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AS “АLFA RPAR” Joint Stock Company ALFA Riga, Latvia www.alfarzpp.lv; alfa@alfarzpp.lv 2018 v.6 AS3320 AS3320 - Voltage controlled filter (VCF) FEATURES APPLICATIONS  voltage controllable frequency - 12 octave range  voltage controllable resonance - from zero to oscillation  accurate exponential frequency scale  accurate linear resonance scale  low control voltage feedthrough -45dB typical  filter configurable into LPF, HPF, all pass, etc.  low noise: -86dB typical  low distortion in passband - 0.1% typical  low warm up drift  configurable into low distortion voltage controlled sine wave oscillator  bandwidth till 800kHz for electronic music AS3320 AS3320F РDIP-18 (300 mil) QFN-24 4x4mm 0,5mm General Description The AS3320 is a high performance voltage controlled four -pole filter with on-chip voltage controllable resonance IC. The four independent sections may be interconnected to provide a wide variety of filter responses, such as low pass, high pass, band pass and all pass. A single input exponentially controls the freq uency over greater than a ten octave range w ith little control voltage feed through. Another input controls the resonance in a modified linear manner from zero to low distortion oscillation. For those demanding applications, provision has been made to allow trimming for improved control voltage rejection. Each filter section features a variable gain cell which is fully temperature compensated, exhibits a bette r signal-to-noise ratio and generates its low distortion predominantly in the second harmonic. The d evice includes a minus two volt regulator to ensure low power dissipation and consequent low warm-up drift. Power pad in QFN package highly improves thermal stability of parameters of AS3320F. Pin Information Circuit Block and Connection Diagram (PDIP-18) РDIP-18 Pin No QFN-24L Pin No Pin Name Description 1 4 IN1 Input Stage 1 2 5 IN2 Input Stage 2 3 7 GND Ground 4 8 Cap2 Capacitor Stage 2 5 9 Cap1 Capacitor Stage 1 6 11 Out2 Output Stage 2 7 12 Out1 Output Stage 1 8 14 Vres Resonance Input 9 15 Ires Resonance Control Input 10 16 Out4 Output Stage 4 11 17 Cap4 Capacitor Stage 4 12 19 VCFI Voltage Control Frequency Input 13 20 Vee Negative power 14 22 Vcc Positive power 15 23 Out3 Output Stage 3 16 24 Cap3 Capacitor Stage 3 17 2 IN3 Input Stage 3 18 3 IN4 Input Stage 4 - Power pad Power pad Don’t connect SIGNAL INPUT SIGNAL OUTPUT FREQ. CNTL. INPUT RF RF RF RF RC RRC RC RC RI RRI 100K 220K 220K 220K 100K 100 91K 91K 91K 91K 100K 100K 100K 1,0 -15V -15V +15V IN3 Cap3 Out3 Vee VCFI Cap4 Out4 REE 300pF Cap2 Cap1 Out2 Out1 Vres Ires CP CP CP 300pF 300pF 300pF 51K 3,6K GM -1,9V REG. B B B B ex C.V. REJ. BIAS RB RB RB A A A A TOP VIEW Vcc RESONANCE CNTL. INPUT IN1 IN2 GND IN4 Absolute Maximum Ratings Voltage between Vcc and Vee pins Voltage between Vcc and GND pins Voltage between Vee and GND pins Voltage between Cell Input and GND pins Voltage between Frequency Control and GND pins Voltage between Resonance Control and GND pins Current through any pin Storage Temperature Range Operating Temperature Range +22V, -0,5V +18V, -0,5V -4V, -0,5V +0,5V, -6V ±6V +2V, -18V ±40mA - 55°C to 150°C - 25°C to 75°C

AS “АLFA RPAR” Joint Stock Company ALFA Riga, Latvia www.alfarzpp.lv; alfa@alfarzpp.lv 2018 v.6 AS3320 Electrical Characteristics * VCC=+15V RF = 100K TA= 25°C Parameter Min. Typ. Max. Units Gain of Variable Gain Cell at VCFI=0 0.7 1 1,3 Input Bias Current of Frequency Control Input 0.2 1 1.5 A Input Impedance of Resonance Signal Input 2.7 3.6 4.5 KΩ Output Swing At Clipping 10 12 14 V.P.P. Output voltage DC 1 5 6.5 9 V Buffer Input Bias Current ±10 ±30 ±100 nA Buffer Output Impedance 2 25 50 100 Ω Voltage at the negative supply pin 3 -2.4 -2.7 -2.9 V Positive Supply Current, ICC 3.8 5 6.5 mA Negative Supply Current, IEE 3 8 8.4 8.8 mA Typical Electrical Characteristics Parameter Min. Typ. Max. Units Pole Frequency Control Range 4 3500:1 10,000:1 - Sensitivity of Pole Frequency Control Scale, Midrange 57.5 60 62.5 mV/decade Tempco of Pole Frequency Control Scale 3000 3300 3600 ppm Exponential Error of Pole Frequency Control Scale5 - 4 12 % Max Gain of Variable Gain Cell 2.4 3 3.6 Tempco of Variable Gain Cell 6 - 500 1500 ppm Output Impedance of Gain Cell 6 0.5 1 2 MΩ Pole Frequency Control Feedthrough - 60 200 mV Pole Frequency Warm-up Drift - 0.5 1.5 % Gm of Resonance Control Element at ICR=100µA 0.8 1 1.2 mmhos Amount of Resonance Obtainable Before Oscillation 20 30 - dB Resonance Control Feedthrough 7 - 0.2 1,5 V Output Noise re Max Output 8 -76 -86 - dB Rejection in Bandreject 73 83 - dB Distortion in Passband 9,11 - 0.1 0.3 % Distortion in Bandreject 10,11 - 0.3 1 % Distortion of Sine Wave Oscillation 12 - 0.5 1.5 % Internal Reference Current, IREF 45 63 85 A Buffer Slew Rate 1.5 3 - V/S Buffer Sink Capability 0.4 0.5 0.63 mA Positive Supply Range, VCC +9 - +18 V Negative Supply Range, VEE 3 -4 - -18 V *) Specifications subject to change without notice. Note 1: VIN = 0, RC = 91KΩ, RF = 100KΩ Note 2: VCFI = 0 Note 3: Current limiting resistor always required. REE = (1.5 ÷ 2.2)KΩ Note 4: -20mV < VCFI < +160mV Note 5: -16mV < VCFI < +176mV. Most of this error occurs in upper two octaves. Note 6: V CFI = 0 Note 7: Untrimmed. 0 < ICR < 100µA Note 8: Filter is connected as low pass and set for 20 KHz cut-off frequency. Note 9: Output signal is 3dB below clipping point. Note 10: Output signal is 3dB below passband level, which is 3dB below clipping point. In general, this is worst case condition. Note 11: Distortion is predominantly second harmonic. Note 12: Sinewave is not clipped by first stage.

AS “АLFA RPAR” Joint Stock Company ALFA Riga, Latvia www.alfarzpp.lv; alfa@alfarzpp.lv 2018 v.6 AS3320 Device type Package AS3320 РDIP-18 (300 mil body) AS3320F QFN-24L (4*4 mm 0.5 mm)

Package Information

РDIP-18 (300 mil) QFN-24 4x4 mm 0.5 mm

Revision history

05-Oct-2016 1 Short version 1 09-Jan-2017 2 QFN-24L – new package 20-Mar-2017 3 Drawing and typical electrical characteristics updated 09-May-2017 4 Block circuit and typical electrical characteristics updated 29-May-2017 5 Minor changes 21-May-2018 6 Minor changes