|
|
PDF OPA631 Data sheet ( Hoja de datos )
| Número de pieza | OPA631 | |
| Descripción | Low Power / Single-Supply OPERATIONAL AMPLIFIERS TM | |
| Fabricantes | Burr-Brown | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de OPA631 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
|
No Preview Available !
® OPA631
OPA631
OPA632
For most current data sheet and other product
information, visit www.burr-brown.com
TM Low Power, Single-Supply
OPERATIONAL AMPLIFIERS
FEATURES
q HIGH BANDWIDTH: 75MHz (G = +2)
q LOW SUPPLY CURRENT: 6mA
q ZERO POWER DISABLE (OPA632)
q +3V AND +5V OPERATION
q INPUT RANGE INCLUDES GROUND
q 4.8V OUTPUT SWING ON +5V SUPPLY
q HIGH SLEW RATE: 100V/µs
q LOW INPUT VOLTAGE NOISE: 6nV/√HZ
q AVAILABLE IN SOT23 PACKAGE
APPLICATIONS
q SINGLE SUPPLY ADC INPUT BUFFER
q SINGLE SUPPLY VIDEO LINE DRIVER
q CCD IMAGING CHANNELS
q LOW POWER ULTRASOUND
q PLL INTEGRATORS
q PORTABLE CONSUMER ELECTRONICS
+3V
2.26kΩ
Disable
+3V
374Ω
VIN
562Ω
DIS
OPA632
Pwrdn
100Ω
750Ω
22pF
ADS901
10-Bit
20Msps
DESCRIPTION
The OPA631 and OPA632 are low power, high-speed,
voltage-feedback amplifiers designed to operate on a
single +3V or +5V supply. Operation on ±5V or +10V
supplies is also supported. The input range extends
below ground and to within 1V of the positive supply.
Using complementary common-emitter outputs pro-
vides an output swing to within 30mV of ground and
130mV of the positive supply. The high output drive
current and low differential gain and phase errors also
make them ideal for single-supply consumer video
products.
Low distortion operation is ensured by the high gain
bandwidth (68MHz) and slew rate (100V/µs), making
the OPA631 and OPA632 ideal input buffer stages to
3V and 5V CMOS converters. Unlike other low power,
single-supply amplifiers, distortion performance im-
proves as the signal swing is decreased. A low 6nV
input voltage noise supports wide dynamic range op-
eration. Channel multiplexing or system power reduc-
tion can be achieved using the high speed disable line.
Power dissipation can be reduced to zero by taking the
disable line High.
The OPA631 and OPA632 are available in an industry-
standard SO-8 package. The OPA631 is also available
in an ultra-small SOT23-5 package, while the OPA632
is available in the SOT23-6. Where higher full-power
bandwidth and lower distortion are required in a single-
supply operational amplifier, consider the OPA634
and OPA635.
RELATED PRODUCTS
Medium Speed, No Disable
With Disable
High Speed, No Disable
With Disable
SINGLES
OPA631
OPA632
OPA634
OPA635
DUALS
OPA2631
—
OPA2634
—
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
© 1999 Burr-Brown Corporation
PDS-1377A
Printed in U.S.A. June, 1999
1 page  
TYPICAL PERFORMANCE CURVES: VS = +5V
At TA = 25°C, G = +2, RF = 750Ω, and RL = 150Ω to VS/2, unless otherwise noted (see Figure 1).
SMALL-SIGNAL FREQUENCY RESPONSE
6
3 VO = 200mVp-p
G = +2
0
–3
–6
–9
G = +5
–12
–15
G = +10
–18
–21
–24
1
10 100 300
Frequency (MHz)
12
9
6
3
0
–3
–6
–9
–12
–15
–18
1
LARGE-SIGNAL FREQUENCY RESPONSE
VO = 0.2Vp-p
VO = 1Vp-p
VO = 2Vp-p
VO = 4Vp-p
10 100 300
Frequency (MHz)
SMALL-SIGNAL PULSE RESPONSE
VO = 200mVp-p
VO
VIN
LARGE-SIGNAL DISABLE/ENABLE RESPONSE
VO = 4Vp-p
VO
VIN
Time (10ns/div)
Time (10ns/div)
LARGE-SIGNAL DISABLE/ENABLE RESPONSE
VDIS
VIN = 0.5V
OPA632 Only
Time (50ns/div)
VO
DISABLE FEEDTHROUGH vs FREQUENCY
–35
OPA632 Only
–40 VDIS = +5V
–45
–50
–55
–60
–65
–70
–75
–80
–85
1
10 100
Frequency (MHz)
1000
®
5 OPA631, OPA632
5 Page 
APPLICATIONS INFORMATION
WIDEBAND VOLTAGE-FEEDBACK OPERATION
The OPA631 and OPA632 are unity-gain stable, very high-
speed, voltage-feedback op amps designed for single-supply
operation (+3V to +5V). The input stage supports input
voltages below ground, and within 1.0V of the positive
supply. The complementary common-emitter output stage
provides an output swing to within 30mV of ground and
130mV of the positive supply. They are compensated to
provide stable operation with a wide range of resistive loads.
The OPA632’s internal disable circuitry is intended to mini-
mize system power when disabled.
Figure 1 shows the AC-coupled, gain of +2 configuration
used for the +5V Specifications and Typical Performance
Curves. For test purposes, the input impedance is set to 50Ω
with a resistor to ground. Voltage swings reported in the
Specifications are taken directly at the input and output pins.
For the circuit of Figure 1, the total effective load on the
output at high frequencies is 150Ω || 1500Ω. The disable pin
(OPA635 only) needs to be driven by a low impedance
source, such as a CMOS inverter. The 1.50kΩ resistors at
the non-inverting input provide the common-mode bias
voltage. Their parallel combination equals the DC resistance
at the inverting input, minimizing the output DC offset.
+VS = 5V
6.8µF
+
1.50kΩ
0.1µF
+
0.1µF
VIN DIS (OPA632 only)
53.6Ω
1.50kΩ
OPA63x
VOUT
RL
150Ω
0.1µF 750Ω
750Ω
+VS
2
FIGURE 1. AC-Coupled Signal—Resistive Load to Supply
Midpoint.
Figure 2 shows the DC-coupled, gain of +2 configuration
used for the +3V Specifications and Typical Performance
Curves. For test purposes, the input impedance is set to 50Ω
with a resistor to ground. Though not strictly a “rail-to-rail”
design, these parts come very close, while maintaining
excellent performance. They will deliver ≈ 2.9Vp-p on a
single +3V supply with 61MHz bandwidth. The 374Ω and
2.26kΩ resistors at the input level-shift VIN so that VOUT is
within the allowed output voltage range when VIN = 0. See
the Typical Performance Curves for information on driving
capacitive loads.
+VS = 3V
6.8µF
+
2.26kΩ
0.1µF
+
374Ω
VIN
57.6Ω
OPA63x
DIS (OPA632 only)
VOUT
RL
150Ω
562Ω
750Ω
+VS
2
FIGURE 2. DC-Coupled Signal—Resistive Load to Supply
Midpoint.
SINGLE-SUPPLY ADC CONVERTER INTERFACE
The front page shows a DC-coupled, single-supply ADC
driver circuit. Many systems are now requiring +3V supply
capability of both the ADC and its driver. The OPA632
provides excellent performance in this demanding applica-
tion. Its large input and output voltage ranges, and low
distortion, support converters such as the ADS901 shown in
this figure. The input level-shifting circuitry was designed
so that VIN can be between 0V and 0.5V, while delivering an
output voltage of 1V to 2V for the ADS901. Both the
OPA632 and ADS901 have power reduction pins with the
same polarity for those systems that need to conserve power.
DC LEVEL SHIFTING
Figure 3 shows a DC-coupled non-inverting amplifier that
level-shifts the input up to accommodate the desired output
voltage range. Given the desired signal gain (G), and the
amount VOUT needs to be shifted up (∆VOUT) when VIN is at
the center of its range, the following equations give the
resistor values that produce the best DC offset.
where:
NG = G + ∆VOUT/VS
R1 = R4/G
R2 = R4/(NG – G)
R3 = R4/(NG –1)
NG = 1 + R4/R3 (Noise Gain)
VOUT = (G)VIN + (NG – G)VS
Make sure that VIN and VOUT stay within the specified input
and output voltage ranges.
®
11 OPA631, OPA632
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet OPA631.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| OPA631 | SpeedPlus Low-Power Single-Supply Operational Amplifiers (Rev. A) |  Texas Instruments |
| OPA631 | Low Power / Single-Supply OPERATIONAL AMPLIFIERS TM | Burr-Brown |
| OPA632 | SpeedPlus Low-Power Single-Supply Operational Amplifiers (Rev. A) | Texas Instruments |
| OPA632 | Low Power / Single-Supply OPERATIONAL AMPLIFIERS TM | Burr-Brown |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |