OP270 Analog Devices, OP270 Datasheet
OP270
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OP270 Summary of contents
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... OP27 from Analog Devices, Inc. The OP270 features an input offset voltage of less than 75 μV and an offset drift of less than 1 μV/°C, guaranteed over the full military temperature range. Open-loop gain of the OP270 is more than 1,500,000 into a 10 kΩ load, ensuring excellent gain accuracy and linearity, even in high gain applications ...
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... Dual Programmable Gain Amplifier ....................................... 17 Outline Dimensions ....................................................................... 19 Ordering Guide .......................................................................... 20 4/03—Rev Rev. C Deletion of OP270A model ............................................... Universal Edits to Features ................................................................................. 1 Changes to Specifications ................................................................. 2 Deletion of Wafer Limits and Dice Characteristics ...................... 4 Changes to Absolute Maximum Ratings ........................................ 4 Changes to Ordering Guide ............................................................. 4 Changes to Equations in Noise Measurements section ............. 10 Change to Figure 10 ....................................................................... 11 Updated Outline Dimensions ....................................................... 14 11/02— ...
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... OP270 Unit μ p-p nV/√Hz nV/√Hz nV/√Hz pA/√Hz pA/√Hz pA/√Hz V/mV V/ μV/V V/μs mA MHz dB pF MΩ GΩ μs ...
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... L = ±10 V, 500 900 kΩ L ±12 ±12.5 ≥ 2 kΩ ±12 ±13 ±11 V 100 120 CM = ±4 ±18 V 0.7 5.6 S 4.4 7.2 Rev Page OP270F OP270G Min Typ Max Min Typ Max 45 275 100 400 0 600 1400 400 ...
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... J Operating Temperature Range 1 The OP270 inputs are protected by back-to-back diodes. To achieve low noise performance, current-limiting resistors are not used. If the differential voltage exceeds +10 V, the input current should be limited to ±25 mA. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress Rating rating only ...
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... OP270 TYPICAL PERFORMANCE CHARACTERISTICS 25° ±15V 1/f CORNER = 5Hz FREQUENCY (Hz) Figure 3. Voltage Noise Density vs. Frequency 25° 10kHz AT 1kHz ±5 ±10 SUPPLY VOLTAGE (V) Figure 4. Voltage Noise Density vs. Supply Voltage 0.1Hz TO 10Hz NOISE T = 25° ...
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... Figure 13. Total Supply Current vs. Supply Voltage ±15V 10.0 –75 –50 12.5 Figure 14. Total Supply Current vs. Temperature Rev Page OP270 T = 25° ±15V S 10 100 1k 10k 100k FREQUENCY (Hz) Figure 12. CMR vs. Frequency +125°C +25°C –55°C ±5 ±10 ± ...
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... OP270 140 120 100 80 +PSR 100 1k 10k 100k FREQUENCY (Hz) Figure 15. PSR vs. Frequency 140 120 100 100 1k 10k 100k FREQUENCY (Hz) Figure 16. Open-Loop Gain vs. Frequency –20 1k 10k 100k FREQUENCY (Hz) Figure 17. Closed-Loop Gain vs. Frequency T = 25°C A – ...
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... 100 V 10k 100k 1M FREQUENCY (Hz) Figure 24. Output Impedance vs. Frequency = ±15V –SR +SR –50 – 100 TEMPERATURE (°C) Figure 25. Slew Rate vs. Temperature = 25° ±15V S = 20V p-p TO 10kHz O 10 100 1k 10k 100k FREQUENCY (Hz) Figure 26. Channel Separation vs. Frequency OP270 = 1 10M 125 1M ...
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... OP270 0 25° ±15V 20V p 2kΩ L 0.01 0.001 10 100 FREQUENCY (Hz) Figure 27. Total Harmonic Distortion vs. Frequency T = 25° ±15V 2kΩ Figure 28. Large-Signal Transient Response 10k 20µs Rev Page 25° ±15V ...
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... TEST CIRCUITS 5kΩ 500Ω 1/2 V 20V OP270 1 p-p 5kΩ 50Ω 1/2 V OP270 2 CHANNEL SEPARATION = 20 LOG Figure 30. Channel Separation Test Circuit +18V 8 100kΩ 2 1/2 OP270 3 200kΩ 6 1/2 OP270 100kΩ –18V Figure 31. Burn-In Circuit Rev Page /1000 OP270 ...
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... OP270 APPLICATIONS INFORMATION VOLTAGE AND CURRENT NOISE The OP270 is a very low noise dual op amp, exhibiting a typical voltage noise density of only 3.2 nV/√ kHz. Because the voltage noise is inversely proportional to the square root of the collector current, the exceptionally low noise characteristic of the OP270 is achieved in part by operating the input transistors at high collector currents ...
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... B direct coupling is used. OP270 I <1500 Ω Low I is important to reduce self-magnetization problems in direct-coupled B applications. OP270 does not introduce any self-magnetization problems. <1500 Ω Used in rugged servo-feedback applications. The bandwidth of interest is 400 kHz. C1 2µF D1, D2 ...
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... Peak-to-Peak Voltage Noise The circuit of Figure test setup for measuring peak-to- peak voltage noise. To measure the 200 nV peak-to-peak noise specification of the OP270 in the 0 range, the following precautions must be observed: • The device has to be warmed up for at least five minutes. ...
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... CAPACITIVE LOAD DRIVING AND POWER SUPPLY CONSIDERATIONS The OP270 is unity-gain stable and capable of driving large capacitive loads without oscillating. Nonetheless, good supply bypassing is highly recommended. Proper supply bypassing reduces problems caused by supply line noise and improves the capacitive load driving capability of the OP270. ...
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... STAGES) –4 –5 LOW PHASE ERROR AMPLIFIER –6 –7 0.001 0.01 0.1 0.005 0.05 FREQUENCY RATIO (1/βω)(ω/ω Figure 42. Phase Error Comparison R2 1/2 3.3kΩ OP270E 1/2 OP270E R4 1kΩ R13 6.8µF L1 60Hz 680Ω 3.3kΩ TANTALUM R6 1kΩ 1µF L2 200Hz 680Ω ...
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... DAC8221 (a dual 12-bit CMOS DAC) to pan a signal between two channels. One channel is formed by the current output of DAC A driving one-half of an OP270 in a current-to-voltage converter configuration. The other channel is formed by the complementary output current of DAC A, which normally flows to ground through the AGND pin. This complementary current is converted to a voltage by the other half of the OP270, which also holds AGND at virtual ground ...
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... PINS 6 (MSB (LSB REF DGND 5 Figure 46. Dual Programmable Gain Amplifier BIAS +IN Figure 47. Simplified Schematic (One of Two Amplifiers Is Shown) Rev Page +15V 0.01µF + 10µF – 1/2 1 OP270EZ OUT 4 + 10µF 0.1µF – –15V 6 1/2 7 OP270GP OUT V+ OUT V– ...
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... COMPLIANT TO JEDEC STANDARDS MS-001 Figure 49. 8-Lead Plastic Dual In-Line Package [PDIP] Narrow Body P-Suffix (N-8) Dimensions shown in inches and (millimeters) Rev Page 0.320 (8.13) 0.290 (7.37) 0.015 (0.38) 15° 0.008 (0.20) 0° 0.325 (8.26) 0.310 (7.87) 0.300 (7.62) 0.195 (4.95) 0.130 (3.30) 0.115 (2.92) 0.014 (0.36) 0.010 (0.25) 0.008 (0.20) 0.430 (10.92) MAX OP270 ...
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... Max (μV) OS OP270EZ 75 OP270FZ 150 OP270GP 250 2 OP270GPZ OP270GS 250 OP270GS-REEL 2 OP270GSZ 2 OP270GSZ-REEL 1 θ is specified for worst-case mounting conditions, that is, θ JA printed circuit board for SOIC package RoHS Compliant Part. ©2001–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners ...