AD8251ARMZ-RL Analog Devices Inc, AD8251ARMZ-RL Datasheet
AD8251ARMZ-RL
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AD8251ARMZ-RL Summary of contents
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FEATURES Small package: 10-lead MSOP Programmable gains Digital or pin-programmable gain setting Wide supply: ± ±15 V Excellent dc performance High CMRR (minimum Low gain drift: 10 ppm/°C (maximum) ...
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AD8251 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Diagram ........................................................................... 5 Absolute Maximum Ratings............................................................ 6 Maximum Power Dissipation ..................................................... 6 ESD Caution.................................................................................. 6 ...
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SPECIFICATIONS + −V = − REF Table 2. Parameter COMMON-MODE REJECTION RATIO (CMRR) CMRR with 1 kΩ Source Imbalance ...
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AD8251 Parameter Settling Time 0.001 Slew Rate Total Harmonic Distortion + Noise GAIN Gain Range Gain ...
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Parameter POWER SUPPLY Operating Range Quiescent Current Quiescent Current, −I S Over Temperature TEMPERATURE RANGE Specified Performance 1 Add time for the output to slew and settle to calculate the total time for a gain change. TIMING DIAGRAM ...
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AD8251 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter Supply Voltage Power Dissipation Output Short-Circuit Current Common-Mode Input Voltage Differential Input Voltage Digital Logic Inputs Storage Temperature Range 3 Operating Temperature Range Lead Temperature (Soldering, 10 sec) Junction Temperature θ (Four-Layer JEDEC ...
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PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic 1 −IN 2 DGND 3 − OUT REF 10 +IN –IN + DGND ...
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AD8251 TYPICAL PERFORMANCE CHARACTERISTICS T = 25° +15 V, −V = − 2700 2400 2100 1800 1500 1200 900 600 300 0 –120 –90 –60 – CMRR (µV/V) Figure 6. Typical ...
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Figure 12. 0 RTI Voltage Noise 100 1k FREQUENCY (Hz) Figure 13. Current Noise Spectral Density vs. Frequency 140pA/DIV Figure ...
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AD8251 –5 –10 –60 –40 – TEMPERATURE (ºC) Figure 18. Input Bias Current and Offset Current vs. Temperature 140 120 ...
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OUTPUT VOLTAGE (V) Figure 24. Gain Nonlinearity vs. Output Voltage –10 –20 –30 –40 –10 ...
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AD8251 +V S +85°C +125°C –1 +25°C –2 +2 –40°C +1 +125°C – SUPPLY VOLTAGE (±V Figure 30. Input Voltage Limit vs. Supply Voltage FAULT CONDITION (OVER DRIVEN INPUT) ...
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NO 47pF LOAD 20mV/DIV Figure 36. Small Signal Pulse Response for Various Capacitive Loads 5V/DIV 585ns TO 0.01% 723ns TO 0.001% 0.002%/DIV Figure 37. Large Signal Pulse Response and Settling Time kΩ L ...
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AD8251 25mV/DIV Figure 42. Small Signal Response kΩ 100 25mV/DIV Figure 43. Small Signal Response kΩ 100 25mV/DIV ...
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SETTLED TO 0.001% 600 400 SETTLED TO 0.01% 200 STEP SIZE (V) Figure 48. Settling Time vs. Step Size –50 –55 –60 –65 –70 –75 ...
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AD8251 THEORY OF OPERATION 2.2kΩ –IN +IN 2.2kΩ The AD8251 is a monolithic instrumentation amplifier based on the classic 3-op-amp topology, as shown in Figure 51 fabricated on the Analog Devices, Inc., proprietary iCMOS® process that provides precision, ...
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Table 5. Truth Table Logic Levels for Transparent Gain Mode −V Low Low S −V Low High S −V High Low S −V High High S Latched Gain Mode Some applications have multiple programmable devices such as ...
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AD8251 POWER SUPPLY REGULATION AND BYPASSING The AD8251 has high PSRR. However, for optimal performance, a stable dc voltage should be used to power the instrumentation amplifier. Noise on the supply pins can adversely affect per- formance all ...
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REFERENCE TERMINAL The reference terminal, REF one end kΩ resistor (see Figure 51). The instrumentation amplifier output is referenced to the voltage on the REF terminal; this is useful when the output signal needs to ...
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AD8251 RF INTERFERENCE RF rectification is often a problem when amplifiers are used in applications where there are strong RF signals. The disturbance can appear as a small dc offset voltage. High frequency signals can be filtered with a low-pass ...
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APPLICATIONS DIFFERENTIAL OUTPUT In certain applications necessary to create a differential signal. High resolution ADCs often require a differential input. In other cases, transmission over a long distance can require differential signals for better immunity to interference. Figure ...
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AD8251 DATA ACQUISITION The AD8251 makes an excellent instrumentation amplifier for use in data acquisition systems. Its wide bandwidth, low distortion, low settling time, and low noise enable it to condition signals in front of a variety of 16-bit ADCs. ...
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... OUTLINE DIMENSIONS IDENTIFIER ORDERING GUIDE Model 1 Temperature Range AD8251ARMZ −40°C to +85°C AD8251ARMZ-RL −40°C to +85°C AD8251ARMZ-R7 −40°C to +85°C AD8251-EVALZ RoHS Compliant Part. 3.10 3.00 2. 5.15 3.10 4.90 3.00 4.65 1 2.90 5 PIN 1 0.50 BSC 0.95 15° MAX ...
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AD8251 NOTES ©2007–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06287-0-11/10(B) Rev Page ...