SSM2018

OBSOLETE 00345-001 Data Sheet 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 Low external parts count Low cost GENERAL DESCRIPTION The SSM2018 represents the continuing evolution of the Frey Operational Voltage Controlled Element (OVCE) topology that permits flexibility in the design of high performance volume control systems. The SSM2018 is laser trimmed for gain core symmetry and offset. As a result, the SSM2018 is the first professional audio quality VCA to offer trimless operation. Due to careful gain core layout, the SSM2018 combines the low noise of Class AB topologies with the low distortion of Class A circuits to offer an unprecedented level of sonic transparency. Trimless Voltage Controlled Amplifier SSM2018 FUNCTIONAL BLOCK DIAGRAM SSM2018 VC G +IN GAIN CORE –IN 1–G VG –IG V1–G –I1–G Figure 1. Additional features include differential inputs, a 140 dB (−100 dB to +40 dB) gain range, and a high impedance control port. The SSM2018 provides an internal current-to-voltage converter. Thus, no external active components are required. This device is offered in 16-lead, plastic DIP package and guaranteed for operation over the extended industrial temperature range of −40°C to +85°C. Rev. C Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no resp...