PA343DF Apex Microtechnology

PA343PA343 PA343 High Voltage Power Operational Amplifier DESCRIPTION FEATURES The PA343 is a dual high voltage monolithic MOSFET RoHS COMPLIANT operational amplifier achievin g performance features SURFACE MOUNT PACKAGE previously found only in hybrid designs while increas- MONOLITHIC MOS TECHNOLOGY ing relia bility. This approach provides a cost-effective LOW COST solution to applications where multiple amplifiers are HIGH VOLTAGE OPERATION 350V required. Inputs are protected from excessive common LOW QUIESCENT CURRENT TYP. 2.2mA mode and differential mode voltages. The safe operat- NO SECOND BREAKDOWN ing area (SOA) has no secondary breakdown limita- HIGH OUTPUT CURRENT 120 mA PEAK tions and can be observed with all type loads by choos- ing an appropriate current limiting resistor. External compensation provides the user flexibility in choosing APPLICATIONS optimum gain and bandwidth for the application. TELEPHONE RING GENERATOR PIEZO ELECTRIC POSITIONING The PA343DF is packaged in a 24 pin PSOP (JEDEC ELECTROSTATIC TRANSDUCER & MO-166) package. The heatslug of the PA343DF DEFLECTION package is isolated in excess of full supply voltage. DEFORMABLE MIRROR FOCUSING FIGURE 1: Equivalent Schematic (one of 2 Amplifiers) +V S Q1 Q2 Q3 C 1 C Q4 C 2 C I LIM +IN Q6 Q5 Q7 Q8 -IN OUT Q10 Q9 D4 D1 Q13 D2 D3 Q11 Q12 Q14 Q15 D5 -V S Copyright Apex Microtechnology, Inc. 2014 JAN 2014 www.apexanalog.com PA343U 1 (All Rights Reserved) PA343U REV DPA343 FIGURE 2. External Connections. -Vsa * +Vsa 1 24 NC NC ILa NC COMPa +INa + R CL COMPa A -INa - C C NC OUTa OUTb NC COMPb -INb R B CL +INb COMPb C C ILb NC * -Vsb +Vsb For C values, see graph on page 4. C 24-pin PSOP Note: C must be rated for full supply voltage. C PACKAGE STYLE DF * Supply bypassing required. See general Operating Consid- erations. TYPICAL APPLICATION A single PA343 amplifier operates as a bridge driver for a piezo transducer providing a low cost 660 volt total drive capability. The R C network serves to raise the apparent gain of A2 at high frequencies. If R is set equal to R the N N N amplifiers can be compensated identically and will have matching bandwidths. See application note 20 for more details. R 20R 20R 20R V IN +175 +175 10pF 10pF A B PA343 PA343 R R R N CL CL PIEZO 47 47 TRANSDUCER C N 175 175 FIGURE 3. Low Cost 660v Piezo Drive p-p 2 PA343U * + - *