Datasheet LTC6268, LTC6269 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Dual 500MHz Ultra-Low Bias Current FET Input Op Amp |
| Pages / Page | 24 / 1 — FEATURES. DESCRIPTION. Gain Bandwidth Product: 500MHz. –3dB Bandwidth (A … |
| File Format / Size | PDF / 503 Kb |
| Document Language | English |
FEATURES. DESCRIPTION. Gain Bandwidth Product: 500MHz. –3dB Bandwidth (A = 1): 350MHz. Low Input Bias Current:
Model Line for this Datasheet
Text Version of Document
LTC6268/LTC6269 500MHz Ultra-Low Bias Current FET Input Op Amp
FEATURES DESCRIPTION
n
Gain Bandwidth Product: 500MHz
The LTC®6268/LTC6269 is a single/dual 500MHz FET-input n
–3dB Bandwidth (A = 1): 350MHz
operational amplifier with extremely low input bias current n
Low Input Bias Current:
and low input capacitance. It also features low input-
±3fA Typ. Room Temperature
referred current noise and voltage noise making it an ideal
4pA Max at 125°C
choice for high speed transimpedance amplifiers, CCD n
Current Noise (100kHz): 5.5fA/√Hz
output buffers, and high-impedance sensor amplifiers. n
Voltage Noise (1MHz): 4.3nV/√Hz
Its low distortion makes the LTC6268/LTC6269 an ideal n
Extremely Low CIN 450fF
amplifier for driving SAR ADCs. n
Rail-to-Rail Output
It operates on 3.1V to 5.25V supply and consumes 16.5mA n Slew Rate: 400V/µs per amplifier. A shutdown feature can be used to lower n Supply Range: 3.1V to 5.25V power consumption when the amplifier is not in use. n Quiescent Current: 16.5mA n Harmonic Distortion (2V The LTC6268 single op amp is available in 8-lead SOIC and P-P): –100dB at 1MHz 6-lead SOT-23 packages. The SOIC package includes two –80dB at 10MHz unconnected pins which can be used to create an input pin n Operating Temp Range: –40°C to 125°C guard ring to protect against board leakage currents. The n Single in 8-Lead SO-8, 6-Lead TSOT-23 Packages LTC6269 dual op amp is available in 8-lead MSOP with n Dual in 8-Lead MS8, 3mm × 3mm 10-Lead DFN 10 Packages exposed pad and 3mm × 3mm 10-lead DFN packages. They are fully specified over the –40°C to 85°C and the
APPLICATIONS
–40°C to 125°C temperature ranges. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear n Trans-Impedance Amplifiers Technology Corporation. All other trademarks are the property of their respective owners. n ADC Drivers n CCD Output Buffer n Photomultiplier Tube Post-Amplifier n Low IBIAS Circuits
TYPICAL APPLICATION 20kΩ TIA Frequency Response
100
20kΩ Gain 65MHz Trans-Impedance Amplifier
90 PARASITIC 20kΩ* FEEDBACK C 80 2.5V 2.5V 70 PD – GAIN (dBΩ) 60 I V PD LTC6268 OUT = –IPD • 20k BW = 65MHz + 50 –2.5V 40 6268 TA01 0.01 0.1 1 10 100 1000 PD = OSI OPTOELECTRONICS, FCI-125G-006 FREQUENCY (MHz) *TWO 40.2kΩ 0603 PACKAGE RESISTORS IN PARALLEL 6268 TA02 62689f For more information www.linear.com/LTC6268 1
FEATURES DESCRIPTION
n
Gain Bandwidth Product: 500MHz
The LTC®6268/LTC6269 is a single/dual 500MHz FET-input n
–3dB Bandwidth (A = 1): 350MHz
operational amplifier with extremely low input bias current n
Low Input Bias Current:
and low input capacitance. It also features low input-
±3fA Typ. Room Temperature
referred current noise and voltage noise making it an ideal
4pA Max at 125°C
choice for high speed transimpedance amplifiers, CCD n
Current Noise (100kHz): 5.5fA/√Hz
output buffers, and high-impedance sensor amplifiers. n
Voltage Noise (1MHz): 4.3nV/√Hz
Its low distortion makes the LTC6268/LTC6269 an ideal n
Extremely Low CIN 450fF
amplifier for driving SAR ADCs. n
Rail-to-Rail Output
It operates on 3.1V to 5.25V supply and consumes 16.5mA n Slew Rate: 400V/µs per amplifier. A shutdown feature can be used to lower n Supply Range: 3.1V to 5.25V power consumption when the amplifier is not in use. n Quiescent Current: 16.5mA n Harmonic Distortion (2V The LTC6268 single op amp is available in 8-lead SOIC and P-P): –100dB at 1MHz 6-lead SOT-23 packages. The SOIC package includes two –80dB at 10MHz unconnected pins which can be used to create an input pin n Operating Temp Range: –40°C to 125°C guard ring to protect against board leakage currents. The n Single in 8-Lead SO-8, 6-Lead TSOT-23 Packages LTC6269 dual op amp is available in 8-lead MSOP with n Dual in 8-Lead MS8, 3mm × 3mm 10-Lead DFN 10 Packages exposed pad and 3mm × 3mm 10-lead DFN packages. They are fully specified over the –40°C to 85°C and the
APPLICATIONS
–40°C to 125°C temperature ranges. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear n Trans-Impedance Amplifiers Technology Corporation. All other trademarks are the property of their respective owners. n ADC Drivers n CCD Output Buffer n Photomultiplier Tube Post-Amplifier n Low IBIAS Circuits
TYPICAL APPLICATION 20kΩ TIA Frequency Response
100
20kΩ Gain 65MHz Trans-Impedance Amplifier
90 PARASITIC 20kΩ* FEEDBACK C 80 2.5V 2.5V 70 PD – GAIN (dBΩ) 60 I V PD LTC6268 OUT = –IPD • 20k BW = 65MHz + 50 –2.5V 40 6268 TA01 0.01 0.1 1 10 100 1000 PD = OSI OPTOELECTRONICS, FCI-125G-006 FREQUENCY (MHz) *TWO 40.2kΩ 0603 PACKAGE RESISTORS IN PARALLEL 6268 TA02 62689f For more information www.linear.com/LTC6268 1
