AD9777 16-Bit 160 MSPS 2x/4x/8x Interpolating Dual TxDAC+® D/A Converter

The AD9777 is the 16-bit member of a new pin-compatible family of high-speed dual Interpolating TxDAC+® converters with a maximum input data rate of 160 MSPS (no interpolation) and maximum DAC update rate of 400 MSPS (8x interpolation). They feature a selectable interpolation rate (2x/4x/8x) and a complex modulator that can mix at Fs/2, Fs/4 or Fs/8. All configuration is accomplished through an easy to use 3- or 4-wire SPI interface. When used with an external quadrature modulator (such as the AD8345/AD8346/AD8349) the AD977X can be used implement a more traditional baseband I/Q architecture or an image reject upconversion architecture by using its internal complex (I&Q) mixer. The latter architecture may be well suited for those applications demanding high modulation accuracy (i.e. 64 QAM) that digital modulation inherently provides. This offers the added benefit of suppressing the image inherent in an analog mixing operation, consequently reducing the number of filtering stages, and therefore the cost of the hardware required to achieve 3G and broadband spectral emission specifications. User-accessible Gain and Offset correction is accessed through the SPI port and improves sideband suppression and LO feedthrough, respectively. A direct IF mode allows synthesis of intermediate frequencies (IFs) above 70 MHz. TxDAC+ is a registered trademark of Analog Devices, Inc. Applications Communications Analog quadrature modulation architecture 3G, multicarrier GSM, TDMA, CDMA systems Broadband wireless, point-to-point microwave radios Instrumentation/ATE

The AD9777 is the 16-bit member of a new pin-compatible family of high-speed dual Interpolating TxDAC+® converters with a maximum input data rate of 160 MSPS (no interpolation) and maximum DAC update rate of 400 MSPS (8x interpolation). They feature a selectable interpolation rate (2x/4x/8x) and a complex modulator that can mix at Fs/2, Fs/4 or Fs/8. All configuration is accomplished through an easy to use 3- or 4-wire SPI interface.

When used with an external quadrature modulator (such as the AD8345/AD8346/AD8349) the AD977X can be used implement a more traditional baseband I/Q architecture or an image reject upconversion architecture by using its internal complex (I&Q) mixer. The latter architecture may be well suited for those applications demanding high modulation accuracy (i.e. 64 QAM) that digital modulation inherently provides. This offers the added benefit of suppressing the image inherent in an analog mixing operation, consequently reducing the number of filtering stages, and therefore the cost of the hardware required to achieve 3G and broadband spectral emission specifications. User-accessible Gain and Offset correction is accessed through the SPI port and improves sideband suppression and LO feedthrough, respectively. A direct IF mode allows synthesis of intermediate frequencies (IFs) above 70 MHz.

TxDAC+ is a registered trademark of Analog Devices, Inc.

Applications
  • Communications
  • Analog quadrature modulation architecture
  • 3G, multicarrier GSM, TDMA, CDMA systems
  • Broadband wireless, point-to-point microwave radios
  • Instrumentation/ATE
Features and Benefits
  • 16-bit resolution, 160 MSPS/400 MSPS input/output data rate
  • Selectable 2×/4×/8× interpolating filter
  • Programmable channel gain and offset adjustment
  • fS/4, fS/8 digital quadrature modulation capability
  • Direct IF transmission mode for 70 MHz + IFs
  • Enables image rejection architecture
  • Fully compatible SPI® port
  • Excellent ac performance SFDR −73 dBc @ 2 MHz to 35 MHz WCDMA ACPR 71 dB @ IF = 19.2 MHz
  • Internal PLL clock multiplier
  • Selectable internal clock divider
  • Versatile clock input Differential/single-ended sine wave or TTL/CMOS/LVPECL compatible
  • Please see data sheet for additional features
Digital to Analog Converters
AD9777 IBIS Models
Data Sheets
Documentnote
AD9777: 16-Bit 160 MSPS 2x/4x/8x Interpolating Dual TxDAC+® D/A Converter Data Sheet (Rev. C)PDF 1770 kB
Application Notes
Documentnote
AN-237: Choosing DACs for Direct Digital SynthesisPDF 1156 kB
AN-595: Understanding Pin Compatibility in the TxDAC® Line of High Speed D/A Converters (Rev. 0)PDF 36 kB
AN-748: Set-Up and Hold Measurements in High Speed CMOS Input DACs (Rev. 0)PDF 812 kB
AN-642: Coupling a Single-Ended Clock Source to the Differential Clock Input of Third-Generation TxDAC® and TxDAC+® Products (Rev. 0)PDF 479 kB
AN-808: Multicarrier CDMA2000 Feasibility (Rev. 0)PDF 1535 kB
AN-912: Driving a Center-Tapped Transformer with a Balanced Current-Output DAC (Rev. 0)PDF 246 kB
AN-320B: CMOS Multiplying DACs and Op Amps Combine to Build Programmable Gain Amplifiers, Part 2PDF 989 kB
AN-320A: CMOS Multiplying DACs and Op Amps Combine to Build Programmable Gain Amplifier, Part 1PDF 1295 kB
AN-640: Synchronizing Multiple AD9777s Using DATACLK Input Mode (Rev. 0)PDF 0
AN-137: A Digitally Programmable Gain and Attenuation Amplifier DesignPDF 52 kB
AN-302: Exploit Digital Advantages in an SSB ReceiverPDF 417 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD9777BSVZ Production80 ld TQFP with exposed padOTH 119-40 to 85C40.4834.41Y
AD9777BSVZRL Production80 ld TQFP with exposed padREEL 1000-40 to 85C034.41Y
Reference Materials
AD9777: 16-Bit 160 MSPS 2x/4x/8x Interpolating Dual TxDAC+® D/A Converter Data Sheet (Rev. C) ad9777
AD9760AR 3V ad9760
AN-808: CDMA2000多载波系统可行性研究 (Rev. 0) adl5330
AN-237: Choosing DACs for Direct Digital Synthesis ad9856
AN-595: Understanding Pin Compatibility in the TxDAC® Line of High Speed D/A Converters (Rev. 0) ad9760
AN-748: Set-Up and Hold Measurements in High Speed CMOS Input DACs (Rev. 0) ad9777
AN-642: Coupling a Single-Ended Clock Source to the Differential Clock Input of Third-Generation TxDAC® and TxDAC+® Products (Re ad9751
AN-237: 放大器直接数字频率合成的DAC选型器应用漫谈 (Rev. 0) ad9540
AN-642: 将单端时钟源耦合至第三代TxDAC®和TxDAC+®产品的差分时钟输入端 (Rev. 0) ad9751
AN-808: Multicarrier CDMA2000 Feasibility (Rev. 0) ad9863
AN-912: 用平衡电流输出DAC驱动中心抽头变压器[中文版] (Rev. 0) ad7524
AN-912: Driving a Center-Tapped Transformer with a Balanced Current-Output DAC (Rev. 0) ad7524
AN-748: 高速CMOS输入DAC中的建立和保持时间测量 (Rev. 0) ad9777
AN-320B: CMOS Multiplying DACs and Op Amps Combine to Build Programmable Gain Amplifiers, Part 2 dac8043
AN-320A: CMOS Multiplying DACs and Op Amps Combine to Build Programmable Gain Amplifier, Part 1 ad7524
AN-640: Synchronizing Multiple AD9777s Using DATACLK Input Mode (Rev. 0) ad9777
AN-595: 了解TxDAC®系列高速DAC的引脚兼容性[中文版] (Rev. 0) ad9760
AN-137: A Digitally Programmable Gain and Attenuation Amplifier Design ad7524
AN-302: Exploit Digital Advantages in an SSB Receiver ad6600
Digital to Analog Converters ICs Solutions Bulletin ad5590
Products 产品服务
Manufacturers 生产厂家
Sales 联系购买
©1993 - 2024 BDTIC