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PDF OPA2374 Data sheet ( Hoja de datos )
| Número de pieza | OPA2374 | |
| Descripción | 6.5MHz / 585UA / Rail-to-Rail I/O CMOS Operational Amplifier | |
| Fabricantes | Burr-Brown | |
| Logotipo |  |
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OPA373, OPA2373
OPA374
OPA2374, OPA4374
SBOS279D − SEPTEMBER 2003 − REVISED DECEMBER 2004
6.5MHz, 585µA, Rail-to-Rail I/O
CMOS Operational Amplifier
FEATURES
D LOW OFFSET: 5mV (max)
D LOW IB: 10pA (max)
D HIGH BANDWIDTH: 6.5MHz
D RAIL-TO-RAIL INPUT AND OUTPUT
D SINGLE SUPPLY: +2.3V to +5.5V
D SHUTDOWN: OPAx373
D SPECIFIED UP TO +125°C
D MicroSIZE PACKAGES: SOT23-5, SOT23-6,
and SOT23-8
APPLICATIONS
D PORTABLE EQUIPMENT
D BATTERY-POWERED DEVICES
D ACTIVE FILTERS
D DRIVING A/D CONVERTERS
OPA373
OPA374
DESCRIPTION
The OPA373 and OPA374 families of operational
amplifiers are low power and low cost with excellent
bandwidth (6.5MHz) and slew rate (5V/µs). The input
range extends 200mV beyond the rails and the output
range is within 25mV of the rails. Their speed/power ratio
and small size make them ideal for portable and
battery-powered applications.
The OPA373 family includes a shutdown mode. Under
logic control, the amplifiers can be switched from normal
operation to a standby current that is less than 1µA.
The OPA373 and OPA374 families of operational
amplifiers are specified for single or dual power supplies
of +2.7V to +5.5V, with operation from +2.3V to +5.5V. All
models are specified for −40°C to +125°C.
OPA2373
Out 1
V− 2
+IN 3
6 V+
5 Enable
4 −IN
Out 1
V− 2
+IN 3
SOT23−6(1)
OPA373
SOT23−5
NC(2) 1
−IN 2
+IN 3
V− 4
NC(2) 1
−IN 2
+IN 3
V− 4
8 Enable
7 V+
6 OUT
5 NC(2)
SO−8
OPA374
8 NC(2)
7 V+
6 OUT
5 NC(2)
OUT A 1
−IN A 2
+IN A 3
V+ 4
+IN B 5
−IN B 6
OUT B 7
5 V+
4 −IN
OUT A 1
−IN A 2
+IN A 3
V− 4
Enable A 5
A
10 V+
9 OUT B
8 −IN B
B
7 +IN B
6 Enable B
OPA4374
AD
BC
MSOP−10
OPA2374
OUT A 1
14 OUT D −IN A 2
13 −IN D +IN A 3
12 +IN D
V− 4
11 V−
10 +IN C
9 −IN C
8 OUT C
A
B
SO−8, SOT23−8
8 V+
7 OUT B
6 −IN B
5 +IN B
SO−14, TSSOP−14
SO−8
(1) Pin 1 of the SOT23-6 is determined by orienting the package marking as shown.
(2) NC indicates no internal connection.
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.
All trademarks are the property of their respective owners.
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 2003-2004, Texas Instruments Incorporated
www.ti.com
1 page  
www.ti.com
OPA373, OPA2373
OPA374
OPA2374, OPA4374
SBOS279D − SEPTEMBER 2003 − REVISED DECEMBER 2004
TYPICAL CHARACTERISTICS
At TA = +25°C, RL = 10kΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted.
OPEN−LOOP GAIN AND PHASE vs FREQUENCY
120 30
100
Gain
80
0
−30
60 −60
40
Phase
20
−90
−120
0 −150
−20 −180
10 100 1k 10k 100k 1M 10M
Frequency (Hz)
1000
INPUT VOLTAGE NOISE
SPECTRAL DENSITY vs FREQUENCY
100
120
100
80
60
40
20
0
100
POWER−SUPPLY AND COMMON−MODE
REJECTION RATIO vs FREQUENCY
CMRR
PSRR
1k 10k 100k 1M
Frequency (Hz)
0.100
TOTAL HARMONIC DISTORTION+NOISE
vs FREQUENCY
RL = 5kΩ
10M
0.010
G = 10V/V
10
10
130
120
100 1k 10k
Frequency (Hz)
100k
OPEN−LOOP GAIN AND POWER−SUPPLY
REJECTION RATIO vs TEMPERATURE
RL = 100kΩ
110
RL = 5kΩ
100
PSRR
90
80
−50 −25
0
25 50 75 100 125 150
Temperature (_ C)
0.001
10
G = 1V/V
100 1k 10k
Frequency (Hz)
100k
COMMON−MODE REJECTION RATIO vs TEMPERATURE
120
VS = 5.5V
110
VCM = −0.2V to 3.5V
100
90
80
VCM = −0.2V to 5.7V
70
60
50
40
−50 −25
0
25 50 75 100 125 150
Temperature (_C)
5
5 Page 
www.ti.com
DRIVING ADCs
The OPA373 and OPA374 series op amps are optimized
for driving medium-speed sampling ADCs. The OPA373
and OPA374 op amps buffer the ADC input capacitance
and resulting charge injection, while providing signal gain.
The OPA373 is shown driving the ADS7816 in a basic
noninverting configuration, as shown in Figure 7. The
ADS7816 is a 12-bit, MicroPower sampling converter in
the MSOP-8 package. When used with the low-power,
miniature packages of the OPA373, the combination is
ideal for space-limited, low-power applications. In this
configuration, an RC network at the ADC input can be used
to provide anti-aliasing filtering.
OPA373, OPA2373
OPA374
OPA2374, OPA4374
SBOS279D − SEPTEMBER 2003 − REVISED DECEMBER 2004
Figure 8 shows the OPA373 driving the ADS7816 in a
speech band-pass filtered data acquisition system. This
small, low-cost solution provides the necessary
amplification and signal conditioning to interface directly
with an electret microphone. This circuit will operate with
VS = 2.7V to 5V.
The OPA373 is shown in the inverting configuration
described in Figure 9. In this configuration, filtering may be
accomplished with the capacitor across the feedback
resistor.
ENABLE/SHUTDOWN
OPA373 and OPA374 series op amps typically require
585µA quiescent current. The enable/shutdown feature of
the OPA373 allows the op amp to be shut off in order to
reduce this current to less than 1µA.
+5V
0.1µF
0.1µF
VIN
VIN = 0V to 5V for
0V to 5V output.
OPA373
500Ω
3300pF
8 V+
1 VREF
7
DCLOCK
+In
2
−In
ADS7816
6
12−Bit ADC
DOUT
5
CS/SHDN
3 GND 4
Serial
Interface
fSAMPLE = 100kHz
RC network filters high frequency noise.
NOTE: ADC Input = 0 to VREF
Figure 7. The OPA373 in Noninverting Configuration Driving the ADS7816
R1
1.5kΩ
C1
1000pF
R2
1MΩ
Electret
Microphone(1)
R3
1MΩ
V+ = +2.7V to +5V
R4
20kΩ
1/2
OPA2373
R6
100kΩ
R7
51kΩ
R9
510kΩ
R8
150kΩ
C3
33pF
C2
1000pF
1/2
OPA2373
NOTE: (1) Electret microphone
powered by R1.
R5
20kΩ
G = 100
Passband 300Hz to 3kHz
VREF 1
8 V+
7
+IN ADS7816 6
2
−IN
12−Bit ADC 5
3
4 GND
DCLOCK
D OUT
CS/SHDN
Serial
Interface
Figure 8. The OPA2373 as a Speech Bypass Filtered Data Acquisition System
11
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet OPA2374.PDF ] | |
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