參數(shù)資料
型號： LTC1560-1IS8
廠商： LINEAR TECHNOLOGY CORP
元件分類： 運動控制電子
英文描述： Advanced,Self-Calibrating, Precision, Dual Operational Amplifier 10-CFP -55 to 125
中文描述： CONTINUOUS TIME FILTER, ELLIPTIC, LOWPASS, PDSO8
封裝： 0.150 INCH, PLASTIC, SO-8
文件頁數(shù)： 1/8頁
文件大小： 274K
代理商： LTC1560-1IS8
1
LTC1560-1
1MHz/500kHz
Continuous Time,
Low Noise, Lowpass Elliptic Filter
FEATURES
I
5th Order, 1MHz Elliptic Filter in SO-8 Package
I
Pin Selectable 1MHz/500kHz Cutoff Frequency
I
Signal-to-Noise Ratio (SNR): 75dB
I
Signal-to-Noise Ratio with –63dB THD: 69dB
I
Passband Ripple (f
CUTOFF
= 1MHz):
±
0.3dB
I
Stopband Attenuation Better Than 60dB
I
No External Components Required
either 500kHz (Pin 5 to V
+
) or 1MHz (Pin 5 to V
–
). When
programmed for 1MHz, the passband ripple is typically
±
0.2dB up to 0.55f
CUTOFF
and
±
0.3dB to 0.9f
CUTOFF
. The
transition band gain is –24dB at 1.4f
CUTOFF
and –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 –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 –63dB. The maximum SNR of 75dB is obtained with a
2.1V
RMS
input signal. This results in –46dB THD.
The LTC1560-1 operates with
±
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.
FREQUENCY (MHz)
0.1
–90
G
–70
–50
–30
–10
1
10
1560-1 TA02
10
–80
–60
–40
–20
0
f
CUTOFF
= 1MHz/500kHz
Frequency Response
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
N
U
DESCRIPTIO
N
U
The LTC
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
I
Antialiasing Filters
I
Smoothing or Reconstruction Filters
I
Communication Filters
APPLICATIO
S
U
V
IN
V
OUT
5V
(OR –5V)
0.01
μ
F
0.1
μ
F
0.1
μ
F
–5V
1560-1 TA01
0.01
μ
F
–5V
1MHz
5V
500kHz
GND
V
–
V
+
GND
V
IN
1
4
3
2
8
5
6
7
V
OUT
SHDN
0.5f
C
/f
C
LTC1560-1
1MHz/500kHz Elliptic Lowpass Filter
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