AS3340 ALFA | Alldatasheet
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AS “АLFA RPAR” Joint Stock Company ALFA Riga, Latvia www.alfarzpp.lv; alfa@alfarzpp.lv 2018 v.5 1 AS3340 AS3345 AS3340 / AS3345 - Voltage Controlled Oscillator (VCO) FEATURES AS3340 AS3340D Large Sweep Range: 500,000:1 Fully Temperature Compensated Four Output Waveforms Available; No waveform trimming required Summing Node Inputs for Frequency Control High Exponential Scale Accuracy Low Temperature Drift Voltage Controlled Pulse Width Hard and Soft Sync Inputs Linear FM Buffered, Short Circuit Protected Outputs ±15 Volt Supplies РDIP-16 (300 mil) SOIC-16 (150 mil) AS3345 AS3345F РDIP-18 (300 mil) QFN-24 4x4 mm 0,5 mm
APPLICATIONS
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 temp erature 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: REE = (VEE - 7.4) / .008 To minimize self-heating and improve thermo-stability it is recommended to keep VEE = -5V (external power supply). Power pad in QFN package highly improves thermal stability of parameters of AS3345F. AS3340 Pin Information AS3340 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 VEE Negative supply
4 VP Pulse Output
5 VPWM PWM Control Input
6 VHSI Hard Synchronization
7 VHFT High Frequency
8 VSO Sawtooth Output
9 VSSI Soft Synchronization
10 VTO Triangle Output
11 Cap Capacitor
12 GND Ground
13 VLFI Linear FM Input
14 VS Scale
15 VFCI Frequency Control
16 VCC Positive supply
470 10nF TOP VIEW 4 5 6 7 8 910111213141516 +15V 2 3 FREQ. CNTL. INPUTS LINEAR FM INPUT SOFT SYNC. INPUT0V +5V+15V+15V RR 1.5M1M 10nF 100nF RS 1.8K 470 360K 100K 100K 100K PRECISION MULTIPLIER CF 1nF Q1 A2 - + CM CM + -V+ 4X1X 14.4K 14.4K 1nF -1.3V6.3K BUF - + + - 14.4K 7.2K TRI. TO SAW CONV. HIGH FREQ. TRACK 1nF 20K HARD SYNC. INPUT P .W.M. CNTL. INPUT +12V +10V REE -15V 820 51K RT RZ 10K 24K 5.6K 7.4V V+ - TEMPCO GEN
AS “АLFA RPAR” Joint Stock Company ALFA Riga, Latvia www.alfarzpp.lv; alfa@alfarzpp.lv 2018 v.5 2 AS3340 AS3345 AS3345 Pin Information AS3345 Circuit Block and Connection Diagram PDIP-18 (QFN-24) РDIP-18, Pin No QFN-24, Pin No Pin Name Description 1 4 Scale 1 Scale Adjust 1 2 5 Scale 2 Scale Adjust 2 3 7 VEE Negative supply 4 8 VP Pulse Output 5 9 VPWM PWM Control Input 6 11 VHSI Hard Synchronization Input 7 12 VMO Meander Output 8 14 VHFT High Frequency Track 9 15 VSO Sawtooth Output 10 16 VSSI Soft Synchronization Input 11 17 VTO Triangle Output 12 19 Cap Capacitor 13 20 GND Ground 14 22 GND Ground 15 23 VLFI Linear FM Input 16 24 VS Scale 17 2 VFCI Frequency Control Input 18 3 VCC Positive supply - 1,6,10, 13,18,21 NC Not connected - Power Pad Power Pad Don’t connect (3) +15V 17 (2) FREQ. CNTL. INPUTS +15V360K 100K 100K 100K 470 10nF TOP VIEW PRECISION MULTIPLIER +V+ RT RZ 10K 24K 5.6K TEMPCO GEN (16)(17)(19)(20) (7) LINEAR FM INPUT SOFT SYNC. INPUT0V +5V+15V RR 1.5M1M 10nF 100nF RS 1.8K 470 CF 1nF Q1 A2 - + CM CM Q3 Q2 14.4K 15K 1nF -1.3V 6.3K BUF - + + - 14.4K 7.2K TRI. TO SAW CONV. HIGH FREQ. TRACK1nF 12K HARD SYNC. INPUT P .W .M. CNTL. INPUT +12V +10V REE -15V 820 51K 7.4V V+ - B +15V-15V 14.4K 20K (14) (24) (23) (22) (8) (15) 18 16 1 2 9876543 101112131415 Output Waveforms +5V +12V +10V NEGATIVE HARD SYNC. POSITIVE AND NEGATIVE HARD SYNC. POSITIVE HARD SYNC. SYNC. INPUT PULSE OUTPUT SAWTOOTH OUTPUT TRIANGLE OUTPUT Absolute Maximum Ratings Voltage Between VCC and VEE Pins Voltage Between VCC and GND Pins Voltage Between VEE 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
AS “АLFA RPAR” Joint Stock Company ALFA Riga, Latvia www.alfarzpp.lv; alfa@alfarzpp.lv 2018 v.5 3 AS3340 AS3345 Typical Electrical Characteristics VCC=+15V VEE = Internal Zener TA= 20° Parameter Min. Typ. Max. Units Frequency Control Range 50K:1 500K:1 - Exponential Scale Error, Untrimmed1 - 0.2 1 % Exponential Scale Error, Trimmed1 - 0.05 0,3 % Multiplier Gain Errors2 - 0.0005 0.008 %/µA Tempo Cancellation3 -150 0 +150 ppm Oscillator Drift4 - ±50 ±200 ppm Triangle Buffer Input Current - 0.3 3 nA Triangle Waveform Upper Level 4.85 5.0 5.15 V Triangle Waveform Lower Level -15 0 +15 mV Triangle Waveform Symmetry 45 50 55 % Sawtooth Waveform Upper Level 9.4 10.0 10.6 V Sawtooth Waveform Lower Level -25 0 +25 mV Triangle Output Sink Capability 400 550 750 µA Sawtooth Output Sink Capability 640 800 1000 µA Triangle& Sawtooth Output Impedance5 65 100 150 Ω Pulse Output Source Capability at +10V 2.8 3.5 4.6 mA PWM Input Pin Current 7 .5 1.5 3.5 µA PWM Input Voltage for 0% Pulse Width -15 0 +15 mV PWM Input Voltage for 100% Pulse Width 4.6 5.0 5.4 V Input Bias Current at Reference and Control Current Inputs 80 200 400 nA Tempco of Input Bias Currents -1000 0 +1000 ppm Offset Voltage at Reference and Control Current Inputs -5 0 +5 mV Hard Sync Reference Voltage -1.2 -1.4 -1.5 V Hard Sync Input Resistance 5 6.3 7.9 KΩ Max Capacitor Charge/Discharge Current 400 570 800 µA Positive Supply Current 4 5 6.5 mA Positive Supply Voltage Range +10 - +18 V Negative Supply Voltage Range 8 -4.5 - -18 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 gai ns at any two input cur rents, 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 m aximum 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.
AS “АLFA RPAR” Joint Stock Company ALFA Riga, Latvia www.alfarzpp.lv; alfa@alfarzpp.lv 2018 v.5 4 AS3340 AS3345 Package Information. Units: inch (mm) Device type Package AS3340 РDIP-16 (300 mil body) AS3340D SOIC-16 (150 Mil) РDIP-16 (300 Mil) SOIC-16 (150 Mil)
AS “АLFA RPAR” Joint Stock Company ALFA Riga, Latvia www.alfarzpp.lv; alfa@alfarzpp.lv 2018 v.5 5 AS3340 AS3345 Device type Package AS3345 РDIP-18 (300 mil body) AS3345F QFN-24L (4*4 mm 0.5 mm) Units: inch (mm) РDIP-18 (300MIL) QFN-24 4x4 mm 0.5 mm
Revision history
28-Aug-2017 1 Preliminary version 1 10-Sep-2017 2 Minor changes 19-Dec-2017 3 Changes in Description and Block Diagram 07-Mar-2018 4 Changes in Description 31-May-2018 5 Minor changes