LTC1569CS8-7#PBF Linear Technology, LTC1569CS8-7#PBF Datasheet - Page 10

• Manufacturer Part Number: LTC1569CS8-7#PBF
• Description: IC FILTER 10TH ORDR LOWPASS8SOIC
• Manufacturer: Linear Technology

Specifications of LTC1569CS8-7#PBF

• Filter Type: Linear Phase, Lowpass Switched Capacitor
• Frequency - Cutoff Or Center: 300kHz
• Number Of Filters: 1
• Max-order: 10th
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -

LTC1569-7
APPLICATIONS
10
every clock period. Therefore, the sampling frequency is
twice the clock frequency and 64 times the filter cutoff
frequency. Input signals with frequencies near 2 • f
appear at the output unattenuated.
Power Supply Current
The power supply current depends on the operating mode.
When the LTC1569-7 is in the divide-by-1 mode, or when
TYPICAL APPLICATIO S
f
CUTOFF
3V
3V
3.48k
2k
3.48k
2k
will be aliased to the passband of the filter and
Single 3V Supply Operation, DC Coupled,
Single 3V Operation, AC Coupled Input,
V
IN
f
CUTOFF
f
CUTOFF
0.1 F
V
1 F
IN
1 F
128kHz Cutoff Frequency
n = 1, 4, 16 FOR PIN 5 AT
32kHz Cutoff Frequency
=
n = 1, 4, 16 FOR PIN 5 AT
1
2
3
4
U
=
GROUND, OPEN, V
1
2
3
4
128kHz
GROUND, OPEN, V
IN
IN
GND
V
n = 4
128kHz
–
IN
IN
GND
V
n = 1
LTC1569-7
+
–
–
LTC1569-7
+
–
INFORMATION
DIV/CLK
U
DIV/CLK
R
OUT
10k
EXT
R
10k
V
R
OUT
EXT
X
+
R
V
X
+
+
8
7
6
5
+
8
7
6
5
U
V
OUT
W
R
V
OUT
EXT
R
100pF
EXT
= 10k
= 10k
1569-7 TA04
1569-7 TA02
U
1 F
1 F
3V
3V
CLK
–10
–20
–30
–40
–50
–60
–70
–80
–90
0
clocked externally, the supply current is reduced by 50%
for supply voltages below 4V. For the divide-by-4 and
divide-by-16 modes, the supply current is reduced by
60% relative to the current when clocked externally,
independent of the power supply voltage. Power supply
current versus cutoff frequency for various operating
modes is shown in the “Typical Performance Characteris-
tics” section.
LT
0
DC Coupled Differential Inputs with Balanced Input Impedance
(SOT-23)
®
1460-2.5
80k 100k
Single 5V Operation, 300kHz Cutoff Frequency,
GND
5V
IN
OUT
120k 140k
Single 3V, AC Coupled Input,
V
V
IN
IN
128kHz Cutoff Frequency
+
–
f
160k 180k
FREQUENCY (Hz)
CUTOFF
0
1 F
27k
n = 1, 4, 16 FOR PIN 5 AT
20k
~
1
2
3
4
GROUND, OPEN, V
128kHz
IN
IN
GND
V
n = 1
200k 220k
–
40k
LTC1569-7
+
–
DIV/CLK
60k
4.1k
10k
OUT
V
R
+
X
240k 260k
80k 100k
+
8
7
6
5
V
OUT
R
EXT
120k
280k
= 4.1k
1569-7 TA02a
140k
300k
1569-7 TA03
16 s
14 s
12 s
1 F
5V