Details, datasheet, quote on part number: LTC1164-6C
PartLTC1164-6C
CategoryAnalog & Mixed-Signal Processing => Filters
DescriptionLow Power 8th Order Pin Selectable Butterworth or Bessel Lowpass Filter
CompanyLinear Technology Corporation
DatasheetDownload LTC1164-6C datasheet
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Features, Applications
LTC1164-5 Low Power 8th Order Pin Selectable Butterworth or Bessel Lowpass Filter DESCRIPTIO

The is a monolithic 8th order filter; it approximates either a Butterworth or a Bessel lowpass response. The LTC1164-5 features clock-tunable cutoff frequency and low power consumption (4.5mA with ± 5V supplies and 2.5mA with single 5V supply). Low power operation is achieved without compromising noise or distortion performance. With ± 5V supplies and 10kHz cutoff frequency, the operating signal-to-noise ratio is 86dB and the THD throughout the passband is 0.015%. Under the same conditions, a 77dB signal-tonoise ratio and distortion is obtained with a single 5V supply while the clock feedthrough is kept below the noise level. The maximum signal-to-noise ratio is 92dB. The LTC1164-5 approximates an 8th order Butterworth response with a clock-to-cutoff frequency ratio of 100:1 (Pin or 50:1 double-sampled (Pin V + and Pin 1 shorted to Pin 13). Double-sampling allows the input signal frequency to reach the clock frequency before any aliasing occurrence. An 8th order Bessel response can also be approximated with a clock-to-cutoff frequency ratio of 140:1 (Pin 10 to ground). With ± 7.5V supply, ± 5V supply and single 5V supply, the maximum clock frequency of the 1.5MHz, 1MHz, and 1MHz respectively. The LTC1164-5 is pin-compatible with the LTC1064-2 and LTC-1064-3.

FEATURES

Pin Selectable Butterworth or Bessel Response 4mA Supply Current with ± 5V Supplies fCUTOFF 20kHz 100µVRMS Wideband Noise THD ± 7.5V, VIN = 2VRMS) Operates with a Single 5V Supply (1VRMS Input Range) 60µVRMS Clock Feedthrough (Single 5V Supply) Operates ± 8V Supplies TTL/CMOS-Compatible Clock Input No External Components

Anti-Aliasing Filters Battery-Operated Instruments Telecommunications Filters Smoothing Filters

WIDEBAND NOISE = 110µVRMS THD IN PASSBAND 0.02% AT VIN = 2VRMS NOTE: THE CONNECTION FROM PIN 7 TO PIN 14 SHOULD BE MADE UNDER THE PACKAGE. FOR 50:1 OPERATION CONNECT PIN 1 TO PIN 13 AS SHOWN. FOR OR 150:1 OPERATION PINS 1 AND 13 SHOULD FLOAT. THE POWER SUPPLIES SHOULD BE BYPASSED A 0.1µF CAPACITOR AS CLOSE TO THE PACKAGE AS POSSIBLE.

Total Supply Voltage V 16V Input Voltage (Note ­ 0.3V) Output Short Circuit Duration......................... Indefinite Power Dissipation............................................. 400mW Burn-In Voltage...................................................... 16V

= 10k, fCLK TA = Operating Temperature Range, unless otherwise specified.

PARAMETER Passband Gain at 0.25fCUTOFF (Note 3) Gain at 0.50fCUTOFF (Note 3) Gain at 0.90fCUTOFF (Note 3) Gain at 0.95fCUTOFF (Note 3) Gain at fCUTOFF (Note 3) Gain at 1.44fCUTOFF (Note 3) Gain at 2.0fCUTOFF (Note 3) Gain with fCLK = 20kHz (Note 3) Gain with = 2.375V (Note 3) Input Frequency Range CONDITIONS fIN = 1kHz, (fCLK/fC) = 100:1 fIN = 1kHz, (fCLK/fC) = 50:1 fIN = 2kHz, (fCLK/fC) = 100:1 fIN = 4kHz, (fCLK/fC) = 50:1 fIN = 3.6kHz, (fCLK/fC) = 100:1 fIN = 3.8kHz, (fCLK/fC) = 100:1 fIN = 4kHz, (fCLK/fC) = 100:1 fIN = 8kHz, (fCLK/fC) = 50:1 fIN = 5.76kHz, (fCLK/fC) = 100:1 fIN = 8kHz, (fCLK/fC) = 100:1 fIN = 200Hz, (fCLK/fC) = 100:1 fIN = 400kHz, fIN = 2kHz, (fCLK/fC) = 100:1 fIN = 400kHz, fIN = 4kHz, (fCLK/fC) = 100:1 (fCLK/fC) = 100:1 (fCLK/fC) = 50:1

Operating Temperature Range to 125°C Storage Temperature Range................ to 150°C Lead Temperature (Soldering, 10 sec)................. 300°C

TOP VIEW 50:1 MODE 1 VIN 2 GND V+ 4 GND LP6 7 CONNECT 8 S PACKAGE 16-LEAD PLASTIC SW TJMAX 85°C/W 16 CONNECT 15 50:1 MODE NC 12 CLK 11 BUTT/BESS NC 9 VOUT

= 10k, fCLK TA = Operating Temperature Range, unless otherwise specified.

PARAMETER Maximum fCLK CONDITIONS VS = Single 5V (GND = 2V) Input at GND, f = fCLK, Square Wave ± 5V, (fCLK/fC) ± 5V, (fCLK/fC) = 50:1 Input at GND, f < fCLK ± 5V, (fCLK/fC) ± 5V, (fCLK/fC) ± 5V, (fCLK/fC) ± 5V, (fCLK/fC) TA 25°C

Output DC Offset Output DC Offset TempCo Power Supply Current

Power Supply Range The q denotes specifications which apply over the full operating temperature range. Note 1: Absolute Maximum Ratings are those values beyond which life of the device may be impaired.

Note 2: Connecting any pin to voltages greater than + or less than V ­ may cause latchup. It is recommended that no sources operating from external supplies be applied prior to power-up of the LTC1164-5. Note 3: All gains are measured relative to passband gain. The filter cutoff frequency is abbreviated as fCUTOFF or fC.

C A. fCLK = 100kHz fCUTOFF 1kHz (100:1, PIN V B. fCLK = 375kHz fCUTOFF 2.68kHz (140:1, PIN 10 GND) C. fCLK = 500kHz fCUTOFF 10kHz (50:1, PIN TO V PINS 1-13 SHORTED)


 

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