AD8219BRMZ Datasheet, PDF (1/12 Pages) Analog Devices – Zero Drift, Unidirectional Current Shunt Monitor

FEATURES
High common-mode voltage range
4 V to 80 V operating
−0.3 V to +85 V survival
Buffered output voltage
Gain = 60 V/V
Wide operating temperature range: −40°C to +125°C
Excellent ac and dc performance
±100 nV/°C typical offset drift
±50 µV typical offset
±5 ppm/°C typical gain drift
110 dB typical CMRR at dc
APPLICATIONS
High-side current sensing
48 V telecom
Power management
Base stations
Unidirectional motor control
Precision high voltage current sources
GENERAL DESCRIPTION
The AD8219 is a high voltage, high resolution, current shunt
amplifier. It features a set gain of 60 V/V, with a maximum
±0.3% gain error over the entire temperature range. The
buffered output voltage directly interfaces with any typical
converter. The AD8219 offers excellent input common-mode
rejection from 4 V to 80 V. The AD8219 performs unidirectional
current measurements across a shunt resistor in a variety of
industrial and telecom applications including motor control,
power management, and base station power amplifier bias
control.
Zero Drift, Unidirectional
Current Shunt Monitor
AD8219
FUNCTIONAL BLOCK DIAGRAM
V_S
R4
LDO
R1
–IN
OUT
+IN
R2
R3
AD8219
GND
Figure 1.
The AD8219 offers breakthrough performance throughout
the −40°C to +125°C temperature range. It features a zero
drift core, which leads to a typical offset drift of ±100 nV/°C
throughout the operating temperature and common-mode
voltage range. Special attention is devoted to output linearity
being maintained throughout the input differential voltage range,
regardless of the common-mode voltage present, while the
typical input offset voltage is ±50 μV.
The AD8219 is offered in a 8-lead MSOP package.
Rev. A
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