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LTC1562CG-2 Datasheet

  • LTC1562CG-2

  • Very Low Noise, Low Distortion Active RC Quad Universal Filt...

  • 182.57KB

  • 16頁

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LTC1562-2
Very Low Noise, Low Distortion
Active RC Quad Universal Filter
FEATURES
s
s
DESCRIPTIO
s
s
s
s
s
s
s
s
s
s
Continuous Time鈥擭o Clock
Four 2nd Order Filter Sections, 20kHz to 300kHz
Center Frequency
Butterworth, Chebyshev, Elliptic or Equiripple
Delay Response
Lowpass, Bandpass, Highpass Responses
99dB Typical S/N,
鹵5V
Supply (Q = 1)
93dB Typical S/N, Single 5V Supply (Q = 1)
Rail-to-Rail Input and Output Voltages
DC Accurate to 3mV (Typ)
鹵0.5%
Typical Center Frequency Accuracy
鈥淶ero-Power鈥?Shutdown Mode
Single or Dual Supply, 5V to 10V Total
Resistor-Programmable f
O
, Q, Gain
APPLICATIO S
s
s
s
s
s
s
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
The LTC
廬
1562-2 is a low noise, low distortion continuous
time filter with rail-to-rail inputs and outputs, optimized for a
center frequency (f
O
) of 20kHz to 300kHz. Unlike most
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鈥檚
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 LTC1562-2 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 90dB signal-to-noise
ratio from a single 5V power supply. Low level signals can
exploit the built-in gain capability of the LTC1562-2. Varying
the gain of a section can achieve a dynamic range as high as
114dB with a
鹵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.
TYPICAL APPLICATIO
Dual 4th Order 200kHz Butterworth Lowpass Filter, SNR 96dB
R
IN2
7.87k
R
IN1
7.87k
V
IN1
R
Q1
4.22k
R21 7.87k
5V
0.1碌F
R23 7.87k
R
Q3
4.22k
R
IN3
7.87k
V
IN2
*V
鈥?/div>
ALSO AT PINS 4, 7, 14 & 17
ALL RESISTORS 1% METAL FILM
1
2
3
5
6
8
9
10
20
19
18
16
15
13
12
11
R
IN4
7.87k
1562-2 TA01
10
V
OUT1
R
Q2
10.2k
R22 7.87k
鈥?5V*
0.1碌F
R24 7.87k
R
Q4
10.2k
GAIN (dB)
0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
50k
100k
FREQUENCY (Hz)
1562-2 TA02
INV B
V1 B
V2 B
V
+
INV C
V1 C
V2 C
LTC1562-2 V
鈥?/div>
AGND
V2 D
V1 D
INV D
SHDN
V2 A
V1 A
INV A
V
OUT2
U
Amplitude Response
1M
1.5M
U
U
1

LTC1562CG-2 產(chǎn)品屬性

  • LTC1562-2

  • 66

  • 集成電路 (IC)

  • 接口 - 濾波器 - 有源

  • -

  • 通用連續(xù)計時

  • 300kHz

  • 4

  • 8th

  • 4.75 V ~ 10.5 V，±4.75 V ~ 5.25 V

  • 表面貼裝

  • 20-SSOP（0.209"，5.30mm 寬）

  • 20-SSOP

  • 管件

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