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描述

The LTC854x family of single-, dual- and quad- channel operational amplifiers is

specifically designed for general-purpose cost-sensitive systems and applications.

Featuring rail-to-rail input and output (RRIO) swings, and low quiescent current

(typical 75 µA) combined with a wide bandwidth (1.5 MHz) and very low noise (25 nV/√Hz

at 1 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,

consumer electronics, smoke detectors, portable medical devices and white goods. The

low input bias current supports these amplifiers to be used in applications with megaohm source impedances.

The robust design of the LTC854x 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 LTC854x 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 LTC8541 (single) is available in both SOT23-5L and SC70-5L packages. The LTC8542

(dual) is offered in DFN2x2-8L, SOIC-8L and MSOP-8L packages. The quad-channel

LTC8544 is offered in QFN-16L, SOIC-14L and TSSOP-14L packages.


优势和特点

  • Precision Amplifiers for Cost-Sensitive Systems
  • Low Noise: 25 nV/√Hz at 1 kHz
  • Low Input Offset Voltage: 0.5 mV
  • 1.5 MHz GBW for Unity-Gain Stable
  • Micro-Power: 75 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℃


应用

  • Battery-Powered Instruments:

– Consumer, Industrial, Medical, Notebooks

  • Audio Outputs
  • Wireless Sensors:

– Home Security, Remote Sensing, Wireless Metering

  • Sensor Signal Conditioning:

– Sensor Interfaces, Loop-Powered, Active Filters


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