Overview
The DAC7562SDGST is a dual-channel, low-power, buffered, voltage-output digital-to-analog converter (DAC) produced by Texas Instruments. This device is part of the DAC756x family, which includes 12-bit, 14-bit, and 16-bit resolutions. The DAC7562 specifically offers a 12-bit resolution. It is designed for applications requiring high accuracy, low power consumption, and a small footprint, making it ideal for portable, battery-operated equipment.
The device features an internal 2.5-V reference with a drift of 4 ppm/°C and can operate over a wide power-supply range of 2.7 V to 5.5 V. It includes a power-down feature that reduces current consumption to typically 550 nA at 5 V, enhancing its suitability for power-sensitive applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12 Bits | |
| Relative Accuracy | ±0.3 to ±0.75 LSB | |
| Differential Nonlinearity | ±0.05 to ±0.25 LSB | |
| Offset Error | ±1 to ±4 mV | |
| Full-Scale Error | ±0.03 to ±0.2 % FSR | |
| Output Voltage Range | 0 to AVDD V | |
| Output Voltage Settling Time | 10 µs (RL = 1 MΩ) | |
| Slew Rate | 0.75 V/µs (RL = ∞) | |
| Power Supply Range | 2.7 V to 5.5 V | |
| Operating Temperature Range | –40°C to 125°C | |
| Power Consumption (Normal Mode) | 0.2 to 1.4 mA (internal reference on/off) | |
| Power Consumption (Power-Down Mode) | 0.35 to 2 µA |
Key Features
- Internal Reference: 2.5-V internal reference with 4 ppm/°C drift.
- Low Power Consumption: Typical power-down current of 550 nA at 5 V.
- Wide Power-Supply Range: Operates from 2.7 V to 5.5 V.
- High Accuracy: Relative accuracy of ±0.3 to ±0.75 LSB and differential nonlinearity of ±0.05 to ±0.25 LSB.
- Output Buffer: Rail-to-rail operation with a slew rate of 0.75 V/µs.
- Communication Interface: 50-MHz SPI with Schmitt-triggered inputs.
- LDAC and CLR Functions: Asynchronous clear and load DAC functions.
- Package Options: Available in WSON-10 and VSSOP-10 packages.
Applications
- Portable Instrumentation: Ideal for battery-operated devices due to low power consumption.
- PLC Analog Output Module: Suitable for industrial control systems.
- Closed-Loop Servo Control: Used in precision control systems.
- Voltage Controlled Oscillator Tuning: For precise voltage control in oscillators.
- Data Acquisition Systems: For converting digital data into analog signals in data acquisition systems.
- Programmable Gain and Offset Adjustment: For adjustable gain and offset in various applications.
Q & A
- What is the resolution of the DAC7562SDGST?
The DAC7562SDGST has a 12-bit resolution.
- What is the internal reference voltage of the DAC7562SDGST?
The internal reference voltage is 2.5 V with a drift of 4 ppm/°C.
- What is the power consumption of the DAC7562SDGST in power-down mode?
The power consumption in power-down mode is typically 550 nA at 5 V.
- What is the operating temperature range of the DAC7562SDGST?
The operating temperature range is –40°C to 125°C.
- What communication interface does the DAC7562SDGST use?
The device uses a 50-MHz SPI interface with Schmitt-triggered inputs.
- What are the package options for the DAC7562SDGST?
The device is available in WSON-10 and VSSOP-10 packages.
- What is the slew rate of the output buffer in the DAC7562SDGST?
The slew rate is 0.75 V/µs.
- Does the DAC7562SDGST have a power-on reset feature?
Yes, the device has a power-on reset feature that sets the output to zero scale.
- What is the typical output voltage settling time of the DAC7562SDGST?
The typical output voltage settling time is 10 µs (RL = 1 MΩ).
- What are some common applications of the DAC7562SDGST?
Common applications include portable instrumentation, PLC analog output modules, closed-loop servo control, voltage-controlled oscillator tuning, and data acquisition systems.
