Semiconductors

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 highfrequency tracking. Special care in the design ensures oscillation start-up under any power-on sequence and supplyConditions.Features:• 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 SuppliesApplications:• for electronic music

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 highfrequency tracking. Special care in the design ensures oscillation start-up under any power-on sequence and supplyConditions.Features:• 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 SuppliesApplications:• for electronic music

The AS 3350 is a dual voltage controlled state-variable filter intended for electronic musical instruments and other signal processing applications. Each filter provides both voltage control of center/cut-off frequency over more than 12 octaves and voltage control of Q from 1/2 to greater than 40. All control scales are exponential, allowing for easier control of the parameters over their wide range. Although the two filters are completely independent, they may be easily interconnected to form a wide variety of filter responses.Each filter also provides two signal inputs: For signals applied to the fixed gain input, the output will remain constant as the Q is varied, while for signals applied to the variable gain input, the output decreases as Q is increased. The input signal may be proportioned between these two inputs to provide any desired characteristic.Finally, each filter provides two simultaneous outputs, making directly available low-pass and band-pass, or band-pass and high-pass responses depending upon where the input signal is applied.Able to operate over a wide supply range, the versatile AS 3350 allows new and unique filter responses to be created with a high degree of voltage control over the defining parameters.Features:• two Independent state variable filters• separate frequency and Q control Inputs for each channel• wide frequency sweep and Q control range• exponential control scales for both frequency and Q• two simultaneous outputs on each: Low-Pass and Band-Pass or Band-Pass and High-Pass possible• two simultaneous inputs for each: fixed gain and variable gain• configurable Into many V.C. filters• wide supply range: ±3V to ±16VApplications:• for electronic music

The AS3360, AS3360A is a dual general purpose voltage controlled transconductor intended for such applications as voltage controlled amplifiers, filters, and waveform generators. Each transconductor independently provides both linear and exponential control scaling over greater than a 100 dB range (AS3360A). Complete with virtual ground summing inputs, wide voltage compliance current outputs, and control inputs referenced to ground, the AS3360 requires exceptionally few external components and is extremely easy to use.Because of its inherent ultra-low control feedthrough, no trimming is required. Added to these features are exceptionally low noise and wide bandwidth making the AS3360 a real cost saver in most applications requiring variable transconductance amplifiers.AS3360A benefits from internal bandgap reference which improves stability of reference voltage and output current of VCA and improved level of attenuation of output current at zero control voltage.Features:• two independent VCAs in a single 14 pin package simple to use - few external components required• exceptionally low control feedthrough without trimming: 10mV maximum - 10 V.P.P. output• low noise: -110 dB typical• no trimming required• summing node signal inputs• current outputs capable of swinging to within 1,5V of each supply• linear and exponential controlApplications:• for electronic music

The AS3360, AS3360A is a dual general purpose voltage controlled transconductor intended for such applications as voltage controlled amplifiers, filters, and waveform generators. Each transconductor independently provides both linear and exponential control scaling over greater than a 100 dB range (AS3360A). Complete with virtual ground summing inputs, wide voltage compliance current outputs, and control inputs referenced to ground, the AS3360 requires exceptionally few external components and is extremely easy to use.Because of its inherent ultra-low control feedthrough, no trimming is required. Added to these features are exceptionally low noise and wide bandwidth making the AS3360 a real cost saver in most applications requiring variable transconductance amplifiers.AS3360A benefits from internal bandgap reference which improves stability of reference voltage and output current of VCA and improved level of attenuation of output current at zero control voltage.Features:• two independent VCAs in a single 14 pin package simple to use - few external components required• exceptionally low control feedthrough without trimming: 10mV maximum - 10 V.P.P. output• low noise: -110 dB typical• no trimming required• summing node signal inputs• current outputs capable of swinging to within 1,5V of each supply• linear and exponential controlApplications:• for electronic music

AS3363 contains three VCA blocks, which are intended for use in musical synthesizer applications (VCA blocks, voltage polarizer, multiplexers, morphing, ring modulators etc.). VCA1 and VCA2 implement function of controlling amplification and sign of output signal (voltage polarizing - changing sign and amplitude through “silence”). Additional control input controls attenuation of output current - thus realizing function of double multiplication input signal on two control signals. VCA3 block has additional feature – possibility of control/mixing of two input signals.Such solution gives vast opportunities in designing new synth solutions.Features:• three VCA blocks with a wide range of functions containing three 4-quadrant multipliers and 3 2-quadrant multipliers• two linear controls for each VCA• simple signal mixing• can combine high impedance outputs• provides high attenuation (-100 dB)• simplifies multiplexer design• low current consumption of 3 mA typ at ±12VApplications:• for electronic music

The AS3364 is a quad general purpose voltage linearly controlled VCA intended for such applications as voltage controlled amplifiers, filters, and waveform generators. Each VCA independently provides linear control scaling over greater than a 100 dB range. Complete with virtual ground summing inputs, wide voltage compliance current outputs, and control inputs referenced to ground, the AS3364 requires exceptionally few external components and is extremely easy to use.Because of its inherent ultra-low control feedthrough, no trimming is required. Added to these features are exceptionally low noise, wide bandwidth, and operation down to ± 3 volts, making the AS3364 a real cost saver in most applications requiring variable transconductance amplifiers.AS3364 pinout allows simple replacement of AS2164 (adding just one capacitor to Vref) witch simplify circuit design with linear control.Features:• “Linear replacement” – “pin compatible” to AS2164• Exceptionally low control feedthrough without trimming: 10mV maximum out of 10 V.P.P. output• Low noise: -110 dB typical• Summing node signal Inputs• Current outputs capable of swinging to within 1,5V of each supply• Control voltages referenced to ground• Wide supply range: ±3 to ±12V or +15, - 3 to - 9 VApplications:• for electronic music

AS3365 contains three VCA blocks, which are intended for use in musical synthesizer applications (VCA blocks, faders, panners, multiplexers, ring modulators etc.). VCA1 and VCA2 implement function of controlling amplification. A direct signal CVMix1 is supplied to the VCA1 control, an inverted CVMix2 signal is supplied to the VCA2 control. Using two amplifiers VCA1 and VCA2 together, you can implement the function of stereo panning of the input signal. Additional control input Vcntrl controls attenuation of output current - thus realizing function of double multiplication input signal on two control signals. VCA3 block has additional feature – possibility of control/mixing of two input signals.Vast opportunities in designing new synth solutions:    ♦ panner and crossfader designs can use the same single CV signal, because the CV input on VCA2 works in the inverse direction of the CV input on VCA1;    ♦ possibility to use the four-quadrant VCA3 to generate a correction curve for equal loudness (RMS) panning and fading;    ♦ voltage controlled processing and inversion of control voltage signals, like envelope and LFO signals;    ♦ when signal inputs are DC-coupled then both audio signals and low frequency modulation CV signals can be processed with the same circuit;    ♦ normalization on audio input and output connectors can switch between a panning or a crossfading function, depending on how signals are plugged in.Features:• “Linear replacement” – “pin compatible” to AS2164• Exceptionally low control feedthrough without trimming: 10mV maximum out of 10 V.P.P. output• Low noise: -110 dB typical• Summing node signal Inputs• Current outputs capable of swinging to within 1,5V of each supply• Control voltages referenced to ground• Wide supply range: ±3 to ±12V or +15, - 3 to - 9 VApplications:• Voltage controlled mixing for audio mixers and music synthesizers: crossfading, panning, ring modulation, stereo panning, audio switching, control signal processing, audio compression with side-chain function, etc.• for electronic music

The AS 3372E is a general purpose signal processing device for audio tone sources. Included on-chip are a two channel voltage controlled input mixer, a dedicated 4-pole low pass voltage controlled filter with voltage controllable resonance, universal mixing/panning VCA-block and a quality final voltage controlled amplifier. With the exception of the filter cut-off frequency, (the filter frequency control voltage ranges from - 150mV to +100mV) all control inputs are very low bias current, high impedance inputs which range from 0 to + 5 volts. This feature allows the common DAC output voltage in a microprocessor system to be multiplexed to these inputs with only a CMOS analog multiplexer and hold capacitors, thus eliminating the usual Sample & Hold buffers.The two input VCAs of the mixer feature audio taper control scales and high attenuation at zero control voltage. The signal inputs are low level (±40mV for 5% THD), allowing multiple tone sources to be conveniently mixed into each channel. Additional filter input allows design flexibility.A unique feature of the 24dB/octave filter is that, unlike others of this type, the passband gain remains constant as the amount of resonance is varied, thus eliminating the annoying drop in volume at higher resonance settings. Other features include wide frequency control range, temperature compensated transconductors, low noise, low control feed-through, and a smooth behaviour when swept.The final output VCA is a current in, current out type, allowing multiple inputs to be easily mixed into its input, and easy interface of its output to the rest of the system. The control scale is very linear, and the point at which the VCA shuts off is very well defined (+100mV ± 50mV). Owing to its exceptionally low noise and exceptionally low control feedthrough without trimming, this VCA is well suited to being controlled by fast transient waveforms.Universal mixing/panning VCA block provides flexible signal processing solutions.Features:• 2-channel VC input mixer with external input• 4-pole low pass VCF & Quality Final VCA• universal mixing/panning VCA-block• 0 to +5V high Z control Inputs for direct interface to system DAC from CMOS multiplexer• VCF uses open loop design for enhanced sound richness• VCF has constant loudness as resonance changed• TC compensated VCF• Final VCA has low feed-through without trimming

AS3381 is a dual low noise voltage controlled amplifier, with linear scale, intended for applications requiring high audio performance in a small space. AS3381 contains two gain cells with extremely low noise for signal-to-noise ratio better than 100 dB, low distortion with less than 0.3% THD, and low control feedthrough for "pop" free performance when gain modulated.AS3381 is also extremely easy to use, requiring few external components and no external trimming to meet their excellent performance. The signal inputs are summing node inputs for convenient signal mixing; and the control voltage inputs, covering over 100dB with a 5 volt nominal range, are referenced to ground when the outputs feed virtual ground summing nodes. The current mode outputs offer additional flexibility, allowing AS3381 to be used in high performance VC filters and waveform generators as well as amplifiers.Features:• two high performance VCAs• extremely low noise: > 100dB S/N ratio• low distortion: <0.3% THD• low feedthrough: <0.3% of full scale outputApplications:• voltage controlled stereo levels• programmable mixers• high performance AGC, compandors and limiters• voltage programmable filters and oscillators• for electronic music

The AS3394E is a complete analog music synthesizer voice-on-a-chip intended for software control by a microprocessor system. Included inside the compact 24 pin package is fully temperature compensated, wide range, voltage controlled oscillator providing sub-oscillator, triangle, saw-tooth, and pulse waveforms; a voltage controlled mixer for adjusting the balance between the internally generated VCO waveforms and any external signal; a dedicated four-pole low-pass voltage controlled filter with voltage controlled resonance; a modulation amount VCA for modulating the filter frequency by the triangle waveform output of the VCO; and a final VCA for allowing the output to be enveloped. Envelope control for both the VCF and final VCA may be provided by either a hardware envelope generator such as the AS3310 or through software.All eight control inputs are provided with internal very high input impedance, low bias current buffers. Thus interface to a microprocessor system may be accomplished simply with a single DAC, 4051-type CMOS multiplexer, and 8 hold capacitors.Requiring a bare minimum of other external components, the AS3394E is ideal for low cost polyphonic or polytimbric musical instruments featuring rich, analog sound.AS3394EA is an improved version of AS3394E.Features:• Complete synthesizer Voice on a Chip• Sample & Hold buffers on-chip for easy interface to a μP• Fully temperature compensated VCO• Independently selectable VCO waveforms• Sub-oscillator output• Separate saw-tooth output• Separate VCO and filter sections allowing design flexibility• Constant Loudness vs Resonance VCF• Rich Sounding VCF Design• Filter FM routing for more Timbres• Low Noise, Low Feedthrough VCA

AS3944 is an array of 4 NPN transistor that offers excellent matching for precision amplifier and nonlinear applications. Performance characteristics include high gain over a widerange of collector current and Vcb, and excellent logarithmic conformance. AS3944 also features of low offset voltage μV and tight current gain matching. Each transistor is individually tested to data sheet specifications.For matching parameters (offset voltage, input offset current, and gain match), each of the dual transistor combinations are verified to meet stated limits. The long-term stability of matching parameters is guaranteed by the protection diodes across the base-emitter junction of each transistor. These diodes prevent degradation of beta and matching characteristics due to reverse bias base-emitter current. Logarithmic conformance and accurate matching characteristics makes AS3944 an excellent choice for use in log and antilog circuits.Features:• low offset voltage 200 μV• high current gain 400• matching guaranteed for all transistors

The AS194 and AS394 are junction isolated ultra well-matched monolithic NPN transistor pairs with an order of magnitude improvement in matching over conventional transistor pairs.Electrical characteristics of these devices such as drift versus initial offset voltage, noise, and the exponential relationship of base-emitter voltage to collector current closely approach those of a theoretical transistor. Extrinsic base and emitter resistances are very low, giving very low noise and operating over a wide current range.To guarantee long term stability of matching parameters, internal clamp diodes have been added across the emitter-base junction of each transistor. These prevent degradation due to reverse biased emitter current- the most common cause of field failures in matched devices. The parasitic isolation junction formed by the diodes also clamps the substrate region to the most negative emitter to ensure complete isolation between devices.The AS194H, AS394H, AS394CH are available in the 8-pin metal can TO5-8 package, the AS194DE and AS394DE in the 8-lead plastic SOIC-8 (150mil) EPAD package.Features:• "Ideal" and identical transistors• Common-mode rejection ratio > 120dB• Emitter-base offset voltage < 100v• Emitter-base offset voltage temperature drift 0.1µV/°C• Current gain (hFE) matched <2%• Parameters are guaranteed in the range of collector current of 10µA - 1mA• Noise Voltage Density of 1.8nV/srt(Hz)• Ideal logarithmic properties

The AS395 dual monolithic PNP transistor offers excellent parametric matching and high frequency performance. Low noise characteristics (1 nV/√Hz typ @ 1 kHz), high bandwidth (190 MHz typical), and low offset voltage (100 μV max), makes the AS395 an excellent choice for demanding preamplifier applications.Tight current gain matching (3% max mismatch) and high current gain (100 min), over a wide range of collector current, makes the AS395 an excellent choice for current mirrors. A low value of bulk resistance makes the AS395 an ideal component for applications requiring accurate logarithmic conformance.To insure the long-term stability of the matching parameters, internal protection diodes across the base-emitter junction clamp any reverse base-emitter junction potential. This prevents a base-emitter breakdown condition which can result in degradation of gain and matching performance due to excessive breakdown current.The AS395H are available in the 8-pin metal can TO5-8.Features:• dual matched PNP transistor• low offset voltage: 100 μV max• low noise: 1 nV/√Hz @ 1 kHz typ• high gain: 100 min• high gain bandwidth: 190 MHz typ• tight gain matching: 3% max• excellent logarithmic conformance

AS401 / AS401A is bipolar-input Hi-End audio operational amplifier and provide ultra-low THD+Noise level - 130dB (1Khz) and -110dB (40kHz) for RL= 600 Ohm & CL=100 pF. Amplifier drives a 32 Ohm load at 10 mW and 600 Ohm load at 70 mW. AS401 is unity-gain stable and provides excellent dynamic behavior over a wide range gain and load conditions at a wide supply range of ±4,5 to ±18 V.AS401A benefits from additional balance inputs (offset trimming) and additional pin for case shielding.AS401 / AS401A is a hybrid module with DIP8 footprint.Features:• Hi-End sound quality• less then 2 nV/√Hz low input voltage noise• ultra-low total harmonic distortion+ noise (RL = 600 Ohm CL = 330 pF):         0,00015 % at 20 kHz         0,00036 % at 40 kHz• unity-gain stable at RL=600 Ohm CL=1000 pF• phase margin at G=+1 & RL = 600 Ohm without external correction:         125° at CL=100 pF           60° at CL=330 pF• slew rate G=+1 30 V/μS & RL = 600 Ohm CL = 330 pF• low input offset voltage 250μV (max)• bandwidth > 35MHz• wide supply range +9 V to +36 V (±4,5 V -±18 V)• input current < 1μA• linear output stage class A• low small-signal overshoot with capacitive load (100mV output step):               8% RL=600 Ohm, RSL=0 Ohm, CL=100 pF;             10% RL=600 Ohm, RSL=0 Ohm, CL=250 pF;             30% RL=600 Ohm, RSL=0 Ohm, CL=1000 pF;             15% RL=600 Ohm, RSL=25 Ohm, CL=1000 pF• no phase reversal• peak-to-peak output voltage swing 32V typ. with Vcc= ±18V and Rl=600 Ohm

AS401 / AS401A is bipolar-input Hi-End audio operational amplifier and provide ultra-low THD+Noise level - 130dB (1Khz) and -110dB (40kHz) for RL= 600 Ohm & CL=100 pF. Amplifier drives a 32 Ohm load at 10 mW and 600 Ohm load at 70 mW. AS401 is unity-gain stable and provides excellent dynamic behavior over a wide range gain and load conditions at a wide supply range of ±4,5 to ±18 V.AS401A benefits from additional balance inputs (offset trimming) and additional pin for case shielding.AS401 / AS401A is a hybrid module with DIP8 footprint.Features:• Hi-End sound quality• less then 2 nV/√Hz low input voltage noise• ultra-low total harmonic distortion+ noise (RL = 600 Ohm CL = 330 pF):         0,00015 % at 20 kHz         0,00036 % at 40 kHz• unity-gain stable at RL=600 Ohm CL=1000 pF• phase margin at G=+1 & RL = 600 Ohm without external correction:         125° at CL=100 pF           60° at CL=330 pF• slew rate G=+1 30 V/μS & RL = 600 Ohm CL = 330 pF• low input offset voltage 250μV (max)• bandwidth > 35MHz• wide supply range +9 V to +36 V (±4,5 V -±18 V)• input current < 1μA• linear output stage class A• low small-signal overshoot with capacitive load (100mV output step):               8% RL=600 Ohm, RSL=0 Ohm, CL=100 pF;             10% RL=600 Ohm, RSL=0 Ohm, CL=250 pF;             30% RL=600 Ohm, RSL=0 Ohm, CL=1000 pF;             15% RL=600 Ohm, RSL=25 Ohm, CL=1000 pF• no phase reversal• peak-to-peak output voltage swing 32V typ. with Vcc= ±18V and Rl=600 Ohm

AS402 is two channel bipolar-input Hi-End audio operational amplifier and provide ultra-low THD+Noise level -130dB (1Khz) and -110dB (40kHz) for Rl= 600 Ohm & Cl=100 pF. Amplifier drives a 32 Ohm load at 10 mW and 600 Ohm load at 70 mW. AS401 is unity-gain stable and provides excellent dynamic behavior over a wide range gain and load conditions at a widesupply range of ±4.5 to ±18 V.AS402 is a hybrid module with DIP8 footprint.Features:• Hi-End sound quality• less then 2 nV/√Hz low input voltage noise• ultra-low total harmonic distortion+ noise (RL = 600 Ohm CL = 330 pF):         0,00015 % at 20 kHz         0,00036 % at 40 kHz• unity-gain stable at RL=600 Ohm CL=1000 pF• phase margin at G=+1 & RL = 600 Ohm without external correction:          125° at CL=100 pF            60° at CL=330 pF• slew rate G=+1 30 V/μS & RL = 600 Ohm CL = 330 pF• low input offset voltage 250μV (max)• bandwidth > 35MHz• wide supply range +9 V to +36 V (±4,5 V -±18 V)• input current < 1μA• linear output stage class A• low small-signal overshoot with capacitive load (100mV output step):               8% RL=600 Ohm, RSL=0 Ohm, CL=100 pF;             10% RL=600 Ohm, RSL=0 Ohm, CL=250 pF;             30% RL=600 Ohm, RSL=0 Ohm, CL=1000 pF;             15% RL=600 Ohm, RSL=25 Ohm, CL=1000 pF• no phase reversal• peak-to-peak output voltage swing 32V typ. with Vcc= ±18V and Rl=600 Ohm

AS571 is a versatile low cost dual gain control circuit in which either channel may be used as a dynamic range compressor or expandor. Each channel has a full-wave rectifier to detect the average value of the signal, a linearized temperature-compensated variable gain cell, and an operational amplifier.AS571 is well suited for use in VCA blocks, noise reduction systems, compandors/expanders ,etc.Features:• complete compressor and expandor• temperature compensated• channel separation >86 dB• greater than 110 dB dynamic range• levels adjustable with external components• distortion may be trimmed outApplications:• VCA• high level limiter• low level expandor − noise gate• dynamic filters• dynamic noise reduction systems

Low Cost Low Power Instrumentation Amplifier• Gain Set with One External Resistor :G= 1 + (49,4 kΩ/RG) (Gain Range 1 to 1000)• Wide Power Supply Range (±2.3 V to ±18 V)• Higher Performance than Three Op Amp IA Designs• Available in 8-Lead SOIC Packaging• Low PowerFeatures:• Pin-to-pin compatible with industry standard AD620Applications:• Weigh Scales• ECG and Medical Instrumentation• Transducer Interface• Data Acquisition Systems• Industrial Process Controls• Battery Powered and Portable Equipment

The AS662D consists of two current-controlled transconductance amplifiers OTA, each with differential inputs and a push-pull output. Both amplifiers share common supplies, but operate independently. Two buffers allows external control and gives flexibility in application.Features:• gm adjustable over 6 decades• excellent gm linearity• excellent matching between amplifiers• controlled buffer• high output SNR• LM13700 functional replacementApplications:• current-controlled amplifiers• stereo audio amplifiers• current-controlled impedances• current-controlled filters• current-controlled oscillators• multiplexers• VCA• S&H circuits