- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384545 > ISPPAC81 (Lattice Semiconductor Corporation) In-System Programmable Analog Circuit PDF資料下載
參數(shù)資料
| 型號： | ISPPAC81 |
| 廠商： | Lattice Semiconductor Corporation |
| 英文描述： | In-System Programmable Analog Circuit |
| 中文描述： | 在系統(tǒng)可編程模擬電路 |
| 文件頁數(shù)： | 9/20頁 |
| 文件大?。?/td> | 176K |
| 代理商： | ISPPAC81 |
Lattice Semiconductor
ispPAC81 Data Sheet
9
Theory of Operation
Reference Con
fi
guration
In the speci
fi
cations table, speci
fi
c
fi
lter con
fi
gurations are referred to, such as the CC055042 at 17.62kHz. This is
simply a shorthand notation for the classical
fi
lter type that includes all the characteristic parameters of the particu-
lar con
fi
guration. In this case, the CC refers to complete Chebyshev, or a Chebyshev ripple response in both the
pass and stopbands of the
fi
lter. Another common name for this type of
fi
lter is the Elliptic family of
fi
lters. The next
set of numbers, “05” refers to the order of the
fi
lter. In the case of ispPAC81 this will always be
fi
fth order. The next
two digits signify the re
fl
ection coef
fi
cient (rf), in this case 10%, and has a direct mathematical relationship to the
passband ripple magnitude of the
fi
lter, where the passband ripple expressed in dB = 10*Log(1-rf
2
). The
fi
nal two
digits are the passband to stopband attenuation ratio expressed as an angle, in this case 42 degrees or 1.49 (1/
sin((
π
/180)*42)). This con
fi
guration corresponds to the elliptical
fi
lter with the ID# 1088 (Fp=17.62kHz;
Fc=17.96kHz) in the
fi
lter con
fi
guration database utility of PAC-Designer. Because of the almost limitless number of
con
fi
gurations realizable with ispPAC81, standard test con
fi
gurations had to be chosen. The Elliptical family was
chosen since it has many parameters that can be easily and directly measured to insure that all the internal circuits
of ispPAC81 are operating correctly.
Figure 1. Simplified ispPAC81 Filter Core Schematic
A1
A3
A4
A5
A2
C1
L2
C3
L4
C5
C231
C213
C435
C453
R11 20K
R55
40K
R21
20K
R32
-20K
R43
20K
R54
-40K
R12
-20K
R23
20K
R34
-20K
R45
20K
VIN
VOUT
V4
V3
V2
V1
Rin
20K
G = 1/20K; G/2 = 1/40K; C2 = C231 = C213; C4 = C435; C4/2 = C453
VOUT
VIN
- G (L L C C )s
2
2
4
((L G2
2
G2
4
4
(
s
s
=
+
+
+
+
+
+
+
+
+
4
2
4
2
2
4
5
4
)
)
(
)
(
)
-(L2 C42 L4 C1)
2(L2 C1 C3 L4 C5)-2(C22 L2 L4 C5)
-(L2 G C42 L4)
L2 C1 C3 L4 G)-(C22 L2 L4 G)
2(L2 G C3 L4 C5)
(L2 C1 C3 G2
L2 G2 C3 L4)-(G2 L4 C42
2(G2 L4 C5 C3)-4(G2 L4 C5 C2)
2(L2 C5 G3)-2(G3 L4 C2)
G3 L4 C3)
(
L2 G3 C1)
(
2(G3 L4 C5)-2( L2 C4 G3
G3 C1 L4)
(
L2 C3 G3) s2
(
2(G4 C5)
G
(
+
+
+
+
+
+
+
+
+
+
- L C C G
2 2
(
G2
1 4
(
2L C G2
5
(
) - C
L G
2
s
1 4
2
2
5
1
22
2
3
)
)
)
)
4 C3)-2(G4 C4)
G4 L4)
(
G4 C1)
(
L2 G4)-2(G4 C2) s
(
2 G5
+
+
+
+
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISPPAC81-01PI | In-System Programmable Analog Circuit |
| ISPPAC81-01SI | In-System Programmable Analog Circuit |
| IT100 | P-CHANNEL JFET SWITCH |
| IT136 | Monolithic Dual PNP General Purpose Amplifier |
| IT136-TO71 | Monolithic Dual PNP General Purpose Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISPPAC81-01PI | 功能描述:SPLD - 簡單可編程邏輯器件 PROGRAMMABLE ANALOG CIRCUIT RoHS:否 制造商:Texas Instruments 邏輯系列:TICPAL22V10Z 大電池?cái)?shù)量:10 最大工作頻率:66 MHz 延遲時間:25 ns 工作電源電壓:4.75 V to 5.25 V 電源電流:100 uA 最大工作溫度:+ 75 C 最小工作溫度:0 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:DIP-24 |
| ISPPAC81-01SI | 功能描述:SPLD - 簡單可編程邏輯器件 PROGRAMMABLE ANALOG CIRCUIT RoHS:否 制造商:Texas Instruments 邏輯系列:TICPAL22V10Z 大電池?cái)?shù)量:10 最大工作頻率:66 MHz 延遲時間:25 ns 工作電源電壓:4.75 V to 5.25 V 電源電流:100 uA 最大工作溫度:+ 75 C 最小工作溫度:0 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:DIP-24 |
| ispPAC-CLK5304S-01T48C | 功能描述:時鐘驅(qū)動器及分配 ISP Zero Delay Unv F an-Out Buf-Sngl End RoHS:否 制造商:Micrel 乘法/除法因子:1:4 輸出類型:Differential 最大輸出頻率:4.2 GHz 電源電壓-最大: 電源電壓-最小:5 V 最大工作溫度:+ 85 C 封裝 / 箱體:SOIC-8 封裝:Reel |
| ISPPACCLK5304S-01T48C | 制造商:LATTICE 制造商全稱:Lattice Semiconductor 功能描述:In-System Programmable, Zero-Delay, Universal Fan-Out Buffer, Single-Ended |
| ispPAC-CLK5304S-01T48I | 功能描述:時鐘驅(qū)動器及分配 ISP 0 Delay Unv Fan- Out Buf-Sngl End I RoHS:否 制造商:Micrel 乘法/除法因子:1:4 輸出類型:Differential 最大輸出頻率:4.2 GHz 電源電壓-最大: 電源電壓-最小:5 V 最大工作溫度:+ 85 C 封裝 / 箱體:SOIC-8 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。