LTC1065 DC Accurate, Clock-Tunable linear Phase 5th Order Bessel Lowpass Filter

The LTC1065 is the first monolithic filter providing both clock-tunability with low DC output offset and over 12-bit DC accuracy. The frequency response of the LTC1065 closely approximates a 5th order Bessel polynomial. With appropriate PCB layout techniques the output DC offset is typically 1mV and is constant over a wide range of clock frequencies. With ±5V supplies and ±4V input voltage range, the CMR of the device is typically 80dB.

The filter cutoff frequency is controlled either by an internal or external clock. The clock-to-cutoff frequency ratio is 100:1. The on-board clock is nearly power supply independent and it is programmed via an external RC. The 50µVRMS clock feedthrough of the device is considerably lower than other existing monolithic filters.

The LTC1065 wideband noise is 80µVRMS and it can process large AC input signals with low distortion. With ±7.5V supplies, for instance, the filter handles up to 4VRMS (94dB S/N ratio) while the standard 1kHz THD is below 0.005%; 87dB dynamic range (S/N THD) is obtained with input levels between 2VRMS and 2.5VRMS.

The LTC1065 is available in 8-pin miniDIP and 16-pin SOL. For a Butterworth response, see LTC1063 data sheet. The LTC1065 is pin compatible with the LTC1063

产品特点 Features

Clock-Tunable Cutoff Frequency
1mV DC Offset (Typical)
80dB CMR (Typical)
Internal or External Clock
50µVRMS Clock Feedthrough
100:1 Clock-to-Cutoff Frequency Ratio
80µVRMS Total Wideband Noise
0.004% Noise THD at 2VRMS Output Level
50kHz Maximum Cutoff Frequency
Cascadable for Faster Roll-Off
Operates from ±2.375 to µ8V Power Supplies
Self-Clocking with 1 RC

参数

应用

Strain Gauge Amplifiers
Anti-Aliasing Filters
Low Level Filtering
Digital Voltmeters
Smoothing Filters
Reconstruction Filters

典型应用图

LTC1065 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) *
LTC1065CN8	PDIP	8	C	$6.70	$5.50
LTC1065CN8#PBF	PDIP	8	C	$6.70	$5.50
LTC1065CSW	SO	16	C	$7.15	$5.90
LTC1065CSW#PBF	SO	16	C	$7.15	$5.90
LTC1065CSW#TR	SO	16	C		$5.96
LTC1065CSW#TRPBF	SO	16	C		$5.96
LTC1065IN8	PDIP	8	I	$7.35	$6.05
LTC1065IN8#PBF	PDIP	8	I	$7.35	$6.05
LTC1065ISW	SO	16	I	$7.90	$6.50
LTC1065ISW#PBF	SO	16	I	$7.90	$6.50
LTC1065ISW#TR	SO	16	I		$6.56
LTC1065ISW#TRPBF	SO	16	I		$6.56

LTC1065 数据手册及相关资料下载

数据手册(英文) : LTC1065 - DC Accurate, Clock-Tunable linear Phase 5th Order Bessel Lowpass Filter.PDF
设计要点 (英文) : DN84 - Source Resistance Induced Distortion in Op Amps.PDF
可靠性数据 : R042 Reliability Data.PDF