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AD8218BCPZ-WP 데이터시트(PDF) 3 Page - Analog Devices |
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AD8218BCPZ-WP 데이터시트(HTML) 3 Page - Analog Devices |
3 / 16 page Data Sheet AD8218 Rev. B | Page 3 of 16 SPECIFICATIONS TOPR = −40°C to +125°C, TA = 25°C, RL = 25 kΩ (RL is the output load resistor), input common-mode voltage (VCM) = 4 V, unless otherwise noted. Table 1. Parameter Min Typ Max Unit Test Conditions/Comments GAIN Initial 20 V/V Accuracy ±0.1 % VO ≥ 0.1 V dc, TA Accuracy over Temperature ±0.35 % TOPR Gain vs. Temperature ±5 ppm/°C TOPR VOLTAGE OFFSET Offset Voltage (RTI1) ±200 µV 25°C Over Temperature (RTI1) ±300 µV TOPR Offset Drift ±100 nV/°C TOPR INPUT Bias Current2 130 µA TA, input common mode = 4 V, VS = 4 V 220 µA TOPR, input common mode = 4 V, VS = 4 V Common-Mode Input Voltage Range 4 80 V Common-mode continuous Differential Input Voltage Range3 0 250 mV Differential input voltage Common-Mode Rejection (CMRR) 90 110 dB TOPR OUTPUT Output Voltage Range Low 0.01 V Output Voltage Range High VS − 0.1 V TA Output Impedance 2 Ω INTERNAL REFERENCE (ENB PIN CONNECTED TO GND) Initial Value 80 mV Voltage at OUT with a differential input of 0 V and a common-mode input of 4 V Offset (RTI1) −150 +150 µV Offset Drift (RTO4) ±10 µV/°C VS = NC or VS = 5 V REFERENCE INPUT (REF, PIN 7) Input Impedance 1.5 MΩ Input Current 3 60 µA Dependent on VREF/1.5 MΩ Input Voltage Range 0 5 V ENB not connected to GND Input-to-Output Gain 1 ± 0.0001 V/V DYNAMIC RESPONSE Small-Signal −3 dB Bandwidth 450 kHz Slew Rate 1 V/µs NOISE 0.1 Hz to 10 Hz (RTI1) 2.3 µV p-p Spectral Density, 1 kHz (RTI1) 110 nV/√Hz POWER SUPPLY Operating Range (Pin 2 Floating) 4 80 V Power regulated from common mode, VS pin floating VS Range (Pin 2) 4 5.5 V VS must be less than 5.5 V if standalone supply is used Quiescent Current over Temperature 800 µA Throughout input common mode Power Supply Rejection Ratio (PSRR) 90 110 dB TOPR TEMPERATURE RANGE For Specified Performance −40 +125 °C 1 RTI = referred to input. 2 Refer to Figure 9 for more information on the input bias current. This current varies based on the input common-mode voltage. The input bias current flowing to the +IN pin is also the supply current to the internal LDO. 3 The differential input voltage is specified as 250 mV because the output is internally clamped to 5.2 V. This ensures that the output voltage does not exceed the typical ADC input range, preventing damage. The AD8218 can survive up to ±5 V differentially but will only amplify ~250 mV correctly due to the output clamping function. 4 RTO = referred to output. |
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