LT1809/LT1810
24
180910fa
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2000
LT 0709 REV A • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
Single 3V Supply, 4MHz, 4th Order Butterworth Filter
Benefi ting from a low voltage supply operation, low dis-
tortion and rail-to-rail output of LT1809, a low distortion
fi lter that is suitable for antialiasing can be built as shown
in Figure 10. On a 3V supply, the fi lter has a passband of
4MHz with 2.5V
P-P
signal and a stopband that is greater
than 70dB to frequency of 100MHz.
Figure 10. Single 3V Supply, 4MHz, 4th Order Butterworth Filter
Figure 11. Filter Frequency Response
+
–
V
S
2
47pF
1/2 LT1810
220pF
665Ω
V
IN
V
OUT
1809 F10
232Ω
232Ω
+
–
22pF
470pF
562Ω
274Ω
274Ω
1/2 LT1810
FREQUENCY (Hz)
10k 100k 1M 10M 100M
GAIN (dB)
1809 F11
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
V
S
= 3V, 0V
V
IN
= 2.5V
P-P
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 V
OS(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 V
OS(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 V
OS(MAX)
, Low Noise 3.5nV/√Hz,
Low Distortion –80dBc at 5MHz
