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DAC7678 具有 2.5V 内部参考的 12 位、8 通道、超低短时脉冲波形干扰、电压输出、2 线接口 DAC

DAC7678 说明

The DAC7678 is a low-power, voltage-output, eight-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 initial accuracy is ±1mV 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, two-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 on at either zero-scale or midscale until a valid code is written to the device.



	DAC5578	DAC6578	DAC7578	DAC7678
Resolution(Bits)	8	10	12	12
DAC: Channels	8	8	8	8
Settling Time(µs)	6	6	6	6
Interface	I2C	I2C	I2C	I2C
Output Type	Voltage	Voltage	Voltage	Voltage
Output Range Min.(V or mA)	0	0V	0V	0V
Output Range Max.(V or mA)	5.5V	5.5V	5.5V	5.5V
Single/Dual Analog Supply	Single Supply	Single Supply	Single Supply	Single Supply
DNL(Max)(+/-LSB)	0.1	0.2	0.25	0.25
INL(Max)(+/-LSB)	0.25	0.5	1	1
INL (+/-)(Max)(%)	0.098	0.0489	0.0244	0.0244
Monotonicity	8	10	12	12
Power Consumption(Typ)(mW)	3.4	3.4	3.4	3.4
Architecture	String	String	String	String
Reference: Type	Ext	Ext	Ext	Int/Ext
Analog Voltage AV/DD(Min)(V)	2.7	2.7	2.7	2.7
Analog Voltage AV/DD(Max)(V)	5.5	5.5	5.5	5.5
No. of Supplies (Unipolar)	1	1	1	1
Rating	Catalog	Catalog	Catalog	Catalog
Pin/Package	16TSSOP, 24VQFN	16TSSOP, 24VQFN	16TSSOP, 24VQFN	16TSSOP, 24VQFN
Operating Temperature Range(°C)	-40 to 125	-40 to 125	-40 to 125	-40 to 125

DAC7678 特性

• Relative Accuracy: 1 LSB INL
• Glitch Energy: 0.15nV-s
• Internal Reference:
  • 2.5V Reference Voltage (disabled by default)
  • ±1mV Initial Accuracy
  • 2ppm/°C Temperature Drift (typ)
  • 25ppm/°C Temperature Drift (max)
  • 20mA Sink/Source Capability
• Power-On Reset to Zero Scale or Midscale
• Ultra-Low Power Operation: 0.15mA/Channel at 5V
• Wide Power-Supply Range: +2.7V to +5.5V
• 16-Bit Monotonic Over Temperature Range
• Settling Time: 10µs to ±0.003% Full-Scale Range (FSR)
• Two-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

DAC7678 芯片订购指南

器件	状态	温度 (oC)	封装 | 引脚	封装数量 | 封装载体	丝印标记
DAC7678SPW	PREVIEW	-40 to 125	TSSOP (PW) | 16	90	DAC7678
DAC7678SPWR	PREVIEW	-40 to 125	TSSOP (PW) | 16	2000	DAC7678
DAC7678SRGER	PREVIEW	-40 to 125	TSSOP (PW) | 16	3000	DAC7678
DAC7678SRGET	PREVIEW	-40 to 125	TSSOP (PW) | 16	250	DAC7678

DAC7678 应用技术支持与电子电路设计开发资源下载

1. DAC7678 数据资料 dataSheet 下载.PDF
2. TI 德州仪器仪DAC 模数转换器产品选型与价格 . xls
3. 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
4. 所选封装材料的热学和电学性质 (PDF 645 KB)
5. 高速数据转换 (PDF 1967 KB)
6. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
7. Analog-to-Digital Converter Grounding Practices Affect System Performance (PDF 56 KB)
8. Principles of Data Acquisition and Conversion (PDF 50 KB)
9. Interleaving Analog-to-Digital Converters (PDF 64 KB)
10. What Designers Should Know About Data Converter Drift (PDF 95 KB)
11. Giving Delta-Sigma Converters a Gain Boost with a Front End Analog Gain Stage (PDF 70 KB)
12. Programming Tricks for Higher Conversion Speeds Utilizing Delta Sigma Converters (PDF 105 KB)

DAC7678 工具与软件

名称	型号	公司	工具/软件类型
DAC7678 评估模块	DAC7678EVM	Texas Instruments	开发电路板/EVM
针对 Code Composer Studio 的 DCPFREETOOL 软件插件	DCPFREETOOL	Texas Instruments	实用程序/插件
MDACBufferPro Design Utility for Multiplying Digital to Analog Converter Design	MDACBUFFERPRO	Texas Instruments	应用软件