Part # AD9834 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: AD9834 20 mW Power 2.3 V to 5.5 V 75 MHz Complete DDS Data Sheet (Rev. A)

Part Details:

20 mW Power, 2.3 V to 5.5 V, 75 MHz Complete DDS AD9834 FEATURES Capability for phase modulation and frequency modulation is Narrow-band SFDR >72 dB provided. The frequency registers are 28 bits; with a 75 MHz 2.3 V to 5.5 V power supply clock rate, resolution of 0.28 Hz can be achieved. Similarly, with Output frequency up to 37.5 MHz a 1 MHz clock rate, the AD9834 can be tuned to 0.004 Hz resolution. Frequency and phase modulation are affected by Sine output/triangular output loading registers through the serial interface and toggling the On-board comparator registers using software or the FSELECT pin and PSELECT pin, 3-wire SPI® interface respectively. Extended temperature range: -40°C to +105°C Power-down option The AD9834 is written to using a 3-wire serial interface. This 20 mW power consumption at 3 V serial interface operates at clock rates up to 40 MHz and is 20-lead TSSOP compatible with DSP and microcontroller standards. APPLICATIONS The device operates with a power supply from 2.3 V to 5.5 V. Frequency stimulus/waveform generation The analog and digital sections are independent and can be run Frequency phase tuning and modulation from different power supplies, for example, AVDD can equal Low power RF/communications systems 5 V with DVDD equal to 3 V. Liquid and gas flow measurement Sensory applications: proximity, motion, and defect The AD9834 has a power-down pin (SLEEP) that allows detection external control of the power-down mode. Sections of the Test and medical equipment device that are not being used can be powered down to minimize the current consumption. For example, the DAC can GENERAL DESCRIPTION be powered down when a clock output is being generated. The AD9834 is a 75 MHz low power DDS device capable of The part is available in a 20-lead TSSOP. producing 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 20 mW of power at 3 V makes the AD9834 an ideal candidate for power-sensitive applications. FUNCTIONAL BLOCK DIAGRAM AVDD AGND DGND DVDD CAP/2.5V REFOUT FS ADJUST REGULATOR ON-BOARD MCLK

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AD9834.pdf Datasheet