TSH350_07 STMICROELECTRONICS [STMicroelectronics], TSH350_07 Datasheet

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TSH350_07

Manufacturer Part Number
TSH350_07
Description
550MHz low noise current feedback amplifier
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
Features
Applications
Description
The TSH350 is a current feedback operational
amplifier using a very high-speed complementary
technology to provide a bandwidth up to 410MHz
while drawing only 4.1mA of quiescent current.
With a slew rate of 940V/µs and an output stage
optimized for driving a standard 100 load, this
circuit is highly suitable for applications where
speed and power-saving are the main
requirements.
The TSH350 is a single operator available in the
tiny SOT23-5 and SO-8 plastic packages, saving
board space as well as providing excellent
thermal and dynamic performance.
June 2007
Bandwidth: 550MHz in unity gain
Quiescent current: 4.1mA
Slew rate: 940V/ s
Input noise: 1.5nV/ Hz
Distortion: SFDR=-66dBc (10MHz, 1V
2.8V
a 5V supply
Tested on 5V power supply
Communication & video test equipment
Medical instrumentation
ADC drivers
pp
minimum output swing on 100 load for
550MHz low noise current feedback amplifier
pp
)
Rev 4
Non-Inv. In.
Non-Inv. In.
Inv. In.
Inv. In.
Non-Inv. In.
Non-Inv. In.
VCC -
VCC -
NC
NC
Pin connections (top view)
Output 1
Output
VCC -
VCC -
1
1
2
2
3
3
4
4
1
2
2
3
3
SOT23-5
SO-8
SOT23-5
SOT23-5
_
_
+
+
SO-8
SO-8
+ -
+ -
5
5
4
4
TSH350
VCC +
VCC +
Inv. In.
Inv. In.
8
8
7
7
6
6
5
5
NC
NC
VCC +
VCC +
NC
NC
Output
Output
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TSH350_07 Summary of contents

Page 1

Features ■ Bandwidth: 550MHz in unity gain ■ Quiescent current: 4.1mA ■ Slew rate: 940V/ s ■ Input noise: 1.5nV/ Hz ■ Distortion: SFDR=-66dBc (10MHz, 1V ■ 2.8V minimum output swing on 100 load for supply ■ ...

Page 2

Absolute maximum ratings 1 Absolute maximum ratings Table 1. Absolute maximum ratings (AMR) Symbol V Supply voltage CC V Differential input voltage id V Input voltage range in T Storage temperature stg T Maximum junction temperature j Thermal resistance junction ...

Page 3

TSH350 Table 2. Operating conditions Symbol V Supply voltage CC V Common mode input voltage icm T Operating free air temperature range oper 1. Tested in full production at 5V (±2.5V) supply voltage. Parameter (1) Absolute maximum ratings Value Unit ...

Page 4

Electrical characteristics 2 Electrical characteristics Table 3. Electrical characteristics for V Symbol Parameter DC performance Input offset voltage V io Offset voltage between both inputs V V drift vs. temperature io io Non inverting input bias current I ib+ DC ...

Page 5

TSH350 Table 3. Electrical characteristics for V Symbol Parameter V Low level output voltage OL I sink Short-circuit output current coming in the op- amp (see Figure 9) I out I source Output current coming out from the op-amp (see ...

Page 6

Electrical characteristics Figure 1. Frequency response, positive gain Figure Gain=+ Gain=+ Gain=+ Gain=+ Small Signal -6 Vcc=5V -8 Load=100 -10 1M 10M Frequency (Hz) ...

Page 7

TSH350 Figure 7. Slew rate 2,0 1,5 1,0 0,5 0,0 -2ns -1ns 0s Time (ns) Figure 9. I sink 300 +2.5V +2. without load without load + + 250 -1V -1V Isink Isink ...

Page 8

Electrical characteristics Figure 13. Quiescent current vs Icc(+) Gain=+2 Vcc=5V 0 Input to ground, no load - Icc(-) -5 1,25 1,50 1,75 +/-Vcc (V) Figure 15. Distortion vs. output amplitude -20 ...

Page 9

TSH350 Figure 19. Reverse isolation vs. frequency 0 -20 -40 -60 -80 Small Signal Vcc=5V Load=100 -100 1M 10M Frequency (Hz) Figure 21. Bandwidth vs. temperature 550 500 450 400 350 300 Gain=+1 250 Vcc=5V Load=100 200 -40 -20 0 ...

Page 10

Electrical characteristics Figure 25. V vs. temperature io 1000 800 600 400 200 Open Loop Vcc=5V Load=100 0 -40 - Temperature (°C) Figure 27. V and V vs. temperature ...

Page 11

... TSH350 3 Evaluation boards An evaluation board kit optimized for high-speed operational amplifiers is available (order code: KITHSEVAL/STDL). As well as a CD-ROM containing datasheets, articles, application notes and a user manual, the kit includes the following evaluation boards: ● SOT23_SINGLE_HF BOARD Board for the evaluation of a single high-speed op-amp in SOT23-5 package. ...

Page 12

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 ...

Page 13

TSH350 A capacitor C is added in the gain network to ensure a unity gain in low frequency to keep G the right DC component at the output. C its value is calculated with a consideration of the cut off ...

Page 14

Noise measurements 5 Noise measurements The noise model is shown in ● the input voltage noise of the amplifier ● iNn is the negative input current noise of the amplifier ● iNp is the positive input current noise ...

Page 15

TSH350 Equation eNo The input noise of the instrumentation must be extracted from the measured noise value. The real output noise value of the driver is: Equation 3 eNo = The input noise is ...

Page 16

Intermodulation distortion product 6 Intermodulation distortion product The non-ideal output of the amplifier can be described by the following series: where the input is V the amplitude of the harmonics of the output signal V A one-frequency (one-tone) input signal ...

Page 17

TSH350 7 Inverting amplifier biasing A resistance is necessary to achieve good input biasing, such as resistance R shown in Figure 34. The magnitude of this resistance is calculated by assuming the negative and positive input bias current. The aim ...

Page 18

Active filtering 8 Active filtering Figure 35. Low-pass active filtering, Sallen-Key IN IN From the resistors R inverting amplification configuration: We assume the following expression as the response of the system: The cut-off frequency is not gain-dependent and so becomes: ...

Page 19

TSH350 9 Package information Figure 36. SOT23-5 package mechanical data Ref Dimensions Millimeters Min. Typ. Max. 0.90 1.45 0.00 0.15 0.90 1.30 0.35 0.50 0.09 0.20 2.80 3.00 2.60 ...

Page 20

Package information Figure 37. SO-8 package mechanical data Ref ccc 20/22 Dimensions Millimeters Min. Typ. Max. 1.75 0.10 0.25 1.25 0.28 0.48 0.17 0.23 4.80 4.90 5.00 5.80 ...

Page 21

TSH350 10 Ordering information Table 5. Order codes Part number TSH350ILT TSH350ID TSH350IDT 11 Revision history Date 1-Oct-2004 10-Dec-2004 21-Jun-2005 8-Jun-2007 Temperature Package range SOT23-5 -40°C to +85°C SO-8 SO-8 Revision 1 First release corresponding to Preliminary Data version of ...

Page 22

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 ...

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