Features at 2.7V

• 136

µA supply current per amplifier

• 4.9MHz bandwidth

• Output swings to within 20mV of either rail

• Input voltage range exceeds the rail by >250mV

• 5.3V/

µs slew rate

• 16mA output current

• 21nV/

√Hz input voltage noise

• KM4170:

directly replaces OPA340, OPA343, and TLV2461 in

single supply applications and available in SC70-5 and

SOT23-5 package options

• KM4270:

directly replaces MAX4126, OPA2340, LMV822 and

TLV2462 in single supply applications and available in

SOIC-8 and MSOP-8 package options

• KM4470:

directly replaces MAX4129, OPA4340, LMV824 and

TLV2464 in single supply applications and available in

TSSOP-14 package option

Applications

• Portable/battery-powered applications

• PCMCIA, USB

• Mobile communications, cellular phones, pagers

•Notebooks and PDA’s

• Sensor Interface

• A/D buffer

• Active filters

• Signal conditioning

• Portable test instruments

Description

The KM4170 (single), KM4270 (dual), and KM4470 (quad)

are ultra-low cost, low power, voltage feedback amplifiers.

At 5V, the KM4X70 family uses only 160

µA of supply current

per amplifier and are designed to operate from a supply range

of 2.5V to 5.5V (±1.25 to ±2.75). The input voltage range

exceeds the negative and positive rails.

The KM4X70 family of amplifiers offer high bipolar

performance at a low CMOS prices. They offer superior

dynamic performance with 4.9MHz small signal bandwidths

and 5.3V/

µs slew rates. The combination of low power, high

bandwidth, and rail-to-rail performance make the KM4X70

amplifiers well suited for battery-powered communication/

computing systems.

KM4170, KM4270, KM4470

Low Cost, +2.7V & +5V, Rail-to-Rail I/O Amplifiers

www.fairchildsemi.com

REV. 5 December 2002

Large Signal Frequency Response

Frequency (MHz)

0.01

0.1

1

10

Output Swing vs. Load

Input Voltage (0.4V/div)

-2.0

0

2.0

-1.35

0

1.35