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