TEXAS INSTRUMENTS TLC04, MF4A-50, TLC14, MF4A-100 Technical data

CLOCK-TO-CUTOFF

FREQUENCY RATIO

查询TLC04/MF4A-50供应商

TLC04/MF4A-50, TLC14/MF4A-100

BUTTERWORTH FOURTH-ORDER LOW-PASS

SWITCHED-CAPACITOR FILTERS

SLAS021A – NOVEMBER 1986 – REVISED MARCH 1995

D

Low Clock-to-Cutoff-Frequency Ratio Error

TLC04/MF4A-50...±0.8%
TLC14/MF4A-100 . . . ±1%

D

Filter Cutoff Frequency Dependent Only on
External-Clock Frequency Stability

D

Minimum Filter Response Deviation Due to
External Component Variations Over Time

D OR P PACKAGE

(TOP VIEW)

CLKIN

CLKR

LS

V

CC–

1
2
3
4

FILTER IN

8

V

7

CC+

AGND

6

FILTER OUT

5

and Temperature

D

Cutoff Frequency Range From 0.1 Hz
to 30 kHz, V

D

5-V to 12-V Operation

D

Self Clocking or TTL-Compatible and

CC±

= ±2.5 V

CMOS-Compatible Clock Inputs

D

Low Supply-Voltage Sensitivity

D

Designed to be Interchangeable With
National MF4-50 and MF4-100

description

The TLC04/MF4A-50 and TLC14/MF4A-100 are monolithic Butterworth low-pass switched-capacitor filters.
Each is designed as a low-cost, easy-to-use device providing accurate fourth-order low-pass filter functions in
circuit design configurations.

Each filter features cutoff frequency stability that is dependent only on the external-clock frequency stability . The
cutoff frequency is clock tunable and has a clock-to-cutoff frequency ratio of 50:1 with less than ±0. 8% error
for the TLC04/MF4A-50 and a clock-to-cutoff frequency ratio of 100:1 with less than ±1% error for the
TLC14/MF4A-100. The input clock features self-clocking or TTL- or CMOS-compatible options in conjunction
with the level shift (LS) terminal.

The TLC04C/MF4A-50C and TLC14C/MF4A-100C are characterized for operation from 0°C to 70°C. The
TLC04I/MF4A-50I and TLC14I/MF4A-100I are characterized for operation from –40°C to 85°C. The
TLC04M/MF4A-50M and TLC14M/MF4A-100M are characterized over the full military temperature range of
–55°C to 125°C.

PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.

AVAILABLE OPTIONS

PACKAGE

T

A

0°C to 70°C

–40°C to 85°C

–55°C to 125°C

The D package is available taped and reeled. Add the suffix R to the device type (e.g., TLC04CDR/MF4A-50CDR).

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

50:1

100:1

50:1

100:1

50:1

100:1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

SMALL OUTLINE PLASTIC DIP

(D) (P)

TLC04CD/MF4A-50CD
TLC14CD/MF4A-100CD

TLC04ID/MF4A-50ID
TLC14ID/MF4A-100ID

TLC04CP/MF4A-50CP
TLC14CP/MF4A-100CP

TLC04IP/MF4A-50IP
TLC14IP/MF4A-100IP

TLC04MP/MF4A-50MP
TLC14MP/MF4A-100MP

Copyright  1995, Texas Instruments Incorporated

1

TLC04/MF4A-50, TLC14/MF4A-100

I/O

DESCRIPTION

BUTTERWORTH FOURTH-ORDER LOW-PASS
SWITCHED-CAPACITOR FILTERS

SLAS021A – NOVEMBER 1986 – REVISED MARCH 1995

functional block diagram

3

LS

Level Shift

CLKIN

CLKR

1

2

Nonoverlapping
Clock Generator

φ2φ1

FILTER IN

AGND

8
6

Butterworth

Fourth-Order

Low-Pass Filter

5

FILTER OUT

Terminal Functions

TERMINAL

NAME NO.

AGND 6 I Analog ground. The noninverting input to the operational amplifiers of the Butterworth fourth-order low-pass filter.
CLKIN 1 I Clock in. CLKIN is the clock input terminal for CMOS-compatible clock or self-clocking options. For either option,

CLKR 2 I Clock R. CLKR is the clock input for a TTL-compatible clock. For a TTL clock, LS is connected to midsupply and

FILTER IN 8 I Filter input
FILTER OUT 5 O Butterworth fourth-order low-pass filter output
LS 3 I Level shift. LS accommodates the various input clocking options. For CMOS-compatible clocks or self-clocking,

V
V

CC+
CC–

7 I Positive supply voltage terminal
4 I Negative supply voltage terminal

LS is at V
from CLKIN to ground.

CLKIN can be left open, but it is recommended that it be connected to either V

LS is at V

. For self-clocking, a resistor is connected between CLKIN and CLKR and a capacitor is connected

CC–

and for TTL-compatible clocks, LS is at midsupply.

CC–

CC+

or V

CC–

.

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

UNIT

Clock frequenc

f

(see Note 2)

H

PARAMETER

TEST CONDITIONS

UNIT

VOMPeak output voltage

R

kΩ

V

IOSShort-circuit output current

T

25°C

See Note 4

mA

TLC04/MF4A-50, TLC14/MF4A-100

BUTTERWORTH FOURTH-ORDER LOW-PASS

SWITCHED-CAPACITOR FILTERS

SLAS021A – NOVEMBER 1986 – REVISED MARCH 1995

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage range, V
Operating free-air temperature range, T

(see Note 1) ±7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CC±

: TLC04C/MF4A-50C, TLC14C/MF4A-100C 0°C to 70°C. . . . . .

A

†

TLC04I/MF4A-50I, TLC14I/MF4A-100I –40°C to 85°C. . . . . . . .

TLC04M/MF4A-50M, TLC14M/MF4A-100M –55°C to 125°C. . .

Storage temperature range, T

–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

stg

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: All voltage values are with respect to the AGND terminal.

recommended operating conditions

TLC04/MF4A-50 TLC14/MF4A-100

MIN MAX MIN MAX

Positive supply voltage, V
Negative supply voltage, V
High-level input voltage, V
Low-level input voltage, V

y,

Cutoff frequency, fco (see Note 3) 0.1 40x10

Operating free-air temperature, T

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.

3. The cutoff frequency is defined as the frequency where the response is 3.01 dB less than the dc gain of the filter.

clock

CC+

CC–

IH

IL

V

= ±2.5 V 5 1.5x10

A

CC±

V

= ±5 V 5 2x10

CC±

TLC04C/MF4A-50C, TLC14C/MF4A-100C 0 70 0 70
TLC04I/MF4A-50I, TLC14I/MF4A-100I –40 85 –40 85
TLC04M/MF4A-50M, TLC14M/MF4A-100M –55 125 –55 125

2.25 6 2.25 6 V

–2.25 –6 –2.25 –6 V

2 2 V

0.8 0.8 V
6

6
3

5 1.5x10
5 2x10

0.05 20x10

6
6
3

Hz

°C

z

electrical characteristics over recommended operating free-air temperature range, V
V

= –2.5 V, f

CC–

filter section

V

Output offset voltage 25 50 mV

OO

p

I

Supply current f

CC

‡

All typical values are at TA = 25°C.

NOTE 4: I

OS(source)

I

OS(sink)

is measured by forcing the output to its maximum negative voltage and then shorting the output to the V

≤ 250 kHz (unless otherwise noted)

clock

TLC04/MF4A-50 TLC14/MF4A-100

MIN

V

OM+

V

OM–

p

is measured by forcing the output to its maximum positive voltage and then shorting the output to the V

Source
Sink

= 10

L

°

,

=

A

= 250 kHz 1.2 2.25 1.2 2.25 mA

clock

1.8 2 1.8 2

–1.25 –1.7 –1.25 –1.7

‡

TYP

MAX MIN

–0.5 –0.5

4 4

TYP

‡

CC+

MAX

CC+

= 2.5 V,

terminal

CC –

terminal.

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3

TLC04/MF4A-50, TLC14/MF4A-100

PARAMETER

UNIT

VOMPeak output voltage

R

kΩ

V

IOSShort-circuit output current

A

,

mA

V

Positive-going input threshold voltage

V

V

Negative-going input threshold voltage

CLKIN

V

V

Hysteresis voltage (V

V

)

V

VOHHigh-level output voltage

I

10 µA

V

VOLLow-level output voltage

I

A

V

Input leakage current

CLKR

y,

A

mA

IOOutput current

mA

BUTTERWORTH FOURTH-ORDER LOW-PASS
SWITCHED-CAPACITOR FILTERS

SLAS021A – NOVEMBER 1986 – REVISED MARCH 1995

electrical characteristics over recommended operating free-air temperature range, V
V

= –5 V, f

CC –

filter section

V

Output offset voltage 150 200 mV

OO

p

I

Supply current f

CC

k

Supply voltage sensitivity (see Figures 1 and 2) –30 –30 dB

SVS

†

All typical values are at TA = 25°C.

NOTE 4: I

OS(source)

is measured by forcing the output to its maximum negative voltage and then shorting the output to the V

clocking section

IT+

IT–

hys

p

p

†

All typical values are at TA = 25°C.

≤ 250 kHz (unless otherwise noted)

clock

TEST

CONDITIONS

V

OM+

V

OM–

p

is measured by forcing the output to its maximum positive voltage and then shorting the output to the V

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

p

p

–

IT+

p

p

Source
Sink

IT–

= 10

L

T

= 25°C,

See Note 4

= 250 kHz 1.8 3 1.8 3 mA

clock

V

= 10 V , V

CC+

V

= 5 V, V

CC+

V

= 10 V , V

CC+

V

= 5 V, V

CC+

V

= 10 V , V

CC+

V

= 5 V, V

CC+

VCC = 10 V
VCC = 5 V
VCC = 10 V
VCC = 5 V
VCC = 10 V
VCC = 5 V
VCC = 10 V
VCC = 5 V
VCC = 10 V
VCC = 5 V

TLC04/MF4A-50 TLC14/MF4A-100

MIN TYP†MAX MIN TYP†MAX

3.75 4.3 3.75 4.5

–3.75 –4.1 –3.75 –4.1

–2 –2

5 5

CC–
terminal.

CC+

= 0 6.1 7 8.9

CC–

= 0 3.1 3.5 4.4

CC–

= 0 1.3 3 3.8

CC–

= 0 0.6 1.5 1.9

CC–

= 0 2.3 4 7.6

CC–

= 0 1.2 2 3.8

CC–

= –

O

= 10 µ

O

LS at midsupply,
TA = 25°C

CLKR and CLKIN
shortened to V

CLKR and CLKIN
shortened to V

CC–

CC+

9

4.5

–3 –7

–0.75 –2

3 7

0.75 2

terminal. I

CC +

1

0.5
2
2

= 5 V,

OS(sink)

µ

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PARAMETER

TEST CONDITIONS

UNIT

f

250 kH

dB

qy

f

250 kH

dB

PARAMETER

TEST CONDITIONS

UNIT

f

250 kH

dB

qy

f

250 kH

dB

TLC04/MF4A-50, TLC14/MF4A-100

BUTTERWORTH FOURTH-ORDER LOW-PASS

SWITCHED-CAPACITOR FILTERS

SLAS021A – NOVEMBER 1986 – REVISED MARCH 1995

operating characteristics over recommended operating free-air temperature range, V
V

= –2.5 V (unless otherwise noted)

CC–

TLC04/MF4A-50 TLC14/MF4A-100

TYP

†

MAX MIN

MIN

Maximum clock frequency, f
Clock-to-cutoff-frequency ratio (f
Temperature coefficient of clock-to-cutoff

frequency ratio

Frequency response above and below
cutoff frequency (see Note 5)

Dynamic range (see Note 6) TA = 25°C 80 78 dB
Stop-band frequency attentuation at 2 f
Voltage amplification, dc f
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.

max

clock/fco

See Note 2 1.5 3 1.5 3 MHz

) f

cofclock

≤ 250 kHz, TA = 25°C 49.27 50.07 50.87 99 100 101 Hz/Hz

clock

f

≤ 250 kHz ±25 ±25 ppm/°C

clock

fco = 5 kHz,

=

clock

TA = 25°C
fco = 5 kHz,

=

clock

TA = 25°C

≤ 250 kHz 24 25 24 25 dB
≤ 250 kHz, RS ≤ 2 kΩ –0.15 0 0.15 –0.15 0 0.15 dB

clock

f = 6 kHz –7.9 –7.57 –7.1

z,

f = 4.5 kHz –1.7 –1.46 –1.3
f = 3 kHz –7.9 –7.42 –7.1

z,

f = 2.25 kHz –1.7 –1.51 –1.3

TYP

†

CC+

MAX

= 2.5 V,

operating characteristics over recommended operating free-air temperature range, V
V

= –5 V (unless otherwise noted)

CC–

TLC04/MF4A-50 TLC14/MF4A-100

TYP

†

MAX MIN TYP†MAX

MIN

Maximum clock frequency, f
Clock-to-cutoff-frequency ratio (f
Temperature coefficient of clock-to-cutoff

frequency ratio

Frequency response above and below
cutoff frequency (see Note 5)

Dynamic range (see Note 6) TA = 25°C 86 84 dB
Stop-band frequency attentuation at 2 f
Voltage amplification, dc f
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.

max

clock/fco

See Note 2 2 4 2 4 MHz

) f

cofclock

≤ 250 kHz, TA = 25°C 49.58 49.98 50.38 99 100 101 Hz/Hz

clock

f

≤ 250 kHz ±15 ±15 ppm/°C

clock

fco = 5 kHz,

=

clock

TA = 25°C
fco = 5 kHz,

=

clock

TA = 25°C

≤ 250 kHz 24 25 24 25 dB
≤ 250 kHz, RS ≤ 2 kΩ –0.15 0 0.15 –0.15 0 0.15 dB

clock

f = 6 kHz –7.9 –7.57 –7.1

z,

f = 4.5 kHz –1.7 –1.44 –1.3
f = 3 kHz –7.9 –7.42 –7.1

z,

f = 2.25 kHz –1.7 –1.51 –1.3

CC+

= 5 V,

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5

TLC04/MF4A-50, TLC14/MF4A-100
BUTTERWORTH FOURTH-ORDER LOW-PASS
SWITCHED-CAPACITOR FILTERS

SLAS021A – NOVEMBER 1986 – REVISED MARCH 1995

TYPICAL CHARACTERISTICS

FILTER OUTPUT

SUPPLY VOLTAGE V

0

V

= 5 V + 50-mV Sine Wave

CC+

V

= –5 V

– 10

– 20

– 30

Filter Output – dB

– 40

– 50

CC–

Filter in at 0 V
f

= 250 kHz

clock

CC+

(0 to 40 kHz)

vs

RIPPLE FREQUENCY

– 60

Supply Voltage V

SUPPLY VOLTAGE V

0

V

CC+

V

CC–

– 10

– 20

– 30

Filter Output – dB

– 40

– 50

Filter in at 0 V
f

clock

Ripple Frequency – kHz

CC+

Figure 1

FILTER OUTPUT

vs

RIPPLE FREQUENCY

CC–

= 5 V

= –5 V + 50-mV Sine Wave

= 250 kHz

(0 to 40 kHz)

4035302520151050

– 60

0 5 10 15 20 25 30 35 40

Supply Voltage V

Ripple Frequency – kHz

CC–

Figure 2

6

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TLC04/MF4A-50, TLC14/MF4A-100

BUTTERWORTH FOURTH-ORDER LOW-PASS

SWITCHED-CAPACITOR FILTERS

SLAS021A – NOVEMBER 1986 – REVISED MARCH 1995

APPLICATION INFORMATION

5 V

7

V

3LS

CC+

Level Shift

CMOS
CLKIN

5 V

–5 V

–5 V

1 CLKIN

2 CLKR

8 FILTER IN
6 AGND

V

CC–

4

Figure 3. CMOS-Clock-Driven Dual-Supply Operation

5 V

7

V

3LS

CC+

Nonoverlapping

Clock Generator

φ1 φ2

Butterworth

Fourth-Order

Low-Pass Filter

Level Shift

5

FILTER
OUT

TTL
CLKR

–5 V

0 V

–5 V

1 CLKIN

2 CLKR

Nonoverlapping

Clock Generator

φ1 φ2

8 FILTER IN
6 AGND

V

CC–

4

Butterworth

Fourth-Order

Low-Pass Filter

Figure 4. TTL-Clock-Driven Dual-Supply Operation

5

FILTER
OUT

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7

TLC04/MF4A-50, TLC14/MF4A-100
BUTTERWORTH FOURTH-ORDER LOW-PASS
SWITCHED-CAPACITOR FILTERS

SLAS021A – NOVEMBER 1986 – REVISED MARCH 1995

APPLICATION INFORMATION

5 V

3

LS

1

CLKIN

R

2

CLKR

V

CC+

7

Level Shift

C

Nonoverlapping

Clock Generator

φ1 φ2

Filter
Input

–5 V

8

FILTER IN

6

AGND

f

clock

For VCC = 10 V

f

clock

+

RC In

=

1.69 RC

Butterworth

Fourth-Order

Low-Pass Filter

V

CC–

4

1

VCC–V

ǒ

ƪ

VCC–V

IT

1

IT–

)

Ǔǒ

V

IT

)

Ǔ

ƫ

V

IT–

FILTER
OUT

Figure 5. Self-Clocking Through Schmitt-Trigger Oscillator Dual-Supply Operation

5

Filter
Output

8

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TLC04/MF4A-50, TLC14/MF4A-100

BUTTERWORTH FOURTH-ORDER LOW-PASS

SWITCHED-CAPACITOR FILTERS

SLAS021A – NOVEMBER 1986 – REVISED MARCH 1995

APPLICATION INFORMATION

10 V

7

V

CC+

3LS

Level Shift

10 V

CMOS
CLKIN

See Note A

TTL
CLKR

FILTER IN
(see Note B)

NOTES: A. The external clock used must be of CMOS level because the clock is input to a CMOS Schmitt trigger.

B. The filter input signal should be dc-biased to midsupply or ac-coupled to the terminal.

C. AGND must be biased to midsupply.

0 V

–5 V

10 kΩ

0 V

5 VOC

0.1 µF

1 CLKIN

2 CLKR

8 FILTER IN
6 AGND

10 kΩ

See Note C

V

Nonoverlapping
Clock Generator

Butterworth

Fourth-Order

Low-Pass Filter

CC–

4

φ2φ1

FILTER
OUT

5

Figure 6. External-Clock-Driven Single-Supply Operation

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9

TLC04/MF4A-50, TLC14/MF4A-100
BUTTERWORTH FOURTH-ORDER LOW-PASS
SWITCHED-CAPACITOR FILTERS

SLAS021A – NOVEMBER 1986 – REVISED MARCH 1995

APPLICATION INFORMATION

10 V

3LS

1 CLKIN

R

2 CLKR

V

CC+

7

Level Shift

C

10 kΩ

0.1 µF

8 FILTER IN
6 AGND

10 kΩ

See Note A

f

clock

For VCC = 10 V

f

clock

+

RC In

=

1.69 RC

Nonoverlapping
Clock Generator

φ1

Butterworth

Fourth-Order

Low-Pass Filter

V

CC–

4

1

VCC–V

ǒ

ƪ

VCC–V

IT

1

IT–

)

Ǔǒ

V

IT

)

Ǔ

ƫ

V

IT–

φ2

FILTER
OUT

5

10

NOTE A: AGND must be biased to midsupply.

Figure 7. Self Clocking Through Schmitt-Trigger Oscillator Single-Supply Operation

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TLC04/MF4A-50, TLC14/MF4A-100

BUTTERWORTH FOURTH-ORDER LOW-PASS

SWITCHED-CAPACITOR FILTERS

SLAS021A – NOVEMBER 1986 – REVISED MARCH 1995

APPLICATION INFORMATION

5 V

7

V

3LS

CC+

Level Shift

Clock Input

10 kΩ

–5 V

1 CLKIN

2 CLKR

8 FILTER IN

6 AGND

0.1 µF

Figure 8. DC Offset Adjustment

V

CC–

Nonverlapping

Clock Generator

φ2φ1

Butterworth

Fourth-Order

Low-Pass Filter

4

FILTER
OUT

5

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11

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accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty . Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.

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Copyright  1998, Texas Instruments Incorporated