Datasheet
TLC04/MF4A-50, TLC14/MF4A-100
BUTTERWORTH FOURTH-ORDER LOW-PASS
SWITCHED-CAPACITOR FILTERS
SLAS021A – NOVEMBER 1986 – REVISED MARCH 1995
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
operating characteristics over recommended operating free-air temperature range, V
CC+
= 2.5 V,
V
CC–
= –2.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TLC04/MF4A-50 TLC14/MF4A-100
UNIT
PARAMETER
TEST
CONDITIONS
MIN
TYP
†
MAX MIN
TYP
†
MAX
UNIT
Maximum clock frequency, f
max
See Note 2 1.5 3 1.5 3 MHz
Clock-to-cutoff-frequency ratio (f
clock
/f
co
) f
clock
≤ 250 kHz, T
A
= 25°C 49.27 50.07 50.87 99 100 101 Hz/Hz
Temperature coefficient of clock-to-cutoff
frequency ratio
f
clock
≤ 250 kHz ±25 ±25 ppm/°C
f
co
= 5 kHz,
f
lk
250 kHz
f = 6 kHz –7.9 –7.57 –7.1
dB
Frequency response above and below
f
clock
=
250
kH
z,
T
A
= 25°C
f = 4.5 kHz –1.7 –1.46 –1.3
dB
qy
cutoff frequency (see Note 5)
f
co
= 5 kHz,
f
lk
250 kHz
f = 3 kHz –7.9 –7.42 –7.1
dB
f
clock
=
250
kH
z,
T
A
= 25°C
f = 2.25 kHz –1.7 –1.51 –1.3
dB
Dynamic range (see Note 6) T
A
= 25°C 80 78 dB
Stop-band frequency attentuation at 2 f
co
f
clock
≤ 250 kHz 24 25 24 25 dB
Voltage amplification, dc f
clock
≤ 250 kHz, RS ≤ 2 kΩ –0.15 0 0.15 –0.15 0 0.15 dB
Peak-to-peak clock feedthrough voltage T
A
= 25°C 5 5 mV
†
All typical values are at T
A
= 25°C.
NOTES: 2. Above 250 kHz, the input clock duty cycle should be 50% to allow the operational amplifiers the maximum time to settle while
processing analog samples.
5. The frequency responses at f are referenced to a dc gain of 0 dB.
6. The dynamic range is referenced to 1.06 V rms (1.5 V peak) where the wideband noise over a 30-kHz bandwidth is typically
106 µV rms for the TLC04/MF4A-50 and 135 µV rms for the TLC14/MF4A-100.
operating characteristics over recommended operating free-air temperature range, V
CC+
= 5 V,
V
CC–
= –5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TLC04/MF4A-50 TLC14/MF4A-100
UNIT
PARAMETER
TEST
CONDITIONS
MIN
TYP
†
MAX MIN TYP
†
MAX
UNIT
Maximum clock frequency, f
max
See Note 2 2 4 2 4 MHz
Clock-to-cutoff-frequency ratio (f
clock
/f
co
) f
clock
≤ 250 kHz, T
A
= 25°C 49.58 49.98 50.38 99 100 101 Hz/Hz
Temperature coefficient of clock-to-cutoff
frequency ratio
f
clock
≤ 250 kHz ±15 ±15 ppm/°C
f
co
= 5 kHz,
f
lk
250 kHz
f = 6 kHz –7.9 –7.57 –7.1
dB
Frequency response above and below
f
clock
=
250
kH
z,
T
A
= 25°C
f = 4.5 kHz –1.7 –1.44 –1.3
dB
qy
cutoff frequency (see Note 5)
f
co
= 5 kHz,
f
lk
250 kHz
f = 3 kHz –7.9 –7.42 –7.1
dB
f
clock
=
250
kH
z,
T
A
= 25°C
f = 2.25 kHz –1.7 –1.51 –1.3
dB
Dynamic range (see Note 6) T
A
= 25°C 86 84 dB
Stop-band frequency attentuation at 2 f
co
f
clock
≤ 250 kHz 24 25 24 25 dB
Voltage amplification, dc f
clock
≤ 250 kHz, RS ≤ 2 kΩ –0.15 0 0.15 –0.15 0 0.15 dB
Peak-to-peak clock feedthrough voltage T
A
= 25°C 7 7 mV
†
All typical values are at T
A
= 25°C.
NOTES: 2. Above 250 kHz, the input clock duty cycle should be 50% to allow the operational amplifiers the maximum time to settle while
processing analog samples.
5. The frequency responses at f are referenced to a dc gain of 0 dB.
6. The dynamic range is referenced to 2.82 V rms (4 V peak) where the wideband noise over a 30-kHz bandwidth is typically 142 µV rms
for the TLC04/MF4A-50 and 178 µV rms for the TLC14/MF4A-100.