Overview
The DAC8718SRGZT from Texas Instruments is a low-power, octal, 16-bit digital-to-analog converter (DAC) designed for high-precision and versatile analog output applications. This device operates with either bipolar or unipolar output configurations, making it suitable for a wide range of industrial and communication systems. The DAC8718 features a high-speed serial interface compatible with 1.8V, 3V, and 5V logic, enabling seamless communication with DSPs or microprocessors. It is characterized by its low power consumption, high linearity, and minimal glitch performance, ensuring reliable operation over a temperature range of –40°C to +105°C.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Resolution | 16 | - | - | Bits |
| Output Voltage Range (Bipolar) | ±2V | - | ±16.5V | V |
| Output Voltage Range (Unipolar) | 0V | - | +33V | V |
| Linearity Error | ±4 | - | - | LSB |
| Differential Linearity Error | ±1 | - | - | LSB |
| Zero-Code Error (Before Calibration) | ±10 | - | - | LSB |
| Zero-Code Error (After Calibration) | ±1 | - | - | LSB |
| Settling Time | - | - | 15 | μs |
| Power Consumption (Per Channel) | - | - | 14.4 | mW |
| Operating Temperature Range | -40 | - | +105 | °C |
| Package Type | - | - | VQFN-48 | - |
Key Features
- Bipolar Output: ±2V to ±16.5V with dual power supplies.
- Unipolar Output: 0V to +33V with a single power supply.
- Low Power Consumption: 14.4mW per channel in bipolar supply configuration.
- High Linearity: ±4 LSB linearity error and ±1 LSB differential linearity error.
- Flexible System Calibration: Achieve ±1 LSB zero/full-scale error after user calibration.
- Programmable Gain and Offset: Gain options of x4/x6 and programmable offset using DAC offset registers.
- High-Speed SPI Interface: Up to 50MHz, compatible with 1.8V, 3V, and 5V logic.
- Channel Monitor Output: VMON pin for monitoring individual analog outputs and other signals.
- Daisy-Chain Capability with Sleep Mode: Enhances system design flexibility.
- Schmitt Trigger Inputs: Ensures reliable digital signal reception.
Applications
- Automatic Test Equipment: High precision and reliability make it suitable for automated testing.
- PLC and Industrial Process Control: Ideal for controlling industrial processes with high accuracy.
- Communications: Used in various communication systems requiring precise analog outputs.
Q & A
- What is the resolution of the DAC8718?
The DAC8718 has a resolution of 16 bits.
- What are the output voltage ranges for the DAC8718?
The output voltage ranges are ±2V to ±16.5V for bipolar and 0V to +33V for unipolar configurations.
- What is the typical power consumption per channel?
The typical power consumption per channel is 14.4mW in bipolar supply configuration.
- What is the settling time of the DAC8718?
The settling time is 15μs.
- Does the DAC8718 support daisy-chaining?
Yes, it supports daisy-chaining with sleep mode enhancement.
- What is the operating temperature range of the DAC8718?
The operating temperature range is –40°C to +105°C.
- What type of package does the DAC8718 come in?
The DAC8718 comes in a VQFN-48 package.
- Is the DAC8718 compatible with different logic levels?
Yes, it is compatible with 1.8V, 3V, and 5V logic levels.
- Can the DAC8718 be calibrated for better accuracy?
Yes, system-level calibration can be performed to achieve ±1 LSB zero/full-scale error.
- What are some common applications of the DAC8718?
Common applications include automatic test equipment, PLC and industrial process control, and communications systems.
