DAC8218

更新时间： 2024-11-28 06:52:15

品牌	Logo	应用领域
德州仪器 - TI		转换器
页数	文件大小	规格书
60页	1958K
描述
Octal, 14-Bit, Low-Power, High-Voltage Output, Serial Input DIGITAL-TO-ANALOG CONVERTER

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DAC8218 数据手册

DAC8218

www.ti.com

SBAS460A –MAY 2009–REVISED DECEMBER 2009

Octal, 14-Bit, Low-Power, High-Voltage Output, Serial Input

DIGITAL-TO-ANALOG CONVERTER

Check for Samples: DAC8218

FEATURES

DESCRIPTION

2345

•

Bipolar Output: ±2V to ±16.5V

Unipolar Output: 0V to +33V

14-Bit Resolution

The DAC8218 is

digital-to-analog converter (DAC). With

low-power, octal, 14-bit

•

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 to achieve ±1 LSB

bipolar zero/full-scale error with bipolar supplies, or

±1 LSB zero code/full-scale error with a unipolar

supply, over the entire signal chain. The output range

can be offset by using the DAC offset register.

•

Low Power: 14.4mW/Ch (Bipolar Supply)

Relative Accuracy: 1 LSB Max

Low Zero/Full-Scale Error

–

Before User Calibration: ±2.5 LSB Max

After User Calibration: ±1 LSB

•

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

The DAC8218 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 V_MONpin 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).

Daisy-Chain with Sleep Mode Enhancement

Packages: QFN-48 (7x7mm), TQFP-64

(10x10mm)

APPLICATIONS

•

Automatic Test Equipment

PLC and Industrial Process Control

Communications

IOV_DD

DGND

DV_DD

AV_DD

AV_SS

REF-A

Analog Monitor

DAC8218

V_OUT-0

The DAC8218 is pin-to-pin and function-compatible

with the DAC8718 (16-bit) and the DAC7718 (12-bit).

V_OUT-7

AIN-0

AIN-1

Ref Buffer A

Ref Buffer B

OFFSET-B

V_MON

Reference

Buffer A

OFFSET

DAC A

WAKEUP

SCLK

Command

Registers

To DAC-0, DAC-1,

DAC-2, DAC-3

(When Correction Engine Disabled)

SDI

OFFSET-A

V_OUT-0

SDO

DAC-0

Input Data

Correction

Engine

DAC-0

Data

Latch-0

To DAC-0, DAC-1,

DAC-2, DAC-3

LDAC

RST

RSTSEL

LDAC

User Calibration:

Zero Register 0

Gain Regsiter 0

Internal Trimming

Zero/Gain; INL

AGND-A

CLR

To DAC-4, DAC-5, DAC-6, DAC-7

USB/BTC

GPIO-0

GPIO-1

GPIO-2

OFFSET-B

AGND-B

V_OUT-7

OFFSET

DAC B

(Same Function Blocks

for All Channels)

Reference

Buffer B

Power-Up/

Power-Down

Control

AIN-0

AIN-1

DGND

DV_DD

AV_DD

AV_SS

REF-B

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

DSP is a trademark of Texas Instruments.

SPI, QSPI are trademarks of Motorola Inc.

Microwire is a trademark of National Semiconductor.

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...60

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DAC8218 替代型号

型号	品牌	替代类型	描述	数据表
DAC8728	TI	功能相似	Octal, 16-Bit, Low-Power, High-Voltage Output, Parallel Input DIGITAL-TO-ANALOG CONVERTER
DAC7728	TI	功能相似	Octal, 12-Bit, Low-Power, High-Voltage Output, Parallel Input DIGITAL-TO-ANALOG CONVERTER
DAC7718	TI	功能相似	Octal, 12-Bit, Low-Power, High-Voltage Output, Serial Input DIGITAL-TO-ANALOG CONVERTER

与DAC8218相关器件

型号	品牌	获取价格	描述	数据表
DAC8218_14	TI	获取价格	Octal, 14-Bit, Low-Power, High-Voltage Output, Serial Input DIGITAL-TO-ANALOG CONVERTER
DAC8218SPAG	TI	获取价格	Octal, 14-Bit, Low-Power, High-Voltage Output, Serial Input DIGITAL-TO-ANALOG CONVERTER
DAC8218SPAGR	TI	获取价格	Octal, 14-Bit, Low-Power, High-Voltage Output, Serial Input DIGITAL-TO-ANALOG CONVERTER
DAC8218SRGZR	TI	获取价格	Octal, 14-Bit, Low-Power, High-Voltage Output, Serial Input DIGITAL-TO-ANALOG CONVERTER
DAC8218SRGZT	TI	获取价格	Octal, 14-Bit, Low-Power, High-Voltage Output, Serial Input DIGITAL-TO-ANALOG CONVERTER
DAC8221	ADI	获取价格	Dual 12-Bit Buffered Multiplying CMOS D/A Converter
DAC8221AW	ADI	获取价格	Dual 12-Bit Buffered Multiplying CMOS D/A Converter
DAC8221AW/883	ETC	获取价格	12-Bit Digital-to-Analog Converter
DAC8221AW/883C	ADI	获取价格	Dual 12-Bit Buffered Multiplying CMOS D/A Converter
DAC8221BTC/883C	ETC	获取价格	12-Bit Digital-to-Analog Converter

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