Overview
The AD9834BRU-REEL7, produced by Analog Devices Inc., is a 75 MHz low power Direct Digital Synthesizer (DDS) device. It is designed to produce high-performance sine and triangular outputs, making it an ideal component for various applications requiring precise waveform generation. The device also features an on-board comparator, enabling the generation of a square wave for clock purposes. With a power consumption of only 20 mW at 3 V, it is particularly suited for power-sensitive applications.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Output Frequency | Maximum output frequency | Up to 37.5 MHz |
| Power Supply | Operating voltage range | 2.3 V to 5.5 V |
| Power Consumption | Power consumption at 3 V | 20 mW |
| Frequency Resolution | Frequency resolution with 75 MHz clock rate | 0.28 Hz |
| Frequency Resolution | Frequency resolution with 1 MHz clock rate | 0.004 Hz |
| Temperature Range | Operating temperature range | −40°C to +105°C |
| Package Type | Package type | 20-lead TSSOP |
| Serial Interface | Serial interface clock rate | Up to 40 MHz |
| SFDR | Narrow-band Spurious-Free Dynamic Range | >72 dB |
Key Features
- High-performance sine and triangular outputs
- On-board comparator for generating square wave outputs
- Capability for phase modulation and frequency modulation
- 28-bit frequency registers for high resolution
- 3-wire SPI interface compatible with DSP and microcontroller standards
- Independent analog and digital power supplies (e.g., AVDD = 5 V, DVDD = 3 V)
- Power-down option with SLEEP pin for minimizing current consumption
- 10-bit DAC with adjustable full-scale output current
Applications
- Frequency stimulus and waveform generation
- Frequency phase tuning and modulation
- Low power RF and communications systems
- Liquid and gas flow measurement
- Sensory applications: proximity, motion, and defect detection
- Test and medical equipment
Q & A
- What is the maximum output frequency of the AD9834?
The AD9834 can produce output frequencies up to 37.5 MHz.
- What is the power consumption of the AD9834 at 3 V?
The power consumption is 20 mW at 3 V.
- What is the frequency resolution of the AD9834 with a 75 MHz clock rate?
The frequency resolution is 0.28 Hz with a 75 MHz clock rate.
- Does the AD9834 support phase and frequency modulation?
Yes, the AD9834 supports both phase and frequency modulation.
- What type of package is the AD9834 available in?
The AD9834 is available in a 20-lead TSSOP package.
- What is the operating temperature range of the AD9834?
The operating temperature range is −40°C to +105°C.
- Can the analog and digital sections of the AD9834 be powered independently?
Yes, the analog and digital sections can be powered from different power supplies.
- What is the purpose of the on-board comparator in the AD9834?
The on-board comparator allows for the generation of a square wave output for clock purposes.
- How does the AD9834 achieve power-down to minimize current consumption?
The AD9834 has a SLEEP pin that allows external control of the power-down mode, enabling sections of the device to be powered down when not in use.
- What is the maximum clock rate of the serial interface of the AD9834?
The serial interface operates at clock rates up to 40 MHz.
