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參數(shù)資料
| 型號(hào)： | LTC1569IS8-7#TRPBF |
| 廠商： | Linear Technology |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大小： | 0K |
| 描述： | IC FILTER 10TH ORDR LOWPASS8SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 濾波器類(lèi)型： | 線性相位，低通開(kāi)關(guān)電容器 |
| 頻率 - 截止或中心： | 300kHz |
| 濾波器數(shù)： | 1 |
| 濾波器階數(shù)： | 10th |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 帶卷 (TR) |
1
LTC1569-7
TYPICAL APPLICATION
U
DESCRIPTIO
U
APPLICATIO S
U
FEATURES
s
One External R Sets Cutoff Frequency
s
Root Raised Cosine Response
s
Up to 300kHz Cutoff on a Single 5V Supply
s
Up to 150kHz Cutoff on a Single 3V Supply
s
10th Order, Linear Phase Filter in an SO-8
s
DC Accurate, VOS(MAX) = 5mV
s
Low Power Modes
s
Differential or Single-Ended Inputs
s
80dB CMRR (DC)
s
80dB Signal-to-Noise Ratio, VS = 5V
s
Operates from 3V to
±5V Supplies
The LTC
1569-7 is a 10th order lowpass filter featuring
linear phase and a root raised cosine amplitude response.
The high selectivity of the LTC1569-7 combined with its
linear phase in the passband makes it suitable for filtering
both in data communications and data acquisition sytems.
s
Data Communication Filters for 3V Operation
s
Linear Phase and Phase Matched Filters for I/Q
Signal Processing
s
Pin Programmable Cutoff Frequency Lowpass Filters
Furthermore, its root raised cosine response offers the
optimum pulse shaping for PAM data communications.
The filter attenuation is 57dB at 1.5 fCUTOFF, 60dB at 2
fCUTOFF, and in excess of 80dB at 6 fCUTOFF. DC-accuracy-
sensitive applications benefit from the 5mV maximum DC
offset.
The LTC1569-7 is the first sampled data filter which does
not require an external clock yet its cutoff frequency can be
set with a single external resistor with a typical accuracy
of 3.5% or better. The external resistor programs an
internal oscillator whose frequency is divided by either 1,
4 or 16 prior to being applied to the filter network. Pin 5
determines the divider setting. Thus, up to three cutoff
frequencies can be obtained for each external resistor
value. Using various resistor values and divider settings,
the cutoff frequency can be programmed over a range of
seven octaves. Alternatively, the cutoff frequency can be
set with an external clock and the clock-to-cutoff fre-
quency ratio is 32:1. The ratio of the internal sampling rate
to the filter cutoff frequency is 64:1.
The LTC1569-7 is fully tested for a cutoff frequency of
256kHz/128kHz with single 5V/3V supply although up to
300kHz cutoff frequencies can be obtained.
The LTC1569-7 features power savings modes and it is
available in an SO-8 surface mount package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Frequency Response, fCUTOFF = 128kHz/32kHz/8kHz
Single 3V Supply, 128kHz/32kHz/8kHz Lowpass Filter
Linear Phase, DC Accurate,
Tunable, 10th Order Lowpass Filter
FREQUENCY (kHz)
1
GAIN
(dB)
0
–20
–40
–60
–80
–100
10
100
1000
1569-7 TA01a
18
27
36
45
1
F
3V
1/4
1/16
1/1
3V
REXT = 10k
100pF
1
F
2k
3.48k
3V
LTC1569-7
EASY TO SET fCUTOFF:
fCUTOFF =
128kHz (10k/REXT)
1, 4 OR 16
1569-7 TA01
IN+
IN–
GND
V–
OUT
VIN
VOUT
V+
RX
DIV/CLK
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