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, VCC+ = 2.5 V,

VCC– = –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, fmax

See Note 2

1.5

3

1.5

3

MHz

Clock-to-cutoff-frequency ratio (fclock/fco)

fclock ≤ 250 kHz, TA = 25°C

49.27

50.07

50.87

99

100

101

Hz/Hz

Temperature coefficient of clock-to-cutoff

frequency ratio

fclock ≤ 250 kHz

±25

±25

ppm/

°C

fco = 5 kHz,

f lk 250 kHz

f = 6 kHz

– 7.9

– 7.57

– 7.1

dB

Frequency response above and below

fclock = 250 kHz,

TA = 25°C

f = 4.5 kHz

– 1.7

– 1.46

– 1.3

dB

qy

cutoff frequency (see Note 5)

fco = 5 kHz,

f lk 250 kHz

f = 3 kHz

– 7.9

– 7.42

– 7.1

dB

fclock = 250 kHz,

TA = 25°C

f = 2.25 kHz

– 1.7

–1.51

– 1.3

dB

Dynamic range (see Note 6)

TA = 25°C

80

78

dB

Stop-band frequency attentuation at 2 fco

fclock ≤ 250 kHz

24

25

24

25

dB

Voltage amplification, dc

fclock ≤ 250 kHz, RS ≤ 2 kΩ

– 0.15

0

0.15

– 0.15

0

0.15

dB

Peak-to-peak clock feedthrough voltage

TA = 25°C

5

5

mV

† All typical values are at TA = 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, VCC+ = 5 V,

VCC– = –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, fmax

See Note 2

2

4

2

4

MHz

Clock-to-cutoff-frequency ratio (fclock/fco)

fclock ≤ 250 kHz,

TA = 25°C

49.58

49.98

50.38

99

100

101

Hz/Hz

Temperature coefficient of clock-to-cutoff

frequency ratio

fclock ≤ 250 kHz

±15

±15

ppm/

°C

fco = 5 kHz,

f lk 250 kHz

f = 6 kHz

– 7.9

– 7.57

– 7.1

dB

Frequency response above and below

fclock = 250 kHz,

TA = 25°C

f = 4.5 kHz

– 1.7

– 1.44

– 1.3

dB

qy

cutoff frequency (see Note 5)

fco = 5 kHz,

f lk 250 kHz

f = 3 kHz

– 7.9

– 7.42

– 7.1

dB

fclock = 250 kHz,

TA = 25°C

f = 2.25 kHz

– 1.7

–1.51

– 1.3

dB

Dynamic range (see Note 6)

TA = 25°C

86

84

dB

Stop-band frequency attentuation at 2 fco

fclock ≤ 250 kHz

24

25

24

25

dB

Voltage amplification, dc

fclock ≤ 250 kHz,

RS

≤ 2 kΩ

– 0.15

0

0.15

– 0.15

0

0.15

dB

Peak-to-peak clock feedthrough voltage

TA = 25°C

7

7

mV

† All typical values are at TA = 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.