ltc1064-1csw-trpbf Linear Technology Corporation, ltc1064-1csw-trpbf Datasheet

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ltc1064-1csw-trpbf

Manufacturer Part Number
ltc1064-1csw-trpbf
Description
Low Noise, Fast, Quad Universal Filter Building Block
Manufacturer
Linear Technology Corporation
Datasheet
APPLICATIO S
FEATURES
TYPICAL APPLICATIO
Clock-Tunable 8th Order Cauer Lowpass Filter with f
Four Filters in a 0.3 Inch Wide Package
Maximum Center Frequency: 140kHz
Customized Version with Internal Resistors
Available
One Half the Noise of the LTC1059/LTC1060/
LTC1061 Devices
Maximum Clock Frequency: 7MHz
Clock-to-Center Frequency Ratio of 50:1 and 100:1
Simultaneously Available
Power Supplies: ±2.375V to ±8V
Low Offsets
Low Harmonic Distortion
Available in 24-Pin DIP and SO Wide Packages
Anti-Aliasing Filters
Wide Frequency Range Tracking Filters
Spectral Analysis
Loop Filters
R
FOR f
H2
(FROM
, R
CLK
V
L2
8V
IN
)
= 5MHz, ADD C1 = 10pF BETWEEN PINS 4, 1
22.1k
18.25k
10.7k
49.9K
11.5K
C2 = 10pF BETWEEN PINS 21, 24
C3 = 27pF BETWEEN PINS 9, 12
0.1µF
10k
10k
U
10
11
12
1
2
3
4
5
6
7
8
9
INV B
HPB/NB
BPB
LPB
SB
AGND
V
SA
LPA
BPA
HPA/NA
INV A
+
LTC1064
U
HPC/NC
50/100
INV D
INV C
BPD
HPD
BPC
LPD
LPC
CLK
SC
V
WIDEBAND NOISE ≅ 140µV
24
23
22
21
20
19
18
17
16
15
14
13
5MHz
8V
CUTOFF
12.1k
17.4k
66.5k
41.2k
12.7k
121k
10k
10k
13k
14k
up to 100kHz
26.7k
102k
R
R
0.1µF
H2
L2
Universal Filter Building Block
RMS
DESCRIPTIO
The LTC
switched-capacitor filter building blocks. Each filter build-
ing block, together with an external clock and three to five
resistors can provide various 2nd order functions like
lowpass, highpass, bandpass and notch. The center fre-
quency of each 2nd order function can be tuned with an
external clock, or a clock and resistor ratio. For Q ≤ 5, the
center frequency range is from 0.1Hz to 100kHz. For Q ≤
3, the center frequency range can be extended to 140kHz.
Up to 8th order filters can be realized by cascading all four
2nd order sections. Any classical filter realization (such as
Butterworth, Cauer, Bessel and Chebyshev) can be formed.
A customized monolithic version of the LTC1064 includ-
ing internal thin film resistors can be obtained for high
volume applications. Consult LTC Marketing for details.
LTCMOS is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
1064 TA01
PIN 12
–8V
V
, LTC and LT are registered trademarks of Linear Technology Corporation.
OUT
®
Low Noise, Fast, Quad
1064 consists of four high speed, low noise
–105
–120
–135
–15
–30
–45
–60
–75
–90
U
0
1k
RIPPLE = ±0.1dB
RIPPLE = ±0.05dB
Gain vs Frequency
f
CLK
INPUT FREQUENCY (Hz)
f
CLK
= 5MHz
10k
= 1MHz
100k
LTC1064
1064 TA02
1M
1064fb
1

Related parts for ltc1064-1csw-trpbf

ltc1064-1csw-trpbf Summary of contents

Page 1

... Up to 8th order filters can be realized by cascading all four 2nd order sections. Any classical filter realization (such as Butterworth, Cauer, Bessel and Chebyshev) can be formed. A customized monolithic version of the LTC1064 includ- ing internal thin film resistors can be obtained for high volume applications. Consult LTC Marketing for details. ...

Page 2

... ABSOLUTE AXI U RATI GS + – Total Supply Voltage ( ............................. 16V Power Dissipation ............................................. 500mW Operating Temperature Range LTC1064AC/LTC1064C .................... – 40°C to 85°C LTC1064AM LTC1064M (OBSOLETE) ............... – 55°C to 125°C U PACKAGE/ORDER I FOR ATIO TOP VIEW INV B 1 INV C 24 HPB/ HPC/NC BPB ...

Page 3

... LTC1064 LTC1064A (Note 2) Clock-to-Center Frequency LTC1064 Ratio, Side-to-Side Matching LTC1064A (Note 2) Clock-to-Center Frequency LTC1064 Ratio (Note 3) LTC1064A (Note 2) CLK O LTC1064 LTC1064 A (Note 2) Q Accuracy f Temperature Coefficient O Q Temperature Coefficient DC Offset Voltage V (Table 1) OS1 V (Table 1) OS2 V (Table 1) OS3 ...

Page 4

... LTC1064 W BLOCK DIAGRA INV A – (12) AGND + (6) INV B – (1) + INV C – (24) + INV D – (13 TYPICAL PERFORMANCE CHARACTERISTICS Mode 50:1 CLK 25° ± ±2. ±7. – 25° ±7. ±5V 1 1.0 = ±2.5V ...

Page 5

... CENTER FREQUENCY (kHz) Harmonic Distortion, 8th Order LP Butterworth, f THD = 0.015% for 3V –55°C 25°C 125° – – 1064 G10 LTC1064 Mode 50:1 CLK O – ± ±2. ± ...

Page 6

... AGND (Pin 6): Analog Ground. When the LTC1064 oper- ates with dual supplies, Pin 6 should be tied to system ground. When the LTC1064 operates with a single positive supply, the analog ground pin should be tied to 1/2 supply and it should be bypassed with a 1µF solid tantalum in parallel with a 0.1µF ceramic capacitor, Figure 1. The ...

Page 7

... U U APPLICATIONS INFORMATION ANALOG CONSIDERATIONS Grounding and Bypassing The LTC1064 should be used with separated analog and digital ground planes and single point grounding techniques. Pin 6 (AGND) should be tied directly to the analog ground plane. + Pin should be bypassed to the ground plane with a 0.1µ ...

Page 8

... Mode 1 is faster than Mode 3. Note that Mode 1 can only be implemented with three of the four LTC1064 sections because Section D has no externally available summing node. Section D, however, can be internally connected in Mode 1 upon special request ...

Page 9

... Mode 3 is the second of the primary modes. In Mode 3, the ratio of the external clock frequency to the center fre- quency of each 2nd order section can be adjusted above or below 50:1 or 100:1. Side D of the LTC1064 can only be connected in Mode 3. Figure 6 illustrates Mode 3, the classical state variable configuration, providing highpass, bandpass and lowpass 2nd order filter functions ...

Page 10

... Mode 3a is more versatile than Mode 2 because the notch frequency can be higher or lower than the center fre- quency of the 2nd order section. The external op amp of Figure 9 is not always required. When cascading the sections of the LTC1064, the highpass and lowpass ...

Page 11

... CLK f CLK 17 R44 16 LPD R34 15 BPD R24 14 HPD R14 13 V IN4 17.4k 20k 20k – LT1056 + R43 = 17.8k R44 = 40.2k LTC1064 Amplitude Response CLK –15 –30 – 2MHz CLK –60 –75 –90 = ± –105 10k 100k INPUT FREQUENCY (Hz) Amplitude Response 2MHz ...

Page 12

... CERAMIC CAPACITOR, RIGHT AT THE PINS. NOTE 2: THE RATIOS OF ALL (R2/R4) RESISTORS SHOULD BE MATCHED TO BETTER THAN 0.25%. THE REMAINING RESISTORS SHOULD BE BETTER THAN 0.5% ACCURATE. C-Message Filter 1 INV B R22 2 HPB/NB R32 3 BPB R42 4 LPB AGND LTC1064 0.1µF R12 8 SA R41 9 LPA R31 10 BPA R21 11 HPA/NA R11 12 ...

Page 13

... CLK 50/100 R44 16 LPD R34 15 BPD R24 14 HPD 13 INV D V OUT R41 = 99.73k 1064 TA11 R42 = 25.52k LTC1064 Amplitude Response 15 0 – 15 –30 –45 –60 –75 = ± 5MHz –90 CLK PASSBAND RIPPLE = 0.1dB –105 10k 100k 1M INPUT FREQUENCY (Hz) ...

Page 14

... A ±0.1dB MAX CUTOFF PASSBAND ERROR AND 72dB MIN STOPBAND ATTENUATION AT 1.5 × f CUTOFF TOTAL WIDEBAND NOISE = 150µV , RMS THD = 70dB (0.03%) FOR RMS 100:1. THIS FILTER AVAILABLE CLK CUTOFF AS LTC1064-1 WITH INTERNAL THIN FILM RESISTORS 1064 TA14 1064fb ...

Page 15

... OUT 16 LPD R44 15 BPD R34 14 HPD R24 13 INV D R14 R41 = 40.2k R42 = 39.2k R43 = 20k R44 = 20k 1064 TA17 LTC1064 Amplitude Response 15 0 – 15 –30 –45 –60 –75 = ±8V V – 7MHz CLK –105 10k 100k 1M INPUT FREQUENCY (Hz) 1064 TA16 Amplitude Response ...

Page 16

... R12 = 10.5k R13a = 3k R13b = 29.4k R14 = 10.5k 16 R14 24 INV C R24 23 HPC/NC R34 22 BPC 4pF R44 21 LPC V 20 OUT2 100kHz C 19 – V –8V LTC1064 18 5MHz 0.1µF CLK 50/100 OUT1 f = 50kHz R42 C 16 LPD R32 15 39pF BPD R22 14 HPD 13 INV D R12 R21 = 11.8k R31 = 29.4k ...

Page 17

... RAD TYP .005 (0.127) MIN .015 – .060 (0.381 – 1.524) .045 – .065 .125 (1.143 – 1.651) (3.175) MIN .014 – .026 (0.360 – 0.660) OBSOLETE PACKAGE LTC1064 1.290 (32.77) MAX .200 (5 ...

Page 18

... LTC1064 PACKAGE DESCRIPTIO .300 – .325 (7.620 – 8.255) .020 (0.508) MIN .008 – .015 (0.203 – 0.381) +.035 .325 –.015 ( ) +0.889 8.255 –0.381 NOTE: INCHES 1. DIMENSIONS ARE MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm) ...

Page 19

... NOTE 3 N .093 – .104 (2.362 – 2.642) 0° – 8° TYP .050 (1.270) BSC .014 – .019 (0.356 – 0.482) TYP LTC1064 .598 – .614 (15.190 – 15.600) NOTE .394 – .419 (10.007 – 10.643) ...

Page 20

... 10k (0.1%) H4 1064 TA21 COMMENT Three Filter Building Blocks in a 20-Pin Package 25:1, 50:1, 100:1 and 200:1 CLK O Low Noise, Low Power Pin-for-Pin LTC1064 Compatible Up to 250kHz Center Frequency www.linear.com ● Amplitude Response –10 –20 –30 –40 –50 –60 –70 – ...

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