描述
The LTC854x family of single-, dual- and quad- channel operational amplifiers isspecifically 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/√Hzat 1 kHz) makes this family very attractive for a variety of battery-powered applicationsthat require a good balance between cost and performance, such as audio outputs,consumer electronics, smoke detectors, portable medical devices and white goods. Thelow input bias current supports these amplifiers to be used in applications with mega-ohm source impedances.
The robust design of the LTC854x amplifiers provides ease-of-use to the circuitdesigner: unity-gain stability with capacitive loads of up to 500 pF, integrated RF/EMIrejection filter, no phase reversal in overdrive conditions, and high electro-staticdischarge (ESD) protection (5-kV HBM). The LTC854x amplifiers are optimized foroperation at voltages as low as +1.8 V (±0.9 V) and up to +5.5 V (±2.75 V) at thetemperature range of 0 ℃ to 70 ℃, and operation at voltages from +2.0 V (±1.0 V) to +5.5V (±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-channelLTC8544 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
