WM8015

The WM8015 is a kind of 8-bit voltage output digital to analogue converter (DAC) with buffered reference input (high impedance), and on-chip non-volatile memory. No special voltage supply is needed for programming the non-volatile memory. It operate from a standard 5 V supply, or else a ±5 V supply. Digital interfacing to the device is via a simple 3 pin serial interface and is CMOS/TTL and microprocessor compatible. The 10 bit command word includes 8 bits of data and a 2 bit instruction. The digital inputs feature schmitt triggers for high noise immunity.

The WM8015 is packaged in 8-pin small outline (SO) which allows digital control of analogue function in space critical applications. It is characteristised over commercial and industrial temperature ranges and does not require external trimming. The typical applications include: (1)programmable voltage source; (2)programmable attenuator; (3)telecommunications; (4)automatic test equipment; (5)industrial control; (6)replaces trim pots.

There are some features of the WM8015 as follows: (1)8 bit D to A converter; (2)on chip non-volatile memory; (3)guaranteed monotonicity; (4)single (5 V) or dual (±5 V) supply operation; (5)voltage output 0 V to 2.5 V or -5 to 2 V; (6)microprocessor, TTL, CMOS compatible; (7)high impedance reference voltage input; (8)buffered voltage output; (9)fast setting time (3 s to 0.5 LSB); (10)low power consumption (1.5 mA); (11)very small 8 pin SO package.

The following is about the absolute maximum ratings of the WM8015: (1)supply voltage, VDD-VSS: +11 V; (2)positive supply, VDD-GND: +7 V; (3)digital inputs: GND-0.3 to VDD+0.3 V; (4)reference input: VSS-0.3 to VDD+0.3 V; (5)operating temperature: -25 to +85; (6)storage temperature: -50 to +150; (7)lead temperature (soldering, 10s): +230.