ams OSRAM AS7150 Optical Force Sensing Analog Front End
ams OSRAM AS7150 Optical Force Sensing Analog Front End (AFE) is a low noise, high dynamic range proximity detection AFE optimized for optical force sensing applications. This device consists of two low-noise ADC channels capable of simultaneous acquisition of two photodiodes. The AS7150 AFE features an integrated LED driver and a high integration factor, packaged in a small 1.67mm x 1.67mm WLCSP. The proximity function synchronizes IR emission and detection to sense nearby objects. This device's sensitivity, power consumption, and noise can be optimized with adjustable LED timing and power. The AS7150 AFE features a proximity engine that recognizes detect/release events and produces a configurable interrupt whenever the proximity result crosses the upper or lower threshold settings. Typical applications include mobile phones, tablets, smart glasses, and earbuds.
Features
- 5µm high Optical Fiber Sensors (OFSs) measurement resolution
- 20-bit true current input analog to digital converter
- High Signal to Noise ratio (90dB)
- On-chip averaging support
- Simultaneous proximity and force measurement
- State machine measurement range reconfiguration
- Up to 3 photodiode inputs
- Up to 3 LED inputs
- Small system footprint
- Tiny 1.68mm x 1.68mm x 0.4mm Wafer-Level-Chip-Scale-Package (WLCSP)
- Little external component count
- Ultra-low power consumption
- State machine triggered sleep mode
- 1.8V chip supply with 1.8V I2C bus
- Proximity IRQ function for MCU wakeup
- On-chip FIFO memory
Applications
- Mobile phones
- Tablets
- Smart glasses
- Earbuds
Specifications
- -0.3V to 5.5V LED pin voltage range
- 35mA Average LED ON current
- ±100mA input current (latch-up immunity)
- ±2kV ESDHBM
- ±500V ESDCDM
- Moisture Sensitivity Level (MSL) 1
- -30°C to 85°C operating temperature range
Block Diagram
Videos
Associated Products
ams OSRAM SFH 7061 Optical Force & Proximity Sensor Module
Features an integrated 940nm IR emitter and photodiode in a 1.8mm x 1mm x 0.5mm package.
Associated Evaluation Kit
ams OSRAM AS7150 & SFH 7061 Evaluation Kit
Evaluates force touch and proximity use cases with flexibility to test different material types.
Related Application
ams OSRAM Optical Force Sensing
Enables possibilities for multimodal controls, also featuring context-sensitive appearances.