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描述

The LTC72x family of single-, dual-, and quad- channel operational amplifiers represents a new generation of general-purpose, low-power op-amps. Featuring railto-rail input and output (RRIO) swings, low quiescent current (typical 750 µA) combined with a wide bandwidth (11 MHz) and very low noise (8 nV/√Hz at 10 kHz) makes this family very attractive for a variety of battery-powered applications that require a good balance between cost and performance, such as audio outputs, motor phase current sensing, photodiode amplification, barcode scanners and white goods. The low input bias current supports these amplifiers to be used in applications with mega-ohm source impedances.

The robust design of the LTC72x amplifiers provides ease-of-use to the circuit designer: unity-gain stability with capacitive loads of up to 300 pF, integrated RF/EMI rejection filter, no phase reversal in overdrive conditions, and high electro-static discharge (ESD) protection (5-kV HBM). The LTC72x amplifiers are optimized for operation at voltages as low as +1.8 V (± 0.9 V) and up to +5.5 V (± 2.75 V) at the temperature range of 0 ℃ to 70 ℃, and operation at voltages from +2.0 V (± 1.0 V) to +5.5 V (± 2.75 V) over the extended temperature range of -40 ℃ to +125 ℃.

The LTC725 (single) is available in both SOT23-5L and SC70-5L packages. The LTC726 (dual) is offered in SOIC-8L, MSOP-8L and TSSOP-8L packages. The quad-channel LTC728 is offered in QFN-16L ,SOIC-14L and TSSOP-14L packages

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优势和特点

  • Low Input Offset Voltage: ± 0.35 mV Maximum
  • Wide Unity-Gain Bandwidth: 11 MHz
  • High Slew Rate: 11 V/μs
  • Fast Settling: 0.26 μs to 0.1%
  • Low Noise: 8 nV/√Hz at 10 kHz
  • Rail-to-Rail Input and Output
  • Internal RF/EMI Filter
  • Single 1.8 V to 5.5 V Supply Voltage Range at 0 ℃ to 70 ℃
  • Low Supply Current: 750 μA at 5V Supply Per Amplifier
  • Extended Temperature Range: -40℃ to +125℃

应用

  • Battery-Powered Instruments:
– Consumer, Industrial, Medical, Notebooks
  • Audio Outputs
  • Motor Phase Current Sense
  • Photodiode Amplification
  • Sensor Signal Conditioning:
– Sensor Interfaces, Loop-Powered, Active Filters

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