that2155 ETC-unknow, that2155 Datasheet
that2155
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that2155 Summary of contents
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FEATURES • Wide Dynamic Range: >116 dB • Wide Gain Range: >130 dB • Exponential (dB) Gain Control • Low Distortion: (0.008 ...
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Page 2 SPECIFICATIONS Absolute-Maximum Ratings (T Positive Supply Voltage ( Negative Supply Voltage ( Supply Current ( Recommended Operating Conditions Parameter Symbol Conditions Positive Supply Voltage V CC Negative Supply Voltage V EE Bias ...
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Rev. 10/25/96 Electrical Characteristics (Cont’d.) Parameter Symbol Conditions Total Harmonic Distortion THD 180 A, 1 kHz IN OUT 0 dB gain 15 dB gain 150 A, 1 kHz IN OUT 0 dB ...
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Page 4 The THAT 2150 Series VCAs are designed for high performance in audio-frequency applications requiring exponential gain control, low distortion, wide dynamic range and low dc bias modulation. These parts control gain by converting an input current signal to ...
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Rev. 10/25/ 0.122 When pin the current ratio is unity. When pin +122 mV, the output current (Q4 times (20 dB) less than the ...
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Page 6 port, with an opposite sense of control from that at pin 3. To use this port, both pins must be driven with the control voltage, while a small differential voltage is accommodated between the two pins. (Figure 14, ...
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Rev. 10/25/96 Figure 10. 1kHz THD+Noise Vs. Input, -15 dB Gain Figure 12. 1kHz THD+Noise Vs. Input, +15 dB Gain Input As mentioned above, input and output signals are currents, not voltages. While this often causes some conceptual difficulty for ...
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Page 8 fore, capacitive coupling is almost mandatory for qual- ity audio applications. Choose a capacitor which will give acceptable low frequency performance for the ap- plication. Multiple signals may be summed by multiple resis- tors, just as with an ...
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Rev. 10/25/96 symmetry voltage (< 2.5 mV) to correct for V matches within the VCA IC. For this purpose, the 2150 series devices were designed for optimum performance with an impedance of approximately 50 trim pot is used to adjust ...
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Page 10 voltage-control circuitry. The 2150 Series VCAs act like double-balanced multipliers: when no signal is present at the signal input, noise at the control input is re- jected. So, when measuring noise (in the absence of signal — as ...