Datasheet

common mode. The ratio of these voltages is called the
common-mode gain. The common-mode rejection ratio
is the ratio of differential-mode gain to common-mode
gain. The high CMRR properties of the
MAX4465–MAX4469 provide outstanding performances
when configured as a noninverting microphone pream-
plifier.
Power-Up
The MAX4465–MAX4469 outputs typically settle within
1µs after power-up. Figure 6 shows the output voltage
on power-up.
Power Supplies and Layout
The MAX4465–MAX4469 operate from a single +2.4V to
+5.5V power supply. Bypass the power supply with a
0.1µF capacitor to ground. Good layout techniques are
necessary for the MAX4465–MAX4469 family. To
decrease stray capacitance, minimize trace lengths by
placing external components close to the op amp’s
pins. Surface-mount components are recommended. In
systems where analog and digital grounds are avail-
able, the MAX4465–MAX4469 should be connected to
the analog ground.
Test Circuits/Timing Diagrams
Figure 2. MAX4466 Typical Application Circuit
ELECTRET
CAPSULE
V
CC
= +5V
MAX4466
2k
Ω
10k
Ω
GND
100kΩ
100pF
1M
Ω
+5V
+5V
1M
Ω
2k
Ω
0.1
µ
F
0.01
µ
F
1
µ
F
1
5
2
4
3
IN+
IN-
OUT
MAX4465–MAX4469
Low-Cost, Micropower, SC70/SOT23-8, Microphone
Preamplifiers with Complete Shutdown
8 _______________________________________________________________________________________
1V/div
100µs/div
Figure 1. Rail-to-Rail Output Operation