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LTC1064-4CSW Datasheet

  • LTC1064-4CSW

  • Analog Filter

  • 12頁

  • ETC

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LTC1064-4
Low Noise, 8th Order, Clock
Sweepable Cauer Lowpass Filter
FEATURES
鈻?/div>
鈻?/div>
鈻?/div>
DESCRIPTIO
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
8th Order Filter in a 14-Pin Package
80dB or More Stopband Attenuation at 2
脳
f
CUTOFF
50:1, f
CLK
to f
CUTOFF
Ratio (Cauer)
100:1, f
CLK
to f
鈥?dB
Ratio (Transitional)
135碌V
RMS
Total Wideband Noise
0.03% THD or Better
100kHz Maximum f
CUTOFF
Frequency
Operates up to
鹵8V
Power Supplies
Input Frequency Range up to 50 Times the Filter
Cutoff Frequency
APPLICATIO S
鈻?/div>
鈻?/div>
鈻?/div>
The LTC
廬
1064-4 is an 8th order, clock sweepable Cauer
lowpass switched capacitor filter. An external TTL or
CMOS clock programs the value of the filter鈥檚 cutoff
frequency. With Pin 10 at V
+
, the f
CLK
to f
CUTOFF
ratio is
50:1; the filter has a Cauer response and with compensa-
tion the passband ripple is
鹵0.1dB.
The stopband attenu-
ation is 80dB at 2
脳
f
CUTOFF
. Cutoff frequencies up to
100kHz can be achieved. With Pin 10 at V
鈥?/div>
, the f
CLK
to
f
鈥?dB
ratio is 100:1, the filter has a transitional Butterworth-
Cauer response with lower noise and lower delay
nonlinearity than the Cauer response. The stopband
attenuation at 2.5
脳
f
鈥?dB
is 92dB. Cutoff frequencies up to
50kHz can be achieved.
The LTC1064-4 features low noise and low harmonic
distortion even when input voltages up to 3V
RMS
are
applied. The LTC1064-4 overall performance competes
with equivalent multiple op amp active realizations. The
LTC1064-4 is pin compatible with the LTC1064-1,
LTC1064-2 and LTC1064-3.
The LTC1064-4 is manufactured using Linear Technology鈥檚
enhanced LTCMOS
TM
silicon gate process.
Antialiasing Filters
Telecom Filters
Sinewave Generators
, LTC and LT are registered trademarks of Linear Technology Corporation.
LTCMOS is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
1
V
IN
2
3
8V
0.1碌F
INV C
V
IN
R(h, I)
COMP2*
8th Order Clock Sweepable Lowpass Elliptic Filter
14
13
鈥?V
0.1碌F
20
0
鈥?0
鈥?0
鈥?0
Frequency Response
T
A
= 25擄C
f
CLK
= 5MHz, 50:1
C
COMP1
= 30pF, C
COMP2
= 18pF
12
V
鈥?/div>
AGND
4
+
LTC1064-4
11
CLOCK
f
CLK
V
(TTL,
鈮?MHz)
5
10
+ 鈥?/div>
50/100
AGND
V /V
6
7
COMP1*
INV A
V
OUT
NC
9
8
V
OUT
V
OUT
/V
IN
(dB)
f
CLK
= 2MHz, 50:1
鈥?0
鈥?00
f
CLK
= 1MHz, 100:1
1k
10k
100k
FREQUENCY (Hz)
1M
1064-4 TA01b
1064 TA01
* FOR FREQUENCIES ABOVE 20kHz AND MINIMUM PASSBAND RIPPLE REFER
TO THE PIN DESCRIPTION SECTION FOR COMPENSATION GUIDELINES.
NOTE:THE POWER SUPPLIES SHOULD BE BYPASSED BY A 0.1碌F CAPACITOR
CLOSE TO THE PACKAGE. BYPASSING PIN 10 WITH 0.1碌F CAPACITOR
REDUCES CLOCK FEEDTHROUGH. THE CONNECTION BETWEEN PINS 7
AND 14 SHOULD BE PHYSICALLY DONE UNDER THE PACKAGE.
U
10644fb
U
U
1

LTC1064-4CSW 產(chǎn)品屬性

  • LTC1064-4

  • 47

  • 集成電路 (IC)

  • 接口 - 濾波器 - 有源

  • -

  • 考爾，低通開關(guān)電容器

  • 100kHz

  • 1

  • 8th

  • ±2.37 V ~ 8 V

  • 表面貼裝

  • 16-SOIC（0.295"，7.50mm 寬）

  • 16-SOIC

  • 管件

  • LTC1064-4CS

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