MAX44265 View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX44265

Rail-to-Rail, 200kHz Op Amp with Shutdown in a Tiny, 6-Bump WLP

Maxim Integrated 

Rail-to-Rail, 200kHz Op Amp

with Shutdown in a Tiny, 6-Bump WLP

Power-Supply Considerations

The IC is optimized for single 1.8V to 5.5V supply oper-

ation. A high amplifier power-supply rejection ratio of

95dB (typ) allows the devices to be powered directly

from a battery, simplifying design and extending bat-

tery life.

Power-Up Settling Time

The IC typically requires 5µs after power-up. Supply

settling time depends on the supply voltage, the value

of the bypass capacitor, the output impedance of the

incoming supply, and any lead resistance or induc-

tance between components. Op-amp settling time

depends primarily on the output voltage and is slew-

rate limited. Figure 3 shows MAX44265 in a noninvert-

ing voltage follower configuration with the input held at

midsupply. The output settles in approximately 18µs for

VDD = 3V (see the Typical Operating Characteristics for

power-up settling time).

Shutdown Mode

The IC features an active-low shutdown input. The

device enters shutdown in 2µs (typ) and exit in 30µs

(typ). The amplifier’s outputs are in a high-impedance

state in shutdown mode. Drive SHDN low to enter shut-

down. Drive SHDN high to enable the amplifier.

5.5V

0V

IN-

VDD

100kΩ

MAX44265

OUT

IN+

VSS

100kΩ

Figure 3. Power-Up Test Configuration

Power-Supply Bypassing and Layout

To minimize noise, bypass VDD with a 0.1µF capacitor

to ground, as close to the pin as possible.

Good layout techniques optimize performance

by decreasing the amount of stray capacitance and

inductance to the op amps’ inputs and outputs.

Minimize stray capacitance and inductance by placing

external components close to the IC.

PROCESS: BiCMOS

Chip Information

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