MAX5258

19-1844; Rev 1; 4/01 +3V/+5V, Low-Power, 8-Bit Octal DACs with Rail-to-Rail Output Buffers General Description The MAX5258/MAX5259 are +3V/+5V single-supply, digital serial-input, voltage-output, 8-bit octal digital-toanalog converters (DACs). Internal precision buffers swing Rail-to-Rail ® , and the reference input range extends from ground to the positive supply. The +5V (MAX5258) and the +3V (MAX5259) feature a 10µA (max) shutdown mode. The serial interface is double-buffered. A 16-bit input shift register is followed by eight 8-bit input registers and eight 8-bit DAC registers. The 16-bit serial word consists of two “don’t care” bits, three address bits, three control bits, and eight data bits. The input and DAC registers can both be updated independently or simultaneously with a single software command. The asynchronous control input (LDAC) provides simultaneous updating of all eight DAC registers. The interface is compatible with SPI™, QSPI™ (CPOL = CPHA = 0 or CPOL = CPHA = 1), and MICROWIRE™. A buffered digital data output allows daisy-chaining of serial devices. The MAX5258/MAX5259 are available in a 16-pin QSOP package. o Low Supply Current: 1.3mA o Low-Power Shutdown Mode 0.54mA (MAX5259) 0.80mA (MAX5258) o ±1LSB DNL (max) o ±1LSB INL (max) o Ground to VDD Reference Input Range o Output Buffer Amplifiers Swing Rail-to-Rail o 10MHz Serial Interface, SPI, QSPI (CPOL = CPHA = 0 or CPOL = CPHA = 1), and MICROWIRECompatible o Double-Buffered Registers for Synchronous U...