MAX44264 Maxim, MAX44264 Datasheet - Page 8

• Manufacturer Part Number: MAX44264
• Description: The MAX44264 is an ultra-small (6-bump WLP) op amp that draws only 750nA of supply current
• Manufacturer: Maxim

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.
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
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.
The IC is internally compensated for unity-gain stability
and has a typical gain-bandwidth of 9kHz.
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
Ultra-Low Power Op Amp in
a Tiny 6-Bump WLP
8
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PIN
A1
A2
B1
B2
C1
C2
Applications Information
Power Supplies and Layout
NAME
OUT
N.C.
V
IN+
V
IN-
DD
SS
DD
pin.
Ground Sensing
Noninverting Amplifier Input
Negative Power-Supply Voltage
Inverting Amplifier Input
Positive Power-Supply Voltage
Amplifier Output
No Connection. Not internally connected.
Bandwidth
TOP VIEW
Stability
OUT
IN+
IN-
+
SIDE DOWN
WLP BUMP
MAX44264
C1
A1
B1
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.
C2
A2
B2
Figure 1. Compensation for Feedback Node Capacitance
PROCESS: BiCMOS
N.C.
V
V
DD
SS
FUNCTION
R2
V
IN
MAX44264
V
V
CC
Pin Configuration
SS
Chip Information
2pF TO 10pF
Pin Description
R1