DAC161P997CISQ/NOPB ,Single-Wire 16-bit DAC for 4-20mA Loops 16-WQFN -40 to 105features makes theDAC161P997 ideal for 2- and 4-wire industrial• Two-Wire, 4-20 mA Current Loop Tra ..
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DL5264 , 500 mW Zener Diode 2.4 to 200 Volts
DL5265 , 500 mW Zener Diode 2.4 to 200 Volts
DL5266 , 500 mW Zener Diode 2.4 to 200 Volts
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DL5268 , 500 mW Zener Diode 2.4 to 200 Volts
DL5269 , 500 mW Zener Diode 2.4 to 200 Volts
DAC161P997CISQ/NOPB
Single-Wire 16-bit DAC for 4-20mA Loops
BASE
DBACK
LOW
DIN
ERRLVL
ACKB
LDO
Industrial 4-20mA Transmitter
0-24 mA Loop
LOOP
SUPPLY
LOOP
RECEIVER
Single W
80k
IDAC
DAC161P997LOOP+
ERRB
XFRMR
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Design
DAC161P997SNAS515G –JULY 2011–REVISED DECEMBER 2014
DAC161P997 Single-Wire 16-bit DAC for4- to 20-mA Loops Features 3 DescriptionThe DAC161P997isa 16-bit ∑Δ digital-to-analog 16-Bit Linearity converter (DAC) for transmitting an analog output• Single-Wire Interface (SWIF), with Handshake current over an industry standard 4-20 mA current• Digital Data Transmission (No Lossof Fidelity) loop.It offers 16-bit accuracy witha low output
current temperature coefficient (29 ppm/°C) and• Pin Programmable Power-Up Condition excellent long-term output current drift (90 ppmFS)• Self Adjustingto Input Data Rate while consuming less than 190 µA.• Loop Error Detection and Rreporting The data linkto the DAC161P997isa Single Wire• Programmable Output Current Error Level Interface (SWIF) which allows sensor data to be• No External Precision Components transferred in digital format over an isolation
boundary usinga single isolation component. The• Simple Interfaceto HART Modulator
DAC161P997’s digital input is compatible with• Small Package: WQFN-16(4x4 mm, 0.5 mm standard isolation transformers and opto-couplers.Pitch) Error detection and handshaking features within the• Key Specifications SWIF protocol ensure error free communication
across the isolation boundary. For applications where– Output Current TempCo:29 ppmFS/°C (Max)
isolationis not required, the DAC161P997 interfaces– Long-Term Output Current Drift:90 ppmFS directlytoa microcontroller.(Typ)
The loop driveof the DAC161P997 interfacestoa– INL: 3.3/−2.1 µA(Max) HART (Highway Addressable Remote Transducer)– Total Supply Current: 190 µA (Max) modulator, allowing injectionof FSK modulated digital
data into the 4-20 mA current loop. This combination
2 Application of specifications and features makes the
DAC161P997 ideal for 2- and 4-wire industrial• Two-Wire, 4-20 mA Current Loop Transmitter transmitters.• Industrial Process Control
The DAC161P997is availableina 16–lead WQFN• Actuator Control package andis specified over the extended industrial• Factory Automation temperature rangeof -40°Cto 105°C.• Building Automation
Device Information(1)• Precision Instruments• Data Acquisition Systems• Test Systems
(1) Forall available packages, see the orderable addendumat
the endofthe datasheet.
Simplified Schematic
