MAX9922AUB+ Maxim Integrated, MAX9922AUB+ Datasheet - Page 12

• Manufacturer Part Number: MAX9922AUB+
• Description: Current Sense Amplifiers Current-Sense Amplifier
• Manufacturer: Maxim Integrated
• Series: MAX9922, MAX9923r

Specifications of MAX9922AUB+

• Rohs: yes

A noise reduction capacitance of ~1nF can be con-
nected between OUT and FB, if needed. Noise reduc-
tion is achieved by both limiting the amplifier
bandwidth, reducing contribution of broadband white
noise and by attenuating contribution of any small
20kHz autozero ripple that appears at the output. Using
higher values of feedback capacitance reduces the
output noise of the amplifier, but also reduces its signal
bandwidth.
At high current levels, the I
significant. Take this into consideration when choosing
the resistor value and its power dissipation (wattage)
rating. The sense resistor’s value will drift if it is allowed
to heat up excessively. The precision V
MAX9922/MAX9923 allows the use of small sense resis-
tors to reduce power dissipation and reduce hot spots.
Ultra-Precision, High-Side
Current-Sense Amplifiers
12
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Optional Noise Reduction Capacitor
Efficiency and Power Dissipation
2
R losses in R
SENSE
OS
can be
of the
Take care to prevent solder and trace resistance from
causing errors in the sensed voltage because of the high
currents that flow through R
nal current-sense resistor or use Kelvin (force and sense)
PCB layout techniques to minimize these errors.
Sense Resistor Connections
SENSE
. Either use a four termi-