By Maxim Integrated 98
Maxim's MAX86140 and MAX86141 are ultra-low-power, completely integrated, optical data acquisition systems. On the transmitter side, the IC has three programmable high-current LED drivers that can be configured to drive up to six LEDs. With two devices working in master-slave mode, the LED drivers can drive up to twelve LEDs. On the receiver side, the MAX86140 has a single optical readout channel and the MAX86141 has two that can operate simultaneously. Both ICs have a low-noise signal conditioning analog front-end (AFE) which includes a 19-bit ADC, an industry-lead ambient light cancellation (ALC) circuit, and a picket fence detect-and-replace algorithm. The devices offer low power consumption, compact size, an industry-lead ambient light rejection and are easy/flexible-to-use.
The MAX86140 and MAX86141 operate on a 1.8 V main supply voltage and a 3.1 V to 5.5 V LED driver supply voltage. Both devices support standard SPI compatible interface and fully autonomous operation. The devices offer a large 128-word built-in FIFO and are available in a compact wafer-level package (20-WLP).
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