OPA379
OPA2379
OPA4379
SBOS347C − NOVEMBER 2005 − REVISED AUGUST 2006
1.8V, 2.9 A, 90kHz, Rail-to-Rail I/O
OPERATIONAL AMPLIFIERS
FEATURES
DLOW NOISE: 2.8 VPP
DmicroPower: 5.5 A (max)
DLOW OFFSET VOLTAGE: 1.5mV (max)
DDC PRECISION:
−CMRR: 100dB
−PSRR: 2 V/V
−A OL: 120dB
DWIDE SUPPLY VOLTAGE RANGE: 1.8V to 5.5V
DmicroSize PACKAGES
APPLICATIONS
DBATTERY-POWERED INSTRUMENTS
DPORTABLE DEVICES
DMEDICAL INSTRUMENTS
DESCRIPTION
The OPA379 family of micropower, low-voltage operational amplifiers is designed for battery-powered applications. These amplifiers operate on a supply voltage as low as 1.8V. High-performance, single-supply operation with rail-to-rail capability makes the OPA379 family useful for a wide range of applications.
In addition to microSize packages, the OPA379 family of op amps features impressive bandwidth (90kHz), low bias current (25pA), and low noise (80nV/√Hz) relative to the very low quiescent current (5.5 A max).
The OPA379 (single) is available in SC70-5, SOT23-5, and SO-8 packages. The OPA2379 (dual) comes in SOT23-8 and SO-8 packages. The OPA4379 (quad) is offered in a TSSOP-14 package. All versions are specified from −40 °C to +125°C.
OPAx379 RELATED PRODUCTS
D HANDHELD TEST EQUIPMENT |
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FEATURES |
PRODUCT |
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1 A, 70kHz, 2mV VOS, 1.8V to 5.5V Supply |
OPAx349 |
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1 A, 5.5kHz, 390 V VOS, 2.5V to 16V Supply |
TLV240x |
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1 A, 5.5kHz, 0.6mV VOS, 2.5V to 12V Supply |
TLV224x |
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7 A, 160kHz, 0.5mV VOS, 2.7V to 16V Supply |
TLV27Lx |
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7 A, 160kHz, 0.5mV VOS, 2.7V to 16V Supply |
TLV238x |
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20 A, 350kHz, 2mV VOS, 2.3V to 5.5V Supply |
OPAx347 |
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20 A, 500kHz, 550 V VOS, 1.8V to 3.6V Supply |
TLV276x |
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VCC |
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45 A, 1MHz, 1mV VOS, 2.1V to 5.5V Supply |
OPAx348 |
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1/2 |
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C2 |
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OPA2379 |
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C |
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C1 |
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RF |
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REF |
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VCC |
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W |
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R |
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B |
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RL |
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R1 |
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1/2 |
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VOUT |
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OPA2379 |
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R1
OPA2379 in Portable Gas Meter Application
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 |
Copyright 2005−2006, T exas Instruments Incorporated |
conform to specifications per the terms of Texas Instruments standard warranty. |
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Production processing does not necessarily include testing of all parameters. |
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www.ti.com
OPA379
OPA2379
OPA4379 |
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www.ti.com |
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SBOS347C − NOVEMBER 2005 − REVISED AUGUST 2006 |
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ABSOLUTE MAXIMUM RATINGS(1) |
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This integrated circuit can be damaged by ESD. Texas |
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Instruments recommends that all integrated circuits be |
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Supply Voltage . . . . . . |
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. . . . +7V |
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handled with appropriate precautions. Failure to observe |
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Signal Input Terminals, |
Voltage(2) |
−0.5V to (V+) + 0.5V |
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proper handling and installation procedures can cause damage. |
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. . . . . . . . .Current(2) |
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. ±10mA |
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ESD damage can range from subtle performance degradation to |
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Output Short-Circuit(3) . |
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Continuous |
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complete device failure. Precision integrated circuits may be more |
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Operating Temperature |
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−40 °C to +125°C |
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susceptible to damage because very small parametric changes could |
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cause the device not to meet its published specifications. |
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Storage Temperature |
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−65 °C to +150°C |
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Junction Temperature . . |
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. +150°C |
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ORDERING INFORMATION(1) |
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ESD Rating |
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Human Body Model |
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2000V |
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PACKAGE |
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PACKAGE |
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PRODUCT |
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PACKAGE-LEAD |
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DESIGNATOR |
MARKING |
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Charged Device Model |
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1000V |
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. . . . . . . . . . . . |
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OPA379 |
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SC70−5 |
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DCK |
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AYR |
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(1) Stresses above these ratings may cause permanent damage. |
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OPA379 |
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SOT23−5 |
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DBV |
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AYQ |
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Exposure to absolute maximum conditions for extended periods |
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OPA379 |
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SO−8 |
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D |
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OPA379A |
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may degrade device reliability. These are stress ratings only, and |
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functional operation of the device at these or any other conditions |
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OPA2379(2) |
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SOT23−8 |
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DCN |
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B61 |
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beyond those specified is not supported. |
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OPA2379 |
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SO−8 |
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D |
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OPA2379A |
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(2) Input terminals are diode-clamped to the power-supply rails. |
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OPA4379 |
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TSSOP−14 |
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PW |
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OPA4379A |
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Input signals that can swing more than 0.5V beyond the supply |
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(1) For the most current package and ordering information, see the |
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rails should be current-limited to 10mA or less. |
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Package Option Addendum at the end of this document, or see |
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(3) Short-circuit to ground, one amplifier per package. |
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the TI web site at www.ti.com. |
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(2) Available Q4, 2006. |
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PIN CONFIGURATIONS |
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OPA379 |
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OPA379 |
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OPA379 |
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V+ |
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+IN |
1 |
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5 |
OUT |
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1 |
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5 |
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V+ |
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NC(1) |
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1 |
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8 |
NC(1) |
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V− |
2 |
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V− |
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2 |
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− IN |
2 |
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7 |
V+ |
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−IN |
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OUT |
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3 |
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4 |
+IN |
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3 |
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4 |
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− IN |
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+IN |
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3 |
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6 |
OUT |
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V− |
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NC(1) |
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SC70−5 |
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4 |
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5 |
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SOT23−5 |
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SO−8 |
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OPA2379 |
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OUT A |
1 |
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8 |
V+ |
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− IN |
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2 |
B61 |
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OUT B |
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−IN B |
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+IN |
3 |
6 |
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V− |
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4 |
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5 |
+IN B |
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SOT23−8 (2)(3) |
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NOTES:
(1) NC denotes no internal connection.
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OPA2379 |
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OUT A |
OUT A |
1 |
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8 |
V+ |
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−IN A |
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− IN A |
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2 |
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7 |
OUT B |
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−IN B |
+IN A |
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+IN A |
3 |
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6 |
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V− |
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V+ |
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4 |
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5 |
+IN B |
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+IN B |
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SO−8 |
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− IN B |
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OUT B |
(2)Pin 1 of the SOT23−8 package is determined by orienting the package marking as shown.
(3)Available Q4, 2006.
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OPA4379 |
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1 |
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14 |
OUT D |
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− IN D |
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2 |
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13 |
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3 |
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12 |
+IN D |
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V− |
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4 |
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11 |
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5 |
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10 |
+IN C |
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− IN C |
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6 |
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9 |
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7 |
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OUT C |
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TSSOP−14 |
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2
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OPA379 |
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OPA2379 |
www.ti.com |
OPA4379 |
SBOS347C − NOVEMBER 2005 − REVISED AUGUST 2006
ELECTRICAL CHARACTERISTICS: VS = +1.8V TO +5.5V
Boldface limits apply over the specified temperature range indicated.
At TA = +25°C, RL = 25kΩ connected to VS/2, and VCM < (V+) − 1V, unless otherwise noted.
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OPA379, OPA2379, OPA4379 |
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PARAMETER |
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CONDITIONS |
MIN |
TYP |
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MAX |
UNIT |
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OFFSET VOLTAGE |
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Initial Offset Voltage |
VOS |
VS = 5V |
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0.4 |
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1.5 |
mV |
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Over −40 °C to +125°C |
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2 |
mV |
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Drift, −40 °C to +85°C |
dVOS/dT |
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1.5 |
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µV/°C |
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−40 °C to +125°C |
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2.7 |
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µV/°C |
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vs Power Supply |
PSRR |
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2 |
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10 |
µV/V |
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Over −40 °C to +125°C |
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20 |
µV/V |
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INPUT VOLTAGE RANGE |
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Common-Mode Voltage Range |
VCM |
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(V−) − 0.1 to (V+) + 0.1 |
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V |
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Common-Mode Rejection Ratio(1) |
CMRR |
(V−) < V CM < (V+) − 1V |
90 |
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dB |
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100 |
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Over −40 °C to +85°C |
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(V−) < V CM < (V+) − 1V |
80 |
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dB |
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Over −40 °C to +125°C |
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(V−) < V CM < (V+) − 1V |
62 |
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dB |
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INPUT BIAS CURRENT |
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Input Bias Current |
IB |
VS = 5V, VCM < = VS/2 |
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±5 |
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±50 |
pA |
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Input Offset Current |
IOS |
VS = 5V |
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±5 |
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±50 |
pA |
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INPUT IMPEDANCE |
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1013 || 3 |
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Differential |
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Ω || pF |
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Common-Mode |
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1013 || 6 |
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Ω || pF |
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NOISE |
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Input Voltage Noise, f = 0.1Hz to 10Hz |
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2.8 |
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µVPP |
||
Input Voltage Noise Density, f = 1kHz |
en |
|
|
80 |
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|
nV/√Hz |
||
Input Current Noise Density, f = 1kHz |
in |
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1 |
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fA/√ |
Hz |
|
OPEN-LOOP GAIN |
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Open-Loop Voltage Gain |
AOL |
VS = 5V, RL = 25kΩ, 100mV < VO < (V+) − 100mV |
100 |
120 |
|
|
dB |
||
Over −40 °C to +125°C |
|
VS = 5V, RL = 25kΩ, 100mV < VO < (V+) − 100mV |
80 |
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dB |
||
|
|
VS = 5V, RL = 5kΩ, 500mV < VO < (V+) − 500mV |
100 |
120 |
|
|
dB |
||
Over −40 °C to +125°C |
|
VS = 5V, RL = 5kΩ, 500mV < VO < (V+) − 500mV |
80 |
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dB |
||
OUTPUT |
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Voltage Output Swing from Rail |
|
RL = 25kΩ |
|
5 |
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10 |
mV |
||
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|||||||
Over −40 °C to +125°C |
|
RL = 25kΩ |
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15 |
mV |
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RL = 5kΩ |
|
25 |
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50 |
mV |
||
Over −40 °C to +125°C |
|
RL = 5kΩ |
|
±5 |
|
75 |
mV |
||
Short-Circuit Current |
ISC |
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|
mA |
|||
Capacitive Load Drive |
CLOAD |
|
See Typical Characteristics Curve |
Ω |
|||||
Closed-Loop Output Impedance |
ROUT |
G = 1, f = 1kHz, IO = 0 |
|
10 |
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|||
Open-Loop Output Impedance |
RO |
f = 100kHz, IO = 0 |
|
28 |
|
|
kΩ |
||
FREQUENCY RESPONSE |
|
CLOAD = 30pF |
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Gain Bandwidth Product |
GBW |
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|
90 |
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|
kHz |
||
Slew Rate |
SR |
G = +1 |
|
0.03 |
|
|
V/µs |
||
Overload Recovery Time |
|
VIN S GAIN > VS |
|
25 |
|
|
µs |
||
Turn-On Time |
tON |
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|
1 |
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|
ms |
||
POWER SUPPLY |
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Specified/Operating Voltage Range |
VS |
|
1.8 |
|
|
5.5 |
V |
||
Quiescent Current per Amplifier |
IQ |
VS = 5.5V, IO = 0 |
|
2.9 |
|
5.5 |
µA |
||
Over −40 °C to +125°C |
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10 |
µA |
||
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TEMPERATURE |
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Specified/Operating Range |
|
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−40 |
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+125 |
°C |
||
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||||||
Storage Range |
|
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−65 |
|
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+150 |
°C |
||
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||||||
Thermal Resistance |
qJA |
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°C/W |
||
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|||||
SC70−5 |
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250 |
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SOT23−5 |
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200 |
|
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°C/W |
||
|
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|||||
SOT23−8, TSSOP−14, SO−8 |
|
|
|
150 |
|
|
°C/W |
||
|
|
|
|
|
|
|
|
|
|
(1) See Typical Characteristic, Common-Mode Rejection Ratio vs Frequency.
3
OPA379
OPA2379
OPA4379 |
www.ti.com |
SBOS347C − NOVEMBER 2005 − REVISED AUGUST 2006 |
|
TYPICAL CHARACTERISTICS
At TA = +25°C, VS = 5V, RL = 25kΩ connected to VS/2, unless otherwise noted.
Gain (dB)
|
COMMON−MODE AND |
OPEN−LOOP GAIN AND PHASE |
POWER SUPPLY REJECTION RATIO |
vs FREQUENCY |
vs FREQUENCY |
120 |
|
|
|
|
|
0 |
|
|
120 |
|
|
|
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|
100 |
|
|
|
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|
− 30 |
|
(dB) |
100 |
|
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− 60 |
|
80 |
|
|
−PSRR |
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|||
80 |
|
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|
(Phase) |
PSRRandCMRR |
|
|
CMRR |
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||
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+PSRR |
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|
60 |
|
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− 90 |
|
|
60 |
|
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|
40 |
|
|
|
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− 120 |
|
|
40 |
|
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20 |
|
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− 150 |
|
|
20 |
|
|
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0 |
|
|
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|
|
− 180 |
|
|
0 |
|
|
|
|
|
|
0.1 |
1 |
10 |
100 |
1k |
10k |
100k |
|
|
0.1 |
1 |
10 |
100 |
1k |
10k |
100k |
|
|
|
Frequency (Hz) |
|
|
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|
|
Frequency (Hz) |
|
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|
|
PP
Output Voltage (V )
MAXIMUM OUTPUT VOLTAGE vs FREQUENCY
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
1k |
10k |
100k |
Frequency (Hz)
Quiescent Current ( A)
QUIESCENT CURRENT vs SUPPLY VOLTAGE
3.5
3.0
2.5
2.0
1.5
1.5 |
2.0 |
2.5 |
3.0 |
3.5 |
4.0 |
4.5 |
5.0 |
5.5 |
Supply Voltage (V)
|
|
|
|
|
OUTPUT VOLTAGE |
|
|
|
|
|||
|
|
|
|
vs OUTPUT CURRENT |
|
|
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|
||||
|
2.5 |
|
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|
2.0 |
|
|
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|
|
1.5 |
VS = ±2.5V |
|
|
|
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|
|
|
(mA) |
|
|
1.0 |
|
|
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|||
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|||
OUT |
|
|
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|
|
Current |
|
0.5 |
|
|
|
|
|
|
|
|
|
|
||
(V) |
|
+125_C |
|
|
+85_C |
|
+25_C |
|
− 40_C |
|
||
0 |
|
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||||||
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||||||
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|
Short−Circuit |
|
V |
− 1.5 |
|
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− 0.5 |
|
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− 1.0 |
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− 2.0 |
|
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− 2.5 |
|
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|
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
|
|
|
|
|
|
|
IOUT (mA) |
|
|
|
|
|
|
SHORT−CIRCUIT CURRENT vs SUPPLY VOLTAGE
25
+ISC
20
−ISC
15
10
5
1.5 |
2.0 |
2.5 |
3.0 |
3.5 |
4.0 |
4.5 |
5.0 |
5.5 |
Supply Voltage (V)
4
|
OPA379 |
|
OPA2379 |
www.ti.com |
OPA4379 |
SBOS347C − NOVEMBER 2005 − REVISED AUGUST 2006
TYPICAL CHARACTERISTICS (continued)
At TA = +25°C, VS = 5V, RL = 25kΩ connected to VS/2, unless otherwise noted.
OFFSET VOLTAGE vs COMMON−MODE VOLTAGE vs TEMPERATURE
15000
12500 |
Unit 1 |
CMRR Specified Range
|
10000 |
|
|
|
|
|
|
|
(µV) |
7500 |
|
|
|
|
|
|
|
5000 |
|
|
|
|
|
|
|
|
Voltage |
2500 |
|
|
|
|
|
|
|
0 |
|
|
|
|
|
|
|
|
− 2500 |
|
|
|
|
|
|
|
|
Offset |
|
|
|
|
|
|
|
|
− 5000 |
|
|
|
|
|
|
|
|
− 7500 |
|
|
|
|
|
|
|
|
|
|
− 40_C |
|
|
|
|
|
|
|
−10000 |
|
|
|
|
|
|
|
|
|
+85_C |
|
|
|
|
|
|
|
−12500 |
|
|
|
|
Unit 2 |
|
|
|
|
+125_C |
|
|
|
|
||
|
−15000 |
|
|
|
|
|
|
|
|
−0.1 |
0 |
1 |
2 |
3 |
4 |
5 |
5.1 |
|
|
|
|
|
|
|
||
|
|
|
Common−Mode Voltage (V) |
|
|
|
||
|
|
|
OFFSET VOLTAGE DRIFT DISTRIBUTION |
|
||||
|
|
|
|
(− 40_C to +85_C) |
|
|
|
|
|
Population |
|
|
|
|
|
|
|
|
|
≤1 |
≤2 |
≤ 3 |
≤4 |
≤ 5 |
> 5 |
|
|
|
|
Offset Voltage Drift (µV/_C) |
|
|
OFFSET VOLTAGE
PRODUCTION DISTRIBUTION
Population |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
−1500 |
−1350 |
−1200 |
−1050 |
−900 |
−750 |
−600 |
−450 −300 −150 0 150 300 450 |
600 |
750 |
900 |
1050 |
1200 |
1350 |
1500 |
|
|
|
|
|
|
|
Offset Voltage (µV) |
|
|
|
|
|
|
|
OFFSET VOLTAGE DRIFT DISTRIBUTION
|
|
(−40_C to +125_C) |
|
|
|
Population |
|
|
|
|
|
≤1 |
≤ 2 |
≤3 |
≤4 |
≤ 5 |
> 5 |
Offset Voltage Drift (µV/_C)
I (µA) Q
QUIESCENT CURRENT |
QUIESCENT CURRENT |
vs TEMPERATURE |
PRODUCTION DISTRIBUTION |
5.0
4.5 |
|
|
|
|
|
|
|
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|
|
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|
4.0 |
|
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|
|
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|
|
|
|
|
|
|
|
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|
|
|
|
|
|
3.5 |
|
|
|
|
|
|
|
Population |
|
|
|
|
|
|
|
|
|
|
|
|
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|
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|
|
|
3.0 |
|
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|
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||
|
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||
2.5 |
|
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2.0 |
|
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|
1.5 |
|
|
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|
1.0 |
|
|
|
|
|
|
|
1.00 |
1.20 |
1.40 |
1.60 |
1.80 |
2.00 |
2.20 |
2.40 |
2.60 |
2.80 |
3.00 |
3.20 |
3.40 |
3.60 |
3.80 |
4.00 |
4.20 |
4.40 |
4.60 |
4.80 |
5.00 |
|
−50 |
− 25 |
0 |
25 |
50 |
75 |
100 |
125 |
||||||||||||||||||||||
|
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|
|||||||||
|
|
|
Temperature (_C) |
|
|
|
|
|
|
|
|
|
Quiescent Current (µA) |
|
|
|
|
|
|
||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
5
OPA379
OPA2379
OPA4379 |
www.ti.com |
SBOS347C − NOVEMBER 2005 − REVISED AUGUST 2006 |
|
TYPICAL CHARACTERISTICS (continued)
At TA = +25°C, VS = 5V, RL = 25kΩ connected to VS/2, unless otherwise noted.
INPUT BIAS CURRENT |
|
vs TEMPERATURE |
0.1Hz TO 10Hz NOISE |
|
10000 |
|
|
|
|
|
|
|
|
1000 |
|
|
|
|
|
|
|
(pA) |
100 |
|
|
|
|
|
|
|
Current |
|
|
|
|
|
|
|
|
10 |
|
|
|
|
|
|
|
|
Bias |
1 |
|
|
|
|
|
|
|
Input |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.1 |
|
|
|
|
|
|
|
|
0.01 |
|
|
|
|
|
|
|
|
− 50 |
−25 |
0 |
25 |
50 |
75 |
100 |
125 |
|
|
|
|
Temperature (_C) |
|
|
|
1 V/div
2.5s/div
NOISE vs FREQUENCY
|
|
|
1000 |
|
|
(nV/√Hz) |
100 |
|
|||
|
|||
|
|
Noise |
|
|
|
|
10 |
1 |
10 |
100 |
1k |
10k |
Frequency (Hz)
SMALL−SIGNAL STEP RESPONSE
Overshoot (%)
SMALL−SIGNAL OVERSHOOT vs CAPACITIVE LOAD
60
50
40
30
G = +1
20
10
G = −1
0
10 |
100 |
1000 |
Capacitive Load (pF)
LARGE−SIGNAL STEP RESPONSE
20mV/div |
500mV/div |
25µs/div |
50µs/div |
6