ti的12位DAC7612驱动程序_12位da芯片资源-CSDN下载

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12位DA

DAC7612

驱动程序

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TI公司的DAC7612是一款高精度的12位数模转换器(DAC)，它集成了内部基准电压源，能够提供双通道模拟输出。这款芯片适用于各种需要精确模拟信号输出的电子系统，如数据采集系统、工业自动化、仪器仪表以及通信设备等。下面将详细介绍DAC7612的关键特性和驱动程序相关的知识点。 1. **12位分辨率**：DAC7612具有12位的数字输入，这意味着它可以产生2^12=4096个不同的输出电压等级，最小步进为1mV。这种高分辨率使得在宽范围内的电压调整变得更加精细，满足对精确模拟信号的需求。 2. **内置基准电压**：DAC7612内置了基准电压源，无需外部基准电压，简化了系统设计。用户可以根据需求选择不同的基准电压设置，以得到不同的输出电压范围。 3. **双通道输出**：该器件提供了两个独立的模拟输出，可以在同一时钟周期内分别更新两个通道的输出，方便实现双路同步或独立控制，增强了系统的灵活性。 4. **快速转换**：DAC7612的转换速度快，能迅速响应数字输入的变化，确保了系统的实时性能。快速转换速度对于高速信号处理应用尤其关键。 5. **低误差**：由于其高精度设计，DAC7612的输出误差很小，确保了输出信号的准确性，这对于需要高精度模拟信号的系统来说至关重要。 6. **驱动程序**：为了使用DAC7612，需要编写合适的驱动程序来控制数字输入并完成与微控制器或其他数字系统的接口。驱动程序通常包括初始化设置、数据传输、通道选择和转换启动等功能。例如，如果使用的是基于微处理器的系统，驱动程序会包含I/O端口配置、中断处理以及必要的同步机制。 7. **接口协议**：DAC7612通常通过SPI (Serial Peripheral Interface) 或者类似的串行接口与微控制器通讯。理解这些接口协议是编写驱动程序的关键，包括时钟极性、时钟相位、数据格式和传输方向等参数。 8. **应用电路设计**：在实际应用中，除了驱动程序，还需要考虑电源供电、滤波电路、负载匹配和保护电路等。例如，为了减少噪声和提高输出稳定性，可能需要在输出端添加低通滤波器。 9. **参考文档**："dac7612.pdf"可能是DAC7612的数据手册，包含了芯片的电气特性、引脚配置、工作原理以及推荐的应用电路。"DAC7612"可能是示例代码或者更详细的使用指南，可以帮助开发者快速理解和使用该器件。 10. **调试与测试**：在系统集成后，必须进行详细的调试和测试，确保驱动程序正确无误地驱动DAC7612，并且输出符合预期的模拟信号。这通常涉及电压测量、转换速率验证和长期稳定性测试等。通过了解和掌握以上知识点，开发者可以有效地利用TI的DAC7612来构建高效、精确的模拟输出系统。

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TI的12位双路串行数模转换器DAC7612驱动.rar （19个子文件）

dac7612.pdf 333KB

DAC7612

main.OBJ 3KB

dac7612.h 99B

DAC7612.Opt 3KB

main.c 2KB

STARTUP.LST 14KB

DAC7612_Uv2.Bak 0B

DAC7612_Opt.Bak 3KB

DAC7612.Uv2 2KB

main.LST 4KB

DAC7612.lnp 75B

DAC7612.plg 173B

dac7612.OBJ 2KB

dac7612.c 1KB

STARTUP.A51 6KB

STARTUP.OBJ 749B

dac7612.LST 3KB

DAC7612.M51 8KB

DAC7612 6KB

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111

Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

DAC7612

Dual, 12-Bit Serial Input

DIGITAL-TO-ANALOG CONVERTER

DESCRIPTION

The DAC7612 is a dual, 12-bit digital-to-analog con-

verter (DAC) with guaranteed 12-bit monotonicity

performance over the industrial temperature range. It

requires a single +5V supply and contains an input

shift register, latch, 2.435V reference, a dual DAC, and

high speed rail-to-rail output amplifiers. For a full-

scale step, each output will settle to 1 LSB within 7µs

while only consuming 3.7mW.

The synchronous serial interface is compatible with a

wide variety of DSPs and microcontrollers. Clock

(CLK), Serial Data In (SDI), Chip Select (CS) and

Load DACs (LOADDACS) comprise the serial inter-

face.

The DAC7612 is available in an 8-lead SOIC package

and is fully specified over the industrial temperature

range of –40°C to +85°C.

FEATURES

● LOW POWER: 3.7mW

● FAST SETTLING: 7µs to 1 LSB

● 1mV LSB WITH 4.095V FULL-SCALE

RANGE

● COMPLETE WITH REFERENCE

● 12-BIT LINEARITY AND MONOTONICITY

OVER INDUSTRIAL TEMP RANGE

● 3-WIRE INTERFACE: Up to 20MHz Clock

● SMALL PACKAGE: 8-Lead SOIC

APPLICATIONS

● PROCESS CONTROL

● DATA ACQUISITION SYSTEMS

● CLOSED-LOOP SERVO-CONTROL

● PC PERIPHERALS

● PORTABLE INSTRUMENTATION

DAC7612

12-Bit DAC A

DAC Register A

14-Bit Serial Shift Register

DAC Register B

Ref

LOADDACS

CLK

SDI

GND

OUTA

DAC7612

12-Bit DAC B

OUTB

SBAS106

DAC7612

SPECIFICATIONS

At T

= –40°C to +85°C, and V

= +5V, unless otherwise noted.

The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes

no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change

without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant

any BURR-BROWN product for use in life support devices and/or systems.

DAC7612U DAC7612UB

PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS

RESOLUTION 12 ✻ Bits

ACCURACY

Relative Accuracy

(1)

–2 ±1/2 +2 –1 ±1/4 +1 LSB

Differential Nonlinearity Guaranteed Monotonic –1 ±1/2 +1 –1 ±1/4 +1 LSB

Zero-Scale Error Code 000

–1 +1 +3 ✻✻✻ LSB

Zero Scale Match Code 000

1/2 1/2 2 LSB

Full-Scale Voltage Code FFF

4.079 4.095 4.111 4.087 4.095 4.103 V

Full-Scale Match Code FFF

1/2 1/2 2 LSB

ANALOG OUTPUT

Output Current Code 800

±5 ±7 ✻✻ mA

Load Regulation R

LOAD

≥ 402Ω, Code 800

13 ✻✻ LSB

Capacitive Load No Oscillation 500 ✻ pF

Short-Circuit Current ±15 ✻ mA

Short-Circuit Duration GND or V

Indefinite ✻

DIGITAL INPUT

Data Format Serial ✻

Data Coding Straight Binary ✻

Logic Family CMOS ✻

Logic Levels

0.7 • V

✻ V

0.3 • V

✻ V

±10 ✻ µA

DYNAMIC PERFORMANCE

Settling Time

(2)

) To ±1 LSB of Final Value 7 ✻ µs

DAC Glitch 2.5 ✻ nV-s

Digital Feedthrough 0.5 ✻ nV-s

POWER SUPPLY

+4.75 +5.0 +5.25 ✻✻✻ V

= 5V, V

= 0V, No Load, at Code 000

0.75 1.5 ✻✻ mA

Power Dissipation V

= 5V, V

= 0V, No Load 3.5 7.5 ✻✻ mW

Power Supply Sensitivity ∆V

= ±5% 0.0025 0.002 ✻✻%/%

TEMPERATURE RANGE

Specified Performance –40 +85 ✻✻°C

✻ Same specification as for DAC7612U.

NOTES: (1) This term is sometimes referred to as Linearity Error or Integral Nonlinearity (INL). (2) Specification does not apply to negative-going transitions where

the final output voltage will be within 3 LSBs of ground. In this region, settling time may be double the value indicated.

DAC7612

PIN CONFIGURATION

Top View SO-8

to GND .......................................................................... –0.3V to 6V

Digital Inputs to GND ..............................................–0.3V to V

+ 0.3V

OUT

to GND ...........................................................–0.3V to V

+ 0.3V

Power Dissipation ........................................................................ 325mW

Thermal Resistance,

........................................................... 150°C/W

Maximum Junction Temperature ..................................................+150°C

Operating Temperature Range ...................................... –40°C to +85°C

Storage Temperature Range ....................................... –65°C to +150°C

Lead Temperature (soldering, 10s) .............................................. +300°C

NOTE: (1) Stresses above those listed under “Absolute Maximum Ratings”

may cause permanent damage to the device. Exposure to absolute maximum

conditions for extended periods may affect device reliability.

ABSOLUTE MAXIMUM RATINGS

(1)

PIN DESCRIPTIONS

PIN LABEL DESCRIPTION

1 SDI Serial Data Input. Data is clocked into the internal

serial register on the rising edge of CLK.

2 CLK Synchronous Clock for the Serial Data Input.

3 LOADDACS Loads the internal DAC registers. All DAC registers

are transparent latches and are transparent when

LOADDACS is LOW (regardless of the state of CS

or CLK).

4 CS Chip Select. Active LOW.

OUTB

DAC B Output Voltage

6 GND Ground

Positive Power Supply

OUTA

DAC A Output Voltage

ELECTROSTATIC

DISCHARGE SENSITIVITY

This integrated circuit can be damaged by ESD. Burr-Brown

recommends that all integrated circuits be handled with

appropriate precautions. Failure to observe proper handling

and installation procedures can cause damage.

ESD damage can range from subtle performance degrada-

tion to complete device failure. Precision integrated circuits

may be more susceptible to damage because very small

parametric changes could cause the device not to meet its

published specifications.

PACKAGE/ORDERING INFORMATION

MINIMUM

RELATIVE DIFFERENTIAL SPECIFICATION PACKAGE

ACCURACY NONLINEARITY TEMPERATURE DRAWING ORDERING TRANSPORT

PRODUCT (LSB) (LSB) RANGE PACKAGE NUMBER

(1)

NUMBER

(2)

MEDIA

DAC7612U ±2 ±1 –40°C to +85°C SO-8 182 DAC7612U Rails

"" " " ""DAC7612U/2K5 Tape and Reel

DAC7612UB ±1 ±1 –40°C to +85°C SO-8 182 DAC7612UB Rails

"" " " ""DAC7612UB/2K5 Tape and Reel

NOTES: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) Models with a slash (/) are

available only in Tape and Reel in the quantities indicated (e.g., /2K5 indicates 2500 devices per reel). Ordering 2500 pieces of “DAC7612U/2K5” will get a single

2500-piece Tape and Reel. For detailed Tape and Reel mechanical information, refer to Appendix B of Burr-Brown IC Data Book.

SDI

CLK

LOADDACS

OUTA

GND

OUTB

DAC7612U

DAC7612

EQUIVALENT INPUT LOGIC

Serial Shift Register

DAC B Register

DAC A Register

DAC Switches

Data

DAC Switches

ESD protection

diodes to V

and GND

LOADDACS

SDI

CLK

DAC7612

TIMING DIAGRAMS

LOGIC TRUTH TABLE TIMING SPECIFICATIONS

= –40°C to +85°C and V

= +5V.

SYMBOL DESCRIPTION MIN TYP MAX UNITS

Clock Width HIGH 30 ns

Clock Width LOW 30 ns

LDW

Load Pulse Width 20 ns

Data Setup 15 ns

Data Hold 15 ns

LD1

Load Setup 15 ns

LD2

Load Hold 10 ns

CSS

Select 30 ns

CSH

Deselect 20 ns

NOTE: All input control signals are specified with t

= t

= 5ns (10% to 90%

of +5V) and timed from a voltage level of 2.5V. These parameters are

guaranteed by design and are not subject to production testing.

SDI

CLK

SERIAL SHIFT DAC DAC

A1 A0

CLK

LOADDACS

X X X H H No Change No Change No Change

↑

L H Shifts One Bit No Change No Change

LXXH

(1)

L No Change Loads Serial Loads Serial

Data Word Data Word

H L X H L No Change Loads Serial No Change

Data Word

H H X H L No Change No Change Loads Serial

Data Word

↑ Positive Logic Transition; X = Don’t Care.

NOTE: (1) A HIGH value is suggested in order to avoid to “false clock” from

advancing the shift register and changing the DAC voltage.

B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12 B13

A1 A0 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

DATA INPUT TABLE

(MSB) (LSB)

SDI

CLK

LOADDACS

A0 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

CSS

LD1

LD2

CSH

LOADDACS

OUT

LDW

±1 LSB

Error Band

评论收藏

内容反馈

zhengxiaonian1224

2014-07-07

参考，已经实际应用
heimawangzi0123456

2019-10-09

参考一下，谢谢
章颖

2013-08-23

很幸运能够下载到这么好的程序，思路清晰，很实用！
今朝lv

2013-08-08

底层驱动写的很不错
sunlizhi300

2014-10-22

底层驱动写的很不错

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