MAX4236 Datasheet, PDF (12/14 Pages) Maxim Integrated Products – SOT23, Very High Precision, 3V/5V Rail-to-Rail Op Amps

SOT23, Very High Precision, 3V/5V
Rail-To-Rail Op Amps
current, low-noise inputs allow a minimum of capaci-
tance to be used.
Piezoresistive transducers applications require many of
the same qualities. For those applications the
MAX4236/MAX4237 high CMRR, PSRR, and offset sta-
bility are also a good match.
A typical application for a piezoresistive transducer
instrumentation amplifier design using the
MAX4236/MAX4237 is shown in the Typical Application
Circuit.
In general, the MAX4236/MAX4237 are good compo-
nents for any application in which an amplifier with an
almost zero input current is required, including high-
precision, long time-constant integrators and electro-
chemical sensors.
Power Supplies
The MAX4236/MAX4237 can operate from a single
+2.4V to +5.5V power supply, or from ±1.2V to ±2.75V
power supplies. The power supply pin(s) must be
bypassed to ground with a 0.1µF capacitor as close to
the pin as possible.
Layout and Physical Design
A good layout improves performance by decreasing
the amount of parasitic and stray capacitance, induc-
tance and resistance at the amplifier’s inputs, outputs,
and power-supply connections. Since parasitics might
be unavoidable, minimize trace lengths, resistor leads,
and place external components as close to the pins as
possible.
In high impedance, low input current applications, input
lines guarding and shielding, special grounding, and
other physical design and layout techniques, are
mandatory if good results are expected.
The negative effects of crosstalk, EMI and other forms
of interference and noise (thermal, acoustic, etc.) must
be accounted for and prevented beforehand for good
performance in the type of sensitive circuitry in which
the MAX4236/MAX4237 are likely to be used.
PART
MAX4236EUT
MAX4236AEUA
MAX4236BEUA
MAX4236AESA
MAX4236BESA
MAX4237EUT
MAX4237AEUA
MAX4237BEUA
MAX4237AESA
MAX4237BESA
GRADE
—
A
B
A
B
—
A
B
A
B
Selector Guide
MINIMUM
STABLE
GAIN
1
1
1
1
1
5
5
5
5
5
TOP MARK
AAUV
—
—
—
—
AAUW
—
—
—
—
Typical Application Circuit
+V_S
LOAD CELL
V_OUT
MAX4236
-V_S
+V_S
MAX4236
-V_S
Chip Information
TRANSISTOR COUNTS: 224
PROCESS: BiCMOS
12 ______________________________________________________________________________________