LTC1064-7CN Linear Technology, LTC1064-7CN Datasheet

IC FILTR 8TH ORDR LOWPASS 14-DIP

LTC1064-7CN

Manufacturer Part Number
LTC1064-7CN
Description
IC FILTR 8TH ORDR LOWPASS 14-DIP
Manufacturer
Linear Technology
Datasheet

Specifications of LTC1064-7CN

Filter Type
Linear Phase, Lowpass Switched Capacitor
Frequency - Cutoff Or Center
100kHz
Number Of Filters
1
Max-order
8th
Voltage - Supply
±2.375 V ~ 8 V
Mounting Type
Through Hole
Package / Case
14-DIP (0.300", 7.62mm)
Order Filter (max)
8th
Single Supply Voltage (typ)
5V
Dual Supply Voltage (typ)
±3/±5V
Power Supply Requirement
Single/Dual
Single Supply Voltage (min)
4.75V
Single Supply Voltage (max)
16V
Dual Supply Voltage (min)
±2.375V
Dual Supply Voltage (max)
±8V
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Package Type
PDIP N
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
Steeper Roll-Off Than 8th Order Bessel Filters
f
Phase Equalized Filter in 14-Pin Package
Phase and Group Delay Response Fully Tested
Transient Response Exhibits 5% Overshoot and
No Ringing
Wide Dynamic Range
72dB THD or Better Throughout a 50kHz Passband
No External Components Needed
Available in 14-Pin DIP and 16-Pin SO Wide
Packages
Data Communication Filters
Time Delay Networks
Phase-Matched Filters
CUTOFF
7.5V
V
IN
NOTE: THE POWER SUPPLIES SHOULD BE BYPASSED BY A
0.1µF CAPACITOR CLOSE TO THE PACKAGE AND ANY PRINTED
CIRCUIT BOARD ASSEMBLY SHOULD MAINTAIN A DISTANCE
OF AT LEAST 0.2 INCHES BETWEEN ANY OUTPUT OR INPUT
PIN AND THE f
up to 100kHz
80kHz Linear Phase Lowpass Filter
CLK
1
2
3
4
5
6
7
U
LINE.
LTC1064-7
14
13
12
11
10
9
8
U
1064-7 TA01
–7.5V
CLK = 4MHz
7.5V
V
OUT
DESCRIPTIO
The LTC
lowpass filter with linear passband phase and flat group
delay. The amplitude response approximates a maximally
flat passband while it exhibits steeper roll-off than an
equivalent 8th order Bessel filter. For instance, at twice the
cutoff frequency the filter attains 34dB attenuation (vs
12dB for Bessel), while at three times the cutoff frequency,
the filter attains 68dB attenuation (vs 30dB for Bessel).
The cutoff frequency of the LTC1064-7 is tuned via an
external TTL or CMOS clock.
The LTC1064-7 features wide dynamic range. With single
5V supply, the S/N + THD is 76dB. Optimum 92dB S/N is
obtained with ±7.5V supplies.
The clock-to-cutoff frequency ratio of the LTC1064-7 can
be set to 50:1 (Pin 10 to V
When the filter operates at clock-to-cutoff frequency ratio
of 50:1, the input is double-sampled to lower the risk of
aliasing.
The LTC1064-7 is pin-compatible with the LTC1064-X
series, LTC1164-7 and LTC1264-7.
All other trademarks are the property of their respective owners.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Linear Phase, 8th Order
®
1064-7 is a clock-tunable monolithic 8th order
V
f
RATIO = 50:1
CLK
S
= ±7.5V
= 4MHz
U
Eye Diagram
+
1µs/DIV
Lowpass Filter
) or 100:1 (Pin 10 to V
LTC1064-7
1064-7 TA02
10647fb
).
1

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LTC1064-7CN Summary of contents

Page 1

... Bessel), while at three times the cutoff frequency, the filter attains 68dB attenuation (vs 30dB for Bessel). The cutoff frequency of the LTC1064-7 is tuned via an external TTL or CMOS clock. The LTC1064-7 features wide dynamic range. With single 5V supply, the S/N + THD is 76dB. Optimum 92dB S/N is obtained with ± ...

Page 2

... Operating Temperature Range LTC1064-7C ....................................... – 40°C to 85°C LTC1064-7M OBSOLETE .............. – 55°C to 125°C ≤ Lead Temperature (Soldering, 10 sec)................. 300°C + 0.3V ORDER PART NUMBER GND 3 LTC1064-7CN + V 4 GND (A) 7 INV ( PACKAGE 16-LEAD PLASTIC SO (WIDE) LTC1064-7CJ = 110°C, θ T JMAX LTC1064-7MJ The ● ...

Page 3

... ±5V 50: ±5V 100: ±2.375V 25° ±5V 25° ±7.5V 25° LTC1064-7 = 10kHz or 20kHz 1MHz, TTL or CLK MIN TYP MAX ±1.0 ±1.0 ± 2.0 ● ± 2.0 ● 59.7 ± 0.5 117.0 ± 1.0 ● 58.6 59.7 60.7 ● 115.0 117.0 119.0 ± ...

Page 4

... F is arbitrarily called the “phase factor” expressed in degrees. The phase factor allows the calculation of the phase at a given frequency. Example: The phase shift at 14kHz of the LTC1064-7 shown in Figure 1 is: phase shift = 180° – 430° (14kHz/20kHz) ± nonlinearity = –121° ± – ...

Page 5

... GAIN – 60 –1 –120 –2 PHASE –180 –3 –240 –4 –300 –5 –6 –360 1064-7 G06 LTC1064-7 Phase Factor vs f CLK (Typical Unit) 485 V = ± 100:1 475 CLK C 70°C 465 455 445 25°C 435 0°C 425 415 3.0 3.5 0.5 1 ...

Page 6

... LTC1064 TYPICAL PERFOR A Passband Gain vs Frequency and f CLK ±7. 1MHz S CLK 25° 2MHz A CLK ( 50 3MHz CLK C 3 CLK 4MHz CLK 5MHz CLK 1 0 –1 D – – 3 –4 – 100 1000 FREQUENCY (kHz) 1064-7 G08 Passband Gain vs Frequency and f CLK SINGLE 0.5MHz ...

Page 7

... V S ≤ 2.5MHz f CLK ( 50:1 OR 100:1 CLK 0°C TO 70° 0.2 0.6 0 0.4 0.8 FREQUENCY (f /FREQUENCY) CUTOFF LTC1064-7 THD + Noise vs Frequency – SINGLE 5V S – 0.5V IN RMS f = 500kHz – 50 CLK ( 100:1 CLK C – 55 (PINS 2V) – 60 –65 –70 –75 –80 –85 – ...

Page 8

... LTC1064 TYPICAL PERFOR A Table 1. Passband Gain and Phase = ±7.5V 50: 25°C S CLK C A FREQUENCY (kHz) GAIN (dB 1MHz (Typical Unit) CLK 0.000 – 0.086 5.000 – 0.086 10.000 – 0.334 15.000 – 1.051 20.000 – 3.316 f = 2MHz (Typical Unit) CLK 0.000 – 0.131 10.000 – ...

Page 9

... Unit) CLK 180.00 0.000 70.81 5.000 – 38.39 10.000 – 146.85 15.000 – 256.10 20.000 LTC1064 50: 25°C CLK C A GAIN (dB) PHASE (DEG) – 0.134 180.00 – 0.134 73.52 – 0.391 – 33.67 – 1.109 – ...

Page 10

... Figure 2. Dual Supply Operation for LTC1064 0.1µ 10k 10k 1µF Figure 3. Single Supply Operation for an f Clock Input Pin (11) Any TTL or CMOS clock source with a square-wave output and 50% duty cycle (±10 adequate clock source for the device. The power supply for the clock source should not be the filter’ ...

Page 11

... RMS 300µV cannot be reduced with post filtering. For instance, the RMS 650µV LTC1064-7 wideband noise at ±5V supply is 105µV RMS 95µV of which have frequency contents from RMS the filter’s cutoff frequency. The total wideband noise (µ nearly independent of the value of the clock ...

Page 12

... CLK If, for instance, an LTC1064-7 operating with a 100kHz 3.0 clock and 1kHz cutoff frequency receives a 98kHz, 10mV 2.5 2.0 input signal, a 2kHz, 143µV 1 ...

Page 13

... RAD TYP 0° – 15° .045 – .065 (1.143 – 1.651) .014 – .026 (0.360 – 0.660) OBSOLETE PACKAGE LTC1064 .220 – .310 (5.588 – 7.874 .200 (5.080) MAX .015 – .060 (0.381 – 1.524) .100 .125 (2.54) (3.175) ...

Page 14

... LTC1064-7 PACKAGE DESCRIPTIO .300 – .325 (7.620 – 8.255) .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 15

... NOTE 3 N/2 1 .093 – .104 × 45° (2.362 – 2.642) 0° – 8° TYP .050 (1.270) BSC .014 – .019 (0.356 – 0.482) LTC1064-7 .398 – .413 (10.109 – 10.490) NOTE .394 – .419 (10.007 – 10.643) N/2 ...

Page 16

... OF AT LEAST 0.2 INCHES BETWEEN ANY OUTPUT OR INPUT PIN AND THE f LINE. CLK RELATED PARTS PART NUMBER DESCRIPTION LTC1064 Universal Filter Building Block LTC1064-1/2/3/4 8th Order Low Pass Filters, F LTC1164 Universal Filter Building Block LTC1164-5/6/7 8th Order Low Pass Filters, F LTC1264 Universal Filter Building Block LTC1264-7 8th Order Low Pass Filter, F LT6600-2 ...

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