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描述
The LTC887x family of single-, dual-, and quad- channel amplifiers
features a maximized ratio of gain bandwidth (GBW) to supply current and
is ideal 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 and white goods.
Featuring rail-to-rail input and output swings, a wide bandwidth of
20-MHz combined with low supply current (typical 1.12 mA at 5V supply
per amplifier) and low noise, the LTC887x family is an excellent choice
for precision, lowcurrent, low-voltage, battery-powered applications.
The low input bias current supports these amplifiers to be used in
applications with mega-ohm source impedances.
The robust design
of the LTC887x amplifiers provides ease-of-use to the circuit designer:
integrated RF/EMI rejection filter, no phase reversal in overdrive
conditions, and high electro-static discharge (ESD) protection (5-kV
HBM). The LTC887x 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
LTC8871 (single) is available in both SOT23-5L and SOIC-8L packages. The
LTC8872 (dual) is offered in SOIC-8L and MSOP-8L packages. The
quad-channel LTC8874 is offered in both SOIC-14L and TSSOP-14L packages.
优势和特点
◼ Wide Unity-Gain Bandwidth: 20 MHz
◼ High Slew Rate: 22
V/μs
◼ Fast Settling: 250 ns to 0.1%
◼ Low Noise: 8 nV/√Hz
at 1 kHz
◼ Low Input Offset Voltage: ± 0.5 mV
◼
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
◼ Low
Supply Current: 1.12 mA at 5 V 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