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LTC1064AMJ PDF预览

LTC1064AMJ

更新时间： 2024-01-08 18:19:03
品牌 Logo 应用领域
凌特 - Linear 有源滤波器过滤器LTE
页数 文件大小 规格书
16页 389K
描述
Low Noise, Fast, Quad Universal Filter Building Block

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LTC1064AMJ 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：SOIC包装说明：PLASTIC, SOL-24
针数：24Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.66有源滤波器类型：SWITCHED CAPACITOR FILTER
中心频率或截止频率最大范围：100 kHz中心频率或截止频率最小范围：0.0001 kHz
JESD-30 代码：R-PDSO-G24JESD-609代码：e0
长度：15.4 mm标称负供电电压 (Vsup)：-8 V
功能数量：4端子数量：24
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
极和零点：2 AND 0认证状态：Not Qualified
响应：UNIVERSAL座面最大高度：2.65 mm
标称供电电压 (Vsup)：8 V表面贴装：YES
技术：CMOS端子面层：Tin/Lead (Sn/Pb)
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUAL宽度：7.5 mm
Base Number Matches：1

LTC1064AMJ 数据手册

 浏览型号LTC1064AMJ的Datasheet PDF文件第6页浏览型号LTC1064AMJ的Datasheet PDF文件第7页浏览型号LTC1064AMJ的Datasheet PDF文件第8页浏览型号LTC1064AMJ的Datasheet PDF文件第10页浏览型号LTC1064AMJ的Datasheet PDF文件第11页浏览型号LTC1064AMJ的Datasheet PDF文件第12页 
LTC1064  
W
U
ODES OF OPERATIO  
Mode 3  
SECONDARY MODES  
Mode 1b  
Mode3isthesecondoftheprimarymodes. InMode3, the  
ratio of the external clock frequency to the center fre-  
quencyofeach2ndordersectioncanbeadjustedabove or  
below 50:1 or 100:1. Side D of the LTC1064 can only be  
connected in Mode 3. Figure 6 illustrates Mode 3, the  
classical state variable configuration, providing highpass,  
bandpass and lowpass 2nd order filter functions. Mode 3  
is slower than Mode 1. Mode 3 can be used to make high  
order all-pole bandpass, lowpass, highpass and notch  
filters.  
Mode1bisderivedfromMode1.InMode1b,Figure7,two  
additional resistors R5 and R6 are added to alternate the  
amount of voltage fed back from the lowpass output into  
the input of the SA (or SB or SC) switched-capacitor  
summer. This allows the filter’s clock-to-center frequency  
ratio to be adjusted beyond 50:1 or 100:1. Mode 1b  
maintains the speed advantages of Mode 1.  
R6  
R5  
When the internal clock-to-center frequency ratio is set at  
50:1, the design equations for Q and bandpass gain are  
different from the 100:1 case. This was done to provide  
speed without penalizing the noise performance.  
R3  
R2  
BP  
LP  
N
S
R1  
V
IN  
–
+
–
+
Σ
∫
∫
C
C
1064 F07  
1/4 LTC1064  
R4  
R3  
R2  
AGND  
BP  
LP  
HP  
S
R3  
f
R6  
R6  
R5 + R6  
CLK  
f
O
=
; f= f Q =  
;
n
O;  
√
√
R2  
100(50) R5 + R6  
R1  
V
IN  
–
+
R2  
R1  
R6  
R5 + R6  
–
+
R2  
R1  
f
CLK  
2
H
(f→ 0) = H  
f→  
= –  
; H  
OLP  
= –  
;
Σ
ON1  
OBP  
ON2  
(
)
∫
∫
1064 F06  
1/4 LTC1064  
R3  
H
= –  
; R5 R6 ≤ 5k  
1064 F07 Eq  
R1  
AGND  
Figure 7. Mode 1b: 2nd Order Filter Providing Notch,  
Bandpass and Lowpass  
R2  
R4  
R3 R2  
R2  
R1  
f
CLK  
MODE 3 (100:1):  
MODE 3 (50:1):  
f
=
; Q =  
; H = –  
OHP  
;
O
√
√
R1  
R2 R4  
100  
R3  
R1  
R4  
H
= –  
; H  
= –  
OLP  
OBP  
Mode 2  
R2  
R4  
1.005  
f
R2  
R4  
√
CLK  
50  
f
=
; Q =  
;
O
Mode 2 is a combination of Mode 1 and Mode 3, as shown  
in Figure 8. With Mode 2, the clock-to-center frequency  
ratio fCLK/fO is always less than 50:1 or 100:1. The  
advantage of Mode 2 is that it provides less sensitivity to  
resistor tolerances than does Mode 3. As in Mode 1, Mode  
2 has a notch output which depends on the clock fre-  
quency and the notch frequency is therefore less than the  
center frequency fO.  
√
R2  
R2  
–
R3 16R4  
R3  
R1  
R3  
R2  
R1  
R4  
R1  
H
= –  
; H  
= –  
OBP  
; H = –  
OLP  
OHP  
1 –  
16R4  
NOTE: THE 50:1 EQUATIONS FOR MODE 3 ARE DIFFERENT FROM THE EQUATIONS  
FOR MODE 3 OPERATIONS OF THE LTC1059, LTC1060 AND LTC1061. START WITH  
f , CALCULATE R2/R4, SET R4; FROM THE Q VALUE, CALCULATE R3:  
O
R2  
R3 =  
; THEN CALCULATE R1 TO SET  
THE DESIRED GAIN.  
1.005  
Q
R2  
R4  
R2  
16R4  
1064 F06 Eq  
+
√
When the internal clock-to-center frequency ratio is set at  
50:1, the design equations for Q and bandpass gain are  
different from the 100:1 case.  
Figure 6. Mode 3: 2nd Order Filter Providing Highpass,  
Bandpass and Lowpass  
9
1...6789101112...16

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