The recommended operating voltage range for the TSL1401 is 2.7V to 5.5V.
The photodiodes should be connected between the PD+ and PD- pins, with the anode connected to PD+ and the cathode connected to PD-. The photodiodes should be connected in a reverse bias configuration.
The OFST pin is used to offset the output voltage of the TSL1401. It can be connected to a voltage source or a resistor divider network to adjust the output voltage range.
The gain of the TSL1401 can be adjusted by changing the value of the resistor connected between the RSET pin and GND. A smaller resistor value increases the gain, while a larger resistor value decreases the gain.
The maximum frequency of operation for the TSL1401 is 50 kHz. However, the actual frequency of operation may be limited by the specific application and the photodiodes used.