Overview
The AD5780BCPZ-REEL7, produced by Analog Devices Inc., is a true 18-bit, unbuffered voltage output digital-to-analog converter (DAC). This component operates from a bipolar supply of up to 33 V, making it highly versatile for various applications. The AD5780 accepts a positive reference input range of 5 V to VDD - 2.5 V and a negative reference input range of VSS + 2.5 V to 0 V, with both reference inputs buffered on-chip, eliminating the need for external buffers. The DAC is known for its high accuracy, with a relative accuracy specification of ±1 LSB and guaranteed monotonic operation with a ±1 LSB differential nonlinearity (DNL) maximum range specification.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Resolution | 18 bits | ||||
| Supply Voltage | ±16.5 V | V | Bipolar supply | ||
| VREFP Input Range | 5 V | VDD - 2.5 V | V | ||
| VREFN Input Range | VSS + 2.5 V | 0 V | V | ||
| Input Bias Current (VREFP, VREFN) | -20 nA | -0.63 nA | 20 nA | nA | TA = 0°C to 105°C |
| Output Noise Spectral Density | 8 nV/√Hz | nV/√Hz | |||
| Long-term Linearity Error Stability | 0.025 LSB | LSB | |||
| Gain Error Temperature Coefficient | ±0.018 ppm/°C | ppm/°C | |||
| Output Voltage Settling Time | 2.5 µs | µs | |||
| Serial Interface Clock Rate | up to 35 MHz | MHz | |||
Key Features
- True 18-bit Accuracy: The AD5780BCPZ-REEL7 offers high precision with a relative accuracy specification of ±1 LSB and guaranteed monotonic operation with a ±1 LSB DNL maximum range specification.
- Wide Power Supply Range: Operates from a bipolar supply of up to ±16.5 V, making it suitable for a variety of applications.
- Buffered Reference Inputs: Both positive and negative reference inputs are buffered on-chip, eliminating the need for external buffers.
- Low Noise and High Stability: Features an output noise spectral density of 8 nV/√Hz and a long-term linearity error stability of 0.025 LSB.
- Fast Output Voltage Settling Time: Settles to the final output voltage in 2.5 µs.
- Versatile Serial Interface: Supports clock rates up to 35 MHz and is compatible with SPI, QSPI, MICROWIRE, and DSP interface standards.
- Power-on Reset and Output Clamp Feature: Ensures the DAC output powers up to 0 V in a known output impedance state and provides an output clamp feature for defined load states.
Applications
- Industrial Control Systems: Suitable for precision control and measurement in industrial environments.
- Aerospace and Defense: Used in applications requiring high accuracy and reliability.
- Medical Devices: Ideal for medical equipment that demands precise voltage output.
- Automotive Systems: Applicable in automotive control systems that require high precision and stability.
- Scientific Instruments: Used in various scientific instruments where precise voltage control is essential.
Q & A
- What is the resolution of the AD5780BCPZ-REEL7 DAC?
The AD5780BCPZ-REEL7 is a true 18-bit DAC.
- What is the operating voltage range of the AD5780BCPZ-REEL7?
The AD5780BCPZ-REEL7 operates from a bipolar supply of up to ±16.5 V.
- Do the reference inputs of the AD5780BCPZ-REEL7 require external buffers?
No, both reference inputs are buffered on-chip, eliminating the need for external buffers.
- What is the output noise spectral density of the AD5780BCPZ-REEL7?
The output noise spectral density is 8 nV/√Hz.
- How long does the output voltage take to settle in the AD5780BCPZ-REEL7?
The output voltage settles in 2.5 µs.
- What serial interface standards is the AD5780BCPZ-REEL7 compatible with?
The AD5780BCPZ-REEL7 is compatible with SPI, QSPI, MICROWIRE, and DSP interface standards.
- What is the purpose of the power-on reset circuit in the AD5780BCPZ-REEL7?
The power-on reset circuit ensures that the DAC output powers up to 0 V in a known output impedance state and remains in this state until a valid write to the device takes place.
- What is the output clamp feature of the AD5780BCPZ-REEL7?
The output clamp feature places the output in a defined load state.
- In what package is the AD5780BCPZ-REEL7 available?
The AD5780BCPZ-REEL7 is available in a 24-Lead LFCSP (4mm x 5mm w/ EP) package.
- What are some typical applications of the AD5780BCPZ-REEL7?
Typical applications include industrial control systems, aerospace and defense, medical devices, automotive systems, and scientific instruments.
