Datasheet BUF802 (Texas Instruments) - 8
| 制造商 | Texas Instruments |
| 描述 | Wide-Bandwidth, 2.3-nv/√hz, High-input Impedance Jfet Buffer |
| 页数 / 页 | 38 / 8 — BUF802. www.ti.com. 6.7 Typical Characteristics. Figure 6-1. Frequency … |
| 文件格式/大小 | PDF / 2.1 Mb |
| 文件语言 | 英语 |
BUF802. www.ti.com. 6.7 Typical Characteristics. Figure 6-1. Frequency Response vs Output Voltage
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BUF802
SBOS998C – JUNE 2021 – REVISED MARCH 2022
www.ti.com 6.7 Typical Characteristics
At TA = 25°C, VS = ±6 V, RL = 100 Ω || 400 fF, RS = 25 Ω, VOCM = 0 V (mid-supply), VOUT = 1 VPP, CLH and CLL tied to VS+ and VS- respectively, Wide Bandwidth Mode unless otherwise specified (R_Bias = 17.8 kΩ). 3 3 0 0 -3 -3 n (dB) n (dB) Gai -6 Gai -6 V V -9 OUT = 20 mVPP OUT = 20 mVPP V -9 OUT = 100 mVPP VOUT = 100 mVPP VOUT = 1 VPP VOUT = 1 VPP VOUT = 2 VPP VOUT = 2 VPP -12 -12 100M 1G 10G 100M 1G 10G Frequency (Hz) Frequency (Hz) Wide Bandwidth Mode Low Quiescent Current Mode
Figure 6-1. Frequency Response vs Output Voltage Figure 6-2. Frequency Response vs Output Voltage
0 3 VOUT = 20 mVPP VOUT = 100 mVPP -0.1 VOUT = 1 VPP 0 -0.2 -3 n (dB) -0.3 n (dB) Gai Gai -6 -0.4 -0.5 -9 VS = 4.5 V VS = 5 V VS = 6 V -0.6 -12 1M 10M 100M 1G 10G 100M 1G 10G Frequency (Hz) Frequency (Hz) Wide Bandwidth Mode .
Figure 6-3. Frequency Response vs Output Voltage, Figure 6-4. Frequency Response vs Supply Voltage 0.1 dB Flatness
3 3 0 0 -3 -3 n (db) n (dB) Gai -6 Gai -6 R -9 L = 100 R -9 L = 200 R_Bias = 17.8 k RL = 1 k R_Bias = 35.7 k RL = 2 k R_Bias = 100 k -12 -12 100M 1G 10G 100M 1G 10G Frequency (Hz) Frequency (Hz) . .
Figure 6-5. Frequency Response vs Output Load Figure 6-6. Frequency Response vs R_Bias Resistance
8 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: BUF802 Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Revision History 5 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Recommended Operating Conditions 6.4 Thermal Information 6.5 Electrical Characteristics: Wide Bandwidth Mode 6.6 Electrical Characteristics: Low Quiescent Current Mode 6.7 Typical Characteristics 7 Parameter Measurement Information 8 Detailed Description 8.1 Overview 8.2 Functional Block Diagram 8.3 Feature Description 8.3.1 Input and Output Over-Voltage Clamp 8.3.2 Adjustable Quiescent Current 8.3.3 ESD Structure 8.4 Device Functional Modes 8.4.1 Buffer Mode (BF Mode) 8.4.2 Composite Loop Mode (CL Mode) 9 Application and Implementation 9.1 Application Information 9.2 Typical Application 9.2.1 Oscilloscope Front-End Amplifier Design 9.2.1.1 Design Requirements 9.2.1.2 Detailed Design Procedure 9.2.1.3 Application Curves 9.2.2 Transforming a Wide-Bandwidth, 50 Ω Input Signal Chain to High-Input Impedance 9.2.2.1 Detailed Design Results 9.2.2.2 Application Curves 10 Power Supply Recommendations 11 Layout 11.1 Layout Guidelines 11.2 Layout Example 12 Device and Documentation Support 12.1 Documentation Support 12.1.1 Related Documentation 12.2 Receiving Notification of Documentation Updates 12.3 Support Resources 12.4 Trademarks 12.5 Electrostatic Discharge Caution 12.6 Glossary 13 Mechanical, Packaging, and Orderable Information
SBOS998C – JUNE 2021 – REVISED MARCH 2022
www.ti.com 6.7 Typical Characteristics
At TA = 25°C, VS = ±6 V, RL = 100 Ω || 400 fF, RS = 25 Ω, VOCM = 0 V (mid-supply), VOUT = 1 VPP, CLH and CLL tied to VS+ and VS- respectively, Wide Bandwidth Mode unless otherwise specified (R_Bias = 17.8 kΩ). 3 3 0 0 -3 -3 n (dB) n (dB) Gai -6 Gai -6 V V -9 OUT = 20 mVPP OUT = 20 mVPP V -9 OUT = 100 mVPP VOUT = 100 mVPP VOUT = 1 VPP VOUT = 1 VPP VOUT = 2 VPP VOUT = 2 VPP -12 -12 100M 1G 10G 100M 1G 10G Frequency (Hz) Frequency (Hz) Wide Bandwidth Mode Low Quiescent Current Mode
Figure 6-1. Frequency Response vs Output Voltage Figure 6-2. Frequency Response vs Output Voltage
0 3 VOUT = 20 mVPP VOUT = 100 mVPP -0.1 VOUT = 1 VPP 0 -0.2 -3 n (dB) -0.3 n (dB) Gai Gai -6 -0.4 -0.5 -9 VS = 4.5 V VS = 5 V VS = 6 V -0.6 -12 1M 10M 100M 1G 10G 100M 1G 10G Frequency (Hz) Frequency (Hz) Wide Bandwidth Mode .
Figure 6-3. Frequency Response vs Output Voltage, Figure 6-4. Frequency Response vs Supply Voltage 0.1 dB Flatness
3 3 0 0 -3 -3 n (db) n (dB) Gai -6 Gai -6 R -9 L = 100 R -9 L = 200 R_Bias = 17.8 k RL = 1 k R_Bias = 35.7 k RL = 2 k R_Bias = 100 k -12 -12 100M 1G 10G 100M 1G 10G Frequency (Hz) Frequency (Hz) . .
Figure 6-5. Frequency Response vs Output Load Figure 6-6. Frequency Response vs R_Bias Resistance
8 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: BUF802 Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Revision History 5 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Recommended Operating Conditions 6.4 Thermal Information 6.5 Electrical Characteristics: Wide Bandwidth Mode 6.6 Electrical Characteristics: Low Quiescent Current Mode 6.7 Typical Characteristics 7 Parameter Measurement Information 8 Detailed Description 8.1 Overview 8.2 Functional Block Diagram 8.3 Feature Description 8.3.1 Input and Output Over-Voltage Clamp 8.3.2 Adjustable Quiescent Current 8.3.3 ESD Structure 8.4 Device Functional Modes 8.4.1 Buffer Mode (BF Mode) 8.4.2 Composite Loop Mode (CL Mode) 9 Application and Implementation 9.1 Application Information 9.2 Typical Application 9.2.1 Oscilloscope Front-End Amplifier Design 9.2.1.1 Design Requirements 9.2.1.2 Detailed Design Procedure 9.2.1.3 Application Curves 9.2.2 Transforming a Wide-Bandwidth, 50 Ω Input Signal Chain to High-Input Impedance 9.2.2.1 Detailed Design Results 9.2.2.2 Application Curves 10 Power Supply Recommendations 11 Layout 11.1 Layout Guidelines 11.2 Layout Example 12 Device and Documentation Support 12.1 Documentation Support 12.1.1 Related Documentation 12.2 Receiving Notification of Documentation Updates 12.3 Support Resources 12.4 Trademarks 12.5 Electrostatic Discharge Caution 12.6 Glossary 13 Mechanical, Packaging, and Orderable Information