650kHz Continuous Time/ Linear Phase Lowpass Filter
FEATURES
n 7th Order, 650kHz Linear Phase Filter in an SO-8 n Differential Inputs and Outputs n Operates on a Single 5V ...
Description
FEATURES
n 7th Order, 650kHz Linear Phase Filter in an SO-8 n Differential Inputs and Outputs n Operates on a Single 5V or a ±5V Supply n Low Offset: 5mV Typical n 75dB THD and SNR n 78dB SNR n Shutdown Mode n Requires No External Components n Requires No External Clock Signal
APPLICATIONS
n CDMA Basestations n Data Communications n Antialiasing Filters n Smoothing or Reconstruction Filters n Matched Filter Pairs n Replacement for LC Filters
TYPICAL APPLICATION
Single 5V Supply, Differential 650kHz Lowpass Filter
VIN+ VIN–
0.1μF
1 +IN 2
–IN
+OUT 8 7
–OUT
LTC1565-31
3 GND
V+ 6
4 V–
SHDN 5
VOUT+ VOUT–
5V
5V 0.1μF
15645-31 TA01
LTC1565-31
650kHz Continuous Time, Linear Phase Lowpass Filter
DESCRIPTION
The LTC®1565-31 is a 7th order, continuous time, linear phase lowpass filter. The selectivity of the LTC1565-31, combined with its linear phase and dynamic range, make it suitable for filtering in data communications or data acquisition systems. The filter attenuation is 36dB at 2× fCUTOFF and at least 72dB for frequencies above 3× fCUTOFF. Unlike comparable LC filters, the LTC1565-31 achieves this selectivity with a linear phase response in the passband.
With 5% accuracy of the cutoff frequency, the LTC1565-31 can be used in applications requiring pairs of matched filters, such as transceiver I and Q channels. Furthermore, the differential inputs and outputs provide a simple interface for these wireless systems.
With a single 5V supply and a 2VP-P input, the LTC1565-31 fe...
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