HV256 32-Channel High-Voltage Amplifier Array Features General Description Thirty-two Independent High-voltage Amplifiers The HV256 is a 32-channel, high-voltage amplifier array integrated circuit. It operates on a single 300V Operating Voltage high-voltage supply, up to 300V, and two low-voltage 295V Output Voltage supplies, V and V . DD NN 2.2V/s Typical Output Slew Rate The input voltage range is from 0V to 4.096V. The Adjustable Output Current Source Limit ternal closed-loop gain is 72V/V, giving an output in Adjustable Output Current Sink Limit voltage of 295V when 4.096V is applied. Input voltages Internal Closed-loop Gain of 72V/V of up to 5V can be applied but will cause the output to 12 M Feedback Impedance saturate. The maximum output voltage swing is 5V below the V high-voltage supply. The outputs can Layout Ideal for Die Applications PP drive capacitive loads of up to 3000 pF. Applications The maximum output source and sink currents can be justed by using two external resistors. An external ad Microelectromechanical Systems (MEMS) Driver R resistor controls the maximum sourcing SOURCE Piezoelectric Transducer Driver current, and an external R resistor controls the SINK Optical Crosspoint Switches maximum sinking current. The current limit is (Using MEMS Technology) approximately 12.5V divided by the external resistor value. The setting is common for all 32 outputs. A low-voltage silicon junction diode is made available to help monitor the die temperature. Package Type 100-lead MQFP (Top view) 100 1 See Table 3-1 for pin information. 2017 Microchip Technology Inc. DS20005826A-page 1HV256 Functional Block Diagram BYP-VPP To internal VPP bus BYP-VDD To internal VDD bus BYP-VNN To internal VNN bus Output Current Source RSOURCE Limiting for all HV OUT Output Current Sink RSINK Limiting for all HV OUT VPP VDD + VIN0 HV 0 OUT - 71R VNN R VDD VPP + VIN1 HV 1 OUT - 71R VNN R VDD VPP + VIN31 HV 31 OUT - 71R GND R VNN Anode Cathode DS20005826A-page 2 2017 Microchip Technology Inc.