Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Op-amp Multi-purpose HTSSOP 20

FEATURES

D 1.2A OUTPUT CURRENT

D 12V

OUTPUT VOLTAGE

D WIDE POWER RANGE:

− Single Supply: +7V to +15V

− Dual Supply: ±3.5V to ±7.5V

D FULLY PROTECTED:

− Thermal Shutdown

− Adjustable Current Limit

D OUTPUT DISABLE CONTROL

D 17MHz GAIN-BANDWIDTH PRODUCT

D 50V/µs SLEW RATE

D 1MHz FULL-POWER BANDWIDTH

D THERMALLY ENHANCED HTSSOP-20

PowerPAD PACKAGE

APPLICATIONS

D POWER-LINE COMMUNICATIONS

D VALVE-ACTUATOR DRIVERS

D POWER SUPPLIES

D TEST EQUIPMENT

D TEC DRIVERS

D LASER DIODE DRIVERS

NOTE: Pins 1, 10, and 11−20 are not connected.

Flag must be connected to V

−

HTSSOP−20

+In

12345678910

20 19 18 17 16 15 14 13 12 11

V+ OUT E/S CLSI

LIM

−

In V

−

OPA561

DESCRIPTION

The OPA561 is a low-cost, high-current operational

amplifier capable of driving up to 1.2A pulses into reactive

loads. This monolithic integrated circuit provides high

reliability in demanding line-carrier communications, laser

diode drivers, and motor control applications. The high

slew rate provides 1MHz full-power bandwidth and

excellent linearity.

The OPA561 operates from either a single supply in the

range of 7V to 15V or dual power supplies of ±3.5V to

±7.5V for design flexibility. In single-supply operation, the

input common-mode range extends below ground. At

maximum output current, a wide output swing provides a

12Vp-p capability with a nominal 15V supply.

The OPA561 is internally protected against over-

temperature conditions and current overloads. In addition,

the OPA561 is designed to provide an accurate, user-

selected, current limit. The current limit can be adjusted

from 0.2A to 1.2A with a low-power resistor/potentiometer

or DAC (Digital-to-Analog Converter). The high-speed

characteristics of the current control loop provide accuracy

even under pulsed load conditions.

The Enable/Status (E/S) pin performs two functions: it can

be monitored to determine if the device is in thermal

shutdown (active LOW), and it can also be forced LOW to

disable the output, disconnecting the load.

The OPA561 is available in the miniature, HTSSOP-20

PowerPAD power package. This surface-mount package

is thermally enhanced and has a very low thermal

resistance. Operation is specified over the extended

industrial temperature range, −40_C to +125_C.

OPA561

SBOS206E − DECEMBER 2001 − REVISED FEBRUARY 2007

High-Current, High-Speed

OPERATIONAL AMPLIFIER

         

          

 !     !   

www.ti.com

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.

PowerPAD is a trademark of Texas instruments Incorporated. All other trademarks are the property of their respective owners.

Summary of content (19 pages)

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OPA561 SBOS206E − DECEMBER 2001 − REVISED FEBRUARY 2007 High-Current, High-Speed OPERATIONAL AMPLIFIER FEATURES DESCRIPTION D 1.2A OUTPUT CURRENT D 12VPP OUTPUT VOLTAGE D WIDE POWER RANGE: D D D D D D The OPA561 is a low-cost, high-current operational amplifier capable of driving up to 1.2A pulses into reactive loads. This monolithic integrated circuit provides high reliability in demanding line-carrier communications, laser diode drivers, and motor control applications.
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"#$ www.ti.com SBOS206E − DECEMBER 2001 − REVISED FEBRUARY 2007 ABSOLUTE MAXIMUM RATINGS(1) Supply Voltage, V− to V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V Input Voltage Range . . . . . . . . . . . . . . . (V−) −0.4V to (V+) + 0.5V Input Shutdown Voltage . . . . . . . . . . . . (V−) −0.4V to (V−) + 0.5V Operating Temperature . . . . . . . . . . . . . . . . . . . . . −40°C to +125°C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . .
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"#$ www.ti.com SBOS206E − DECEMBER 2001 − REVISED FEBRUARY 2007 ELECTRICAL CHARACTERISTICS (continued) BOLDFACE limits apply over the specified temperature range, TA = −40°C to +125°C. At TCASE = +25°C, VS = 15V, load connected to VS/2, and E/S enabled, unless otherwise noted.
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"#$ www.ti.com SBOS206E − DECEMBER 2001 − REVISED FEBRUARY 2007 TYPICAL CHARACTERISTICS At TCASE = +25°C, VS = 15V, and E/S enabled, unless otherwise noted.
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"#$ www.ti.com SBOS206E − DECEMBER 2001 − REVISED FEBRUARY 2007 TYPICAL CHARACTERISTICS (continued) At TCASE = +25°C, VS = 15V, and E/S enabled, unless otherwise noted.
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"#$ www.ti.com SBOS206E − DECEMBER 2001 − REVISED FEBRUARY 2007 TYPICAL CHARACTERISTICS (continued) At TCASE = +25°C, VS = 15V, and enabled, unless otherwise noted. SMALL−SIGNAL STEP RESPONSE LARGE−SIGNAL STEP RESPONSE Gain = −1, RLOAD = 5.0, CLOAD = 0 2V/div 10mV/div Gain = +1, RLOAD = 5.0, CLOAD = 0 200ns/div 200ns/div SHUTDOWN RESPONSE RL = 5Ω ENABLE RESPONSE RL = 5Ω VOUT 0V 0V −2V −2V 1V/div 1V/div (V−) + 2V (V−) + 2V VOUT E/S E/S (V−) + 0.
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"#$ www.ti.com SBOS206E − DECEMBER 2001 − REVISED FEBRUARY 2007 APPLICATIONS INFORMATION Figure 1 shows the OPA561 connected as a basic noninverting amplifier. However, the OPA561 can be used in virtually any op amp configuration. Power-supply terminals should be bypassed with low series impedance capacitors. The technique of using a ceramic and tantalum type in parallel is recommended. Power-supply wiring should have low series impedance.
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"#$ www.ti.com SBOS206E − DECEMBER 2001 − REVISED FEBRUARY 2007 ENABLE/STATUS (E/S) PIN The Enable/Status Pin provides two unique functions: 1) output disable by forcing the pin LOW and 2) thermal shutdown indication by monitoring the voltage level at the pin. One or both of these functions can be utilized on the same device. For normal operation (output enabled), the E/S pin must be pulled HIGH (at least 2V above V−).
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"#$ www.ti.com SBOS206E − DECEMBER 2001 − REVISED FEBRUARY 2007 OUTPUT PROTECTION Reactive and EMF-generation loads can return load current to the amplifier, causing the output voltage to exceed the power-supply voltage. This damaging condition can be avoided with clamp diodes from the output terminal to the power supplies, as shown in Figure 4. Schottky rectifier diodes with a 3A or greater continuous rating are recommended. +V 47µF maximum expected ambient condition of your application.
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"#$ www.ti.com SBOS206E − DECEMBER 2001 − REVISED FEBRUARY 2007 Soldering the PowerPAD to the PCB is always recommended, even with applications that have low power dissipation. It provides the necessary connection between the leadframe die and the PCB. The PowerPAD must be connected to the most negative supply of the device. THERMAL RESISTANCE vs CIRCUIT BOARD COPPER AREA Thermal Resistance, θ JA (_ C/W) 45 40 PowerPAD Assembly Process 35 1.
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"#$ www.ti.com SBOS206E − DECEMBER 2001 − REVISED FEBRUARY 2007 6. The top-side solder mask should leave exposed the terminals of the package and the thermal pad area. The thermal pad area should leave the 13 mil holes exposed. The larger 25 mil holes outside the thermal pad area should be covered with solder mask. 7. Apply solder paste to the exposed thermal pad area and all of the package terminals. 8.
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"#$ www.ti.com SBOS206E − DECEMBER 2001 − REVISED FEBRUARY 2007 APPLICATIONS CIRCUITS The high output current and low supply of the OPA561 makes it a good candidate for driving laser diodes and thermo electric coolers. Figure 9 shows the OPA561 configured as a laser diode driver. R1 3.3V RF +15V 3 MSP 430 R2 1kΩ 3 +5V 12−Bit DAC7513 3.0 V 1 2V PP 1A 0V to 3V RL V CC RE F30 30 47µF OPA561 1.2 V 0.
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− 5V C5 22pF C2 0.1 µ F C6 22 pF 13 11.059 2M Hz 1 2 6 12 5 7 NC 25 NC 26 NC 14 RX/TX RES ET CLR /T TXD RXD C1 10 µ F X TA L2 RX /TX RE SE T CLR/T TX D RX D RX DEM RX FO TX FI X TA L1 C4 10µF C3 0.1µF A V SS DVS S 21 18 3.3V MSP 43 0 23 AV DD 9 DV DD 15 CHS 16 BRS ST 753 6 C3 0.1µ F 20 TE ST 1 TE ST 2 TE ST 3 TE ST 4 ALCI AFCF 10 11 4 3 27 17 28 A TO 24 R AI DE MI 19 IFO A GND DGND 22 8 +5V R1 1.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.