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数模转换器 (DAC)
精密 DAC (≤10 MSPS)

DAC7718

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八通道、低功耗、12 位 +/-16.5V 输出串行输入数模转换器

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DAC7718

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产品详情

Resolution (Bits) 12 Number of DAC channels 8 Interface type SPI Output type Buffered Voltage Output voltage range (V) -16.5 to 16.5 INL (max) (±LSB) 1 Settling time (µs) 15 Reference type Ext Architecture String Rating Catalog Features On-chip Offset and Gain Calibration, SDO Sample/update rate (Msps) 0.066 Power consumption (typ) (mW) 115 Operating temperature range (°C) -40 to 85
Resolution (Bits) 12 Number of DAC channels 8 Interface type SPI Output type Buffered Voltage Output voltage range (V) -16.5 to 16.5 INL (max) (±LSB) 1 Settling time (µs) 15 Reference type Ext Architecture String Rating Catalog Features On-chip Offset and Gain Calibration, SDO Sample/update rate (Msps) 0.066 Power consumption (typ) (mW) 115 Operating temperature range (°C) -40 to 85
VQFN (RGZ) 48 49 mm² (7 mm × 7 mm) TQFP (PAG) 64 144 mm² (12 mm × 12 mm)
  • 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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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 Octal, 12-Bit, Low-Power, High-Voltage Output, Serial Input D/A Converter 数据表 (Rev. A) 2009-12-15
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 英语版 2011-12-2
模拟设计期刊 模拟应用期刊 2011 第三季度 英语版 2011-12-2
模拟设计期刊 IBIS 模型（第 2 部分）：决定 IBIS 模型 的全面质量 英语版 2011-5-11

设计与开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

评估板

DAC7718EVM — DAC7718 评估模块

DACxx18EVM 具有 DAC7718、DAC8218 或 DAC8718 数模转换器。该 EVM 提供了一种快速简便的方法，用于评估此高分辨率串行输入数模转换器 (DAC) 的功能和性能。默认情况下，DACxx18EVM 适用于双极输出范围，但也可以通过正确配置两个跳线，将其配置为适用于单极输出范围。EVM 提供串行接口接头，可轻松连接到任何主机微处理器或 TI DSP 基础系统。可通过板载跳线选择已安装的 +5VDC 和 +2.5VDC 精密基准电压。REF5050（+5.0VDC 源）和 REF5025 (+2.5VDC) 与 REF50xx 系列引脚兼容，从而支持各种基准值。

用户指南: PDF
支持的产品和硬件
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评估板

DAC8718EVM — DAC8718 评估模块

DACxx18EVM 具有 DAC7718、DAC8218 或 DAC8718 数模转换器。该 EVM 提供了一种快速简便的方法，用于评估此高分辨率串行输入数模转换器 (DAC) 的功能和性能。默认情况下，DACxx18EVM 适用于双极输出范围，但也可以通过正确配置两个跳线，将其配置为适用于单极输出范围。EVM 提供串行接口接头，可轻松连接到任何主机微处理器或 TI DSP 基础系统。可通过板载跳线选择已安装的 +5VDC 和 +2.5VDC 精密基准电压。REF5050（+5.0VDC 源）和 REF5025 (+2.5VDC) 与 REF50xx 系列引脚兼容，从而支持各种基准值。

用户指南: PDF
支持的产品和硬件
有库存
限制：
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支持软件

DXP — DXP EVM GUI

DAC Exerciser Program (DXP) 是德州仪器 (TI) 的软件工具，无需昂贵的信号发生器即可评估 DAC，也无需编写复杂的软件。与德州仪器 (TI) DAC EVM 和模块化主板配合使用时，它可以轻松简单地生成 DAC 的数字信号，以生成用于测量和评估的模拟输出。

支持的产品和硬件
仿真模型

DAC7718 IBIS Model

SBAM088.ZIP (82 KB) - IBIS 模型
支持的产品和硬件
设计工具

ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.

The ADC-TO-VREF-SELECT tool enables the pairing of TI analog-to-digital converters (ADCs) and series voltage references. Users can select an ADC device and the desired reference voltage, and the tool will list up to two voltage reference recommendations.
支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
VQFN (RGZ) 48 Ultra Librarian
TQFP (PAG) 64 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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