AD768 16-Bit, 30 MSPS D/A Converter

The AD768 is a current-output DAC with a nominal full-scale output current of 20mA and a 1k(ohm) output impedance. Differential current outputs are provided to support single-ended or differential applications. The current outputs may be tied directly to an output, or fed to the summing junction of a high speed amplifier to provide a buffered voltage output. Also, the differential outputs may be interfaced to a transformer or differential amplifier. The on-chip reference and control amplifier are configured for maximum accuracy and flexibility. The AD768 can be driven by the on-chip reference or by a variety of external reference voltages based on the selection of an external resistor. An external capacitor allows the user to optimally trade off reference bandwidth and noise performance. The AD768 operates on ±5V supplies, typically consuming 465 mW of power. The AD768 is available in a 28-pin SOIC package and is specified for operation over the industrial temperature range.

The AD768 is a 16-bit, high speed digital-to-analog converter (DAC) that offers exceptional ac and dc performance. The AD768 is manufactured on ADI's Advanced Bipolar CMOS (ABCMOS) process, combining the speed of bipolar transistors, the accuracy of laser-trimmable thin film resistors, and the efficiency of CMOS logic. A segmented current source architecture is combined with proprietary switching technique to reduce glitch energy and maximize dynamic accuracy. Edge triggered input latches and a temperature compensated bandgap reference have been integrated to provide a complete monolithic DAC solution.

The AD768 is a current-output DAC with a nominal full-scale output current of 20mA and a 1k(ohm) output impedance. Differential current outputs are provided to support single-ended or differential applications. The current outputs may be tied directly to an output, or fed to the summing junction of a high speed amplifier to provide a buffered voltage output. Also, the differential outputs may be interfaced to a transformer or differential amplifier.

The on-chip reference and control amplifier are configured for maximum accuracy and flexibility. The AD768 can be driven by the on-chip reference or by a variety of external reference voltages based on the selection of an external resistor. An external capacitor allows the user to optimally trade off reference bandwidth and noise performance.

The AD768 operates on ±5V supplies, typically consuming 465 mW of power. The AD768 is available in a 28-pin SOIC package and is specified for operation over the industrial temperature range.

Features and Benefits
  • 30 MSPS Update Rate
  • 16-Bit Resolution
  • Linearity: 1/2 LSB DNL @14 Bits
    1 LSB INL @14 Bits
  • Fast Settling: 25 ns Full-Scale Settling to 0.025%
  • SFDR @ 1 MHz Output: 86 dBc
  • THD @ 1 MHz Output: 71 dBc
  • Low Glitch Impulse: 35 pV-s
  • Power Dissipation: 465 mW
  • On-Chip 2.5 V Reference
  • Edge-Triggered Latches
  • Multiplying Reference Capability
Digital to Analog Converters
Data Sheets
Documentnote
AD768: 16-Bit, 30 MSPS D/A Converter Data Sheet (Rev. B)PDF 334 kB
Application Notes
Documentnote
AN-932: Power Supply Sequencing (Rev. 0)PDF 95 kB
AN-912: Driving a Center-Tapped Transformer with a Balanced Current-Output DAC (Rev. 0)PDF 246 kB
AN-414: Low Cost, Low Power Devices for HDSL ApplicationsPDF 41 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD768AR Production28 ld SOIC - WideOTH 27-40 to 85C32.9826.38N
AD768ARZ Production28 ld SOIC - WideOTH 27-40 to 85C30.0424.02Y
AD768ARZ-REEL Production28 ld SOIC - WideREEL 1000-40 to 85C024.02Y
Reference Materials
AD768: 16-Bit, 30 MSPS D/A Converter Data Sheet (Rev. B) ad768
AN-932: 电源时序控制 (Rev. 0) ad7628
AN-932: Power Supply Sequencing (Rev. 0) ad7660
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-313: 充分利用高分辨率数模转换器 (Rev. 0) ad420
AN-414: Low Cost, Low Power Devices for HDSL Applications ad9221
Digital to Analog Converters ICs Solutions Bulletin ad5590