Ω 5, 5, 4,8 4,6 Gain=+2 4,8 4,6 1M 1M 1M 1M 1M 1M Figure 3. Total input noise vs. frequency Figure 6. Positive and negative slew rate 3, non-inverting input in short-circuit 2,5 G=+2 Load=1Ω or 15Ω SR+ Input Noise (nv/vhz) 1 Output Response (V) 2, 1,5 1,,5 SR k 1k 1k 1M 1M, -5ns -4ns -3ns -2ns -1ns s 1ns 2ns 3ns 4ns 5ns Time 4/13

5 Electrical Characteristics Figure 7. Distortion on 1Ω load Figure 1. Distortion on 15Ω load HD2 & HD3 (dbc) HD3 (3MHz) HD2 (3MHz) HD3 (1MHz) HD2 (1MHz) Load=1Ω Output Amplitude (Vp-p) HD2 & HD3 (dbc) HD3 (3MHz) HD3 (1MHz) HD2 (3MHz) -7 HD2-75 (1MHz) Load=15Ω Output Amplitude (Vp-p) Figure 8. Output lower rail vs. frequency Figure 11. Output voltage swing vs. Vcc 5 4 Load=1Ω or 15Ω 5 4 V OL (mv) 3 2 Vout max (Vp-p) k 1k 1M 1M 1M Figure 9. Output voltage swing vs. frequency 1 F=3MHz Load=1Ω or 15Ω 3, 3,25 3,5 3,75 4, 4,25 4,5 4,75 5, Vcc (V) Figure 12. Quiescent current vs. Vcc 5 2 no load 4 15 Vout max. (Vp-p) M Gain=+2 Load=1Ω or Load=15Ω 1M Icc (ma) 1 5 1,5 2, 2,5 3, 3,5 4, 4,5 5, Vcc (V) 5/13

6 Electrical Characteristics Figure 13. Isource Figure 16. Reverse isolation vs. frequency V VOH without load -2 Isource (ma) V V Isource V Gain (db) ,,5 1, 1,5 2, 2,5 3, 3,5 4, 4,5 5, V (V) -8 Small Signal Load=1Ω -1 1M 1M 1M 1G Figure 14. Bandwidth vs. temperature Figure 17. Ibias vs. temperature 3 11, 1,5 25 1, Bw (MHz) 2 I BIAS (µa) 9,5 9, 15 Gain=+1 Load=15Ω ,5 Load=15Ω 8, Figure 15. Input offset vs. temperature Figure 18. Supply current vs. temperature Vio (mv) -2-3 I CC (ma) Load=15Ω no Load /13

7 Electrical Characteristics Figure 19. Output lower rail vs. temperature Figure 21. Output higher rail vs. temperature,1 4,5,8 Gain=+2 Load=15Ω 4,25 V OL (V),6,4 V OH (V) 4,,2, ,75 Gain=+2 Load=15Ω 3, Figure 2. SVR vs. temperature Figure 22. CMR vs. temperature 86, 88 85,8 SVR (db) 85,6 85,4 85,2 85, 84,8 84,6 84,4 CMR (db) ,2 84, /13

8 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 (εr=4.6) epoxy 1.6mm copper thickness: 35µm Figure 23: Evaluation kit for high speed op-amps 8/13

9 Power Supply Considerations 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 1µF is necessary to minimize the distortion. For better quality bypassing, a capacitor of 1nF 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 24: Circuit for power supply bypassing +VCC + 1microF 1nF + _ +VCC GND 9/13

10 Using the to Drive Video Signals 5 Using the to Drive Video Signals Figure 25. Implementation of the video driver on output video DACs Video DAC 1Vpp Reconstruction Filtering LPF +5V + _ Volt Video Signal 2.25V 25mV time 75Ω Volt Video Signal 75Ω Cable 1.125V 125mV time 1Vpp 75Ω Rg Rfb 2Vpp V OL (5MHz) = 15mV (Figure 8) To drive the video signal properly, the output of the driver must be at least equal to 25mV (assuming V io and V OL variations). 1st solution: Set the video DAC -IRE output level to 125mV. White Level 1 IRE Black Level 3 IRE Image Content IRE 3mV 15mV 1Vp-p V Synchronization Tip 2nd solution: Implementation of a DC component in the input of the driver. Video DAC 33uF 1Vpp Reconstruction Filtering LPF 1k Volt +5V + _ Video Signal 2.25V Volt 25mV time Video Signal 75Ω 75Ω Cable 1.125V 125mV time 1Vpp 75Ω DC component =125mV Rg Rfb 2Vpp 1/13

11 Package Mechanical Data 6 Package Mechanical Data 6.1 SO-8 Package SO-8 MECHANICAL DATA DIM. mm. inch MIN. TYP MAX. MIN. TYP. MAX. A A A B C D E e H h L k 8 (max.) ddd /C 11/13

12 Package Mechanical Data 6.2 SOT23-5L (5-pin) package SOT23-5L MECHANICAL DATA DIM. mm. mils MIN. TYP MAX. MIN. TYP. MAX. A A A b C D E E e e L /13

13 7 Revision History Date Revision Description of Changes 1 Jan First release corresponding to Preliminary Data version of datasheet. 23 Mar 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. 13/13 The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners 25 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