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Features
- 2 synchronized DDS channels at 500 MSPS
- Independent frequency/phase/amplitude control between channels
- Matched latencies for frequency/phase/amplitude changes
- Excellent channel-to-channel isolation (>72 dB)
- Linear frequency/phase/amplitude sweeping capability
- Up to 16 levels of frequency/phase/amplitude modulation (pin-selectable)
- 2 integrated 10-bit digital-to-analog converters (DACs)
- Individually programmable DAC full-scale currents
- 0.12 Hz or better frequency tuning resolution
- 14-bit phase offset resolution
- 10-bit output amplitude scaling resolution
- Serial I/O port interface (SPI) with 800 Mbps data throughput
- Software-/hardware-controlled power-down
- Dual supply operation (1.8 V DDS core/3.3 V serial I/O)
- Multiple device synchronization
- Selectable 4× to 20× REFCLK multiplier (PLL)
- Selectable REFCLK crystal oscillator
- 56-lead LFCSP
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The AD9958 consists of two DDS cores that provide independent frequency, phase, and amplitude control on each channel. This flexibility can be used to correct imbalances between signals due to analog processing, such as filtering, amplification, or PCB layout related mismatches. Because both channels share a common system clock, they are inherently synchronized. Synchronization of multiple devices is supported.
The AD9958 can perform up to a 16-level modulation of frequency, phase, or amplitude (FSK, PSK, ASK). Modulation is performed by applying data to the profile pins. In addition, the AD9958 also supports linear sweep of frequency, phase, or amplitude for applications such as radar and instrumentation.
The AD9958 serial I/O port offers multiple configurations to provide significant flexibility. The serial I/O port offers an SPIcompatible mode of operation that is virtually identical to the SPI operation found in earlier Analog Devices, Inc., DDS products. Flexibility is provided by four data pins (SDIO_0 / SDIO_1 / SDIO_2 / SDIO_3) that allow four programmable modes of serial I/O operation.
The AD9958 uses advanced DDS technology that provides low power dissipation with high performance. The device incorporates two integrated, high speed 10-bit DACs with excellent wideband and narrow-band SFDR. Each channel has a dedicated 32-bit frequency tuning word, 14 bits of phase offset, and a 10-bit output scale multiplier.
The DAC outputs are supply referenced and must be terminated into AVDD by a resistor or an AVDD center-tapped transformer. Each DAC has its own programmable reference to enable different full-scale currents for each channel.
The DDS acts as a high resolution frequency divider with the REFCLK as the input and the DAC providing the output. The REFCLK input source is common to both channels and can be driven directly or used in combination with an integrated REFCLK multiplier (PLL) up to a maximum of 500 MSPS. The PLL multiplication factor is programmable from 4 to 20, in integer steps. The REFCLK input also features an oscillator circuit to support an external crystal as the REFCLK source. The crystal must be between 20 MHz and 30 MHz. The crystal can be used in combination with the REFCLK multiplier.
The AD9958 comes in a space-saving 56-lead LFCSP package. The DDS core (AVDD and DVDD pins) is powered by a 1.8 V supply. The digital I/O interface (SPI) operates at 3.3 V and requires the pin labeled DVDD_I/O (Pin 49) be connected to 3.3 V.
The AD9958 operates over the industrial temperature range of −40°C to +85°C.
Applications
- Agile local oscillators
- Phased array radars/sonars
- Instrumentation
- Synchronized clocking
- RF source for AOTF
- Single-side band suppressed carriers
- Quadrature communications
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AD9958
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Application Note 19
AN-851: A WiMax Double Downconversion IF Sampling Receiver Design (Rev.0)
AN-419: A Discrete, Low Phase Noise, 125 MHz Crystal Oscillator for the AD9850
AN-769: Generating Multiple Clock Outputs from the AD9540 (Rev.0)
AN-823: Direct Digital Synthesizers in Clocking Applications Time (Rev.0)
AN-543: High Quality, All-Digital RF Frequency Modulation Generation with the ADSP-2181 and the AD9850 DDS
AN-927: Determining if a Spur is Related to the DDS/DAC or to Some Other Source (For Example, Switching Supplies) (Rev.0)
AN-587: Synchronizing Multiple AD9850/AD9851 DDS-Based Synthesizers (Rev.0)
AN-939: Super-Nyquist Operation of the AD9912 Yields a High RF Output Signal (Rev.0)
AN-605: Synchronizing Multiple AD9852 DDS-Based Synthesizers (Rev.0)
AN-632: Provisionary Data Rates Using the AD9951 DDS as an Agile Reference Clock for the ADN2812 Continuous-Rate CDR (Rev.0)
AN-1576: Low Jitter Sampling Clock Generator for High Performance ADCs Using the AD9958 500 MSPS DDS or the AD9858 1 GSPS DDS and the AD9515 Clock Distribution IC (Rev.A)
AN-345: Grounding for Low-and-High-Frequency Circuits
AN-237: Choosing DACs for Direct Digital Synthesis
AN-280: Mixed Signal Circuit Technologies
AN-342: Analog Signal-Handling for High Speed and Accuracy
AN-423: Amplitude Modulation of the AD9850 Direct Digital Synthesizer
AN-557: An Experimenter’s Project for Incorporating the AD9850 Complete-DDS Device as a Digital LO Function in an Amateur Radio Transceiver*
AN-769: Generating Multiple Clock Outputs from the AD9540
AN-953: Direct Digital Synthesis (DDS) with a Programmable Modulus
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400-MSample DDSs Run On Only +1.8 VDC
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The Year of the Waveform Generator
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Synchronized Synthesizers Aid Multichannel Systems
Speedy A/Ds Demand Stable Clocks
DDS Device Provides Amplitude Modulation
DDS Applications
Digital Potentiometers Vary Amplitude In DDS Devices
Digital Waveform Generator Provides Flexible Frequency Tuning for Sensor Measurement
DDS Circuit Generates Precise PWM Waveforms
DDS Device Produces Sawtooth Waveform
DDS IC Initiates Synchronized Signals
DDS Design
DDS Simplifies Polar Modulation
DDS IC Plus Frequency-To-Voltage Converter Make Low-Cost DAC
Improved DDS Devices Enable Advanced Comm Systems
Integrated DDS Chip Takes Steps To 2.7 GHz
Basics of Designing a Digital Radio Receiver (Radio 101)
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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
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| AD9958BCPZ |
56-Lead LFCSP (8mm x 8mm)
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| AD9958BCPZ-REEL7 |
56-Lead LFCSP (8mm x 8mm)
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Feb 1, 2024
- 24_0009
Qualification of alternative Wafer Fab for TSMC 0.18um Mixed Signal CMOS Process
AD9958BCPZ
PRODUCTION
AD9958BCPZ-REEL7
Jun 9, 2021
- 20_0126
Conversion of Select Sizes LFCSP Products from Punched to Sawn and Transfer of Assembly Site to ASE Korea
AD9958BCPZ
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Feb 1, 2024
- 24_0009
Qualification of alternative Wafer Fab for TSMC 0.18um Mixed Signal CMOS Process
AD9958BCPZ
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AD9958BCPZ-REEL7
Jun 9, 2021
- 20_0126
Conversion of Select Sizes LFCSP Products from Punched to Sawn and Transfer of Assembly Site to ASE Korea
AD9958BCPZ
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AD9958BCPZ-REEL7
Software & Part Ecosystem
Evaluation Kits 1
EVAL-AD9958
AD9958 Evaluation Board
Product Detail
The AD9958 is a multichannel frequency synthesizer that incorporates two synchronous direct digital synthesis (DDS) cores with many user-programmable functions. The evaluation board software provides a graphical user interface for easy communication with the device along with many user-friendly features such as the “mouse-over effect.” Many elements of the software can be clarified by placing your mouse over the element. Figure 19 in the user guide shows how this feature works when users place their mouse over the Ref Clock box. The user guide is intended for use in conjunction with the AD9958 data sheet.
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ADIsimDDS (Direct Digital Synthesis)
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CN0186
Phase Coherent FSK Modulator
