1998 Jul 02 3
Philips Semiconductors Product specification
8-bit A/D and D/A converter PCF8591
1 FEATURES
• Single power supply
• Operating supply voltage 2.5 V to 6 V
• Low standby current
• Serial input/output via I
2
C-bus
• Address by 3 hardware address pins
• Sampling rate given by I
2
C-bus speed
• 4 analog inputs programmable as single-ended or
differential inputs
• Auto-incremented channel selection
• Analog voltage range from V
SS
to V
DD
• 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 converter 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
2
C-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
2
C-bus without
additional hardware. Address, control and data to and from
the device are transferred serially via the two-line
bidirectional I
2
C-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
2
C-bus.
4 ORDERING INFORMATION
TYPE
NUMBER
PACKAGE
NAME DESCRIPTION VERSION
PCA8591P DIP16 plastic dual in-line package; 16 leads (300 mil); long body SOT38-1
PCA8591T SO16 plastic small outline package; 16 leads; body width 7.5 mm SOT162-1
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