- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385502 > LTC1264CSW (LINEAR TECHNOLOGY CORP) High Speed, Quad Universal Filter Building Block PDF資料下載
參數(shù)資料
| 型號： | LTC1264CSW |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | High Speed, Quad Universal Filter Building Block |
| 中文描述： | QUAD SWITCHED CAPACITOR FILTER, BUTTERWORTH/CHEBYSHEV, UNIVERSAL, PDSO24 |
| 封裝： | 0.300 INCH, PLASTIC, SOP-24 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 227K |
| 代理商： | LTC1264CSW |
11
LTC1264
1264fb
U
S
A
For example, for an LTC1264 bandpass filter with f
CENTER
= 100kHz and f
CLK
= 2MHz, a 3.9MHz, 10mV input will
produce a 100kHz, 10mV output. A 1st or 2nd order
prefilter will reduce aliasing to acceptable levels in most
cases.
O
PPLICATI
U
U
A GUIDE TO BANDPASS DESIGN
Filter design tools like FCAD require design specification
inputs such as passband ripple, attenuation, passband
width and stopband width in order to calculate filter
parameters f
O
, Q, f
n
or poles and zeroes. The results of
these filter approximations most often require Q values
which make excessive demands on the gain-bandwidth
products of active filter realizations. The active filter de-
signer should define a gain response so that the filter’s
mathematical approximation has practical requirements.
Table 4 is a guide to practical design specifications for
realizing bandpass filters with LTC1264 (please also refer
to the Typical Maximum Q vs Clock Frequency and Band-
pass Gain Error graphs under Typical Performance Char-
acteristics).
A Bandpass Design Example
Filter Type:
Filter Response:
Passband Ripple:
Attenuation:
Center Frequency:
Passband Width:
Stopband Width:
Bandpass
Butterworth
3dB
60dB
40kHz (f
CENTER
)
10kHz
60kHz
Implementing the Bandpass Design
With the LTC1264 in Mode 1b, Butterworth and Chebyshev
bandpass designs with f
CLK
to f
CENTER
ratios greater than
20:1 are possible.
First choose the clock frequency which in Mode 1b must
be greater than 20 times the bandpass center frequency of
40kHz. For this example, let’s choose f
CLK
to be 1MHz.
Table 6 lists the resistors for for the bandpass design
example and Figure 11 shows the complete circuit.
Table 4. Bandpass Design Specifications (f
CENTER
is center
frequency of passband.)
PASSBAND
PASSBAND
RIPPLE
WIDTH
(dB)
(Hz)
≤
3dB for Butterworth
≥
f
CENTER
/20
≤
0.1 for Chebyshev
≥
f
CENTER
/20
Note: Reducing passband ripple or attenuation will decrease Q values. The
filter order may also increase.
STOPBAND
WIDTH
(Hz)
≥
5
×
Passband
≥
5
×
Passband
ATTENU-
ATION
(dB)
–40 to –60
–40 to –60
Table 5. Calculated Filter Parameters
STAGE
1
2
3
4
f
O
Q
38.1201kHz
41.9726kHz
35.6418kHz
44.8911kHz
4.3346
4.3346
10.5221
10.5221
Table 6. Calculated Mode 1b Resistors to Nearest 1% Value
Using Table 5 Filter Parameters and Figure 10 Equations
STAGE
1
3
4
R1
52.3k
47.5k
56.2k
44.2k
R2
10k
10k
10k
10k
R3
56.2k
51.1k
147k
118k
R5
5k
5k
5k
5k
R6
6.98k
11.8k
5.11k
20.5k
Figure 10. Equations for Resistors in Mode 1b Operation
R2 = 10k
R5 = 5k
f
i
=
R1 = H
OBP
R5f
O
f
i
√
R2Q
R6
R6 + 5
(
R6 =
H
OBP
= + 1
Q
2
f
CENTER
R3 =
R3
2
2
–
f
O
2
(
)
(
)
f
O
–
f
CENTER
f
O
(
)
2
)
√
1264 F10
f
CLK
20
相關PDF資料 |
PDF描述 |
|---|---|
| LTC1265-3.3 | 1.2A, High Efficiency Step-Down Current Mode DC/DC Converter(3.3V,12A,高效率,電流模式步降DC/DC變換器) |
| LTC1265-5 | 1.2A, High Efficiency Step-Down Current Mode DC/DC Converter(5V,12A,高效率,電流模式步降DC/DC變換器) |
| LTC1266-3.3 | Synchronous Switching Regulator Controller for N- or P-Channel MOSFETs(3.3V,同步穩(wěn)壓控制器(用于N或P溝道MOS場效應管)) |
| LTC1272(中文) | 12-Bit 3μS 250KHz Sampling ADC(12位3μs 250KHz采樣ADC) |
| LTC1290(中文) | Single Chip 12-Bit Data Acquisition System(單片八通道12位數(shù)據(jù)采集系統(tǒng)) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1264CSW#PBF | 功能描述:IC FILTR BUILDNG BLK HISPD24SOIC 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) |
| LTC1264CSW#TR | 功能描述:IC FILTER BUILD BLK QUAD 24-SOIC 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) |
| LTC1264CSW#TRPBF | 功能描述:IC FILTER BUILD BLK QUAD 24-SOIC 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) |
| LTC1265CS | 功能描述:IC REG BUCK ADJ 1.2A 14SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應商設備封裝:10-MSOP 裸露焊盤 |
| LTC1265CS#PBF | 功能描述:IC REG BUCK ADJ 1.2A 14SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應商設備封裝:10-MSOP 裸露焊盤 |
發(fā)布緊急采購，3分鐘左右您將得到回復。