Datasheet

10
LTC1569-6
Single 3V Operation, AC Coupled Input,
64kHz Cutoff Frequency
18
27
36
45
V
OUT
V
IN
1µF
3V
R
EXT
= 10k
1µF
0.1µF
2k
3.48k
3V
1569-6 TA02
LTC1569-6
IN
+
IN
–
GND
V
–
OUT
V
+
R
X
DIV/CLK
f
CUTOFF
=
n = 1, 4, 16 FOR PIN 5 AT
GROUND, OPEN, V
+
64kHz
n = 1
()
10k
R
EXT
()
FREQUENCY (Hz)
0 150k
40k 50k 80k 90k 120k 130k60k 70k 100k 110k 140k
GAIN (dB)
GROUP DELAY
1569-6 TA02a
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
32µs
28µs
24µs
70k0 10k 40k 50k20k 30k 60k
Single 3V, AC Coupled Input,
64kHz Cutoff Frequency
APPLICATIONS INFORMATION
WUU
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quency. The LTC1569-6 samples the input signal twice
every clock period. Therefore, the sampling frequency is
twice the clock frequency and 128 times the filter cutoff
V
IN
DC (V)
–1.5 –1.0 –0.5 0 0.5 1.0 1.5
1569-6 F09
488
244
0
–244
–488
V
S
= 5V
R
EXT
= 10k
T
A
= 25°C
DC ERROR (µV)
Figure 9
8
3
1
2
OUT
IN
–
IN
+
GND
1569-6 F06
–
+
125k
+
–
–
+
125k
i =
IN
+
– GND
125k
Figure 8
frequency. Input signals with frequencies near 2 • f
CLK
± f
CUTOFF
will be aliased to the passband of the filter and
appear at the output unattenuated.
TYPICAL APPLICATIO S
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