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SSM2018TS Datasheet(PDF) 1 Page - Analog Devices |
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SSM2018TS Datasheet(HTML) 1 Page - Analog Devices |
1 / 16 page FUNCTIONAL BLOCK DIAGRAMS GENERAL DESCRIPTION The SSM2018T and SSM2118T represent continuing evolu- tion of the Frey Operational Voltage Controlled Element (OVCE) topology that permits flexibility in the design of high performance volume control systems. Voltage (SSM2018T) and differential current (SSM2118T) output versions are of- fered, both laser-trimmed for gain core symmetry and offset. As a result, the SSM2018T is the first professional audio quality VCA to offer trimless operation. The SSM2118T is ideal for low noise summing in large VCA based systems. Due to careful gain core layout, the SSM2018T/SSM2118T combine the low noise of Class AB topologies with the low dis- tortion of Class A circuits to offer an unprecedented level of sonic transparency. Additional features include differential in- puts, a 140 dB gain range, and a high impedance control port. The SSM2018T provides an internal current-to-voltage con- verter; thus no external active components are required. The SSM2118T has fully differential current outputs that permit high noise-immunity summing of multiple channels. Both devices are offered in 16-pin plastic DIP and SOIC pack- ages and guaranteed for operation over the extended industrial temperature range of –40 °C to +85°C. FEATURES 117 dB Dynamic Range 0.006% Typical THD+N (@ 1 kHz, Unity Gain) 140 dB Gain Range No External Trimming Required Differential Inputs Complementary Gain Outputs Buffered Control Port I–V Converter On-Chip (SSM2018T) Differential Current Outputs (SSM2118T) Low External Parts Count Low Cost Trimless Voltage Controlled Amplifiers SSM2018T/SSM2118T 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 otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 REV. A a VC –IN +IN VG V1–G –IG –I1–G GAIN CORE G 1–G SSM-2018T VC –IN +IN +IG V1–G –IG –I1–G GAIN CORE G 1–G SSM-2118T OBSOLETE |
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