LTC1264-7 linear Phase, Group Delay Equalized, 8th Order Lowpass Filter

The LTC1264-7 is a clock-tunable monolithic 8th order lowpass filter with linear passband phase and flat group delay. The amplitude response approximates a maximally flat passband and exhibits steeper roll-off than an equivalent 8th order Bessel filter. For instance, at twice the cutoff frequency, the filter attains 28dB attenuation (vs 12dB for Bessel), while at three times the cutoff frequency, the filter attains 55dB attenuation (vs 30dB for Bessel).

The cutoff frequency of the LTC1264-7 is tuned via an external TTL or CMOS clock. The clock-to-cutoff frequency ratio of the LTC1264-7 can be set to 25:1 (pin 10 to V+) or 50:1 (pin 10 to V–). When the filter operates at clock-to-cutoff frequency ratio of 25:1, the input is double-sampled to lower the risk of aliasing.

The LTC1264-7 is optimized for speed. Depending on the operating conditions, cutoff frequencies between 200kHz and 250kHz can be obtained. (Please refer to the Passband vs Clock Frequency graphs.)

The LTC1264-7 is pin-compatible with the LTC1064-X series

产品特点 Features

Steeper Roll-Off Than Bessel Filters
High Speed: fC </= 200kHz
Phase Equalized Filter in a 14-Pin Package
Phase and Group Delay Response Fully Tested
Transient Response Exhibits 5% Overshoot and No Ringing
65dB THD or Better Throughout a 100kHz Passband
No External Components Needed
Available in Plastic 14-Pin DIP and 16-Pin SO Wide Packages

参数

应用

Data Communication Filters
Time Delay Networks
Phase Matched Filters

典型应用图

LTC1264-7 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC1264-7CN	PDIP	14	C	$16.65	$13.70
LTC1264-7CN#PBF	PDIP	14	C	$16.65	$13.70
LTC1264-7CSW	SO	16	C	$20.85	$16.90
LTC1264-7CSW#PBF	SO	16	C	$20.85	$16.90
LTC1264-7CSW#TR	SO	16	C		$16.96
LTC1264-7CSW#TRPBF	SO	16	C		$16.96
LTC1264CN	PDIP	24	C	$11.70	$9.45
LTC1264CN#PBF	PDIP	24	C	$11.70	$9.45
LTC1264CSW	SO	24	C	$13.70	$10.80
LTC1264CSW#PBF	SO	24	C	$13.70	$10.80
LTC1264CSW#TR	SO	24	C		$10.90
LTC1264CSW#TRPBF	SO	24	C		$10.90

LTC1264-7 数据手册及相关资料下载

数据手册(英文) : LTC1264-7 - linear Phase, Group Delay Equalized, 8th Order Lowpass Filter.PDF
应用指南 (英文) : AN56 - Better than Bessel linear Phase Filters For Data Communications.PDF
可靠性数据 : R042 Reliability Data.PDF