MAX5391

The MAX5391/ MAX5393 are specified over the -40°C to +125°C automotive temperature range and are available in a 16-pin, 3mm x 3mm TQFN and a 14-pin TSSOP package, respectively. The MAX5391/MAX5393 dual 256-tap, volatile, lowvoltage linear taper digital potentiometers offer three end-to-end resistance values of 10kI, 50kI, and 100kI. Operating from a single +1.7V to +5.5V power supply, these devices provide a low 35ppm/°C end-to-end temperature coefficient. The devices feature an SPIK interface. The MAX5391/MAX5393 include two digital potentiometers in a voltage-divider configuration. The small package size, low supply voltage, low supply current, and automotive temperature range of the MAX5391/MAX5393 make the devices uniquely suitable for the portable consumer market, battery backup industrial applications, and the automotive market.

The features of MAX5391 can be summarized as (1)dual 256-tap linear taper positions; (2)single +1.7V to +5.5V supply operation; (3)low 12A quiescent supply current; (4)10k, 50k, and 100k end-to-end resistance values; (5)SPI-compatible interface; (6)wiper set to midscale on power-up; (7)-40°C to +125°C operating temperature range.

The absolute maximum ratings of MAX5391 are (1)VDD to GND: -0.3V to +6V; (2)H_, W_, L_ to GND: -0.3V to the lower of (VDD + 0.3V)or +6V; (3)all other pins to GND: -0.3V to +6V; (4)continuous current into H_, W_, and L_ MAX5391L/MAX5393L: ±5mA / MAX5391M/MAX5393M: ±2mA / MAX5391N/MAX5393N: ±1mA; (5)continuous power dissipation (TA = +70°C)14-pin TSSOP (derate 10mW/°C above +70°C): 796.8mW / 16-pin TQFN (derate 14.7mW/°C above +70°C): 1176.5mW; (6)operating temperature range: -40°C to +125°C; (7)junction temperature: +150°C; (8)storage temperature range: -65°C to +150°C; (9)lead temperature (soldering, 10s): +300°C; (10)soldering temperature (reflow): +260°C.