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AD8202YRADN/a7avaiHigh Common-Mode Voltage, Single-Supply Difference Amplifier
AD8202YRMZADN/a3825avaiHigh Common-Mode Voltage, Single-Supply Difference Amplifier


AD8202YRMZ ,High Common-Mode Voltage, Single-Supply Difference AmplifierSPECIFICATIONS—SINGLE SUPPLY TA = operating temperature range, VS = 5 V, unless otherwise noted. Ta ..
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AD8202YR-AD8202YRMZ
High Common-Mode Voltage, Single-Supply Difference Amplifier
High Common-Mode Voltage,
Single-Supply Difference Amplifier

Rev. A
FEATURES
High common-mode voltage range
−8 V to +28 V at a 5 V supply voltage
Operating temperature range: −40°C to +125°C
Supply voltage range: 3.5 V to 12 V
Low-pass filter (1-pole or 2-pole)
EXCELLENT AC AND DC PERFORMANCE
±1 mV voltage offset
±1 ppm/°C typ gain drift
80 dB CMRR min dc to 10 kHz
PLATFORMS
Transmission control
Diesel injection control
Engine management
Adaptive suspension control
Vehicle dynamics control
FUNCTIONAL BLOCK DIAGRAM
+IN
–IN
GND
OUTA1A2+VS
NC = NO CONNECT

Figure 1. SOIC (R) Package Die Form
GENERAL DESCRIPTION

The AD8202 is a single-supply difference amplifier for amplifying
and low-pass filtering small differential voltages in the presence of a
large common-mode voltage. The input CMV range extends from
−8 V to +28 V at a typical supply voltage of 5 V.
The AD8202 is offered in die and packaged form. Both package
options are specified over a wide temperature range of −40°C to
+125°C, making the AD8202 well-suited for use in many auto-
motive platforms.
Automotive platforms demand precision components for better
system control. The AD8202 provides excellent ac and dc
performance, which keeps errors to a minimum in the user’s
system. Typical offset and gain drift in the SOIC package are
5 µV/°C and 1 ppm/°C, respectively. The device also delivers a
minimum CMRR of 80 dB from dc to 10 kHz.
The AD8202 features an externally accessible 100 kΩ resistor at
the output of the preamp A1, which can be used for low-pass
filter applications and for establishing gains other than 20.
OUTPUT
BATTERY

04981-0-002
Figure 2. High-Line Current Sensor
OUTPUT
BATTERY

04981-0-003
Figure 3. Low-Line Current Sensor
TABLE OF CONTENTS
Specifications—Single Supply.........................................................3
Absolute Maximum Ratings............................................................4
ESD Caution..................................................................................4
Pin Configuration and Function Descriptions.............................5
Typical Performance Characteristics.............................................6
Theory of Operation........................................................................8
Applications.......................................................................................9
Current Sensing............................................................................9
Gain Adjustment...........................................................................9
Gain Trim....................................................................................10
Low-Pass Filtering......................................................................10
High-Line Current Sensing with LPF
and Gain Adjustment.................................................................11
Driving Charge Redistribution ADCs.....................................11
Outline Dimensions.......................................................................12
Ordering Guide..........................................................................12
REVISION HISTORY
11/04—Rev. 0 to a Rev. A

Changes to the Features...................................................................1
Changes to the General Description..............................................1
Changes to Specifications (Table 1)...............................................3
Changes to Absolute Maximum Ratings (Table 2).......................4
Changes to Pin Function Descriptions (Table 3).........................5
Changes to Figure 5..........................................................................5
Changes to Figure 9 and Figure 10.................................................6
Updated Outline Dimensions.......................................................12
Changes to the Ordering Guide....................................................12
7/04—Revision 0: Initial Version
SPECIFICATIONS—SINGLE SUPPLY
TA = operating temperature range, VS = 5 V, unless otherwise noted.
Table 1.


1 Source imbalance < 2 Ω. The AD8202 preamplifier exceeds 80 dB CMRR at 10 kHz. However, since the signal is available only by way of a 100 kΩ resistor, even the small amount of pin-to-pin
capacitance between Pins 1, 8 and 3, 4 may couple an input common-mode signal larger than the greatly attenuated preamplifier output. The effect of pin-to-pin
coupling may be neglected in all applications by using filter capacitors at Node 3.
ABSOLUTE MAXIMUM RATINGS
Table 2.

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

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
–IN
GND
+IN
+VS
OUT
NC = NO CONNECT

04981-0-004
Figure 4. 8-Lead SOIC
Table 3. 8-Lead SOIC Pin Function Descriptions

1036µm+VS
1048µmGND
OUT
Figure 5. Metallization Photograph
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, VS = 5 V, VCM = 0 V, RL = 10 kΩ, unless otherwise noted.
FREQUENCY (Hz)
RR (dB)101001k10k100k

Figure 6. Power Supply Rejection Ratio vs. Frequency
FREQUENCY (Hz)
OUTP
UT (dB)1001k10k100k1M

Figure 7. AD8202 Bandwidth
FREQUENCY (Hz)
CMRR (dB)
100101001k10k100k

Figure 8. Common-Mode Rejection Ratio vs. Frequency
POWER SUPPLY (V)
COMMON-MODE
LTAGE
(V
–35345678910111213

Figure 9. Negative Common-Mode Voltage vs. Voltage Supply
POWER SUPPLY (V)
COMMON-MODE
LTAGE
(V3654871091112

04981-0-010
Figure 10. Positive Common-Mode Voltage vs. Voltage Supply
LOAD RESISTANCE (Ω)
OUTPUT SW
ING (
2.0101001k10k

Figure 11. Output Swing vs. Load Resistance
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