Datasheet > LTC1065_09

LTC1065_09

更新时间： 2022-12-28 23:35:34

品牌	Logo	应用领域
凌特 - Linear		时钟
页数	文件大小	规格书
16页	247K
描述
DC Accurate, Clock-Tunable Linear Phase 5th Order Bessel Lowpass Filter

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LTC1065_09 数据手册

LTC1065

DC Accurate, Clock-Tunable

Linear Phase 5th Order Bessel

Lowpass Filter

DESCRIPTIO

FEATURES

The LTC^®1065 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.

■

Clock-Tunable Cutoff Frequency

■

1mV DC Offset (Typical)

■

80dB CMR (Typical)

■

Internal or External Clock

■

50µV_RMSClock Feedthrough

■

100:1 Clock-to-Cutoff Frequency Ratio

■

80µV_RMSTotal Wideband Noise

■

0.004% Noise + THD at 2V_RMSOutput Level

■

50kHz Maximum Cutoff Frequency

Cascadable for Faster Roll-Off

The filter cutoff frequency is controlled either by an inter-

nalorexternalclock. Theclock-to-cutofffrequencyratiois

100 :1. The on-board clock is nearly power supply inde-

pendent and it is programmed via an external RC. The

50µV_RMSclock feedthrough of the device is considerably

lower than other existing monolithic filters.

■

Operates from ±2.375 to ±8V Power Supplies

■

Self-Clocking with 1 RC

■

Available in 8-Pin DIP and 16-Pin SW Packages

APPLICATIO S

The LTC1065 wideband noise is 80µV_RMSand it can

process large AC input signals with low distortion. With

± 7.5V supplies, for instance, the filter handles up to

4V_RMS(94dB S/N ratio) while the standard 1kHz THD is

below 0.005%; 87dB dynamic range (S/N + THD) is ob-

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Audio

■

Strain Gauge Amplifiers

■

Anti-Aliasing Filters

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Low Level Filtering

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Digital Voltmeters

tained with input levels between 2V_RMSand 2.5V_RMS.

■

Smoothing Filters

The LTC1065 is available in 8-pin miniDIP and 16-pin SW

packages. For a Butterworth response, see LTC1063 data

sheet. The LTC1065 is pin compatible with the LTC1063.

■

Reconstruction Filters

, LTC and LT are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners. Protected by U.S. Patents

including 4857860.

TYPICAL APPLICATIO

Frequency Response

3.4kHz Single 5V Supply Bessel Lowpass Filter

–10

–20

–30

–40

–50

–60

–70

–80

–90

4.99k

4.53k

OUT

LTC1065

13k*

1µF

TANT

0.1µF

200pF*

SELF-CLOCKING SCHEME

1065 TA01

100

FREQUENCY (kHz)

1065 TA01b

1065fb

12 3 4 5 6 7...16

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