Pr

eliminary

Preliminary

February 2001

KM4270

Dual, Low Cost, +2.7V and +5V,

Rail-to-Rail I/O Amplifier

Product Brief

Features at 2.7V

I

160

µA supply current per amplifier

I

4.9MHz bandwidth

I

Output swings to within 20mV of either rail

I

Input voltage range exceeds the rail by >250mV

I

5.3V/

µs slew rate

I

35mA short circuit output current

I

24nV/

√Hz input voltage noise

I

Directly replaces MAX4126, OPA2340, LMV822,

and TLV2462 in single supply applications

I

Available in SOIC and MSOP package options

Applications

I

Portable/battery-powered applications

I

PCMCIA, USB

I

Mobile communications, cellular phones, pagers

I

Notebooks and PDA’s

I

Sensor Interface

I

A/D buffer

I

Active filters

I

Signal conditioning

I

Portable test instruments

General Description

The KM4270 is a dual ultra-low cost, low power,

voltage feedback amplifier. At 5V, the KM4270 uses

only 160

µA of supply current per amplifier and is

designed to operate from a supply range of 2.5V to

5.5V. The input voltage range exceeds the negative

and positive rails. The KM4170 (single) and KM4470

(quad) are also available.

The KM4270 offers high bipolar performance at a low

CMOS price. The KM4270 offers superior dynamic

performance with a 4.9MHz small signal bandwidth

and 5.3V/

µs slew rate. The combination of low power,

high bandwidth, and rail-to-rail performance make

the KM4270 well suited for battery-powered com-

munication/computing systems.

© 2001 Fairchild Semiconductor

Corporation

www.fairchildsemi.com

Patents Pending

Outperforms the competition in

single-supply applications at a

lower cost!

Advertised 5V

KM4270

Competitors

Units

Specifications

A

B

C

D

G = 1 BW

4.3

5

5.5

5.6

6.4

MHz

Noise

27

22

25

24

11

nV/

√Hz

Slew rate

9

2

6.0

2

1.6

V/

µs

Supply current

160

850

750

250

550

µA

Available Packages

Ordering Information

Part No.

Package

Container

Pack Qty

Eval Bd*

KM4270IC8

SOIC-8

Rail

95

KEB006

KM4270IC8TR3

SOIC-8

Reel

2500

KEB006

KM4270IM8

MSOP-8

Rail

50

KEB010

KM4270IM8TR3

MSOP-8

Reel

4000

KEB010

Temperature range for all parts: -40°C to +85°C.

* Evaluation boards are available to aid in the evaluation of these products. See the full

data sheet or website for complete information.

-

+

-

+

1

2

3

4

Out1

-In1

+In1

Out2

-In2

+In2

8

7

6

5

SOIC

-

+

-

+

1

2

3

4

Out1

-In1

+In1

Out2

-In2

+In2

8

7

6

5

MSOP

MSOP-8

(not actual size)

SOIC-8

(not actual size)