AD8202_05 Datasheet, PDF (1/20 Pages) Analog Devices – High Common-Mode Voltage, Single-Supply Difference Amplifier

High Common-Mode Voltage,
Single-Supply Difference Amplifier
AD8202
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 typical gain drift
80 dB CMRR min dc to 10 kHz
APPLICATIONS
Transmission control
Diesel injection control
Engine management
Adaptive suspension control
Vehicle dynamics control
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 (CMV). The input CMV range
extends from −8 V to +28 V at a typical supply voltage of 5 V.
The AD8202 is available in die and packaged form. The MSOP
and SOIC packages are specified over a wide temperature range,
from −40°C to +125°C, making the AD8202 well-suited for use
in many automotive platforms.
Automotive platforms demand precision components for
better system control. The AD8202 provides excellent ac and
dc performance keeping errors to a minimum in the user’s
system. Typical offset and gain drift in the SOIC package are
0.3 μV/°C and 1 ppm/°C, respectively. Typical offset and gain
drift in the MSOP package are 2 μV/°C and 1 ppm/°C, respec-
tively. 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 that can be used for low-pass
filter applications and for establishing gains other than 20.
FUNCTIONAL BLOCK DIAGRAMS
+IN 8
–IN 1
200kΩ
NC
A1 A2
7
3
4
100kΩ
G = ×10
+IN
A1
–IN
200kΩ
+V_S
6
AD8202
G = ×2
+IN
A2
–IN
10kΩ
5 OUT
10kΩ
NC = NO CONNECT
2
GND
Figure 1. SOIC (R) Package Die Form
BATTERY
CLAMP
DIODE
14V
4-TERM
SHUNT
INDUCTIVE
LOAD
5V
+IN NC +V_S OUT
AD8202
OUTPUT
POWER
DEVICE
–IN GND A1 A2
BATTERY
COMMON
NC = NO CONNECT
Figure 2. High Line Current Sensor
POWER
DEVICE
5V
OUTPUT
+IN NC +V_S OUT
14V
4-TERM
SHUNT
AD8202
–IN GND A1 A2
CLAMP
DIODE
INDUCTIVE
LOAD
COMMON
NC = NO CONNECT
Figure 3. Low Line Current Sensor
Rev. D
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