Datasheet LT1809, LT1810 (Analog Devices) - 24

LT1809/LT1810
TYPICAL APPLICATION Single 3V Supply, 4MHz, 4th Order Butterworth Filter
Benefi ting from a low voltage supply operation, low dis- in Figure 10. On a 3V supply, the fi lter has a passband of tortion and rail-to-rail output of LT1809, a low distortion 4MHz with 2.5VP-P signal and a stopband that is greater fi lter that is suitable for antialiasing can be built as shown than 70dB to frequency of 100MHz. 232Ω 274Ω 47pF 22pF 232Ω 665Ω VIN – 274Ω 562Ω 220pF 1/2 LT1810 – + 470pF 1/2 LT1810 VOUT + VS 2 1809 F10
Figure 10. Single 3V Supply, 4MHz, 4th Order Butterworth Filter
10 0 –10 –20 –30 –40 GAIN (dB) –50 –60 –70 –80 VS = 3V, 0V VIN = 2.5VP-P –90 10k 100k 1M 10M 100M FREQUENCY (Hz) 1809 F11
Figure 11. Filter Frequency Response RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LT1395 400MHz Current Feedback Amplifi er 800V/μs Slew Rate, Shutdown LT1632/LT1633 Dual/Quad 45MHz, 45V/μs Rail-to-Rail Input and Output Op Amps High DC Accuracy, 1.35mV VOS(MAX), 70mA Output Current, Max Supply Current 5.2mA per Amplifi er LT1630/LT1631 Dual/Quad 30MHz, 10V/μs Rail-to-Rail Input and Output Op Amps High DC Accuracy, 525μV VOS(MAX), 70mA Output Current, Max Supply Current 4.4mA per Amplifi er LT1806/LT1807 Single/Dual 325MHz, 140V/μs Rail-to-Rail Input and Output Op Amps High DC Accuracy, 550μV VOS(MAX), Low Noise 3.5nV/√Hz, Low Distortion –80dBc at 5MHz 180910fa 24 Linear Technology Corporation LT 0709 REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2000