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PDF OPA603 Data sheet ( Hoja de datos )
| Número de pieza | OPA603 | |
| Descripción | High Speed / Current-Feedback / High Voltage OPERATIONAL AMPLIFIER | |
| Fabricantes | Burr-Brown | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de OPA603 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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®
OPA603
OPA603
OPA603
High Speed, Current-Feedback, High Voltage
OPERATIONAL AMPLIFIER
FEATURES
q WIDE SUPPLY RANGE: ±4.5 to ±18V
q BANDWIDTH: 100MHz, G = 1 to 10
q SLEW RATE: 1000V/µs
q FAST SETTLING TIME: 50ns to 0.1%
q HIGH OUTPUT CURRENT: ±150mA peak
q HIGH OUTPUT VOLTAGE: ±12V
APPLICATIONS
q VIDEO AMPLIFIER
q PULSE AMPLIFIER
q SONAR, ULTRASOUND BUFFERS
q ATE PIN DRIVERS
q xDSL LINE DRIVER
q FAST DATA ACQUISTION
q WAVEFORM GENERATORS
DESCRIPTION
The OPA603 is a high-speed current-feedback op amp
with guaranteed specifications at both ±5V and ±15V
power supplies. It can deliver full ±10V signals into
150Ω loads with up to 1000V/µs slew rate. This
allows it to drive terminated 75Ω cables. With 150mA
peak output current capability it is suitable for driving
load capacitance or long lines at high speed.
In contrast with conventional op amps, the current-
feedback approach provides nearly constant band-
width and settling time over a wide range of closed-
loop voltage gains.
The OPA603 is available in a plastic 8-pin DIP and
SO-16 surface-mount packages, specified over the
industrial temperature range.
+VS
7
+In
3
–VS
4
–In
2
VO
6
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/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1989 Burr-Brown Corporation
PDS-1026E
Printed in U.S.A. February, 1995
1 page  
TYPICAL PERFORMANCE CURVES
At TA = +25°C, unless otherwise noted.
OUTPUT SWING vs TEMPERATURE
14
RL = ∞
13
VS = ±15V
Positive Swing
12 RL = 150Ω
11
Negative Swing
10
–25
0 +25 +50 +75 +100
Temperature (°C)
OUTPUT SWING vs TEMPERATURE
3.1
RL = ∞
2.9
RL = 75Ω
Positive Swing
2.7
2.5 VS = ±5V
2.3
Negative Swing
2.1
–25
0 +25 +50 +75 +100
Temperature (°C)
+5
+4
+3
+2
+1
0
–1
–2
–3
–4
–5
–25
NONINVERTING INPUT BIAS CURRENT
vs TEMPERATURE
VS = ±15V
VS = ±5V
0 +25 +50 +75 +100
Temperature (°C)
+30
+20
+10
0
–10
–20
–30
–25
INVERTING INPUT BIAS CURRENT
vs TEMPERATURE
VS = ±15V
VS = ±5V
0 +25 +50 +75 +100
Temperature (°C)
COMMON-MODE REJECTION vs FREQUENCY
65
VS = ±15V
VS = ±5V
55
45
35
10 100 1k 10k 100k 1M 10M
Frequency (Hz)
–8 IB – COMMON-MODE REJECTION RATIO
10
–7
10
–6
10
VS = ±15V
VS = ±5V
–5
10
–4
10
10 100 1k 10k 100k 1M 10M
Frequency (Hz)
®
5 OPA603
5 Page 
RF (Ω) = 30 • (30 – G) for VS = ±15V
For example, for a gain of 10, use RF = 600Ω. Optimum
values differ slightly for ±5V operation:
R
F
(Ω)
=
30
•
(23
–
G)
for
V
S
=
±5V
CF will range from 1pF to 10pF depending on the selected
gain, load, and circuit layout. Adjust CF to optimize band-
width and minimize peaking. Figure 5 shows bandwidth
which can be acheived using this technique.
Typical values for this capacitor range from 1pF to 10pF
depending on closed-loop gain and load characteristics. Too
large a value of CF can cause instability.
BANDWIDTH AND FEEDBACK RESISTOR
vs INVERTING GAIN
60 3k
VOLTAGE GAIN vs FREQUENCY
30 G = 20, RF = 220Ω, CF ≈ 8pF
20 G = 10, RF = 560Ω, CF ≈ 3pF
10 G = 2, RF = 820Ω, CF ≈ 3pF
CF
0
–10
–20
1M
RF
RI
G = 1 + RF
RI
10M 100M
Frequency (Hz)
1G
FIGURE 5. Bandwidth Results with Added Capacitor CF.
52.5 2.25k
45
37.5
RI
30
–1
RF
–
+
G = –RF
RI
–10
Voltage Gain (V/V)
(4a)
1.5k
750
0
–100
BANDWIDTH AND FEEDBACK RESISTOR
vs NONINVERTING GAIN
60 4k
52.5 3k
45
37.5
30
1
RF
–
+
RI
G = 1 + RF
RI
10
Voltage Gain (V/V)
(4b)
2k
1k
0
100
FIGURE 4. Feedback Resistor Selection Curves.
UNITY-GAIN OPERATION
As Figure 4b indicates, the OPA603 can be operated in unity
gain. A feedback resistor (approximately 2.8kΩ) sets the
appropriate open-loop characteristics and resistor RI is omit-
ted. Just as with gains greater than one, the value of the
feedback resistor (and capacitor if used) can be optimized
for the desired dynamic response and load characteristics.
Care should be exercised not to exceed the maximum differ-
ential input voltage rating of ±6V. Large input voltage steps
which exceed the device’s slew rate of 1000V/µs can apply
excessive differential input voltage.
CIRCUIT LAYOUT
With any high-speed, wide-bandwidth circuitry, careful cir-
cuit layout will ensure best performance. Make short, direct
circuit interconnections and avoid stray wiring capacitance—
especially at the inverting input pin. A component-side
ground plane will help ensure low ground impedance. Do
not place the ground plane under or near the inputs and
feedback network.
Power supplies should be bypassed with good high-fre-
quency capacitors positioned close to the op amp pins. In
most cases, a 0.01µF ceramic capacitor in parallel with a
2.2µF solid tantalum capacitor at each power supply pin is
adequate. The OPA603 can deliver high load current—up to
150mA peak. Applications with low impedance or capaci-
tive loads demand large current transients from the power
supplies. It is the power supply bypass capacitors which
must supply these current transients. Larger bypass capaci-
tors such as 10µF solid tantalum capacitors may improve
performance in these applications.
POWER DISSIPATION
High output current causes increased internal power dissipa-
tion in the OPA603. Copper leadframe construction maxi-
mizes heat dissipation compared to conventional plastic
packages. To achieve best heat dissipation, solder the device
directly to the circuit board and use wide circuit board
traces. Solder the unused pins, (1, 5 and 8) to a top-side
ground plane for improved power dissipation. Limit the load
and signal conditions depending on maximum ambient tem-
perature to assure operation within the power derating curve.
The OPA603 may be operated at reduced power supply
voltage to minimize power dissipation. Detailed specifica-
tions are provided for both ±15V and ±5V operation.
®
11 OPA603
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet OPA603.PDF ] | |
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