CEM Chips are back and with improved performance! Alfa AS series IC's are great for drop in replacement/substitution parts or for new designing!
|AS3310/AS3310D - Voltage Controlled Envelope Generator (ADSR)|
The AS3310 is a self-contained, precision ADSR type of envelope generator intended for electronic music and other sound generation applications. Attack, decay and release times are exponentially voltage controllable over a wide range, and the sustain level is linearly voltage controllable from 0 to 100% of the peak voltage Vp. All four control Inputs are Isolated from the rest of the circuitry so that the control pins of tracking units may be simply tied together.
|AS3320/AS3320F - Voltage controlled filter (VCF)|
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 frequency over greater than a ten octave range with little control voltage feedthrough. 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 better signal -to-noise ratio and generates its low distortion predominantly in the second harmonic. The device includes a minus two volt regulator to ensure low power dissipation and consequent low warm-up drift.
- improved CEM3320 pin-to-pin compatible – bandwidth till 800 kHz
- voltage controllable frequency - 12 octave range
- voltage controllable resonance - from zero to oscillation
- accurate exponential frequency scale
- accurate linear resonance scale
- low control voltage feed-through -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
|AS3330/AS3330F- Dual Voltage Controlled Amplifier (VCA)|
The AS 3330 is a dual, high performance, voltage controlled amplifier intended for electronic musical instrument and professional audio applications. Each amplifier includes complete circuitry for simultaneous linear and exponential control of gain. In addition, the operating point of the amplifiers may be set anywhere from Class В to Class A, allowing the user to optimize those parameters critical to the particular appli¬cation. Also featured are virtual ground summing nodes for both the signal and linear control inputs, so that signal and control mixing may be accomplished within the device itself. Finally, the VCA outputs are signal currents, allowing the device to be conveniently used in two-pole voltage controlled filters, as well as dual voltage controlled amplifiers.
- Two Independent Voltage Controlled Amplifiers in a Single Package
- Simultaneous Linear and Exponential Control Inputs
- Wide Control Range: 120dB min.
- Very Accurate Control Scales for Excellent Gain Tracking
- Exceptionally Low Control Voltage Feedthrough: better than -80dB
- Low Distortion: Less than 0.1%
- Exceptionally Low Noise: Better than -100dB
- Class B to Class A Operation
- Summing Signal and Linear Control Inputs
- Current Outputs for Ease of Use in Voltage Controlled 2-Pole Filters
- Can Be Used in VCO and VCF Control Paths Without Causing Shift
- ±15 Volt Supplies
- Improved CEM 3330 replacement.
|AS3340-HYB - Voltage Controlled Oscillators ( VCO )|
AS3340-HYB – voltage controlled oscillator proposed for circuits where requirements on influence of PWM signal on frequency are strict. AS3340-HYB is based on AS3345F in QFN-24 with addition of PWM comparator based on similar schematics as internal comparator of AS3340. Such solution greatly minimize frequency modulation by PWM control circuit but allows PWM output be compatible with AS3340. Current consumption from negative and positive source is increased on 1 mA and these issue must be taken into account . All other electrical parameters - according to datasheet AS3340.pdf. For improved stability of frequency Vee= -5 - -6V recommended
|AS3340/AS3340D/AS3345/AS3345F - Voltage Controlled Oscillators ( VCO )|
TThe 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 mul¬tiple control voltages to be mixed within the device itself.
- CEM 3340 / CEM3345 replacement
|AS3350 - Dual Voltage Controlled State Variable Filter|
|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 bandpass 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.|
| 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 ±16V
|AS3360/AS3360D - Dual Voltage Controled Amplifier ( VCA )|
The AS3360 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. 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.
- Two Independent VCAs in a Single 14 Pin package
|AS3310||Voltage Controlled Envelope Generator. CEM3310 pin-to-pin compatible|
|AS3320||Voltage controlled filter. Improved CEM3320 pin-to-pin compatible|
|AS3330||Dual Voltage Controled Amplifier (VCA). Improved CEM3330 replacement.|
|AS3340, AS3345||Voltage Controlled Oscillator (VCO). CEM3340, CEM3345 pin-to-pin compatible|
Voltage Controlled Oscillator (VCO). CEM3340, CEM3345 pin-to-pin compatible (Improved PWM)
Dual Voltage Controlled State Variable Filter
|AS3360||Dual Voltage Controled Amplifier (VCA). CEM3360 pin-to-pin compatible|