CIRRUS PA15FL

PA15FL
• PA15FLA
PA15FL
• PA15FLA
Product
IPnrno odvuac tt i Ionnn o v a t i o n F r o m
PA15FL,
PA15FLA
From
High Voltage Power Operational Amplifiers
FEATURES
• HIGH VOLTAGE — 450V (±225V)
• LOW COST
• LOW QUIESCENT CURRENT — 3.0mA Max
• HIGH OUTPUT CURRENT — 200mA
• PROGRAMMABLE CURRENT LIMIT
APPLICATIONS
10-pin SIP
PACKAGE STYLE fl
• PIEZOELECTRIC POSITIONING
• HIGH VOLTAGE INSTRUMENTATION
• ELECTROSTATIC TRANSDUCERS
• PROGRAMMABLE POWER SUPPLIES UP TO 440V
Formed leads available
See package style FU
TYPICAL APPLICATION
RF
DESCRIPTION
The PA15FL is a high voltage, low quiescent current MOSFET
operational amplifier designed as a low cost solution for driving
continuous output currents up to 200mA and pulse currents up
to 350mA into capacitive loads. The safe operating area (SOA)
has no second breakdown limitations and can be observed for
all type loads by choosing an appropriate current limiting resistor.
The MOSFET input stage has integrated static and differential
mode protection. The MOSFET output stage is biased AB for
linear operation. External compensation provides flexibility
in choosing bandwidth and slew rate for the application. The
10-pin power SIP package is electrically isolated.
EQUIVALENT SCHEMATIC
6
+VS
R1 R2
Q1
C1
Q3
Q6
9
CC1
Q5
R4
8
CC2
Q8
R7
Q4
ILIM
7
Q11
1
–IN
R8
R9
1
COMPUTER
FOCUS
COMMAND
VOLTAGE
–VS
5
R11
Q12
EXTERNAL CONNECTIONS
2
Q13
3
4
5
NC
NC
–VS
http://www.cirrus.com
6
7
+VS I LIM
8
9
C C2 C C1
RC
+IN
10
OUT
CC
Q14
RCL
Q16
PHASE COMPENSATION
R12
GAIN
≥1
≥ 10
CC
33pf
OPEN
RCL ≅
PA15FLU
RCL
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 PA15FL reduces the
costs of power supplies and cooling with its advantages of low
cost and low quiescent power consumption while increasing
circuit density with the SIP package.
1
R10
Q15
7
5
VOUT
-VS
–IN
2
+IN
2
PIEZO DRIVE
10
PA15FL
10
OUT
R6
R5
6
RIN
LOW POWER, PIEZOELECTRIC POSITIONING
R3
Q2
+VS
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
RC
1KΩ
OPEN
.6
ICL
MAY 20091
APEX − PA15FLUREVC
PA15FL • PA15FLA
P r o d u c t I n n o v a t i o nF r o m
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, +VS to –VS
OUTPUT CURRENT, source, sink
POWER DISSIPATION, continuous @ TC = 25°C
INPUT VOLTAGE, differential
INPUT VOLTAGE, common mode
TEMPERATURE, pin solder - 10s max
TEMPERATURE, junction2
TEMPERATURE RANGE, storage
OPERATING TEMPERATURE RANGE, case
SPECIFICATIONS
PARAMETER
TEST CONDITIONS 1
INPUT
OFFSET VOLTAGE, initial
OFFSET VOLTAGE, vs. temperature
OFFSET VOLTAGE, vs. supply
OFFSET VOLTAGE, vs. time
BIAS CURRENT, initial
BIAS CURRENT, vs. supply
OFFSET CURRENT, initial
INPUT IMPEDANCE, DC
INPUT CAPACITANCE
COMMON MODE VOLTAGE RANGE3
COMMON MODE REJECTION, DC
NOISE
VCM = ±90V
10KHz BW, RS = 1KΩ, CC = OPEN
GAIN
OPEN LOOP, @ 15Hz
GAIN BANDWIDTH PRODUCT at 1MHz
POWER BANDWIDTH
PHASE MARGIN
RL = 2KΩ, CC = OPEN
RL = 2KΩ, CC = OPEN
RL = 2KΩ, CC = OPEN
Full temperature range
OUTPUT
VOLTAGE SWING3
CURRENT, continuous
SLEW RATE, AV = 100
CAPACITIVE LOAD, AV = +1
SETTLING TIME to .1%
RESISTANCE, no load
POWER SUPPLY
VOLTAGE 5
CURRENT, quiescent,
THERMAL
RESISTANCE, AC, junction to case 4
RESISTANCE, DC, junction to case
RESISTANCE, junction to air
TEMPERATURE RANGE , Case
MIN
Full temperature range
IO = ±200mA
CC = OPEN
Full temperature range
CC = OPEN, 2V step
See note 5
Full temperature range, F > 60Hz
Full temperature range, F < 60Hz
Full temperature range
Meets full range specifications
±VS –15
80
94
PA15FL
PA15FLA
TYP
MAX
MIN TYP
MAX
2
15
10
75
200
4
50
1011
4
98
2
111
5.8
24
60
±VS–15 ±VS–10
±200
20
100
2
50
±50
–25
450V
See SOA
30W
±25V
±VS
260°C
150°C
–40 to +85°C
–25 to +85°C
±150
2.0
30
10
.5
3
50
5
20
50
*
*
*
2000
*
*
*
500
30
200
*
*
*
*
*
*
*
UNITS
mV
µV/°C
µV/V
µV/√kh
pA
pA/V
pA
Ω
pF
V
dB
µVrms
*
*
*
*
dB
MHz
kHz
°
*
*
*
20
30
*
*
*
V
mA
V/µs
pf
µs
Ω
±225
*
3.0
*
*
*
*
2.5
*
4.2
*
*
+85
*
*
V
mA
°C/W
°C/W
°C/W
°C
NOTES: * The specification of PA15FLA is identical to the specification for PA15FL in applicable column to the left.
1. Unless otherwise noted: TC = 25°C, compensation = CC = 33pF, RC = 1KΩ, RCL = 0. 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. +VS and –VS denote the positive and negative power supply rail respectively.
4. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz.
5. Derate max supply rating .625 V/°C below 25°C case. No derating needed above 25°C case.
CAUTION
The PA15FL is constructed from MOSFET transistors. ESD handling procedures must be observed.
The exposed substrate contains beryllia (BeO). Do not crush, machine, or subject to temperatures in excess of 850°C to
avoid generating toxic fumes.
2
PA15FLU
PA15FL • PA15FLA
QUIESCENT CURRENT, IQ (mA)
90
CC = 33pF
0
VOLTAGE DROP FROM SUPPLY, +VS – VO (V)
100
1K 10K .1M 1M
FREQUENCY, F (Hz)
85°C
8
125°C
6
–55°C
4
25°C
2
0
.3
.1
40
80
120
160
LOAD CURRENT, I (mA)
200
HARMONIC DISTORTION
RL = 1K
CC = Open
A = 30
5 watt
.01
.001
30
PA15FLU
50 mW
100
1K
10K 30K
FREQUENCY, F (Hz)
PHASE, Ф (°)
CC = 33pF
0
–10
100K
10M
SWING FROM +VS
10
10
1M
FREQUENCY, F (Hz)
16
12
125°C
8
100
–55°C
0
25°C
40
80
120
160
LOAD CURRENT, I (mA)
CC = Open
80
60
40
1K
10K
100
.1M
FREQUENCY, F (Hz)
1M
350
10M
CC = Open
300
250
200
150
100
50
0
10K
200
COMMON MODE REJECTION
20
10
1M
FREQUENCY, F (Hz)
OPEN LOOP OUTPUT IMPEDANCE
85°C
0
CC = Open
180
400
20
4
135
270
100K
10M
SWING FROM –VS
24
CC = 33pF
225
OUTPUT IMPEDANCE, R (Ω)
20
CC = Open
20
VOLTAGE DROP FROM SUPPLY, +VS – VO (V)
40
30
POWER SUPPLY REJECTION, PSR (dB)
OPEN LOOP GAIN, A (dB)
40
COMMON MODE REJECTION, CMR (dB)
OPEN LOOP GAIN, A (dB)
100
CC = Open
n
pe
45
60
100K 200K
10K
FREQUENCY, F (Hz)
PHASE RESPONSE
50
80
2K
SMALL SIGNAL RESPONSE
120
–20
10
DISTORTION, (%)
=O
SMALL SIGNAL RESPONSE
20
f
TC = -55°C
2.0
100
300
200
400 450
TOTAL SUPPLY VOLTAGE, VS (V)
25
50
75 100 125 150
CASE TEMPERATURE, TC (°C)
5p
2.2
100
=1
0
TC = 25°C
f
0
TC = 85°C
3p
8
2.4
=3
16
TC = 125°C
2.6
CC
24
500
CC
32
POWER RESPONSE
QUIESCENT CURRENT
2.8
OUTPUT VOLTAGE, VO (VP-P)
POWER DERATING
40
CC
OUTPUT STAGE
INTERNAL POWER DISSIPATION, P (W)
P r o d u c t I n n o v a t i o nF r o m
100K
1M
FREQUENCY, F (Hz)
3M
POWER SUPPLY REJECTION
120
100
80
60
40
20
0
1
10
100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
3
PA15FL • PA15FLA
P r o d u c t I n n o v a t i o nF r o m
GENERAL
POWER SUPPLY PROTECTION
Please read Application Note 1 "General Operating Considerations" which covers stability, supplies, heat sinking,
mounting, current limit, SOA interpretation, and specification
interpretation. Visit www.Cirrus.com for design tools that help
automate tasks such as calculations for stability, internal power
dissipation, current limit; heat sink selection; Apex Precision
Power’s complete Application Notes library; Technical Seminar
Workbook; and Evaluation Kits.
Unidirectional zener diode transient suppressors are recommended as protection on the supply pins. The zeners clamp
transients to voltages within the power supply rating and also
clamp power supply reversals to ground. Whether the zeners
are used or not, the system power supply should be evaluated
for transient performance including power-on overshoot and
power-off polarity reversals as well as line regulation.
Conditions which can cause open circuits or polarity reversals
on either power supply rail should be avoided or protected
against. Reversals or opens on the negative supply rail are
known to induce input stage failure. Unidirectional transzorbs
prevent this, and it is desirable that they be both electrically
and physically as close to the amplifier as possible.
CURRENT LIMIT
For proper operation, the current limit resistor (RCL) must be
connected as shown in the external connection diagram. The
minimum value is 2 ohm, however for optimum reliability the
resistor value should be set as high as possible. The value
is calculated as follows; with the maximum practical value of
150 ohms.
.6 RCL = ILIM
SAFE OPERATING AREA (SOA)
The MOSFET output stage of this power operational amplifier has two distinct limitations:
1. The current handling capability of the MOSFET geometry
and the wire bonds.
2. The junction temperature of the output MOSFETs.
SOA
STABILITY
The PA15FL has sufficient phase margin to be stable with
most capacitive loads at a gain of 10 or more, using the recommended phase compensation.
The PA15FL is externally compensated and performance can
be tailored to the application. Use the graphs of small signal
response and power response as a guide. The compensation
capacitor CC must be rated at 500V working voltage. An NPO
capacitor is recommended. The compensation network CCRC
must be mounted closely to the amplifier pins 8 and 9 to avoid
spurious oscillation.
FIGURE 2. OVERVOLTAGE PROTECTION
500
a.
OUTPUT CURRENT FROM +VS OR –VS, (mA)
Z1
0m
S
10
200
0m
S
DC
,T
C
DC
,T
100
C
,T
C
50
=
1
–IN
=
25
°C
+IN
85
D1
D2
D3
D4
2
°C
DC
=
12
6
PA15FL
5
Z2
5°
C
–VS
b.
30
+VS
Z1
20
10
25
PULSE CURVES @ 10% DUTY CYCLE MAX
50
75 100 125
250
SUPPLY TO OUTPUT DIFFERENTIAL, VS –VO (V)
1
–IN
Although the PA15FL can withstand differential input voltages
up to ±25V, additional external protection is recommended. In
most applications 1N4148 or 1N914 signal diodes are sufficient
(D1-D4 in Figure 2a). In more demanding applications where
low leakage or low capacitance are of concern 2N4416 or
2N5457-2N5459 JFETs connected as diodes will be required
(Q1-Q4 in Figure 2b). In either case the input differential voltage
will be clamped to ±1.4V. This is sufficient overdrive to produce
maximum power bandwidth.
Q2
Q1
500
INPUT PROTECTION
4
+VS
20
300
+IN
Q3
Q4
6
PA15FL
2
5
Z2
–VS
PA15FLU
P r o d u c t I n n o v a t i o nF r o m
PA15FL • PA15FLA
Contacting Cirrus Logic Support
For all Apex Precision Power product questions and inquiries, call toll free 800-546-2739 in North America.
For inquiries via email, please contact [email protected]
International customers can also request support by contacting their local Cirrus Logic Sales Representative.
To find the one nearest to you, go to www.cirrus.com
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PA15FLU
5