Datasheet > LT1066-1CS

LT1066-1CS

更新时间： 2024-11-08 23:48:19

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
16页	410K
描述
Analog Filter

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LT1066-1CS 数据手册

LTC1066-1

14-Bit DC Accurate

Clock-Tunable, 8th Order Elliptic

or Linear Phase Lowpass Filter

DESCRIPTIO

EATURE

■

DC Gain Linearity: 14 Bits

The LTC1066-1 is an 8th order elliptic lowpass filter which

simultaneously provides clock-tunability and DC accu-

racy. The unique and proprietary architecture of the filter

allows 14 bits of DC gain linearity and a maximum of

1.5mV DC offset. An external RC is required for DC

accurate operation. With ±7.5V supplies, a 20k resistor

and a 1µF capacitor, the cutoff frequency can be tuned

from 800Hz to 100kHz. A clock-tunable 10Hz to 100kHz

operation can also be achieved (see Typical Application

Maximum DC Offset: ±1.5mV

DC Offset TempCo: 7µV/°C

Device Fully Tested at f_CUTOFF= 80kHz

Maximum Cutoff Frequency: 120kHz (V_S= ±8V)

Drives 1kΩ Load with 0.02% THD or Better

Signal-to-Noise Ratio: 90dB

Input Impedance: 500MΩ

Selectable Elliptic or Linear Phase Response

Operates from Single 5V up to ±8V Power Supplies

section).

The filter does not require any external active components

such as input/output buffers. The input/output impedance

is 500MΩ/0.1Ω and the output of the filter can source or

sink 40mA. When pin 8 is connected to V⁺, the clock-to-

cutoff frequency ratio is 50:1 and the input signal is

sampled twice per clock cycle to lower the risk of aliasing.

For frequencies up to 0.75f_CUTOFF, the passband ripple is

±0.15dB. The gain at f_CUTOFFis –1dB and the filter’s

stopband attenuation is 80dB at 2.3f_CUTOFF. Linear phase

operationisalsoavailablewithaclock-to-cutofffrequency

ratio of 100:1 when pin 8 is connected to ground.

O U

PPLICATI

Instrumentation

■

Data Acquisition Systems

Anti-Aliasing Filters

Smoothing Filters

Audio Signal Processing

The LTC1066-1 is available in an 18-pin SOL package.

TYPICAL APPLICATI

Amplitude Response

Clock-Tunable, DC Accurate, 800Hz to 80kHz Elliptic Lowpass Filter

20k

1µF

OUT A

–IN A

+IN A

7.5V

–10

–20

–30

–40

–50

–60

–70

–80

–90

= 80kHz

OUT B

+IN B

GND

;

OUT

OS(OUT)

2.5mV

MAX

= 800Hz

–

–7.5V

7.5V

LTC1066-1

FILTER

SHORT CONNECTION UNDER

IC AND SHIELDED BY A

30k

CONNECT 1

COMP 2

GROUND PLANE

FILTER

OUT

CONNECT 2

COMP 1

15pF

BYPASS THE POWER SUPPLIES

WITH 0.1µF DISC CERAMIC

50/100

CLK

–

40kHz ≤ f

≤ 4MHz

–7.5V

CLK

100

10k

FREQUENCY (Hz)

100k

1066-1 TA01

1066-1 TA02

12 3 4 5 6 7...16

中文翻译

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