LTC6257_15 Datasheet, PDF (1/24 Pages) Linear Technology – 6.5MHz, 65A Power Efficient Rail-to-Rail I/O Op Amps

Features
n _{Gain Bandwidth Product: 6.5MHz}
n _{–3dB Bandwidth (AV = +1): 4.5MHz}
n _{Low Quiescent Current: 65µA}
n _{Stable for Capacitive Load Up to 100nF}
n _{Offset Voltage: 350µV Maximum}
n _{Rail-to-Rail Input and Output}
n _{Supply Voltage Range: 1.8V to 5.25V}
n _{Input Bias Current: 50nA Maximum}
n _{CMRR/PSRR: 100dB/100dB}
n _{Shutdown Current: 7µA Maximum}
n _{Operating Temperature Range: –40°C to 125°C}
n _{Single in 6-Lead TSOT-23 Package}
n _{Dual in 8-Lead MS8, MS10, TS0T-23, 2mm × 2mm}
Thin DFN Packages
n _{Quad in MS16 Package}
Applications
n _{Micropower Active Filters}
n _{Portable Instrumentation}
n _{Battery or Solar Powered Systems}
n _{Automotive Electronics}
LTC6255/LTC6256/LTC6257
6.5MHz, 65µA Power
Efficient Rail-to-Rail I/O
Op Amps
Description
The LTC^®6255/LTC6256/LTC6257 are single/dual/quad
operational amplifiers with low noise, low power, low
supply voltage, and rail-to-rail inputs and outputs. They
are unity gain stable with capacitive load up to 100nF.
They feature 6.5MHz gain-bandwidth product, 1.8V/µs
slew rate while consuming only 65µA of supply current
per amplifier operating on supply voltages ranging from
1.8V to 5.25V. The combination of low supply current,
low supply voltage, high gain bandwidth product and low
noise makes the LTC6255 family unique among rail-to-rail
input/output op amps with similar supply current. These
operational amplifiers are ideal for low power and low
noise applications.
For applications that require power-down, the LTC6255
and LTC6256 in S6 and MS10 packages offer shutdown
which reduces the current consumption to 7µA maximum.
The LTC6255 family can be used as plug-in replacements
for many commercially available op amps to reduce power
and improve input/output range and performance.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
Over-The-Top is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Typical Application
Low Power, Low Distortion ADC Driver
V_IN
5mV TO 2V
10k
1%
3.3V
+
LTC6255
–
324Ω
1%
470pF
NPO
6.34k, 1%
3.3V
V_DD
V_{REF CS}
SDO
A_IN LTC2361 _SCK
GND ^OVDD
625567 TA01a
22pF I_SUPPLY = 540µA TOTAL AT 125kSps
LTC6255 Driving LTC2361 ADC
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
0
V_IN = –1dBFS, 5kHz
f_S = 125kSps
SNR = 72.5dB
SFDR = 89dB
t_ACQ = 5µs
t_CONV = 3µs
10 20 30 40 50 60
FREQUENCY (kHz)
625567 TA01b
625567fb
1