小型SOT23に収まる、超低コスト高精度インストゥルメンテーションアンプ
Note to Editor: The MAX4460/MAX4461/MAX4462 are the only precision instrumentation amplifiers on the market that fit in a tiny SOT23 package.
SUNNYVALE, CA-May 9, 2002-Maxim Integrated Products introduces the MAX4460/MAX4461/MAX4462 precision instrumentation amplifiers that achieve excellent input offset voltage (100µV typ at +25°C), fit in a tiny 6-pin SOT23 package, and sell for under $1. The combination of very small size, low cost, and high precision makes these parts ideal for use in strain gauge, piezo-electric sensor, and ECG medical applications.
The MAX4460 has adjustable gain while the MAX4461 and MAX4462 are available with gain internally trimmed to 0.1% accuracy at 1V/V, 10V/V, and 100V/V. Gain linearity is a low 0.05%. These devices feature CMOS inputs for an ultra-low 1pA input bias current. Typical CMRR and PSRR are 120dB and 100dB, respectively. All amplifier outputs swing within a few millivolts of either rail driving a 10k load, and their input common-mode range extends 200mV below ground. They operate from a 2.85V to 5.25V single-supply voltage and consume only 650µA of supply current. For power conservation, the MAX4461 offers a low-power shutdown mode that reduces the quiescent current to 0.1µA.
The MAX4460 and MAX4461 take a unipolar differential input signal and convert it to an amplified output voltage referred to GND. The MAX4462 has an input pin for an external REF voltage to set the DC zero-scale output voltage to allow bipolar signals in single-supply systems. REF is connected to GND for dual split-supply operation.
The MAX4460/MAX4461/MAX4462 have a gain-bandwidth product of 2.5MHz and low noise of only 18nV per root-Hz. All devices are specified for the extended-industrial temperature range (-40°C to +85°C). Prices start at $0.98 (1000-up, FOB USA).
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