The Lock-In Amplifier ASIC is used for precision synchronous detection of low-level signals in industrial, medical, and communications applications. This highly >85dB linear So robustly detects signals as small as 1uV in the presence of large interferers with extremely high precision. This novel IC covers a wide bandwidth (1kHz-2MHz) and employs direct sampling with a 16bit Sigma-Delta ADC, digital demodulation and decimation filtering to avoid signal contamination common in down-mixed detectors in the presence of large interferers. The wideband AFE has an input noise density of 2nV/rt.Hz, two programmable Bandpass/Low Pass Tow-Thomas filters providing interferer rejection, and a programmable gain of 35-85dB. The SoC integrates a temperature sensor, precision references and capless LDO’s, calibration and BIST circuitry. Also integrated are 16uC, RAM and EEPROM together with SPI and UART communications. An FPGA system enabled digital design and boot sequence firmware validation in Silansys and also customer application firmware development in advance of first prototype availability. The SoC delivers full performance over a wide temperature range from -40C to +150C.
Package: LQFP 128
Application: Industrial, medical, and communications