MAX4468EKA-T Maxim Integrated, MAX4468EKA-T Datasheet - Page 8

• Manufacturer Part Number: MAX4468EKA-T
• Description: Microphone Preamplifiers
• Manufacturer: Maxim Integrated

Specifications of MAX4468EKA-T

• Common Mode Rejection Ratio (min): 80 dB
• Input Offset Voltage: 5 m V at 5 V
• Maximum Operating Temperature: + 85 C
• Package / Case: SOT-23
• Maximum Power Dissipation: 421 mW
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3 V, 5 V
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 2.4 V

Low-Cost, Micropower, SC70/SOT23-8, Microphone
Preamplifiers with Complete Shutdown
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.
MAX4465–MAX4469 provide outstanding performances
when configured as a noninverting microphone pream-
plifier.
The MAX4465–MAX4469 outputs typically settle within
1µs after power-up. Figure 6 shows the output voltage
on power-up.
8
Figure 2. MAX4466 Typical Application Circuit
The
high
ELECTRET
CAPSULE
CMRR
Figure 1. Rail-to-Rail Output Operation
properties
2kΩ
2kΩ
+5V
Power-Up
of
0.1µF
0.01µF
the
100µs/div
+5V
10kΩ
1µF
1MΩ
1MΩ
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.
IN+
IN-
Test Circuits/Timing Diagrams
1
3
1V/div
MAX4466
V
100kΩ
CC
Power Supplies and Layout
100pF
2
= +5V
5
GND
4
OUT