Datasheet BUF802 (Texas Instruments) - 9

BUF802 www.ti.com
SBOS998C – JUNE 2021 – REVISED MARCH 2022
6.7 Typical Characteristics (continued)
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). 6 3 3 0 0 -3 n (dB) n (dB) Gai -3 Gai -6 -6 -9 CL = 400 fF C C L = 1 pF L = 3 pF, RISO = 22 C C L = 3 pF L = 1 pF, RISO = 39 -9 -12 100M 1G 10G 100M 1G 10G Frequency (Hz) Frequency (Hz) . .
Figure 6-7. Frequency Response vs Capacitive Load Figure 6-8. Frequency Response vs Cap Load with Recommended RISO
0.8 0.8 Input 0.6 0.6 Wide Bandwidth Mode Low IQ Mode 0.4 0.4 ) 0.2 0.2 age (V age (V olt 0 olt 0 put V -0.2 put V -0.2 Out Out -0.4 -0.4 Input -0.6 Wide Bandwidth Mode -0.6 Low IQ Mode -0.8 -0.8 Time (200 ps/div) Time (200 ps/div) Rising edge, VOUT = 1.2 VPP Falling edge, VOUT = 1.2 VPP
Figure 6-9. Large-Signal Transient Response Figure 6-10. Large-Signal Transient Response
0.2 0.2 Input 0.15 0.15 Wide Bandwidth Mode Low IQ Mode 0.1 0.1 ) 0.05 0.05 age (V age (V olt 0 olt 0 put V -0.05 put V -0.05 Out Out -0.1 -0.1 Input -0.15 Wide Bandwidth Mode -0.15 Low IQ Mode -0.2 -0.2 Time (200 ps/div) Time (200 ps/div) Rising edge, VOUT = 250 mVPP Falling edge, VOUT = 250 mVPP
Figure 6-11. Small-Signal Transient Response Figure 6-12. Small-Signal Transient Response
Copyright © 2022 Texas Instruments Incorporated Submit Document Feedback 9 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