ad8200r Analog Devices, Inc., ad8200r Datasheet

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ad8200r

Manufacturer Part Number
ad8200r
Description
High Common-mode Voltage, Single Supply Difference Amplifier
Manufacturer
Analog Devices, Inc.
Datasheet
a
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.
BATTERY
14V
CLAMP
DIODE
COMMON
POWER
DEVICE
4 TERM
SHUNT
INDUCTIVE
LOAD
+IN NC +V
–IN GND A1
AD8200
5V
NC = NO CONNECT
S
High Common-Mode Voltage, Single Supply
OUT
A2
OUTPUT
+IN
–IN
Automotive platforms demand precision components for better
system control. The AD8200 provides excellent ac and dc per-
formance 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 mini-
mum 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.
BATTERY
200k
NC = NO CONNECT
COMMON
14V
FUNCTIONAL BLOCK DIAGRAM
CLAMP
DIODE
200k
NC
+IN
–IN
G = X10
A1
4 TERM
SOIC (R) Package
SHUNT
Difference Amplifier
100k
DIE Form
A1
POWER
DEVICE
INDUCTIVE
LOAD
A2
+IN NC +V
–IN GND A1
AD8200
+IN
–IN
G = X2
A2
+V
5V
NC = NO CONNECT
AD8200
S
S
OUT
A2
10k
10k
AD8200
GND
OUTPUT
OUT

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ad8200r Summary of contents

Page 1

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 – + typical ...

Page 2

AD8200–SPECIFICATIONS SINGLE SUPPLY ( Parameter Condition SYSTEM GAIN Initial Error V vs. Temperature OFFSET VOLTAGE Offset Voltage (RTI) V vs. Temperature INPUT Input Impedance Differential Common-Mode CMV Continuous 1 Common-Mode ...

Page 3

... Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Model AD8200R AD8200CHIPS 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 ...

Page 4

AD8200–Typical Performance Characteristics – SUPPLY VOLTAGE – Volts 0 – –10 –15 –20 – 10k TO GND L –30 – ...

Page 5

TEK RUN: 2.5MS/s HI RES 10k OUT CH1 500mV CH2 50mV CH1 THEORY OF OPERATION The AD8200 consists of a preamp and buffer arranged as shown in ...

Page 6

AD8200 CURRENT SENSING High-Line, High-Current Sensing Basic automotive applications making use of the large common- mode range are shown in Figures 1 and 2. The capability of the device to operate as an amplifier in primary battery supply cir- cuits ...

Page 7

Internal Signal Overload Considerations When configuring gain for values other than 20, the maximum input voltage with respect to the supply voltage and ground must be considered, since either the preamplifier or the output buffer will reach its full-scale output ...

Page 8

AD8200 HIGH LINE CURRENT SENSING WITH LPF AND GAIN ADJUSTMENT Figure 11 is another refinement of Figure 1, including gain adjustment and low-pass filtering. INDUCTIVE LOAD CLAMP DIODE + BATTERY 14V 4 TERM AD8200 SHUNT –IN GND A1 ...

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