LTC1562CG#PBF Linear Technology, LTC1562CG#PBF Datasheet

IC FILTER UNIV RC QUAD LN 20SSOP

LTC1562CG#PBF

Manufacturer Part Number
LTC1562CG#PBF
Description
IC FILTER UNIV RC QUAD LN 20SSOP
Manufacturer
Linear Technology
Datasheet

Specifications of LTC1562CG#PBF

Filter Type
Universal, Continuous-Time
Frequency - Cutoff Or Center
150kHz
Number Of Filters
4
Max-order
8th
Voltage - Supply
4.75 V ~ 10.5 V, ±4.75 V ~ 5.25 V
Mounting Type
Surface Mount
Package / Case
20-SSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC1562CG#PBF
Manufacturer:
LTC
Quantity:
462
Company:
Part Number:
LTC1562CG#PBFLTC1562CG#TRPBF
Manufacturer:
LINEAR
Quantity:
6 457
Company:
Part Number:
LTC1562CG#PBFLTC1562CG#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LTC1562CG#PBFLTC1562CG-2
Quantity:
2 500
Company:
Part Number:
LTC1562CG#PBFLTC1562CG-2
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
V
V
IN2
IN1
5V
Continuous Time—No Clock
Four 2nd Order Filter Sections, 10kHz to 150kHz
Center Frequency
Wide Variety of Response Shapes
Lowpass, Bandpass and Highpass Responses
103dB Typical S/N, 5V Supply (Q = 1)
97dB Typical S/N, Single 5V Supply (Q = 1)
96dB Typical S/(N + THD) at 5V Supply, 20kHz Input
Rail-to-Rail Input and Output Voltages
DC Accurate to 3mV (Typ)
“Zero-Power” Shutdown Mode
Single or Dual Supply, 5V to 10V Total
Resistor-Programmable f
High Resolution Systems (14 Bits to 18 Bits)
Antialiasing/Reconstruction Filters
Data Communications, Equalizers
Dual or I-and-Q Channels (Two Matched 4th Order
Filters in One Package)
Linear Phase Filtering
Replacing LC Filter Modules
0.1 F
0.5% Typical Center Frequency Accuracy
0.3% Typical Center Frequency Accuracy (A Grade)
R
Dual 4th Order 100kHz Butterworth Lowpass Filter
10k
R
10k
IN3
IN1
R
R
R21, 10k
R23, 10k
Q1
Q3
, 5.62k
, 5.62k
U
10
1
2
3
5
6
8
9
INV B
V1 B
V2 B
V
SHDN
V2 A
V1 A
INV A
+
R
LTC1562
R
IN2
IN4
, 10k
, 10k
O
, Q, Gain
AGND
INV D
INV C
V1 C
V2 C
V2 D
V1 D
V
U
20
19
18
16
15
13
12
11
R
R22, 10k
R24, 10k
R
Q2
Q4
, 13k
0.1 F
, 13k
1562 TA01
V
V
–5V
OUT2
OUT1
SCHEMATIC INCLUDES PIN
NUMBERS FOR 20-PIN PACKAGE.
PINS 4, 7, 14, 17 (NOT SHOWN)
ALSO CONNECT TO V
SEE TYPICAL APPLICATIONS
FOR OTHER CUTOFF FREQUENCIES
DC ACCURATE, NONINVERTING,
UNITY-GAIN, RAIL-TO-RAIL
INPUT AND OUTPUTS. PEAK
SNR 100dB WITH 5V SUPPLIES
Active RC Quad Universal Filter
Very Low Noise, Low Distortion
DESCRIPTIO
The LTC
filter with rail-to-rail inputs and outputs, optimized for a
center frequency (f
monolithic filters, no clock is needed. Four independent 2nd
order filter blocks can be cascaded in any combination, such
as one 8th order or two 4th order filters. Each block’s
response is programmed with three external resistors for
center frequency, Q and gain, using simple design formulas.
Each 2nd order block provides lowpass and bandpass out-
puts. Highpass response is available if an external capacitor
replaces one of the resistors. Allpass, notch and elliptic
responses can also be realized.
The LTC1562 is designed for applications where dynamic
range is important. For example, by cascading 2nd order
sections in pairs, the user can configure the IC as a dual 4th
order Butterworth lowpass filter with 94dB signal-to-noise
ratio from a single 5V power supply. Low level signals can
exploit the built-in gain capability of the LTC1562. Varying the
gain of a section can achieve a dynamic range as high as
118dB with a 5V supply.
Other cutoff frequency ranges can be provided upon request.
Please contact LTC Marketing.
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
1562 is a low noise, low distortion continuous-time
O
U
) of 10kHz to 150kHz. Unlike most
–10
–20
–30
–40
–50
–60
–70
–80
10
0
10k
Amplitude Response
FREQUENCY (Hz)
100k
LTC1562
1562 TA03b
1562fa
1
1M

Related parts for LTC1562CG#PBF

LTC1562CG#PBF Summary of contents

Page 1

... LTC1562. Varying the gain of a section can achieve a dynamic range as high as 118dB with a 5V supply. Other cutoff frequency ranges can be provided upon request. Please contact LTC Marketing. , LTC and LT are registered trademarks of Linear Technology Corporation 13k Q2 ...

Page 2

LTC1562 ABSOLUTE AXI U RATI GS + – Total Supply Voltage ( .............................. 11V Maximum Input Voltage – at Any Pin ....................(V – 0.3V Storage Temperature Range ................. – ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T unless otherwise noted. AC specs are for a single 2nd order section, R SYMBOL PARAMETER Q Error Wideband Output Noise, Lowpass Response (V2 Output) Input-Referred Noise, Gain = 100 THD Total ...

Page 4

LTC1562 W U TYPICAL PERFOR A CE CHARACTERISTICS Q Error vs Nominal 2.5V ...

Page 5

PIN FUNCTIONS (Figure 1). For single supply operation, the AGND pin should be bypassed to the ground plane with at least a 0.1 F capacitor (at least 1 F for best AC performance) (Figure 2). These figures ...

Page 6

LTC1562 PIN FUNCTIONS INV A, INV B, INV C, INV D: Each of the INV pins is a virtual- ground summing point for the corresponding 2nd order section. For each section, external components Z R connect to ...

Page 7

... As shown above, R2 varies with the inverse ® square This software , Q and gain 0 Operational Filter and FilterCAD are trademarks of Linear Technology Corporation. Windows is a registered trademark of Microsoft Corporation. LTC1562 and Q . These transfer functions all and quality parameter Q. (The ...

Page 8

LTC1562 U U APPLICATIONS INFORMATION tolerance (by a factor of 2 incrementally), but it also implies that R2 has a wider range than f tend to scale with R2.) At high f these resistors fall below O 5k, heavily loading ...

Page 9

U U APPLICATIONS INFORMATION at frequency f , and for Q > 0.707, a gain peak occurs frequency below shown in Figure 4. O Basic Bandpass There are two different ways to obtain a ...

Page 10

LTC1562 U U APPLICATIONS INFORMATION Because 2nd order sections with Q peaks near f , the gain ratio above implies some rules of O thumb: f < 100kHz V2 tends to have the larger swing O f > 100kHz V1 ...

Page 11

U U APPLICATIONS INFORMATION external component Z , usually a resistor or capacitor. IN This component must of course be rated to sustain the magnitude of voltage imposed on it. Lowpass “T” Input Circuit The virtual ground INV input in ...

Page 12

LTC1562 U U APPLICATIONS INFORMATION This procedure can be iterated, adjusting the value find convenient values for C and C INA values are generally available in finer increments than capacitor values. Different “f ” Measures O Standard ...

Page 13

U TYPICAL APPLICATIONS Quad 3rd Order Butterworth Lowpass Filter, Gain = – OUT1 R R IN1A IN1B 1 V INV B IN1 IN1 R21 LTC1562 ...

Page 14

LTC1562 U TYPICAL APPLICATIONS Dual 4th Order Lowpass Filters R IN2 R IN1 1 INV C V INV B IN2 R21 – 5V LTC1562 V V ...

Page 15

U TYPICAL APPLICATIONS 8th Order Lowpass Filters R IN2 R IN1 20 1 INV C V INV R21 – LTC1562 ...

Page 16

LTC1562 U TYPICAL APPLICATIONS 8th Order Bandpass Filter, Single 5V Supply, Center Frequency – 3dB Bandwidth = R IN2 C IN1 1 INV C V INV R21 ...

Page 17

U TYPICAL APPLICATIONS 8th Order Bandpass Filter, Single 5V Supply, Center Frequency – 1dB Bandwidth = 10 R IN2 R IN1 20 1 INV C V INV R21 3 18 ...

Page 18

LTC1562 U TYPICAL APPLICATIONS 8th Order Bandpass (High Frequency) Filter Center Frequency – 3dB Bandwidth = 10 R IN2 R IN1 20 1 INV C V INV R21 3 18 ...

Page 19

U TYPICAL APPLICATIONS 8th Order Wideband Bandpass Filter f = 50kHz, – 3dB BW 40kHz to 60kHz CENTER R IN2 69.8k C IN1 22pF INV C INV 59k ...

Page 20

... Examples and design procedures for practical filters using these techniques appear in a series of articles attached to this data sheet on the Linear Technology web site (www.linear-tech.com). Also available free is the analog filter design software, FilterCAD for Windows, recom- mended for designing filters not shown in the Typical Applications schematics in this data sheet ...

Page 21

U U APPLICATIONS INFORMATION Note that the depth of the notch depends on the accuracy of this resistor ratioing. The virtual-ground summing point in Figure 11 may be from an op amp as shown practical cascaded filter, ...

Page 22

LTC1562 U U APPLICATIONS INFORMATION The configuration is robust against tolerances in the C value when f approaches f (for thumb) which is attractive in narrow transition-band fil- ters, because of the relative cost of high ...

Page 23

U U APPLICATIONS INFORMATION R-C Universal Notches A different way to get 180 phase shift for a notch is to use the built-in 90 phase difference between the two Opera- tional Filter block outputs along with a further 90 from ...

Page 24

... R24 32. 11. OUT R 32.4k IN4 C 10pF IN4 USES THREE R-C UNIVERSAL NOTCHES AT f 1562 TA12a DETAILED DESCRIPTION IN LINEAR TECHNOLOGY DESIGN NOTE 195. – WIDEBAND OUTPUT NOISE 93.1k IN2 20 INVC R 84. V1C R22 10k 18 V2C 16 – V – AGND ...

Page 25

U TYPICAL APPLICATIONS R R IN1A IN1B 140k 69. IN1 390pF + V 0.1 F Amplitude Response 10 0 –10 – 20 – 30 – 40 – 50 – 60 –70 – 80 – ...

Page 26

LTC1562 U TYPICAL APPLICATIONS Dual 5th Order Lowpass “Elliptic” Filter IN1A IN1B 1 V INVB IN1 IN1 V1B R21 3 V2B LTC1562 0 SHDN R21 8 V2A ...

Page 27

... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) 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 28

... No External Components, SO8 Same Pinout as the LTC1562 f = 256kHz, Resistor Programmable CUTOFF(MAX) Continuous Time Low Noise 8th Order with PGA 7th Order, Differential Inputs and Outputs 7th Order, Differential Inputs and Outputs LT/TP REV A 0102 1.5K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1998 1562fa ...

Related keywords