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PDF LTC1064-3 Data sheet ( Hoja de datos )
| Número de pieza | LTC1064-3 | |
| Descripción | Low Noise/ High Frequency/ 8th Order Butterworth Lowpass Filter | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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LTC1064-3
Low Noise, High Frequency,
8th Order Linear Phase Lowpass Filter
FEATURES
■ 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
■ 60µVRMS Total Wideband Noise
■ 0.03% THD or Better
■ Operates from ±2.37V to ±8V Power Supplies
■ Low Total Output DC Offset
U
APPLICATIO S
■ Antialiasing Filters
■ Smoothing Filters
■ Tracking High Frequency Lowpass Filters
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.
The LTC1064-3 features low wideband noise and low
harmonic distortion even for input voltages up to 3VRMS.
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
mounted SOL package. The LTC1064-3 is fabricated using
LTC’s enhanced analog CMOS Si-gate process.
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.
TYPICAL APPLICATIO
8th Order Clock Sweepable Lowpass Bessel Filter
VIN
8V
0.1µF
1
NC
14
OUT C
2
VIN
13
NC
3
LTC1064-3
AGND
V–
12
4 V+
5
AGND
11
fCLK CLOCK = 7MHz
75/150 10 V+
6
NC
7
INV A
9
VOUT
8
NC
–8V
0.1µF
VOUT
1064 TA01a
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.
Measured Frequency Response
0
–15
–30
–45
–60
–75
–90 VS = ±7.5V, fCLK = 7MHz, PIN 10 TO V+,
f–3dB = 95kHz, GROUP DELAY = 6µs
–105
10 100
FREQUENCY (kHz)
1000
1064-3 TA01b
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1
1 page  
LTC1064-3
TYPICAL PERFOR A CE CHARACTERISTICS
Table 2. Gain/Phase,
VS = ±5V, TA = 25°C,
f –3dB
fCLK =
= 1kHz,
75kHz,
LTC1064-3 Typical Response
Pin 10 at V+ (fltr 75:1)
FREQUENCY (kHz)
GAIN (dB)
PHASE (deg)
0.500
– 0.858
– 90.430
1.000
– 2.990
179.200
1.500
– 6.840
89.600
2.000
– 12.780
3.800
2.500
– 20.800
– 71.000
3.000
– 29.900
– 129.600
3.500
– 38.800
– 173.700
4.000
– 47.100
152.600
4.500
– 54.700
126.000
5.000
– 61.600
103.300
5.500
– 68.000
85.190
6.000
– 73.840
69.060
6.500
– 79.250
54.780
7.000
– 84.230
42.440
7.500
– 88.940
30.060
8.000
– 93.360
21.300
8.500
– 97.510
10.000
9.000
– 100.880
1.520
9.500
– 105.780
– 7.820
Table 3. Gain/Delay,
VS = ±5V, TA = 25°C,
f–3dB = 1kHz,
fCLK = 75kHz,
LTC1064-3
Pin 10 at V
Typical Response
+ (fltr 75:1)
FREQUENCY (kHz)
GAIN (dB)
DELAY (ms)
0.200
– 0.281
0.502
0.300
– 0.420
0.503
0.400
– 0.610
0.503
0.500
– 0.860
0.502
0.600
– 1.160
0.502
0.700
– 1.530
0.502
0.800
– 1.950
0.503
0.900
– 2.430
0.503
1.000
– 2.990
0.500
1.100
– 3.610
0.500
1.200
– 4.300
0.500
1.300
– 5.060
0.498
1.400
– 5.920
0.495
1.500
– 6.830
0.491
1.600
– 7.840
0.489
1.700
– 8.930
0.481
1.800
– 10.130
0.473
1.900
– 11.410
0.465
2.000
– 12.780
0.454
Table 4. Gain/Phase,
VS = ±5V, TA = 25°C,
f –3dB
fCLK =
= 1kHz, LTC1064-3 Typical Response
150kHz, Pin 10 at V– (fltr 150:1)
FREQUENCY (kHz)
GAIN (dB)
PHASE (deg)
0.500
– 0.955
– 88.100
1.000
– 3.380
– 175.300
1.500
– 7.570
99.700
2.000
– 13.770
20.100
2.500
– 21.800
– 48.000
3.000
– 30.700
– 100.700
3.500
– 39.400
– 139.900
4.000
– 47.600
– 169.200
4.500
– 55.100
168.300
5.000
– 61.900
150.300
5.500
– 68.260
135.830
6.000
– 74.050
123.660
6.500
– 79.450
113.440
7.000
– 84.330
104.440
7.500
– 89.010
97.670
8.000
– 93.250
91.580
8.500
– 97.340
84.670
9.000
– 101.390
74.600
9.500
– 104.980
75.990
Table 5. Gain/Delay,
VS = ±5V, TA = 25°C,
f–3dB = 1kHz, LTC1064-3
fCLK = 150kHz, Pin 10 at
Typical Response
V– (fltr 150:1)
FREQUENCY
GAIN (dB)
DELAY (ms)
0.200
– 0.284
0.490
0.300
– 0.450
0.489
0.400
– 0.670
0.489
0.500
– 0.960
0.487
0.600
– 1.310
0.487
0.700
– 1.730
0.485
0.800
– 2.210
0.484
0.900
– 2.750
0.482
1.000
– 3.380
0.478
1.100
– 4.070
0.478
1.200
– 4.820
0.475
1.300
– 5.660
0.470
1.400
– 6.580
0.467
1.500
– 7.570
0.463
1.600
– 8.640
0.456
1.700
– 9.790
0.448
1.800
– 11.050
0.438
1.900
– 12.360
0.428
2.000
– 13.770
0.417
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5 Page 
LTC1064-3
PACKAGE DESCRIPTIO
SW Package
16-Lead Plastic Small Outline (Wide .300 Inch)
(Reference LTC DWG # 05-08-1620)
.030 ±.005
TYP
N
.050 BSC .045 ±.005
.398 – .413
(10.109 – 10.490)
NOTE 4
16 15 14 13 12 11 10
9
N
.420 .325 ±.005
MIN
NOTE 3
.394 – .419
(10.007 – 10.643)
123
N/2
RECOMMENDED SOLDER PAD LAYOUT
.005
(0.127)
RAD MIN
.291 – .299
(7.391 – 7.595)
NOTE 4
.010
(0.254
–
–
.029
0.737)
×
45°
0° – 8° TYP
N/2
123 45678
.093 – .104
(2.362 – 2.642)
.037 – .045
(0.940 – 1.143)
.050
.009 – .013
(0.229 – 0.330)
NOTE 3
.016 – .050
(0.406 – 1.270)
NOTE:
1. DIMENSIONS
IN
INCHES
(MILLIMETERS)
(1.270)
BSC .014 – .019
(0.356 – 0.482)
TYP
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)
.004 – .012
(0.102 – 0.305)
S16 (WIDE) 0502
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-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LTC1064-3.PDF ] | |
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