LTC6246/LTC6247/LTC6248

1

Rev C

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TYPICAL APPLICATION

DESCRIPTION

180MHz, 1mA Power

Efficient Rail-to-Rail

I/O Op Amps

TheLTC®6246/LTC6247/LTC6248aresingle/dual/quadlow

power,highspeedunitygainstablerail-to-railinput/output

operational amplifiers. On only 1mA of supply current they

feature an impressive 180MHz gain-bandwidth product,

90V/µs slew rate and a low 4.2nV/√Hz of input-referred

noise. The combination of high bandwidth, high slew rate,

low power consumption and low broadband noise makes

these amplifiers unique among rail-to-rail input/output op

amps with similar supply currents. They are ideal for lower

supply voltage high speed signal conditioning systems.

TheLTC6246familymaintainshighefficiencyperformance

from supply voltage levels of 2.5V to 5.25V and is fully

specified at supplies of 2.7V and 5.0V.

Forapplicationsthatrequirepower-down,theLTC6246and

the LTC6247 in MS10 offer a shutdown pin which disables

the amplifier and reduces current consumption to 42µA.

The LTC6246 family can be used as a plug-in replacement

for many commercially available op amps to reduce power

or to improve input/output range and performance.

FEATURES

APPLICATIONS

n

Gain Bandwidth Product: 180MHz

n

–3dB Frequency (AV = 1): 120MHz

n

Low Quiescent Current: 1mA Max

n

High Slew Rate: 90V/µs

n

Input Common Mode Range Includes Both Rails

n

Output Swings Rail-to-Rail

n

Low Broadband Voltage Noise: 4.2nV/√Hz

n

Power-Down Mode: 42μA

n

Fast Output Recovery

n

Supply Voltage Range: 2.5V to 5.25V

n

Input Offset Voltage: 0.5mV Max

n

Input Bias Current: 100nA

n

Large Output Current: 50mA

n

CMRR: 110dB

n

Open Loop Gain: 45V/mV

n

Operating Temperature Range: –40°C to 125°C

n

Single in 6-Lead TSOT-23

n

Dual in MS8, 2mm × 2mm DFN,TS0T-23, MS10

n

Quad in MS16

n

Low Voltage, High Frequency Signal Processing

n

Driving A/D Converters

n

Rail-to-Rail Buffer Amplifiers

n

Active Filters

n

Video Amplifiers

n

Fast Current Sensing Amplifiers

n

Battery Powered Equipment

Low Noise Low Distortion Gain = 2 ADC Driver

350kHz FFT Driving ADC

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FREQUENCY (kHz)

0

0

–10

–30

–50

–70

–20

–40

–60

–80

–90

–100

–110

400

800

200

600

624678 TA01b

1000

fIN = 350.195kHz

fSAMP = 2.2Msps

SFDR = 82dB

SNR = 70dB

1024 POINT FFT

LTC6246

+

–

624678 TA01a

LTC2366

VREF

GND

VDD

3.3V 2.5V

CS

SDO

SCK

OVDD

3.3V

VIN

AIN

499

1%

499

1%

10pF