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PDF OPA445 Data sheet ( Hoja de datos )
| Número de pieza | OPA445 | |
| Descripción | High Voltage FET-Input OPERATIONAL AMPLIFIER | |
| Fabricantes | Burr-Brown | |
| Logotipo |  |
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OPA445
OPA445
OPA445
High Voltage FET-Input
OPERATIONAL AMPLIFIER
FEATURES
q WIDE-POWER SUPPLY RANGE:
±10V to ±45V
q HIGH SLEW RATE: 15V/µs
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-
APPLICATIONS
q TEST EQUIPMENT
q HIGH-VOLTAGE REGULATORS
q POWER AMPLIFIERS
q DATA ACQUISITION
q SIGNAL CONDITIONING
q AUDIO
q PIEZO DRIVERS
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.
NC
Offset
Trim 1
8
7 V+
–In 2
6 Output
+In 3
5 Offset
4 Trim
V–
Case is connected to V–
TO-99
Offset Trim 1
–In 2
+In 3
V– 4
8 NC
7 V+
6 Output
5 Offset Trim
8-Pin DIP, SO-8
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
©1987 Burr-Brown Corporation
PDS-754H
Printed in U.S.A. March, 2000
1 page  
TYPICAL PERFORMANCE CURVES (Cont.)
At TA = +25°C, VS = ±40V, unless otherwise noted.
POWER SUPPLY REJECTION
vs FREQUENCY
120
100
+PSRR
80
60
–PSRR
40
20
0
10 100 1k 10k 100k 1M 10M 100M
Frequency (Hz)
100
90
80
70
60
50
40
10
COMMON-MODE REJECTION
vs FREQUENCY
100 1k 10k 100k 1M 10M
Frequency (Hz)
OPEN-LOOP GAIN vs TEMPERATURE
120
110
100
90
–75 –50 –25 0 25 50 75
Ambient Temperature (°C)
100 125
POWER SUPPLY REJECTION AND
COMMON-MODE REJECTION vs TEMPERATURE
130
120
110 PSRR
100
CMRR
90
80
70
–75 –50 –25 0 25 50 75
Ambient Temperature (°C)
100 125
INPUT VOLTAGE NOISE SPECTRAL DENSITY
100
10
1
10 100 1k 10k 100k
Frequency (Hz)
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
0.1
0.01
0.001
0.0001
VO = 3.5Vrms
G = 10
VO = 3.5Vrms VO = 10Vrms
G=1
VO = 10Vrms
0.00001
20
100 1k
Frequency (Hz)
10k 20k
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5 OPA445
5 Page 
TYPICAL APPLICATIONS
R1
100kΩ
V1
R2
10kΩ
+40V
OPA445
–40V
V2
R3
100kΩ
R4
9.9kΩ
IL = [(V2 – V1)/R5] (R2/R1)
= (V2 – V1)/1kΩ
IL
Compliance Voltage Range = ±35V
NOTE: R1 = R3 and R2 = R4 + R5
R5
100Ω
Load
FIGURE 9. Voltage-to-Current Converter.
DAC80-CBI-I
0-2mA
Protects DAC
During Slewing
+60V
25kΩ
0.1µF
OPA445
0.1µF
VO = 0 to +50V
at 10mA
–12V
FIGURE 10. Programmable Voltage Source.
R1 R2
1kΩ 9kΩ
+45V
OPA445
VIN
±4V “MASTER”
–45V
160V
Piezo(1)
Crystal
R3
10kΩ
R4
10kΩ
+45V
OPA445
“SLAVE”
–45V
NOTE: (1) For transducers with large capacitance the stabilization
technique described in Figure 6 may be necessary. Be certain that the
“Master” amplifier is stable before stabilizing the “Slave” amplifier.
FIGURE 11. Bridge Circuit Doubles Voltage for Piezo Crystals.
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11 OPA445
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet OPA445.PDF ] | |
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