ANALOG DEVICES AD8200 Service Manual

High Common-Mode Voltage, Single-Supply

5V

OUTPUT

INDUCTIVE
LOAD

4 TERM

SHUNT

CLAMP

DIODE

BATTERY

14V

POWER
DEVICE

COMMON

NC = NO CONNECT

GND

NC

–IN

+IN

A1

+V

S

A2

OUT

AD8200

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Difference Amplifier

AD8200

FEATURES
High Common-Mode Voltage Range –2 V to +24 V at a

5 V Supply Voltage

Operating Temperature Range

Die: –40C to +150C
Supply Voltage Range: 4.7 V to 12 V
Low-Pass Filter (One Pole or Two Pole)

EXCELLENT AC AND DC PERFORMANCE

1 mV Voltage Offset
10 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

GENERAL DESCRIPTION

The AD8200 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 –2 V to +24 V at a typical supply voltage of 5 V.

The AD8200 is offered in die and packaged form. Both package
options are specified over wide temperature ranges, making the
AD8200 well suited for use in many automotive platforms. The
SOIC package is specified over a temperature range of –40°C to
+125°C. The die is specified from –40°C to +150°C.

FUNCTIONAL BLOCK DIAGRAM

SOIC (R) Package

Die Form

+V

A2

S

AD8200

G =2

+IN

–IN

A2

10k

10k

GND

OUT

+IN

–IN

NC A1

100k

G =10

+IN

A1

–IN

200k200k

NC = NO CONNECT

Automotive platforms demand precision components for better
system control. The AD8200 provides excellent ac and dc per­formance that keeps errors to a minimum in the user’s system.
Typical offset and gain drift in the SOIC package are 6 µV/°C
and 10 ppm/°C, respectively. The device also delivers a mini­mum CMRR of 80 dB from dc to 10 kHz.

The AD8200 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.

INDUCTIVE

CLAMP

DIODE

BATTERY

REV. B

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. 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.

14V

Figure 1. High Line Current Sensor

POWER
DEVICE

COMMON

4 TERM

SHUNT

LOAD

+IN

–IN

5V

+V

NC

S

AD8200

GND

A1

NC = NO CONNECT

OUTPUT

OUT

A2

Figure 2. Low Line Current Sensor

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] © 2003 Analog Devices, Inc. All rights reserved.

AD8200–SPECIFICATIONS

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SINGLE SUPPLY

Parameter Condition Min Typ Max Min Typ Max Unit

SYSTEM GAIN

Initial 20 20 V/V
Error V
vs. Temperature 10 20 25 30 ppm/°C

VOLTAGE OFFSET

Input Offset (RTI) VCM = 0.15 V; 25°C–1 +1–1 +1mV

INPUT

Input Impedance

Differential 320 400 480 320 400 480 kΩ
Common-Mode 160 200 240 160 200 240 kΩ

CMV Continuous –2 +24 –2 +24 V

Common-Mode Rejection

PREAMPLIFIER

Gain 10 10 V/V
Gain Error –1 +1 –1 +1 %
Output Voltage Range 0.02 4.8 0.02 4.8 V
Output Resistance 97 100 103 97 100 103 kΩ

OUTPUT BUFFER

Gain 2 2 V/V
Gain Error –1 +1 –1 +1 %
Output Voltage Range 0.02 4.8 0.02 4.8 V
Output Resistance 2 2 Ω

DYNAMIC RESPONSE

3 dB Bandwidth 30 50 30 50 kHz
Slew Rate 0.22 0.22 V/µs

NOISE

0.1 Hz to 10 Hz 10 10 µV p-p
Spectral Density, 1 kHz, RTI 300 300 nV/√Hz

POWER SUPPLY

Operating Range 4.7 12 4.7 12 V
Quiescent Current vs. V

Temperature

PSRR VS = 4.7 V to 12 V 75 80 75 80 dB

TEMPERATURE RANGE

For Specified Performance –40 +125 –40 +150 °C

NOTES

1

Source imbalance < 2 Ω.

2

The AD8200 preamplifier exceeds 80 dB CMRR at 10 kHz. However, since the signal is available only by way of a 100 k Ω resistor, even the small amounts of pin­to-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-to­pin coupling may be neglected in all applications using filter capacitors at Node 3.

Specifications subject to change without notice.

(TA = 25C, VS = 5 V, VCM = 0 V, RL = 10 k.)

AD8200 SOIC AD8200 DIE

≥ 0.1 V dc –1 +1 –1 +1 %

O

= 0.15 V; 125°C (SOIC)

V

CM

+150°C (DIE) –2.5 +2.5 –3.5 +3.5 mV
VCM = 0.15 V; –40°C–2 +2–3 +3mV

1

VCM = 10 V
f = 1 kHz 80 80 dB
f = 10 kHz

O

2

= 0.1 V dc 0.25 1 0.25 1 mA

80 80 dB

REV. B–2–

AD8200

www.BDTIC.com/ADI

ABSOLUTE MAXIMUM RATINGS*

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.5 V

Transient Input Voltage (300 ms) . . . . . . . . . . . . . . . . . . 44 V

Continuous Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . 35 V

Reversed Supply Voltage Protection . . . . . . . . . . . . . . . . 0.3 V

Operating Temperature

DIE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +150°C

SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +125°C

Storage Temperature . . . . . . . . . . . . . . . . . . –65°C to +150°C

Output Short-Circuit Duration . . . . . . . . . . . . . . . . Indefinite

Lead Temperature Range (Soldering 60 sec) . . . . . . . . . 300°C

*Stresses beyond those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; the functional operation of
the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.

ORDERING GUIDE

Model Temperature Range Package Description Package Option

AD8200YR –40°C to +125°C SOIC R-8
AD8200YR-Reel –40°C to +125°C SOIC R-8
AD8200YR-Reel-7 –40°C to +125°C SOIC R-8
AD8200YCHIPS –40°C to +150°CDIE Form
AD8200YCSURF –40°C to +150°CDIE Form

PIN CONFIGURATION

1

–IN

2

GND

TOP VIEW

3

A1

(Not to Scale)

A2

4

NC = NO CONNECT

AD8200

8

+IN

7

NC

6

+V

S

5

OUT

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 the
AD8200 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.

METALLIZATION PHOTOGRAPH

+V

S

6

OUT5

+IN

–IN 1

8

REV. B

2

GND

–3–

3

A1

A24

AD8200–Typical Performance Characteristics

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(TA = 25C, VS = 5 V, VCM = 0 V, RL = 10 k, unless otherwise noted.)

30

25

20

15

10

5

POSITIVE COMMON-MODE RANGE – V

0

253

SUPPLY VOLTAGE – V

+V

CM

–V

CM

4

TPC 1. Input Common-Mode Range vs. Supply

0

–2

–4

–6

–8

–10

NEGATIVE COMMON-MODE RANGE – V

–12

30

25

20

15

10

5

GAIN – dB

0

–5

–10

–15

–20

1k

10k 100k 1M

FREQUENCY – Hz

TPC 4. Gain vs. Frequency

0

–5

–10

–15

–20

–25

OUTPUT VOLTAGE – mV

–30

–35

2

RL = 10k TO GND

RL =

SUPPLY VOLTAGE – V

4

53

TPC 2. Output Voltage – VS vs. Supply

5

4

3

2

OUTPUT VOLTAGE – V

1

0

10

100 1k 10k
LOAD RESISTANCE – 

TPC 3. Output Voltage Swing vs. Load Resistance

100

95

90

85

80

75

CMRR – dB

70

65

60

55

50

10

100 100k

1k 10k 1M

FREQUENCY – Hz

TPC 5. Common-Mode Rejection Ratio vs. Frequency

100

90

80

70

60

50

PSRR – dB

40

30

20

10

0

10

100 10k1k 100k

FREQUENCY – Hz

TPC 6. Power Supply Rejection Ratio vs. Frequency

REV. B–4–