PA85 Cirrus Logic Inc, PA85 Datasheet

IC PWR AMP 450V 200MA 8PIN TO3

PA85

Manufacturer Part Number
PA85
Description
IC PWR AMP 450V 200MA 8PIN TO3
Manufacturer
Cirrus Logic Inc
Series
Apex Precision Power™r
Datasheets

Specifications of PA85

Amplifier Type
Power
Number Of Circuits
1
Slew Rate
1000 V/µs
Gain Bandwidth Product
100MHz
Current - Input Bias
5pA
Voltage - Input Offset
500µV
Current - Supply
21mA
Current - Output / Channel
200mA
Voltage - Supply, Single/dual (±)
30 V ~ 450 V, ±15 V ~ 225 V
Operating Temperature
-25°C ~ 85°C
Mounting Type
Through Hole
Package / Case
TO-3-8
Number Of Channels
1
Voltage Gain Db
111 dB
Common Mode Rejection Ratio (min)
90 dB
Input Offset Voltage
2 mV
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
Maximum Dual Supply Voltage
+/- 225 V
Minimum Operating Temperature
- 25 C
Lead Free Status / RoHS Status
Lead free by exemption / RoHS compliant by exemption
Output Type
-
-3db Bandwidth
-
Lead Free Status / Rohs Status
 Details
Other names
598-1326

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PA85
Manufacturer:
APEX
Quantity:
32
Part Number:
PA85
Manufacturer:
APEX
Quantity:
20 000
Part Number:
PA85
0
Part Number:
PA85A
Manufacturer:
APEX
Quantity:
20 000
Part Number:
PA85M
Manufacturer:
APEX
Quantity:
20 000
–IN
5
FEATURES
• HIGH VOLTAGE — 450V (±225V)
• HIGH SLEW RATE — 1000V/μS
• HIGH OUTPUT CURRENT — 200mA
APPLICATIONS
• HIGH VOLTAGE INSTRUMENTATION
• PIEZO TRANSDUCER EXCITATION
• PROGRAMMABLE POWER SUPPLIES UP TO 430V
• ELECTROSTATIC TRANSDUCERS & DEFLECTION
DESCRIPTION
operational amplifier designed for output currents up to 200mA.
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 cur-
rent 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
PA85 features an unprecedented supply range and excellent
supply rejection. The MOSFET output stage is biased on for
linear operation. External compensation provides user flexibility.
capacitors and silicon semiconductor chips to maximize reli-
ability, minimize size and give top performance. Ultrasonically
bonded aluminum wires provide reliable interconnections at all
operating temperatures. The 8-pin TO-3 package is hermeti-
cally sealed and electrically isolated. The use of compressible
isolation washers voids the warranty.
EQUIVALENT SCHEMATIC
PA85U
The PA85 is a high voltage, high power bandwidth MOSFET
This hybrid circuit utilizes thick film (cermet) resistors, ceramic
Q10A
http://www.cirrus.com
Q6
Q1
Q13
High Voltage Power Operational Amplifiers
Q2
Q7
Q10B
PA85, PA85A
P r o d u c t I n n o v a t i o n F r o m
P r o d u c t I n n o v a t i o n F r o m
Q4
+IN
4
D2
D1
D23
COMP
7
Q11
8
Q16
Q8
Copyright © Cirrus Logic, Inc. 2009
Q17
Q12
Q9
(All Rights Reserved)
Q18
OUT
C
+V
–V
3
2
1
6
L
S
S
TYPICAL APPLICATION
as a beam traverses the face of a CRT. This is necessary in
high resolution flat face monitors since the distance between
cathode and screen varies as the beam moves from the center
of the screen to the edges. PA85 lends itself well to this function
since it can be connected as a summing amplifier with inputs
from the nominal focus potential and the dynamic correction.
The nominal might be derived from a potentiometer, or per-
haps automatic focusing circuitry might be used to generate
this potential. The dynamic correction is generated from the
sweep voltages by calculating the distance of the beam from
the center of the display.
EXTERNAL CONNECTIONS
Dynamic focusing is the active correction of focusing voltage
X SWEEP
Y SWEEP
SAMPLE
SAMPLE
z =
FOCUS
DC
x
+IN
–IN
2
+ y
4
5
2
Gain
PHASE COMPENSATION
+Vs
100
–Vs
20
1
C
C
PATENTED
SUPPLY VOLTAGE
3
6
R
R
TOP VIEW
RATED FOR FULL
IN1
IN2
COMP
PA85 • PA85A
CL
3.3pF
68pF
10pF
C
2
C
7
+225V
R
-225V
PA85
CL
R
APEX − PA85UREVO
1
8
F
R
PA85 • PA85A
100Ω
330Ω
C
OUT
COMP
PACKAGE STYLE CE
R
R
C
CL
C
C
8-PIN TO-3
MAY 2009
TO
FOCUS
GRID
1

Related parts for PA85

PA85 Summary of contents

Page 1

... PA85 lends itself well to this function since it can be connected as a summing amplifier with inputs from the nominal focus potential and the dynamic correction. ...

Page 2

... RESISTANCE, DC, junction to case RESISTANCE, junction to air TEMPERATURE RANGE, case NOTES: * The specification of PA85A is identical to the specification for PA85 in applicable column to the left. 1. Unless otherwise noted 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. Ratings apply only to output transistors. An additional 10W may be dissipated due to quiescent power. 3. Doubles for every 10° ...

Page 3

... FREQUENCY, F (Hz) POWER SUPPLY REJECTION 140 120 100 100 1K 10K FREQUENCY, F (Hz) PA85 • PA85A QUIESCENT CURRENT 1.20 1.15 1.10 1.05 1.00 .95 .90 40M 0 100 200 TOTAL SUPPLY VOLTAGE, V POWER RESPONSE 500 250 125 100 2KΩ ...

Page 4

... INPUT PROTECTION Although the PA85 can withstand differential voltages up to ±25V, additional external protection is recommended. Since the PA85 is a high speed amplifier, low leakage, low capaci- tance JFETs connected as diodes are recommended (e.g. 2N4416, Q1-Q4 in Figure 2). The differential input voltage will be clamped to ±1.4V. This is sufficient overdrive to produce maximum power bandwidth ...

Page 5

... Cirrus Logic, Cirrus, and the Cirrus Logic logo designs, Apex Precision Power, Apex and the Apex Precision Power logo designs are trademarks of Cirrus Logic, Inc. All other brand and product names in this document may be trademarks or service marks of their respective owners. PA85U PA85 • PA85A 5 ...

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