PA78 APEX | Alldatasheet
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APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com PRELIMINARY TYPICAL APPLICATION The PA78 is ideally suited to driving continuous drop ink jet systems, in both piezo actuation and deflection applications. The deflection amplifier shown above achieves accurate droplet displacement at high speeds to deposit crisp, clear lot code information on product containers. The external compensation networks have been optimized to match the gain of the circuit and the complex impedance of the load. The combination of high voltage and high speed allow repeatable low cost deflec- tion of droplets for high production environments. EXTERNAL CONNECTIONS - EU PACkAGE
FEATURES
- A UNIQUE (Patent Pending) TECHNIQUE FOR VERY LOW QUIESCENT CURRENT < 1 mA
- OVER 350 V/µS SLEW RATE
- WIDE SUPPLY VOLTAGE
- Single Supply: 10V to 350V
- Split Supplies: +/- 10V to +/- 175V
- OUTPUT CURRENT- 150mA cont. ; 200mA Pk
- UP TO 23 WATT DISSIPATION CAPABILITY
- OVER 200 kHz POWER BANDWIDTH
APPLICATIONS
- PIEZOELECTRIC POSITIONING AND ACTUATION
- ELECTROSTATIC DEFLECTION
- DEFORMABLE MIRROR ACTUATORS
- CHEMICAL AND BIOLOGICAL STIMULATORS
DESCRIPTION
The PA78 is a high voltage, high speed Precision IC power op amp with performance and unique features not found previ- ously in any commercially available OpAmp . Novel input stage design of this amplifier provides extremely high slew rates in pulse applications while maintaining low quiescent current of under 1mA. This novel input stage also has the effect of adding variables to the power response and slew rate characteristics of the amplifier. To a lesser degree, there are also input related effects on open loop gain and phase. It is important to note that slew rate for the PA78 is independent of supply current. However the slew rate is a strong function of input voltage amplitude. It should be noted that the package tab needs to be connected to a stable reference such as GND for high slew rates. Please refer to special considerations section for details. The output stages are well protected with user defined current limit although the Safe Operating Area (SOA) must be observed for reliable protection. Proper heatsinking is required for maintaining maximum reliability. External phase compensation provides the user with great flexibility in trading gain, stability and bandwidth. 1"&6 QJO4*1 */ $3 74$3 3' 3*/ 50-0"% @74 3-*. %"$ 3$- %&'-&$5*0/ 1-"5&*/, %301-&54 "1&9 12-PIN SIP PACkAGE STYLE EU LEAD FORM EW 20-PIN PSOP PACkAGE STYLE Dk 74 " $$ " 7065 " *- " 74 " */ " */ " $3 " 1"%, 1*/1401 m EXTERNAL CONNECTIONS - Dk PACkAGE
APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739 PRELIMINARY ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS SUPPLY VOLTAGE, +VS to −VS 350V OUTPUT CURRENT, peak 200mA, within SOA POWER DISSIPATION, internal, DC 23W INPUT VOLTAGE, Differential ±15V INPUT VOLTAGE, Common Mode ±Vs TEMPERATURE, pin solder, 10s 300 TEMPERATURE, junction2 150°C. TEMPERATURE RANGE, storage −55 to 125°C. OPERATING TEMPERATURE, case −40 to 125°C PARAMETER TEST CONDITIONS1 MIN TYP MAX UNITS INPUT OFFSET VOLTAGE 8 25 mV OFFSET VOLTAGE vs. temperature 0 to 125°C (CaseTemperature) −63 µV/°C OFFSET VOLTAGE vs. supply 32 µV/V BIAS CURRENT, initial3 8.5 200 pA BIAS CURRENT vs. supply pA/V OFFSET CURRENT, initial 12 400 pA INPUT RESISTANCE, DC 106 Ω INPUT CAPACITANCE pF COMMON MODE VOLTAGE RANGE, pos. +VS - 2 V COMMON MODE VOLTAGE RANGE, neg. -VS + 5.5 V COMMON MODE REJECTION, DC 90 TBD dB NOISE 1MHz bandwidth, 1kΩRS µV RMS GAIN OPEN LOOP @ 15Hz 89 120 dB GAIN BANDWIDTH PRODUCT @ 1MHz 1 MHz PHASE MARGIN Full temperature range 50 ° OUTPUT VOLTAGE SWING IO = 10mA |VS| − 2 V VOLTAGE SWING IO = 100mA TBD |VS| − 12 V VOLTAGE SWING IO = 150mA |VS| − 10 V CURRENT, continuous, DC 150 mA SETTLING TIME, to 0.1% 2V Step TBD µS POWER BANDWIDTH, 300VP-P +VS = 160V, −VS = -160V 200 kHz POWER SUPPLY VOLTAGE ±10 ±150 ±175 V CURRENT, quiescent ±150V Supply 0.2 0.7 2.5 mA THERMAL RESISTANCE, AC, junction to case5 Full temperature range, f ≥ 60Hz °C/W RESISTANCE, DC, junction to case Full temperature range, f < 60Hz 5.5 °C/W RESISTANCE, junction to air Full temperature range °C/W TEMPERATURE RANGE, case −40 85 °C PA78 NOTES: 1. Unless otherwise noted: TC = 25°C, 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 power dissipation to achieve high MTTF. 3. Doubles for every 10oC of temperature increase. 4. +VS and –VS denote the positive and negative supply voltages of the output stage. 5. Rating applies if output current alternates between both output transistors at a rate faster than 60Hz.
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com PRELIMINARY TYPICAL PERFORMANCE GRAPHS PA78 '3&26&/$: $.33 E# , , , WF4*%&%301 WF4*%&%301 06516570-5"(&48*/( 5&.1&3"563& 5$ $ 108&3%&3"5*/( WF , , '3&26&/$: WF '3&26&/$: ,)[ 4611-:$633&/5 ("*/ 3&4*4503 ų $633&/5-*.*5 *-*. N" $633&/5-*.*5 WF WF 4-&83"5& 7TFD WF 43 WF ("*/ '3&26&/$: ,)[ 06516570-5"(& ("*/ 4-&83"5& 7TFD 4-&83"5& '"-- 4%*7 7%*7 5#% , . . '3&26&/$: )[ 1)"4& 1)"4&3&410/4& , ,, . . '3&26&/$: )[ 01&/-001("*/ "0- E# 01&/-001("*/
APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739 PRELIMINARY POWER SUPPLY BYPASSING Bypass capacitors to power supply terminals +Vs and –Vs must be connected physically close to the pins to prevent lo- cal parasitic oscillation in the output stage of the PA78. Use electrolytic capacitors at least 1μF. Bypass the electrolytic capacitors with high quality ceramic capacitors (X7R) 0.1μF or greater. SUPPLY CURRENT The PA78 features a class A/B driver stage to drive the output MOSFETs and an innovative input stage to achieve very high slew rates. The supply current drawn by the PA78, even with no load, varies with the slew rate of the output signal. STABILITY The PA78 is externally compensated and performance can be tailored to the application. Use the graphs of small signal response and power response as a guide. Due to the innovative design of the PA78, two compensation networks are required. The values of these components should be the same to provide symmetric slew rate characteristics. The compensation capacitor Cc must be rated at 500V working voltage. NPO capacitors are recommended. The compensa- tion networks CcRc must be mounted closely to the amplifier pins x & y and z & w to avoid spurious oscillation. The PA78 may require an external 33 pF capacitor (mini - mum breakdown of 350V) between Cc- and –Vs to prevent oscillations in the falling edge of the output. This capacitor is provided with the evaluation kit. Please refer to EK60U datasheet for details. GENERAL Please read Application Note 1 “General Operating Consid- erations” which covers stability, power 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 complete Application Notes library, Technical Seminar Workbook and Evaluation Kits. SPECIAL CONSIDERATIONS It is very important to realize that in order to achieve high frequency performance the heat sink tab has to be tied to a stable, low impedance reference, i.e. power sup- ply or GND. An AC connection through a 0.1µF capacitor is also sufficient. Internal to the PA78, the heatsink tab is electrically isolated to more than 350V . This may help allay some electrical isolation concerns in tying the heat sink to Vs or GND. CURRENT LIMIT For proper operation, the current limit resistor, Rlim, must be connected as shown in the external connections diagram. For maximum reliability and protection, the resistor should be set as high as possible. The value of the resistor is calcu- lated as follows, with Ilim in A; the maximum practical value is 1500Ω. Rlim = 0.7 / Ilim SAFE OPERATING AREA The MOSFET output stage of the PA78 is not limited by second breakdown considerations as in bipolar output stages. Only thermal considerations and current handling capabilities limit the SOA. The output stage is protected against transient flyback by the parasitic body diodes of the output stage MOS- FET structure. However, for protection against sustained high energy flyback external fast-recovery diodes must be used. OPERATING CONSIDERATIONSPA78 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. PA78U REV 4 FEBRUARY 2006 © 2006 Apex Microtechnology Corp. 5#% 7470 7 065165$633&/5'30. 74PS74 "