2 LC MOS 16-Bit Voltage Output DAC Data Sheet AD7846 FEATURES FUNCTIONAL BLOCK DIAGRAM V V CC DD 16-bit monotonicity over temperature 21 4 2 LSBs integral linearity error V REF+ 7 AD7846 Microprocessor compatible with readback capability R R 6 R IN A2 Unipolar or bipolar output R 16 Multiplying capability SEGMENT R SWITCH 5 V Low power (100 mW typical) A3 OUT MATRIX 12-BIT DAC R 12 A1 23 CS V 8 REF DAC LATCH 22 4 R/W CONTROL 12 LOGIC 25 LDAC I/O LATCH 24 CLR 9 10 3 20 V DB15 DB0 DGND SS Figure 1. GENERAL DESCRIPTION The AD7846 is a 16-bit DAC constructed with the Analog Devices, This means that the DAC output can be reset to 0 V in both the 2 Inc., LC MOS process. It has V and V reference inputs unipolar and bipolar configurations. REF+ REF and an on-chip output amplifier. These can be configured to The AD7846 is available in 28-lead plastic, ceramic, and PLCC give a unipolar output range (0 V to +5 V, 0 V to +10 V) or packages. bipolar output ranges (5 V, 10 V). PRODUCT HIGHLIGHTS The DAC uses a segmented architecture. The four MSBs in the 1. 16-Bit Monotonicity DAC latch select one of the segments in a 16-resistor string. The guaranteed 16-bit monotonicity over temperature Both taps of the segment are buffered by amplifiers and fed to a makes the AD7846 ideal for closed-loop applications. 12-bit DAC, which provides a further 12 bits of resolution. This 2. Readback architecture ensures 16-bit monotonicity. Excellent integral The ability to read back the DAC register contents linearity results from tight matching between the input offset minimizes software routines when the AD7846 is used in voltages of the two buffer amplifiers. ATE systems. In addition to the excellent accuracy specifications, the AD7846 3. Power Dissipation also offers a comprehensive microprocessor interface. There are Power dissipation of 100 mW makes the AD7846 the 16 data I/O pins, plus control lines (CS, R/W, LDAC and CLR). lowest power, high accuracy DAC on the market. R/W and CS allow writing to and reading from the I/O latch. This is the readback function, which is useful in ATE applications. LDAC allows simultaneous updating of DACs in a multi-DAC CLR system and the line will reset the contents of the DAC latch W to 00000 or 10000 depending on the state of R/ . Rev. H Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20002017 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com 08490-001AD7846* PRODUCT PAGE QUICK LINKS Last Content Update: 08/15/2017 COMPARABLE PARTS DISCUSSIONS View a parametric search of comparable parts. View all AD7846 EngineerZone Discussions. DOCUMENTATION SAMPLE AND BUY Data Sheet Visit the product page to see pricing options. AD7846: LC2MOS16-Bit Voltage Output DAC Data Sheet TECHNICAL SUPPORT AD7846: Military Data Sheet Submit a technical question or find your regional support number. REFERENCE MATERIALS Solutions Bulletins & Brochures DOCUMENT FEEDBACK Digital to Analog Converters ICs Solutions Bulletin Submit feedback for this data sheet. DESIGN RESOURCES AD7846 Material Declaration PCN-PDN Information Quality And Reliability Symbols and Footprints This page is dynamically generated by Analog Devices, Inc., and inserted into this data sheet. A dynamic change to the content on this page will not trigger a change to either the revision number or the content of the product data sheet. This dynamic page may be frequently modified.