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上传时间: 2011-01-09
详细说明： 1 FEATURES • Single power supply • Operating supply voltage 2.5 V to 6 V • Low standby current • Serial input/output via I 2C-bus • Address by 3 hardware address pins • Sampling rate given by I 2C-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. 2 APPLICATIONS • Closed loop control systems • Low power c onverter for remote data acquisition • Battery operated equipment • Acquisition of analog values in automotive, audio and TV applications. 3 GENERAL DESCRIPTION The PCF8591 is a single-chip, single-supply low power 8-bit CMOS data acquisition device with four analog inputs, one analog output and a serial I 2C-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 I 2C-bus without additional hardware. Address, control and data to and from the device are transferred serially via the two-line bidirectional I 2C-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 I 2C-bus ...展开收缩
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