Single-Supply, 42 V System
Difference Amplifier
AD8206
FUNCTIONAL BLOCK DIAGRAM
FEATURES
Ideal for current shunt applications
High common-mode voltage range
−2 V to +65 V operating
−5 V to +68 V survival
V+
6
+IN
–IN
8
1
5
OUT
Gain = 20
Wide operating temperature range
Die: −40°C to +150°C
8-lead SOIC: −40°C to +125°C
Adjustable offset
7
3
V
1
2
AD8206
REF
V
REF
4
NC
Available in SOIC and die form
2
GND
NC = NO CONNECT
EXCELLENT AC AND DC PERFORMANCE
Figure 1.
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 AD8206 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.
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 0.08 V to 4.7 V with
a 5 V supply by using the VREF1 and VREF2 pins. With VREF
1
The AD8206 is offered in die and packaged form. The operating
temperature range for the die is 25°C higher (up to 150°C) than
the packaged part to enable the user to apply the AD8206 in
high temperature applications.
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.
Rev. 0
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 registeredtrademarks arethe property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
www.analog.com
© 2005 Analog Devices, Inc. All rights reserved.