85737 Ismaning, de
+49 (7131) 9234-0
Tiny 50MHz CMOS Op Amp Boasts Low Noise and High Precision
Using a unique architecture, the LTC6244 boasts low noise of 8nV/√Hz while maintaining an input capacitance of only 2.1 pF. Very low input capacitance is critical at high frequencies to maintain high input impedance and low noise performance.
“This breakthrough performance, previously unattainable from a CMOS amplifier, delivers maximum signal resolution in a variety of applications such as large or small area photodiode, transimpedance and charge coupled amplifiers, precision integrators and filters,” says design manager, Dan Tran. The LTC6244 has applications in instrumentation, medical, industrial and communications systems.
In addition to minimizing the voltage gain error, the LTC6244 provides excellent DC precision. It features 1pA bias current and less than 100uV input offset voltage at 25oC. Offset voltage drift is guaranteed under 2.5uV/°C while the high voltage gain of 120dB keeps system error to a minimum. The 50MHz gain bandwidth and 40V/us slew rate at a low supply current of 7.4mA max per amplifier makes this amplifier extremely versatile and perfect for use in a wide variety of applications.
Operating from supply voltages as low as 2.8V and up to 12V (HV version), the amplifier’s output swings rail-to-rail. The LTC6244 dual op amp is offered in tiny 3mm x 3mm DFN and 8-pin MSOP packages. Fully specified to operate over the commercial, industrial, and high temperature ranges, 1,000-piece pricing starts at $1.65 each.
Summary of Features: LTC6244
• Low Noise:
en(1kHz): 8nV/√Hz typ
in (1kHz): 0.56 fA/√Hz typ
• Low Bias Current: 1pA typ
• Low Offset Voltage: 100uV Max @ 25°C, 300uV Max Over Temp
• Low Offset Voltage Drift: 2.5uV/C Max
• Low Input Capacitance: 2.1pF Common Mode, 3.5pF Differential
• Gain Bandwidth Product: 50MHz typ
• Slew Rate: 40V/us typ
• Rail-to-Rail Outputs
• Supply Current: 7.4 mA/amplifier
• Supply Range:
2.8V to 6V (LTC6244)
2.8V to 12V (LTC6244HV)
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