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Analog Devices Semiconductor Electronic Components Datasheet

AD5672R Datasheet

12-Bit nanoDAC+

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Data Sheet
Octal, 12-/16-Bit nanoDAC+ with
2 ppm/°C Reference, SPI Interface
AD5672R/AD5676R
FEATURES
GENERAL DESCRIPTION
High performance
High relative accuracy (INL): ±3 LSB maximum at 16 bits
Total unadjusted error (TUE): ±0.14% of FSR maximum
Offset error: ±1.5 mV maximum
Gain error: ±0.06% of FSR maximum
Low drift 2.5 V reference: 2 ppm/°C typical
Wide operating ranges
−40°C to +125°C temperature range
2.7 V to 5.5 V power supply range
Easy implementation
User selectable gain of 1 or 2 (GAIN pin/gain bit)
1.8 V logic compatibility
50 MHz SPI with readback or daisy chain
20-lead, RoHS-compliant TSSOP and LFCSP
APPLICATIONS
Optical transceivers
Base station power amplifiers
Process control (PLC input/output cards)
Industrial automation
Data acquisition systems
The AD5672R/AD5676R are low power, octal, 12-/16-bit buffered
voltage output digital-to-analog converters (DACs). They include
a 2.5 V, 2 ppm/°C internal reference (enabled by default) and a
gain select pin giving a full-scale output of 2.5 V (gain = 1) or
5 V (gain = 2). The devices operate from a single 2.7 V to 5.5 V
supply and are guaranteed monotonic by design. The AD5672R/
AD5676R are available in a 20-lead TSSOP and in a 20-lead LFCSP
and incorporate a power-on reset circuit and a RSTSEL pin that
ensures that the DAC outputs power up to zero scale or midscale
and remains there until a valid write. The AD5672R/AD5676R
contain a power-down mode, reducing the current consumption to
1 µA typical while in power-down mode.
Table 1. Octal nanoDAC+® Devices
Interface
Reference
16-Bit
SPI
Internal
AD5676R
External
AD5676
I2C
Internal
AD5675R
PRODUCT HIGHLIGHTS
1. High Relative Accuracy (INL).
AD5672R (12-bit): ±1 LSB maximum.
AD5676R (16-bit): ±3 LSB maximum.
2. Low Drift, 2.5 V On-Chip Reference.
12-Bit
AD5672R
Not applicable
AD5671R
FUNCTIONAL BLOCK DIAGRAM
VLOGIC
VDD
VREFOUT
AD5672R/AD5676R
SCLK
SYNC
SDI
SDO
LDAC
RESET
INPUT
REGISTER
INPUT
REGISTER
INPUT
REGISTER
INPUT
REGISTER
INPUT
REGISTER
INPUT
REGISTER
INPUT
REGISTER
INPUT
REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
2.5V
REF
STRING
DAC 0
BUFFER
STRING
DAC 1
BUFFER
STRING
DAC 2
BUFFER
STRING
DAC 3
BUFFER
STRING
DAC 4
BUFFER
STRING
DAC 5
BUFFER
STRING
DAC 6
BUFFER
STRING
DAC 7
BUFFER
VOUT0
VOUT1
VOUT2
VOUT3
VOUT4
VOUT5
VOUT6
VOUT7
POWER-ON
RESET
GAIN POWER-DOWN
×1/×2
LOGIC
RSTSEL
GAIN
GND
Figure 1.
Rev. D
Document Feedback
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rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2014–2018 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

AD5672R Datasheet

12-Bit nanoDAC+

No Preview Available !

AD5672R/AD5676R
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 3
Specifications..................................................................................... 4
AD5672R Specifications .............................................................. 4
AD5676R Specifications .............................................................. 6
AC Characteristics........................................................................ 8
Timing Characteristics ................................................................ 9
Daisy-Chain and Readback Timing Characteristics.............. 10
Absolute Maximum Ratings.......................................................... 12
Thermal Resistance .................................................................... 12
ESD Caution................................................................................ 12
Pin Configurations and Function Descriptions ......................... 13
Typical Performance Characteristics ........................................... 14
Terminology .................................................................................... 23
Theory of Operation ...................................................................... 25
Digital-to-Analog Converter .................................................... 25
Transfer Function ....................................................................... 25
DAC Architecture....................................................................... 25
Serial Interface ............................................................................ 26
Standalone Operation ................................................................ 27
Data Sheet
Write and Update Commands.................................................. 27
Daisy-Chain Operation ............................................................. 27
Readback Operation .................................................................. 28
Power-Down Operation ............................................................ 28
Load DAC (Hardware LDAC Pin) ........................................... 29
LDAC Mask Register ................................................................. 29
Hardware Reset (RESET) .......................................................... 30
Reset Select Pin (RSTSEL) ........................................................ 30
Software Reset............................................................................. 30
Amplifier Gain Selection on LFCSP ........................................ 30
Internal Reference Setup ........................................................... 30
Solder Heat Reflow..................................................................... 30
Long-Term Temperature Drift ................................................. 30
Thermal Hysteresis .................................................................... 31
Applications Information .............................................................. 32
Power Supply Recommendations............................................. 32
Microprocessor Interfacing....................................................... 32
AD5672R/AD5676R to ADSP-BF531 Interface..................... 32
AD5672R/AD5676R to SPORT Interface ............................... 32
Layout Guidelines....................................................................... 32
Galvanically Isolated Interface ................................................. 33
Outline Dimensions ....................................................................... 34
Ordering Guide .......................................................................... 35
Rev. D | Page 2 of 35


Part Number AD5672R
Description 12-Bit nanoDAC+
Maker Analog Devices
Total Page 30 Pages
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