EMI Susceptibility Issue in Analog Front-End for Sensor Applications

Table 1

Measured EMI induced offset in commercial amplifiers.

Amplifier	Technology	Voltage offset	Critical frequencies
UA741	BJT	650 mV	0.1 MHz–3 GHz
AD705	BJT	350 mV	0.3 MHz–1 GHz
NE5534	BJT	360 mV	3 MHz–0.6 GHz
OPA177	BJT	360 mV	0.6 MHz–0.1 GHz
OP176	JFET In/BJT Out	200 mV	3 MHz–1 GHz
MC33181	JFET In/BJT Out	210 mV	6 MHz–0.6 GHz
CA3140	CMOS In/BJT Out	350 mV	0.1 MHz–1 GHz
ICL7611	CMOS	380 mV	0.3 MHz–0.3 GHz