AS АLFA RPAR Joint Stock Company ALFA Riga, Latvia AS3340 / AS Voltage Controlled Oscillator (VCO)

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Grace Matthews
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No waveform trimming required Summing Node s for Frequency Control High Exponential Scale Accuracy Low Temperature Drift Voltage Controlled Pulse Width Hard and Soft Sync s Linear FM Buffered, Short

1 6.3K 7.2K 360K AS АLFA RPAR / - Voltage Controlled Oscillator (VCO) FEATURES D Large Sweep Range: 500,000:1 РDIP-16 (300 mil) SOIC-16 (150 mil) Fully Temperature Compensated Four Output Waveforms Available; No waveform trimming required Summing Node s for Frequency Control High Exponential Scale Accuracy Low Temperature Drift Voltage Controlled Pulse Width Hard and Soft Sync s Linear FM Buffered, Short Circuit Protected Outputs ±15 Volt Supplies APPLICATIONS for electronic music РDIP-18 (300 mil) F QFN-24 4x4 mm 0,5 mm General Description The AS 3340 and AS 3345 are completely self contained, precision voltage controlled oscillators, featuring both exponential and linear control scales and up to four buffered output waveforms: triangle, sawtooth, square, and pulse with voltage controllable pulse width. Full temperature compensation makes these VCOs extremely stable, and eliminates the need for a temperature compensation resistor. The highly accurate exponential and linear control inputs are virtual ground summing nodes, allowing multiple control voltages to be mixed within the device itself. Also included is provision for hard and soft synchronization of the frequency, and an output for easy adjustment of high frequency tracking. Special care in the design ensures oscillation start-up under any power-on sequence and supply conditions. An on-chip 7.4 volt Zener diode allows the device to operate off ±15 volt supplies, as well as +15,-5 volt supplies. For voltages greater than -7.5 volts, a series current limiting resistor must be added between pin 3 and the negative supply. Its value is calculated as follows: R EE = (V EE - 7.4) /.008 To minimize self-heating and improve thermo-stability it is recommended to keep V EE = -5V (external power supply). Power pad in QFN package highly improves thermal stability of parameters of F. Pin Information Circuit Block and Connection Diagram РDIP-16, SOIC-16 Pin No Pin Name Description 1 Scale 1 Scale Adjust 1 2 Scale 2 Scale Adjust 2 3 V EE Negative supply 4 V P Pulse Output 5 V PWM PWM Control 6 V HSI Hard Synchronization 7 V HFT High Frequency Track 8 V SO Sawtooth Output 9 V SSI Soft Synchronization 10 V TO Triangle Output 11 Cap Capacitor 12 GND Ground 13 V LFI Linear FM 14 V S Scale 15 V FCI Frequency Control 16 V CC Positive supply 470 TOP VIEW FREQ. CNTL. S A1 PRECISION MULTIPLIER LINEAR FM 100nF RR 1.5M RS 1.8K 14 1X Q1 A2 Q SOFT Q3-1.3V TRI. TEMPCO TO - GEN SAW CM + CONV. 7.4V V K HIGH RT FREQ. TRACK RZ REE 20K 5.6K 51K +12V P.W.M. HARD +1 10K 820 CNTL. -15V CM CF BUF v.5 1

2 . TRIANGLE SAWTOOTH PULSE 360K 6.3K 15K 7.2K. AS АLFA RPAR Pin Information РDIP-18, QFN-24, Pin Pin No Pin No Name Description 1 4 Scale 1 Scale Adjust Scale 2 Scale Adjust V EE Negative supply 4 8 V P Pulse Output 5 9 V PWM PWM Control 6 11 V HSI Hard Synchronization 7 12 V MO Meander Output 8 14 V HFT High Frequency Track 9 15 V SO Sawtooth Output V SSI Soft Synchronization V TO Triangle Output Cap Capacitor GND Ground GND Ground V LFI Linear FM V S Scale 17 2 V FCI Frequency Control 18 3 V CC Positive supply - 1,6,10, 13,18,21 NC Not connected - Power Power Pad Pad Don t connect Circuit Block and Connection Diagram PDIP-18 (QFN-24) 470 TOP VIEW FREQ. CNTL. S 100nF RZ 18 (3) 17 (2) 16 A1 PRECISION MULTIPLIER TEMPCO GEN RS 1.8K LINEAR FM RR 1.5M 470 (24) 15 (23) 14 (22) 13 Q1 1X Q3 - CM + 7.4V V- A2 Q2 (20) 12 (19) 11 (17) 10 SOFT 1 (4) 2 (5) 3 (7) 4 (8) 5 (9) 6 (11) 7 (12) 8 (14) 9 (15) 24K HIGH FREQ. RT REE TRACK 51K 5.6K +12V P.W.M K 20K 10K 820 CNTL. HARD -15V -15V CM -1.3V B CF BUF TRI. TO SAW CONV. (16) Output Waveforms POSITIVE HARD NEGATIVE HARD +1 POSITIVE AND NEGATIVE HARD +12V Absolute Maximum Ratings Voltage Between V CC and V EE Pins Voltage Between V CC and GND Pins Voltage Between V EE and GND Pins Current through Any Pin Voltage Between Frequency Control Pin or Reference Current Pin and GND Pin Voltage Between Multiplier Output Pin and GND Pin Storage Temperature Range Operating Temperature Range +24V, -0,5V +18V, -0,5V -6V, +0,5V ±40mA ±6V +6V, -1V - 55 C to 150 C - 25 C to 75 C 2018 v.5 2

3 Typical Electrical Characteristics V CC= V EE = Internal Zener T A= 20 Parameter Min. Typ. Max. Units Frequency Control Range 50K:1 500K:1 - Exponential Scale Error, Untrimmed % Exponential Scale Error, Trimmed ,3 % Multiplier Gain Errors %/µa Tempo Cancellation ppm Oscillator Drift 4 - ±50 ±200 ppm Triangle Buffer Current na Triangle Waveform Upper Level V Triangle Waveform Lower Level mv Triangle Waveform Symmetry % Sawtooth Waveform Upper Level V Sawtooth Waveform Lower Level mv Triangle Output Sink Capability µa Sawtooth Output Sink Capability µa Triangle& Sawtooth Output Impedance Ω Pulse Output Source Capability at ma Squarewave Output Levels 6, -1.8, ,0-0.8,+0.4 V PWM Pin Current µa PWM Voltage for 0% Pulse Width mv PWM Voltage for 100% Pulse Width V Bias Current at Reference and Control Current s na Tempco of Bias Currents ppm Offset Voltage at Reference and Control Current s mv Hard Sync Reference Voltage V Hard Sync Resistance KΩ Max Capacitor Charge/Discharge Current µa Positive Supply Current ma Positive Supply Voltage Range V Negative Supply Voltage Range V Note 1: This error represents the percentage difference in scale factors (volts per frequency ratio) of the exponential generator anywhere over the exponential generator current range of 50nA to 100 µa. Most of this error occurs at the range extremities. Note 2: This error represents the percentage difference in multiplier gains at any two input currents, within the range of 20 µa to 180 µa, per µa difference between the two corresponding outputs. Note 3: This spec represents the difference between the actual tempco of the multiplier output voltage (expressed relative to the maximum output excursions) and the tempco required to precisely cancel the tempco of the exponential scale factor (q/kt). Note 4: The multiplier output is grounded. Note 5: For exponential generator currents less than 10 µa; above 10 µa, impedance drops to 1 /3 this value as the highest current is approached. Note 6: With respect to the hard sync input reference voltage. Note 7: For PWM control inputs between -1 and +6 volts. This current is significantly greater for inputs outside of this range. Note 8: Current limiting resistor required for negative supplies greater than -6 volts. Specifications subject to change without notice v.5 3

4 Package Information. Device type D Package РDIP-16 (300 mil body) SOIC-16 (150 Mil) Units: inch (mm) РDIP-16 (300 Mil) SOIC-16 (150 Mil) 2018 v.5 4

5 Device type Package РDIP-18 (300 mil body) F QFN-24L (4 * 4 mm 0.5 mm) Units: inch (mm) РDIP-18 (300MIL) QFN-24 4x4 mm 0.5 mm Revision history Date Revision Changes 28-Aug Preliminary version 1 10-Sep Minor changes 19-Dec Changes in Description and Block Diagram 07-Mar Changes in Description 31-May Minor changes 2018 v.5 5

Voltage Controlled Oscillator V3340

Voltage Controlled Oscillator V3340 oltage Controlled Oscillator. General Description The is a high precision oltage Controlled Oscillator, featuring both exponential and linear control scales plus up to buffered output waveforms: triangle,