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AD8205: Single Supply 42 V System Difference Amplifier Data Sheet (Rev. D)9/28/2006PDF308 kB
Overview
Features and Benefits
- 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: Y and W grade
−40°C to +150°C: H grade - Bidirectional operation
- Available in 8-Lead SOIC.
- EXCELLENT AC AND DC
PERFORMANCE
15 µV/°C offset drift
30 ppm/°C gain drift
80 dB CMRR dc to 20 kHz - Qualified for Automotive Applications
Product Details
The AD8205 is a single-supply difference amplifier for amplify-ing 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 VREF1 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 VREF1 and VREF2 pins.
Applications
High-side current sensing in:
- Motor controls
- Transmission controls
- Diesel injection controls
- Engine management
- Suspension controls
- Vehicle dynamic controls
- DC-to-dc converters
Product Categories
Markets and Technologies
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
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AN-282: Fundamentals of Sampled Data Systems2/14/2015PDF2131 kB
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AN-669: Effectively Applying the AD628 Precision Gain Block (Rev. 0)2/14/2015PDF193 kB
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AN-671: Reducing RFI Rectification Errors in In-Amp Circuits11/23/2004PDF208 kB
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Auto-Zero Amplifiers3/1/2010DOC75 kB
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High-performance Adder Uses Instrumentation Amplifiers9/3/2009
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Current Measurement in Solenoids for Automotive Control Systems4/1/2004 Analog Dialogue
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Input Filter Prevents Instrumentation-amp RF-Rectification Errors11/13/2003
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The AD8221 - Setting a New Industry Standard for Instrumentation Amplifiers1/1/2000PDF582 kB
Tools & Simulations
LTspice
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
AD8205
SPICE Models
CIR
AD8205 SPICE Macro Model
3.24 K
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| AD8205WHRZ | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8205WHRZ-RL | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8205WYRZ | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8205WYRZ-R7 | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8205WYRZ-RL | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8205YRZ | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8205YRZ-R7 | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8205YRZ-RL | Material Declaration | Reliability Data | 8-Lead SOIC | |
| Wafer Fabrication Data |
PCN-PDN Information
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AD8205 Discussions
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