LTC1067CGN

更新时间： 2024-01-25 07:13:27

品牌	Logo	应用领域
凌特 - Linear		有源滤波器过滤器光电二极管 LTE
页数	文件大小	规格书
20页	480K
描述
Rail-to-Rail, Very Low Noise Universal Dual Filter Building Block

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LTC1067CGN 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	包装说明：	SOP,
针数：	16	Reach Compliance Code：	compliant
风险等级：	5.58	有源滤波器类型：	SWITCHED CAPACITOR FILTER
中心频率或截止频率最大范围：	20 kHz	中心频率或截止频率最小范围：	0.001 kHz
JESD-30 代码：	R-PDSO-G16	JESD-609代码：	e3
长度：	9.906 mm	湿度敏感等级：	1
功能数量：	2	端子数量：	16
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	260	极和零点：	2 AND 0
认证状态：	Not Qualified	响应：	UNIVERSAL
座面最大高度：	1.752 mm	最大供电电压 (Vsup)：	11 V
最小供电电压 (Vsup)：	3 V	标称供电电压 (Vsup)：	4.75 V
表面贴装：	YES	技术：	CMOS
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	30
传递特性：	RESISTOR PROGRAMMABLE	宽度：	3.899 mm
Base Number Matches：	1

LTC1067CGN 数据手册

LTC1067/LTC1067-50

ODES OF OPERATIO

Linear Technology’s universal switched-capacitor filters

are designed with a fixed internal, nominal f_CLK/f_Oratio.

The LTC1067 has a 100:1 f_CLK/f_Oratio and the

LTC1067-50 has a 50:1 f_CLK/f_Oratio. Filter designs often

requirethef_CLK/f_Oratioofeachsectiontobedifferentfrom

the nominal ratio and in most cases different from each

other. Ratios other than the nominal value are possible

with external resistors. Operating modes use external

resistors, connected in different arrangements to realize

different f_CLK/f_Oratios. By choosing the proper mode, the

Mode 1

In Mode 1, the ratio of the external clock frequency to the

center frequency of each 2nd order section is internally

fixed at the part’s nominal ratio. Figure 3 illustrates Mode

1 providing 2nd order notch, lowpass and bandpass

outputs. Mode 1 can be used to make high order Butter-

worth lowpass filters; it can also be used to make low Q

notches and for cascading 2nd order bandpass functions

tuned at the same center frequency. Mode 1 is faster than

Mode 3.

_CLK/f_Oratio canbeincreasedordecreasedfromthe part’s

Please refer to the Operating Limits paragraph under Appli-

cations Information for a guide to the use of capacitor C_C.

nominal ratio.

The choice of operating mode also effects the transfer

function at the HP/N pins. The LP and BP pins always give

thelowpassandbandpasstransferfunctionsrespectively,

regardless of the mode utilized. The HP/N pins have a

different transfer function depending on the mode used.

Mode 1 yields a notch transfer function. Mode 3 yields a

highpass transfer function. Mode 2 yields a highpass-

notch transfer function (i.e., a highpass with a stopband

notch). More complex transfer functions, such as low-

pass-notch, allpass or complex zeros, are achieved by

summing two or more of the LP, BP or HP/N outputs. This

is illustrated in sections Mode 2n and Mode 3a.

–

∫

1067 F03

CLK

; f = f

n O

RATIO

= H

AGND

Q = ; H = – ; H

= –

OBP

OLP

NOTE: RATIO = 100 FOR LTC1067

= 50 FOR LTC1067-50

Choosing the proper mode(s) for a particular application

is not trivial and involves much more than just adjusting

the f_CLK/f_Oratio. Listed here are six of the nearly twenty

modes available. To make the design process simpler and

quicker, Linear Technology has developed the FilterCAD^TM

for Windows^®design software. FilterCAD is an easy-to-

use, powerful and interactive filter design program. The

designer can enter a few filter specifications and the

program produces a full schematic. FilterCAD allows the

designer to concentrate on the filter’s transfer function

and not get bogged down in the details of the design.

Alternatively, those who have experience with the Linear

Technology family of parts can control all of the details

themselves. For a complete listing of all the operating

modes, consult the appendices of the FilterCAD manual or

the Help files in FilterCAD. FilterCAD can be obtained free

of charge on the Linear Technology web site (http://

www.linear-tech.com) or you can order the FilterCAD

CD-ROM by contacting Linear Technology’s marketing

department.

Figure 3. Mode 1, 2nd Order Filter Providing Notch,

Bandpass and Lowpass Outputs

Mode 1b

Mode 1b is derived from Mode 1. In Mode 1b (Figure 4)

two additional resistors R5 and R6 are added to lower the

amount of voltage fed back from the lowpass output into

the input of the SA (or SB) switched-capacitor summer.

This allows the filter’s clock-to-center frequency ratio to

be adjusted beyond the part’s nominal ratio. Mode 1b

maintains the speed advantages of Mode 1 and should be

consideredanoptimummodeforhighQdesignswithf_CLK

to f_CUTOFF(or f_CENTER) ratios greater than the part’s

nominal ratio.

FilterCAD is a trademark of Linear Technology Corporation.

Windows is a registered trademark of Microsoft Corporation.

1...6 7 8910 11 12...20

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与LTC1067CGN相关器件

型号	品牌	获取价格	描述	数据表
LTC1067CGN#PBF	Linear	获取价格	LTC1067 - Rail-to-Rail, Very Low Noise Universal Dual Filter Building Block; Package: SSOP
LTC1067CGN#TR	Linear	获取价格	LTC1067 - Rail-to-Rail, Very Low Noise Universal Dual Filter Building Block; Package: SSOP
LTC1067CGN#TRPBF	Linear	获取价格	暂无描述
LTC1067CS	Linear	获取价格	Rail-to-Rail, Very Low Noise Universal Dual Filter Building Block
LTC1067CS#PBF	Linear	获取价格	LTC1067 - Rail-to-Rail, Very Low Noise Universal Dual Filter Building Block; Package: SO;
LTC1067CS#TR	Linear	获取价格	LTC1067 - Rail-to-Rail, Very Low Noise Universal Dual Filter Building Block; Package: SO;
LTC1067CS#TRPBF	Linear	获取价格	LTC1067 - Rail-to-Rail, Very Low Noise Universal Dual Filter Building Block; Package: SO;
LTC1067I	Linear	获取价格	Rail-to-Rail, Very Low Noise Universal Dual Filter Building Block
LTC1067IGN	Linear	获取价格	Rail-to-Rail, Very Low Noise Universal Dual Filter Building Block
LTC1067IGN#PBF	Linear	获取价格	LTC1067 - Rail-to-Rail, Very Low Noise Universal Dual Filter Building Block; Package: SSOP

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