Datasheet

LF155, LF156, LF355, LF356, LF357
www.ti.com SNOSBH0C –MAY 2000–REVISED MARCH 2013
Figure 57. High Q Band Pass Filter
• By adding positive feedback (R2)
• Q increases to 40
• f
BP
= 100 kHz
• Clean layout recommended
• Response to a 1Vp-p tone burst: 300μs
Figure 58. High Q Notch Filter
• 2R1 = R = 10MΩ
– 2C = C1 = 300pF
• Capacitors should be matched to obtain high Q
• f
NOTCH
= 120 Hz, notch = −55 dB, Q > 100
• Use LF155 for
– Low I
B
– Low supply current
Copyright © 2000–2013, Texas Instruments Incorporated Submit Documentation Feedback 23
Product Folder Links: LF155 LF156 LF355 LF356 LF357