Texas Instruments TL851 Sonar Ranging Control TL851CDRG4

The TL851 Sonar Ranging Control is a digital I2L integrated circuit designed for use with the TL852 sonar ranging receiver. It facilitates distance measurement from six inches to 35 feet and operates with a single supply voltage ranging from 4.5 V to 6.8 V. The device features an internal oscillator that can utilize a low-cost external ceramic resonator, specifically a 420-kHz resonator, to drive a 50-kHz electrostatic transducer. The TL851 initiates its cycle when the INIT pin is set high, transmitting a burst of 16 pulses. It includes an internal blanking feature that disables the receive input for 3.8 ms after initiation to prevent false readings from transducer ringing and echoes from nearby objects. The device also provides a synchronous 4-bit gain control output to adjust the gain of the TL852 receiver, with 12 steps available for fine-tuning. Operating temperature is specified from 0¬8C to 40¬8C, making it suitable for various applications within this range. The TL851 is TTL-compatible and interfaces effectively with electrostatic or piezoelectric transducers, making it a versatile choice for sonar applications.