LT1568

Total Supply Voltage (V+ to V) ........................... 11.6V
Input Voltage on INVA, INVB, GNDA and
GNDB Pins ....................................................... V+ to V
Input Current on INVA, INVB, GNDA and
GNDB Pins (Note 2) ........................................... ±10mA
Output Short-Circuit Duration on OUTA, OUTB, OUTA
and OUTB Pins .............................................. Indefinite
Maximum Continuous Output Current (Note 3)
DC ............................................................... ±100mA
Specified Temperature Range (Note 9)
LT1568C ............................................ 40°C to 85°C
LT1568I ............................................. 40°C to 85°C
Junction Temperature ....................................... 150°C
Storage Temperature Range ...........  65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C


Description

The LT®1568 is an easy-to-use, active-RC filter building block with rail-to-rail inputs and outputs. The internal capacitors of the IC and the GBW product of the internal low noise op amps are trimmed such that consistent and repeatable filter responses can be achieved. With a single resistor value, the LT1568 provides a pair of matched 2-pole Butterworth lowpass filters with unity gain suitable for I/Q channels. 

By using unequal-valued external resistors, the two 2-pole sections can create different frequency responses or gains. In addition, the two stages may be cascaded to create a single 4-pole filter with a programmable response. Capable of cutoff frequencies up to 10MHz, the LT1568 is ideal for antialiasing or channel filtering in high speed data communications systems. The LT1568 can also be used as a bandpass filter. 

The device features very low noise, supporting signal-tonoise ratios of over 90dB. It also provides single-ended to differential signal conversion for directly driving high speed A/D converters. 

The LT1568 has a shutdown mode that reduces supply current to approximately 0.5mA on a 5V supply. It is available in a narrow 16-lead SSOP package.