參數(shù)資料
型號(hào)： LT1568IGN#TRPBF
廠(chǎng)商： Linear Technology
文件頁(yè)數(shù)： 1/16頁(yè)
文件大?。?/td> 0K
描述： IC BLOCK BUILD FLTR LONOS 16SSOP
標(biāo)準(zhǔn)包裝： 2,500
濾波器類(lèi)型： 帶通
頻率 - 截止或中心： 200kHz
濾波器數(shù)： 2
濾波器階數(shù)： 2nd
電源電壓： 2.7 V ~ 11 V，±2.7 V ~ 5.5 V
安裝類(lèi)型： 表面貼裝
封裝/外殼： 16-SSOP（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 16-SSOP
包裝： 帶卷 (TR)
LT1568
1
1568f
The LT
1568 is an easy-to-use, active-RC filter building
block with rail-to-rail inputs and outputs. The internal ca-
pacitors of the IC and the GBW product of the internal low
noise op amps are trimmed such that consistent and repeat-
able filter responses can be achieved. With a single resis-
tor value, the LT1568 provides a pair of matched 2-pole
Butterworth lowpass filters with unity gain suitable for I/Q
channels.
By using unequal-valued external resistors, the two 2-pole
sections can create different frequency responses or
gains. In addition, the two stages may be cascaded to
create a single 4-pole filter with a programmable re-
sponse. Capable of cutoff frequencies up to 10MHz, the
LT1568 is ideal for antialiasing or channel filtering in high
speed data communications systems. The LT1568 can
also be used as a bandpass filter.
The LT1568 features very low noise, supporting signal-to-
noise ratios of over 90dB. It also provides single-ended to
differential signal conversion for directly driving high
speed A/D converters. The LT1568 has a shutdown mode
that reduces supply current to approximately 0.5mA on a
5V supply.
The LT1568 is available in a narrow 16-lead SSOP
package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
s
Up to 10MHz Center Frequency on a Single 3V
Supply
s
Easy to Use—A Single Resistor Value Sets Lowpass
Cutoff Frequency (200kHz
≤ C ≤ 5MHz), Unequal
Resistor Values Extend Cutoff Frequency Up to
10MHz
s
Extremely Flexible—Different Resistor Values
Allow Lowpass Transfer Functions with or Without
Gain (Butterworth, Chebyshev or Custom)
s
SNR = 92dB (
C = 2MHz, 2VP-P)
s
THD = –84dB (
C = 2MHz, 1VP-P)
s
Internal Capacitors Trimmed to
±0.75%
s
Single 4-Pole Lowpass Filter or Matched Pair of
2-Pole Lowpass Filters
s
Can be Connected as a Bandpass Filter
s
Single-Ended or Differential Output
s
Operates from Single 3V (2.7V Min) to
±5V Supply
s
Rail-to-Rail Input and Output Voltages
Very Low Noise,
High Frequency Active RC,
Filter Building Block
s
Replaces Discrete RC Active Filters and LC Filter
Modules
s
Antialiasing/Reconstruction Filters
s
Dual or I-and-Q Channels (Two Matched 2nd Order
Filters in One Package)
s
Single-Ended to Differential Conversion
s
Video Signal Processing
V+
INVA
SA
OUTA
GNDA
NC
V–
V+
INVB
SB
OUTB
GNDB
EN
V–
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
LT1568
511
0.1
F
0.1
F
511
511
511
511
1568 TA01
VINA
3V
VOUTA
VINB
THE PROPRIETARY ARCHITECTURE
ALLOWS FOR A SIMPLE RESISTOR
CALCULATION:
VOUTB
511
R = 128
; C = CUTOFF FREQUENCY
10MHz
C
Amplitude and Phase Matched Dual Butterworth 2.5MHz Lowpass
Filter with Differential Output. Single 3V Supply Operation
FREQUENCY (Hz)
100k
–27
GAIN
(dB)
–21
–15
–9
–3
1M
10M
1568 TA02
3
–24
–18
–12
–6
0
Amplitude Response
DESCRIPTIO
U
FEATURES
APPLICATIO S
U
TYPICAL APPLICATIO
U
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參數(shù)描述
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