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PIEZOELECTRIC POSITIONING AND ACTUATION
ELECTROSTATIC DEFLECTION
DEFORMABLE MIRROR ACTUATORS
CHEMICAL AND BIOLOGICAL STIMULATORS
DESCRIPTION
The PA79 is a dual high voltage, high speed Precision IC
power op amp with performance and unique features not
found previously in any commercially available OpAmp. This
approach provides a cost-effective, high density solution to
applications where multiple amplifiers are required.
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 PA79 is
independent of supply current. However the slew rate is a
strong function of input voltage amplitude.
The output stages are well protected with user defined
current limit although the Safe Operating Area (SOA) must
be observed for reliable protection. Proper heat sinking is
required for maintaining maximum reliability. External phase
compensation provides the user with great flexibility in trading
gain, stability and bandwidth.
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The typical application diagram shows a bridge connection
of the two amplifiers inside a dual PA79 and provides output
voltage swing twice that of one amplifier. Two possible situ-
ations where there is an advantage would be in applications
with low supply voltages, or applications that operate amplifiers
near their maximum voltage ratings in which a single amplifier
could not provide sufficient drive. The bridge connection also
effectively doubles the slew rate, and non-linearity becomes
symmetrical reducing second harmonic distortion in compari-
son to a single amplifier circuit.
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20-PIN PSOP
PACKAGE STYLE DK
EXTERNAL CONNECTIONS - DK PACKAGE
NOTES:
1. The package heat slug needs to be connected to a stable reference such as gnd
for high slew rates. Please refer to special considerations section for details.
2. Supply bypassing required for 鈥揤s and +Vs.
3. For Cc and Rc values refer to power supply biasing section.
4. Dimple and ESD triangle denotes pin 1.
APEX MICROTECHNOLOGY CORPORATION 鈥?TELEPHONE (520) 690-8600 鈥?FAX (520) 888-3329 鈥?ORDERS (520) 690-8601 鈥?EMAIL prodlit@apexmicrotech.com
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