PA88 APEX | Alldatasheet

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Technical content

APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com

FEATURES

  • HIGH VOLTAGE — 450V (±225V)
  • LOW QUIESCENT CURRENT — 2mA
  • HIGH OUTPUT CURRENT — 100mA
  • PROGRAMMABLE CURRENT LIMIT
  • LOW BIAS CURRENT — FET Input

APPLICATIONS

  • PIEZOELECTRIC POSITIONING
  • HIGH VOLTAGE INSTRUMENTATION
  • ELECTROSTATIC TRANSDUCERS
  • PROGRAMMABLE POWER SUPPLIES UP TO 440V

DESCRIPTION

The PA88 is a high voltage, low quiescent current MOS - FET operational amplifier designed for output currents up to 100mA. Output voltages can swing up to ±215V with a dual supply and up to +440 volts with a single supply. The safe operating area (SOA) has no second breakdown limitations and can be observed with all types of loads by choosing an appropriate current limiting resistor. High accuracy is achieved with a cascode input circuit configuration. All internal biasing is referenced to a bootstrapped zener-MOSFET current source. As a result, the PA88 features an unprecedented supply range and excellent supply rejection. The MOSFET output stage is biased on for linear operation. External compensation provides user flexibility. This hybrid circuit utilizes beryllia (BeO) substrates, thick film resistors, ceramic capacitors and semiconductor chips to maximize reliability, minimize size and give top performance. Ultrasonically bonded aluminum wires provide reliable inter connections at all operating temperatures. The 8-pin TO-3 package is hermetically sealed and electrically isolated. The use of compressible thermal isolation washers and/or improper mounting torque will void the product warranty. Please see “General Operating Considerations”. EQUIVALENT SCHEMATIC TYPICAL APPLICATION LOW POWER, PIEZOELECTRIC POSITIONING Piezo positioning may be applied to the focusing of segmented mirror systems. The composite mirror may be composed of hundreds of elements, each requiring focusing under computer control. In such complex systems the PA88’s advantage of low quiescent power consumption reduces the costs of power supplies and cooling, while providing the interface between the computer and the high voltage drive to the piezo positioners. EXTERNAL CONNECTIONS PATENTED 8-PIN TO-3 PACKAGE STYLE CE

APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739 ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS SUPPLY VOLTAGE, +VS to –VS 450V OUTPUT CURRENT, source, sink See SOA POWER DISSIPATION, continuous @ TC = 25°C 15W INPUT VOLTAGE, differential ±25V INPUT VOLTAGE, common mode ±VS TEMPERATURE, pin solder - 10s max 300°C TEMPERATURE, junction2 150°C TEMPERATURE, storage –65 to +150°C OPERATING TEMPERATURE RANGE, case –55 to +125°C PA88 • PA88A SPECIFICATIONS PA88 PA88A PARAMETER TEST CONDITIONS 1 MIN TYP MAX MIN TYP MAX UNITS INPUT OFFSET VOLTAGE, initial .5 2 .25 .5 mV OFFSET VOLTAGE, vs. temperature Full temperature range 10 30 5 10 µV/°C OFFSET VOLTAGE, vs. supply 1 5 * * µV/V OFFSET VOLTAGE, vs. time 75 * µV/√kh BIAS CURRENT, initial3 5 50 3 10 pA BIAS CURRENT, vs. supply .01 * pA/V OFFSET CURRENT, initial3 2.5 100 3 20 pA INPUT IMPEDANCE, DC 10 11 * Ω INPUT CAPACITANCE 4 * pF COMMON MODE VOLTAGE RANGE4 ±VS–15 * V COMMON MODE REJECTION, DC V CM = ±90V 90 110 * * dB NOISE 100kHz BW, RS = 1KΩ, CC = 15pf 2 * µVrms GAIN OPEN LOOP, @ 15Hz R L = 2KΩ, CC = OPEN 96 111 * * dB GAIN BANDWIDTH PRODUCT at 1MHz R L = 2KΩ, CC = 15pf, RC = 100Ω 2.1 * MHz POWER BANDWIDTH RL = 2KΩ, CC = 15pf, RC = 100Ω 6 * kHz PHASE MARGIN Full temperature range 60 * ° OUTPUT VOLTAGE SWING4 Full temp. range, IO = ±75mA ±V S–16 ±V S–14 * * V VOLTAGE SWING4 Full temp. range, IO = ±20mA ±V S–10 ±V S–5.2 * * V CURRENT, continuous TC = 85°C ±100 * mA SLEW RATE, AV = 20 CC = 15pf, RC = 100Ω 8 * V/µs SLEW RATE, AV = 100 CC = OPEN 30 * V/µs CAPACITIVE LOAD, AV = +1 Full temperature range 470 * pf SETTLING TIME to .1% CC = 15pf, RC = 100Ω, 2V step 10 * µs RESISTANCE, no load RCL = 0 100 * Ω POWER SUPPLY VOLTAGE6 See note 6 ±15 ±200 ±225 * * * V CURRENT, quiescent, 1.7 2 * * mA THERMAL RESISTANCE, AC, junction to case5 Full temperature range, F > 60Hz 5.0 * °C/W RESISTANCE, DC, junction to case Full temperature range, F < 60Hz 8.3 * °C/W RESISTANCE, junction to air Full temperature range 30 * °C/W TEMPERATURE RANGE, case Meets full range specifications –25 +85 * * °C NOTES: * The specification of PA88A is identical to the specification for PA88 in applicable column to the left. 1. Unless otherwise noted: T C = 25°C, compensation = CC = 68pF, RC = 100Ω. DC input specifications are ± value given. Power supply voltage is typical rating. 2. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. 3. Doubles for every 10°C of temperature increase. 4. +V S and –VS denote the positive and negative power supply rail respectively. 5. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. 6. Derate max supply rating .625 V/°C below 25°C case. No derating needed above 25°C case. The PA88 is constructed from MOSFET transistors. ESD handling procedures must be observed. The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or subject to temperatures in excess of 850°C to avoid generating toxic fumes. CAUTION

APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com TYPICAL PERFORMANCE GRAPHS PA88 • PA88A

Workbook; and Evaluation Kits.

  1. The current handling capability of the MOSFET geometry
  2. The junction temperature of the output MOSFETs.

NOTE: The output stage is protected against transient flyback. external fast-recovery diodes should be used. power-off polarity reversal as well as line regulation. and physically as close to the amplifier as possible. FIGURE 2. OVERVOLTAGE PROTECTION PA88U REV L FEBRUARY 2005 © 2005 Apex Microtechnology Corp.