Product details

Resolution (Bits) 16 Number of DAC channels (#) 1 Interface type Parallel LVDS Sample/update rate (MSPS) 1000 Features Ultra High Speed Rating Catalog Interpolation 1x Power consumption (Typ) (mW) 650 SFDR (dB) 81 Architecture Current Sink Operating temperature range (C) -40 to 85 Reference type Int
Resolution (Bits) 16 Number of DAC channels (#) 1 Interface type Parallel LVDS Sample/update rate (MSPS) 1000 Features Ultra High Speed Rating Catalog Interpolation 1x Power consumption (Typ) (mW) 650 SFDR (dB) 81 Architecture Current Sink Operating temperature range (C) -40 to 85 Reference type Int
VQFN (RGC) 64 81 mm² 9 x 9
  • 16-Bit Digital-to-Analog Converter (DAC)
  • 1.0 GSPS Update Rate
  • 16-Bit Wideband Input LVDS Data Bus
    • 8 Sample Input FIFO
    • On-Chip Delay Lock Loop
  • High Performance
    • 73 dBc ACLR WCDMA TM1 at 180 MHz
  • On Chip 1.2 V Reference
  • Differential Scalable Output: 2 to 20 mA
  • Package: 64-Pin 9 × 9 mm QFN
  • 16-Bit Digital-to-Analog Converter (DAC)
  • 1.0 GSPS Update Rate
  • 16-Bit Wideband Input LVDS Data Bus
    • 8 Sample Input FIFO
    • On-Chip Delay Lock Loop
  • High Performance
    • 73 dBc ACLR WCDMA TM1 at 180 MHz
  • On Chip 1.2 V Reference
  • Differential Scalable Output: 2 to 20 mA
  • Package: 64-Pin 9 × 9 mm QFN

The DAC5681 is a 16-bit 1.0 GSPS digital-to-analog converter (DAC) with wideband LVDS data input and internal voltage reference. The DAC5681 offers superior linearity and noise performance.

The DAC5681 integrates a wideband LVDS port with on-chip termination, providing full 1.0 GSPS data transfer into the DAC and lower EMI than traditional CMOS data interfaces. An on-chip delay lock loop (DLL) simplifies LVDS interfacing by providing skew control for the LVDS input data clock.

The current-steering architecture of the DAC5681 consists of a segmented array of current sinking switches directing up to 20mA of full-scale current to complementary output nodes. An accurate on-chip voltage reference is temperature-compensated and delivers a stable 1.2-V reference voltage. Optionally, an external reference may be used.

The DAC5681 is characterized for operation over the industrial temperature range of –40°C to 85°C and is available in a 64-pin QFN package. The device is pin upgradeable to the other members of the family: the DAC5681Z and DAC5682Z. The single-channel DAC5681Z and dual-channel DAC5682Z both provide optional 2x/4x interpolation and a clock multiplying PLL.

The DAC5681 is a 16-bit 1.0 GSPS digital-to-analog converter (DAC) with wideband LVDS data input and internal voltage reference. The DAC5681 offers superior linearity and noise performance.

The DAC5681 integrates a wideband LVDS port with on-chip termination, providing full 1.0 GSPS data transfer into the DAC and lower EMI than traditional CMOS data interfaces. An on-chip delay lock loop (DLL) simplifies LVDS interfacing by providing skew control for the LVDS input data clock.

The current-steering architecture of the DAC5681 consists of a segmented array of current sinking switches directing up to 20mA of full-scale current to complementary output nodes. An accurate on-chip voltage reference is temperature-compensated and delivers a stable 1.2-V reference voltage. Optionally, an external reference may be used.

The DAC5681 is characterized for operation over the industrial temperature range of –40°C to 85°C and is available in a 64-pin QFN package. The device is pin upgradeable to the other members of the family: the DAC5681Z and DAC5682Z. The single-channel DAC5681Z and dual-channel DAC5682Z both provide optional 2x/4x interpolation and a clock multiplying PLL.

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Technical documentation

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Type Title Date
* Data sheet 16-bit 1.0 GSPS Digital-To-Analog Converter (DAC) . datasheet (Rev. C) 06 Aug 2012
Analog Design Journal Q3 2009 Issue Analog Applications Journal 24 Sep 2018
Application note High Speed, Digital-to-Analog Converters Basics (Rev. A) 23 Oct 2012
User guide TSW1400 Pattern Generators 03 May 2012
More literature TI and Altera Ease Design Process with Compatible Evaluation Tools 25 Apr 2011
More literature TI and Xilinx Ease Design Process with Compatible Evaluation Tools 25 Apr 2011
Analog Design Journal Interfacing op amps to high-speed DACs, Part 1: Current-sinking DACs 14 Jul 2009
Application note Passive Terminations for Current Output DACs 10 Nov 2008
Application note CDCE72010 as a Clocking Solution for High-Speed Analog-to-Digital Converters 08 Jun 2008
Application note Phase Noise Performance and Jitter Cleaning Ability of CDCE72010 02 Jun 2008

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

DAC5681EVM — DAC5681 16-Bit, 1.0-GSPS Digital-to-Analog Converter Evaluation Module

The DAC5681EVM is a circuit board that allows designers to evaluate the performance of Texas Instruments' single-channel 16-bit 1.0 GSPS digital-to-analog converter (DAC) featuring a fll 1GSPS DDR LVDS interface. The EVM provides a flexible environment to test the DAC5681 under a variety of (...)

User guide: PDF
Not available on TI.com
Interface adapter

FMC-DAC-ADAPTER — High Speed DAC to FMC (Xilinx) Header Adapter Card

The FMC-DAC-Adapter passive interconnect board enables the output of TI’s LVDS input high speed DACs to be directly connected to a standard FMC interconnect header, a typical input on the latest Xilinx FPGA EVMs. This enables users of TI’s high speed DAC EVMs to directly interface to Xilinx FPGA’s (...)
Not available on TI.com
Support software

DATACONVERTERPRO-SW — High-speed data converter pro software

This high-speed data converter pro GUI is a PC (Windows® XP/7/10 compatible) program designed to aid in evaluation of most TI high-speed data converter and analog front-end (AFE) platforms. Designed to support the entire TSW14xxx series of data-capture and pattern-generation cards, (...)
Simulation model

DAC5681, DAC5681Z, DAC5682Z IBIS Model (Rev. A)

SLLC320A.ZIP (7 KB) - IBIS Model
Calculation tool

DAC5682 LPF Calculator

SLAC169.ZIP (33 KB)
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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VQFN (RGC) 64 View options

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