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 5 V supply per amplifier) and low noise, the LTC887x family is an excellent
choice for precision, low-current, 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 (3 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 LTC8875 (single) is available in both SOT23-5L and SOIC-8L packages. The LTC8876 (dual)
is offered in SOIC-8L and MSOP-8L packages. The quad-channel LTC8878 is offered in both
SOIC-14L and TSSOP-14L packages.
优势和特点
- Low Input Offset Voltage: ± 350 μV Maximum
- 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
- 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
