1
2
3
4
5
6
7
8
Offset Trim
V+
In
+In
V
Output
Offset Trim
NC
8-Pin DIP, SO-8
8
1
2
7
6
5
3
4
Offset
Trim
Offset
Trim
Output
V+
NC
In
+In
V
Case is connected to V
TO-99
High Voltage FET-Input
OPERATIONAL AMPLIFIER
OPA445
FEATURES
q
WIDE-POWER SUPPLY RANGE:
10V to
45V
q
HIGH SLEW RATE: 15V/
s
q
LOW INPUT BIAS CURRENT: 10pA
q
STANDARD-PINOUT TO-99, DIP, AND
SURFACE-MOUNT PACKAGES
DESCRIPTION
The OPA445 is a monolithic operational amplifier
capable of operation from power supplies up to
45V
and output currents of 15mA. It is useful in a wide
variety of applications requiring high output voltage
or large common-mode voltage swings.
The OPA445's high slew rate provides wide power-
bandwidth response, which is often required for high-
voltage applications. FET input circuitry allows the
use of high-impedance feedback networks, thus mini-
mizing their output loading effects. Laser trimming of
the input circuitry yields low input offset voltage and
drift.
The OPA445 is available in standard pin-out TO-99,
DIP-8, and SO-8 surface-mount packages. It is fully
specified from 25
C to +85
C and operates from
55
C to +125
C. A SPICE macromodel is available
for design analysis.
APPLICATIONS
q
TEST EQUIPMENT
q
HIGH-VOLTAGE REGULATORS
q
POWER AMPLIFIERS
q
DATA ACQUISITION
q
SIGNAL CONDITIONING
q
AUDIO
q
PIEZO DRIVERS
1987 Burr-Brown Corporation
PDS-754H
Printed in U.S.A. March, 2000
OPA445
OPA445
For most current data sheet and other product
information, visit www.burr-brown.com
International Airport Industrial Park Mailing Address: PO Box 11400, Tucson, AZ 85734 Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 Tel: (520) 746-1111
Twx: 910-952-1111 Internet: http://www.burr-brown.com/ Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132
2
OPA445
SPECIFICATIONS
At T
A
= +25
C, V
S
=
40V, and R
L
= 5k
, unless otherwise specified.
Boldface limits apply over the specified temperature range, T
A
= 25
C to +85
C. V
S
=
40V.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
OPA445BM
OPA445AP, AU
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
OFFSET VOLTAGE
Input Offset Voltage
V
OS
V
CM
= 0, I
O
= 0
1
3
1.5
5
mV
vs Temperature
V
OS
/dT
T
A
= 25
C to +85
C
10
T
V/
C
vs Power Supply
PSRR
V
S
=
10V to
45V
4
100
T
T
V/V
INPUT BIAS CURRENT
(1)
Input Bias Current
I
B
V
CM
= 0V
10
50
T
100
pA
Over Specified Temperature Range
10
20
nA
Input Offset Current
I
OS
V
CM
= 0V
4
20
T
40
pA
Over Specified Temperature Range
5
10
nA
NOISE
Input Voltage Noise Density, f = 1kHz
e
n
15
T
nV/
Hz
Current Noise Density, f = 1kHz
i
n
6
T
fA/
Hz
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
V
CM
V
S
=
40V
(V)+5
(V+)5
T
T
V
Common-Mode Rejection
CMRR
V
CM
= 35V to +35V
80
95
T
T
dB
Over Specified Temperature Range
80
T
dB
INPUT IMPEDANCE
Differential
10
13
|| 1
T
|| pF
Common-Mode
10
14
|| 3
T
|| pF
OPEN-LOOP GAIN, DC
Open-Loop Voltage Gain
A
OL
V
O
= 35V to +35V
100
110
T
T
dB
Over Specified Temperature Range
97
T
dB
FREQUENCY RESPONSE
Gain Bandwidth Product
GBW
2
T
MHz
Slew Rate
SR
V
O
= 70Vp-p
5
15
T
T
V/
s
Full Power Bandwidth
V
O
= 70Vp-p
23
70
T
T
kHz
Rise Time
V
O
=
200mV
100
T
ns
Overshoot
G = +1, Z
L
= 5k
|| 50pF
35
T
%
Total Harmonic Distortion + Noise
THD+N
f = 1kHz, V
O
= 3.5Vr ms, G = 1
0.0002
T
%
f = 1kHz, V
O
= 10Vr ms, G = 1
0.00008
T
%
OUTPUT
Voltage Output
V
O
(V)+5
(V+)5
T
T
V
Over Specified Temperature Range
(V)+5
(V+)5
T
T
V
Current Output
I
O
V
O
=
28V
15
T
mA
Output Resistance, Open Loop
R
O
dc
220
T
Short Circuit Current
I
SC
26
T
mA
Capacitive Load Drive
C
LOAD
See Typical Curve
(2)
T
POWER SUPPLY
Specified Operating Range
V
S
40
T
V
Operating Voltage Range
10
45
T
T
V
Quiescent Current
I
Q
I
O
= 0
4.2
4.7
T
T
mA
TEMPERATURE RANGE
Specification Range
25
+85
T
T
C
Operating Range
55
+125
T
T
C
Storage Range
65
+125
55
+125
C
Thermal Resistance
JA
TO-99
200
C/W
8-Pin DIP
100
C/W
SO-8 Surface-Mount
150
C/W
T
Specifications same as OPA445BM.
NOTE: (1) High-speed test at T
J
= +25
C. (2) See "Small-Signal Overshoot vs Load Capacitance" in the Typical Performance Curves section.
3
OPA445
ABSOLUTE MAXIMUM RATINGS
(1)
Power Supply .....................................................................................
50V
Differential Input Voltage ...................................................................
80V
Input Voltage Range ................................................................... |
V
S
| 3V
Storage Temperature Range: M ..................................... 65
C to +150
C
P, U ................................. 55
C to +125
C
Operating Temperature Range ....................................... 55
C to +125
C
Lead Temperature (soldering, 10s) ............................................... +300
C
Output Short-Circuit to Ground (T
J
< +125
C) ......................... Continuous
Junction Temperature: M ................................................................. 175
C
P,U .............................................................. 150
C
NOTE: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may degrade
device reliability.
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.
PACKAGE /ORDERING INFORMATION
PACKAGE
SPECIFIED
DRAWING
TEMPERATURE
PACKAGE
ORDERING
TRANSPORT
PRODUCT
PACKAGE
NUMBER
RANGE
MARKING
NUMBER
(1)
MEDIA
OPA445AP
8-Pin DIP
006
25
C to +85
C
OPA445AP
OPA445AP
Rails
OPA445AU
SO-8 Surface-Mount
182
25
C to +85
C
OPA445AU
OPA445AU
Rails
OPA445AU
"
"
"
"
OPA445AU/2K5
Tape and Reel
OPA445BM
8-Pin TO-99
001
25
C to +85
C
OPA445BM
OPA445BM
Rails
NOTE: (1) Products followed by a slash (/) are only available in Tape and Reel in the quantities indicated (e.g., /2K5 indicates 2500 devices per reel). Ordering 2500
pieces of "OPA445AU/2K5" will get a single 2500 piece Tape and Reel.
4
OPA445
TYPICAL PERFORMANCE CURVES
At T
A
= +25
C, V
S
=
40V, unless otherwise noted.
75
0
50
25
25
75
100
125
Temperature (C)
0.01pA
100nA
10nA
1nA
100pA
10pA
1pA
0.1pA
Input Bias Current
INPUT BIAS CURRENT
vs TEMPERATURE
50
10
1k
100
10k
1M
10M
Frequency (Hz)
0
140
120
100
80
60
40
20
Voltage Gain (dB)
OPEN-LOOP GAIN AND PHASE
vs FREQUENCY
100k
Gain
185
45
90
135
Phase (Degrees)
GBW
75
0
50
25
25
75
100
125
Ambient Temperature (C)
1.4
2.6
2.4
2.2
2.0
1.8
1.6
Gain Bandwidth (MHz)
GAIN BANDWIDTH AND SLEW RATE
vs TEMPERATURE
SR
10
16
15
14
13
12
11
50
Slew Rate (V/s)
GBW
10
20
30
40
50
Supply Voltage (V
S
)
1.6
2.2
2.0
1.8
Gain Bandwidth (MHz)
GAIN BANDWIDTH AND SLEW RATE
vs SUPPLY VOLTAGE
Slew Rate (V/s)
SR
13
19
17
15
10
20
30
40
50
Supply Voltage (V
S
)
125
120
115
110
105
100
95
Voltage Gain (dB)
OPEN-LOOP GAIN AND SUPPLY CURRENT
vs SUPPLY VOLTAGE
Supply Current (mA)
A
VOL
3.0
4.5
4.0
3.5
I
Q
50
40
30
20
10
I
B
+I
B
0
10
20
30
40
50
Common-Mode Voltage (V)
40
35
30
25
20
15
10
5
0
Bias Current (pA)
INPUT BIAS CURRENT
vs COMMON-MODE VOLTAGE
5
OPA445
TYPICAL PERFORMANCE CURVES
(Cont.)
At T
A
= +25
C, V
S
=
40V, unless otherwise noted.
10
100
1k
10k
1M
10M
100M
Frequency (Hz)
0
Power Supply Rejection (dB)
POWER SUPPLY REJECTION
vs FREQUENCY
100k
120
100
80
60
40
20
PSRR
+PSRR
75
0
50
25
25
75
100
125
Ambient Temperature (C)
90
120
110
100
Voltage Gain (dB)
OPEN-LOOP GAIN vs TEMPERATURE
50
10
100
1k
100k
Frequency (Hz)
1
100
10
Voltage Noise (nV/ Hz)
10k
INPUT VOLTAGE NOISE SPECTRAL DENSITY
10
100
1k
10k
1M
10M
Frequency (Hz)
Common-Mode Rejection (dB)
COMMON-MODE REJECTION
vs FREQUENCY
100k
100
90
80
70
60
50
40
75
0
50
25
25
75
100
125
Ambient Temperature (C)
130
120
110
100
90
80
70
PSRR, CMRR (dB)
POWER SUPPLY REJECTION AND
COMMON-MODE REJECTION vs TEMPERATURE
50
PSRR
CMRR
20
100
1k
20k
Frequency (Hz)
0.1
0.01
0.001
0.0001
0.00001
THD+Noise (%)
10k
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
V
O
= 3.5Vrms
V
O
= 10Vrms
V
O
= 3.5Vrms
V
O
= 10Vrms
G = 10
G = 1
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