Overview
The DAC7551-Q1, produced by Texas Instruments, is a single-channel, 12-bit, voltage-output digital-to-analog converter (DAC) designed for high precision and low power consumption. This device is qualified for automotive applications and features exceptional linearity and monotonicity, along with ultra-low glitch energy. It operates from a single 2.7-V to 5.5-V supply, making it suitable for battery-operated and portable applications. The DAC7551-Q1 includes a power-on-reset circuit that ensures the output powers up to 0 V and remains at that voltage until a valid write cycle occurs. It also has a power-down feature that reduces current consumption to under 2 μA, enhancing its energy efficiency.
Key Specifications
| Parameter | Test Conditions | Min | Max | Units | |
|---|---|---|---|---|---|
| Resolution | 12 | Bits | |||
| Relative Accuracy (INL) | ±0.35 | LSB | |||
| Differential Nonlinearity | ±0.08 | LSB | |||
| Power Supply | 2.7 | 5.5 | V | ||
| Normal Operation Current (IDD) | VDD = 3.6V to 5.5V, VIH = IOVDD, VIL = GND | 100 | 150 | μA | |
| Power-Down Current (IDD) | VDD = 2.7V to 3.6V, VIH = IOVDD, VIL = GND | 0.05 | 2 | μA | |
| Settling Time | RL = 2 kΩ, 0 pF < CL < 200 pF | 5 | μs | ||
| Glitch Energy | 1 LSB change around major carry | 0.1 | nV-s | ||
| Temperature Range | -40 | +105 | °C |
Key Features
- Ultra-Low Glitch Energy: The DAC7551-Q1 features a proprietary architecture that minimizes glitch energy to 0.1 nV-s, providing high accuracy and stability.
- Low Power Operation: The device operates at a low current of 100 μA at 2.7 V and reduces to 0.05 μA in power-down mode.
- High Linearity and Monotonicity: The DAC ensures exceptional linearity with an integral linearity error of ±0.35 LSB and differential linearity error of ±0.08 LSB.
- Rail-to-Rail Voltage Output: The output amplifiers can drive a 2-kΩ, 200-pF load with a settling time of 5 μs.
- SPI-Compatible Serial Interface: The device supports a 3-wire serial interface up to 50 MHz, compatible with SPI, QSPI, Microwire, and DSP interface standards.
- Power-On Reset and Power-Down Feature: The device includes a power-on-reset circuit and a power-down feature to manage power consumption effectively.
- Daisy-Chain Capability: Multiple devices can be daisy-chained, allowing for the control of several DACs with shared SCLK and SYNC signals.
- Small Package Size: The DAC7551-Q1 is available in a small 12-pin USON package, making it suitable for compact designs.
Applications
- Portable, Battery-Powered Instruments: Ideal for devices that require low power consumption and high precision.
- Digital Gain and Offset Adjustment: Useful in applications requiring precise gain and offset adjustments.
- Programmable Voltage and Current Sources: Can be used in applications that need programmable voltage or current outputs.
- Programmable Attenuators: Suitable for applications requiring adjustable attenuation.
- Industrial Process Control: Used in industrial control systems for precise analog output control.
- ADAS Radar Applications: Applicable in advanced driver-assistance systems (ADAS) for radar applications.
Q & A
- What is the resolution of the DAC7551-Q1?
The DAC7551-Q1 has a resolution of 12 bits.
- What is the operating voltage range of the DAC7551-Q1?
The device operates from a single 2.7-V to 5.5-V supply.
- What is the typical current consumption of the DAC7551-Q1 during normal operation?
The typical current consumption is 100 μA at 2.7 V and 150 μA at 3.6 V to 5.5 V.
- How does the power-down feature work on the DAC7551-Q1?
The power-down feature reduces the current consumption to under 2 μA, and the device can be powered down while still allowing data updates on other channels.
- What is the settling time of the DAC7551-Q1?
The settling time is 5 μs for a 2-kΩ, 200-pF load.
- Is the DAC7551-Q1 compatible with SPI and other serial interfaces?
Yes, it is compatible with SPI, QSPI, Microwire, and DSP interface standards up to 50 MHz.
- What is the glitch energy of the DAC7551-Q1?
The glitch energy is typically 0.1 nV-s.
- What is the temperature range for the DAC7551-Q1?
The specified temperature range is –40°C to +105°C.
- Can multiple DAC7551-Q1 devices be daisy-chained?
Yes, multiple devices can be daisy-chained using shared SCLK and SYNC signals.
- What package type is the DAC7551-Q1 available in?
The DAC7551-Q1 is available in a 12-pin USON package.
