General Description
   The AK9240 is an Analog Front End with 12-bit 1MSPS A/D converter. It integrates a programmable gain amplifier (PGA) that is able to select the input current and the input voltage realizing to control the input range. An LED driver and auto power control circuits are also integrated, making the device suitable for compact optical encoders. The AK9240 is housed in a space-saving 20-pin QFN package.

FEATUREs
□ Simultaneous Sampling 12-bit SAR A/D Converter
□ Sampling Rate: 1MSPS
□ Differential Inputs
□ Current Input or Voltage Input Selectable
□ PGA Function
□ LED driver
□ Automatic Power Control Circuit
□ Low Pass Filter
□ S/(N+D): 71dB (Typ.) at 10kHz Input.
□ INL: ±1.25LSB (Max.)
□ DNL: ±1.0LSB (Max.)
□ Power Consumption: 17 mA (Typ.) at Voltage Input Mode, fs= 1MSPS
□ Power Supply: 2.7 ~ 5.5V
□ Operational Temperature Range (Ta): -40 ~ 105ºC
□ Small Package: 20-pin QFN (3mm x 3mm)