PA09A Cirrus Logic Inc, PA09A Datasheet - Page 5

• Manufacturer Part Number: PA09A
• Description: OP AMP VID 80V 5A TO-3-8 CE SG
• Manufacturer: Cirrus Logic Inc
• Series: Apex Precision Power™r

Specifications of PA09A

• Applications: General Purpose
• Number Of Circuits: 1
• Slew Rate: 220 V/µs
• Current - Supply: 70mA
• Current - Output / Channel: 4.5A
• Voltage - Supply, Single/dual (±): 24 V ~ 80 V, ±12 V ~ 40 V
• Mounting Type: Surface Mount
• Package / Case: TO-3-8
• Number Of Channels: 1
• Voltage Gain Db: 98 dB
• Common Mode Rejection Ratio (min): 104 dB
• Input Offset Voltage: 0.5 mV
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Maximum Dual Supply Voltage: +/- 40 V
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 598-1299

current. Output voltage is given as peak. Currents are aver-
age responding supply readings, but AC monitoring will reveal
current pulses corresponding to periods of high slew rate. For
example, driving ±30v outputs at 500KHz on ±40v supplies
produces a .8A pulse during negative slew and a 1.2A pulse
during positive slew. if the input signal is over driven by several
times the output swing capability, pulses up to 4A may be seen.
THERMAL SHUTDOWN PROTECTION
the substrate temperature exceeds approximately 150°C. This
allows heatsink selection to be based on normal operating
conditions while protecting the amplifier against excessive
junction temperature during temporary fault conditions.
PA09U
The thermal protection circuit shuts off the amplifier when
Thermal protection is a fairly slow-acting circuit and therefore
1.5
1.4
1.3
1.2
1.1
1.0
7.0
5.5
4.0
2.5
1.0
100
10K
QUIESCENT vs. SQUARE DRIVE
QUIESCENT vs. SINE DRIVE
P r o d u c t I n n o v a t i o n F r o m
FREQUENCY, F (KHz)
FREQUENCY, F (KHz)
15V
O
15V
/40V
300
100K
32V
O
/23V
S
O
/40V
S
S
1000
1M
does not protect the amplifier against transient SOA violations
(areas outside of the T
protect against short-term fault conditions that result in high
power dissipation within the amplifier, if the conditions that
cause thermal shutdown are not removed, the amplifier will
oscillate in and out of shutdown. This will result in high peak
power stresses, destroy signal integrity, and reduce the reli-
ability of the device.
STABILITY
than lower bandwidth Power Operational Amplifiers. To prevent
oscillations a reasonable phase margin must be maintained by:
1. Pay very careful attention to supply bypassing and circuit
2. Keeping the external sumpoint stray capacitance to ground
3. Connect the case to a local AC ground potential.
CURRENT LIMIT
current limit curve given under typical performance graphs is
based on junction temperature. if the amplifier is operated at
cold junction temperatures, current limit could be as high as 8
amps. This is above the maximum allowed current on the SOA
curve of 5 amps. Systems using this part must be designed to
keep the maximum output current to less than 5 amps under all
conditions. The internal current limit only provides this protec-
tion for junction temperatures of 80°C and above.
Due to its large bandwidth the PA09 is more likely to oscillate
internal current limiting is provided in the PA09. Note the
grounding. This is very important when step functions are
driven and the PA09 shares supplies with more active
devices.
at a minimum and the sumpoint load resistance (input and
feedback resistors in parallel) below 500Ω. larger sumpoint
load resistances can be used with increased phase com-
pensation and/or bypassing of the feedback resistor.
C
= 25°C boundary). it is designed to
PA09 • PA09A
5