超详细数控电压源设计资料_数控基准电压源电路图资源-CSDN文库

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数控电压源

PROTEUS仿真

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《超详细数控电压源设计资料》是一份涵盖了从理论到实践的综合性教程，主要针对的是电子工程领域的学生或爱好者，尤其是那些对数字控制电压源感兴趣的读者。这份资料详尽地阐述了如何设计一个能实现0到30伏连续可调且具有高精度的数控电压源。其中，电压源不仅具有LCD显示器，可以实时显示电压和电流值，还配备了完整的C语言源代码，便于学习者理解和修改。在设计数控电压源的过程中，首先要理解的是电压源的基本原理，它通常由电源、调节电路和数字控制系统三部分组成。电源提供稳定的电压，调节电路则根据数字信号来改变输出电压，数字控制系统则是通过编程实现电压的精确控制。这份资料中的C语言源代码部分，很可能是用于驱动控制电路，实现电压设定和读取功能的。源代码的详细注释对于初学者来说极其宝贵，可以帮助他们了解每个函数的作用，以及如何与硬件交互。接下来是PROTEUS仿真的部分。PROTEUS是一款强大的电子电路仿真软件，它允许用户在虚拟环境中测试电路设计，而无需实际搭建硬件。通过使用PROTEUS，设计者可以在设计初期就检查潜在的问题，减少实际实验中的错误。资料中可能包含了使用PROTEUS进行数控电压源电路模拟的步骤和方法，这对于验证设计的正确性和优化电路参数非常有用。在学习这份资料时，读者可以先从基础理论入手，理解电压源的工作原理，然后深入研究C语言源代码，学习如何编写控制程序。同时，利用PROTEUS进行电路仿真，将理论与实践相结合，加深对整个系统的理解。读者可以通过实际操作，结合LCD显示器的显示结果，调整并优化设计，以达到预期的电压控制效果。《超详细数控电压源设计资料》是一份宝贵的教育资源，它涵盖了从理论设计、编程实现到电路仿真的全过程，为学习者提供了一个全面掌握数控电压源设计的平台。通过深入学习这份资料，不仅可以提升电子设计技能，还能增强解决问题和实践操作的能力。

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20110517.rar （52个子文件）

数控电压源20110517

常用运放与常见运放型号简介.txt 4KB

keilC51_files

C51_files

App

Function.c 6KB

Reminder.h 324B

Includes.h 505B

Function.h 365B

App.c 1KB

Reminder.c 1KB

DAC

DataWrite.h 376B

DataWrite.c 901B

ADC

DataRead.c 2KB

DataRead.h 492B

Display

Display.h 692B

Display.c 7KB

Key

Key.c 2KB

Key.h 376B

Uv2_files

12power.Uv2 2KB

Display.lst 12KB

12power.hex 11KB

Reminder.lst 3KB

Display.obj 8KB

DataRead.obj 2KB

Key.lst 5KB

App.__i 78B

12power.plg 205B

DataWrite.lst 3KB

DataRead.lst 5KB

App.lst 3KB

12power_Uv2.Bak 2KB

12power 18KB

Function.obj 7KB

App.obj 2KB

12power_Opt.Bak 2KB

Function.lst 11KB

DataWrite.obj 2KB

12power.lnp 153B

Key.obj 3KB

Reminder.obj 2KB

12power.M51 55KB

12power.Opt 2KB

使用芯片的信息.doc 21KB

PROTEUS_FILE

Last Loaded 数控电压源.DBK 145KB

数控电压源.PWI 768B

数控电压源.DSN 145KB

PDF

LM78XX系列稳压管.pdf 316KB

达林顿管TIP122.pdf 53KB

12位DA转换MCP4921.pdf 3.45MB

基准电压芯片MC1403.pdf 46KB

LM7805_DataSheet.pdf 225KB

稳压二极管1N47__A .pdf 28KB

LTC1456_DataSheet.pdf 148KB

LTC1860 LTC1861.pdf 194KB

LTC1451 .pdf 175KB

 2004 Microchip Technology Inc. DS21897A-page 1

MCP4921/4922

Features

•12-Bit Resolution

• ±0.2 LSB DNL (typ)

• ±2 LSB INL (typ)

• Single or Dual Channel

• Rail-to-Rail Output

• SPI™ Interface with 20 MHz Clock Support

• Simultaneous Latching of the Dual DACs w/LDAC

• Fast Settling Time of 4.5 µs

• Selectable Unity or 2x Gain Output

• 450 kHz Multiplier Mode

•External V

REF

Input

• 2.7V to 5.5V Single-Supply Operation

• Extended Temperature Range: -40°C to +125°C

Applications

• Set Point or Offset Trimming

• Sensor Calibration

• Digitally-Controlled Multiplier/Divider

• Portable Instrumentation (Battery-Powered)

• Motor Feedback Loop Control

Block Diagram

Description

The Microchip Technology Inc. MCP492X are 2.7 –

5.5V, low-power, low DNL, 12-Bit Digital-to-Analog Con-

verters (DACs) with optional 2x buffered output and SPI

interface.

The MCP492X are DACs that provide high accuracy

and low noise performance for industrial applications

where calibration or compensation of signals (such as

temperature, pressure and humidity) are required.

The MCP492X are available in the extended tempera-

ture range and PDIP, SOIC, MSOP and TSSOP

packages.

The MCP492X devices utilize a resistive string archi-

tecture, with its inherent advantages of low DNL error,

low ratio metric temperature coefficient and fast settling

time. These devices are specified over the extended

temperature range. The MCP492X include double-

buffered inputs, allowing simultaneous updates using

the LDAC

pin. These devices also incorporate a

Power-On Reset (POR) circuit to ensure reliable

power-up.

Package Types

Op Amps

CS SDI SCK

Interface Logic

Input

DAC

String

DAC

String

DAC

REF

Output

Logic

Power-on

Reset

REF

OUTA

OUTB

LDAC

Buffer

SHDN

Output

Gain

Logic

Gain

Logic

MCP4921

8-Pin PDIP, SOIC, MSOP

SCK

SDI

OUTA

REFA

LDAC

MCP4922

14-Pin PDIP, SOIC, TSSOP

SCK

REFB

SDI

LDAC

SHDN

OUTB

OUTA

REFA

12-Bit DAC with SPI™ Interface

MCP4921/4922

DS21897A-page 2  2004 Microchip Technology Inc.

1.0 ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings †

............................................................................................................. 6.5V

All inputs and outputs w.r.t ............. AV

–0.3V to V

+0.3V

Current at Input Pins ....................................................±2 mA

Current at Supply Pins ...............................................±50 mA

Current at Output Pins ...............................................±25 mA

Storage temperature .....................................-65°C to +150°C

Ambient temp. with power applied ................-55°C to +125°C

ESD protection on all pins ...........≥ 4 kV (HBM), ≥ 400V (MM)

Maximum Junction Temperature (T

)..........................+150°C

† Notice: Stresses above those listed under “Maximum Rat-

ings” may cause permanent damage to the device. This is a

stress rating only and functional operation of the device at

those or any other conditions above those indicated in the

operational listings of this specification is not implied. Expo-

sure to maximum rating conditions for extended periods may

affect device reliability.

5V AC/DC CHARACTERISTICS

Electrical Specifications: Unless otherwise indicated, V

= 5V, AV

= 0V, V

REF

= 2.048V, output buffer gain (G) = 2x, R

= 5 kΩ

to GND, C

= 100 pF T

= -40 to +85°C. Typical values at +25°C.

Parameters Sym Min Typ Max Units Conditions

Power Requirements

Input Voltage V

2.7 — 5.5

Input Current - MCP4921

Input Current - MCP4922

—

175

350

700

µA Input unbuffered, digital inputs

grounded, output unloaded,

code at 0x000

Hardware Shutdown Current I

SHDN

—0.3 2 µA

Software Shutdown Current I

SHDN_SW

—3.3 6 µA

Power-on-Reset Threshold V

POR

—2.0 — V

DC Accuracy

Resolution n 12 — — Bits

INL Error INL -12 2 12 LSB

DNL DNL -0.75 ±0.2 +0.75 LSB Device is Monotonic

Offset Error V

— ±0.02 1 % of FSR Code 0x000h

Offset Error Temperature

Coefficient

/°C — 0.16 — ppm/°C -45°C to 25°C

— -0.44 — ppm/°C +25°C to 85°C

Gain Error g

— -0.10 1 % of FSR Code 0xFFFh, not including offset

error.

Gain Error Temperature

Coefficient

∆G/°C — -3 — ppm/°C

Input Amplifier (V

REF

Input)

Input Range - Buffered Mode V

REF

0.040 — V

– 0.040 V Note 1

Code = 2048

REF

= 0.2v p-p, f = 100 Hz and 1 kHz

Input Range - Unbuffered

Mode

REF

0— V

Input Impedance R

VREF

— 165 — kΩ Unbuffered Mode

Input Capacitance -

Unbuffered Mode

VREF

—7 — pF

Multiplier Mode

-3 dB Bandwidth

VREF

— 450 — kHz V

REF

= 2.5V ±0.2Vp-p, Unbuffered,

G = 1

VREF

— 400 — kHz V

REF

= 2.5V ±0.2 Vp-p, Unbuffered,

G = 2

Multiplier Mode -

Total Harmonic Distortion

THD

VREF

—-73 — dBV

REF

= 2.5V ±0.2Vp-p,

Frequency = 1 kHz

Note 1: By design, not production tested.

2: Too small to quantify.

 2004 Microchip Technology Inc. DS21897A-page 3

MCP4921/4922

Output Amplifier

Output Swing V

OUT

— 0.010

to V

– 0.040

— Accuracy is better than 1 LSB for

OUT

= 10 mV to (V

– 40 mV)

Phase Margin

θm — 66 — degrees

Slew Rate SR — 0.55 — V/µs

Short Circuit Current I

—15 24 mA

Settling Time t

settling

— 4.5 — µs Within 1/2 LSB of final value from 1/4

to 3/4 full-scale range

Dynamic Performance

DAC-to-DAC Crosstalk — 10 — nV-s Note 2

Major Code Transition Glitch — 45 — nV-s 1 LSB change around major carry

(0111...1111 to 1000...0000)

Digital Feedthrough — 10 — nV-s Note 2

Analog Crosstalk — 10 — nV-s Note 2

5V AC/DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, V

= 5V, AV

= 0V, V

REF

= 2.048V, output buffer gain (G) = 2x, R

= 5 kΩ

to GND, C

= 100 pF T

= -40 to +85°C. Typical values at +25°C.

Parameters Sym Min Typ Max Units Conditions

Note 1: By design, not production tested.

2: Too small to quantify.

3V AC/DC CHARACTERISTICS

Electrical Specifications: Unless otherwise indicated, V

= 3V, AV

= 0V, V

REF

= 2.048V external, output buffer gain (G) = 1x,

= 5 kΩ to GND, C

= 100 pF T

= -40 to +85°C. Typical values at 25°C

Parameters Sym Min Typ Max Units Conditions

Power Requirements

Input Voltage V

2.7 — 5.5

Input Current - MCP4921

Input Current - MCP4922

—

125

250

500

µA Input unbuffered, digital inputs

grounded, output unloaded,

code at 0x000

Hardware Shutdown Current I

SHDN

—0.25 2 µA

Software Shutdown Current I

SHDN_SW

—2 6 µA

Power-On Reset threshold V

POR

—2.0 — V

DC Accuracy

Resolution n 12 — — Bits

INL Error INL -12 ±3 +12 LSB

DNL DNL -0.75 ±0.3 +0.75 LSB Device is Monotonic

Offset Error V

— ±0.02 1 % of FSR Code 0x000h

Offset Error Temperature

Coefficient

/°C — 0.5 — ppm/°C -45°C to 25°C

— -0.77 — ppm/°C +25°C to 85°C

Gain Error g

— -0.15 1 % of FSR Code 0xFFFh, not including offset

error.

Gain Error Temperature

Coefficient

∆G/°C — -3 — ppm/°C

Input Amplifier (V

REF

Input)

Input Range - Buffered Mode V

REF

0.040 — V

-0.040 V Note 1

Code = 2048,

REF

= 0.2v p-p, f = 100 Hz and 1 kHz

Input Range - Unbuffered

Mode

REF

0— V

Input Impedance R

VREF

— 165 — kΩ Unbuffered Mode

Note 1: By design, not production tested.

2: Too small to quantify.

MCP4921/4922

DS21897A-page 4  2004 Microchip Technology Inc.

Input Capacitance –

Unbuffered Mode

VREF

—7 — pF

Multiplier Mode

-3 dB Bandwidth

VREF

— 440 — kHz V

REF

= 2.048V ±0.1 Vp-p, unbuffered,

G = 1

VREF

— 390 — kHz V

REF

= 2.048V ±0.1 Vp-p, unbuffered,

G = 2

Multiplier Mode –

Total Harmonic Distortion

THD

VREF

—-73 — dBV

REF

= 2.5V ±0.1 Vp-p,

Frequency = 1 kHz

Output Amplifier

Output Swing V

OUT

— 0.010

to V

– 0.040

— Accuracy is better than 1 LSB for

OUT

= 10 mV to (V

– 40 mV)

Phase Margin

θm — 66 — degrees

Slew Rate SR — 0.55 — V/µs

Short Circuit Current I

—14 24 mA

Settling Time t

settling

— 4.5 — µs Within 1/2 LSB of final value from 1/4

to 3/4 full-scale range

Dynamic Performance

DAC-to-DAC Crosstalk — 10 — nV-s Note 2

Major Code Transition Glitch — 45 — nV-s 1 LSB change around major carry

(0111...1111 to 1000...0000)

Digital Feedthrough — 10 — nV-s Note 2

Analog Crosstalk — 10 — nV-s Note 2

3V AC/DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, V

= 3V, AV

= 0V, V

REF

= 2.048V external, output buffer gain (G) = 1x,

= 5 kΩ to GND, C

= 100 pF T

= -40 to +85°C. Typical values at 25°C

Parameters Sym Min Typ Max Units Conditions

Note 1: By design, not production tested.

2: Too small to quantify.

5V EXTENDED TEMPERATURE SPECIFICATIONS

Electrical Specifications: Unless otherwise indicated, V

= 5V, AV

= 0V, V

REF

= 2.048V, output buffer gain (G) = 2x, R

= 5 kΩ

to GND, C

= 100 pF. Typical values at +125°C by characterization or simulation.

Parameters Sym Min Typ Max Units Conditions

Power Requirements

Input Voltage V

2.7 — 5.5

Input Current - MCP4921

Input Current - MCP4922

—

200

400

—

µA Input unbuffered, digital inputs

grounded, output unloaded,

code at 0x000

Hardware Shutdown Current I

SHDN

—1.5— µA

Software Shutdown Current I

SHDN_SW

—5— µA

Power-On Reset threshold V

POR

—1.85— V

DC Accuracy

Resolution n 12 — — Bits

INL Error INL — ±4 — LSB

DNL DNL — ±0.25 — LSB Device is Monotonic

Offset Error V

— ±0.02 — % of FSR Code 0x000h

Offset Error Temperature

Coefficient

/°C — -5 — ppm/°C +25°C to +125°C

Note 1: By design, not production tested.

2: Too small to quantify.

 2004 Microchip Technology Inc. DS21897A-page 5

MCP4921/4922

Gain Error g

— -0.10 — % of FSR Code 0xFFFh, not including offset

error

Gain Error Temperature

Coefficient

∆G/°C — -3 — ppm/°C

Input Amplifier (V

REF

Input)

Input Range - Buffered Mode V

REF

— 0.040 to

0.040

—VNote 1

Code = 2048,

REF

= 0.2v p-p, f = 100 Hz and 1 kHz

Input Range - Unbuffered

Mode

REF

0—V

Input Impedance R

VREF

— 174 — kΩ Unbuffered Mode

Input Capacitance -

Unbuffered Mode

VREF

—7— pF

Multiplying Mode

-3 dB Bandwidth

VREF

— 450 — kHz V

REF

= 2.5V ±0.1 Vp-p, Unbuffered,

G=1

VREF

— 400 — kHz V

REF

= 2.5V ±0.1 Vp-p, Unbuffered,

G = 2

Multiplying Mode - Total

Harmonic Distortion

THD

VREF

——— dBV

REF

= 2.5V ±0.1Vp-p,

Frequency = 1 kHz

Output Amplifier

Output Swing V

OUT

— 0.010 to

–

0.040

— Accuracy is better than 1 LSB for

OUT

= 10 mV to (V

– 40 mV)

Phase Margin

θm — 66 — degrees

Slew Rate SR — 0.55 — V/µs

Short Circuit Current I

—17— mA

Settling Time t

settling

— 4.5 — µs Within 1/2 LSB of final value from 1/4

to 3/4 full-scale range

Dynamic Performance

DAC to DAC Crosstalk — 10 — nV-s Note 2

Major Code Transition Glitch — 45 — nV-s 1 LSB change around major carry

(0111...1111 to 1000...0000)

Digital Feedthrough — 10 — nV-s Note 2

Analog Crosstalk — 10 — nV-s Note 2

5V EXTENDED TEMPERATURE SPECIFICATIONS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, V

= 5V, AV

= 0V, V

REF

= 2.048V, output buffer gain (G) = 2x, R

= 5 kΩ

to GND, C

= 100 pF. Typical values at +125°C by characterization or simulation.

Parameters Sym Min Typ Max Units Conditions

Note 1: By design, not production tested.

2: Too small to quantify.

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xiangzilou

2014-04-12

资料很多，但是很基础，可以用于练手入门
wszq1

2015-01-20

确实好详细，内容也很有用
00QQ00

2015-06-14

挺基础的，适合入门

yibing21go

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