描述 Description

The PCF8591 is a single-chip, single?supply low?power 8?bit CMOS data acquisitiondevice with four analog inputs, one analog output and a serial I2C?bus interface. Threeaddress pins A0, A1 and A2 are used for programming the hardware address, allowingthe use of up to eight devices connected to the I2C?bus without additional hardware.Address, control and data to and from the device are transferred serially via the two-linebidirectional I2C?bus.
The functions of the device include analog input multiplexing, on-chip track and holdfunction, 8-bit analog?to?digital conversion and an 8?bit digital?to?analog conversion. Themaximum conversion rate is given by the maximum speed of the I2C-bus.

特性 Features

Single power supply
Operating supply voltage 2.5 V to 6.0?V
Low standby current
Serial input/output via I2C-bus
I2C address selection by 3 hardware address pins
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.

應(yīng)用 Application

Supply monitoring
Reference setting
Analog control loops