Datasheet AD8418A (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | Bidirectional, Zero-Drift, Current Sense Amplifier |
| 页数 / 页 | 17 / 3 — Data Sheet. AD8418A. SPECIFICATIONS. Table 2. Parameter. Test … |
| 修订版 | D |
| 文件格式/大小 | PDF / 421 Kb |
| 文件语言 | 英语 |
Data Sheet. AD8418A. SPECIFICATIONS. Table 2. Parameter. Test Conditions/Comments. Min. Typ. Max. Unit
文件文字版本
Data Sheet AD8418A SPECIFICATIONS
TA = −40°C to +125°C (operating temperature range) for the AD8418AWB, TA = −40°C to +150°C for the AD8418AWH, 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 −5 +5 ppm/°C VOLTAGE OFFSET Offset Voltage, Referred to the Input, RTI 25°C ±100 µV Over Temperature, RTI Specified temperature range ±200 µV Offset Drift −0.4 +0.1 +0.4 µV/°C INPUT Input Bias Current 130 µA +IN = −IN = 12 V, VREF1 = VREF2 = 2.5 V, AD8418AWB 260 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 0.032 VS − 0.032 V Output Resistance 2 Ω Maximum Capacitive Load No continuous oscillation 0 500 pF 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 0.4985 0.5015 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 0.032 VS − 0.032 V POWER SUPPLY Operating Range 2.7 5.5 V Quiescent Current Over Temperature VOUT = 0.1 V dc AD8418AWB 4.1 mA AD8418AWH 4.2 mA Power Supply Rejection Ratio 80 dB TEMPERATURE RANGE For Specified Performance Operating temperature range AD8418AWB −40 +125 °C AD8418AWH −40 +150 °C 1 The offset adjustment is ratiometric to the power supply when VREF1 and VREF2 are used as a divider between the supplies. Rev. D | Page 3 of 17 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 Mode VS Referenced Output Mode 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
TA = −40°C to +125°C (operating temperature range) for the AD8418AWB, TA = −40°C to +150°C for the AD8418AWH, 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 −5 +5 ppm/°C VOLTAGE OFFSET Offset Voltage, Referred to the Input, RTI 25°C ±100 µV Over Temperature, RTI Specified temperature range ±200 µV Offset Drift −0.4 +0.1 +0.4 µV/°C INPUT Input Bias Current 130 µA +IN = −IN = 12 V, VREF1 = VREF2 = 2.5 V, AD8418AWB 260 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 0.032 VS − 0.032 V Output Resistance 2 Ω Maximum Capacitive Load No continuous oscillation 0 500 pF 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 0.4985 0.5015 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 0.032 VS − 0.032 V POWER SUPPLY Operating Range 2.7 5.5 V Quiescent Current Over Temperature VOUT = 0.1 V dc AD8418AWB 4.1 mA AD8418AWH 4.2 mA Power Supply Rejection Ratio 80 dB TEMPERATURE RANGE For Specified Performance Operating temperature range AD8418AWB −40 +125 °C AD8418AWH −40 +150 °C 1 The offset adjustment is ratiometric to the power supply when VREF1 and VREF2 are used as a divider between the supplies. Rev. D | Page 3 of 17 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 Mode VS Referenced Output Mode 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