OPA644U BURR-BROWN [Burr-Brown Corporation], OPA644U Datasheet
OPA644U
Available stocks
Related parts for OPA644U
OPA644U Summary of contents
Page 1
Low Distortion Current Feedback OPERATIONAL AMPLIFIER FEATURES SLEW RATE: 2500V/ s VERY LOW DIFFERENTIAL GAIN/PHASE ERROR: 0.008%/0.009 LOW DISTORTION AT 5MHz: –85dBc HIGH BANDWIDTH: 500MHz HIGH OPEN LOOP TRANSIMPEDANCE: 2.0M HIGH LINEARITY FAST 12-BIT SETTLING: 21ns to 0.01% UNITY-GAIN ...
Page 2
... Specification: U Thermal Resistance 8-Pin SO-8 Specification same as OPA644U. NOTES: (1) Slew rate is rate of change from 10% to 90% of the output voltage step. (2) Time for the output to resume linear operation after saturation. ® OPA644 = 402 and all four power supply pins are used, unless otherwise noted. ...
Page 3
... PACKAGE /ORDERING INFORMATION PRODUCT PACKAGE OPA644U, UB SO-8 Surface Mount NOTE: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) The “B” grade of the SO-8 package will be marked with a “B” by pin 8. ...
Page 4
TYPICAL PERFORMANCE CURVES + 5V 100 , C = 2pF PSR AND CMR vs TEMPERATURE 80 PSR+ 70 PSR– CMR –75 –50 –25 0 ...
Page 5
TYPICAL PERFORMANCE CURVES + 5V 100 , C = 2pF HARMONIC DISTORTION vs FREQUENCY (G = +10 2Vp- –40 –60 – ...
Page 6
TYPICAL PERFORMANCE CURVES + 5V 100 , C = 2pF +1V/V CLOSED-LOOP SMALL SIGNAL BANDWIDTH Gain 0 –3 Closed-Loop Phase –6 –9 ...
Page 7
TYPICAL PERFORMANCE CURVES + 5V 100 , C = 2pF SMALL SIGNAL TRANSIENT RESPONSE ( 100 ) L 200 160 120 80 40 ...
Page 8
APPLICATIONS INFORMATION THEORY OF OPERATION This current feedback architecture offers the following im- portant advantages over voltage feedback architectures: (1) the high slew rate allows the large signal performance to approach the small signal performance, and: (2) there is very ...
Page 9
... Surface-mount components (chip resistors, capacitors, etc.) have low lead inductance and are therefore strongly recommended. Circuits using all surface-mount components with the OPA644U (SO-8 package) will offer the best AC performance. 6) Avoid overloading the output. Remember that output current must be provided by the amplifier to drive its own feedback network as well as to drive its load ...
Page 10
INPUT PROTECTION Static damage has been well recognized for MOSFET de- vices, but any semiconductor device deserves protection from this potentially damaging source. The OPA644 incor- porates on-chip ESD protection diodes as shown in Figure 3. This eliminates the need ...
Page 11
In general, capacitive loads should be minimized for opti- mum high frequency performance. Coax lines can be driven if the cable is properly terminated. The capacitance of coax cable (29pF/foot for RG-58) will not load the amplifier when the coaxial ...
Page 12
SPICE MODELS Computer simulation using SPICE is often useful when analyzing the performance of analog circuits and systems. This is particularly true for Video and RF amplifier circuits where parasitic capacitance and inductance can have a major effect on circuit ...
Page 13
R 200 G FIGURE 11. Wideband, Fast-Settling Instrumentation Amplifier. Input OPA644 402 499 100 FIGURE 12. Low Distortion ADC Amplifier (G = +5V/V). OPA644 R 402 F 402 R 402 F 402 402 OPA644 High Speed 12-, 14-, or 16-Bit ...