DESCRIPTION The AD9833 is a low power, programmable waveform generator capable of producing sine, triangular, and square wave outputs. Waveform generation is required in various types of sensing, actuation, and time domain reflectometry (TDR) applications. The output frequency and phase are software programmable, allowing easy tuning. No external components are needed. The frequency registers are 28 bits wide: with a 25 MHz clock rate, resolution of 0.1 Hz can be achieved; with a 1 MHz clock rate, the AD9833 can be tuned to 0.004 Hz resolution. The AD9833 has a standard serial interface that allows the part to interface directly with several microprocessors. The device uses an external serial clock to write the data or control information into the device. The AD9833 is written to via a 3-wire serial interface. This serial interface operates at clock rates up to 40 MHz and is compatible with DSP and microcontroller standards. The device operates with a power supply from 2.3 V to 5.5 V. The AD9833 has a power-down function (SLEEP). This allows sections of the device that are not being used to be powered down, thus minimizing the current consumption of the part, e.g., the DAC can be powered down when a clock output is being generated. FEATURES Digitally programmable frequency and phase 12.65 mW power consumption at 3 V 0 MHz to 12.5 MHz output frequency range 28-bit resolution: 0.1 Hz at 25 MHz reference clock Sinusoidal, triangular, and square wave outputs 2.3 V to 5.5 V power supply No external components required 3-wire SPI interface Power-down option TECHNICAL DETAILS Operating Voltage: 3.3V - 5V Input High Voltage: 1.7V - 2.8V Input Low Voltage: 0.5V - 0.7V Input Current: 10µA Input Capacitance: 3pF VOUT Maximum: 0.65V VOUT Minimum: 38mV VOUT Temperature Coefficient: 200° Update Rate: 25 (max) Operating Temperature: −40°C to +105°C Dimensions: 17mm x 12mm SHIPPING LIST 1x Programmable Waveform Generator AD9833
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