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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