THAT2181B ETC1 [List of Unclassifed Manufacturers], THAT2181B Datasheet
THAT2181B
Related parts for THAT2181B
THAT2181B Summary of contents
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FEATURES · Wide Dynamic Range: >120 dB · Wide Gain Range: >130 dB · Exponential (dB) Gain Control · Low Distortion: ~0.0025% (typical 2181A) ~0.005% ...
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Page 2 Absolute -Maximum Ratings (T Positive Supply Voltage ( Negative Supply Voltage ( Supply Current ( Max Recommended Operating Conditions Parameter Symbol Positive Supply Voltage V ...
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Rev 01 Electrical Characteristics (Cont'd.) Parameter Symbol Total Harmonic Distortion THD dBV gain +10 dBV, -15 dB gain dBV, +15 dB gain +10 dBV, ...
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Page 4 The THAT 2181 Series VCAs are designed for high performance in audio-frequency applications requiring exponential gain control, low distortion, wide dynamic range and low control-voltage feedthrough. These parts control gain by converting an input current signal to a ...
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Rev 01 ship is temperature dependent. Therefore, the gain of any log-antilog VCA depends on its temperature. Figure 8 shows the effect of temperature on the nega- tive control port. (The positive control port behaves in the same manner.) ...
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Page 6 Audio Performance The 2181-Series VCA design, fabrication and testing ensure extremely good audio performance when used as recommended. The 2181 maintains low distortion over a wide range of gain, cut and signal levels. Figures 10 through 12 show ...
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Rev 01 DC Coupling The quiescent dc voltage level at the input (the input offset voltage) is approximately 0 V, but many gen- eral-purpose opamps, this is not well controlled. Any dc input currents will cause dc ...
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Page 8 There is no reason why both control ports cannot be used simultaneously. Symmetry The SYM pin (pin 4) is actually a sort of additional positive-sense control port provided to allow V mismatches in the core transistors ...
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Rev 01 To avoid excessive noise, one must take care to use quiet electronics throughout the control-voltage circuitry. One useful technique is to process control voltages at a multiple of the eventual control constant (e.g., 61 mV/dB — ten ...
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Page 10 THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com Notes THAT2181 Series IC VCAs ...