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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 3 Description
The DAC161S997 is a very low power 16-bit ΣΔ
1
• 16-Bit Resolution
digital-to-analog converter (DAC) for transmitting an
• Very-Low Supply Current of 100 µA
analog output current over an industry standard 4-20
• 5 ppmFS/°C Gain Error
mA current loop. The DAC161S997 has a simple 4-
wire SPI for data transfer and configuration of the
• Pin-Programmable Power-Up Condition
DAC functions. To reduce power and component
• Loop-Error Detection and Reporting
count in compact loop-powered applications, the
• Programmable Output-Current Error Levels
DAC161S997 contains an internal ultra-low power
voltage reference and an internal oscillator. The low
• Simple HART Modulator Interfacing
power consumption of the DAC161S997 results in
• Highly Integrated Feature Set in Small Footprint
additional current being available for the remaining
WQFN-16 (4- × 4-mm, 0.5-mm Pitch)
portion of the system. The loop drive of the
DAC161S997 interfaces to a Highway Addressable
2 Applications
Remote Transducer (HART) modulator, allowing
injection of FSK modulated digital data into the 4-20
• Two-Wire 4- to 20-mA Current-Loop Transmitter
mA current loop. This combination of specifications
• Loop-Power Transmitters
and features makes the DAC161S997 ideal for 2- and
• Industrial Process Control
4-wire industrial transmitters. The DAC161S997 is
• Actuator Control
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
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.
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