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OPERATIONAL AMPLIFIERS. PA26 Datasheet |
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MICROTECHNOLOGY
POWER DUAL OPERATIONAL AMPLIFIERS
PA21/25/26 • PA21A/25A
HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739
FEATURES
• LOW COST
• WIDE COMMON MODE RANGE —
Includes negative supply
• WIDE SUPPLY VOLTAGE RANGE
Single supply: 5V to 40V
Split supplies: ±2.5V to ±20V
• HIGH EFFICIENCY — |Vs–2.2V| at 2.5A typ
• HIGH OUTPUT CURRENT — 3A min (PA21A)
• INTERNAL CURRENT LIMIT
• LOW DISTORTION
APPLICATIONS
• HALF & FULL BRIDGE MOTOR DRIVERS
• AUDIO POWER AMPLIFIER
STEREO — 18W RMS per channel
BRIDGE — 36W RMS per package
• IDEAL FOR SINGLE SUPPLY SYSTEMS
5V — Peripherals
12V — Automotive
28V — Avionic
DESCRIPTION
The amplifiers consist of a monolithic dual power op amp
in a 8-pin hermetic TO-3 package (PA21 and PA25) and a 12-
pin SIP package (PA26). Putting two power op amps in one
package and on one die results in an extremely cost effective
solution for applications requiring multiple amplifiers per
board or bridge mode configurations.
The wide common mode input range includes the negative
rail, facilitating single supply applications. It is possible to
have a “ground based” input driving a single supply amplifier
with ground acting as the “second” or “bottom” supply of the
amplifier.
The output stages are also well protected. They possess
internal current limit circuits. While the device is well pro-
tected, the Safe Operating Area (SOA) curve must be ob-
served. Proper heatsinking is required for maximum reliabil-
ity.
This hybrid integrated circuit utilizes thick film (cermet)
resistors, ceramic capacitors and semiconductor chips to
maximize reliability, minimize size and give top performance.
Ultrasonically bonded aluminum wires provide reliable inter-
connections at all operating temperatures. The 8-pin TO-3
package is hermetically sealed and electrically isolated. The
use of compressible isolation washers voids the warranty.
The tab of the SIP12 plastic package is tied to –VS.
R2 R3
9K
+28V
10K
R4
R1
–
10K
–
5K A M B
++
1/2 PA21
1/2 PA21
COMMAND
INPUT
0/10V
+28V
R5
10K
R6
10K
FIGURE 1: BIDIRECTIONAL SPEED CONTROL FROM
A SINGLE SUPPLY
The amplifiers are especially well-suited for this application.
The extended common mode range allows command inputs
as low as 0V. Its superior output swing abilities let it drive within
2V of supply at an output current of 2A. This means that a
command input that ranges from 0V to 10V will drive a 24V
motor from full scale CCW to full scale CW at up to ±2A. A
single power op amp with an output swing capability of Vs –6
would require ±30V supplies and would be required to swing
48V p-p at twice the speed to deliver an equivalent drive.
EXTERNAL CONNECTIONS
PA26
Connect pins
3 and 10 to pin 7
and connect pins
4 and 9 to pin 6
unless special
functions are re-
quired.
++
A
–
SUB B –
1 2 3 4 5 6 7 8 9 10 11 12
TYPICAL APPLICATION
R1 and R2 set up amplifier A in a non-inverting gain of 2.8.
Amp B is set up as a unity gain inverter driven from the output
of amp A. Note that amp B inverts signals about the reference
node, which is set at mid-supply (14V) by R5 and R6. When the
command input is 5V, the output of amp A is 14V. Since this is
equal to the reference node voltage, the output of amp B is also
14V, resulting in 0V across the motor. Inputs more positive
than 5V result in motor current flow from left to right (see Figure
1). Inputs less positive than 5V drive the motor in the opposite
direction.
+IN, A
3
–IN, A
+VS
2 OUT, B
1
4
–+
AB
+–
5
OUT, A TOP VIEW
8
–VS 6
PA25
7
+IN, B
–IN, B
–IN, A 3
4
+IN, A
5
+IN, B
6
–IN, B
PA21
+VS
2
A
B
7
–VS
OUT, A
1
8
OUT, B
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
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PA21/25/26 • PA21A/25A
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, total
OUTPUT CURRENT
POWER DISSIPATION, internal (per amplifier)
POWER DISSIPATION, internal (both amplifiers)
INPUT VOLTAGE, differential
INPUT VOLTAGE, common mode
JUNCTION TEMPERATURE, max1
TEMPERATURE, pin solder—10 sec max
TEMPERATURE RANGE, storage
OPERATING TEMPERATURE RANGE, case
5V to 40V
SOA
25W
36W
±VS
+VS, -VS–.5V
150°C
300°C
–65°C to 150°C
–55°C to 125°C
SPECIFICATIONS
PARAMETER
TEST CONDITIONS 2
INPUT
OFFSET VOLTAGE, initial
OFFSET VOLTAGE, vs. temperature
BIAS CURRENT, initial
COMMON MODE RANGE
COMMON MODE REJECTION, DC
POWER SUPPLY REJECTION
CHANNEL SEPARATION
GAIN
OPEN LOOP GAIN
GAIN BANDWIDTH PRODUCT
PHASE MARGIN
POWER BANDWIDTH
OUTPUT
CURRENT, peak
CURRENT, limit
SLEW RATE
CAPACITIVE LOAD DRIVE
VOLTAGE SWING
VOLTAGE SWING
VOLTAGE SWING
VOLTAGE SWING
Full temperature range
Full temperature range
Full temperature range
Full temperature range
IOUT = 1A, F = 1kHz
Full temperature range
AV = 40dB
Full temperature range
VO(P-P) = 28V
AV = 1
Full temp. range, IO = 100mA
Full temp. range, IO = 1A
IO = 2.5A (PA21, 25)
IO = 3.0A (PA21A, PA25A)
PA21/25/26
MIN TYP MAX
PA21A/PA25A
MIN TYP MAX UNITS
–VS–.3
60
60
50
1.5
15
35
85
80
68
10
1000
+VS–2
*
*
*
*
.5 4 mV
10 µV/°C
* 250 nA
*V
* dB
* dB
* dB
80 100
600
65
13.6
**
*
*
*
dB
kHz
°
kHz
2.5
3.0
.5 1.2
.22
|VS| –1.0 |VS| –0.8
|VS| –1.8 |VS| –1.4
|VS| –3.0 |VS| –2.8
3
4.0
**
*
**
**
|VS| –4.0 |VS| –3.5
A
A
V/µs
µF
V
V
V
V
POWER SUPPLY
VOLTAGE, VSS3
CURRENT, quiescent, total
54 30 40 * * * V
45 90
* * mA
THERMAL
RESISTANCE, junction to case
DC, single amplifier
DC, both amplifiers5
AC, single amplifier
AC, both amplifiers5
RESISTANCE, junction to air
TEMPERATURE RANGE, case
Meets full range specifications
5.0
3.4
3.7
2.4
30
–25
85 –25
*
*
*
°C/W
°C/W
°C/W
°C/W
°C/W
85 °C
NOTES: *
1.
2.
3.
4.
5.
The specification of PA21A/PA25A is identical to the specification for PA21/PA25 in applicable column to the left.
Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation
to achieve high MTTF.
Unless otherwise noted, the following conditions apply: ±VS = ±15V, TC = 25°C.
+VS and –VS denote the positive and negative supply rail respectively. VSS denotes the total rail-to-rail supply voltage.
Current limit may not function properly below VSS = 6V, however SOA violations are unlikely in this area.
Rating applies when power dissipation is equal in the two amplifiers.
CAUTION
The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or
subject to temperatures in excess of 850°C to avoid generating toxic fumes. (PA21 and PA25 only. PA26 does not contain
BeO).
APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
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