DESCRIPTION
iC-PD3948 is an optical sensor IC with integrated photodiodes whose signal currents are converted into output voltages by low-noise transimpedance amplifiers.
Due to a high transimpedance gain of typically 4 MΩ, output signal voltages of several hundred Millivolts are obtained at illumination levels of just 1 to 3 mW/cm2. In most cases complicated noise suppression measures are thus rendered unnecessary.

FEATURES
♦ Compact encoder sensor with differential scanning and sine
   outputs
♦ Phased-array design for excellent signal matching
♦ Reduced cross talk due to moderate track pitch
♦ Ultra low dark currents for operation to high temperature
♦ Low noise amplifiers with high transimpedance of typ. 4 MΩ
♦ Short-circuit-proof, low impedance voltage outputs for
   enhanced EMI tolerance
♦ Space saving QFN and optoBGA packages (RoHS compliant)
♦ Low power consumption from single 4.5 to 5.5 V supply
♦ Operational temperature range of -40 to +110 °C
♦ Code disc available
   (2048 PPR +C/D 1 PPR, diameter ∅39 mm)

APPLICATIONS
♦ Incremental sine encoders with
   commutation information
♦ Motor feedback encoder
♦ AC and BLDC motor systems