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LTC1064-1CN#PBF

P1-P3P4-P6P7-P8
LTC1064-1
1
10641fa
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
■
8th Order Filter in a 14-Pin Package
■
No External Components
■
100:1 Clock to Center Ratio
■
150µV
RMS
Total Wideband Noise
■
0.03% THD or Better
■
50kHz Maximum Corner Frequency
■
Operates from ±2.37V to ±8V Power Supplies
■
Passband Ripple Guaranteed Over Full Military
Temperature Range
Low Noise, 8th Order, Clock
Sweepable Elliptic Lowpass Filter
The LTC
®
1064-1 is an 8th order, clock sweepable elliptic
(Cauer) lowpass switched capacitor filter. The passband
ripple is typically ±0.15dB, and the stopband attenuation
at 1.5 times the cutoff frequency is 68dB or more.
An external TTL or CMOS clock programs the value of the
filter’s cutoff frequency. The clock to cutoff frequency ratio
is 100:1.
No external components are needed for cutoff frequencies
up to 20kHz. For cutoff frequencies over 20kHz two low
value capacitors are required to maintain passband flatness.
The LTC1064-1 features low wideband noise and low
harmonic distortion even for input voltages up to 3V
RMS
.
In fact the LTC1064-1 overall performance completes with
equivalent multiple op amp RC active realizations.
The LTC1064-1 is available in a 14-pin DIP or 16-pin
surface mounted SW package.
The LTC1064-1 is pin compatible with the LTC1064-2.
, LTC and LT are registered trademarks of Linear Technology Corporation.
8th Order Clock Sweepable Lowpass
Elliptic Antialiasing Filter Frequency Response
V
OUT
/V
IN
(dB)
15
0
–15
–30
–45
–60
–75
–90
–105
FREQUENCY (kHz)
040
1064 TA02
105152535
20
30
8th ORDER CLOCK SWEEPABLE LOWPASS ELLIPTIC ANTIALIASING
FILTER MAINTAINS, FOR 0.1Hz ≤ f
CUTOFF
≤ 10kHz, A ±0.15dB PASSBAND
RIPPLE AND 72dB STOPBAND ATTENUATION AT 1.5 × f
CUTOFF
.
TOTAL WIDEBAND NOISE = 150µV
RMS
, THD = 0.03% FOR V
IN
= 1V
RMS
LTC1064-1
1
2
3
4
5
6
7
14
13
12
11
10
9
8
R(h, I)
COMP2*
V
–
f
CLK
NC
V
OUT
NC
INV C
V
IN
AGND
V
+
AGND
COMP1*
INV A
1064 TA01
NOTE: THE POWER SUPPLIES SHOULD BE BYPASSED BY A 0.1µF
CAPACITOR CLOSE TO THE PACKAGE.
FOR SERVO OFFSET NULLING APPLICATIONS, PIN 1 IS THE 2ND
STAGE SUMMING JUNCTION.
*FOR CUTOFF FREQUENCY ABOVE 20kHz, USE COMPENSATION
CAPACITORS (5pF TO 56pF) BETWEEN PIN 13 AND PIN 1
AND PIN 6 AND PIN 7.
CLOCK
(TTL, ≤5MHz)
–8V
8V
V
OUT
V
IN
0.1µF
0.1µF
■
Antialiasing Filters
■
Telecom PCM Filters
LTC1064-1
2
10641fa
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
ORDER PART
NUMBER
LTC1064-1CN
LTC1064-1ACN
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
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
INV C
V
IN
AGND
V
+
AGND
COMP1
INV A
R(h, l)
COMP2
V
–
f
CLK
NC
V
OUT
NC
Operating Temperature Range
LTC1064-1M (OBSOLETE) ............... –55°C to 125°C
LTC1064-1C/AC.................................. –40°C to 85°C
ORDER PART
NUMBER
LTC1064-1CSW
T
JMAX
= 150°C, θ
JA
= 90°C/W
T
JMAX
= 110°C, θ
JA
= 70°C/W
LTC1064-1MJ
LTC1064-1CJ
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, f
CLK
= 1MHz, R1 = 10k, C1 = 10pF, TTL or CMOS clock input
level unless otherwise specified.
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
INV C
V
IN
AGND
V
+
AGND
NC
COMP1
INV A
R(h, l)
COMP2
V
–
NC
f
CLK
NC
NC
V
OUT
PARAMETER CONDITIONS MIN TYP MAX UNITS
Passband Gain, LTC1064-1, 1A Referenced to 0dB, 1Hz to 0.1f
C
● ±0.1 ±0.35 dB
Gain TempCo 0.0002 dB/°C
Passband Edge Frequency, f
C
10 ± 1% kHz
Gain at f
C
Referenced to Passband Gain
LTC1064-1
● –1.25 0.85 dB
LTC1064-1A
● –0.75 0.65 dB
–3dB Frequency 10.7 kHz
Passband Ripple (Note 1) 0.1f
C
to 0.85f
C
Referenced to Passband Gain,
LTC1064-1 Measured at 6.25kHz and 8.5kHz
● ±0.15 ±0.32 dB
LTC1064-1A
● ±0.1 ±0.19 dB
Ripple TempCo 0.0004 dB/°C
Stopband Attenuation At 1.5f
C
Referenced to 0dB
LTC1064-1
● 66 72 dB
LTC1064-1A
● 68 72 dB
Stopband Attenuation At 2f
C
Referenced to 0dB
LTC1064-1
● 67 72 dB
LTC1064-1A
● 68 72 dB
LTC1064-1
3
10641fa
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, f
CLK
= 1MHz, R1 = 10k, C1 = 10pF, TTL or CMOS clock input
level unless otherwise specified.
Note 2: For tighter specifications please contact LTC Marketing.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Frequency Range 0f
CLK
/2 kHz
Output Voltage Swing and V
S
= ±2.37V ● ±1V
Operating Input Voltage Range V
S
= ±5V ● ±3V
V
S
= ±7.5V ● ±5V
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 to 999kHz 150 µV
RMS
V
S
= ±7.5V, Input = GND 1Hz to 999kHz 165 µV
RMS
Output DC Offset V
S
= ±7.5V, Pin 2 Grounded
LTC1064-1 50 175 mV
LTC1064-1A 50 125 mV
Output DC Offset TempCo V
S
= ±5V –100 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
= ±7.5V 5 MHz
Power Supply Current V
S
= ±2.37V ● 10 22 mA
V
S
= ±5V 12 23 mA
● 26 mA
V
S
= ±7.5V, f
CLK
= 1MHz 16 28 mA
● 32 mA
Power Supply Voltage Range ● ±2.37 ±8V
FREQUENCY (kHz)
1
GAIN (dB)
15
0
–15
–30
–45
–60
–75
–90
–105
10 100
1064 G01
V
S
= ±5V
T
A
= 25°C
f
CLK
= 1MHz
f
C
= 10kHz ± 0.1dB
f
–3dB
= 10.7kHz
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Gain vs Frequency Phase vs Frequency Group Delay
FREQUENCY (kHz)
01 3 56
PHASE (DEG)
0
–45
–90
–135
–180
–225
–270
–315
–360
–405
–450
109
1064 G02
24 8711
V
S
= ±5V
T
A
= 25°C
f
CLK
= 1MHz
f
C
= 10kHz
FREQUENCY (kHz)
500
450
400
350
300
250
200
150
100
50
0
GROUP DELAY (µs)
1064 G03
0123
4
5
6789 1210 11
V
S
= ±5V
T
A
= 25°C
f
CLK
= 1MHz
f
C
= 10kHz
P1-P3P4-P6P7-P8

LTC1064-1CN#PBF

Mfr. #:
Buy LTC1064-1CN#PBF
Manufacturer:
Analog Devices Inc.
Description:
Active Filter 50kHz Clk Sweepable Cauer Filter
Lifecycle:
New from this manufacturer.
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