a Low Cost QuadVoltage Controlled AmplifierSSM2164FEATURESFUNCTIONAL BLOCK DIAGRAMFour High Performance VCAs in a Single Package 0.02% THD No External TrimmingVC120 dB Gain Range 0.07 dB Gain Matching (Unity Gain) Class A or AB OperationIINVCA1IIOUTAPPLICATIONS Remote, Automatic, or Computer Volume Controls Automotive Volume/Balance/FadersVAudio MixersCCompressor/Limiters/Compandors Noise Reduction Systems Automatic Gain ControlsIINVCA2IIOUTVoltage Controlled Filters Spatial Sound Processors Effects ProcessorsVCGENERAL DESCRIPTION The SSM2164 contains four independent voltage controlled IINVCA3IIOUT amplifiers (VCAs) in a single package. High performance (100 dB dynamic range, 0.02% THD) is provided at a very low cost-per-VCA, resulting in excellent value for cost sensitive gain VC control applications. Each VCA offers current input and output for maximum design flexibility, and a ground referenced –33 mV/dB control port. All channels are closely matched to within 0.07 dB at unity gain, IVCA4IINIOUT and 0.24 dB at 40 dB of attenuation. A 120 dB gain range is possible. A single resistor tailors operation between full Class A and AB POWER SUPPLYAND BIASING CIRCUITRY modes. The pinout allows upgrading of SSM2024 designs with minimal additional circuitry. The SSM2164 will operate over a wide supply voltage range of V+GNDV–MODE ±4 V to ±18 V. Available in 16-pin P-DIP and SOIC packages, the device is guaranteed for operation over the extended industrial temperature range of –40°C to +85°C. OBSOLETE REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. otherwise under any patent or patent rights of Analog Devices. Tel: 617/329-4700Fax: 617/326-8703
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