a FEATURES 12-Bit Multiplying DACs Guaranteed Specifications with +3.3 V/+5 V Supply 0.5 LSBs INL and DNL Low Power: 5 µW typ Fast Interface 40 ns Strobe Pulse Width (AD7943) 40 ns Write Pulse Width (AD7945, AD7948) Low Glitch: 60 nV-s with Amplifier Connected Fast Settling: 600 ns to 0.01% with AD843 APPLICATIONS Battery-Powered Instrumentation Laptop Computers Upgrades for All 754x Series DACs (5 V Designs)
+3.3 V/+5 V Multiplying 12-Bit DACs AD7943/AD7945/AD7948 FUNCTIONAL BLOCK DIAGRAMS VDD
12-BIT DAC IOUT2 AGND
CLR DAC REGISTER
The AD7943, AD7945 and AD7948 are fast 12-bit multiplying DACs that operate from a single +5 V supply (Normal Mode) and a single +3.3 V to +5 V supply (Biased Mode). The AD7943 has a serial interface, the AD7945 has a 12-bit parallel interface, and the AD7948 has an 8-bit byte interface. They will replace the industry-standard AD7543, AD7545 and AD7548 in many applications, and they offer superior speed and power consumption performance.
The AD7943 is available in 16-pin DIP, 16-pin SOP (Small Outline Package) and 20-pin SSOP (Shrink Small Outline Package).
The AD7945 is available in 20-pin DIP, 20-pin SOP and 20-pin SSOP. The AD7948 is available in 20-pin DIP, 20-pin SOP and 20-pin SSOP.
INPUT SHIFT REGISTER
AD7948 12 DF/DOR
DATA OVERRIDE LOGIC
DAC REGISTER 12 INPUT REGISTERS
WR CONTROL LOGIC
12 CSMSB DATA STEERING LOGIC 8 DB7–DB0
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