Overview
The DAC161P997CISQ/NOPB is a 16-bit ΣΔ (Sigma-Delta) digital-to-analog converter (DAC) designed by Texas Instruments. This component is specifically engineered for transmitting an analog output current over an industry standard 4-20 mA current loop. It offers high accuracy with 16-bit resolution, a low output current temperature coefficient of 29 ppm/°C, and excellent long-term output current drift of 90 ppmFS. The DAC161P997 operates with a total supply current of less than 190 µA, making it energy-efficient. It is available in a compact 16-lead WQFN package and is specified over an extended industrial temperature range of -40°C to 105°C.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16-bit |
| Output Current Temperature Coefficient | 29 ppmFS/°C (Max) |
| Long-Term Output Current Drift | 90 ppmFS (Typ) |
| Integral Nonlinearity (INL) | 3.3/2.1 µA (Max) |
| Total Supply Current | 190 µA (Max) |
| Operating Temperature Range | -40°C to 105°C |
| Package Type | WQFN-16 (4 × 4 mm, 0.5 mm Pitch) |
| Voltage Supply Range | 2.7V ~ 3.6V |
Key Features
- 16-Bit Linearity
- Single-Wire Interface (SWIF) with Handshake
- Digital Data Transmission with No Loss of Fidelity
- Pin Programmable Power-Up Condition
- Self Adjusting to Input Data Rate
- Loop Error Detection and Reporting
- Programmable Output Current Error Level
- No External Precision Components Required
- Simple Interface to HART Modulator
- Compact WQFN-16 Package
Applications
- Two-Wire, 4-20 mA Current Loop Transmitter
- Industrial Process Control
- Actuator Control
- Factory Automation
- Building Automation
- Precision Instruments
- Data Acquisition Systems
- Test Systems
Q & A
- What is the resolution of the DAC161P997?
The DAC161P997 has a 16-bit resolution.
- What is the output current temperature coefficient of the DAC161P997?
The output current temperature coefficient is 29 ppmFS/°C (Max).
- What is the long-term output current drift of the DAC161P997?
The long-term output current drift is 90 ppmFS (Typ).
- What is the total supply current of the DAC161P997?
The total supply current is less than 190 µA.
- What is the operating temperature range of the DAC161P997?
The operating temperature range is -40°C to 105°C.
- What type of package does the DAC161P997 come in?
The DAC161P997 comes in a WQFN-16 package (4 × 4 mm, 0.5 mm Pitch).
- What is the voltage supply range for the DAC161P997?
The voltage supply range is 2.7V ~ 3.6V.
- Does the DAC161P997 require external precision components?
No, the DAC161P997 does not require external precision components.
- How does the DAC161P997 interface with HART modulators?
The DAC161P997 has a simple interface to HART modulators, allowing injection of FSK modulated digital data into the 4-20 mA current loop.
- What are some common applications of the DAC161P997?
Common applications include two-wire, 4-20 mA current loop transmitters, industrial process control, actuator control, factory automation, and precision instruments.
