- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385505 > LTC1569-7 (Linear Technology Corporation) Linear Phase, DC Accurate, Tunable, 10th Order Lowpass Filter(線性脈沖，直流精度，可調(diào)諧的10階低通濾波器) PDF資料下載
參數(shù)資料
| 型號： | LTC1569-7 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Linear Phase, DC Accurate, Tunable, 10th Order Lowpass Filter(線性脈沖，直流精度，可調(diào)諧的10階低通濾波器) |
| 中文描述： | 線性相位，直流準確，可調(diào)諧，第10階低通濾波器（線性脈沖，直流精度，可調(diào)諧的10階低通濾波器） |
| 文件頁數(shù)： | 9/12頁 |
| 文件大小： | 227K |
| 代理商： | LTC1569-7 |
9
LTC1569-7
Table 2. Wideband Noise vs Supply Voltage, Single 3V Supply
Bandwidth
DC to f
CUTOFF
DC to 2 f
CUTOFF
DC to f
CLK
Total Integrated Noise
105
μ
V
RMS
125
μ
V
RMS
155
μ
V
RMS
Table 3. Wideband Noise vs Supply Voltage, f
CUTOFF
= 128kHz
Total Integrated Noise
DC to 2 f
CUTOFF
125
μ
V
RMS
135
μ
V
RMS
145
μ
V
RMS
Power Supply
3V
5V
±
5V
Clock Feedthrough
Clock feedthrough is defined as the RMS value of the clock
frequency and its harmonics that are present at the filter’s
OUT pin (Pin 8). The clock feedthrough is measured with
IN
+
and IN
–
(Pins 1 and 2) grounded and depends on the
PC board layout and the power supply decoupling. Table4
shows the clock feedthrough (the RMS sum of the first 11
harmonics) when the LTC1569-7 is self-clocked with
R
EXT
= 10k, DIV/CLK (Pin 5) open (divide-by-4 mode). The
clock feedthrough can be reduced with a simple RC post
filter.
Table 4. Clock Feedthrough
Power Supply
3V
5V
±
5V
Feedthrough
0.4mV
RMS
0.6mV
RMS
0.9mV
RMS
DC Accuracy
DC accuracy is defined as the error in the output voltage
after DC offset and DC gain errors are removed. This is
similar to the definition of the integral nonlinearity in A/D
converters. For example, after measuring values of V
OUT(DC)
vs V
IN(DC)
for a typical LTC1569-7, a linear regression
shows that V
OUT(DC)
= V
IN(DC)
0.99854 + 0.00134V is the
straight line that best fits the data. The DC accuracy
describes how much the actual data deviates from this
straight line (i.e., DCERROR = V
OUT(DC)
– (V
IN(DC)
0.99854
+ 0.00134V). In a 12-bit system with a full-scale value of
2V, the LSB is 488
μ
V. Therefore, if the DCERROR of the
filter is less than 488
μ
V over a 2V range, the filter has
APPLICATIO
S I
N
FOR
ATIO
U
W
U
12-bit DC accuracy. Figure 9 illustrates the typical DC
accuracy of the LTC1569-7 on a single 5V supply.
Figure 9
V
IN
DC (V)
–1.5
–1.0
–0.5
0
0.5
1.0
1.5
1569-7 F09
488
244
000
–244
–488
V
S
= 5V
R
EXT
= 10k
T
A
= 25
°
C
D
μ
V
DC Offset
The output DC offset of the LTC1569-7 is trimmed to less
than
±
5mV. The trimming is performed with V
S
= 1.9V,
–1.1V with the filter cutoff frequency set to 8kHz (R
EXT
=
10k, DIV/CLK shorted to V
+
). To obtain optimum DC offset
performance, appropriate PC layout techniques should be
used. The filter IC should be soldered to the PC board. The
power supplies should be well decoupled including a 1
μ
F
ceramic capacitor from V
+
(Pin 7) to V
–
(Pin 4). A ground
plane should be used. Noisy signals should be isolated
from the filter input pins.
When the power supply is 3V, the output DC offset should
not change more than
±
2mV when the clock frequency
varies from 64kHz to 8192kHz. When the clock frequency
is fixed, the output DC offset will typically change by
±
3mV
(
±
15mV) when the power supply varies from 3V to 5V
(
±
5V) in the divide-by-1 mode. In the divide-by-4 or
divide-by-16 modes, the output DC offset will typically
change –9mV (–27mV) when the power supply varies
from 3V to 5V (
±
5V). The offset is measured with respect
to GND (Pin 3).
Aliasing
Aliasing is an inherent phenomenon of sampled data
filters. In lowpass filters significant aliasing only occurs
when the frequency of the input signal approaches the
sampling frequency or multiples of the sampling fre-
quency. The LTC1569-7 samples the input signal twice
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1623 | SMBus Dual High Side Switch Controller(SMBus 雙高邊開關(guān)穩(wěn)壓器) |
| LTC1654 | Dual 14-Bit Rail-to-Rail DAC in 16-Lead SSOP Package(雙路14位,滿幅度電壓輸出數(shù)模轉(zhuǎn)換器(16腳SSOP封裝)) |
| LTC1655 | 16-Bit Rail-to-Rail Micropower DACs in SO-8 Package(16位,微功耗滿幅度電壓輸出數(shù)模轉(zhuǎn)換器(SO-8封裝,內(nèi)部基準2.048V)) |
| LTC1655L | 16-Bit Rail-to-Rail Micropower DACs in SO-8 Package(16位,微功耗滿幅度電壓輸出數(shù)模轉(zhuǎn)換器(SO-8封裝,內(nèi)部基準1.25V)) |
| LTC1657 | Parallel 16-Bit Rail-to-Rail Micropower DAC(并行16位,微功耗滿幅度電壓輸出數(shù)模轉(zhuǎn)換器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1569CS8-6 | 功能描述:IC FILTER 10TH ORDR LOWPASS8SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1,000 系列:- 濾波器類型:連續(xù)時間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數(shù):4 濾波器階數(shù):8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) |
| LTC1569CS8-6#PBF | 功能描述:IC FILTER 10TH ORDR LOWPASS8SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1,000 系列:- 濾波器類型:連續(xù)時間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數(shù):4 濾波器階數(shù):8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) |
| LTC1569CS8-6#PBF | 制造商:Linear Technology 功能描述:IC FILTER LOW PASS 64KHZ 8-SOIC 制造商:Linear Technology 功能描述:IC, FILTER, LOW PASS, 64KHZ, 8-SOIC |
| LTC1569CS8-6#TR | 功能描述:IC FILTER LP 10TH ORD LIN 8SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1,000 系列:- 濾波器類型:連續(xù)時間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數(shù):4 濾波器階數(shù):8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) |
| LTC1569CS8-6#TRPBF | 功能描述:IC FILTER 10TH ORDR LOWPASS8SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1,000 系列:- 濾波器類型:連續(xù)時間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數(shù):4 濾波器階數(shù):8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) |
發(fā)布緊急采購，3分鐘左右您將得到回復。