LTC6248_15 Datasheet, PDF (1/24 Pages) Linear Technology – 180MHz, 1mA Power Efficient Rail-to-Rail I/O Op Amps

Features
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-Pin TSOT-23}
n _{Dual in MS8, 2mm × 2mm Thin DFN,TS0T-23, MS10}
n _{Quad in MS16}
Applications
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}
LTC6246/LTC6247/LTC6248
180MHz, 1mA Power
Efficient Rail-to-Rail
I/O Op Amps
Description
The LTC^®6246/LTC6247/LTC6248 are single/dual/quad low
power, high speed unity gain stable rail-to-rail input/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.
The LTC6246 family maintains high efficiency performance
from supply voltage levels of 2.5V to 5.25V and is fully
specified at supplies of 2.7V and 5.0V.
For applications that require power-down, the LTC6246
and 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.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Typical Application
Low Noise Low Distortion Gain = 2 ADC Driver
3.3V
V_IN +
LTC6246
–
499Ω
1%
499Ω
1%
10pF
3.3V 2.5V
V_DD V_REF
CS
A_IN
SDO
LTC2366
SCK
GND ^OVDD
624678 TA01a
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
0
350kHz FFT Driving ADC
f_IN = 350.195kHz
f_SAMP = 2.2Msps
SFDR = 82dB
SNR = 70dB
1024 POINT FFT
200 400 600 800 1000
FREQUENCY (kHz)
624678 TA01b
624678fa