(2 PCS) PJ324CD PROMAX-JOHNTON Quad Low Power Operational Amplifiers
Tax included.
THIS LISTING IS FOR (2 PCS) OF PJ324CD BY PROMAX-JOHNTON
Quad Low Power Operational Amplifiers
The PJ324 series are low-cost , quad operational amplifiers
with true differential inputs. These have several distinct
advantage over standard operational amplifier types in single
supply applications. The quad amplifiers can operate at supply
voltages as low as 3.0V or as high as 32V with very low
quiescent currents and eliminat the necessity for external
biasing components in many
applications. The output voltage range also includes the
negative power supply voltage.
FEATURES
• Short circuited protected outputs
• True differential input stage
• Single supply operation:3.0V to 32V
• Low input bias currents:100nA Max
• Four amplifiers per package
• Internally compensated
• Common mode range extends to negative supply
• Industry standard pinouts
• ESD clamps on the inputs increase raggedness without
affecting device operation
CIRCUIT DESCRIPTION
The PJ324 series is made using four internally
compensated, two-stage operational amplifiers. The
first stage of each consists of differential input
devices Q20 and Q18 with input buffer transistors
Q21 and Q17 and the differential to single ended
converter Q3 and Q4 . The first stage performs not
only the first stage gain function but also performs
the level shifting and transconductance reduction
functions. By reducing the transconductance a smaller
compensation capacitor (only 5.0pF ) can be
employed , thus saving chip area. The
transconductance reduction is accomplished by
splitting the collectors of Q20 and Q18 . Another
feature of this input stage is that the input common
mode range can include the negative supply or ground,
in single supply operation without saturating either
the input devices or the differential to single-ended
converter . The second stage consists of a standed
current source load amplifier stage.
LARGE SIGNAL VOLTAGE FOLLOWER RESPONSE
Each amplifier is biased from an internal voltage
regulator which has a low temperature coefficient thus
giving each amplifier good temperature characteristics
as will as excellent power supply rejection.
Quad Low Power Operational Amplifiers
The PJ324 series are low-cost , quad operational amplifiers
with true differential inputs. These have several distinct
advantage over standard operational amplifier types in single
supply applications. The quad amplifiers can operate at supply
voltages as low as 3.0V or as high as 32V with very low
quiescent currents and eliminat the necessity for external
biasing components in many
applications. The output voltage range also includes the
negative power supply voltage.
FEATURES
• Short circuited protected outputs
• True differential input stage
• Single supply operation:3.0V to 32V
• Low input bias currents:100nA Max
• Four amplifiers per package
• Internally compensated
• Common mode range extends to negative supply
• Industry standard pinouts
• ESD clamps on the inputs increase raggedness without
affecting device operation
CIRCUIT DESCRIPTION
The PJ324 series is made using four internally
compensated, two-stage operational amplifiers. The
first stage of each consists of differential input
devices Q20 and Q18 with input buffer transistors
Q21 and Q17 and the differential to single ended
converter Q3 and Q4 . The first stage performs not
only the first stage gain function but also performs
the level shifting and transconductance reduction
functions. By reducing the transconductance a smaller
compensation capacitor (only 5.0pF ) can be
employed , thus saving chip area. The
transconductance reduction is accomplished by
splitting the collectors of Q20 and Q18 . Another
feature of this input stage is that the input common
mode range can include the negative supply or ground,
in single supply operation without saturating either
the input devices or the differential to single-ended
converter . The second stage consists of a standed
current source load amplifier stage.
LARGE SIGNAL VOLTAGE FOLLOWER RESPONSE
Each amplifier is biased from an internal voltage
regulator which has a low temperature coefficient thus
giving each amplifier good temperature characteristics
as will as excellent power supply rejection.
