GENERAL DESCRIPTION
The AD5371 contains 40 14-bit DACs in a single 80-lead LQFP or 100-ball CSP_BGA. The device provides buffered voltage outputs with a span of 4× the reference voltage. The gain and offset of each DAC can be independently trimmed to remove errors. For even greater flexibility, the device is divided into five groups of eight DACs. Three offset DACs allow the output range of the groups to be adjusted. Group 0 can be adjusted by Offset DAC 0, Group 1 can be adjusted by Offset DAC 1, and Group 2 to Group 4 can be adjusted by Offset DAC 2. The AD5371 offers guaranteed operation over a wide supply range, with VSSfrom −16.5 V to −4.5 V and VDDfrom 9 V to 16.5 V. The output amplifier headroom requirement is 1.4 V operating with a load current of 1 mA.

FEATURES
   40-channel DAC in 80-lead LQFP and 100-ball CSP_BGA
   Guaranteed monotonic to 14 bits
   Maximum output voltage span of 4 × VREF(20 V)
   Nominal output voltage span of −4 V to +8 V
   Multiple, independent output voltage spans available
   System calibration function allowing user-programmable
      offset and gain
   Channel grouping and addressing features
   Thermal shutdown function
   DSP/microcontroller-compatible serial interface
   SPI/LVDS serial interface
   2.5 V to 5.5 V digital interface
   Digital reset (RESET)
   Clear function to user-defined SIGGNDx
   Simultaneous update of DAC outputs

APPLICATIONS
   Level setting in automatic test equipment (ATE)
   Variable optical attenuators (VOA)
   Optical switches
   Industrial control systems
   Instrumentation