LTC1064-3_09_技术文档

LTC1064-3

Low Noise, High Frequency,

8th Order Linear Phase Lowpass Filter

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FEATURES

DESCRIPTIO

The LTC^®1064-3 is a monolithic 8th order lowpass Bessel

filter, which provides a linear phase response over its

entire passband. An external TTL or CMOS clock pro-

grams the filter’s cutoff frequency. The clock to cutoff

frequency ratio is 75:1 (Pin 10 at V⁺) or 150:1 (Pin 10 at

V^–) or 120:1 (Pin 10 at GND). The maximum cutoff

frequency is 95kHz. No external components are needed.

■

8th Order Filter in a 14-Pin Package

■

95kHz Maximum Corner Frequency

■

No External Components

75:1, 150:1 and 120:1 Clock to Cutoff Frequency

Ratio

■

60µV_RMSTotal Wideband Noise

0.03% THD or Better

Operates from ±2.37V to ±8V Power Supplies

Low Total Output DC Offset

The LTC1064-3 features low wideband noise and low

harmonic distortion even for input voltages up to 3V_RMS

.

In fact the LTC1064-3 overall performance competes with

equivalent multiple op amp RC active realizations. The

LTC1064-3 is available in a 14-pin DIP or 16-pin surface

mountedSOLpackage.TheLTC1064-3isfabricatedusing

LTC’s enhanced analog CMOS Si-gate process.

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APPLICATIO S

■

Antialiasing Filters

Smoothing Filters

Tracking High Frequency Lowpass Filters

■

The LTC1064-3 is pin compatible with the LTC1064-1,

LTC1064-2 and LTC1064-4.

, LTC and LT are registered trademarks of Linear Technology Corporation.

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TYPICAL APPLICATIO

8th Order Clock Sweepable Lowpass Bessel Filter

Measured Frequency Response

0

1

2

3

4

5

6

7

14

13

12

11

10

9

OUT C

NC

–15

–30

–45

–60

–75

V

IN

V

IN

LTC1064-3

–

–8V

V

AGND

0.1µF

+

CLOCK = 7MHz

V

f

CLK

8V

0.1µF

+

75/150

AGND

NC

V

OUT

V

OUT

8

+

–90

V

–3dB

= ±7.5V, f

= 7MHz, PIN 10 TO V ,

CLK

S

NC

INV A

f

= 95kHz, GROUP DELAY = 6µs

–105

1064 TA01a

100

1000

10

NOTE: THE POWER SUPPLIES SHOULD BE BYPASSED BY A 0.1µF

OR LARGER CAPACITOR CLOSE TO THE PACKAGE. THE CONNECTI0N

BETWEEN PIN 7 AND PIN 14 SHOULD BE MADE UNDER THE IC PACKAGE.

FREQUENCY (kHz)

1064-3 TA01b

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LTC1064-3

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ABSOLUTE AXI U RATI GS ^{(Note 1)}

Total Supply Voltage (V⁺to V^–)............................ 16.5V

Power Dissipation.............................................. 400mW

Storage Temperature Range ................. –65°C to 150°C

Lead Temperature (Soldering, 10 sec).................. 300°C

Operating Temperature Range

LTC1064-3M (OBSOLETE) ............... –55°C to 125°C

LTC1064-3C ....................................... –40°C to 85°C

Input Voltage ........................... (V⁺+0.3V) to V^––0.3V)

Burn-In Voltage ....................................................... 15V

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PACKAGE/ORDER I FOR ATIO

TOP VIEW

ORDER PART

NUMBER

ORDER PART

TOP VIEW

OUT C

NC

1

2

3

4

5

6

7

14

13

12

11

10

9

NUMBER

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

NC

OUT C

NC

V

IN

–

LTC1064-3CN

LTC1064-3CSW

V

IN

AGND

–

+

AGND

V

f

V

CLK

+

V

NC

75/150

AGND

NC

AGND

NC

f

V

CLK

OUT

75/150

NC

R

A

8

IN

NC

N PACKAGE

14-LEAD PDIP

R

A

V

OUT

IN

T_JMAX= 110°C, θ_JA= 70°C/W

SW PACKAGE

J PACKAGE

14-LEAD CERDIP

16-LEAD PLASTIC (WIDE) SO

LTC1064-3MJ

LTC1064-3CJ

T_JMAX= 150°C, θ_JA= 90°C/W

OBSOLETE PACKAGE

Consider the N 14 Package for Alternate Source

Consult LTC Marketing for parts specified with wider operating temperature ranges.

ELECTRICAL CHARACTERISTICS

The ■ denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at T_A= 25°C. V_S= ±7.5V, 75:1, f_CLK= 2MHz, R1 = 10k, TTL or CMOS clock input level

unless otherwise specified.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Passband Gain

Gain TempCo

–3dB Frequency

Referenced to 0dB, 1Hz to 1kHz

■

–0.5

0.15

dB

dB/°C

kHz

dB

0.0002

26.67

13.34

50:1 (f

100:1 (f

/f

= 75)

= 150)

CLK –3dB

/f

CLK –3dB

Gain at –3dB Frequency

Stopband Attenuation

Referenced to 0dB, f = 26.67/13.34kHz

■

–3.8

–25

–56

–2.75

IN

At 3f

At 5f

At 7f

–29

–60

–84

dB

–3dB

Input Frequency Range

100:1

50:1

0

<f /2

kHz

CLK

<f

CLK

Output Voltage Swing and

Operating Input Voltage Range

V = ±2.37V

■

±1.1

±3.1

±5

V

S

V = ±5V

S

V = ±7.5V

S

Total Harmonic Distortion

Wideband Noise

V = ±5V, Input = 1V

V = ±7.5V, Input = 3V

S

at 1kHz

RMS

0.015

0.03

%

S

at 1kHz

RMS

V = ±5V, Input = GND 1Hz – 1.99MHz

55

60

µV

S

RMS

V = ±7.5V, Input = GND 1Hz – 1.99MHz

S

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LTC1064-3

ELECTRICAL CHARACTERISTICS

unless otherwise specified.

The ■ denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at T_A= 25°C. V_S= ±7.5V, 75:1, f_CLK= 2MHz, R1 = 10k, TTL or CMOS clock input level

PARAMETER

CONDITIONS

V = ±7.5V

MIN

TYP

MAX

UNITS

Output DC Offset

Output DC Offset TempCo

±30

±20

±50

±150

mV

µV/°C

S

V = ±5V

S

V = ±7.5V

S

Input Impedance

14

22

2

kΩ

Ω

Output Impedance

f

= 10kHz

OUT

Output Short-Circuit Current

Clock Feedthrough

Source/Sink

3/1

200

mA

µV

RMS

Maximum Clock Frequency

V ≥ ±7V, 50% Duty Cycle

V ≥ ±7V, 50% Duty Cycle, T = <55°C

S

5

7

MHz

S

A

Power Supply Current

V = ±2.37V, f

= 1MHz

CLK

= 1MHz

■

10

12

22

23

26

28

32

mA

S

V = ±5V, f

S

CLK

V = ±7.5V, f

S

= 1MHz

CLK

16

■

Power Supply Voltage Range

±2.37

±8

V

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

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TYPICAL PERFOR A CE CHARACTERISTICS

Gain vs Frequency

Phase vs Frequency

Group Delay

–45

0

15

0

110

100

90

80

70

60

50

40

30

20

10

0

V

T

= ±7.5V

= 25°C

V

T

= ±7.5V

S

A

S

A

f

= 7MHz

–3dB

CLK

= 25°C

= 95kHz

f

= 750kHz

45

CLK

–3dB

= 10kHz

–15

–30

–45

–60

–75

–90

–105

f

= 2MHz

–3dB

90

CLK

= 26.67kHz

135

180

225

270

315

360

405

450

f

= 5MHz

–3dB

CLK

f

= 750kHz, f = 10kHz

–3dB

CLK

= 66.67kHz

f

= 2MHz, f

= 5MHz, f

= 26.67kHz

= 66.67kHz

CLK

–3dB

V

A

= ±7.5V

= 25°C

S

CLK

–3dB

T

10k

100k

FREQUENCY (Hz)

1M

0

2

4

6

8

10 12 14 16 18 20 22

0

2

4

6

8

10 12 14 16 18 20 22

FREQUENCY (kHz)

1064 G01

1064 G02

1064 G03

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LTC1064-3

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TYPICAL PERFOR A CE CHARACTERISTICS

Power Supply Current vs Power

Supply Voltage

Phase Matching

Total Harmonic Distortion

1.0

0.1

48

44

40

36

32

28

24

20

16

12

8

2.2

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

f

= 1MHz

f

= 1.5MHz, 75:1

CLK

= 20kHz

–3dB

V

f

–3dB

= ±7.5V

CLK

S

= 1.5MHz

CLK

f

= 20kHz

50 UNIT SAMPLE (T = 25°C TO 125°C)

A

V

= ±5V

S

T

A

T

A

T

A

= –55°C

= 25°C

V

= ±2.37V

S

= 125°C

V

)

= ±7.5V

S

4

0.01

0

2

4

6

8

10 12 14 16 18 20 22

0.1

1

10

0

2

4

6 8 10 12 14 16 18 20 22 24

INPUT LEVELS (V

TOTAL POWER SUPPLY VOLTAGE (V)

FREQUENCY (kHz)

RMS

1064 G05

1064 G04

1064 G06

Transient Response

Input 10V_P-PSquare Wave

V_S= ±7.5V, Pin 10 to V⁺,

f_CLK= 1.5MHz

Table 1. Wideband Noise (µV_RMS

)

V = ±2.37V V = ±5V

V = ±7.5V

S

Noise

µV

Noise

µV

RMS

Pin 10 to

f

/f

µV

RMS

CLK –3dB

RMS

+

V

75/1

150/1

120/1

50

52

45

55

60

–

V

58

50

62

54

GND

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LTC1064-3

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TYPICAL PERFOR A CE CHARACTERISTICS

Table 2. Gain/Phase, f_–3dB= 1kHz, LTC1064-3 Typical Response

Table 3. Gain/Delay, f_–3dB= 1kHz, LTC1064-3 Typical Response

V_S= ±5V, T_A= 25°C, f_CLK= 75kHz, Pin 10 at V⁺(fltr 75:1)

FREQUENCY (kHz)

0.500

GAIN (dB)

– 0.858

PHASE (deg)

–90.430

179.200

89.600

FREQUENCY (kHz)

0.200

GAIN (dB)

– 0.281

– 0.420

– 0.610

– 0.860

– 1.160

– 1.530

– 1.950

– 2.430

– 2.990

– 3.610

– 4.300

– 5.060

– 5.920

– 6.830

– 7.840

– 8.930

– 10.130

– 11.410

– 12.780

DELAY (ms)

0.502

0.503

0.502

0.503

0.500

0.498

0.495

0.491

0.489

0.481

0.473

0.465

0.454

1.000

– 2.990

0.300

1.500

– 6.840

0.400

2.000

– 12.780

– 20.800

– 29.900

– 38.800

– 47.100

– 54.700

– 61.600

– 68.000

– 73.840

– 79.250

– 84.230

– 88.940

– 93.360

– 97.510

–100.880

–105.780

3.800

0.500

2.500

–71.000

–129.600

–173.700

152.600

126.000

103.300

85.190

0.600

3.000

0.700

3.500

0.800

4.000

0.900

4.500

1.000

5.000

1.100

5.500

1.200

6.000

69.060

1.300

6.500

54.780

1.400

7.000

42.440

1.500

7.500

30.060

1.600

8.000

21.300

1.700

8.500

10.000

1.800

9.000

1.520

1.900

9.500

–7.820

2.000

Table 4. Gain/Phase, f_–3dB= 1kHz, LTC1064-3 Typical Response

Table 5. Gain/Delay, f_–3dB= 1kHz, LTC1064-3 Typical Response

V_S= ±5V, T_A= 25°C, f_CLK= 150kHz, Pin 10 at V^–(fltr 150:1)

FREQUENCY (kHz)

0.500

GAIN (dB)

– 0.955

PHASE (deg)

– 88.100

–175.300

99.700

FREQUENCY

0.200

0.300

0.400

0.500

0.600

0.700

0.800

0.900

1.000

1.100

1.200

1.300

1.400

1.500

1.600

1.700

1.800

1.900

2.000

GAIN (dB)

– 0.284

– 0.450

– 0.670

– 0.960

– 1.310

– 1.730

–2.210

–2.750

–3.380

– 4.070

– 4.820

– 5.660

– 6.580

– 7.570

– 8.640

– 9.790

– 11.050

– 12.360

– 13.770

DELAY (ms)

0.490

0.489

0.487

0.485

0.484

0.482

0.478

0.475

0.470

0.467

0.463

0.456

0.448

0.438

0.428

0.417

1.000

– 3.380

1.500

– 7.570

2.000

– 13.770

– 21.800

– 30.700

– 39.400

– 47.600

– 55.100

– 61.900

– 68.260

– 74.050

– 79.450

– 84.330

– 89.010

– 93.250

– 97.340

– 101.390

– 104.980

20.100

2.500

– 48.000

–100.700

–139.900

–169.200

168.300

150.300

135.830

123.660

113.440

104.440

97.670

3.000

3.500

4.000

4.500

5.000

5.500

6.000

6.500

7.000

7.500

8.000

91.580

8.500

84.670

9.000

74.600

9.500

75.990

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LTC1064-3

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TYPICAL PERFOR A CE CHARACTERISTICS

Table 6. Gain/Phase, f_–3dB= 1kHz, LTC1064-3 Typical Response

Table 7. Gain/Delay, f_–3dB= 1kHz, LTC1064-3 Typical Response

V_S= ±5V, T_A= 25°C, f_CLK= 120kHz, Pin 10 at GND (fltr 120:1)

FREQUENCY (kHz)

0.500

GAIN (dB)

–0.994d

–3.050

PHASE (deg)

–82.210

–162.800

116.700

40.200

FREQUENCY (kHz)

0.200

GAIN (dB)

–0.354

–0.520

–0.730

–1.000

–1.320

–1.670

–2.090

–2.540

–3.050

–3.600

–4.220

–4.900

–5.670

–6.520

–7.470

–8.500

–9.650

–10.870

–12.180

DELAY (ms)

0.458

0.456

0.454

0.452

0.449

0.448

0.446

0.445

0.446

0.449

0.448

0.447

0.446

0.441

0.432

0.422

0.409

0.395

1.000

0.300

1.500

–6.520

0.400

2.000

–12.180

–19.460

–27.200

–34.700

–41.900

–48.700

–55.100

–60.900

–66.500

–71.660

–76.390

–80.910

–84.900

–88.750

–92.410

–98.290

0.500

2.500

–23.600

–74.000

–114.200

–146.800

–173.300

164.700

145.800

130.610

117.130

105.880

96.140

0.600

3.000

0.700

3.500

0.800

4.000

0.900

4.500

1.000

5.000

1.100

5.500

1.200

6.000

1.300

6.500

1.400

7.000

1.500

7.500

1.600

8.000

87.510

1.700

8.500

81.380

1.800

9.000

78.190

1.900

9.500

52.860

2.000

Table 8. Gain/Phase, f_–3dB= 20kHz, LTC1064-3 Typical

Response V_S= ±7.5V, f_CLK= 1.5MHz, Pin 10 at V⁺(fltr 75:1)

T = 25°C

A

T = 125°C

A

FREQUENCY (kHz)

10.000

GAIN (dB)

PHASE (deg)

–92.270

176.000

85.500

FREQUENCY (kHz)

10.000

GAIN (dB)

–0.944

PHASE (deg)

–92.880

175.500

85.700

–0.912

–3.090

20.000

–3.170

30.000

–6.910

30.000

–6.910

40.000

–12.710

–20.500

–29.400

–38.300

–46.500

–54.000

–61.000

–67.310

–73.170

–78.600

–83.760

–88.630

–1.200

40.000

–12.450

–19.920

–28.500

–37.200

–45.300

–52.700

–59.600

–65.900

–71.750

–77.170

–82.370

–87.400

–0.600

50.000

–77.800

–138.700

174.600

138.300

109.100

84.800

50.000

–78.000

–140.700

170.500

132.200

100.900

74.900

60.000

70.000

80.000

90.000

100.000

110.000

120.000

130.000

140.000

150.000

100.000

110.000

120.000

130.000

140.000

150.000

64.040

52.600

46.260

32.850

31.120

15.840

18.050

1.130

7.770

–11.380

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LTC1064-3

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PI FU CTIO S ^{(Pin Numbers Refer to the 14-Pin Package)}

NC(Pins1,6,8and13):The“noconnection”pinsshould

be preferably grounded. These pins are not internally

connected.

R_INA,OUTC(Pins7,14):Averyshortconnectionbetween

Pin 7 and Pin 14 is recommended. This connection should

be preferably done under the IC package. In a breadboard,

use a one inch, or less, shielded coaxial cable: the shield

should be grounded. In a PC board, use a one inch trace or

less; surround the trace by a ground plane.

V_IN, V_OUT(Pins 2, 9): The input Pin 2 is connected to an

18k resistor tied to the inverting input of an op amp. Pin 2

isprotectedagainststaticdischarge. Thedevice’soutput,

Pin 9, is the output of an op amp which can typically

source/sink3mA/1mA. Althoughtheinternalopampsare

unity gain stable, driving long coax cables is not recom-

mended.

50/100 (Pin 10): Ratio Pin.The DC level at this pin deter-

mines the ratio of clock frequency to the –3dB frequency of

the filter. The ratio is 75:1 when Pin 10 is at V⁺, 120:1 when

Pin 10 is at GND and 150:1 when Pin 10 is at V^–. This pin

should be bypassed with a 0.1µF capacitor to analog

ground when it’s connected to V^–or V⁺(Figure 1). See

Tables 2 through 8 for typical gain and delay responses for

the three ratios.

When testing the device for noise and distortion, the

output, Pin 9, should be buffered (Figure 1). The op amp

power supply wire (or trace) should be connected

directly to the power source. To eliminate switching

transients from filter output, buffer filter output with a

third order lowpass (see Figure 5).

f_CLK(Pin 11): For ±5V supplies the logic threshold level is

1.4V. For ±8V and 0V to 5V supplies the logic threshold

levels are 2.2V and 3V respectively. The logic threshold

levels vary ±100mV over the full military temperature

range. The recommended duty cycle of the input clock is

50% although for clock frequencies below 500kHz the

clock “on” time can be as low as 200ns. The maximum

clock frequency for ±5V supplies is 4MHz. For ±7V sup-

plies and above, the maximum clock frequency is 7MHz.

Do not allow the clock levels to exceed the power supplies.

For single supply operation ≥6V use level shifting at Pin 11

with T²L levels (see Figure 4).

AGND (Pins 3, 5): For dual supply operation these pins

should be connected to a ground plane. For single supply

operation both pins should be tied to one half supply

(Figure 3).

V⁺, V^–(Pins 4, 12): Should be bypassed with a 0.1µF

capacitor to an adequate analog ground. Low noise,

nonswitchingpowersuppliesarerecommended.Toavoid

latchup when the power supplies exhibit high turn-on

transients, a 1N5817 Schottky diode should be added

from the V⁺and V^–pins to ground (Figure 1, 2 and 3).

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LTC1064-3

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TYPICAL APPLICATIO S

POWER SOURCE

1

2

3

4

5

6

7

1

2

3

4

5

6

7

14

13

12

11

10

9

14

13

12

11

10

9

OUT C

+

–

OUT C

NC

V

NC

V

IN

V

NC

V

IN

LTC1064-3

–

V

AGND

V

AGND

0.1µF

1N5817

V

+

f

V

f

V

CLK

0.1µF

10k

0.1µF

1N5817

0.1µF

+

–

75/150

V /V

AGND

NC

75/150

AGND

10k

V

NC

–

+

OUT

0.1µF

8

V

OUT

INV A

NC

INV A

NC

1064-3 F02

1064-3 F01

RECOMMENDED OP AMPS:

LT1022, LT318, LT1056

0.1µF

Figure 2. Using Schottky Diodes to Protect

the IC from Power Supply Reversal

Figure 1. Buffering the Filter Output. The Buffer Op Amp

Should Not Share the LTC1064-3 Power Lines

1

2

3

4

5

6

7

1

2

3

4

5

6

7

14

13

12

11

10

9

14

13

12

11

10

9

NC

OUT C

NC

OUT C

NC

+

V

IN

V

IN

V

IN

LTC1064-3

–

AGND

V

2.2k

2

f

CLK

T L

+

V = 15V

V

f

CLK

0V TO 10V

LEVEL

0.1µF

1µF

5k

AGND

NC

AGND

NC

RATIO

5k

75/150

V

OUT

V

OUT

V

OUT

+

V /2

8

5k

0.1µF

5k

INV A

NC

1064-3 F04

1064-3 F03

Figure 3. Single Supply Operation. If Fast Power Up

or Down Transients are Expected, Use a 1N5817

Schottky Diode Between Pin 4 and Pin 5

Figure 4. Level Shifting the Input T²L Clock

for Single Supply Operation ≥6V

1

2

3

4

5

6

7

14

13

12

11

10

9

NC

OUT C

NC

V

IN

+

IN

–

V

+

LTC1064-3

–

AGND

V

10k

0.1µF

V

+

OUT

V

f

CLK

200pF

0.1µF

–

AGND

NC

V /GND/V

75/150

4.99k

V

–

OUT

50Ω

8

LT1056

INV A

430pF

NC

0.027µF

+

1064-3 F05

Figure 5. Adding an Output Buffer-Filter to Eliminate Any Clock

Feedthrough. Passband ±0.1dB to 50kHz, –3dB at 94kHz

10643fa

8

LTC1064-3

U

PACKAGE DESCRIPTIO

J Package

14-Lead CERDIP (Narrow 0.300, Hermetic)

(LTC DWG # 05-08-1110)

.785

(19.939)

MAX

.005

(0.127)

MIN

14

13

12

11

10

9

8

.220 – .310

(5.588 – 7.874)

.025

(0.635)

RAD TYP

2

3

4

5

6

1

7

.200

(5.080)

MAX

.300 BSC

(7.62 BSC)

.015 – .060

(0.381 – 1.524)

.008 – .018

(0.203 – 0.457)

0° – 15°

.045 – .065

(1.143 – 1.651)

.100

(2.54)

BSC

.125

(3.175)

MIN

.014 – .026

NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE

OR TIN PLATE LEADS

(0.360 – 0.660)

J14 0801

OBSOLETE PACKAGE

10643fa

9

LTC1064-3

U

PACKAGE DESCRIPTIO

N Package

14-Lead PDIP (Narrow 0.300)

(LTC DWG # 05-08-1510)

.770*

(19.558)

MAX

14

13

12

11

10

9

8

7

.255 ± .015*

(6.477 ± 0.381)

1

2

3

5

6

4

.300 – .325

(7.620 – 8.255)

.045 – .065

(1.143 – 1.651)

.130 ± .005

(3.302 ± 0.127)

.020

(0.508)

MIN

.065

(1.651)

TYP

.008 – .015

(0.203 – 0.381)

+.035

.325

.005

(0.125)

MIN

–.015

.120

(3.048)

MIN

.018 ± .003

(0.457 ± 0.076)

.100

(2.54)

BSC

+0.889

8.255

(

)

–0.381

NOTE:

INCHES

MILLIMETERS

N14 1002

1. DIMENSIONS ARE

*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.

MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)

10643fa

10

LTC1064-3

U

PACKAGE DESCRIPTIO

SW Package

16-Lead Plastic Small Outline (Wide .300 Inch)

(Reference LTC DWG # 05-08-1620)

.050 BSC .045 ±.005

.030 ±.005

.398 – .413

(10.109 – 10.490)

NOTE 4

TYP

15 14

12

10

9

N

16

N

13

11

.325 ±.005

.420

MIN

.394 – .419

(10.007 – 10.643)

NOTE 3

N/2

8

1

2

3

N/2

RECOMMENDED SOLDER PAD LAYOUT

2

3

5

7

1

4

6

.291 – .299

(7.391 – 7.595)

NOTE 4

.037 – .045

(0.940 – 1.143)

.093 – .104

(2.362 – 2.642)

.010 – .029

× 45°

(0.254 – 0.737)

.005

(0.127)

RAD MIN

0° – 8° TYP

.050

(1.270)

BSC

.004 – .012

.009 – .013

(0.102 – 0.305)

NOTE 3

(0.229 – 0.330)

.014 – .019

.016 – .050

(0.356 – 0.482)

TYP

(0.406 – 1.270)

NOTE:

1. DIMENSIONS IN

INCHES

(MILLIMETERS)

S16 (WIDE) 0502

2. DRAWING NOT TO SCALE

3. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.

THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS

4. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.

MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)

10643fa

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.

11

LTC1064-3

U

TYPICAL APPLICATIO S

1

2

3

4

5

6

7

f

14

13

12

11

10

9

Amplitude Response

CLK

55

NC

V

: f

=

OUT C

OUT1 –3dB

V

NC

IN1

IN

LTC1064-3

–

AGND

–7.5V

0.1µF

V

+

V

f

= 1MHz

f

7.5V

CLK

0.1µF

AGND

NC

75/150

f

CLK

110

V

: f

=

OUT

OUT2 –3dB

8

INV A

V

NC

IN2

1064-3 F06

Figure 6. Dual 4th Order Bessel Filters. V_S= ±7.5V,

f_CLK= 1MHz, Pin 10 to GND. f_–3dB= 9kHz and 18kHz

RELATED PARTS

PART NUMBER

LTC1069-7

LTC1563

DESCRIPTION

COMMENTS

8th Order Linear Phase Lowpass

Active RC, 4th Order Bessel Lowpass

DC Accurate, 10th Order Lowpass

S0-8 Package

Continuous Time, Resistor Programmable Cutoff

Linear Phase, Internal Precision Clock, S0-8 Package

LTC1569-6

LTC1569-7

10643fa

LW/TP 1202 1K REV A • PRINTED IN USA

12 ^{LinearTechnology Corporation}

1630 McCarthy Blvd., Milpitas, CA 95035-7417

■

(408) 432-1900 FAX: (408) 434-0507 www.linear.com

 LINEAR TECHNOLOGY CORPORATION 1989


型号：	LTC1064-3_09
厂家：	Linear
描述：	Low Noise, High Frequency, 8th Order Linear Phase Lowpass Filter 低噪声，高频率， 8阶线性相位低通滤波器
文件：	总12页 (文件大小：146K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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