Apex PA88, PA88A Datasheet
F
R
PA88
IN
R
PIEZO DRIVE
S
–V
S
+V
OUT
V
C
C
COMPUTER
FOCUS
COMMAND
VOLTAGE
MICROTECHNOLOGY
HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739
FEATURES
• HIGH VOLTAGE — 450V (±225V)
• LOW QUIESCENT CURRENT — 2mA
• HIGH OUTPUT CURRENT — 100mA
• PROGRAMMABLE CURRENT LIMIT
• LOW BIAS CURRENT — FET Input
HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS
PA88 • PA88A
APPLICATIONS
PATENTED
• PIEZOELECTRIC POSITIONING
• HIGH VOLTAGE INSTRUMENTATION
• ELECTROSTATIC TRANSDUCERS
• PROGRAMMABLE POWER SUPPLIES UP TO 440V
TYPICAL APPLICATION
DESCRIPTION
The PA88 is a high voltage, low quiescent current MOSFET
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 interconnections 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
3
+V
Q18
CL
2
1
OUT
–V
6
S
S
D1
Q10B
Q4
+ IN
45
D19
COMP
Q16
D2
87
Q11
Q8
Q9
Q12
Q17
Q1 Q2
– IN
Q6 Q7
Q10A
Q13
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
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
R
+IN
–IN
CL
+Vs
3
4
TOP VIEW
5
6
–Vs
COMP
CL
2
1
8
7
R
C
PHASE COMPENSATION
GAIN
OUT
COMP
1
10
20
100
C
C
CC RATED FOR FULL
SUPPLY VOLTAGE
C
C
68pf
33pf
15pf
3.3pf
R
=
CL
100
100
100
.7
I
LIM
R
C
Ω
Ω
Ω
—
PA88 • PA88A
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, +VS to –V
OUTPUT CURRENT, source, sink See SOA
S
450V
POWER DISSIPATION, continuous @ TC = 25°C 15W
INPUT VOLTAGE, differential ±25V
INPUT VOLTAGE, common mode ±V
TEMPERATURE, pin solder - 10s max 300°C
TEMPERATURE, junction
2
S
150°C
TEMPERATURE, storage –65 to +150°C
OPERATING TEMPERATURE RANGE, case –55 to +125°C
SPECIFICATIONS
PARAMETER TEST CONDITIONS
PA88
1
MIN TYP MAX MIN TYP MAX UNITS
PA88A
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, initial
BIAS CURRENT, vs. supply .01 * pA/V
OFFSET CURRENT, initial
INPUT IMPEDANCE, DC 10
INPUT CAPACITANCE 4 * pF
COMMON MODE VOLTAGE RANGE
3
3
4
±VS–12 * V
550 310pA
2.5 100 3 20 pA
11
* Ω
COMMON MODE REJECTION, DC VCM = ±90V 90 110 * * dB
NOISE 100kHz BW, RS = 1KΩ, CC = 15pf 2 * µVrms
GAIN
OPEN LOOP, @ 15Hz RL = 2KΩ, CC = OPEN 96 111 * * dB
GAIN BANDWIDTH PRODUCT at 1MHz RL = 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 SWING
VOLTAGE SWING
VOLTAGE SWING
4
4
4
IO = ±100mA ±VS–12 ±VS–9.8 * * V
Full temp. range, IO = ±75mA ±VS–8.5 ±VS–7.5 * * V
Full temp. range, IO = ±20mA ±VS–8.0 ±VS–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
VOLTAGE
6
See note 6 ±15 ±200 ±225 * * * V
CURRENT, quiescent, 1.7 2 * * mA
THERMAL
RESISTANCE, AC, junction to case
5
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: TC = 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. +VS 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.
CAUTION
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.
APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
Loading...