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AD5678

Analog Devices
Part Number AD5678
Manufacturer Analog Devices
Description 4 x 12-Bit and 4 x 16-Bit Octal DAC
Published Jan 16, 2007
Detailed Description www.DataSheet4U.com 4 × 12-Bit and 4 × 16-Bit Octal DAC with On-Chip Reference in 14-Lead TSSOP AD5678 FEATURES Low pow...
Datasheet PDF File AD5678 PDF File

AD5678
AD5678

Overview
www.
DataSheet4U.
com 4 × 12-Bit and 4 × 16-Bit Octal DAC with On-Chip Reference in 14-Lead TSSOP AD5678 FEATURES Low power octal DAC with Four 16-bit DACs Four 12-bit DACs 14-lead/16-lead TSSOP On-chip 1.
25 V/2.
5 V, 5 ppm/°C reference Power down to 400 nA @ 5 V, 200 nA @ 3 V 2.
7 V to 5.
5 V power supply Guaranteed monotonic by design Power-on reset to zero scale 3 power-down functions Hardware LDAC and LDAC override function CLR function to programmable code Rail-to-rail operation AD5678 LDAC INPUT REGISTER INPUT REGISTER SCLK INTERFACE LOGIC INPUT REGISTER INPUT REGISTER INPUT REGISTER INPUT REGISTER INPUT REGISTER INPUT REGISTER POWER-ON RESET LDAC1 CLR1 1RU-16 FUNCTIONAL BLOCK DIAGRAM VDD VREFIN/VREFOUT 1.
25V/2.
5V REF DAC REGISTER DAC REGISTER DAC REGISTER DAC REGISTER DAC REGISTER DAC REGISTER DAC REGISTER DAC REGISTER STRING DAC A STRING DAC B STRING DAC C STRING DAC D STRING DAC E STRING DAC F STRING DAC G STRING DAC H BUFFER VOUTA BUFFER VOUTB BUFFER VOUTC SYNC BUFFER VOUTD DIN BUFFER VOUTE BUFFER VOUTF BUFFER VOUTG BUFFER VOUTH POWER-DOWN LOGIC GND 05299-001 APPLICATIONS Process control Data acquisition systems Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage current sources Programmable attenuators PACKAGE ONLY Figure 1.
GENERAL DESCRIPTION The AD5678 is a low power, octal, buffered voltage-output DAC with four 12-bit DACs and four 16-bit DACs in a single package.
All devices operate from a single 2.
7 V to 5.
5 V supply and are guaranteed monotonic by design.
The AD5678 has an on-chip reference with an internal gain of 2.
The AD5678-1 has a 1.
25 V 5 ppm/°C reference, giving a fullscale output of 2.
5 V; the AD5678-2 has a 2.
5 V 5 ppm/°C reference, giving a full-scale output of 5 V.
The on-board reference is off at power-up, allowing the use of an external reference.
The internal reference is enabled via a software write.
The part incorporates a power-on reset circuit that ensures that the DAC outp...


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