AD9785
PRODUCTIONDual 12-Bit 800 MSPS DAC with Low Power 32-Bit Complex NCO
- Part Models
- 2
- 1ku List Price
- Starting From $28.04
Part Details
- Analog output: adjustable 8.7 mA to 31.7 mA, RL = 25 Ω to 50 Ω
- Low power, fine complex NCO allows carrier placement anywhere in DAC bandwidth while adding <300 mW power
- Auxiliary DACs allow I and Q gain matching and offset control
- Includes programmable I and Q phase compensation
- Internal digital upconversion capability
- Multiple chip synchronization interface
- High performance, low noise PLL clock multiplier
- Digital inverse sinc filter
- 100-lead, exposed pad TQFP package
The AD9785/AD9787/AD9788 are 12-bit, 14-bit, and 16-bit, high dynamic range TxDAC® devices, respectively, that provide a sample rate of 800 MSPS, permitting multicarrier generation up to the Nyquist frequency. Features are included for optimizing direct conversion transmit applications, including complex digital modulation, as well as gain, phase, and offset compensation. The DAC outputs are optimized to interface seamlessly with analog quadrature modulators, such as the ADL5375 family from Analog Devices, Inc. A serial peripheral interface (SPI) provides for programming and readback of many internal parameters. Full-scale output current can be programmed over a range of 10 mA to 30 mA. The AD9785/AD9787/AD9788 family is manufactured on a 0.18 μm CMOS process and operates from 1.8 V and 3.3 V supplies. It is enclosed in a 100-lead TQFP package.
Product Highlights
- Low noise and intermodulation distortion (IMD) enable high quality synthesis of wideband signals from baseband to high intermediate frequencies.
- Proprietary DAC output switching technique enhances dynamic performance.
- CMOS data input interface with adjustable setup and hold.
- Low power complex 32-bit numerically controlled oscillators (NCOs).
Applications
- Wireless infrastructure
W-CDMA, CDMA2000, TD-SCDMA, WiMAX, GSM - Digital high or low IF synthesis
- Transmit diversity
- Wideband communications
LMDS/MMDS, point-to-point
Documentation
Data Sheet 1
User Guide 1
Application Note 1
Solutions Bulletin & Brochure 1
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.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD9785BSVZ | 100-Lead TQFP (14mm x 14mm w/ EP) | ||
| AD9785BSVZRL | 100-Lead TQFP (14mm x 14mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Mar 7, 2012 - 11_0074 Addition of ASE, Shanghai as an Alternative Assembly Source for Select LQFP and TQFP-EP Packages |
||
| AD9785BSVZ | PRODUCTION | |
| AD9785BSVZRL | PRODUCTION | |
|
Jun 16, 2009 - 09_0027 Conversion to Laser Mark for the LQFP Packages (Single Grades) |
||
| AD9785BSVZ | PRODUCTION | |
| AD9785BSVZRL | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Evaluation Software 1
ACE Evaluation Software
Run this executable to install ACE on your computer for product evaluation.
Can't find the software or driver you need?
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Clock Distribution Devices 3 | ||
| AD9513 | RECOMMENDED FOR NEW DESIGNS | 800 MHz Clock Distribution IC, Dividers, Delay Adjust, Three Outputs |
| AD9514 | RECOMMENDED FOR NEW DESIGNS | 1.6 GHz Clock Distribution IC, Dividers, Delay Adjust, Three Outputs |
| AD9515 | RECOMMENDED FOR NEW DESIGNS | 1.6 GHz Clock Distribution IC, Dividers, Delay Adjust, Two Outputs |
| Clock Generation Devices 3 | ||
| AD9510 | RECOMMENDED FOR NEW DESIGNS | 1.2 GHz Clock Distribution IC, PLL Core, Dividers, Delay Adjust, Eight Outputs |
| AD9511 | RECOMMENDED FOR NEW DESIGNS | 1.2 GHz Clock Distribution IC, PLL Core, Dividers, Delay Adjust, Five Outputs |
| AD9512 | RECOMMENDED FOR NEW DESIGNS | 1.2 GHz Clock Distribution IC, Two 1.6 GHz Inputs, Dividers, Delay Adjust, Five Outputs |
| High Voltage Op Amps ≥12V 1 | ||
| ADA4899-1 | PRODUCTION | Unity-Gain Stable, Ultralow Distortion, 1 nV/√Hz Voltage Noise, High Speed Op Amp |
| I/Q Demodulators with Integrated LO 1 | ||
| ADL5385 | RECOMMENDED FOR NEW DESIGNS | 30 MHz TO 2200 MHz Quadrature Modulator |
| I/Q Modulators 11 | ||
| ADRF6701 | Obsolete | 400 MHz to 1250 MHz Quadrature Modulator with 750 MHz to 1150 MHz Fractional-N PLL and Integrated VCO |
| AD8345 | PRODUCTION | 140 MHz to 1000 MHz Quadrature Modulator |
| AD8346 | PRODUCTION | 2.5 GHz Direct Conversion Quadrature Modulator |
| ADL5370 | PRODUCTION | 300 MHz TO 1000 MHz Quadrature Modulator |
| ADL5371 | RECOMMENDED FOR NEW DESIGNS | 500 MHz TO 1500 MHz Quadrature Modulator |
| ADL5372 | PRODUCTION | 1500 MHz TO 2500 MHz Quadrature Modulator |
| ADL5373 | PRODUCTION | 2300 MHz TO 3000 MHz Quadrature Modulator |
| ADL5374 | Obsolete | 3000 MHz TO 4000 MHz Quadrature Modulator |
| ADL5375 | PRODUCTION | 400 MHz TO 6 GHz Broadband Quadrature Modulator |
| AD8349 | PRODUCTION | 700 MHz TO 2.7 GHz Direct Up-Conversion Quadrature Modulator |
| ADL5386 | Obsolete | 50 MHz to 2200 MHz Quadrature Modulator with Integrated Detector and VVA |
| I/Q Modulators with Integrated LO 3 | ||
| ADRF6702 | Obsolete | 1200 MHz to 2400 MHz Quadrature Modulator with 1550 MHz to 2150 MHz Fractional-N PLL & Integrated VCO |
| ADRF6703 | Obsolete | 1550 MHz to 2650 MHz Quadrature Modulator with 2100 MHz to 2600 MHz Fractional-N PLL & Integrated VCO |
| ADRF6704 | Obsolete | 2050 MHz to 3000 MHz Quadrature Modulator with 2500 MHz to 2900 MHz Fractional-N PLL & Integrated VCO |
| Low Noise Op Amps (≤ 10nV/√Hz) 1 | ||
| ADA4897-1 | RECOMMENDED FOR NEW DESIGNS | 1 nV/√Hz, Low Power, Rail-to-Rail Output Amplifiers |
| Precision Op Amps (Vos ≤1mV & TCVos ≤2uV/C) 1 | ||
| AD8021 | PRODUCTION | Low Noise, High Speed Amplifier for 16-Bit Systems |
Tools & Simulations
IBIS Model 1
Evaluation Kits
High Speed Controller Board
Resources
Software
AD9785 Evaluation Board