LSP2908

Advance Data Sheet September 2001 LSP2908 8-Channel, High-Voltage Driver Features I I I Eight amplifier channels in one package Outputs from –298 V to +160 V per channel Programmable output current limit (100 µA to 500 µA) Variable voltage gain set by external resistors condition that |VHP – VHN| ≤ 300 V. Voltage gain is set by external resistors. Each amplifier can output up to 500 µA, ideal for deflection and control of optical MEMS mirrors. Output current limit is programmed by an external resistor. Additionally, careful attention is paid to minimizing offset drift over temperature. The LSP2908 requires one negative high-voltage power supply (VHN) and one positive low-voltage power supply (VLP). For positive output voltage applications, one positive high-voltage power supply (VHP) is required. Corresponding to the eight channels are the eight inverting input pins, –INx (x = 1, 2, . . . , 8), and the corresponding eight output pins, OUTPUTx (x = 1, 2, . . . , 8). Figure 1 is the internal functional block diagram. +IN is the noninverting input for all eight amplifiers. All the amplifiers share the same noninverting input. +IN should be connected to GND. The IBIAS pin will set the current limit ((100 µA to 500 µA) ± 20%) for the amplifiers by connecting it to an external resistor Rib. The LSP2908 is available in a leaded surfacemount 44-pin MQFP package. I Applications I I Optical crosspoint switches Optical microelectromechanical systems (MEMS) components Description ...