产品详细信息

Resolution (Bits) 12 Number of DAC channels (#) 8 Interface type SPI Output type Buffered Voltage Settling time (µs) 15 Features On-chip Offset and Gain Calibration, SDO Reference type Ext Architecture String Rating Catalog Output range (Max) (mA/V) 33 Output range (Min) (mA/V) -16.5 Operating temperature range (C) -40 to 85
Resolution (Bits) 12 Number of DAC channels (#) 8 Interface type SPI Output type Buffered Voltage Settling time (µs) 15 Features On-chip Offset and Gain Calibration, SDO Reference type Ext Architecture String Rating Catalog Output range (Max) (mA/V) 33 Output range (Min) (mA/V) -16.5 Operating temperature range (C) -40 to 85
TQFP (PAG) 64 144 mm² 12 x 12 VQFN (RGZ) 48 49 mm² 7 x 7
  • Bipolar Output: ±2V to ±16.5V
  • Unipolar Output: 0V to +33V
  • 12-Bit Resolution
  • Low Power: 14.4mW/Ch (Bipolar Supply)
  • Relative Accuracy: 1 LSB Max
  • Low Zero/Full-Scale Error: ±1 LSB Max
  • Flexible System Calibration
  • Low Glitch: 4nV-s
  • Settling Time: 15µs
  • Channel Monitor Output
  • Programmable Gain: x4/x6
  • Programmable Offset
  • SPI: Up to 50MHz, 1.8V/3V/5V Logic
  • Schmitt Trigger Inputs
  • Daisy-Chain with Sleep Mode Enhancement
  • Packages: QFN-48 (7x7mm), TQFP-64 (10x10mm)
  • APPLICATIONS
    • Automatic Test Equipment
    • PLC and Industrial Process Control
    • Communications
  • Bipolar Output: ±2V to ±16.5V
  • Unipolar Output: 0V to +33V
  • 12-Bit Resolution
  • Low Power: 14.4mW/Ch (Bipolar Supply)
  • Relative Accuracy: 1 LSB Max
  • Low Zero/Full-Scale Error: ±1 LSB Max
  • Flexible System Calibration
  • Low Glitch: 4nV-s
  • Settling Time: 15µs
  • Channel Monitor Output
  • Programmable Gain: x4/x6
  • Programmable Offset
  • SPI: Up to 50MHz, 1.8V/3V/5V Logic
  • Schmitt Trigger Inputs
  • Daisy-Chain with Sleep Mode Enhancement
  • Packages: QFN-48 (7x7mm), TQFP-64 (10x10mm)
  • APPLICATIONS
    • Automatic Test Equipment
    • PLC and Industrial Process Control
    • Communications

The DAC7718 is a low-power, octal, 12-bit digital-to-analog converter (DAC). With a 5V reference, the output can either be a bipolar ±15V voltage when operating from dual ±15.5V (or higher) power supplies, or a unipolar 0V to +30V voltage when operating from a +30.5V (or higher) power supply. With a 5.5V reference, the output can either be a bipolar ±16.5V voltage when operating from dual ±17V (or higher) power supplies, or a unipolar 0V to +33V voltage when operating from a +33.5V (or higher) power supply. This DAC provides low-power operation, good linearity, and low glitch over the specified temperature range of –40°C to +105°C. This device is trimmed in manufacturing and has very low zero-code and gain error. In addition, system level calibration can be performed over the entire signal chain. The output range can be offset by using the DAC offset register.

The DAC7718 features a standard, high-speed serial peripheral interface (SPI) that operates at up to 50MHz and is 1.8V, 3V, and 5V logic compatible, to communicate with a DSP or microprocessor. The input data of the device are double-buffered. An asynchronous load input (LDAC) transfers data from the DAC data register to the DAC latch. The asynchronous CLR input sets the output of all eight DACs to AGND. The VMON pin is a monitor output that connects to the individual analog outputs, the offset DAC, the reference buffer outputs, and two external inputs through a multiplexer (mux).

The DAC7718 is pin-to-pin and function-compatible with the DAC8718 (16-bit) and the DAC8218 (14-bit).

The DAC7718 is a low-power, octal, 12-bit digital-to-analog converter (DAC). With a 5V reference, the output can either be a bipolar ±15V voltage when operating from dual ±15.5V (or higher) power supplies, or a unipolar 0V to +30V voltage when operating from a +30.5V (or higher) power supply. With a 5.5V reference, the output can either be a bipolar ±16.5V voltage when operating from dual ±17V (or higher) power supplies, or a unipolar 0V to +33V voltage when operating from a +33.5V (or higher) power supply. This DAC provides low-power operation, good linearity, and low glitch over the specified temperature range of –40°C to +105°C. This device is trimmed in manufacturing and has very low zero-code and gain error. In addition, system level calibration can be performed over the entire signal chain. The output range can be offset by using the DAC offset register.

The DAC7718 features a standard, high-speed serial peripheral interface (SPI) that operates at up to 50MHz and is 1.8V, 3V, and 5V logic compatible, to communicate with a DSP or microprocessor. The input data of the device are double-buffered. An asynchronous load input (LDAC) transfers data from the DAC data register to the DAC latch. The asynchronous CLR input sets the output of all eight DACs to AGND. The VMON pin is a monitor output that connects to the individual analog outputs, the offset DAC, the reference buffer outputs, and two external inputs through a multiplexer (mux).

The DAC7718 is pin-to-pin and function-compatible with the DAC8718 (16-bit) and the DAC8218 (14-bit).

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技术文档

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类型 标题 下载最新的英文版本 日期
* 数据表 Octal, 12-Bit, Low-Power, +/-15V Output, Serial Input D/A Converter 数据表 (Rev. A) 2009年 12月 15日
模拟设计期刊 模拟应用期刊 2011 第三季度 下载英文版本 2011年 12月 2日
模拟设计期刊 隔离式 RS-485 收发器可支持 DMX512 舞台照明和特效应用 下载英文版本 2011年 12月 2日
模拟设计期刊 Analog Applications Journal 3Q 2011 2011年 9月 1日
用户指南 DAC7718EVM User Guide (Rev. A) 2011年 5月 11日
模拟设计期刊 IBIS 模型(第 2 部分):决定 IBIS 模型 的全面质量 下载英文版本 2011年 5月 11日
应用手册 所选封装材料的热学和电学性质 2008年 10月 16日
应用手册 高速数据转换 下载英文版本 2008年 10月 16日

设计与开发

有关其他条款或所需资源,请点击下面的任何链接来查看详情页面。

评估板

DAC7718EVM — DAC7718 评估模块

DACxx18EVM 具有 DAC7718、DAC8218 或 DAC8718 数模转换器。该 EVM 提供简单快捷的方法来评估这款高分辨率串行输入模数转换器 (DAC) 的功能和性能。默认情况下,DACxx18EVM 被设计为在双极输出范围内工作,但是也可以通过正确配置两个跳线将它配置为在单极输出范围内工作。EVM 提供串行接口头以轻松连接所有主机微处理器或 TI DSP 基本系统。已安装的精密电压基准 +5VDC 和 +2.5VDC 可通过板载跳线进行选择。REF5050(+5.0VDC 电源)和 REF5025 (+2.5VDC) 与具有各种参考值的 REF50xx 系列引脚兼容。

现货
数量限制: 2
评估板

DAC8718EVM — DAC8718 评估模块

The DACxx18EVM features the DAC7718, DAC8218, or DAC8718 digital to analog converter. The EVM provides a quick and easy way to evaluate the functionality and performance of this high resolution serial input Digital to Analog Converter (DAC). The DACxx18EVM is designed to work by default for a (...)

现货
数量限制: 2
软件编程工具

DXP — DXP DAC 操作器程序

DAC Exerciser Program (DXP)is a software tool from Texas Instruments for evaluating DACs without the requirements of expensive pattern generators or writing complex software. When used with a Texas Instruments DAC EVM and a modular motherboard, it allows for simple and easy digital signal generation (...)
仿真模型

DAC7718 IBIS Model

SBAM088.ZIP (82 KB) - IBIS Model
仿真工具

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

PSpice® for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence® 的模拟分析引擎。PSpice for TI 可免费使用,包括业内超大的模型库之一,涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助 PSpice for TI 的设计和仿真环境及其内置的模型库,您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案,然后再进行布局和制造,可缩短产品上市时间并降低开发成本。 

在 PSpice for TI 设计和仿真工具中,您可以搜索 TI 器件、了解产品系列、打开测试台并对您的设计进行仿真,从而进一步分析选定的器件。您还可对多个 TI 器件进行联合仿真,以更好地展现您的系统。

除了一个完整的预加载模型库之外,您还可以在 PSPICE-FOR-TI 工具中轻松访问 TI 器件的全新技术资料。在您确认找到适合您应用的器件后,可访问 TI store 购买产品。 

借助 PSpice for TI,您可使用合适的工具来满足您在整个设计周期(从电路探索到设计开发和验证)的仿真需求。免费获取、轻松入门。立即下载 PSpice 设计和仿真套件,开始您的设计。

入门

  1. 申请使用 PSPICE-FOR-TI 仿真器
  2. 下载并安装
  3. 观看有关仿真入门的培训
仿真工具

TINA-TI — 基于 SPICE 的模拟仿真程序

TINA-TI 提供了 SPICE 所有的传统直流、瞬态和频域分析以及更多。TINA 具有广泛的后处理功能,允许您按照希望的方式设置结果的格式。虚拟仪器允许您选择输入波形、探针电路节点电压和波形。TINA 的原理图捕获非常直观 - 真正的“快速入门”。

TINA-TI 安装需要大约 500MB。直接安装,如果想卸载也很容易。我们相信您肯定会爱不释手。

TINA 是德州仪器 (TI) 专有的 DesignSoft 产品。该免费版本具有完整的功能,但不支持完整版 TINA 所提供的某些其他功能。

如需获取可用 TINA-TI 模型的完整列表,请参阅:SpiceRack - 完整列表 

需要 HSpice 模型来帮助您设计?我们的 HSpice 模型系列可在此处找到。

计算工具

ANALOG-ENGINEER-CALC — 模拟工程师计算器

模拟工程师计算器旨在加快模拟电路设计工程师经常使用的许多重复性计算。该基于 PC 的工具提供图形界面,其中显示各种常见计算的列表(从使用反馈电阻器设置运算放大器增益到为稳定模数转换器 (ADC) 驱动器缓冲器电路选择合适的电路设计元件)。除了可用作单独的工具之外,该计算器还能够很好地与模拟工程师口袋参考书中所述的概念配合使用。
封装 引脚 下载
TQFP (PAG) 64 了解详情
VQFN (RGZ) 48 了解详情

订购与质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/FIT 估算
  • 材料成分
  • 认证摘要
  • 持续可靠性监测

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