Product Summary Sheet Applications - MEMS Driver (MicroElectroMechanical Systems) - Piezoelectric Transducer Driver - Optical Crosspoint Switches (using MEMS technology) Package Type: Low Profile MQFP Gullwing (FG) Also available in die form HV256 32-Channel High Voltage Amplifier Array Product Overview: The HV256 is a 32-channel high voltage amplifier array integrated circuit featuring programmable, external current limit on each amplifier. Each channel is configured as a noninverting amplifier. The maximum output voltage swing is 5V below the VPP high voltage supply. The outputs can drive capacitive loads of up to 3000pF. Typical slew rate under a no load condition is 2.0V/µs. BYP-VPP To internal VPP bus BYP-VDD To internal VDD bus BYP-VNN To internal VNN bus RSOURCE RSINK Output Current Sink Limiting for all HVOUT VPP VDD VIN0 + HVOUT0 - The amplifier has an internal closed loop gain of 37dB or 72V/V saving the user from having to use external gain setting resistors. When a DAC voltage of 4.096 is applied to the input of an amplifier an output voltage of 295V will be created. The HV256 operates on a 300V supply and two low voltage supplies, 8.0V and -7.0V. It is designed to operate on minimal power featuring a low quiescent current, while still maintaining a slew rate of 2.0V/µs. To further reduce power consumption, high value gain setting resistors are used for the internal feedback path. The output current for all 32 channels can be adjusted via two external resistors. This allows the user to set the amount of output current during a shorted condition. An integrated diode is also included to help monitor die temperature. Output Current Source Limiting for all HVOUT VNN 71R R VDD VPP VIN1 + HVOUT1 VNN 71R R VDD VPP VIN31 + HVOUT31 71R GND R VNN Anode Cathode Block Diagram 11/20/02 Features: Benefits: 32 independent high voltage amplifiers Saves board space. Output voltage up to 295V Provides adequate movement for an optical MEMS switch 2.0V/µs output slew rate Provides adequate switching time from one line to another Integrated feedback resistors Saves board space. Reduces component count and simplifies board layout. High value internal feedback resistors Minimizes power consumption and dissipation Very low operating current (maximum 25µA per channel) Minimizes power consumption and dissipation Integrated silicon diode for temperature sensing Allows for external temperature compensation or thermal protection Adjustable output current limit Provides output short circuit protection to ground and supply rails HV256 32-Channel High Voltage Amplifier Array Electrical Specifications Device HV256 # of Channels 32 Max. Output Voltage 295V Closed Loop Gain 72V/V Ordering Information / Availability Part Number HV256FG HV256X Package 100 Lead MQFP Die Form Datasheet Now Now Samples Now Now Lead Time 8 - 12 weeks ARO 8 - 12 weeks ARO MEMS Drivers IC Family Part Number HV254 HV256 HV257 Channels 32 32 32 HVOUT 250V 295V 295V Slew Rate 3.0V/µs 2.0V/µs 2.0V/µs Config Amp Only Amp Only Amp + S/H Package 100 MQFP, Die 100 MQFP, Die 100 MQFP, Die Product Contact If you have questions regarding the HV256 or would like to receive samples, contact Supertex Applications at: Telephone: (800) 222-9883 Fax: (408) 222-4895 Email: [email protected] Web: www.supertex.com Supertex Sales: Contact your Supertex Area Sales Office 1235 Bordeaux Drive, Sunnyvale, CA 94089