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LTC1560-1CS8 Datasheet

  • LTC1560-1CS8

  • 1MHz/500kHz Continuous Time, Low Noise, Lowpass Elliptic Fil...

  • 278.41KB

  • 8頁

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LTC1560-1
1MHz/500kHz
Continuous Time,
Low Noise, Lowpass Elliptic Filter
FEATURES
s
s
s
s
s
s
s
5th Order, 1MHz Elliptic Filter in SO-8 Package
Pin Selectable 1MHz/500kHz Cutoff Frequency
Signal-to-Noise Ratio (SNR): 75dB
Signal-to-Noise Ratio with 鈥?63dB THD: 69dB
Passband Ripple (f
CUTOFF
= 1MHz):
鹵0.3dB
Stopband Attenuation Better Than 60dB
No External Components Required
either 500kHz (Pin 5 to V
+
) or 1MHz (Pin 5 to V
鈥?/div>
). When
programmed for 1MHz, the passband ripple is typically
鹵0.2dB
up to 0.55f
CUTOFF
and
鹵0.3dB
to 0.9f
CUTOFF
. The
transition band gain is 鈥?24dB at 1.4f
CUTOFF
and 鈥?51dB at
2f
CUTOFF
. Stopband attenuation is 63dB at 2.43f
CUTOFF
and
above, remaining at least 60dB to 10MHz with proper
board layout. When the LTC1560-1 is programmed for
f
CUTOFF
= 500kHz, the filter response closely follows the
1MHz case with the exception of passband flatness near
the cutoff frequency; the gain at f
CUTOFF
is 鈥?1.3dB.
The LTC1560-1, unlike other high frequency filters, is
designed for low noise and low distortion. With a 1V
RMS
input signal, the signal-to-noise ratio is 69dB and the THD
is 鈥?63dB. The maximum SNR of 75dB is obtained with a
2.1V
RMS
input signal. This results in 鈥?46dB THD.
The LTC1560-1 operates with
鹵5V
supplies, has a power
saving mode and is available in an SO-8 surface mount
package.
Other cutoff frequencies from 450kHz to 1.5MHz can be
obtained. Demo board DC135A is available for the
LTC1560-1. For more information please contact LTC
Marketing.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIONS
s
s
s
Antialiasing Filters
Smoothing or Reconstruction Filters
Communication Filters
DESCRIPTION
The LTC
廬
1560-1 is a 5th order, continuous-time, lowpass
filter.
The elliptic transfer function of the LTC1560-1 was
carefully chosen to reach a compromise between selectiv-
ity, for antialiasing applications, and transient response.
The filter cutoff frequency, f
CUTOFF
, is pin selectable to
TYPICAL APPLICATION
Frequency Response
1MHz/500kHz Elliptic Lowpass Filter
1
2
3
4
0.01碌F
鈥?5V
1MHz
5V
500kHz
1560-1 TA01
GND
V
IN
V
OUT
SHDN
LTC1560-1
GND
V
+
V
鈥?/div>
0.5f
C
/f
C
GAIN (dB)
V
IN
鈥?5V
0.1碌F
U
U
U
10
0
8
7
6
5
V
OUT
(OR 鈥?5V)
5V
0.1碌F
0.01碌F
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?60
鈥?0
鈥?80
f
CUTOFF
= 1MHz/500kHz
鈥?90
1
0.1
FREQUENCY (MHz)
10
1560-1 TA02
1

LTC1560-1CS8 產(chǎn)品屬性

  • LTC1560-1

  • 100

  • 集成電路 (IC)

  • 接口 - 濾波器 - 有源

  • -

  • 連續(xù)時間低通

  • 1MHz

  • 1

  • 5th

  • ±4.5 V ~ 5.5 V

  • 表面貼裝

  • 8-SOIC（0.154"，3.90mm 寬）

  • 8-SOIC

  • 管件

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