LTC1564CG#PBF Analog Devices

LTC1564 10kHz to 150kHz Digitally Controlled Antialiasing Filter and 4-Bit P.G.A. FEATURES DESCRIPTIO 4-Bit Digitally Controlled 8th-Order Lowpass Filter The LTC 1564 is a new type of continuous time filter for f Adjustable from 10kHz to 150kHz in 10kHz antialiasing, reconstruction and other band-limiting appli- CUTOFF Steps cations. No other analog components or filter expertise are 100dB Attenuation at 2.5 f needed to use it. There is one analog input pin and one CUTOFF 4-Bit Digitally Controlled Programmable Gain analog output pin. The cutoff frequency (f ) and gain are C Amplifier programmable while the shape of the lowpass response is G = 1 to 16 in 1V/V Steps fixed. A latching digital interface stores f and gain settings C Miniature 16-Pin SSOP Package or it can be bypassed for control directly from the pins. The No External Components LTC1564 operates from 2.7V to 10V total (single or split 122dB Total System Dynamic Range supplies) and comes in a 16-pin surface mount SSOP. Rail-to-Rail Input and Output Range The LTC1564 is a rail-to-rail high resolution 8th-order 2.7V to 10V Operation lowpass filter with two stopband notches, giving approxi- Low Noise Mute Mode mately 100dB attenuation at 2.5 times the passband cutoff Low Power Shutdown Mode frequency f (a de-facto standard for DSP front ends). C Available in 16-Lead Plastic SSOP Package Signals with low or variable levels can be normalized with U the built-in variable gain that reduces input-referred noise APPLICATIO S with increasing gain for a typical dynamic range (maxi- Antialias or Reconstruction Filtering mum signal level to minimum noise) of 122dB (20 equiva- DSP Systems lent bits) with 20kHz f and 118dB at 100kHz f on a 5V C C Communications Systems supply. Scientific Instruments Other frequency-response shapes can be provided upon High Resolutions (16 Bits to 20 Bits) request. Please contact LTC Marketing. Processing Signals Buried in Noise Audio Signal Processing , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Programmable Data Rates Automatic Gain Control (AGC) Single Part Replacing Multiple Filters TYPICAL APPLICATIO LTC1564 Programmable Range Low Noise Programmable Filter with Variable Gain 30 + 20 V 0.1F 10 f = 150kHz C 0 GAIN = 16V/V ANALOG IN 10 GAIN CODE 20 30 16 15 14 13 12 11 10 9 + V AND V SUPPLIES CAN BE FROM + 40 IN AGND V RST G3 G2 G1 G0 1.35V TO 5.25V EACH 50 + LTC1564 TIE F AND G PINS TO V OR V TO 60 SET FREQUENCY AND GAIN CS/ 70 f = 10kHz C DYNAMIC RANGE 118dB TO 122dB OUT V EN HOLD F3 F2 F1 F0 GAIN = 1V/V 80 AT 5V DEPENDING ON FREQUENCY CODE 90 123 4 5 6 7 8 100 0.1F FREQUENCY CODE 110 ANALOG 120 OUT 5 10 100 500 1564 TA01 FREQUENCY (kHz) V 1564 TA02 1564fa 1 GAIN (dB) U ULTC1564 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) + ORDER PART Total Supply Voltage (V to V ) .............................. 11V TOP VIEW + NUMBER Input Voltage ............................. V + 0.3V to V 0.3V OUT 1 16 IN Output Short-Circuit Duration .......................... Indefinite V 2 15 AGND LTC1564CG + Operating Temperature Range EN 3 14 V LTC1564IG CS/HOLD 4 13 RST LTC1564C .............................................. 0C to 70C F3 5 12 G3 LTC1564I.......................................... 40C TO 85C F2 6 11 G2 Storage Temperature Range ................. 65C to 150C F1 7 10 G1 Lead Temperature (Soldering, 10 sec).................. 300C F0 8 9 G0 G PACKAGE 16-LEAD PLASTIC SSOP T = 125C, = 130C/ W JMAX JA Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: