AD5370

40-Channel,16-Bit, Serial Input, Voltage Output DAC AD5370 FEATURES 40-channel DAC in a 64-lead LFCSP and a 64-lead LQFP Guaranteed monotonic to 16 bits Maximum output voltage span of 4 × VREF (20 V) Nominal output voltage span of −4 V to +8 V Multiple, independent output 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 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 FUNCTIONAL BLOCK DIAGRAM DVCC VDD VSS AGND DGND LDAC SYNC SDI SCLK SDO BUSY RESET CLR CONTROL REGISTER 16 8 A/B SELECT 8 TO REGISTER MUX2 MUX 1 16 X1A REGISTER 16 X2A 16 REGISTER 16 X1B X2B 16 REGISTER 16 REGISTER 16 M REGISTER 16 C REGISTER SERIAL INTERFACE 16 X1A REGISTER 16 X1B 16 REGISTER 16 M REGISTER C REGISTER MUX 1 16 16 16 X2A 16 REGISTER X2B REGISTER STATE MACHINE 16 8 A/B SELECT 8 TO REGISTER MUX2 MUX 1 16 X1A REGISTER 16 X2A 16 REGISTER 16 X1B X2B 16 REGISTER 16 REGISTER 16 M REGISTER 16 C REGISTER AD5370 16 X1A REGISTER 16 X1B 16 REGISTER 16 M REGISTER C REGISTER MUX 1 16 16 16 X2A 16 REGISTER X2B REGISTER MUX 2 MUX 2 MUX 2 MUX 2 16 OFS0 16 ...