MAX44264
Ultra-Low Power Op Amp in
a Tiny 6-Bump WLP
8 _______________________________________________________________________________________
Applications Information
Ground Sensing
The common-mode input range of the MAX44264
extends down to ground, and offers excellent common-
mode rejection. These devices are guaranteed not to
undergo phase reversal when the input is overdriven.
Power Supplies and Layout
The IC operates from a single +1.8V to +5.5V power
supply. Bypass power supplies with a 0.1µF ceramic
capacitor placed close to the V
DD
pin.
Ground layout improves performance by decreasing the
amount of stray capacitance and noise at the op amp’s
inputs and outputs. To decrease stray capacitance, mini-
mize PCB lengths and resistor leads, and place external
components close to the op amps’ pins.
Bandwidth
The IC is internally compensated for unity-gain stability
and has a typical gain-bandwidth of 9kHz.
Stability
The IC maintains stability in their minimum gain configu-
ration while driving capacitive loads. Although this prod-
uct family is primarily designed for low-frequency
applications, good layout is extremely important
because low-power requirements demand high-imped-
ance circuits. The layout should also minimize stray
capacitance at the amplifier inputs. However some stray
capacitance may be unavoidable, and it may be neces-
sary to add a 2pF to 10pF capacitor across the feedback
resistor as shown in Figure 1. Select the smallest capaci-
tor value that ensures stability.
Pin Description
N.C.
