LTC6253_15 Datasheet, PDF (1/26 Pages) Linear Technology – 720MHz, 3.5mA Power Efficient Rail-to-Rail I/O Op Amps

LTC6252/LTC6253/LTC6254
FEATURES
n _{Gain Bandwidth Product: 720MHz}
n _{–3dB Frequency (AV = 1): 400MHz}
n _{Low Quiescent Current: 3.5mA Max}
n _{High Slew Rate: 280V/µs}
n _{Input Common Mode Range Includes Both Rails}
n _{Output Swings Rail-to-Rail}
n _{Low Broadband Voltage Noise: 2.75nV/√Hz}
n _{Power-Down Mode: 42μA}
n _{Fast Output Recovery}
n _{Supply Voltage Range: 2.5V to 5.25V}
n _{Input Offset Voltage: 350µV Max}
n _{Large Output Current: 90mA}
n _{CMRR: 105dB}
n _{Open Loop Gain: 60V/mV}
n _{Operating Temperature Range: –40°C to 125°C}
n _{Single in 6-Pin TSOT-23}
n _{Dual in MS8, 2mm × 2mm DFN, 8-Pin 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 _{Battery Powered Equipment}
720MHz, 3.5mA Power
Efficient Rail-to-Rail
I/O Op Amps
DESCRIPTION
The LTC^®6252/LTC6253/LTC6254 are single/dual/quad low
power, high speed unity gain stable rail-to-rail input/output
operational amplifiers. On only 3.5mA of supply current
they feature a 720MHz gain-bandwidth product, 280V/µs
slew rate and a low 2.75nV/√Hz of input-referred noise.
The combination of high bandwidth, high slew rate, low
power consumption and low broadband noise makes the
LTC6252 family 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 LTC6252 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 LTC6252 and
the LTC6253 in MS10 offer a shutdown pin which disables
the amplifier and reduces current consumption to 42µA.
The LTC6252 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
5V Single-Supply 16-Bit ADC Driver
V_IN
27.4mV TO
(3.5V + 27.4mV)
5V
+
½ LTC6253
–
143Ω
845Ω
5V
5V
10µF
0.1µF
10µF
0.1µF
1.8V TO 5V
4.7µF
2.5k 2.5k
5V
–
½ LTC6253
+
~2.08V
249Ω 100Ω
3900pF
249Ω 100Ω
AVP
IN⁺
DVP
OVP _PARALLEL
OR
SERIAL
16 BIT
INTERFACE
LTC2393-16
SER/PAR
BYTESWAP
IN^–
OB/2C
CS
REFIN
CNVST RESET
RD
VCM REFOUT
PD GND OGND
BUSY
625234 TA01
10µF
1µF
SAMPLE CLOCK
LTC6253 Driving LTC2393-16
16-Bit ADC 5V Single-Supply
Performance
0
–20
–40
–60
–80
–100
–120
f_S = 1Msps
F1 = 20.111kHz
F1 AMPLITUDE
= –1.032dBFS
SNR = 93.28dB
THD = –100.50dB
SINAD = 92.53dB
SFDR = 104.7dB
F2 = –106.39dBc
F3 = –104.70dBc
F4 = –114.13dBc
F5 = –105.48dBc
–140
–160
0
100 200 300 400 500
FREQUENCY (kHz)
624678 TA01b
625234fc
1