TSH300 STMICROELECTRONICS | Alldatasheet
Document overview
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Technical content
Rev. 2 September 2005 1/18 TSH300 Ultra Low-Noise High-Speed Operational Amplifier ■ Structure: VFA ■ 200 MHz bandwidth ■ Input noise: 0.65 nV/ √Hz ■ Stable for gains > 5 ■ Slew rate: 230 V/µs ■ Specified on 100Ω load ■ Tested on 5 V power supply ■ Single or dual supply operation ■ Minimum and maximum limits are tested in full production
Description
The TSH300 is a voltage feedback amplifier featuring ultra-low input voltage and current noise. This feature, associated with a large bandwidth, large slew rate and a good linearity, makes the TSH300 a good choice for high-speed data acquisition systems where sensitivity and signal integrity are the main priorities. The TSH300 is a single operator available in SO8 and the tiny SOT23-5L plastic package, saving board space as well as providing excellent thermal performances.
Applications
■ High speed data ac quisition systems ■ Probe equipment ■ Communication & video test equipment ■ Medical instrumentation ■ ADC drivers Pin Connections (top view) Order Codes +VCC NC -VCC NC -IN +IN SO8 NC +VCC NC -VCC NC -IN +IN SO8 NC -VCC +VCC + - OUT -IN+IN SOT23-5 -VCC +VCC + - OUT -IN+IN SOT23-5 Part Number Temperature Range Package Packing Marking TSH300ILT -40°C to +85°C SOT23-5L Tape & Reel K308 TSH300ID SO-8 T ube TSH300I TSH300IDT SO-8 Tape & Reel TSH300I
1 Absolute Maximum Ratings
Table 1. Key parameters and their absolute maximum ratings
- All voltage values are measured with respect to the ground pin.
- Differential voltage is between the non-inverting input terminal and the inverting input terminal.
- The magnitude of input and output voltage must never exceed V CC +0.3V.
- Short-circuits can cause excessive heating. Destructive dissipation can result from short circuits on amplifiers.
- Human body model, 100pF discharged through a 1.5k Ω resistor into Pmin of device.
- This is a minimum value. Machine model ESD, a 200pF cap is charged to the specified voltage, then
discharged directly into the IC with no external series resistor (internal resistor < 5 Ω), into pin to pin of device. Table 2. Operating conditions
- Tested in full production at 5V (±2.5V) supply voltage.
2 Electrical Characteristics
Table 3. Electrical characteristics for V CC = ±2.5V, Tamb = 25°C (unless otherwise specified)
43 MHz
Short-circuit output current entering op-amp. Output current coming out of the op-amp.
- This parameter is guaranteed by design and evaluated using corner lots. This value is not tested in full production.
3 Power Supply Considerations
high-frequency bypassing. A capacitor greater than 1µF is necessary to minimize the distortion. Figure 43. Circuit for power supply bypassing
4 Evaluation Boards
- SOT23_SINGLE_HF BOARD: Board for the evaluation of a single high-speed op-amp in SOT23-5L 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 single supply.
- SO14_TRIPLE: Board for the evaluation of a triple high-speed op-amp in SO14 package with video application considerations. Board material description:
- 2 layers
- FR4 (εr=4.6)
- epoxy 1.6mm
- copper thickness: 35µm
Figure 44. Evaluation kit for high-speed op-amps
5 Noise Measurements
- eN: input voltage noise of the amplifier
- iNn: negative input current noise of the amplifier
- iNp: positive input current noise of the amplifier The thermal noise of a resistance R is: where ∆F is the specified bandwidth. On a 1Hz bandwidth the thermal noise is reduced to where k is the Boltzmann's constant, equal to 1,374.10-23J/°K. T is the temperature (°K). The output noise eNo is calculated using the Superposition Theorem. However eNo is not the simple sum of all noise sources, but rather the square root of the sum of the square of each noise source, as shown in Equation 1:
Figure 45. Noise model
The input noise of the instrumentation must be extracted from the measured noise value. The real output noise value of the driver is: The input noise is called the Equivalent Input Noise as it is not directly measured but is evaluated from the measurement of the output divided by the closed loop gain (eNo/g). After simplification of the fourth and the fifth term of Equation 2 we obtain: Measurement of the input voltage noise eN If we assume a short-circuit on the non-inverting input (R3=0), from Equation 4 we can derive: In order to easily extract the value of eN, the resistance R2 will be chosen to be as low as possible. In the other hand, the gain must be large enough: R3=0, gain: g=100 Measurement of the negative input current noise iNn To measure the negative input current noise iNn, we set R3=0 and use Equation 5. This time the gain must be lower in order to decrease the thermal noise contribution: R3=0, gain: g=10 Measurement of the positive input current noise iNp To extract iNp from Equation 3, a resistance R3 is connected to the non-inverting input. The value of R3 must be chosen in order to keep its thermal noise contribution as low as possible against the iNp contribution: R3=100Ω, gain: g=10 eNo Measured() 2 instrumentation() 2– (Equation 3)= eNo 2 eN2 g2 iNn 2 R22 iNp 2+×+× R32× g2× g4 k T R 2 g 2 4kTR3×+× (Equation 4)+= eNo eN 2 g2 iNn 2 R22 g4 k T R 2×+×+× (Equation 5)=
6 Package Mechanical Data
In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at:
6.1 SOT23-5L 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
6.2 SO8 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
7 Revision History
Date Revision Description of Changes Sept. 2005 1 Release of mature product datasheet Sept. 2005 2 Update to ESD information in Table 1 on page 2. 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 p ublication 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 STMicr oelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners © 2005 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Ital y - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America