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数模转换器 (DAC)
精密 DAC (≤10 MSPS)

DAC7678

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具有 2.5V 内部参考的 12 位、八通道、超低毛刺脉冲、电压输出、双线接口 DAC

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DAC60508 正在供货 采用微型 WCSP 封装、具有精密内部基准电压的真正 12 位、8 通道、SPI、电压输出 DAC Smaller 3mm × 3mm package with integrated reference

DAC7678

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产品详情

Resolution (Bits) 12 Number of DAC channels 8 Interface type I2C Output type Buffered Voltage Output voltage range (V) 0 to 5.5 INL (max) (±LSB) 1 Settling time (µs) 7 Reference type Ext, Int Architecture String Rating Catalog Features Low glitch, Reset to Mid-Scale Sample/update rate (Msps) 0.083 Power consumption (typ) (mW) 3.4 Operating temperature range (°C) -40 to 125 Product type General-purpose DAC
Resolution (Bits) 12 Number of DAC channels 8 Interface type I2C Output type Buffered Voltage Output voltage range (V) 0 to 5.5 INL (max) (±LSB) 1 Settling time (µs) 7 Reference type Ext, Int Architecture String Rating Catalog Features Low glitch, Reset to Mid-Scale Sample/update rate (Msps) 0.083 Power consumption (typ) (mW) 3.4 Operating temperature range (°C) -40 to 125 Product type General-purpose DAC
VQFN (RGE) 24 16 mm² (4 mm × 4 mm) TSSOP (PW) 16 32 mm² (5 mm × 6.4 mm)
  • Relative Accuracy:
    • 1 LSB INL
  • Glitch Energy: 0.15nV-s
  • Internal Reference:
    • 2.5V Reference Voltage (disabled by default)
    • ±5mV Initial Accuracy (max)
    • 5ppm/°C Temperature Drift (typ)
    • 25ppm/°C Temperature Drift (max)
    • 20mA Sink/Source Capability
  • Power-On Reset to Zero Scale or Midscale
    • Devices in the TSSOP Package Reset to
      Zero Scale
    • Devices in the QFN Package Reset to Zero Scale
      or Midscale
  • Ultra-Low Power Operation: 0.13mA/Channel at 5V
    (without internal reference current)
  • Wide Power-Supply Range: +2.7V to +5.5V
  • 2-Wire Serial Interface (I2C compatible)
  • On-Chip Output Buffer Amplifier with Rail-to-Rail
    Operation
  • Temperature Range: –40°C to +125°C
  • APPLICATIONS
    • Portable Instrumentation
    • Closed-Loop Servo-Control
    • Process Control
    • Data Acquisition Systems
    • Programmable Attenuation
    • PC Peripherals

All other trademarks are the property of their respective owners
  • Relative Accuracy:
    • 1 LSB INL
  • Glitch Energy: 0.15nV-s
  • Internal Reference:
    • 2.5V Reference Voltage (disabled by default)
    • ±5mV Initial Accuracy (max)
    • 5ppm/°C Temperature Drift (typ)
    • 25ppm/°C Temperature Drift (max)
    • 20mA Sink/Source Capability
  • Power-On Reset to Zero Scale or Midscale
    • Devices in the TSSOP Package Reset to
      Zero Scale
    • Devices in the QFN Package Reset to Zero Scale
      or Midscale
  • Ultra-Low Power Operation: 0.13mA/Channel at 5V
    (without internal reference current)
  • Wide Power-Supply Range: +2.7V to +5.5V
  • 2-Wire Serial Interface (I2C compatible)
  • On-Chip Output Buffer Amplifier with Rail-to-Rail
    Operation
  • Temperature Range: –40°C to +125°C
  • APPLICATIONS
    • Portable Instrumentation
    • Closed-Loop Servo-Control
    • Process Control
    • Data Acquisition Systems
    • Programmable Attenuation
    • PC Peripherals

All other trademarks are the property of their respective owners

The DAC7678 is a low-power, voltage-output, octal channel, 12-bit digital-to-analog converter (DAC). The DAC7678 includes a 2.5V internal reference (disabled by default), giving a full-scale output voltage range of 5V. The internal reference has an initial accuracy of ±5mV and can source up to 20mA at the VREFIN/VREFOUT pin. The device is monotonic, provides very good linearity, and minimizes undesired code-to-code transient voltages (glitch).

The DAC7678 uses a versatile, 2-wire serial interface that is I2C-compatible and operates at clock rates of up to 3.4MHz. Multiple devices can share the same bus.

The DAC7678 incorporates a power-on-reset circuit that ensures the DAC output powers up to either zero-scale or mid-scale until a valid code is written to the device. These devices contain a power-down feature, accessed over the serial interface that reduces the current consumption of the device to typically 0.42µA at 5V. Power consumption (including internal reference) is typically 3.56mW at 3V, reducing to 0.68µW in power-down mode. The low power consumption, internal reference, and small footprint make this device ideal for portable, battery-operated equipment. The DAC7678 is drop-in and functionally compatible with DAC5578, DAC6578, and DAC7578. All devices are available in a 4x4 QFN-24 package and a TSSOP-16 package.

The DAC7678 is a low-power, voltage-output, octal channel, 12-bit digital-to-analog converter (DAC). The DAC7678 includes a 2.5V internal reference (disabled by default), giving a full-scale output voltage range of 5V. The internal reference has an initial accuracy of ±5mV and can source up to 20mA at the VREFIN/VREFOUT pin. The device is monotonic, provides very good linearity, and minimizes undesired code-to-code transient voltages (glitch).

The DAC7678 uses a versatile, 2-wire serial interface that is I2C-compatible and operates at clock rates of up to 3.4MHz. Multiple devices can share the same bus.

The DAC7678 incorporates a power-on-reset circuit that ensures the DAC output powers up to either zero-scale or mid-scale until a valid code is written to the device. These devices contain a power-down feature, accessed over the serial interface that reduces the current consumption of the device to typically 0.42µA at 5V. Power consumption (including internal reference) is typically 3.56mW at 3V, reducing to 0.68µW in power-down mode. The low power consumption, internal reference, and small footprint make this device ideal for portable, battery-operated equipment. The DAC7678 is drop-in and functionally compatible with DAC5578, DAC6578, and DAC7578. All devices are available in a 4x4 QFN-24 package and a TSSOP-16 package.
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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 12-Bit, Octal-Chan, Ultra-Low Glitch, Voltage Output, 2-Wire Int DAC w/2.5V Ref 数据表 (Rev. C) 2014-1-21
应用手册 A Basic Guide to I2C PDF | HTML 2022-11-8

设计与开发

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评估板

DAC7678EVM — DAC7678 评估模块

DAC7678EVM 设计用来评估 DAC7678、DAC5578、DAC6578 或 DAC7578 数模转换器。默认情况下，DAC7678EVM 安装有 DAC7678，但可采用任何一种其他引脚可兼容器件进行替换。该 EVM 使您可以轻松快捷地评估这个低功率、高分辨率、8 至 12 位系列数模转换器 (DAC) 的功能和性能。使用了双线 I?C 接口头，可以轻松连接从 DAC 至任何主机微处理器或基于 TI DSP 的系统的 SCL 和 SDA 引脚。默认情况下，DAC7678EVM 设计为使用板载外部参考，但可以适当修改以使用 DAC 内部参考（如果是 (...)

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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

DAC7678 IBIS Model

SBAM031.ZIP (61 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 (RGE) 24 Ultra Librarian
TSSOP (PW) 16 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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