Datasheet AD8208 (Analog Devices) - 3
| Hersteller | Analog Devices |
| Beschreibung | High Voltage, Precision Difference Amplifier |
| Seiten / Seite | 20 / 3 — Data Sheet. AD8208. SPECIFICATIONS. Table 1. Parameter. Test Conditions1. … |
| Revision | C |
| Dateiformat / Größe | PDF / 331 Kb |
| Dokumentensprache | Englisch |
Data Sheet. AD8208. SPECIFICATIONS. Table 1. Parameter. Test Conditions1. Min. Typ. Max. Unit
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Data Sheet AD8208 SPECIFICATIONS
TOPR = −40°C to +125°C for AD8208WBR and AD8208WBRM grade, TOPR = −40°C to +150°C for AD8208WHR grade, TA = 25°C, VS = 5 V, RL = 25 kΩ (RL is the output load resistor), unless otherwise noted. Specifications applicable for both packages (SOIC and MSOP).
Table 1. Parameter Test Conditions1 Min Typ Max Unit
SYSTEM GAIN Initial 20 V/V Error vs. Temperature 0.075 V ≤ VOUT ≤ (VS − 0.1 V), dc, TOPR ±0.3 % Gain Drift TOPR 0 −20 ppm/°C VOLTAGE OFFSET Initial Input Offset (Referred to Input [RTI]) VCM = 0.15 V, TA ±2 mV Input Offset (RTI) Over Temperature VCM = 0 V, TOPR ±4 mV Voltage Offset vs. Temperature VCM = 0 V, TOPR −20 +20 µV/°C INPUT Input Impedance Differential 360 400 440 kΩ Common Mode 180 200 220 kΩ VCM (Continuous) −2 +45 V CMRR2 VCM = −2 V to +45 V, dc 80 100 dB f = dc to 10 kHz,3 TOPR 80 dB PREAMPLIFIER (A1) Gain 10 V/V Gain Error 0.05 V ≤ VOUT ≤ (VS − 0.1 V), dc, TOPR −0.3 +0.3 % Output Voltage Range AD8208WBR, AD8208WBRM 0.0375 VS − 0.1 V AD8208WHR, AD8208WHRM 0.05 VS − 0.1 V Output Resistance 97 100 103 kΩ OUTPUT BUFFER (A2) Gain 2 V/V Gain Error 0.075 V ≤ VOUT ≤ (VS − 0.1 V), dc, TOPR −0.3 +0.3 % Output Voltage Range4, 5 RL = 25 kΩ, differential Input (V) = 0 V, TOPR Pin 3 (A1 output) driving Pin 4 (A2 input) AD8208WBR, AD8208WBRM 0.075 VS − 0.1 V AD8208WHR, AD8208WHRM 0.1 VS − 0.12 V Output Voltage Range6 Pin 4 (A2 input) driven with external source AD8208WBR, AD8208WBRM 0.075 VS − 0.1 V AD8208WHR, AD8208WHRM 0.1 VS − 0.12 V Input Bias Current TOPR 50 nA Output Resistance RL = 1 kΩ, frequency = dc 2 Ω DYNAMIC RESPONSE System Bandwidth VIN = 0.01 V p-p, VOUT = 0.14 V p-p 70 kHz Slew Rate VIN = 0.28 V, VOUT = 4 V step 1 V/µs NOISE 0.1 Hz to 10 Hz 20 µV p-p Spectral Density, 1 kHz (RTI) 500 nV/√Hz POWER SUPPLY Operating Range 4.5 5.5 V Quiescent Current Typical, TA 1.6 mA Quiescent Current vs. Temperature VOUT = 0.1 V dc, VS = 5 V, TOPR AD8208WBR, AD8208WBRM 2.7 mA AD8208WHR, AD8208WHRM 3.0 mA PSRR VS = 4.5 V to 5.5 V, TOPR 66 80 dB Rev. C | Page 3 of 20 Document Outline Features Applications Functional Block Diagram General Description Revision History Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Applications Information High-Side Current Sensing with a Low-Side Switch High-Rail Current Sensing Low-Side Current Sensing 4 mA to 20 mA Current Loop Receiver Gain Adjustment Gains Less than 20 Gains Greater than 20 Gain Trim Internal Signal Overload Considerations Low-Pass Filtering High Line Current Sensing with LPF and Gain Adjustment Outline Dimensions Ordering Guide Automotive Products
Data Sheet AD8208 SPECIFICATIONS
TOPR = −40°C to +125°C for AD8208WBR and AD8208WBRM grade, TOPR = −40°C to +150°C for AD8208WHR grade, TA = 25°C, VS = 5 V, RL = 25 kΩ (RL is the output load resistor), unless otherwise noted. Specifications applicable for both packages (SOIC and MSOP).
Table 1. Parameter Test Conditions1 Min Typ Max Unit
SYSTEM GAIN Initial 20 V/V Error vs. Temperature 0.075 V ≤ VOUT ≤ (VS − 0.1 V), dc, TOPR ±0.3 % Gain Drift TOPR 0 −20 ppm/°C VOLTAGE OFFSET Initial Input Offset (Referred to Input [RTI]) VCM = 0.15 V, TA ±2 mV Input Offset (RTI) Over Temperature VCM = 0 V, TOPR ±4 mV Voltage Offset vs. Temperature VCM = 0 V, TOPR −20 +20 µV/°C INPUT Input Impedance Differential 360 400 440 kΩ Common Mode 180 200 220 kΩ VCM (Continuous) −2 +45 V CMRR2 VCM = −2 V to +45 V, dc 80 100 dB f = dc to 10 kHz,3 TOPR 80 dB PREAMPLIFIER (A1) Gain 10 V/V Gain Error 0.05 V ≤ VOUT ≤ (VS − 0.1 V), dc, TOPR −0.3 +0.3 % Output Voltage Range AD8208WBR, AD8208WBRM 0.0375 VS − 0.1 V AD8208WHR, AD8208WHRM 0.05 VS − 0.1 V Output Resistance 97 100 103 kΩ OUTPUT BUFFER (A2) Gain 2 V/V Gain Error 0.075 V ≤ VOUT ≤ (VS − 0.1 V), dc, TOPR −0.3 +0.3 % Output Voltage Range4, 5 RL = 25 kΩ, differential Input (V) = 0 V, TOPR Pin 3 (A1 output) driving Pin 4 (A2 input) AD8208WBR, AD8208WBRM 0.075 VS − 0.1 V AD8208WHR, AD8208WHRM 0.1 VS − 0.12 V Output Voltage Range6 Pin 4 (A2 input) driven with external source AD8208WBR, AD8208WBRM 0.075 VS − 0.1 V AD8208WHR, AD8208WHRM 0.1 VS − 0.12 V Input Bias Current TOPR 50 nA Output Resistance RL = 1 kΩ, frequency = dc 2 Ω DYNAMIC RESPONSE System Bandwidth VIN = 0.01 V p-p, VOUT = 0.14 V p-p 70 kHz Slew Rate VIN = 0.28 V, VOUT = 4 V step 1 V/µs NOISE 0.1 Hz to 10 Hz 20 µV p-p Spectral Density, 1 kHz (RTI) 500 nV/√Hz POWER SUPPLY Operating Range 4.5 5.5 V Quiescent Current Typical, TA 1.6 mA Quiescent Current vs. Temperature VOUT = 0.1 V dc, VS = 5 V, TOPR AD8208WBR, AD8208WBRM 2.7 mA AD8208WHR, AD8208WHRM 3.0 mA PSRR VS = 4.5 V to 5.5 V, TOPR 66 80 dB Rev. C | Page 3 of 20 Document Outline Features Applications Functional Block Diagram General Description Revision History Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Applications Information High-Side Current Sensing with a Low-Side Switch High-Rail Current Sensing Low-Side Current Sensing 4 mA to 20 mA Current Loop Receiver Gain Adjustment Gains Less than 20 Gains Greater than 20 Gain Trim Internal Signal Overload Considerations Low-Pass Filtering High Line Current Sensing with LPF and Gain Adjustment Outline Dimensions Ordering Guide Automotive Products