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LTC1064-2CN#PBF

P1-P3P4-P6P7-P9P10-P12
LTC1064-2
1
10642fa
FEATURES
APPLICATIO S
U
DESCRIPTIO
U
TYPICAL APPLICATIO
U
■
Antialiasing Filters
■
Smoothing Filters
■
Tracking High Frequency Lowpass Filters
■
8th Order Filter in a 14-Pin Package
■
140kHz Maximum Corner Frequency
■
No External Components
■
50:1 and 100:1 Clock to Cutoff Frequency Ratio
■
80µV
RMS
Total Wideband Noise
■
0.03% THD or Better
■
Operates from ±2.37V to ±8V Power Supplies
Low Noise, High Frequency,
8th Order Butterworth Lowpass Filter
The LTC
®
1064-2 is a monolithic 8th order lowpass
Butterworth filter, which provides a maximally flat pass-
band. The attenuation slope is –48dB/octave and the
maximum attenuation is in excess of 80db. An external
TTL or CMOS clock programs the filter’s cutoff frequency.
The clock to cutoff frequency ratio is 100:1 (Pin 10 at
V
–
) or 50:1 (Pin 10 at V
+
). The maximum cutoff frequency
is 140kHz. No external components are needed.
The LTC1064-2 features low wideband noise and low
harmonic distortion even for input voltages up to 3V
RMS
.
In fact the LTC1064-2 overall performance competes with
equivalent multiple op amp RC active realizations. The
LTC1064-2 is available in a 14-pin DIP or 16-pin surface
mounted SW package. The LTC1064-2 is fabricated using
LTC’s enhanced analog CMOS Si-gate process.
The LTC1064-2 is pin compatible with the LTC1064-1.
8th Order Clock Sweepable
Lowpass Butterworth Filter Measured Frequency Response
FREQUENCY (kHz)
0
0
–15
–30
–45
–60
–75
–90
–105
300 500
1064-2 TA01b
100 200
400 600 700
V
OUT
/V
IN
(dB)
V
S
= ±7.5V
LTC1064-2
1
2
3
4
5
6
7
14
13
12
11
10
9
8
OUT C
NC
V
–
f
CLK
50/100
V
OUT
NC
NC
V
IN
AGND
V
+
AGND
NC
R
IN
A
1064 TA01a
NOTE: THE POWER SUPPLIES SHOULD BE BYPASSED BY A 0.1µF
CAPACITOR CLOSE TO THE PACKAGE. THE NC PINS 1, 6, 8,
AND 13 SHOULD BE PREFERABLY GROUNDED.
8V
–8V
CLOCK = 5MHz
, LTC and LT are registered trademarks of Linear Technology Corporation.
LTC1064-2
2
10642fa
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
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
Operating Temperature Range
LTC1064-2M (OBSOLETE) ............... –55°C to 125°C
LTC1064-2C ....................................... – 40°C to 85°C
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, 100:1, f
CLK
= 2MHz, R1 = 10k, TTL clock input level unless
otherwise specified.
ORDER PART
NUMBER
LTC1064-2CN
ORDER PART
NUMBER
LTC1064-2CSW
T
JMAX
= 150°C, θ
JA
= 130°C/W
T
JMAX
= 150°C, θ
JA
= 110°C/W
LTC1064-2MJ
LTC1064-2CJ
OBSOLETE PACKAGE
Consider the N14 Package for Alternate Source
1
2
3
4
5
6
7
8
TOP VIEW
SW PACKAGE
16-LEAD PLASTIC (WIDE) SO
16
15
14
13
12
11
10
9
NC
V
IN
AGND
V
+
AGND
NC
NC
R
IN
A
OUT C
NC
V
–
NC
f
CLK
50/100
NC
V
OUT
1
2
3
4
5
6
7
TOP VIEW
J PACKAGE
14-LEAD CERDIP
N PACKAGE
14-LEAD PDIP
14
13
12
11
10
9
8
NC
V
IN
AGND
V
+
AGND
NC
R
IN
A
OUT C
NC
V
–
f
CLK
50/100
V
OUT
NC
PARAMETER CONDITIONS MIN TYP MAX UNITS
Passband Gain (Note 2) Referenced to 0dB, 1Hz to 1kHz ● –0.5 0.15 dB
Gain TempCo 0.0002 dB/°C
–3dB Frequency 100:1 20 kHz
50:1 40 kHz
Gain at –3dB Frequency Referenced to 0dB, f
IN
= 20kHz ● –3 –2.75 dB
Stopband Attenuation At 1.5f
–3dB
, 50:1, f
IN
= 60kHz ● –24 –27 dB
Stopband Attenuation At 2f
–3dB
, 100:1, f
IN
= 40kHz ● –44 –47 dB
Stopband Attenuation At 3f
–3dB
, 100:1, f
IN
= 60kHz –74 dB
Stopband Attenuation At 4f
–3dB
, 100:1, f
IN
= 80kHz –90 dB
Input Frequency Range 100:1 0 <f
CLK
/2 kHz
50:1 0 <f
CLK
kHz
Output Voltage Swing and V
S
= ±2.37V ● ±1.1 V
Operating Input Voltage Range V
S
= ±5V ● ±3.1 V
V
S
= ±7.5V ● ±5.0 V
Total Harmonic Distortion V
S
= ±5V, Input = 1V
RMS
at 1kHz 0.015 %
V
S
= ±7.5V, Input = 3V
RMS
at 1kHz 0.03 %
Wideband Noise V
S
= ±5V, Input = GND 1Hz – 1.99MHz 80 µV
RMS
V
S
= ±7.5V, Input = GND 1Hz – 1.99MHz 90 µV
RMS
LTC1064-2
3
10642fa
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, 100:1, f
CLK
= 2MHz, R1 = 10k, TTL clock input level unless
otherwise specified.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Output DC Offset (Note 2) V
S
= ±7.5V ±30 ±125 mV
Output DC Offset TempCo V
S
= ±5V ±90 µV/°C
Input Impedance 10 20 kΩ
Output Impedance f
OUT
= 10kHz 2 Ω
Output Short-Circuit Current Source/Sink 3/1 mA
Clock Feedthrough 200 µV
RMS
Maximum Clock Frequency 50% Duty Cycle, V
S
= ±5V 5 MHz
50% Duty Cycle, T
A
= 25°C, V
S
= ±7.5V 7 MHz
Power Supply Current V
S
= ±2.37V, f
CLK
= 1MHz ● 11 22 mA
V
S
= ±5V, f
CLK
= 1MHz 14 23 mA
● 26 mA
V
S
= ±7.5V, f
CLK
= 1MHz 17 28 mA
● 32 mA
Power Supply Voltage Range ● ±2.37 ±8V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: For tighter specifications please contact LTC Marketing.
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Amplitude Response Phase Response Group Delay vs Frequency
f
IN
(Hz)
10k
V
OUT
/V
IN
(dB)
15
0
–15
–30
–45
–60
–75
–90
–105
100k 1M
1064 G01
V
S
= ±7.5V; 50:1
T
A
= 25°C
f
CLK
= 2MHz
f–3dB = 40kHz
f
CLK
= 7MHz
f–3dB = 140kHz
f
CLK
= 5MHz
f–3dB = 100kHz
f
IN
(kHz)
01 3 56
PHASE (DEG)
45
0
–45
–90
–135
–180
–225
–270
–315
–360
–405
–450
109
1064 G02
24 8711
V
S
= ±7.5V
T
A
= 25°C
f
CLK
= 1MHz
100:1
f
–3dB
= 10kHz
f
IN
(kHz)
220
200
180
160
140
120
100
80
60
40
20
0
GROUP DELAY (µs)
1064 G03
01234 567 8 91011
V
S
= ±7.5V
T
A
= 25°C
f
CLK
= 1MHz
100:1
f
–3dB
= 10kHz
P1-P3P4-P6P7-P9P10-P12

LTC1064-2CN#PBF

Mfr. #:
Buy LTC1064-2CN#PBF
Manufacturer:
Analog Devices Inc.
Description:
Active Filter 50kHz Clk Sw Butterworth Filter
Lifecycle:
New from this manufacturer.
Delivery:
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