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Rev. Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2004–2012 Analog Devices, Inc. All rights reserved.

FEATURES

Ideal for current shunt applications High common-mode voltage range −2 V to +65 V operating −25 V to +75 V survival Gain = 50 V/V Wide operating temperature range: −40°C to +125°C for Y and W grade −40°C to +150°C for H grade Bidirectional operation Available in 8-lead SOIC Qualified for automotive applications EXCELLENT AC AND DC PERFORMANCE 15 µV/°C offset drift 30 ppm/°C gain drift 80 dB CMRR dc to 20 kHz

APPLICATIONS

High-side current sensing in: Motor controls Transmission controls Diesel injection controls Engine management Suspension controls Vehicle dynamic controls DC-to-dc converters FUNCTIONAL BLOCK DIAGRAM 04315-0-001 AD8205 +IN –IN NC NC = NO CONNECT GND OUT VREF1 VREF2 Figure 1. GENERAL DESCRIPTION The AD8205 is a single-supply difference amplifier for amplifying small differential voltages in the presence of large common-mode voltages. The operating input common-mode voltage range extends from −2 V to +65 V . The typical single- supply voltage is 5 V . The AD8205 is offered in an 8-lead SOIC package and rated for operation from −40°C to +125°C for the Y and W grade models. The H grade version of the AD8205 is rated from −40°C to +150°C. Excellent dc performance over temperature keeps errors in the measurement loop to a minimum. Offset drift is typically less than 15 µV/°C, and gain drift is typically below 30 ppm/°C. The output offset can be adjusted from 0.05 V to 4.8 V with a

5 V supply by using the V

REF1 and VREF2 pins. With VREF1 attached to the V+ pin, and VREF2 attached to the GND pin, the output is set at half scale. Attaching both pins to GND causes the output to be unipolar, starting near ground. Attaching both pins to V+ causes the output to be unipolar starting near V+. Other offsets can be obtained by applying an external voltage to the V REF1 and VREF2 pins. D

Rev. D | Page 2 of 12 TABLE OF CONTENTS

REVISION HISTORY

4/12—Rev. C to Rev. D 3/12—Rev. B to Rev. C Added Radiometric Accuracy Maximum Parameter of 0.503 V/V , Operating Range Maximum Parameter of 5.5 V , and H Grade 7/10—Rev. A to Rev. B Changes to Features Section and General Description Section . 1 10/09—Rev. 0 to Rev. A 4/04—Revision 0: Initial Version

Rev. | Page 3 of 12 SPECIFICATIONS TA = operating temperature range, VS = 5 V, unless otherwise noted. Table 1. Parameter Test Conditions/Comments Y and W Grade H Grade Unit Min Typ Max Min Typ Max GAIN Initial 50 50 V/V Accuracy VO ≥ 0.1 V dc, 25°C ±1 ±1 % Accuracy Over Temperature Specified temperature range ±1.2 ±1.2 % Gain vs. Temperature ±30 ±30 ppm/°C VOL TAGE OFFSET Offset Voltage (RTI)1 25°C ±2 ±2 mV Over Temperature (RTI)1 Specified temperature range ±4.5 ±4.5 mV Offset Drift 15 15 µV/°C INPUT Input Impedance Differential 400 400 kΩ Common Mode 200 200 kΩ Input Voltage Range Common mode, continuous −2 65 −2 65 V Differential2 100 100 mV Common-Mode Rejection 25°C, f = dc to 20 kHz3 78 86 78 86 dB Operating temperature range, f = dc to 20 kHz3 76 80 76 80 dB OUTPUT Output Voltage Range RL = 25 kΩ 0.05 4.8 0.05 4.8 V Output Resistance 2 2 Ω DYNAMIC RESPONSE Small Signal −3 dB Bandwidth 50 50 kHz Slew Rate 0.5 0.5 V/µs NOISE

0.1 Hz to 10 Hz, RTI 20 20 µV p-p

Spectral Density, 1 kHz (RTI)1 0.5 0.5 µV/√Hz OFFSET ADJUSTMENT Ratiometric Accuracy4 Divider to supplies 0.497 0.503 0.497 0.503 V/V Accuracy, RTO Voltage applied to VREF1 and VREF2 in parallel ±2 ±2 mV/V Output Offset Adjustment Range VS = 5 V 0.05 4.8 0.05 4.8 V VREF Divider Resistor Values 24 32 40 24 32 40 kΩ POWER SUPPLY Operating Range 4.5 5.5 4.5 5.5 V Quiescent Current Over Temperature VO = 0.1 V dc 2 2.2 mA Power Supply Rejection Ratio 70 70 dB Temperature Range For Specified Performance Operating temperature range −40 +125 −40 +150 °C 1 RTI is referred to input. 2 Input voltage range = ±50 mV with half-scale offset. 3 Source imbalance < 2 Ω. 4 The offset adjustment is ratiometric to the power supply when VREF1 and VREF2 are used as a divider between the supplies. D

Rev. D | Page 4 of 12 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Rating Supply Voltage 12.5 V Continuous Input Voltage −25 V to +75 V Input Transient Survival −30 V to +80 V Differential Input Survival −25 V to +75 V Reverse Supply Voltage 0.3 V Operating Temperature Range Y and W Grade −40°C to +125°C H Grade −40°C to +150°C Storage Temperature −65 to +150C Output Short-Circuit Duration Indefinite Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ESD CAUTION

Figure 2. Metallization Diagram Figure 3. Pin Configuration Table 3. Pin Function Descriptions

2 GND −447 57

3 VREF2 −432 −457

4 NC N/A N/A

5 OUT 444 −472

6 V+ 444 −203

7 VREF1 456 434

Die size is 1170 µm by 1280 µm. Passivation type is 8KA USG (Oxide) + 10KA Oxynitride. Bond pad metal composition is 98.5% Al, 1% Si, and 0.5% Cu.

The gain of the AD8205 is 50 V/V , with an accuracy of 1.2%. operating temperature range for the packaged part. for unipolar and bipolar operation. created by a common-mode voltage is 0 V at the inputs of A1. A, RB, and RC is approximately 200 kΩ ± 20%. reference voltage of 250 mV biases the attenuator above ground.

1 V/V from the reference pins to the output when the reference

the resistor ratio matching to better than 0.01%. 300 µA current sink pull-down. Figure 13. Simplified Schematic

REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. Figure 22. 8-Lead Standard Small Outline Package [SOIC_N] 2 W = Qualified for Automotive Applications. ordering information and to obtain the specific Automotive Reliability reports for these models. registered trademarks are the prop erty of their respective owners.