Analog Devices AD7397
The AD7396/AD7397 series of dual, 12-bit and 10-bit voltageoutput digital-to-analog converters are designed to operate from a single +3 V supply. The double buffered input structure allows the user to load the input registers one at a time, then a single load strobe tied to both LDA+LDB inputs will simultaneously update both DAC outputs.FEATURES
Micropower: 100● A/DAC 0.1
●A Typical Power Shutdown Single Supply +2.7 V to +5.5 V Operation Compact 1.1 mm Height TSSOP 24-Lead Package AD7396: 12-Bit Resolution AD7397: 10-Bit Resolution 0.9 LSB Differential Nonlinearity Error
APPLICATIONS
Automotive Output Span Voltage Portable Communications Digitally Controlled Calibration PC Peripherals LDA CS A/B DATA 12 3 V, Parallel Input Dual 12-Bit /10-Bit DACs AD7396/AD7397 FUNCTIONAL BLOCK DIAGRAM AD7396 DACA REGISTER VDD 12 12-BIT DACA VOUTA INPUTA REGISTER 1 INPUTB REGISTER 12 VREF LDB DACB REGISTER 12-BIT DACB VOUTB AGND DGND RS SHDNGENERAL DESCRIPTION
Built using a CBCMOS process, these monolithic DACs offer the user low cost and ease of use in single supply +3 V systems. Operation is guaranteed over the supply voltage range of +2.7 V to +5.5 V, making this device ideal for battery operated applications. A 12-bit wide data latch loads with a 45 ns write time allowing interface to fast processors without wait states. LDA and LDB can also be independently activated to immediately update their respective DAC registers.