LTC1164-6_15 Datasheet, PDF (5/12 Pages) Linear Technology – Low Power 8th Order Pin Selectable Elliptic or Linear Phase Lowpass Filter

TYPICAL PERFOR A CE CHARACTERISTICS
LTC1164-6
Passband vs Frequency and f_CLK
2.0
1.5
1.0
0.5
0
A. f_CLK = 250kHz
f_CUTOFF = 5kHz
B. f_CLK = 500kHz
f_CUTOFF = 10kHz
C. f_CLK = 1MHz
f_CUTOFF = 20kHz
– 0.5
A
BC
– 1.0
– 1.5
V_S = ±8V
– 2.0
– 2.5
(f_CLK/f_C) =
(PIN 10 AT
50:1
V⁺)
T_A = 25°C
– 3.0
1
10
30
FREQUENCY (kHz)
1164-6 G09
Maximum Passband over
Temperature
2.0
1.5
1.0
0.5
T_A = 70°C
0
T_A = –40°C
– 0.5
–1.0 _{VS = SINGLE 5V}
–1.5 ^{(fCLK/fC) = 50:1}
GND = 2V WITH
–2.0 EXTERNAL RC
LOWPASS FILTER
–2.5 _{(f– 3dB = 40kHz)}
– 3.0
2 4 6 8 10 12 14 16 18 20 22
FREQUENCY (kHz)
1164-6 G10
Group Delay vs Frequency
(Linear Phase Response)
250
f_CLK = 800kHz
(f_CLK/f_C) = 160:1
200 f_C = 5kHz
150
100
50
0
1 2 3 4 5 6 7 8 9 10 11
FREQUENCY (kHz)
1164-6 G22
Group Delay vs Frequency
(Elliptic Response)
700
A. f_CLK = 250kHz, (f_CLK/f_C) = 50:1
600
WITH EXTERNAL RC LOWPASS
FILTER (f_C = 10kHz)
500
B. f_CLK = 500kHz
(f_CLK/f_C) = 100:1
A
B
400
300
200
100
0
1
V_S = ±5V
f_C = 5kHz
T_A = 25°C
2
3
4
FREQUENCY (kHz)
5
1164-6 G12
THD + Noise vs Frequency
(Elliptic Response)
– 40
– 45
V_S =
(20k
±5V, V_IN =
RESISTOR
1V_RMS
PIN 14
TO
V^–
)
– 50 ^fCLK ^{= 500kHz, f}C ^{= 5kHz}
(f_CLK/f_C) = 100:1, T_A = 25°C
–55 _{(5 REPRESENTATIVE UNITS)}
– 60
– 65
– 70
– 75
– 80
– 85
– 90
1
2
3
FREQUENCY (kHz)
45
1164-6 G13
THD + Noise vs Frequency
(Elliptic Response)
– 40
–45 ^{VS = ±5V, VIN = 1VRMS,}
f_CLK = 500kHz, f_C = 10kHz,
– 50 (f_CLK/f_C) = 50:1, T_A = 25°C,
WITH EXTERNAL RC LOWPASS
–55 _{FILTER (f– 3dB = 20kHz)}
–60 ^{(5 REPRESENTATIVE UNITS)}
– 65
– 70
– 75
– 80
– 85
– 90
1
5
FREQUENCY (kHz)
10
1164-6 G14
THD + Noise vs Frequency
(Elliptic Response)
– 40
– 45
V_S = SINGLE 5V, V_IN = 0.7V_RMS
f_CLK = 500kHz, f_C = 5kHz,
– 50 (fCLK/fC) = 100:1, TA = 25°C
(5 REPRESENTATIVE UNITS)
– 55
– 60
– 65
– 70
– 75
– 80
– 85
– 90
0.5
1
FREQUENCY (kHz)
5
1164-6 G16
THD + Noise vs Frequency
(Linear Phase Response)
– 40
– 45
V_S = ±5V
V_IN = 1V_RMS
– 50 ^fCLK ^{= 800kHz}
f_C = 5kHz
–55 _{(fCLK/fC) = 160:1}
–60 ^{TA = 25°C}
– 65
– 70
– 75
– 80
– 85
– 90
1
2
3
FREQUENCY (kHz)
45
1164-6 G23
11646fa
5