Part | LTC1562IG |

Category | Analog & Mixed-Signal Processing => Filters => Universal Filters |

Description | LTC1562, 8th Order, 150kHz, Very Low Noise, Low Distortion Active RC Quad Universal Filter |

Company | Linear Technology Corporation |

Datasheet | Download LTC1562IG datasheet |

Quote | |

Features, Applications |

LTC1562 Very Low Noise, Low Distortion Active RC Quad Universal Filter FEATURES Continuous Time--No Clock Four 2nd Order Filter Sections, to 150kHz Center Frequency ± 0.5% Typical Center Frequency Accuracy ± 0.3% Typical Center Frequency Accuracy (A Grade) Wide Variety of Response Shapes Lowpass, Bandpass and Highpass Responses 103dB Typical S/N, ± 5V Supply 1) 97dB Typical S/N, Single 5V Supply 1) 96dB Typical S/(N + THD) ± 5V Supply, 20kHz Input Rail-to-Rail Input and Output Voltages DC Accurate to 3mV (Typ) "Zero-Power" Shutdown Mode Single or Dual Supply, to 10V Total Resistor-Programmable fO, Q, Gain The is a low noise, low distortion continuous-time filter with rail-to-rail inputs and outputs, optimized for a center frequency (fO) to 150kHz. Unlike most monolithic filters, no clock is needed. Four independent 2nd order filter blocks can be cascaded in any combination, such as one 8th order or two 4th order filters. Each block's response is programmed with three external resistors for center frequency, Q and gain, using simple design formulas. Each 2nd order block provides lowpass and bandpass outputs. Highpass response is available if an external capacitor replaces one of the resistors. Allpass, notch and elliptic responses can also be realized. The LTC1562 is designed for applications where dynamic range is important. For example, by cascading 2nd order sections in pairs, the user can configure the as a dual 4th order Butterworth lowpass filter with 94dB signal-to-noise ratio from a single 5V power supply. Low level signals can exploit the built-in gain capability of the LTC1562. Varying the gain of a section can achieve a dynamic range as high as 118dB with ± 5V supply. Other cutoff frequency ranges can be provided upon request. Please contact LTC Marketing. High Resolution Systems (14 Bits to 18 Bits) Antialiasing/Reconstruction Filters Data Communications, Equalizers Dual or I-and-Q Channels (Two Matched 4th Order Filters in One Package) Linear Phase Filtering Replacing LC Filter Modules SCHEMATIC INCLUDES PIN NUMBERS FOR 20-PIN PACKAGE. PINS (NOT SHOWN) ALSO CONNECT V SEE TYPICAL APPLICATIONS FOR OTHER CUTOFF FREQUENCIES DC ACCURATE, NONINVERTING, UNITY-GAIN, RAIL-TO-RAIL INPUT AND OUTPUTS. PEAK SNR 100dB WITH ± 5V SUPPLIES Total Supply Voltage V 11V Maximum Input Voltage at Any Pin....................(V + 0.3V) Storage Temperature Range................. to 150°C Operating Temperature Range to 85°C Lead Temperature (Soldering, 10 sec).................. 300°CG PACKAGE 20-LEAD PLASTIC SSOP *G PACKAGE PINS ARE SUBSTRATE/SHIELD CONNECTIONS AND MUST BE TIED V Consult LTC Marketing for parts specified with wider operating temperature ranges.SYMBOL VS IS PARAMETER Total Supply Voltage Supply Current The q denotes the specifications that apply over the full operating temperature range, otherwise specifications are ± 5V, outputs unloaded, SHDN pin to logic "low", unless otherwise noted. AC specs are for a single 2nd order section, RIN = 100kHz, unless noted. CONDITIONS = 30pF, Outputs = 30pF, Outputs = 30pF, Outputs = 30pF, Outputs at 0V Output Voltage Swing ± 2.375V, Input at AGND Voltage ± 5V, Input at AGND Voltage VS = Single 5V Supply 5V, V2 Output Has 5V, V2 Output Has 5V, V2 Output Has ± 2.375V, fIN 10kHz, V2 Output Has ± 2.375V, fIN = fO, V2 Output Has = 30pF DC Offset Magnitude, V2 Outputs (Lowpass Response) DC AGND Reference Point Center Frequency (f O) Error (Note 2) LTC1562 (SSOP) LTC1562A (SSOP) LTC1562 (PDIP) LP Passband Gain (V2 Output) BP Passband Gain (V1 Output)SYMBOL PARAMETER Q Error Wideband Output Noise, Lowpass Response (V2 Output) Input-Referred Noise, Gain = 100 THD Total Harmonic Distortion, Lowpass Response (V2 Output) The q denotes the specifications that apply over the full operating temperature range, otherwise specifications are ± 5V, outputs unloaded, SHDN pin to logic "low", unless otherwise noted. AC specs are for a single 2nd order section, RIN = 100kHz, unless noted. CONDITIONS 2.375V, LP Output Has = 200kHz, Input AC GND = 200kHz, Input AC GND = 1, Input AC GND fIN 2.8VP-P, V1 and V2 Outputs Have = 30pF fIN 2.8VP-P, V1 and V2 Outputs Have = 30pF Shutdown Supply Current Shutdown-Input Logic Threshold Shutdown-Input Bias Current Shutdown Delay Shutdown Recovery Delay Inverting Input Bias Current, Each Biquad Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. SHDN Pin to 0V SHDN Pin Steps from V + SHDN Pin Steps from to 0V SHDN Pin V + SHDN Pin ± 2.375V MIN TYP Note 2: fO change from ± 2.375 supplies 0.15% typical, fO temperature coefficient, is 25ppm/°C typical. 20 15 MAX UNITS % µVRMS µs pA |

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