Datasheet AD8205 (Analog Devices)

Single-Supply 42 V System Difference Amplifier Data Sheet AD8205 FEATURES FUNCTIONAL BLOCK DIAGRAM Ideal for current shunt applications V+ 6 High common-mode voltage range −2 V to +65 V operating +IN 8 5 OUT −25 V to +75 V survival –IN 1 Gain = 50 V/V Wide operating temperature range: AD8205 7 VREF1 −40°C to +125°C for Y and W grade −40°C to +150°C for H grade Bidirectional operation 3 VREF2 NC 4 Available in 8-lead SOIC 2 Qualified for automotive applications GND NC = NO CONNECT
04315-0-001 Figure 1.
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 GENERAL DESCRIPTION
The AD8205 is a single-supply difference amplifier for than 15 µV/°C, and gain drift is typically below 30 ppm/°C. amplifying smal differential voltages in the presence of large The output offset can be adjusted from 0.05 V to 4.8 V with a common-mode voltages. The operating input common-mode 5 V supply by using the VREF1 and VREF2 pins. With VREF1 voltage range extends from −2 V to +65 V. The typical single- attached to the V+ pin, and VREF2 attached to the GND pin, the supply voltage is 5 V. output is set at half scale. Attaching both pins to GND causes The AD8205 is offered in an 8-lead SOIC package and rated for the output to be unipolar, starting near ground. Attaching both operation from −40°C to +125°C for the Y and W grade pins to V+ causes the output to be unipolar starting near V+. models. The H grade version of the AD8205 is rated from Other offsets can be obtained by applying an external voltage to −40°C to +150°C. the VREF1 and VREF2 pins. Excellent dc performance over temperature keeps errors in the measurement loop to a minimum. Offset drift is typically less
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Document Outline Features Excellent AC and DC Performance 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 Output Offset Adjustment Unidirectional Operation Ground Referenced Output V+ Referenced Output Bidirectional Operation External Reference Output Splitting the Supply Splitting an External Reference Applications Information High-Side Current Sense with a Low-Side Switch High-Side Current Sense with a High-Side Switch Outline Dimensions Ordering Guide Automotive Products