Catalog
Single-Wire 16-bit DAC for 4-20mA Loops
Key Features
• 16-Bit LinearitySingle-Wire Interface (SWIF), with HandshakeDigital Data Transmission (No Loss of Fidelity)Pin Programmable Power-Up ConditionSelf Adjusting to Input Data RateLoop Error Detection and RreportingProgrammable Output Current Error LevelNo External Precision ComponentsSimple Interface to HART ModulatorSmall Package: WQFN-16 (4 × 4 mm, 0.5 mm Pitch)KeyOutput Current TempCo: 29 ppmFS/°C (Max)Long-Term Output Current Drift: 90 ppmFS (Typ)INL: 3.3/–2.1 µA(Max)Total Supply Current: 190 µA (Max)ApplicationTwo-Wire, 4-20 mA Current Loop TransmitterIndustrial Process ControlActuator ControlFactory AutomationBuilding AutomationPrecision InstrumentsData Acquisition SystemsTest SystemsAll trademarks are the property of their respective owners.16-Bit LinearitySingle-Wire Interface (SWIF), with HandshakeDigital Data Transmission (No Loss of Fidelity)Pin Programmable Power-Up ConditionSelf Adjusting to Input Data RateLoop Error Detection and RreportingProgrammable Output Current Error LevelNo External Precision ComponentsSimple Interface to HART ModulatorSmall Package: WQFN-16 (4 × 4 mm, 0.5 mm Pitch)KeyOutput Current TempCo: 29 ppmFS/°C (Max)Long-Term Output Current Drift: 90 ppmFS (Typ)INL: 3.3/–2.1 µA(Max)Total Supply Current: 190 µA (Max)ApplicationTwo-Wire, 4-20 mA Current Loop TransmitterIndustrial Process ControlActuator ControlFactory AutomationBuilding AutomationPrecision InstrumentsData Acquisition SystemsTest SystemsAll trademarks are the property of their respective owners.
Description
AI
The DAC161P997 is a 16-bit ΣΔ digital-to-analog converter (DAC) for transmitting an analog output current over an industry standard 4-20 mA current loop. It offers 16-bit accuracy with a low output current temperature coefficient (29 ppm/°C) and excellent long-term output current drift (90 ppmFS) while consuming less than 190 µA.
The data link to the DAC161P997 is a Single Wire Interface (SWIF) which allows sensor data to be transferred in digital format over an isolation boundary using a single isolation component. The DAC161P997’s digital input is compatible with standard isolation transformers and opto-couplers. Error detection and handshaking features within the SWIF protocol ensure error free communication across the isolation boundary. For applications where isolation is not required, the DAC161P997 interfaces directly to a microcontroller.
The loop drive of the DAC161P997 interfaces to a HART (Highway Addressable Remote Transducer) modulator, allowing injection of FSK modulated digital data into the 4-20 mA current loop. This combination of specifications and features makes the DAC161P997 ideal for 2- and 4-wire industrial transmitters.
The DAC161P997 is available in a 16-lead WQFN package and is specified over the extended industrial temperature range of –40°C to 105°C.
The DAC161P997 is a 16-bit ΣΔ digital-to-analog converter (DAC) for transmitting an analog output current over an industry standard 4-20 mA current loop. It offers 16-bit accuracy with a low output current temperature coefficient (29 ppm/°C) and excellent long-term output current drift (90 ppmFS) while consuming less than 190 µA.
The data link to the DAC161P997 is a Single Wire Interface (SWIF) which allows sensor data to be transferred in digital format over an isolation boundary using a single isolation component. The DAC161P997’s digital input is compatible with standard isolation transformers and opto-couplers. Error detection and handshaking features within the SWIF protocol ensure error free communication across the isolation boundary. For applications where isolation is not required, the DAC161P997 interfaces directly to a microcontroller.
The loop drive of the DAC161P997 interfaces to a HART (Highway Addressable Remote Transducer) modulator, allowing injection of FSK modulated digital data into the 4-20 mA current loop. This combination of specifications and features makes the DAC161P997 ideal for 2- and 4-wire industrial transmitters.
The DAC161P997 is available in a 16-lead WQFN package and is specified over the extended industrial temperature range of –40°C to 105°C.
