LINER LTC1064-3 Low noise, high frequency, 8th order linear phase lowpass filter Datasheet

LTC1064-3
Low Noise, High Frequency,
8th Order Linear Phase Lowpass Filter
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FEATURES
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DESCRIPTIO
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
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APPLICATIO S
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Antialiasing Filters
Smoothing Filters
Tracking High Frequency Lowpass Filters
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 programs 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.
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TYPICAL APPLICATIO
8th Order Clock Sweepable Lowpass Bessel Filter
VIN
2
3
4
8V
0.1µF
5
6
7
NC
OUT C
VIN
NC
14
13
–15
LTC1064-3
12
V–
AGND
V+
AGND
NC
INV A
fCLK
75/150
VOUT
NC
11
–8V
CLOCK = 7MHz
0.1µF
10 +
V
9
VOUT
8
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.
–30
VOUT/VIN (dB)
1
Measured Frequency Response
0
–45
–60
–75
–90 VS = ±7.5V, fCLK = 7MHz, PIN 10 TO V +,
f –3dB = 95kHz, GROUP DELAY = 6µs
–105
100
10
1000
FREQUENCY (kHz)
1064-3 TA01b
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LTC1064-3
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AXI U
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ABSOLUTE
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
ORDER PART
NUMBER
TOP VIEW
NC
1
14 OUT C
VIN
2
13 NC
3
V–
AGND
12
V+
4
11 fCLK
AGND
5
10 75/150
NC
RIN A
6
9
7
8
LTC1064-3CN
VOUT
NC
N PACKAGE
14-LEAD PDIP
TJMAX = 110°C, θJA = 70°C/W
J PACKAGE
14-LEAD CERDIP
LTC1064-3MJ
LTC1064-3CJ
OBSOLETE PACKAGE
ORDER PART
NUMBER
TOP VIEW
NC
1
16 OUT C
VIN
2
15 NC
AGND
3
14 V –
V+
4
13 NC
AGND
5
12 fCLK
NC
6
11 75/150
NC
7
10 NC
RIN A
8
9
LTC1064-3CSW
VOUT
SW PACKAGE
16-LEAD PLASTIC (WIDE) SO
TJMAX = 150°C, θJA = 90°C/W
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 TA = 25°C. VS = ±7.5V, 75:1, fCLK = 2MHz, R1 = 10k, TTL or CMOS clock input level
unless otherwise specified.
PARAMETER
CONDITIONS
Passband Gain
Gain TempCo
–3dB Frequency
Referenced to 0dB, 1Hz to 1kHz
Gain at –3dB Frequency
Stopband Attenuation
Stopband Attenuation
Stopband Attenuation
50:1 (fCLK /f –3dB = 75)
100:1 (fCLK /f –3dB = 150)
Referenced to 0dB, fIN = 26.67/13.34kHz
At 3f –3dB
At 5f –3dB
At 7f –3dB
Input Frequency Range
100:1
50:1
Output Voltage Swing and
Operating Input Voltage Range
VS = ±2.37V
VS = ±5V
VS = ±7.5V
Total Harmonic Distortion
VS = ±5V, Input = 1VRMS at 1kHz
VS = ±7.5V, Input = 3VRMS at 1kHz
Wideband Noise
VS = ±5V, Input = GND 1Hz – 1.99MHz
VS = ±7.5V, Input = GND 1Hz – 1.99MHz
MIN
●
TYP
–0.5
MAX
UNITS
0.15
dB
dB/°C
kHz
kHz
dB
dB
dB
dB
0.0002
26.67
13.34
●
●
●
–3.8
–25
–56
–2.75
–29
–60
–84
0
0
●
●
●
<fCLK/2
<fCLK
kHz
kHz
V
V
V
±1.1
±3.1
±5
0.015
0.03
55
60
%
%
µVRMS
µVRMS
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LTC1064-3
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = ±7.5V, 75:1, fCLK = 2MHz, R1 = 10k, TTL or CMOS clock input level
unless otherwise specified.
PARAMETER
CONDITIONS
Output DC Offset
Output DC Offset TempCo
VS = ±7.5V
VS = ±5V
VS = ±7.5V
MIN
Input Impedance
TYP
MAX
UNITS
± 30
± 20
±50
±150
mV
µV/°C
µV/°C
14
22
kΩ
Output Impedance
f OUT = 10kHz
2
Ω
Output Short-Circuit Current
Source/Sink
3/1
mA
200
µVRMS
Clock Feedthrough
Maximum Clock Frequency
VS ≥ ±7V, 50% Duty Cycle
VS ≥ ±7V, 50% Duty Cycle, TA = <55°C
Power Supply Current
VS = ±2.37V, f CLK = 1MHz
VS = ±5V, f CLK = 1MHz
10
12
●
●
VS = ±7.5V, f CLK = 1MHz
16
●
Power Supply Voltage Range
●
±2.37
5
7
MHz
MHz
22
23
26
28
32
mA
mA
mA
mA
mA
±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
–60
180
225
270
315
–75
–90
135
VS = ±7.5V
TA = 25°C
–105
10k
1M
1064 G01
90
80
70
60
fCLK = 750kHz, f–3dB = 10kHz
50
40
30
360
20
405
10
450
100k
FREQUENCY (Hz)
VS = ±7.5V
TA = 25°C
100
GROUP DELAY (µs)
90
fCLK = 5MHz
f –3dB = 66.67kHz
–45
VS = ±7.5V
TA = 25°C
f CLK = 750kHz
f–3dB = 10kHz
45
fCLK = 2MHz
f –3dB = 26.67kHz
PHASE (DEG)
GAIN (dB)
–30
110
0
fCLK = 7MHz
f –3dB = 95kHz
0
–15
Group Delay
–45
15
0
2
4
6
8 10 12 14 16 18 20 22
FREQUENCY (kHz)
1064 G02
0
fCLK = 2MHz, f–3dB = 26.67kHz
fCLK = 5MHz, f–3dB = 66.67kHz
0
2
4
6
8 10 12 14 16 18 20 22
FREQUENCY (kHz)
1064 G03
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LTC1064-3
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TYPICAL PERFOR A CE CHARACTERISTICS
1.0
2.2
VS = ±7.5V
2.0 fCLK = 1.5MHz
1.8 f –3dB = 20kHz
50 UNIT SAMPLE (TA = 25°C TO 125°C)
1.6
DISTORTION (%)
PHASE MATCH (±DEG)
Power Supply Current vs Power
Supply Voltage
Total Harmonic Distortion
1.4
1.2
1.0
0.8
48
fCLK = 1.5MHz, 75:1
f –3dB = 20kHz
44
POWER SUPPLY CURRENT (mA)
Phase Matching
VS = ±5V
0.1
VS = ±2.37V
0.6
0.4
VS = ±7.5V
0.2
0
0
2
4
6
8 10 12 14 16 18 20 22
FREQUENCY (kHz)
0.01
0.1
1
INPUT LEVELS (VRMS)
40
36
32
28
24
TA = –55°C
20
TA = 25°C
16
TA = 125°C
12
8
4
0
10
1064 G05
1064 G04
fCLK = 1MHz
0 2 4 6 8 10 12 14 16 18 20 22 24
TOTAL POWER SUPPLY VOLTAGE (V)
1064 G06
Transient Response
Input 10VP-P Square Wave
VS = ±7.5V, Pin 10 to V +,
f CLK = 1.5MHz
Table 1. Wideband Noise (µVRMS)
Pin 10 to
fCLK /f –3dB
VS = ±2.37V
VS = ±5V
VS = ±7.5V
Noise
µVRMS
Noise
µVRMS
Noise
µVRMS
V+
75/1
50
55
60
V–
150/1
52
58
62
GND
120/1
45
50
54
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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
VS = ±5V, TA = 25°C, fCLK = 75kHz, Pin 10 at V + (fltr 75:1)
PHASE (deg)
Table 3. Gain/Delay, f –3dB = 1kHz, LTC1064-3 Typical Response
VS = ±5V, TA = 25°C, fCLK = 75kHz, Pin 10 at V + (fltr 75:1)
FREQUENCY (kHz)
GAIN (dB)
FREQUENCY (kHz)
GAIN (dB)
DELAY (ms)
0.500
– 0.858
–90.430
0.200
– 0.281
0.502
1.000
– 2.990
179.200
0.300
– 0.420
0.503
1.500
– 6.840
89.600
0.400
– 0.610
0.503
2.000
– 12.780
3.800
0.500
– 0.860
0.502
2.500
– 20.800
–71.000
0.600
– 1.160
0.502
3.000
– 29.900
–129.600
0.700
– 1.530
0.502
3.500
– 38.800
–173.700
0.800
– 1.950
0.503
4.000
– 47.100
152.600
0.900
– 2.430
0.503
4.500
– 54.700
126.000
1.000
– 2.990
0.500
5.000
– 61.600
103.300
1.100
– 3.610
0.500
5.500
– 68.000
85.190
1.200
– 4.300
0.500
6.000
– 73.840
69.060
1.300
– 5.060
0.498
6.500
– 79.250
54.780
1.400
– 5.920
0.495
7.000
– 84.230
42.440
1.500
– 6.830
0.491
7.500
– 88.940
30.060
1.600
– 7.840
0.489
8.000
– 93.360
21.300
1.700
– 8.930
0.481
8.500
– 97.510
10.000
1.800
– 10.130
0.473
9.000
–100.880
1.520
1.900
– 11.410
0.465
9.500
–105.780
–7.820
2.000
– 12.780
0.454
Table 4. Gain/Phase, f –3dB = 1kHz, LTC1064-3 Typical Response
VS = ±5V, TA = 25°C, fCLK = 150kHz, Pin 10 at V – (fltr 150:1)
Table 5. Gain/Delay, f–3dB = 1kHz, LTC1064-3 Typical Response
VS = ±5V, TA = 25°C, fCLK = 150kHz, Pin 10 at V– (fltr 150:1)
FREQUENCY (kHz)
GAIN (dB)
PHASE (deg)
FREQUENCY
GAIN (dB)
DELAY (ms)
0.500
– 0.955
– 88.100
0.200
– 0.284
0.490
1.000
– 3.380
–175.300
0.300
– 0.450
0.489
1.500
– 7.570
99.700
0.400
– 0.670
0.489
2.000
– 13.770
20.100
0.500
– 0.960
0.487
2.500
– 21.800
– 48.000
0.600
– 1.310
0.487
3.000
– 30.700
–100.700
0.700
– 1.730
0.485
3.500
– 39.400
–139.900
0.800
–2.210
0.484
4.000
– 47.600
–169.200
0.900
–2.750
0.482
4.500
– 55.100
168.300
1.000
–3.380
0.478
5.000
– 61.900
150.300
1.100
– 4.070
0.478
5.500
– 68.260
135.830
1.200
– 4.820
0.475
6.000
– 74.050
123.660
1.300
– 5.660
0.470
6.500
– 79.450
113.440
1.400
– 6.580
0.467
7.000
– 84.330
104.440
1.500
– 7.570
0.463
7.500
– 89.010
97.670
1.600
– 8.640
0.456
8.000
– 93.250
91.580
1.700
– 9.790
0.448
8.500
– 97.340
84.670
1.800
– 11.050
0.438
9.000
– 101.390
74.600
1.900
– 12.360
0.428
9.500
– 104.980
75.990
2.000
– 13.770
0.417
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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
VS = ±5V, TA = 25°C, fCLK = 120kHz, Pin 10 at GND (fltr 120:1)
Table 7. Gain/Delay, f–3dB = 1kHz, LTC1064-3 Typical Response
VS = ±5V, TA = 25°C, fCLK = 120kHz, Pin 10 at GND (fltr 120:1)
FREQUENCY (kHz)
GAIN (dB)
PHASE (deg)
FREQUENCY (kHz)
GAIN (dB)
DELAY (ms)
0.500
–0.994d
–82.210
0.200
–0.354
0.458
1.000
–3.050
–162.800
0.300
–0.520
0.456
1.500
–6.520
116.700
0.400
–0.730
0.454
2.000
–12.180
40.200
0.500
–1.000
0.452
2.500
–19.460
–23.600
0.600
–1.320
0.449
3.000
–27.200
–74.000
0.700
–1.670
0.448
3.500
–34.700
–114.200
0.800
–2.090
0.446
4.000
–41.900
–146.800
0.900
–2.540
0.446
4.500
–48.700
–173.300
1.000
–3.050
0.445
5.000
–55.100
164.700
1.100
–3.600
0.446
5.500
–60.900
145.800
1.200
–4.220
0.449
6.000
–66.500
130.610
1.300
–4.900
0.448
6.500
–71.660
117.130
1.400
–5.670
0.447
7.000
–76.390
105.880
1.500
–6.520
0.446
7.500
–80.910
96.140
1.600
–7.470
0.441
8.000
–84.900
87.510
1.700
–8.500
0.432
8.500
–88.750
81.380
1.800
–9.650
0.422
9.000
–92.410
78.190
1.900
–10.870
0.409
9.500
–98.290
52.860
2.000
–12.180
0.395
Table 8. Gain/Phase, f–3dB = 20kHz, LTC1064-3 Typical
Response VS = ±7.5V, fCLK = 1.5MHz, Pin 10 at V+(fltr 75:1)
TA = 25°C
FREQUENCY (kHz)
GAIN (dB)
10.000
–0.912
20.000
30.000
40.000
–12.710
TA = 125°C
PHASE (deg)
FREQUENCY (kHz)
GAIN (dB)
PHASE (deg)
–92.270
10.000
–0.944
–92.880
–3.090
176.000
20.000
–3.170
175.500
–6.910
85.500
30.000
–6.910
85.700
–1.200
40.000
–12.450
–0.600
50.000
–20.500
–77.800
50.000
–19.920
–78.000
60.000
–29.400
–138.700
60.000
–28.500
–140.700
70.000
–38.300
174.600
70.000
–37.200
170.500
80.000
–46.500
138.300
80.000
–45.300
132.200
90.000
–54.000
109.100
90.000
–52.700
100.900
100.000
–61.000
84.800
100.000
–59.600
74.900
110.000
–67.310
64.040
110.000
–65.900
52.600
120.000
–73.170
46.260
120.000
–71.750
32.850
130.000
–78.600
31.120
130.000
–77.170
15.840
140.000
–83.760
18.050
140.000
–82.370
1.130
150.000
–88.630
7.770
150.000
–87.400
–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 (Pins 1, 6, 8 and 13): The “no connection” pins should
be preferably grounded. These pins are not internally
connected.
VIN, VOUT (Pins 2, 9): The input Pin 2 is connected to an
18k resistor tied to the inverting input of an op amp. Pin 2
is protected against static discharge. The device’s output,
Pin 9, is the output of an op amp which can typically
source/sink 3mA/1mA. Although the internal op amps are
unity gain stable, driving long coax cables is not recommended.
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).
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,
nonswitching power supplies are recommended. To avoid
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).
RIN A, OUT C (Pins 7, 14): A very short connection between
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.
50/100 (Pin 10): Ratio Pin.The DC level at this pin determines 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.
fCLK (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 supplies 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).
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LTC1064-3
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TYPICAL APPLICATIO S
1
POWER SOURCE
V+
V–
OUT C 14
NC
1
2
13
NC
VIN
LTC1064-3
3
12
V–
AGND
VIN
4
0.1µF 5
6
V+
fCLK
75/150
AGND
VOUT
NC
7 INV A
NC
2
VIN
0.1µF
11
10
V+
0.1µF
10k
9
10k
8
0.1µF
NC
13
4
V+
fCLK
75/150
AGND
VOUT
NC
7
VOUT
VIN
14
LTC1064-3
12
V–
AGND
6
–
OUT C
3
5
0.1µF
1N5817
V +/V –
NC
NC
INV A
V–
11
0.1µF
1N5817
10
9
VOUT
8
+
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
VIN
V+= 15V
0.1µF
0.1µF
NC
13
4
V+
7
5k
VIN
fCLK
AGND
75/150
NC
VOUT
INV A
NC
1
14
LTC1064-3
12
AGND
V–
6
V+/2
OUT C
3
5
5k
NC
11
fCLK
V+
0V TO 10V
10
9
2
VIN
8
0.1µF
NC
13
4
V+
7
5k
VIN
14
LTC1064-3
12
AGND
V–
6
VOUT
OUT C
3
5
5k
NC
fCLK
AGND
75/150
NC
VOUT
INV A
NC
V+
2.2k
T2L
LEVEL
11
10
9
RATIO
5k
1µF
VOUT
8
1064-3 F04
1064-3 F03
Figure 4. Level Shifting the Input T2L Clock
for Single Supply Operation ≥6V
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
1
VIN
V+
0.1µF
2
NC
OUT C
14
13
NC
LTC1064-3
3
12
AGND
V–
4
5
6
7
VIN
V+
AGND
NC
INV A
fCLK
75/150
VOUT
NC
V–
10k
0.1µF
11
VOUT
200pF
10
9
8
V+/GND/V –
4.99k
4.99k
–
50Ω
LT1056
430pF
+
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
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8
LTC1064-3
U
PACKAGE DESCRIPTIO
J Package
14-Lead CERDIP (Narrow 0.300, Hermetic)
(LTC DWG # 05-08-1110)
.005
(0.127)
MIN
.785
(19.939)
MAX
14
13
12
11
10
9
8
.220 – .310
(5.588 – 7.874)
.025
(0.635)
RAD TYP
1
2
3
4
5
6
7
.300 BSC
(7.62 BSC)
.200
(5.080)
MAX
.015 – .060
(0.381 – 1.524)
.008 – .018
(0.203 – 0.457)
0° – 15°
.045 – .065
(1.143 – 1.651)
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
.014 – .026
(0.360 – 0.660)
.100
(2.54)
BSC
.125
(3.175)
MIN
J14 0801
OBSOLETE PACKAGE
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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
1
2
3
4
5
6
7
.255 ± .015*
(6.477 ± 0.381)
.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 –.015
(
+0.889
8.255
–0.381
NOTE:
1. DIMENSIONS ARE
)
.120
(3.048)
MIN
.005
(0.125) .100
MIN (2.54)
BSC
INCHES
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
.018 ± .003
(0.457 ± 0.076)
N14 1002
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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
TYP
.398 – .413
(10.109 – 10.490)
NOTE 4
16
N
15
14
13
12
11 10
9
N
.325 ±.005
.420
MIN
.394 – .419
(10.007 – 10.643)
NOTE 3
1
2
3
N/2
N/2
RECOMMENDED SOLDER PAD LAYOUT
1
.005
(0.127)
RAD MIN
.009 – .013
(0.229 – 0.330)
.291 – .299
(7.391 – 7.595)
NOTE 4
.010 – .029 × 45°
(0.254 – 0.737)
3
4
5
6
7
.093 – .104
(2.362 – 2.642)
8
.037 – .045
(0.940 – 1.143)
0° – 8° TYP
NOTE 3
.016 – .050
(0.406 – 1.270)
NOTE:
1. DIMENSIONS IN
2
.050
(1.270)
BSC
.004 – .012
(0.102 – 0.305)
.014 – .019
(0.356 – 0.482)
TYP
INCHES
(MILLIMETERS)
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)
S16 (WIDE) 0502
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
LTC1064-3
U
TYPICAL APPLICATIO S
1
2
NC
OUT C
14
VOUT1: f–3dB =
13
NC
LTC1064-3
3
12
AGND
V–
VIN1
4
7.5V
0.1µF
5
6
7
VIN2
Amplitude Response
fCLK
55
VIN
V+
AGND
NC
fCLK
75/150
VOUT
INV A
NC
11
–7.5V
fCLK = 1MHz
0.1µF
10
9
fCLK
VOUT2: f–3dB =
110
8
1064-3 F06
Figure 6. Dual 4th Order Bessel Filters. VS = ±7.5V,
f CLK = 1MHz, Pin 10 to GND. f –3dB = 9kHz and 18kHz
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
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Active RC, 4th Order Bessel Lowpass
Continuous Time, Resistor Programmable Cutoff
LTC1569-6
DC Accurate, 10th Order Lowpass
Linear Phase, Internal Precision Clock, S0-8 Package
LTC1569-7
DC Accurate, 10th Order Lowpass
Linear Phase, Internal Precision Clock, S0-8 Package
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12
Linear Technology Corporation
LW/TP 1202 1K REV A • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
 LINEAR TECHNOLOGY CORPORATION 1989