OPA671 Wide Bandwidth, Fast Settling Difet OPERATIONAL AMPLIFIER

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OPA671 Wide Bandwidth, Fast Settling Difet OPERATIONAL AMPLIFIER

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OPA671
Wide Bandwidth, Fast Settling Difet OPERATIONAL AMPLIFIER
FEATURES
HIGH GAIN-BANDWIDTH: 35MHz INPUT NOISE: 10nV/Hz HIGH SLEW RATE: 100V/µs FAST SETTLING: 240ns 0.01% INPUT: 50pA HIGH OUTPUT CURRENT: 50mA WIDE SUPPLY RANGE: ±4.5 ±18V
DESCRIPTION
OPA671 FET-input monolithic operational amplifier featuring wide bandwidth fast settling time. Fabricated using Burr-Brown's Difet, complementary bipolar process, provides excellent combination high speed, accuracy, high output current. OPA671 versatile, operating from ±4.5V ±18V power supplies. deliver ±10V signals into load slew rates 100V/µs. OPA671's Difet input provides input bias current thousands times lower than bipolar-input wideband amps. OPA671 internally compensated unity-gain stable, allowing widest range applications. OPA671 available 8-pin plastic DIP, rated industrial temperature range.
APPLICATIONS
HIGH-SPEED DATA ACQUISITION OPTOELECTRONICS TRANSIMPEDANCE AMPLIFIER LINE DRIVER BUFFER AMPLIFIER
Trim Trim
Difet® Burr-Brown Corporation
International Airport Industrial Park Mailing Address: 11400, Tucson, 85734 Street Address: 6730 Tucson Blvd., Tucson, 85706 Tel: (520) 746-1111 Twx: 910-952-1111 Internet: http://www.burr-brown.com/ FAXLine: (800) 548-6133 (US/Canada Only) Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132
1991 Burr-Brown Corporation
PDS-1120D
Printed U.S.A. October, 1993
SBOS009
SPECIFICATIONS
+25°C, ±15V, unless otherwise noted. OPA671AP PARAMETER OFFSET VOLTAGE Input Offset Voltage Average Drift Power Supply Rejection INPUT BIAS CURRENT(1) Input Bias Current Input Offset Current NOISE Input Voltage Noise Noise Density, 100Hz 1kHz 10kHz 100kHz Voltage Noise, 10Hz 1MHz Input Bias Current Noise Current Noise Density, 10Hz 1MHz INPUT VOLTAGE RANGE Common-Mode Input Range Common-Mode Rejection INPUT IMPEDANCE Differential Common-Mode OPEN-LOOP GAIN Open-Loop Voltage Gain FREQUENCY RESPONSE Gain-Bandwidth Product Slew Rate Settling Time 0.01% 0.1% Total Harmonic Distortion OUTPUT Voltage Output Current Output Short Circuit Current Output Resistance, Open-Loop POWER SUPPLY Specified Operating Voltage Operating Voltage Range Quiescent Current TEMPERATURE RANGE Specification Operating Storage Thermal Resistance, NOTE: Tested without warm-up 25°C. ±10V, ±10V, CONDITION ±0.5 UNITS µV/°C
±4.5 ±16.5V
1012 1012 0.0006
nV/Hz nV/Hz nV/Hz nV/Hz µVp-p fA/Hz V/µs
±10V
Step Step Step Step 100kHz ±10V ±10.5
±11.5 -90/+105 ±14.8
°C/W
±15V
±4.5
+100 +125
Junction Ambient
information provided herein believed reliable; however, BURR-BROWN assumes responsibility inaccuracies omissions. BURR-BROWN assumes responsibility this information, such information shall entirely user's risk. Prices specifications subject change without notice. patent rights licenses circuits described herein implied granted third party. BURR-BROWN does authorize warrant BURR-BROWN product life support devices and/or systems.
OPA671
CONFIGURATION
View
ELECTROSTATIC DISCHARGE SENSITIVITY
integrated circuit damaged ESD. Burr-Brown recommends that integrated circuits handled with appropriate precautions. Failure observe proper handling installation procedures cause damage. damage range from subtle performance degradation complete device failure. Precision integrated circuits more susceptible damage because very small parametric changes could cause device meet published specifications. PACKAGE/ORDERING INFORMATION
PACKAGE DRAWING NUMBER(1) TEMPERATURE RANGE -25°C +85°C
Trim
Trim
Internal Connection
ABSOLUTE MAXIMUM RATINGS
Power Supply Voltage ±18V Input Voltage (V+) (V-) Operating Temperature -40°C +100°C Storage Temperature -40°C +125°C Output Short-Circuit Ground Junction Temperature +150°C Lead Temperature (soldering, 10s) +300°C
PRODUCT OPA671AP
PACKAGE 8-Pin Plastic
NOTE: detailed drawing dimension table, please data sheet, Appendix Burr-Brown Data Book.
OPA671
TYPICAL PERFORMANCE CURVES
+25°C, ±15V unless otherwise noted.
OPEN-LOOP GAIN PHASE FREQUENCY
INPUT VOLTAGE NOISE SPECTRAL DENSITY
Gain (dB) 100k Gain
Voltage Noise (nV/
Phase
Phase
-135
-180
100M
100k
Frequency (Hz)
Frequency (Hz)
GAIN-BANDWIDTH PRODUCT SLEW RATE TEMPERATURE Gain-Bandwidth Product (MHz)
POWER SUPPLY REJECTION COMMON-MODE REJECTION TEMPERATURE
(dB)
Slew Rate (V/µs)
Temperature (°C)
Temperature (°C)
OPEN-LOOP GAIN TEMPERATURE
OPEN-LOOP GAIN LOAD RESISTANCE
Open-Loop Gain (dB)
Open-Loop Gain (dB)
Temperature (°C)
Load Resistance
OPA671
TYPICAL PERFORMANCE CURVES (CONT)
+25°C, ±15V unless otherwise noted.
POWER SUPPLY CURRENT TEMPERATURE 16.0
Power Supply Current (mA)
Short-Circuit Current (mA)
SHORT-CIRCUIT CURRENT TEMPERATURE
ISC+
15.5
15.0
14.5
14.0 Temperature (°C)
Temperature (°C)
INPUT BIAS CURRENT INPUT OFFSET CURRENT JUNCTION TEMPERATURE 1000
Input Bias Offset Current (pA)
TOTAL HARMONIC DISTORTION NOISE FREQUENCY 0.001
0.0004
0.0001 Frequency (Hz) 100k Junction Temperature (°C)
OUTPUT VOLTAGE SWING FREQUENCY
Output Voltage Swing (Vp-p)
100k Frequency (Hz) 100M
OPA671
TYPICAL PERFORMANCE CURVES (CONT)
+25°C, ±15V unless otherwise noted.
LARGE SIGNAL RESPONSE
SMALL SIGNAL RESPONSE
LARGE SIGNAL RESPONSE
SMALL SIGNAL RESPONSE
OPA671
CIRCUIT LAYOUT
With high-speed, wide-bandwidth circuitry, careful circuit layout will ensure best performance. Make short, direct circuit interconnections avoid stray wiring capacitance-especially inverting input pin. component-side ground plane will help ensure ground impedance. place ground plane under near inputs feedback network. power supply connections should bypassed with good high-frequency capacitors positioned close pins. most cases, both solid tantalum capacitor 0.1µF ceramic capacitor required each supply. OPA671 deliver peak load currents 100mA. Even steadystate load currents lower, signal transients demand large current transients from power supplies. power supply bypass capacitors which must supply these current transients. Larger bypass capacitors such 4.7µF solid tantalum capacitors improve dynamic performance some applications. OFFSET ADJUSTMENT Many applications require external offset voltage adjustment. Figure shows optional circuit trimming offset voltage. this offset voltage adjustment correct offsets produced other circuitry since this introduce large offset voltage temperature drift.
OPA671 Potentiometer (10k preferred)
250pF 100pF
100pF
10pF
1000pF 47pF
100pF
100pF
application bulletin AB-028 details circuits driving capacitive loads.
FIGURE Compensation Circuits Capacitive Loads. assure that maximum junction temperature exceeded. OPA671 operated reduced power supply voltage minimize power dissipation. OUTPUT CURRENT LIMIT Output current limited internal circuitry approximately 90mA 25°C. short-circuit limit current decreases with increasing junction temperature shown typical curves. current limit will protect device from inadvertent shortcircuits ground. internal power dissipation under this condition, however, quite high short-circuits should avoided. INPUT BIAS CURRENT OPA671 fabricated with Burr-Brown's dielectrically isolated Difet process, giving extremely input bias current. with other FET-input amplifiers, input bias current approximately doubles with every 10°C increase junction temperature. Input bias current minimized soldering device circuit board provided best heat dissipation. Reduced power supply voltage will also minimize input bias current reducing internal power dissipation. DEMONSTRATION BOARD OPA671 evaluated using high frequency board developed OPA65x family. This board ordered from your local Burr-Brown distribution part DEM-OPA65xP. comes partially assembled does include amplifier. Since this board intended amplifier, verify that electrolytic capacitors loaded board support higher supply voltages possible with OPA671.
FIGURE Optional Offset Voltage Trim Circuit. CAPACITIVE LOADS OPA671 internally compensated unity-gain stable with minimal capacitive load. combination closedloop gain capacitive load will decrease phase margin lead gain peaking oscillations. Load capacitance reacts with amp's open-loop output resistance form additional pole feedback loop. With wideband amps, load capacitance 50pF introduce enough phase shift degrade dynamic performance. Figure shows circuits which preserve phase margin with capacitive load. Request Application Bulletin AB-028 details various compensation circuits analysis techniques. POWER DISSIPATION High output current cause large internal power dissipation OPA671. Copper leadframe construction improves heat dissipation compared conventional plastic packages. achieve best heat dissipation, solder device directly circuit board wide circuit board traces close device pins. Limit ambient temperature, load signal
OPA671
IMPORTANT NOTICE Texas Instruments subsidiaries (TI) reserve right make changes their products discontinue product service without notice, advise customers obtain latest version relevant information verify, before placing orders, that information being relied current complete. products sold subject terms conditions sale supplied time order acknowledgment, including those pertaining warranty, patent infringement, limitation liability. warrants performance semiconductor products specifications applicable time sale accordance with TI's standard warranty. Testing other quality control techniques utilized extent deems necessary support this warranty. Specific testing parameters each device necessarily performed, except those mandated government requirements. Customers responsible their applications using components. order minimize risks associated with customer's applications, adequate design operating safeguards must provided customer minimize inherent procedural hazards. assumes liability applications assistance customer product design. does warrant represent that license, either express implied, granted under patent right, copyright, mask work right, other intellectual property right covering relating combination, machine, process which such semiconductor products services might used. TI's publication information regarding third party's products services does constitute TI's approval, warranty endorsement thereof.
Copyright 2000, Texas Instruments Incorporated

OPA671 Wide Bandwidth, Fast Settling Difet OPERATIONAL AMPLIFIER

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