PA96

PA96 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 D PA96

FEATURES

• HIGH VOLTAGE - 300 VOLTS
• HIGH OUTPUT CURRENT – 1.5 AMPS
• 70 WATT DISSIPATION CAPABILITY
• 175 MHz GAIN BANDWIDTH
• 250 V/µ-SECOND SLEW RATE

APPLICATIONS

• PZT DRIVE
• MAGNETIC DEFLECTION
• PROGRAMMABLE POWER SUPPLIES
• 70V LINE AUDIO to 70W

DESCRIPTION

The PA96 is a state of the art high voltage, high current operational amplifier designed to drive resistive, capacitive and inductive loads. For optimum linearity, the output stage is biased for class A/B operation. External compensation provides user flexibility in maximizing bandwidth at any gain setting. The safe operating area (SOA) can be observed for all operating conditions by selection of user programmable current limit. For continuous operation under load, a heatsink of proper rating is required. The hybrid integrated circuit utilizes thick film (cermet) 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 isolation washers voids the warranty. EQUIVALENT CIRCUIT DIAGRAM TYPICAL APPLICATION PZT POSITION CONTROL The MOSFET output stage of the PA96 provides superior SOA performance compared to bipolar output stages where secondary breakdown is a concern. The extended SOA is ideal in applications where the load is highly reactive and may impose simultaneously both high voltage and high cur rent across the output stage transistors. In the figure above a piezo-electric transducer is driven to high currents and high voltages by the PA96. EXTERNAL CONNECTIONS 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 SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS SUPPLY VOLTAGE, +VS to −VS 300V OUTPUT CURRENT, continuous 1.5A, POWER DISSIPATION, internal, DC 70W INPUT VOLTAGE, common mode +VS to −VS INPUT VOLTAGE, differential ±15V TEMPERATURE, pin solder, 10s 300°C TEMPERATURE, junction2 150°C TEMPERATURE RANGE, storage −65 to 150°C OPERATING TEMPERATURE, case −55 to 125°C PARAMETER TEST CONDITIONS1 MIN TYP MAX UNITS INPUT OFFSET VOLTAGE 1 5 mV OFFSET VOLTAGE vs. temperature Full temperature range 20 50 µV/°C OFFSET VOLTAGE vs. supply 20 µV/V BIAS CURRENT, initial3 200 pA BIAS CURRENT vs. supply 0.1 pA/V OFFSET CURRENT, initial 50 pA INPUT RESISTANCE, DC 100 GΩ INPUT CAPACITANCE 4 pF COMMON MODE VOLTAGE RANGE +VS − 13 V COMMON MODE VOLTAGE RANGE −VS + 13 V COMMON MODE REJECTION, DC 92 dB NOISE 100KHz bandwidth, 1kΩ Rs 6 µV RMS GAIN OPEN LOOP @ 15Hz RL= 1kΩ, CC=100pF 96 114 dB GAIN BANDWIDTH PRODUCT @ 1MHz VS = 150V, -VS = 150V, 100 175 MHz A = -100, RF = 100K PHASE MARGIN Full temperature range, using 60 ° recommended CC for gain. PBW 250V p-p output, 100Ω, 100 KHz +150V Supplies, Cc = 0pf OUTPUT VOLTAGE SWING IO = 1.5A +VS − 12 +V S − 5.6 V VOLTAGE SWING IO = −1.5A −VS + 12 −V S + 10 V VOLTAGE SWING IO = 0.1A +VS − 8 V VOLTAGE SWING IO = −0.1A −VS + 8 V CURRENT, continuous, DC 1.5 A SLEW RATE AV = −100, ±150V Supplies, 250Ω load 200 250 V/µS negative slope, Positiveslope much faster SETTLING TIME, to 0.1% AV = −100, 1V Step, CC = 0pF 2 µS RESISTANCE, open loop DC, 1A Load 7 10 Ω THERMAL RESISTANCE, AC Junction to Case Full temperature range. f > 60Hz 1.2 1.3 °C/W RESISTANCE, DC Junction to Case Full temperature range. f < 60Hz 1.6 1.8 °C/W RESISTANCE, Junction to Ambient 30 °C/W POWER SUPPLY VOLTAGE ±15 ±100 ±150 V CURRENT, Quiescent total 25 30 35 mA CURRENT, Quiescent output stage only 10 mA PA96 NOTES: * The specification of PA08A is identical to the specification for PA08 in applicable column to the left. 1. Long term operation at the maximum junction temperature will result in reduced product life. Derate power dissipation to achieve high MTTF. 2. The power supply voltage specified under typical (TYP) applies unless otherwise noted. 3. Doubles for every 10 oC of temperature increase. 4. +V S and –VS denote the positive and negative supply rail respectively. 5. Rating applies only if output current alternates between both output transistors at a rate faster than 60Hz. 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 D PA96 TYPICAL PERFORMANCE GRAPHS PA96

APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739 OPERATING CONSIDERATIONSPA96 GENERAL Please read Application Note 1 “General Operating Con - siderations” which covers stability, supplies, heat sinking, mounting, current limit, SOA interpretation, and specification interpretation. Visit www.apexmicrotech.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit, heat sink selection, Apex’s Application Notes library, Technical Seminar Workbook, and Evaluation Kits. SPECIAL PRECAUTIONS The PA96 operates with up 300V rail to rail voltage, and delivers amperes of current. Precautions should be taken for the safety of the user and the amplifier. Although the non-operating common mode input range is rail to rail, the differential input voltage must not exceed ±15 V. Therefore; if the feedback ratio is less than 10, even if caused by disconnecting a signal source , typical power turn on transients can destroy the amplifier. Similarly in a voltage follower application a large differential transient can be generated if the slew rate of the input is greater than that of the voltage follower. Therefore it is prudent to clamp the input with series back to back diodes as shown below. If experimentally optimizing the compensation capacitor, turn off the supplies and let them bleed to low voltage before installing each new value. Otherwise internal current pulses of up to 3 amps can be induced. Also, do you want your fingers around 300V? Essentially the full rail to rail power supply voltage may be applied to the compensation capacitor. A 400V COG or Mica capacitor is recommended. POWER BANDWIDTH The power bandwidth is 1/(π x the negative edge slew time). The slew time is determined by the compensation capacitor, load, and internal device capacitance; it is independent of closed loop gain. The uncompensated power bandwidth is typically 100kHz for a 250Vp-p output signal into 100 Ω. It typi- cally increases to above 300KHz with no load. COMPENSATION TABLE The following table tabulates recommended compensation capacitor values vs. gain. These values will typically result in less than 2% overshoot and a -3db small signal bandwidth of greater than 1MHz, except under operating conditions where uncompensated gain bandwidth is too low to support a 1MHz bandwidth. (See gain bandwidth vs. Plus power supply curves). Note that other factors such as capacitance in parallel with the feedback resistor may reduce circuit bandwidth from that determined from the gain bandwidth curve. Cc Inverting Gain From To 150pf 1 2 51pf 2 5 33pf 5 10 22pf 10 20 10pf 20 50 5pf 50 100 None 100 up Cc Non-Inverting Gain From To 330 pf 1 2 150pf 2 3 51pf 3 6 33pf 6 10 22pf 10 20 10pf 20 50 5pf 50 100 None 100 up CURRENT LIMIT For proper operation the current limit resistor, Rcl, must be connected as shown in the external connections diagram. The minimum value is 0.2Ω, with a maximum practical value of 100Ω. For optimum reliability the resistor should be set as high as possible. The value is calculated as I L = 0.68V/Rcl. Note that the 0.68V is reduced by 2mV every °C rise in temperature. Also note that the current limit can be set such that the SOA is exceeded on a continuous basis. As an example if the current limit was set at 1.5A and the supply was at 150V, a short to ground would produce 225 watts internal dissipation, greatly exceeding the 83 watt steady state SOA rating. Under some conditions of load and compensation the am- plifier may oscillate at a low level when current limit is active, even though the amplifier is stable otherwise. The current will be limited to the programmed value in this situation. To minimize such occurrences, use a non-reactive resistor to program current limit. This data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. All specifications are subject to change without notice. PA96U REV B DECEMBER 2005 © 2005 Apex Microtechnology Corp.