LTC1264-7CN#TR

更新时间： 2024-02-13 23:41:20

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
16页	295K
描述
IC SWITCHED CAPACITOR FILTER, BESSEL, LOWPASS, PDIP14, 0.300 INCH, PLASTIC, DIP-14, Active Filter

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技术参数
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LTC1264-7CN#TR 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, SO-14
针数：	14	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.68	有源滤波器类型：	SWITCHED CAPACITOR FILTER
中心频率或截止频率最大范围：	250 kHz	中心频率或截止频率最小范围：
JESD-30 代码：	R-PDSO-G14	JESD-609代码：	e0
长度：	8.65 mm	功能数量：	1
端子数量：	14	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：	8 AND 0
认证状态：	Not Qualified	响应：	LOWPASS
座面最大高度：	1.75 mm	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	传递特性：	BESSEL
宽度：	3.9 mm	Base Number Matches：	1

LTC1264-7CN#TR 数据手册

LTC1264-7

O U

W U

PPLICATI

S I FOR ATIO

Clock Feedthrough

clock feedthrough, if bothersome, can be greatly reduced

by adding a simple R/C lowpass network at the output of

the filter pin (9). This R/C will completely eliminate any

switching transients.

ClockfeedthroughisdefinedastheRMSvalueoftheclock

frequency and its harmonics that are present at the filter’s

output pin (9). The clock feedthrough is tested with the

input pin (2) grounded and it depends on PC board layout

and on the value of the power supplies. With proper layout

techniques the values of the clock feedthrough are shown

in Table 8.

Wideband Noise

The wideband noise of the filter is the total RMS value of

the device’s noise spectral density and it is used to

determine the operating signal-to-noise ratio. Most of its

frequency contents lie within the filter passband and it

cannot be reduced with post filtering. For instance, the

Table 8. Clock Feedthrough

25:1

50:1

LTC1264-7 wideband noise at ±5V supply is 160µV_RMS

Single 5V

±5V

±7.5V

100µV

120µV

100µV

400µV

RMS

1000µV

145µV_RMSof which have frequency contents from DC up

to the filter’s cutoff frequency. The total wideband noise

(µV_RMS) is nearly independent of the value of the clock.

The clock feedthrough specifications are not part of the

wideband noise.

RMS

Note: The clock feedthrough at 25:1 is imbedded in the wideband

noise of the filter. Clock waveform is a square wave.

Any parasitic switching transients during the rise and fall

edges of the incoming clock are not part of the clock

feedthroughspecifications. Switchingtransientshavefre-

quency contents much higher than the applied clock; their

amplitude strongly depends on scope probing techniques

as well as grounding and power supply bypassing. The

Speed Limitations

To avoid op amp slew rate limiting at maximum clock

frequencies, the signal amplitude should be kept below a

specified level as shown in Table 9.

12647fa

1...9 10 111213 14 15 16

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