GENERAL DESCRIPTION

The AD5378 contains 32 14-bit DACs in one CSPBGA package. The AD5378 provides a bipolar output range determined by the voltages applied to the VREF(+) and VREF(−) inputs. The maximum output voltage span is 17.5 V, corresponding to a bipolar output range of −8.75 V to +8.75 V, and is achieved with reference voltages of VREF(−) = −3.5 V and VREF(+) = +5 V. The AD5378 guarantees operation over a wide VSS/VDDsupply range from ±11.4 V to ±16.5 V. The output amplifier headroom requirement is 2.5 V operating with a load current of 1.5 mA, and 2 V operating with a load current of 0.5 mA.

FEATURES

32-channel DAC in 13 mm × 13 mm 108-lead CSPBGA

Guaranteed monotonic to 14 bits

Buffered voltage outputs

Output voltage span of 3.5 V × VREF(+)

Maximum output voltage span of 17.5 V

System calibration function allowing user-programmable

offset and gain

Pseudo differential outputs relative to REFGND

Clear function to user-defined REFGND (CLRpin)

Simultaneous update of DAC outputs (LDACpin)

DAC increment/decrement mode

Channel grouping and addressing features

Interface options

Parallel interface

DSP/microcontroller-compatible 3-wire serial interface

2.5 V to 5.5 V JEDEC-compliant digital levels

SDO daisy-chaining option

Power-on reset

Digital reset (RESETpin and soft reset function)

APPLICATIONS

Level setting in automatic test equipment (ATE)

Variable optical attenuators (VOAs)

Optical switches

Industrial control systems

APPLICATIONS

Level setting in automatic test equipment (ATE)

Variable optical attenuators (VOAs)

Optical switches

Industrial control systems

VCC= 2.7 V to 5.5 V; VDD= 11.4 V to 16.5 V; VSS= −11.4 V to −16.5 V; VREF(+) = +5 V; VREF(−) = −3.5 V; AGND = DGND = REFGND = 0 V; VBIAS= 5 V; CL= 200 pF to GND; RL= 11 kΩ to 3 V; gain = 1; offset = 0 V; all specifications TMINto TMAX, unless otherwise noted.