描述 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 160μA 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.

Features at 2.7V

? 136μA 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