MTI8421 高压、中速、增益设置，带有一个外部电阻器， 精密仪表放大器

The MTI8421 is a low cost, low power, low noise,
ultralow bias current, high speed instrumentation
amplifier that is ideally suited for a broad spectrum of
signal conditioning and data acquisition applications.
This device features high CMRR, allowing the device
to extract low level signals in the presence of high
frequency common-mode noise over a wide
temperature range.
The 10 MHz small signal bandwidth, 35 V/μs slew
rate, and 0.6 μs settling time to 0.001% (gain = 10)
allow the MTI8421 to amplify high speed signals and
excel in applications that require high channel count,
multiplexed systems. Even at higher gains, the
current feedback architecture maintains high
performance. For example, at gain = 100, the
bandwidth is 2 MHz and the settling time is 0.8
μs.The MTI8421 has excellent distortion
performance, making this device suitable for use in
demanding applications such as vibration analysis.
The MTI8421 delivers 3 nV/√Hz input voltage noise
and 200 fA/√Hz current noise spectral density with
only 2 mA quiescent current, making the device an
ideal choice for measuring low level signals. For
applications with high source impedance, the
MTI8421 employs innovative process technology
and design techniques to provide noise performance
that is limited only by the sensor.
The MTI8421 uses unique protection methods to
ensure robust inputs while still maintaining low noise.
This protection allows input voltages up to 40 V from
the opposite supply rail without damage to the
device. A single resistor sets the gain from 1 to
10,000. The reference pin can be used to apply a
precise offset to the output voltage.
FEATURES
 Slew rate:35V/μs
 Bandwidth10MHz(G=1)
 CMRR:84dB(G=1)
 Gain range:1 to 10000
 Low Offset Voltage: 25μV (Typical)
 Low Noise:3.2nV/√ Hz (input voltage noise at 1
kHz)
 Quiescent Current: 2.3mA(Max)
 Operation Temperature Range: -55°C to 125°C
APPLICATIONS
 Medical instrumentation
 Precision data acquisition
 Microphone preamplification
 Vibration analysis
 Multiplexed input applications
 ADC driver