ADI's AD9834/AD9837/AD9838 are low power direct digital synthesis (DSS) devices. The AD9834 and AD9837 produce high-performance sine and triangular outputs. The AD9834 consumes 20 mW of power at 3 V. The AD9838 produces high-performance sine and triangular outputs. It also has an on-board comparator that allows a square wave to be produced for clock generation. Consuming only 11 mW of power at 2.3 V, the AD9838 is an ideal candidate for power-sensitive applications.
These devices operate with a power supply from 2.3 V to 5.5 V. The analog and digital sections are independent and can be run from different power supplies; for example, AVDD can equal 5 V with DVDD equal to 3 V. The AD9834, AD9837, and AD9838 have a power-down pin (SLEEP) that allows external control of the power-down mode. Sections of the device that are not being used can be powered down to minimize the current consumption. For example, the DAC can be powered down when a clock output is being generated. The AD9834, AD9837, and AD9838 are ideal solutions for power-sensitive applications.
Features
- 2.3 V to 5.5 V power supply
- MCLK speed: 16 MHz (B grade), 5 MHz (A grade)
- Output frequency up to 8 MHz, 37.5 MHz
- Sinusoidal and triangular outputs
- On-board comparator
- 3-wire SPI interface
- Extended temperature ranges
- Power-down option
- 20 mW power consumption at 3 V (AD9834)
- 8.5 mW power consumption at 2.3 V (AD9837)
- 11 mW power consumption at 2.3 V (AD9838)
Applications
- Frequency stimulus/waveform generation
- Frequency phase tuning and modulation
- Low power RF/communications systems
- Liquid and gas flow measurement
- Test and medical equipment
- Sensory applications: proximity, motion, and defect detection
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ADI's AD9834/AD9837/AD9838 are low power direct digital synthesis (DSS) devices. The AD9834 and AD9837 produce high-performance sine and triangular outputs. The AD9834 consumes 20 mW of power at 3 V. The AD9838 produces high-performance sine and triangular outputs. It also has an on-board comparator that allows a square wave to be produced for clock generation. Consuming only 11 mW of power at 2.3 V, the AD9838 is an ideal candidate for power-sensitive applications.
