LTC1062CSW Linear Technology, LTC1062CSW Datasheet

IC FILTR 5TH ORDR LOWPASS 16SOIC

LTC1062CSW

Manufacturer Part Number
LTC1062CSW
Description
IC FILTR 5TH ORDR LOWPASS 16SOIC
Manufacturer
Linear Technology
Datasheet

Specifications of LTC1062CSW

Filter Type
Butterworth, Lowpass Switched Capacitor
Frequency - Cutoff Or Center
20kHz
Number Of Filters
1
Max-order
5th
Voltage - Supply
5 V ~ 16 V, ±2.5 V ~ 8 V
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.300", 7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
LTC1062CS

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1062CSW
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LTC1062CSW#TRPBF
Manufacturer:
LT/凌特
Quantity:
20 000
FEATURES
APPLICATIO S
TYPICAL APPLICATIO
Lowpass Filter with No DC Error
Low Passband Noise
Operates DC to 20kHz
Operates On a Single 5V Supply or Up to ±8V
5th Order Filter
Maximally Flat Response
Internal or External Clock
Cascadable for Faster Rolloff
Buffer Available
60Hz Lowpass Filters
Antialiasing Filter
Low Level Filtering
Rolling Off AC Signals from High DC Voltages
Digital Voltmeters
Scales
Strain Gauges
V
= –5V
V
IN
10Hz 5th Order Butterworth Lowpass Filter
25.8k
NOTE: TO ADJUST OSCILLATOR FREQUENCY,
USE A 6800pF CAPACITOR IN SERIES
WITH A 50k POT FROM PIN 5 TO GROUND
U
1
2
3
4
1µF
FB
AGND
V
DIVIDER
RATIO
LTC1062
B
C
OUT
OUT
OSC
V
+
U
8
7
6
5
C
3900pF
OSC=
1062 TA01
DC ACCURATE
OUTPUT
BUFFERED
OUTPUT
V
+
= 5V
DESCRIPTIO
LTCMOS is a trademark of Linear Technology Corporation.
The LTC
lowpass filter with no DC error. Its unusual architecture
puts the filter outside the DC path so DC offset and low
frequency noise problems are eliminated. This makes the
LTC1062 very useful for lowpass filters where DC accuracy
is important.
The filter input and output are simultaneously taken across
an external resistor. The LTC1062 is coupled to the signal
through an external capacitor. This RC reacts with the
internal switched capacitor network to form a 5th order
rolloff at the output.
The filter cutoff frequency is set by an internal clock that
can be externally driven. The clock-to-cutoff frequency
ratio is typically 100:1, allowing the clock ripple to be
easily removed.
Two LTC1062s can be cascaded to form a 10th order quasi
max flat lowpass filter. The device can be operated with
single or dual supplies ranging from ±2.5V to ±9V.
The LTC1062 is manufactured using Linear Technology’s
enhanced LTCMOS
, LTC and LT are registered trademarks of Linear Technology Corporation.
5th Order Lowpass Filter
®
–100
1062 is a 5th order all pole maximally flat
–10
–20
–30
–40
–50
–60
–80
–90
–70
0
Filter Amplitude Response and Noise
1
C
OSC
= 3900pF
TM
U
INPUT FREQUENCY (Hz)
silicon gate process.
10
1062 TA02
LTC1062
100
20
10
0
50
40
30
1062fd
1

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LTC1062CSW Summary of contents

Page 1

... The device can be operated with single or dual supplies ranging from ±2.5V to ±9V. The LTC1062 is manufactured using Linear Technology’s enhanced LTCMOS , LTC and LT are registered trademarks of Linear Technology Corporation. LTCMOS is a trademark of Linear Technology Corporation. DC ACCURATE OUTPUT – ...

Page 2

... Pin 4 (Pin 6 in SW16 CLK C = 0.01µ 25.78k + f = 100kHz, Pin 4 (Pin 6 in SW16 CLK C = 0.01µ 25.78k + f = 400kHz, Pin 0.01µ 6.5k CLK + f = 400kHz, Pin 0.01µ 6.5k CLK ORDER PART NUMBER LTC1062CSW 14 B OUT 13 OUT + OSC 90°C/W JA MIN TYP MAX 4 0.00 – ...

Page 3

ELECTRICAL CHARACTERISTICS ture range, otherwise specifications are at T Figure 1. PARAMETER Internal Buffer Bias Current Offset Voltage Voltage Swing Short-Circuit Current Source/Sink Clock (Note 3) Internal Oscillator Frequency Max Clock Frequency Pin 5 (Pin 11 in SW16) Source or ...

Page 4

LTC1062 W U TYPICAL PERFOR A CE CHARACTERISTICS Passband Gain vs Input Frequency and Temperature 0 ± 100kHz CLK 0 125° 1.62 2π –55°C A ...

Page 5

W BLOCK DIAGRA For Adjusting Oscillator Frequency, Insert a 50k Pot in Series with C SWITCHED FB 1 CAPACITOR NETWORK AGND 2 f CLK – CLOCK GEN 4 ÷ ÷ AC TEST CIRCUIT R = ...

Page 6

LTC1062 U U APPLICATIO S I FOR ATIO Filter Input Voltage Range Every node of the LTC1062 typically swings within 1V of either voltage supply, positive or negative. With the appro- priate external (RC) values, the amplitude response of all ...

Page 7

U U APPLICATIO S I FOR ATIO Divide (Pin connecting Pin mid supplies clock frequency driving the internal switched capacitor network is the oscillator frequency ...

Page 8

LTC1062 U TYPICAL APPLICATIO Adding an External (R1, C1) to Eliminate the Clock Feedthrough and Filtering AC Signals from High DC Voltages R 25. 0.01µ OUT HIGH DC ...

Page 9

U TYPICAL APPLICATIO S R1 10k Frequency Response of the Bandpass Filter ± R′1 = 0.8 –10 R′2 – 100mV IN –30 –40 ...

Page 10

LTC1062 U TYPICAL APPLICATIO S 25. 1µ AGND LTC1062 3 – – DIVIDER RATIO 10Hz, 10TH ORDER DC ACCURATE LOWPASS FILTER 60dB/OCTAVE ROLLOFF 0.5dB PASSBAND ERROR, 0dB DC GAIN MAXIMUM ATTENUATION 110dB (f ...

Page 11

U TYPICAL APPLICATIO S 7th Order 100Hz Lowpass Filter with Continuous Output Filtering, Output Buffering and Gain Adjustment 2. –5V 5V THE LTC1052 IS CONNECTED AS A 2ND ORDER SALLEN AND KEY LOWPASS FILTER WITH A CUTOFF FREQUENCY ...

Page 12

LTC1062 U TYPICAL APPLICATIO S R 9.09k 1µ AGND 3 – – DIVIDER RATIO 12 A Lowpass Filter with a 60Hz Notch R6 19.35k R3 R4 20k 10k R2 20k 8 ...

Page 13

PACKAGE DESCRIPTIO CORNER LEADS OPTION .045 – .068 (1.143 – 1.650) FULL LEAD OPTION .300 BSC (7.62 BSC) .008 – .018 (0.203 – 0.457) NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS U J8 Package 8-Lead CERDIP ...

Page 14

LTC1062 PACKAGE DESCRIPTIO .300 – .325 (7.620 – 8.255) .008 – .015 (0.203 – 0.381) +.035 .325 –.015 ( ) +0.889 8.255 –0.381 NOTE: 1. DIMENSIONS ARE MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR ...

Page 15

... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 16

... Clock Tunable, fc ≤ 120kHz Very Low Noise, 256Hz ≤ fc ≤ 256kHz Continuous Time, Very High Dynamic Range, PGA Included No External Clock Required, fc ≤ 64kHz, S08 No External Clock Required, fc ≤ 300kHz, S08 www.linear.com 1062fd LW/TP 1102 1K REV D • PRINTED IN USA  LINEAR TECHNOLOGY CORPORATION 1994 ...

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