Description

The VMA344 – PCF8591 is a monolithically integrated, low-power, 8-bit CMOS data acquisition device. The PCF8591 has four analog inputs, one analog output and a serial I2C bus interface.
For testing purposes, the VMA344 contains a phototransistor, NTC and a trimmer which are connected to the PCF8591 by 3 jumpers.

Features

• single power supply
• operating supply voltage 2.5 V to 6.0 V
• low standby current
• serial input and output via I2C-bus
• max sampling rate given by I2C-bus speed
• 4 analog inputs configurable as single ended or differential inputs
• auto-incremented channel selection
• analog voltage range from VSS to VDD
• on-chip track and hold circuit
• 8-bit successive approximation A/D conversion
• multiplying DAC with one analog output