LTC6269-10_15 Datasheet, PDF (1/22 Pages) Linear Technology – 4GHz Ultra-Low Bias Current FET Input Op Amp

LTC6268-10/LTC6269-10
4GHz Ultra-Low Bias
Current FET Input Op Amp
FEATURES
nn _{Gain Bandwidth Product: 4GHz}
nn _{Low Input Bias Current:}
nn _{±3fA Typ. Room Temperature}
nn _{4pA Max at 125°C}
nn _{Current Noise (100kHz): 7fA/√Hz}
nn _{Voltage Noise (1MHz): 4.0nV/√Hz}
nn _{Extremely Low CIN 0.45pF}
nn _{Rail-to-Rail Output}
nn _{AV ≥10}
nn _{Slew Rate: +1500V/µs, –1000V/µs}
nn _{Supply Range: 3.1V to 5.25V}
nn _{Quiescent Current: 16.5mA}
nn _{Operating Temp Range: –40°C to 125°C}
nn _{Single in 8-Lead SO-8, 6-Lead TSOT-23 Packages}
nn _{Dual in 8-Lead MS8, 3mm × 3mm 10-Lead}
DFN 10 Packages
APPLICATIONS
nn _{Transimpedance Amplifiers}
nn _{ADC Drivers}
nn _{Photomultiplier Tube Post-Amplifier}
nn _{Low IBIAS Circuits}
DESCRIPTION
The LTC^®6268-10/LTC6269-10 is a single/dual 4GHz FET-
input operational amplifier with extremely low input bias
current and low input capacitance. It also features low
input-referred current noise and voltage noise making it an
ideal choice for high speed transimpedance amplifiers, and
high-impedance sensor amplifiers. It is a decompensated
op amp that is gain-of-10 stable.
It operates on 3.1V to 5.25V supply and consumes 16.5mA
per amplifier. A shutdown feature can be used to lower
power consumption when the amplifier is not in use.
The LTC6268-10 single op amp is available in 8-lead SOIC
and 6-lead SOT-23 packages. The SOIC package includes
two unconnected pins which can be used to create an input
pin guard ring to protect against board leakage currents.
The LTC6269-10 dual op amp is available in 8-lead MSOP
with exposed pad and 3mm × 3mm 10-lead DFN packages.
They are fully specified over the –40°C to 85°C and the
–40°C to 125°C temperature ranges.
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
20kΩ Gain 210MHz Transimpedance Amplifier
2.5V
PD
I_PD
20kΩ
2.5V
–
LTC6268-10
+
PARASITIC
FEEDBACK C
V_OUT = –I_PD • 20k
BW = 210MHz
–2.5V
626810 TA01
PD = OSI OPTOELECTRONICS, FCI-125G-006
20kΩ TIA Frequency Response
90
87
84
81
78
75
72
69
66
63
60
10k
100k
1M 10M
FREQUENCY (Hz)
100M 1G
626810 TA01b
For more information www.linear.com/LTC6268-10
626810f
1