The RedRock® RR142-1LD2-542/545 and RR142-1LD3-542/545 are multi-channel magnetic sensors with multiple output options ideal for use in medical, industrial, automotive, and consumer applications. Based on patented Tunneling Magnetoresistance (TMR) technology with seamless CMOS integration, the RR142 offers multiple configurations of several parameters to enable applications like proximity sensing, rotary sensing, and level detection.
The RR142-1LD2-542/545 and RR142-1LD3-542/545 feature both digital and analog channels. The RR142 offers an innovative new option to meet the needs of next generation applications. For “wake-up” applications, the analog output functionally is kept inactive until the sensor detects the removal of a nearby magnetic field (B < Brp). Once awakened, the analog circuitry stays on and continues to provide an output signal until sensor is reset (VDD is < VUVLO – FALL). This is particularly ideal for battery-powered, high-precision level and proximity sensing.
The digital channel features an operate sensitivity of 60 G (6 mT) with omnipolar magnetic field response. The analog channel offers a linear voltage output with a wide magnetic sensitivity range from -80 G to +80 G with a sensitivity of 5 mV/V/G. It offers a wide supply voltage range from 1.7 up to 5.5 V, ideal for applications ranging from small battery-powered electronics to industrial machinery. When in digital only mode, the RR142 operates at 12Hz until the analog channel is activated, at which point the operating frequency is increased to 100Hz. When operating in digital only mode, it has the world’s lowest current drain (150nA) for an active magnetic sensor operating at 12Hz. When in Digital+Analog mode, it has a current drain of 1.2 μA. The device has a wide operating temperature range of -40°C to 85°C (RR142-1LD2-542/545) or -40ºC to 125ºC (RR142-1LD3-532/545). (See Datasheet)