Fairchild KM4100 KM4101 Data Sheet
Summary
Discover the KM4100/KM4101 line of low-cost, high-performance rail-to-rail signal amplifiers, optimized for operation at +2.7V and +5V supplies. These advanced amplifiers deliver superior dynamic performance, including a 260MHz bandwidth and high output drive ($\pm90\text{mA}$), making them ideal for battery-powered and portable applications. This comprehensive manual provides detailed electrical characteristics, operational guidelines, and application circuits for engineers developing consumer electronics, scanners, wireless phones, and industrial systems requiring reliable signal conditioning.
Page 1 Text Content
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KM4100/KM4101 Low Cost, +2.7V and +5V, 260MHz Rail-to-Rail Amplifiers Features General Description
260MHz bandwidth The KM4100 (single) and KM4101 (single with Fully specified at +2.7V and +5V supplies disable) are low cost, voltage feedback amplifiers. These amplifiers are designed to operate on +2.7V,
Output voltage range:
+5V, or ±2.5V supplies. The input voltage range
0.036V to 4.953V; Vs = +5; RL = 2kΩ
extends 300m V below the negative rail and 1.2V
Input voltage range: -0.3V to +3.8V; Vs = +5
below the positive rail.
150V/µs slew rate 4.2m A supply current The KM4100 offers superior dynamic performance Power down to Is = 127µA (KM4101) with a 260MHz small signal bandwidth and 150V/µs ±60m A linear output current slew rate. The combination of low power, high
±90m A output short circuit current output current drive, and rail-to-rail performance Directly replaces AD8051 and LM7131 in single make the KM4100 well suited for battery-powered communication/computing systems.
supply applications Small package options (SOT-23, SOIC)
The combination of low cost and high performance
ut pu t V ol ta ge 0. make the KM4100 suitable for high volume applications 5V /d iv
Applications
in both consumer and industrial applications such as
A/D driver wireless phones, scanners, and color copiers. Active filters CCD imaging systems
Output Swing
CD/DVD ROM
Coaxial cable drivers High capacitive load driver Portable/battery-powered applications Twisted pair driver Video driver
KM4100/KM4101 Packages
Vs = +2.7V
SOT23-5 (KM4100) SOT23-6 (KM4101)
RL = 2kΩ G = -1
Out +Vs Out +Vs
Time (0.5µs/div)
-Vs -Vs DIS
+In -In +In -In
SOIC (KM4100) SOIC (KM4101)
NC NC NC DIS
-In +Vs -In +Vs
+In Out +In Out
-Vs NC -Vs NC
REV. 1A February 2001
Page Summary Contents For Fairchild KM4100 KM4101 Data Sheet
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 11 |
| File Size | 333.92 KB |
| Published | June 02, 2026 |
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Frequently Asked Questions
What is the maximum small signal bandwidth for the KM4100?
The bandwidth is 260 MHz when using the standard configuration.
Can this amplifier be used in battery-powered devices?
Yes, its combination of low power consumption and rail-to-rail performance makes it suitable for portable/battery-powered applications.
What specific legacy amplifiers does the KM4100 directly replace?
It directly replaces AD8051 and LM7131 in single communication/computing systems.
How much power is consumed by the KM4101 when disabled (power down)?
The KM4101 can power down to a current of 127µA.