AD8202 Datasheet, PDF (1/12 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 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 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.
FUNCTIONAL BLOCK DIAGRAM
+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
COMMON
NC = NO CONNECT
Figure 2. High-Line Current Sensor
BATTERY 14V
POWER
DEVICE
5V
+IN NC +V_S OUT
OUTPUT
4-TERM
SHUNT
AD8202
–IN GND A1 A2
CLAMP
DIODE
INDUCTIVE
LOAD
COMMON
NC = NO CONNECT
Figure 3. Low-Line Current Sensor
Rev. A
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