OP281 Analog Devices, OP281 Datasheet
OP281
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OP281 Summary of contents
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... The output’s ability to swing rail-to-rail and not increase supply current when the output is driven to a supply voltage enables the OP281/OP481 to be used as comparators in very low power systems. This is enhanced by their fast saturation recovery time. Propagation delays are 250 μs. ...
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... OP281/OP481 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Pin Configurations ........................................................................... 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Electrical Specifications ............................................................... 3 Absolute Maximum Ratings ............................................................ 6 Thermal Resistance ...................................................................... 6 ESD Caution .................................................................................. 6 Typical Performance Characteristics ............................................. 7 Applications ..................................................................................... 13 REVISION HISTORY 9/08—Rev Rev. D Changes to Figure 40 ...................................................................... 14 Changes to Low-Side Current Monitor Section ......................... 15 Changes to Figure 42 ...................................................................... 15 10/07— ...
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... R = 100 kΩ 20 GBP φ p-p 0 kHz Rev Page OP281/OP481 Min Typ Max 1 ≤ +85° ≤ +85°C 2.925 2.96 A ≤ +85° ± ...
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... OP281/OP481 25°C, unless otherwise noted Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage 1 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 ...
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... SY O –40°C ≤ T ≤ +85° 100 kΩ GBP φ p-p 0 kHz kHz i n Rev Page OP281/OP481 Min Typ Max 0.1 1.5 2 0.1 7 –5 +4 ≤ +85° ≤ +85°C ±4.925 ± ...
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... OP281/OP481 ABSOLUTE MAXIMUM RATINGS Table 4. Parameter Supply Voltage Input Voltage Differential Input Voltage Output Short-Circuit Duration to GND Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature Range (Soldering, 60 sec) Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only ...
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... Rev Page OP281/OP481 –40 – TEMPERATURE (°C) Figure 8. Input Bias Current vs. Temperature 1 25° 0.5 1.0 1.5 2.0 2.5 3.0 3 ...
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... OP281/OP481 10000 25°C A 1000 100 SOURCE SINK LOAD CURRENT (µA) Figure 11. Output Voltage to Supply Rail vs. Load Current 1000 25°C A 100 SOURCE SINK LOAD CURRENT (µA) Figure 12. Output Voltage to Supply Rail vs. Load Current 1000 V = ± ...
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... Figure 22. Small-Signal Overshoot vs. Load Capacitance Rev Page OP281/OP481 ± + +3V S 10k 100k 1M FREQUENCY (Hz) Figure 20. CMRR vs. Frequency V = ±5V, +5V, +3V, +2. 25° ∞ L 100 1k ...
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... OP281/OP481 100 1k FREQUENCY (Hz) Figure 23. Maximum Output Swing vs. Frequency 100 1k FREQUENCY (Hz) Figure 24. Maximum Output Swing vs. Frequency 4 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 –40 – TEMPERATURE (°C) Figure 25. Supply Current/Amplifier vs. Temperature 4 p 25° ∞ L 3.5 3.0 2.5 2.0 1.5 1.0 0.5 10k 100k 3 ...
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... 500mV 100kΩ 50pF 100 25° Rev Page OP281/OP481 V = 2.75V A2 0. 100kΩ 50pF 25°C A 100µs Figure 31. Large-Signal Transient Response 2. 25°C ...
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... OP281/OP481 V = ±1.35V ∞ L 100 500mV 500mV 50µs Figure 33. Saturation Recovery Time A2 0V 100 500mV 100µs Figure 34. Saturation Recovery Time 120 V = ±1V p-p 105 2kHz –15 –30 CIRCUIT = A VOL 25°C ...
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... OUT 0.1V Figure 38. Input and Output Signals with V Rev Page OP281/OP481 3 EE 100kΩ +3V 100kΩ V 100kΩ OUT OP281 + V = 1kHz AT IN 400mV p-p 100kΩ – –0.1V Operating at V < However, the op amp can operate 0.2ms 0V < ...
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... V stay at the negative rail, in this case ground, as long as the input voltage is less than V OP281 (A2) will stay at ground as long the input voltage is higher than V outputs of both op amps will With no current flowing in either D1 or D2, the base of Q1 will stay at ground, putting the ...
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... GROUND BATTERY-POWERED TELEPHONE HEADSET AMPLIFIER Figure 45 shows how the OP281 can be used as a two-way amplifier in a telephone headset. One side of the OP281 can be used as an amplifier for the microphone, and the other side can be used to drive the speaker. A typical telephone headset uses a 600 Ω ...
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... Two 1 MΩ MIC OUT resistors are used to provide the dc offset for single-supply use. The OP281-B amplifier (see Figure 45) can provide gain for the headset speaker. Incoming audio signals are ac-coupled kΩ potentiometer that is used to adjust the volume. Again, two 1 MΩ ...
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... SEATING 0.51 (0.0201) 0.25 (0.0098) PLANE 0.31 (0.0122) 0.17 (0.0067) COMPLIANT TO JEDEC STANDARDS MS-012-AB Figure 47. 14-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-14) Dimensions shown in millimeters and (inches) Rev Page OP281/OP481 0.50 (0.0196) 45° 0.25 (0.0099) 1.27 (0.0500) 0.40 (0.0157) 0.50 (0.0197) 45° 0.25 (0.0098) 8° 0° 1.27 (0.0500) 0.40 (0.0157) ...
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... OP281GRUZ-REEL –40°C to +85°C OP281GS –40°C to +85°C OP281GS-REEL –40°C to +85°C OP281GS-REEL7 –40°C to +85°C 1 OP281GSZ –40°C to +85°C 1 OP281GSZ-REEL –40°C to +85°C 1 OP281GSZ-REEL7 –40°C to +85°C OP481GRU-REEL –40°C to +85°C 1 OP481GRUZ-REEL – ...
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... NOTES Rev Page OP281/OP481 ...
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... OP281/OP481 NOTES ©1996–2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D00291-0-9/08(D) Rev Page ...