TUSS4440

Product Folder Order Now Technical Documents Tools & Software Support & Community TUSS4440 SLDS250 – DECEMBER 2019 TUSS4440 Transformer Drive Ultrasonic Sensor IC With Logarithmic Amplifier 1 Features 1 Integrated driver for transformer driven transducers and receiver stage with analog output for ultrasound applications 86-dB input dynamic range analog front-end – First stage low noise amplifier adjustable to 10, 12.5, 15 and 20 V/V – Configurable bandpass filter from 40 KHz to 500 KHz – Wide-band logarithmic amplifier Supported transducer frequencies (controlled by external clock) – 40 KHz to 400 KHz For low-power applications – Standby mode: 1.7 mA (typical) – Sleep mode: 220 µA (typical) Configurable drive stage: – Complimentary low-side drivers with current limit for transformer based transducer excitation – Configurable burst patterns using IO1 and IO2 pins Outputs: – Voltage output of the demodulated echo envelope on VOUT – Input signal zero crossing comparator output on OUT3 pin – Programmable VOUT threshold crossing on OUT4 pin Serial Peripheral Interface (SPI) for configuration by microcontroller (MCU) 2 Applications Position sensor Level transmitter Proximity sensor 3 Description The TUSS4440 is a highly integrated transformer drive analog front end for industrial ultrasonic applications. The transducer drive stage consists of low-side complementary drivers that can be configured to drive an ultrasonic transducer through a step-up transfor...