The MAX509BCWP+ is a quad, serial 8bit digital to analogue (DAC) with rail to rail outputs in 20 pin WSOIC package. It has four separate reference inputs allowing DAC's full-scale range to be set independently. Device communicates with microprocessors through a synchronous, full-duplex, 3-wire interface. Data is sent MSB first and can be transmitted in one 4-bit and one 8-bit packet or in one 12-bit word. If a 16-bit control word is used, the first four bits are ignored. A 4-wire interface adds a line for LDAC and allows asynchronous updating. The serial clock (SCLK) synchronizes the data transfer. Data is transmitted and received simultaneously.
Supply voltage range is 4.5V to 5.5V, -5.5V to 0V
Operating temperature range from 0°C to 70°C
Output buffer amplifier swing rail to rail
Reference input range includes both supply rails
Calibrated offset, gain and linearity (1LSB TUE)
10MHz serial interface, compatible with SPI, QSPI (CPOL = CPHA = 0) and MICROWIRE
Double-buffered registers for synchronous updating
Serial data output for daisy-chaining
Power-on reset clears serial interface and sets all registers to zero
(EN)
