LTC1563-2 Datasheet, PDF (4/20 Pages) Linear Technology – Active RC, 4th Order Lowpass Filter Family

LTC1563-2/LTC1563-3
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
V_S = Single 4.75V, EN pin to logic “low,” Gain = 1, R_FIL = R11 = R21 = R31 = R12 = R22 = R32, specifications apply to both the high
speed (HS) and low power (LP) modes unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Passband Gain, HS Mode, f_C = 25.6kHz
V_S = 4.75V, R_FIL = 100k
Stopband Gain, HS Mode, f_C = 25.6kHz
V_S = 4.75V, R_FIL = 100k
Passband Gain, HS Mode, f_C = 256kHz
V_S = 4.75V, R_FIL = 10k
Stopband Gain, HS Mode, f_C = 256kHz
V_S = 4.75V, R_FIL = 10k
Passband Gain, LP Mode, f_C = 25.6kHz
V_S = 4.75V, R_FIL = 100k
Stopband Gain, LP Mode, f_C = 25.6kHz
V_S = 4.75V, R_FIL = 100k
Test Frequency = 2.56kHz (0.1 • f_C)
Test Frequency = 12.8kHz (0.5 • f_C)
Test Frequency = 51.2kHz (2 • f_C)
Test Frequency = 102.4kHz (4 • f_C)
Test Frequency = 25.6kHz (0.1 • f_C)
Test Frequency = 128kHz (0.5 • f_C)
Test Frequency = 400kHz (1.56 • f_C)
Test Frequency = 500kHz (1.95 • f_C)
Test Frequency = 2.56kHz (0.1 • f_C)
Test Frequency = 12.8kHz (0.5 • f_C)
Test Frequency = 51.2kHz (2 • f_C)
Test Frequency = 102.4kHz (4 • f_C)
● – 0.2
0
0.2
dB
● – 0.3
0
0.3
dB
●
– 24 – 21.5
dB
●
– 48
– 46
dB
● – 0.2
0
0.2
dB
● – 0.5
0
0.5
dB
●
– 15.7 –13.5
dB
●
– 23.3 – 21.5
dB
● – 0.25
0
0.25
dB
● – 0.6 – 0.02
0.6
dB
●
– 24
– 22
dB
●
– 48 – 46.5
dB
LTC1563-3 Transfer Function Characteristics
Cutoff Frequency Range, f_C
HS Mode
(Note 2)
Cutoff Frequency Range, f_C
LP Mode
(Note 2)
Cutoff Frequency Accuracy, HS Mode
f_C = 25.6kHz
Cutoff Frequency Accuracy, HS Mode
f_C = 256kHz
Cutoff Frequency Accuracy, LP Mode
f_C = 25.6kHz
Cutoff Frequency Temperature Coefficient
V_S = 3V
V_S = 4.75V
V_S = ±5V
V_S = 2.7V
V_S = 4.75V
V_S = ±5V
V_S = 3V, R_FIL = 100k
V_S = 4.75V, R_FIL = 100k
V_S = ±5V, R_FIL = 100k
V_S = 3V, R_FIL = 10k
V_S = 4.75V, R_FIL = 10k
V_S = ±5V, R_FIL = 10k
V_S = 2.7V, R_FIL = 100k
V_S = 4.75V, R_FIL = 100k
V_S = ±5V, R_FIL = 100k
(Note 3)
● 0.256
● 0.256
● 0.256
● 0.256
● 0.256
● 0.256
● –3
±2
● –3
±2
● –3
±2
● –3
±2
● –3
±2
● –3
±2
● –4
±3
● –4
±3
● –4
±3
●
±1
256
kHz
256
kHz
256
kHz
25.6
kHz
25.6
kHz
25.6
kHz
5.5
%
5.5
%
5.5
%
6
%
6
%
6
%
7
%
7
%
7
%
ppm/°C
Passband Gain, HS Mode, f_C = 25.6kHz
V_S = 4.75V, R_FIL = 100k
Stopband Gain, HS Mode, f_C = 25.6kHz
V_S = 4.75V, R_FIL = 100k
Passband Gain, HS Mode, f_C = 256kHz
V_S = 4.75V, R_FIL = 10k
Stopband Gain, HS Mode, f_C = 256kHz
V_S = 4.75V, R_FIL = 10k
Passband Gain, LP Mode, f_C = 25.6kHz
V_S = 4.75V, R_FIL = 100k
Stopband Gain, LP Mode, f_C = 25.6kHz
V_S = 4.75V, R_FIL = 100k
Test Frequency = 2.56kHz (0.1 • f_C)
Test Frequency = 12.8kHz (0.5 • f_C)
Test Frequency = 51.2kHz (2 • f_C)
Test Frequency = 102.4kHz (4 • f_C)
Test Frequency = 25.6kHz (0.1 • f_C)
Test Frequency = 128kHz (0.5 • f_C)
Test Frequency = 400kHz (1.56 • f_C)
Test Frequency = 500kHz (1.95 • f_C)
Test Frequency = 2.56kHz (0.1 • f_C)
Test Frequency = 12.8kHz (0.5 • f_C)
Test Frequency = 51.2kHz (2 • f_C)
Test Frequency = 102.4kHz (4 • f_C)
● – 0.2 – 0.03
0.2
dB
● –1.0 – 0.72 – 0.25
dB
●
–13.6 –10
dB
●
– 34.7 – 31
dB
● – 0.2 – 0.03
0.2
dB
● –1.1 – 0.72 – 0.5
dB
●
– 8.3
–6
dB
●
– 13 –10.5
dB
● – 0.2 – 0.03
0.2
dB
● –1.0 – 0.72 – 0.25
dB
●
– 13.6 –11
dB
●
– 34.7 – 32
dB
Note 1: Absolute Maximum Ratings are those value beyond which the life
of a device may be impaired.
assembly practices are required. There may also be greater DC offset at
high temperatures when using such large valued resistors.
Note 2: The minimum cutoff frequency of the LTC1563 is arbitrarily listed
as 256Hz. The limit is arrived at by setting the maximum resistor value
limit at 10MΩ. The LTC1563 can be used with even larger valued resistors.
When using very large values of resistance careful layout and thorough
Note 3: The cutoff frequency temperature drift at low frequencies is as
listed. At higher cutoff frequencies (approaching 25.6kHz in low power
mode and approaching 256kHz in high speed mode) the internal
amplifier’s bandwidth can effect the cutoff frequency. At these limits the
cutoff frequency temperature drift is ±15ppm/°C.
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