MAX4209HAUA+T

The MAX4208/MAX4209 ultra-low offset and drift instrumentation amplifiers feature exceptional precision specifications,
low power consumption, rail-to-rail output, excellent gainbandwidth product, and buffered REFIN/MODE input in a
very small μMAX® package. These devices use a spreadspectrum, autozeroing technique that constantly measures
and corrects the input offset, eliminating drift over time
and temperature and the effect of 1/f noise. This technique
achieves less than 20μV offset voltage, allows ground-sensing capability, provides ultra-low CMOS input bias current
and increased common-mode rejection performance.
The MAX4208/MAX4209 provide high-impedance inputs
optimized for small-signal differential voltages (±100mV).
All devices provide a gain-bandwidth product of 750kHz.
The MAX4208 provides an adjustable gain with two external resistors or unity gain with FB connected to OUT. The
MAX4209 is available with a fixed gain of 100V/V with
±0.03% (typ) accuracy. Both devices include a reference
input (REF) to level-shift the output, allowing for bipolar signals in single-supply applications. In both devices, REFIN/
MODE is an input to a precision unity-gain buffer, which
sets the REF voltage to level-shift the output. The internal
REF buffer allows the reference to be set by a simple resistive divider or an ADC reference without any loading error.
The MAX4208/MAX4209 operate with a 2.85V to 5.5V
single-supply voltage and consume only 750μA of quiescent current (when the internal buffer is off) and only
1.4μA in shutdown mode. These amplifiers also operate
with ±2.5V dual supplies with REF connected to ground
and REFIN/MODE to VSS. The MAX4208/MAX4209 are
available in space-saving 8-pin μMAX packages and
are specified over the automotive operating temperature
range (-40°C to +125°C).