The LTC321A and LTC358A family of single- and dual- channel amplifiers provides inputoffset voltage correction for positive low offset (maximum 1.0 mV) and drift (1 µV/℃)through the use of proprietary techniques. Featuring rail-to-rail input and output swings,and low quiescent current (typical 85 µA) combined with a wide bandwidth of 1 MHz and very low noise (29 nV/√Hz at 1 kHz) makes this family very attractive for a variety of battery-powered applications such as handsets, tablets, notebooks, and portable medical devices. The low input bias current supports these amplifiers to be used in applications with mega-ohm source impedances.

The robust design of the LTC321A and LTC358A amplifiers provides ease-of-use to the circuit designer: unity-gain stability with capacitive loads of up to 500 pF, integrated RF/EMI rejection filter, no phase reversal in overdrive conditions, and high electro-static discharge (ESD) protection (5-kV HBM). The LTC321A and LTC358A 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 LTC321A (single) is available in SOT23-5L package. The LTC358A (dual) is offered in SOIC-8L and MSOP-8L packages.


Advantages And Characteristics

  • Precision: 1.0 mV Maximum Positive Input Offset Voltage
  • Low Noise: 29 nV/√Hz at 1 kHz
  • 1 MHz GBW for Unity-Gain Stable
  • Micro-Power: 85 μA Supply Current Per Amplifier
  • Single 1.8 V to 5.5 V Supply Voltage Range at 0 ℃ to 70 ℃
  • Rail-to-Rail Input and Output
  • Internal RF/EMI Filter
  • Extended Temperature Range: -40℃ to +125℃


  • Battery-Powered Instruments:
– Consumer, Industrial, Medical, Notebooks
  • Wireless Chargers
  • Audio Outputs
  • Sensor Signal Conditioning:
– Sensor Interfaces, Loop-Powered, Active Filters
  • Wireless Sensors:
– Home Security, Remote Sensing, Wireless Metering

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