TSH341 STMICROELECTRONICS | Alldatasheet
Document overview
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Technical content
March 2005 Revision 2 1/13 ■ Bandwidth: 300MHz ■ Single supply operation down to 3V ■ Low input & output rail ■ Very low harmonic distortion ■ Slew rate: 400V/µs ■ Voltage Input noise: 7nV/√Hz ■ Specified for 150Ω load and 100Ω load ■ Tested on 5V power supply ■ Data min. and max. are tested during production (Table 3)
Description
The TSH341 is a single supply operational amplifier featuring a large bandwidth of 300MHz 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 60mV (max.) from GND on a 150 Ω 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 TSH341 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 TSH341 is available in the tiny SOT23-5 and SO8 plastic packages. Pin Connections (top view)
Applications
■ High-end video systems ■ High Definition TV (HDTV) ■ Broadcast video ■ Multimedia products Order Codes -VCC +VCC + - OUT -IN+IN SOT23-5 +VCC NC OUT+ -VCC NC -IN +IN SO8 NC -VCC +VCC + - OUT -IN+IN SOT23-5 +VCC NC OUT+ -VCC NC -IN +IN SO8 NC Part Number Temperature Range Package Packaging Marking TSH341ILT -40°C to +85°C SOT23-5 Tape & Reel K307 TSH341ID SO-8 Tube H341I TSH341IDT Tape & Reel H341I TSH341 300MHz Single Supply Video Amplifier with Low In/Out Rail
1 Absolute Maximum Ratings
Table 1. Key parameters and their absolute maximum ratings 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 +0.3V. 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
2 Electrical Characteristics
Table 3. V CC = +5V, Tamb = 25°C (unless otherwise specified)
150 MHz
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: z SOT23_SINGLE_HF BOARD: Board for the evaluation of a single high-speed op-amp in SOT23-5 package. z SO8_SINGLE_HF: Board for the evaluation of a single high-speed op-amp in SO8 package. z SO8_DUAL_HF: Board for the evaluation of a dual high-speed op-amp in SO8 package. z 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. z SO14_TRIPLE: Board for the evaluation of a triple high-speed op-amp in SO14 package with video application considerations. Board material: z 2 layers z FR4 (εr=4.6) z epoxy 1.6mm z copper thickness: 35µm Figure 23: Evaluation kit for high speed op-amps
Power Supply Considerations TSH341
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 10 µF 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 24: Circuit for power supply bypassing +VCC 10microF 10nF TSH341 +VCC GND +VCC 10microF 10nF TSH341 +VCC GND
5 Using the TSH341 to Drive Video Signals
Figure 25. Implementation of the video driver on output video DACs
0 IRE
30 IRE
250mV (assuming Vio and VOL variations). Set the video DAC 0-IRE output level to 125mV. Implementation of a DC component in the input of the driver.
6 Package Mechanical Data
6.1 SO-8 Package
DIM. mm. inch A 1.35 1.75 0.053 0.069 A1 0.10 0.25 0.04 0.010 A2 1.10 1.65 0.043 0.065 B 0.33 0.51 0.013 0.020 C 0.19 0.25 0.007 0.010 D 4.80 5.00 0.189 0.197 E 3.80 4.00 0.150 0.157 e 1.27 0.050 H 5.80 6.20 0.228 0.244 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 k ˚ (max.) ddd 0.1 0.04 SO-8 MECHANICAL DATA 0016023/C
6.2 SOT23-5L (5-pin) package
DIM. mm. mils A 0.90 1.45 35.4 57.1 A1 0.00 0.15 0.0 5.9 A2 0.90 1.30 35.4 51.2 b 0.35 0.50 13.7 19.7 C 0.09 0.20 3.5 7.8 D 2.80 3.00 110.2 118.1 E 2.60 3.00 102.3 118.1 E1 1.50 1.75 59.0 68.8 e. 9 5 3 7 . 4 e1 1.9 74.8 L 0.35 0.55 13.7 21.6 SOT23-5L MECHANICAL DATA
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7 Revision History
Date Revision Description of Changes 01 Jan. 2005 1 First release corresponding to Preliminary Data version of datasheet. 23 Mar. 2005 2 Datasheet of mature, full-specification product