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PDF OPA301 Data sheet ( Hoja de datos )
| Número de pieza | OPA301 | |
| Descripción | Low-Noise / High-Speed / 16-Bit Accurate / CMOS OPERATIONAL AMPLIFIER | |
| Fabricantes | Burr-Brown | |
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OPA300
OPA301
SBOS271A − MAY 2003 − REVISED DECEMBER 2003
Low-Noise, High-Speed, 16-Bit Accurate, CMOS
OPERATIONAL AMPLIFIER
FEATURES
D High Bandwidth: 150MHz
D 16-Bit Settling in 150ns
D Low Noise: 3nV/√Hz
D Low Distortion: 0.003%
D Low Power: 9.5mA (typ) on 5.5V
D Shutdown to 5µA
D Unity Gain Stable
D Excellent Output Swing:
(V+) − 100mV to (V−) + 100mV
D Single Supply: +2.7V to +5.5V
D Tiny Packages: SO-8 and SOT23
APPLICATIONS
D 16-Bit ADC Input Drivers
D Low-Noise Preamplifiers
D IF/RF Amplifiers
D Active Filtering
DESCRIPTION
The OPA300 and OPA301 high-speed, voltage-feed-
back, CMOS operational amplifiers are designed for
16-bit resolution systems. The OPA300 and OPA301
are unity-gain stable and feature excellent settling and
harmonic distortion specifications. Low power applica-
tions benefit from low quiescent current. The OPA300
features digital shutdown (Enable) function to provide
additional power savings during idle periods. Optimized
for single-supply operation, the OPA300 and OPA301
offer superior output swing and excellent common-
mode range.
The OPA300 and OPA301 have 150MHz of unity-gain
bandwidth, low 3nV/√Hz voltage noise, and 0.1%
settling within 30ns. Single-supply operation from 2.7V
(±1.35V) to 5.5V (±2.75V) and an available shutdown
function that reduces supply current to 5µA are useful
for portable low-power applications. The OPA300 and
OPA301 are available in SO-8 and SOT-23 packages,
and are specified over the industrial temperature range
of −40°C to +125°C.
OPA300
OPA301
NC 1
−In 2
+In 3
V− 4
8 Enable
7 V+
6 VOUT
5 NC
NC 1
−In 2
+In 3
V− 4
8 NC
7 V+
6 VOUT
5 NC
Out 1
V− 2
+In 3
SO−8
NC = Not Connected
SO−8
NC = Not Connected
OPA300
6 V+
Out 1
5 Enable V− 2
4 −In
+In 3
SOT23−6
OPA301
5 V+
4 −In
SOT23−5
OPA300
VIN
16-Bit
ADC
Typical Application of the OPA300
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright 2003, Texas Instruments Incorporated
www.ti.com
1 page  
www.ti.com
OPA300
OPA301
SBOS271A − MAY 2003 − REVISED DECEMBER 2003
TYPICAL CHARACTERISTICS (continued)
All specifications at TA = 25°C, V+ = 5V, and RL = 150Ω connected to VS/2 unless otherwise noted.
HARMONIC DISTORTION vs OUTPUT VOLTAGE
−50
RL = 200Ω
f = 1MHz
−60 RF = 310Ω
G=2
THD
−70
2nd−Harmonic
−80
3rd−Harmonic
−90
−100
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
Output Voltage (VPP)
HARMONIC DISTORTION vs NONINVERTING GAIN
−50
VO = 2VPP
−60
RL = 200Ω
f = 1MHz
RF = 310Ω
−70
THD
2nd−Harmonic
−80
3rd−Harmonic
−90
−100
−110
1
Gain (V/V)
10
HARMONIC DISTORTION vs INVERTING GAIN
−50
VO = 2VPP
−60
RL = 200Ω
f = 1MHz
THD
RF = 310Ω
−70
2nd−Harmonic
3rd−Harmonic
−80
−90
−100
−110
1
Gain (V/V)
10
HARMONIC DISTORTION vs LOAD RESISTANCE
−60
−65
−70 THD
−75
2nd−Harmonic
VO = 2VPP
f = 1MHz
Gain = 2
RF = 310Ω
−80
−85
3rd−Harmonic
−90
−95
−100
100
Load Resistance (Ω)
1k
−50
−60
−70
−80
−90
−100
HARMONIC DISTORTION vs FREQUENCY
VO = 2VPP
RL = 200Ω
Gain = 2
RF = 310Ω
THD
2nd−Harmonic
3rd−Harmonic
−110
−120
100k
1M
Frequency (Hz)
10M
INPUT VOLTAGE AND CURRENT NOISE
SPECTRAL DENSITY vs FREQUENCY
10k
1k Current Noise
Voltage Noise
100
10
1
10
100
1k
10k 100k 1M
10M
Frequency (Hz)
5
5 Page 
www.ti.com
DRIVING CAPACITIVE LOADS
When using high−speed operational amplifiers, it is
extremely important to consider the effects of
capacitive loading on amplifier stability. Capacitive
loading will interact with the output impedance of the
operational amplifier, and depending on the capacitor
value, may significantly decrease the gain bandwidth,
as well as introduce peaking. To reduce the effects of
capacitive loading and allow for additional capacitive
load drive, place a series resistor between the output
and the load. This will reduce available bandwidth, but
permit stable operation with capacitive loading.
Figure 3 illustrates the recommended relationship
between the resistor and capacitor values.
100
75
50
OPA300
OPA301
SBOS271A − MAY 2003 − REVISED DECEMBER 2003
DRIVING A 16-BIT ADC
The OPA30x features excellent THD+noise, even at
frequencies greater than 1MHz, with a 16-bit settling
time of 150ns. Figure 4 shows a total single supply
solution for high-speed data acquisition. The OPA30x
directly drives the ADS8401, a 1.25 mega sample per
second (MSPS) 16-bit data converter. The OPA30x is
configured in an inverting gain of 1, with a 5V single
supply. Results of the OPA30x performance are
summarized in Table 1.
130pF
(mica)
1820Ω
1820Ω
5V
VIN
130pF
OPA30x
(mica)
fS = 1.25MSPS
f = 10kHz
10Ω
ADS8401
1.5nF
25
0
1 10 100
Capacitive Load (pF)
Figure 3. Recommended RS and CL Combinations
Amplifiers configured in unity gain are most susceptible
to stability issues. The typical characteristic, Frequency
Response vs Capacitive Load, describes the relation-
ship between capacitive load and stability for the
OPA30x. In unity gain, the OPA300 is capable of driving
a few picofarads of capacitive load without compromis-
ing stability. Board level parasitic capacitance can often
fall into the range of a picofarad or more, and should be
minimized through good circuit-board layout practices
to avoid compromising the stability of the OPA30x. For
more information on detecting parasitics during testing,
see the Application Note Measuring Board Parasitics in
High-Speed Analog Design (SBOA094), available at
the TI web site www.ti.com.
Figure 4. The OPA30x Drives the 16-Bit ADS8401
PARAMETER
RESULTS (f = 10kHz)
THD
−99.3dB
SFDR
101.2dB
THD+N
84.2dB
SNR
84.3dB
Table 1. OPA30x Performance Results Driving a
1.25MSPS ADS8401
11
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| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet OPA301.PDF ] | |
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