ltc1064-1cn-pbf Linear Technology Corporation, ltc1064-1cn-pbf Datasheet

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ltc1064-1cn-pbf

Manufacturer Part Number
ltc1064-1cn-pbf
Description
Low Noise, 8th Order, Clock Sweepable Elliptic Lowpass Filter
Manufacturer
Linear Technology Corporation
Datasheet
FEATURES
APPLICATIO S
TYPICAL APPLICATIO
8th Order Filter in a 14-Pin Package
No External Components
100:1 Clock to Center Ratio
150µV
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
Antialiasing Filters
Telecom PCM Filters
0.1µF
V
8V
IN
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
RMS
CAPACITORS (5pF TO 56pF) BETWEEN PIN 13 AND PIN 1
AND PIN 6 AND PIN 7.
8th Order Clock Sweepable Lowpass
Total Wideband Noise
Elliptic Antialiasing Filter
1
2
3
4
5
6
7
U
INV C
V
AGND
V
AGND
COMP1*
INV A
IN
+
LTC1064-1
COMP2*
R(h, I)
V
f
OUT
CLK
NC
NC
V
14
13
12
11
10
9
8
U
CLOCK
(TTL, ≤5MHz)
V
OUT
1064 TA01
0.1µF
Sweepable Elliptic Lowpass Filter
–8V
Low Noise, 8th Order, Clock
DESCRIPTIO
The LTC
(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
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 MAINTAINS, FOR 0.1Hz ≤ f
RIPPLE AND 72dB STOPBAND ATTENUATION AT 1.5 × f
TOTAL WIDEBAND NOISE = 150µV
®
1064-1 is an 8th order, clock sweepable elliptic
–105
–15
–30
–45
–60
–75
–90
15
0
0
5
U
Frequency Response
10
FREQUENCY (kHz)
15
CUTOFF
RMS
20
, THD = 0.03% FOR V
≤ 10kHz, A ±0.15dB PASSBAND
25
LTC1064-1
30
35
1064 TA02
CUTOFF
40
IN
.
= 1V
RMS
10641fa
RMS
1
.

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ltc1064-1cn-pbf Summary of contents

Page 1

... 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. ...

Page 2

... Measured at 6.25kHz and 8.5kHz LTC1064-1A Ripple TempCo Stopband Attenuation At 1.5f LTC1064-1 LTC1064-1A Stopband Attenuation At 2f LTC1064-1 LTC1064- (Note 1) Operating Temperature Range LTC1064-1M (OBSOLETE) ............... – 55°C to 125°C LTC1064-1C/AC .................................. – 40°C to 85° ORDER PART NUMBER INV C 1 LTC1064-1CN LTC1064-1ACN 3 AGND ...

Page 3

... T = 25° CLK – 10kHz C –135 –180 –225 –270 –315 –360 –405 –450 FREQUENCY (kHz) LTC1064-1 MIN TYP MAX 0 f ±1 ±3 ±5 0.015 0.03 150 165 50 50 –100 3/1 200 ±2.37 Group Delay 500 V = ± ...

Page 4

... LTC1064 TYPICAL PERFOR A CE CHARACTERISTICS Gain vs Frequency 15 0 – 2MHz 20kHz CLK C COMP1 NOT USED, –30 COMP2 = 20pF f = 3MHz 30kHz CLK C –45 COMP1 = 24pF COMP2 = 36pF – 4MHz 40kHz CLK C COMP1 = 36pF –75 COMP2 = 47pF – ± 25°C A –105 ...

Page 5

... V 2. 0.1µF LEVEL 5k 1µF V OUT RECOMMENDED OP AMPS: LT1022, LT318, LT1056 1064 F03 2 L Clock Figure 4. Buffering the Filter Output. The Buffer Op Amp Should Not Share the LTC1064-1 Power Lines. LTC1064 INV C R( COMP2 – ...

Page 6

... V OUT2 5 (µF) f –3dB RMS RMS 1V/DIV Over a 10:1 Clock Range, for f = 2kHz to 20kHz CLK 1 14 INV C R( COMP2* IN – – AGND V LTC1064-1 0.1µ CLK 5 10 AGND NC 4.99k 4.99k 6 9 – V COMP1* OUT INV A 430pF + Amplitude Response 5kHz – ...

Page 7

... TYP .050 (1.270) BSC NOTE 3 .014 – .019 (0.356 – 0.482) .016 – .050 (0.406 – 1.270) LTC1064-1 .785 (19.939) .005 MAX (0.127) MIN .025 (5.588 – ...

Page 8

... Linear Technology Corporation 8 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 Transitional Elliptic-Bessel 10th Order Lowpass Filter 1 14 INV C R( COMP2 – – AGND V LTC1064 0.1µ 250 + CLK V f CLK × f –3dB 5 10 AGND COMP1* V ...

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