Overview
The DAC8830IBDTG4, produced by Texas Instruments, is a single, 16-bit, serial-input, voltage-output digital-to-analog converter (DAC). This device operates on a single supply voltage ranging from 2.7 V to 5.5 V and is known for its ultra-low power consumption, typically around 5 μA. The DAC8830 is designed with a power-on reset function, ensuring the output is at a known state upon power-up, which is 0 V in unipolar mode.
The device features a standard 3-wire SPI-compatible interface, allowing data transfer speeds up to 50 M-bits/sec. It includes a segmented DAC architecture with a 12-bit R-2R ladder network and four MSBs decoded into 15 equal segments, providing high accuracy and linearity.
Key Specifications
| Parameter | Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Resolution | 16 | bits | |||
| Linearity Error | TA = +25°C | ±0.5 | ±2 | LSB | |
| Differential Linearity Error | TA = +25°C | ±0.5 | ±1 | LSB | |
| Gain Error | TA = –40°C to +85°C | ±1 | ±7 | LSB | |
| Zero Code Error | TA = –40°C to +85°C | ±0.25 | ±2 | LSB | |
| Output Impedance | 6.25 | kΩ | |||
| Settling Time | To 1/2 LSB of FS, CL = 10 pF | 1 | μs | ||
| Slew Rate | CL = 10 pF | 25 | V/μs | ||
| Power-Supply Voltage | 2.7 | 5.5 | V | ||
| Power-Supply Current | VDD = 3 V | 5 | 20 | μA | |
| Temperature Range | –40 | +85 | °C |
Key Features
- Ultra-Low Power Consumption: Typically 5 μA, making it suitable for battery-powered devices.
- High Resolution: 16-bit resolution providing precise analog output.
- Single Supply Operation: Operates from a single supply voltage between 2.7 V and 5.5 V.
- Unipolar Output: The DAC8830 provides a unipolar output swing ranging from 0 V to VREF.
- SPI-Compatible Interface: Supports data transfer speeds up to 50 M-bits/sec with a standard 3-wire SPI interface.
- Segmented DAC Architecture: Includes a 12-bit R-2R ladder network and four MSBs decoded into 15 equal segments for high accuracy and linearity.
- Power-On Reset: Ensures the output is at a known state (0 V) upon power-up.
- Low Output Impedance: 6.25 kΩ, allowing it to drive unbuffered loads of 60 kΩ.
Applications
- Industrial Control Systems: Used in control systems that require precise analog outputs.
- Medical Devices: Suitable for medical equipment due to its low power consumption and high accuracy.
- Aerospace and Defense: Applied in various aerospace and defense applications requiring reliable and precise digital-to-analog conversion.
- Automotive Systems: Used in automotive systems for control and monitoring functions.
- Consumer Electronics: Found in consumer electronics such as audio equipment and other devices requiring digital-to-analog conversion.
Q & A
- What is the resolution of the DAC8830?
The DAC8830 has a 16-bit resolution.
- What is the operating voltage range of the DAC8830?
The DAC8830 operates on a single supply voltage ranging from 2.7 V to 5.5 V.
- What is the typical power consumption of the DAC8830?
The typical power consumption is around 5 μA.
- Does the DAC8830 support bipolar output operation?
No, the DAC8830 only supports unipolar output operation. For bipolar operation, the DAC8831 should be used.
- What is the settling time of the DAC8830?
The settling time is 1 μs to 1/2 LSB of full scale with a load capacitance of 10 pF.
- What is the slew rate of the DAC8830?
The slew rate is 25 V/μs with a load capacitance of 10 pF.
- How does the DAC8830 handle power-on reset?
The DAC8830 has a power-on reset function that ensures the output is at 0 V upon power-up.
- What type of interface does the DAC8830 use for data transfer?
The DAC8830 uses a standard 3-wire SPI-compatible interface.
- What is the output impedance of the DAC8830?
The output impedance is 6.25 kΩ.
- What is the temperature range for specified performance of the DAC8830?
The specified performance temperature range is from –40°C to +85°C.
