描述 Description

The AT8591 is a single-chip, single-supply low power 8-bit CMOS data acquisition device with four analog inputs, one analog output and a serial I2C-bus interface. Three address pins A0, A1 and A2 are used for programming the hardware address, allowing the 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-line bidirectional I2C-bus.The functions of the device include analog input multiplexing, on-chip track and hold function, 8-bit analog-to-digital conversion and an 8-bit digital-to-analog conversion. The maximum 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 V

· Low standby current

· Serial input/output via I2C-bus

· Address by 3 hardware address pins

· Sampling rate given by I2C-bus speed

· 4 analog inputs programmable 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

· Closed loop control systems

· Low power converter for remote data acquisition

· Battery operated equipment

· Acquisition of analog values in automotive, audio and TV applications.