OP291 Analog Devices, OP291 Datasheet
OP291
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OP291 Summary of contents
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... The OP191/OP291/OP491 are specified over the extended industrial –40°C to +125°C temperature range. The OP191 single and OP291 dual amplifiers are available in 8-lead plastic SOIC surface-mount packages. The OP491 quad is available in a 14-lead PDIP, a narrow 14-lead SOIC package, and a 14-lead TSSOP ...
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... Single-Supply, Direct Access Arrangement for Modems...... Hz/60 Hz Active Notch Filter with False Ground..... 22 Single-Supply, Half-Wave, and Full-Wave Rectifiers............. 22 Outline Dimensions ....................................................................... 23 Ordering Guide .......................................................................... 24 3/04—Rev Rev. C. Changes to OP291 SOIC Pin Configuration .................................1 11/03—Rev Rev. B. Edits to General Description ...........................................................1 Edits to Pin Configuration ...............................................................1 Changes to Ordering Guide .............................................................5 Updated Outline Dimensions....................................................... 19 12/02— ...
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... T ≤ +125° −40°C ≤ T ≤ +125° kΩ L – kΩ distortion 0.01% S GBP θ kHz kΩ p-p 0 kHz Rev Page OP191/OP291/OP491 Min Typ Max Unit 80 500 μ 700 μ V/mV 50 V/mV 1.1 μV/°C 100 pA/° ...
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... 0 1 Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage OP191 OP291/OP491 Input Bias Current Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Offset Voltage Drift Bias Current Drift Offset Current Drift OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low ...
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... PSRR V = ± −40°C ≤ T ≤ +125° −40°C ≤ T ≤ +125°C A ± kΩ distortion 0.01% S GBP θ kHz e p-p 0 kHz Rev Page OP191/OP291/OP491 Min Typ Max Unit 80 500 μ 700 μ − 100 V/mV 1.1 μV/°C 100 pA/° ...
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... OP191/OP291/OP491 100 INPUT IN OUTPUT Figure 6. Input and Output with Inputs Overdriven Rev Page ±5V = 2kΩ 20V p-p 200μs ...
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... JA specified for device in socket for PDIP packages; θ for device soldered in circuit board for TSSOP and SOIC packages. Table 5. Thermal Resistance Package Type 8-Lead SOIC (R) 14-Lead PDIP (N) 14-Lead SOIC (R) 14-Lead TSSOP (RU) Rev Page OP191/OP291/OP491 specified JA θ θ Unit JA JC 158 43 ° ...
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... Figure 7. OP291 Input Offset Voltage Distribution, V 120 V S –40°C < T 100 BASED ON 600 OP AMPS INPUT OFFSET VOLTAGE (µV/°C) Figure 8. OP291 Input Offset Voltage Drift Distribution –0.02 –0.04 –0.06 –0.08 –0.10 –0.12 –0.14 –40 25 TEMPERATURE (°C) Figure 9. Input Offset Voltage vs. Temperature, V 0.14 0.22 ...
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... 25°C 140 A 120 100 –45 –20 –90 –40 1M 10M = 0.3V/2. 125 = Rev Page OP191/OP291/OP491 0 10 100 1k 10k 100k FREQUENCY (Hz) Figure 16. Closed-Loop Gain vs. Frequency 100 1k 10k 100k 1M FREQUENCY (Hz) Figure 17. CMRR vs. Frequency – TEMPERATURE (°C) Figure 18. CMRR vs. Temperature 25° 10M = 3 V CMRR ...
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... OP191/OP291/OP491 160 140 120 100 80 60 –PSRR –20 –40 100 1k 10k 100k FREQUENCY (Hz) Figure 19. PSRR vs. Frequency, V 113 112 111 110 109 108 107 –40 25 TEMPERATURE (°C) Figure 20. PSRR vs. Temperature 1.4 +SR 1.2 1.0 0.8 0.6 0.4 –SR 0.2 0 –40 25 TEMPERATURE (°C) Figure 21. Slew Rate vs. Temperature, V ± ...
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... INPUT OFFSET VOLTAGE (mV) Figure 25. OP291 Input Offset Voltage Distribution, V 120 –40°C < 100 BASED ON 600 OP AMPS INPUT OFFSET VOLTAGE (µV/°C) Figure 26. OP291 Input Offset Voltage Drift Distribution, V 0. –0.05 –0.10 – TEMPERATURE (°C) Figure 27. Input Offset Voltage vs. Temperature – ...
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... OP191/OP291/OP491 5.00 4.95 4.90 4. 2kΩ L 4.80 4. 4.70 –40 25 TEMPERATURE (°C) Figure 31. Output Voltage Swing vs. Temperature, V 160 140 120 100 –20 –40 100 1k 10k 100k FREQUENCY (Hz) Figure 32. Open-Loop Gain and Phase vs. Frequency, V 140 R = 100kΩ 120 L CM 100 100kΩ 2kΩ, V ...
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... FREQUENCY (Hz) Figure 37. PSRR vs. Frequency 0.6 0.5 0.4 +SR –SR 0.3 0.2 0.1 0 – TEMPERATURE (°C) Figure 38. OP291 Slew Rate vs. Temperature 0.45 0.40 +SR 0.35 –SR 0.30 0.25 0.20 0.15 0.10 0.05 0 – TEMPERATURE (°C) Figure 39. OP491 Slew Rate vs. Temperature ± ...
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... OP191/OP291/OP491 100 1k 10k FREQUENCY (Hz) Figure 43. Maximum Output Swing vs. Frequency, V 0.15 0. – +5V CM –0.05 –0.10 –40 25 TEMPERATURE (°C) Figure 44. Input Offset Voltage vs. Temperature ± + –10 – –5V CM –30 –40 –50 –40 25 TEMPERATURE (°C) Figure 45. Input Bias Current vs. Temperature 9.8V p-p ...
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... V S 160 V = ±5V S 140 T = 25°C A 120 100 –20 –40 1M 10M 100 = ± Rev Page OP191/OP291/OP491 CMRR 10k 100k 1M FREQUENCY (Hz) Figure 52. CMRR vs. Frequency ± ± TEMPERATURE (°C) Figure 53. CMRR vs. Temperature, V =± ±PSRR +PSRR –PSRR 1k 10k 100k 1M FREQUENCY (Hz) Figure 54. PSRR vs. Frequency ± ...
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... OP191/OP291/OP491 115 V = ±5V S 110 OP291 105 100 95 90 –40 25 TEMPERATURE (°C) Figure 55. OP291/OP491 PSRR vs. Temperature ±5V S 0.6 +SR 0.5 –SR 0.4 0.3 0.2 0.1 0 –40 25 TEMPERATURE (°C) Figure 56. Slew Rate vs. Temperature +100 V 100 0.1 1k 10k 100k FREQUENCY (Hz) Figure 57. Output Impedance vs. Frequency ...
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... V to 1.3 V below the positive rail. At voltages below this, the bias current flows out of the OP291, indicating a PNP input stage. Above this voltage, however, the bias current enters the device, revealing the NPN stage. The actual mechanism within the amplifier for switching between the input stages comprises Transistor Q3, Transistor Q4, and Transistor Q7 ...
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... V, internal PN junctions energize, allowing current to flow from the input to the supplies. As described, the OP291/OP491 do have 5 kΩ resistors in series with each input to help limit the current. Calculating the slope of the current vs. voltage in the graph confirms the 5 kΩ resistor. ...
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... APPLICATIONS SINGLE 3 V SUPPLY, INSTRUMENTATION AMPLIFIER The OP291 low supply current and low voltage operation make it ideal for battery-powered applications, such as the instrumentation amplifier shown in Figure 65. The circuit uses the classic two op amp instrumentation amplifier topology, with four resistors to set the gain. The equation is simply that of a noninverting amplifier, as shown in Figure 65 ...
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... Figure 68 Only, 12-Bit DAC Swings Rail-to-Rail The OP291 serves two functions. First required to buffer the high output impedance of the DAC V order of 10 kΩ. The op amp provides a low impedance output to drive any following circuitry. Second, the op amp amplifies the output signal to provide a rail-to-rail output swing. In this particular case, the gain is set to 4 ...
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... COLD JUNCTION COMPENSATED THERMOCOUPLE AMPLIFIER The OP291 low supply operation makes it ideal for 3 V battery- powered applications such as the thermocouple amplifier shown in Figure 70. The K-type thermocouple terminates in an isothermal block where the junction ambient temperature is continuously monitored using a simple 1N914 diode. The diode corrects the thermal EMF generated in the junctions by feeding a small voltage, scaled by the 1.5 MΩ ...
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... A full-wave rectifier can be configured with a pair of OP291s, as illustrated in Figure 73. The circuit works in the following way. When the input signal is above 0 V, the output of Amplifier A1 follows the input signal. ...
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... MAX 0.130 (3.30) 0.115 (2.92) PIN 1 1.05 0.014 (0.36) 1.00 0.010 (0.25) 0.80 0.008 (0.20) 0.430 (10.92) MAX Rev Page OP191/OP291/OP491 8.75 (0.3445) 8.55 (0.3366 6.20 (0.2441) 5.80 (0.2283 1.27 (0.0500) 1.75 (0.0689) BSC 1.35 (0.0531) 0.51 (0.0201) SEATING ...
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... OP191/OP291/OP491 ORDERING GUIDE Model OP191GS OP191GS-REEL OP191GS-REEL7 OP191GSZ 1 1 OP191GSZ-REEL OP191GSZ-REEL7 1 OP291GS OP291GS-REEL OP291GS-REEL7 1 OP291GSZ 1 OP291GSZ-REEL 1 OP291GSZ-REEL7 OP491GP 1 OP491GPZ OP491GS OP491GS-REEL OP491GS-REEL7 1 OP491GSZ 1 OP491GSZ-REEL OP491GSZ-REEL7 1 OP491GRU-REEL 1 OP491GRUZ-REEL OP491GBC Pb-free part. ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. ...