DAC161S997 SPI-Programmable DAC Datasheet

DAC161S997 Datasheet, PDF, Equivalent


Part Number

DAC161S997

Description

16-Bit SPI-Programmable DAC

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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DAC161S997
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DAC161S997
SNAS621A – JUNE 2013 – REVISED DECEMBER 2014
DAC161S997 16-Bit SPI-Programmable DAC for 4-20 mA Loops
1 Features
1 16-Bit Resolution
• Very-Low Supply Current of 100 µA
• 5 ppmFS/°C Gain Error
• Pin-Programmable Power-Up Condition
• Loop-Error Detection and Reporting
• Programmable Output-Current Error Levels
• Simple HART Modulator Interfacing
• Highly Integrated Feature Set in Small Footprint
WQFN-16 (4- × 4-mm, 0.5-mm Pitch)
2 Applications
• Two-Wire 4- to 20-mA Current-Loop Transmitter
• Loop-Power Transmitters
• Industrial Process Control
• Actuator Control
3 Description
The DAC161S997 is a very low power 16-bit ΣΔ
digital-to-analog converter (DAC) for transmitting an
analog output current over an industry standard 4-20
mA current loop. The DAC161S997 has a simple 4-
wire SPI for data transfer and configuration of the
DAC functions. To reduce power and component
count in compact loop-powered applications, the
DAC161S997 contains an internal ultra-low power
voltage reference and an internal oscillator. The low
power consumption of the DAC161S997 results in
additional current being available for the remaining
portion of the system. The loop drive of the
DAC161S997 interfaces to a Highway Addressable
Remote Transducer (HART) modulator, allowing
injection of FSK modulated digital data into the 4-20
mA current loop. This combination of specifications
and features makes the DAC161S997 ideal for 2- and
4-wire industrial transmitters. The DAC161S997 is
available in a 16-pin 4-mm × 4-mm WQFN package
and is specified over the extended industrial
temperature range of –40°C to +105°C.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DAC161S997
WQFN (16)
4.00 mm x 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Schematic
LDO
LOOP+
SCLK
CSB
SDI
SDO
VD
ERRB
VD VA
Internal
Reference
4-20 mA
Loop
ÐÂ DAC
16 IDAC
+
-
BASE
COMD
80k
DAC161S997
NC C1 C2 C3
COMA
40
OUT
ERRLVL
LOOP-
HART
Modulator
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

DAC161S997
DAC161S997
SNAS621A – JUNE 2013 – REVISED DECEMBER 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Simplified Schematic............................................. 1
5 Revision History..................................................... 2
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings ............................................................ 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 4
7.5 Electrical Characteristics........................................... 5
7.6 Timing Requirements ............................................... 6
7.7 Typical Characteristics .............................................. 7
8 Detailed Description .............................................. 8
8.1 Overview ................................................................... 8
8.2 Functional Block Diagram ......................................... 8
8.3 Feature Description................................................... 8
8.4 Device Functional Modes.......................................... 9
8.5 Programming .......................................................... 10
8.6 Register Maps ......................................................... 13
9 Application and Implementation ........................ 17
9.1 Application Information............................................ 17
9.2 Typical Application ................................................. 23
10 Power Supply Recommendations ..................... 29
11 Layout................................................................... 29
11.1 Layout Guidelines ................................................. 29
11.2 Layout Example .................................................... 29
12 Device and Documentation Support ................. 31
12.1 Trademarks ........................................................... 31
12.2 Electrostatic Discharge Caution ............................ 31
12.3 Glossary ................................................................ 31
13 Mechanical, Packaging, and Orderable
Information ........................................................... 31
5 Revision History
Changes from Original ( June 2013) to Revision A
Page
• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section ................................................................................................. 1
2 Submit Documentation Feedback
Copyright © 2013–2014, Texas Instruments Incorporated
Product Folder Links: DAC161S997


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community DAC161S997 SNAS621A – JUNE 2013 – REVISED DECEMBER 2014 DAC161S 997 16-Bit SPI-Programmable DAC for 4-2 0 mA Loops 1 Features •1 16-Bit Reso lution • Very-Low Supply Current of 1 00 µA • 5 ppmFS/°C Gain Error • P in-Programmable Power-Up Condition • Loop-Error Detection and Reporting • Programmable Output-Current Error Level s • Simple HART Modulator Interfacing • Highly Integrated Feature Set in S mall Footprint WQFN-16 (4- × 4-mm, 0.5 -mm Pitch) 2 Applications • Two-Wire 4- to 20-mA Current-Loop Transmitter Loop-Power Transmitters • Industria l Process Control • Actuator Control 3 Description The DAC161S997 is a very low power 16-bit ΣΔ digital-to-analo g converter (DAC) for transmitting an a nalog output current over an industry s tandard 4-20 mA current loop. The DAC16 1S997 has a simple 4wire SPI for data t ransfer and configuration of the DAC functions. To reduce power and component count in compact l.
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