Datasheet AD8418 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | Bidirectional, Zero-Drift, Current Sense Amplifier |
| Pages / Page | 16 / 3 — Data Sheet. AD8418. SPECIFICATIONS. Table 2. Parameter. Test … |
| File Format / Size | PDF / 301 Kb |
| Document Language | English |
Data Sheet. AD8418. SPECIFICATIONS. Table 2. Parameter. Test Conditions/Comments. Min. Typ. Max. Unit
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Data Sheet AD8418 SPECIFICATIONS
TA = −40°C to +125°C (operating temperature range), VS = 5 V, unless otherwise noted.
Table 2. Parameter Test Conditions/Comments Min Typ Max Unit
GAIN Initial 20 V/V Error Over Temperature Specified temperature range ±0.15 % Gain vs. Temperature −8 +8 ppm/°C VOLTAGE OFFSET Offset Voltage, Referred to the Input (RTI) 25°C ±200 µV Over Temperature (RTI) Specified temperature range ±400 µV Offset Drift −1 +0.1 +1 µV/°C INPUT Input Bias Current 130 µA Input Voltage Range Common mode, continuous −2 +70 V Common-Mode Rejection Ratio (CMRR) Specified temperature range, f = dc 90 100 dB f = dc to 10 kHz 86 dB OUTPUT Output Voltage Range RL = 25 kΩ 0.015 VS − 0.020 V Output Resistance 2 Ω DYNAMIC RESPONSE Small Signal −3 dB Bandwidth 250 kHz Slew Rate 1 V/µs NOISE 0.1 Hz to 10 Hz (RTI) 2.3 µV p-p Spectral Density, 1 kHz (RTI) 110 nV/√Hz OFFSET ADJUSTMENT Ratiometric Accuracy1 Divider to supplies 0.4995 0.5005 V/V Accuracy, Referred to the Output (RTO) Voltage applied to VREF1 and VREF2 in parallel ±1 mV/V Output Offset Adjustment Range VS = 5 V 0.015 VS − 0.020 V POWER SUPPLY Operating Range 2.7 5.5 V Quiescent Current Over Temperature VOUT = 0.1 V dc 2.6 mA Power Supply Rejection Ratio 80 dB Temperature Range For Specified Performance Operating temperature range −40 +125 °C 1 The offset adjustment is ratiometric to the power supply when VREF1 and VREF2 are used as a divider between the supplies. Rev. 0 | Page 3 of 16 Document Outline Features Applications General Description Functional Block Diagram Table of Contents Revision History Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Output Offset Adjustment Unidirectional Operation Ground Referenced Output VS Referenced Output Bidirectional Operation External Referenced Output Splitting the Supply Splitting an External Reference Applications Information Motor Control 3-Phase Motor Control H-Bridge Motor Control Solenoid Control High-Side Current Sense with a Low-Side Switch High-Side Current Sense with a High-Side Switch High Rail Current Sensing Outline Dimensions Ordering Guide Automotive Products
Data Sheet AD8418 SPECIFICATIONS
TA = −40°C to +125°C (operating temperature range), VS = 5 V, unless otherwise noted.
Table 2. Parameter Test Conditions/Comments Min Typ Max Unit
GAIN Initial 20 V/V Error Over Temperature Specified temperature range ±0.15 % Gain vs. Temperature −8 +8 ppm/°C VOLTAGE OFFSET Offset Voltage, Referred to the Input (RTI) 25°C ±200 µV Over Temperature (RTI) Specified temperature range ±400 µV Offset Drift −1 +0.1 +1 µV/°C INPUT Input Bias Current 130 µA Input Voltage Range Common mode, continuous −2 +70 V Common-Mode Rejection Ratio (CMRR) Specified temperature range, f = dc 90 100 dB f = dc to 10 kHz 86 dB OUTPUT Output Voltage Range RL = 25 kΩ 0.015 VS − 0.020 V Output Resistance 2 Ω DYNAMIC RESPONSE Small Signal −3 dB Bandwidth 250 kHz Slew Rate 1 V/µs NOISE 0.1 Hz to 10 Hz (RTI) 2.3 µV p-p Spectral Density, 1 kHz (RTI) 110 nV/√Hz OFFSET ADJUSTMENT Ratiometric Accuracy1 Divider to supplies 0.4995 0.5005 V/V Accuracy, Referred to the Output (RTO) Voltage applied to VREF1 and VREF2 in parallel ±1 mV/V Output Offset Adjustment Range VS = 5 V 0.015 VS − 0.020 V POWER SUPPLY Operating Range 2.7 5.5 V Quiescent Current Over Temperature VOUT = 0.1 V dc 2.6 mA Power Supply Rejection Ratio 80 dB Temperature Range For Specified Performance Operating temperature range −40 +125 °C 1 The offset adjustment is ratiometric to the power supply when VREF1 and VREF2 are used as a divider between the supplies. Rev. 0 | Page 3 of 16 Document Outline Features Applications General Description Functional Block Diagram Table of Contents Revision History Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Output Offset Adjustment Unidirectional Operation Ground Referenced Output VS Referenced Output Bidirectional Operation External Referenced Output Splitting the Supply Splitting an External Reference Applications Information Motor Control 3-Phase Motor Control H-Bridge Motor Control Solenoid Control High-Side Current Sense with a Low-Side Switch High-Side Current Sense with a High-Side Switch High Rail Current Sensing Outline Dimensions Ordering Guide Automotive Products
