OP284 Analog Devices, OP284 Datasheet
OP284
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OP284 Summary of contents
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... These amplifiers are superb for single supply applications re- quiring both ac and precision dc performance. The combination of bandwidth, low noise and precision makes the OP184/OP284/ OP484 useful in a wide variety of applications, including filters and instrumentation. Other applications for these amplifiers include portable telecom equipment, power supply control and protection, and as amplifi- ers or buffers for transducers with wide output ranges ...
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... OP184/OP284/OP484–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter INPUT CHARACTERISTICS Offset Voltage “OP184/284E” Grade Offset Voltage “OP184/284F” Grade Offset Voltage OP184 “484E” Grade Offset Voltage OP184 “484F” Grade Input Bias Current Input Offset Current Input Voltage Range Common-Mode Rejection Ratio ...
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... C T +125 – +125 – +125 – +125 CMRR CMRR – PSRR 1.5 V, – +125 GBP kHz n –3– OP184/OP284/OP484 Min Typ Max Units 65 165 125 350 100 200 150 450 60 300 500 +125 +2.85 125 MHz nV/ Hz ...
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... Input Offset Voltage measurements are performed by automated test equipment approximately 0.5 seconds after application of power. Specifications subject to change without notice. WAFER TEST LIMITS (@ Parameter Offset Voltage OP284 Offset Voltage OP484 Input Bias Current Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Power Supply Rejection Ratio ...
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... V Output Short-Circuit Duration to GND Storage Temperature Range P, S Packages . . . . . . . . . . . . . . . . . . . . . . . – +150 C Operating Temperature Range OP184/OP284/OP484E – +125 C Junction Temperature Range P, S Packages . . . . . . . . . . . . . . . . . . . . . . . – +150 C Lead Temperature Range (Soldering 60 sec +300 C 3 ...
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... OP184/OP284/OP484–Typical Performance Characteristics 300 V = +3V 270 + 240 V = 1.5V CM 210 180 150 120 –100 –75 –50 – 100 INPUT OFFSET VOLTAGE – µV Figure 2. Input Offset Voltage Distribution 300 V = +5V 270 + 240 V = 2.5V CM 210 180 150 120 –100 –75 –50 –25 ...
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... Figure 15. Open-Loop Gain and Phase vs. Frequency (No Load) 2. 15V S 1.5k –10V < V < 10V + < V < 4V 500 –50 – 100 125 TEMPERATURE – C Figure 16. Open-Loop Gain vs. Temperature –7– OP184/OP284/OP484 + + –10 –20 –30 –40 10 100 1k 10k 100k 1M 10M FREQUENCY – Hz Figure 17. Closed-Loop Gain vs. Frequency (2 k Load 15V ...
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... OP184/OP284/OP484–Typical Performance Characteristics 300 V = +5V S 270 240 210 A = 100 V 180 150 120 10M 100 1k 10k 100k 1M FREQUENCY – Hz Figure 20. Output Impedance vs. Frequency 300 V = 15V 270 + 240 210 A = 100 180 V 150 120 10M 100 1k 10k 100k 1M FREQUENCY – Hz Figure 21. Output Impedance vs. ...
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... Figure 32. Settling Time vs. Step Size 15V 100k V 100 e = 0.3µVp 10mV Figure 33. 0 Noise +5V 100k V 100 e = 0.3µVp 10mV Figure 34. 0 Noise –9– OP184/OP284/OP484 160 T = +25 C 140 A 120 V = 15V S 100 + –20 –40 100 1k 10k 100k 1M 10M FREQUENCY – Hz Figure 35. Channel Separation vs. Frequency ...
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... A key issue in the input stage is the behavior of the input bias currents over the input common-mode voltage range. Input bias currents in the OP284 are the arithmetic sum of the base currents in Q1-Q3 and in Q2-Q4 result of this design approach, the input bias currents in the OP284 not only exhibit different amplitudes, but also exhibit different polarities ...
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... This input current is not inherently damaging to the device, provided that it is limited less. For the OP284, once the input exceeds the negative supply by 0.6 V, the input cur- rent quickly exceeds 5 mA. If this condition continues to exist, an external series resistor should be added at the expense of ad- ditional thermal noise ...
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... Determine Total Circuit Equivalent Input Noise Voltage and Noise Figure As a design aid, Figure 46 illustrates the total equivalent input noise of the OP284 and the total thermal noise of a resistor for comparison. Note that for source resistance less than the equivalent input noise voltage of the OP284 is dominant. ...
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... The recovery time is important in applications where the amplifier must recover quickly after a large transient event. The circuit shown in Figure 48 was used to evaluate the OP284’s overload recovery time. The OP284 takes approximately recover from positive saturation and approximately recover from negative saturation. ...
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... OP184/OP284/OP484 Only, 12-Bit DAC Swings Rail-to-Rail The OP284 is ideal for use with a CMOS DAC to generate a digitally-controlled voltage with a wide output range. Figure 51 shows a DAC8043 used in conjunction with the AD589 to gen- erate a voltage output from 1.23 V. The DAC is actually operating in “voltage switching” mode where the reference is ...
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... CMOS HI (OR OPEN OFF V COMMON IN Figure 55. A Low Dropout Regulator with Current Limiting REV. 0 Figure 55 shows such a regulator set up using an OP284 plus a µs low R , P-channel MOSFET pass device. Part of the low DS(ON) dropout performance of this circuit is provided by Q1, which has a rating of 0.11 ...
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... OP184/OP284/OP484 Obviously desirable to keep this comparison voltage small, since it becomes a significant portion of the overall dropout voltage. Here, the 20 mV reference, is higher than the typical offset of the OP284, but still reasonably low as a percentage of V (< 0.5%). In adapting the limiter for other I OUT ...
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... SPICE Macro-model 9/94 / Rev Copyright 1995 by Analog Devices * * Refer to “README.DOC” file for License Statement. Use of this model * indicates your acceptance of the terms and provisions in the License * Statement Node assignments * noninverting input * | inverting input * | | positive supply * | | | * | | | * | | | ...
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... OP184/OP284/OP484 FSCP 46 99 VSCP 1 RSCP Q20 QOP 1 Q18 QOP 4.5 Q19 QON 4.5 VSCN FSCN 50 47 VSCN 1 RSCN Q21 QON 1 CC2 31 45 20E-12 CF1 31 34 15E-12 CF2 31 42 15E-12 CO1 34 45 15E-12 CO2 42 45 5E- .MODEL DC D(IS=130E-21) .MODEL DX D() .MODEL DEN D(RS=100 KF=12E-15 AF=1) ...
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... SEATING 0.0160 (0.41) PLANE –19– OP184/OP284/OP484 14-Lead Epoxy DIP (P Suffix) 0.795 (20.19) 0.725 (18.42) 8 0.280 (7.11) 0.240 (6.10 0.325 (8.25) 0.195 (4.95) 0.060 (1.52) 0.300 (7.62) PIN 1 0 ...
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