Datasheet > PIC16LC73-04I/SO

PIC16LC73-04I/SO

更新时间： 2024-10-05 20:33:11

品牌	Logo	应用领域
美国微芯 - MICROCHIP		时钟微控制器光电二极管外围集成电路
页数	文件大小	规格书
8页	93K
描述
8-BIT, MROM, 4 MHz, RISC MICROCONTROLLER, PDSO28, 0.300 INCH, PLASTIC, SO-28

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PIC16LC73-04I/SO 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	SOIC
包装说明：	SOP, SOP28,.4	针数：	28
Reach Compliance Code：	compliant	HTS代码：	8542.31.00.01
风险等级：	5.13	Is Samacsys：	N
具有ADC：	YES	地址总线宽度：
位大小：	8	CPU系列：	PIC
最大时钟频率：	4 MHz	DAC 通道：	NO
DMA 通道：	NO	外部数据总线宽度：
JESD-30 代码：	R-PDSO-G28	JESD-609代码：	e3
长度：	17.894 mm	湿度敏感等级：	1
I/O 线路数量：	22	端子数量：	28
最高工作温度：	85 °C	最低工作温度：	-40 °C
PWM 通道：	YES	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装等效代码：	SOP28,.4
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	260	电源：	3.3/5 V
认证状态：	Not Qualified	RAM（字节）：	192
ROM（单词）：	4096	ROM可编程性：	MROM
座面最大高度：	2.642 mm	速度：	4 MHz
子类别：	Microcontrollers	最大压摆率：	3.8 mA
最大供电电压：	6 V	最小供电电压：	3 V
标称供电电压：	5 V	表面贴装：	YES
技术：	CMOS	温度等级：	INDUSTRIAL
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	40	宽度：	7.5055 mm
uPs/uCs/外围集成电路类型：	MICROCONTROLLER, RISC	Base Number Matches：	1

PIC16LC73-04I/SO 数据手册

FACT002

Mastering the PIC16C7X A/D Converter

General

Author:

Jim Simons

Microchip Technology Inc.

Even though we are converting to the ‘digital world’, we

must remember that certain analog ‘laws’ still hold true.

Specifically, the A/D is basically a capacitor which has

to have time to charge/discharge to the analog level on

the I/O pin before a conversion can be started. Source

impedance and internal impedances add up to give an

effective resistance in series with the capacitor(s). This

RC time constant determines the minimum amount of

charge/discharge time to achieve a desired accuracy.

This time is the minimum tracking time (referred to as

the minimum sampling time in our data book). Once the

minimum time has been met, the voltage on the capac-

itor will track the voltage on the I/O pin until a conver-

sion is started. Once the conversion has begun, the I/O

pin is internally disconnected from the capacitor. The

voltage on the capacitor is held constant for the entire

conversion process. This type of sampling circuit is

referred to as a "track and hold".

The Analog-to-Digital converter (A/D) is the primary

tool that allows analog signals to be quantized into the

world of digital electronics. Once the signal is digitally

represented, it can be stored, analyzed and manipu-

lated by a variety of logic devices. The PIC16C7X

microcontrollers have an A/D integrated onto the

PIC16CXX core processor. Utilizing Microchip’s A/D

requires only a basic level of understanding to get a

result. However, maximizing the effectiveness of the

A/D for each specific application requires a higher level

of thought and understanding. Typically, a thorough

comprehension of a device is obtained through experi-

ence, studying data sheets and studying application

notes for a reasonable amount of time. This article

addresses the main technical considerations for an

effective design to reduce your design time.

Step by Step

When detailing how to maximize the effectiveness of

any design, we look at the weakest (and strongest) ele-

ments. Please DO NOT misinterpret the statements

detailing weaknesses to be below our specification.

Our part specifications are based upon the worst case.

All suggestions should improve on the worst case

specifications.

1. In order to perform a conversion, you must

enable the A/D by setting the ADON bit

(ADCON0 register).

2. Select the channel to be sampled by setting/

clearing the CHS2, CHS1, and CHS0 bits

(ADCON0 register). See the ADCON0 register’s

bit descriptions in the device’s data sheet for the

actual bit combinations for the selected

channel(s).

We’ll start by covering the A/D Basics, then dive into

the other three general technical categories, which are

essential for an effective design:

3. The default input setup of all analog I/O pins is

analog, not digital. For I/O pins set up as analog,

the digital input buffers are internally discon-

nected. This is to keep analog voltages off of the

CMOS input buffer. If the input voltage on a dig-

ital I/O was 0.5 VDD for example, then both the

PMOS and NMOS cells which make up the

CMOS input buffer would be turned on. This

causes the input buffer to draw around 100 to

150 µA.

• Speed

• Accuracy

• Power Usage

BASICS

Specifications

Microchip’s A/D is a successive approximation A/D

which uses a bank of internal capacitors totalling

51.2 pF. The maximum resolution of the A/D is 8-bits.

The converter accuracy specification is ±1 bit, but that

can be made better or worse by your design. The ana-

log channels are multiplexed to the converter which

means that only one analog channel can be sampled at

a time. The conversion time and maximum sampling

frequency is application specific.

If you are using an analog I/O as a digital input, load the

default from analog to digital. The I/O pin’s bit will

always read as a 0 when configured as an analog input

(since it is disconnected from the pin). See the

ADCON1 register’s bit descriptions in the device’s data

sheet for the actual bit combinations for the selected

channel(s).

 2002 Microchip Technology Inc.

DS00839A-page 1

12 3 4 5 6 7 8

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与PIC16LC73-04I/SO相关器件

型号	品牌	获取价格	描述	数据表
PIC16LC73-04I/SS	MICROCHIP	获取价格	8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDSO28, 0.209 INCH, PLASTIC, SSOP-28
PIC16LC73-04JW	MICROCHIP	获取价格	8-BIT, UVPROM, 4 MHz, RISC MICROCONTROLLER, CDIP28, 0.600 INCH, WINDOWED, CERDIP-28
PIC16LC73A-04/JW	MICROCHIP	获取价格	8-BIT, UVPROM, 4 MHz, RISC MICROCONTROLLER, CDIP28, 0.300 INCH, WINDOWED, SIDE BRAZED, CER
PIC16LC73A-04/SO	ETC	获取价格	8-Bit Microcontroller
PIC16LC73A-04E/JW	ETC	获取价格	MICROCONTROLLER\|8-BIT\|PIC CPU\|CMOS\|DIP\|28PIN\|CERAMIC
PIC16LC73A-04E/SO	MICROCHIP	获取价格	8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDSO28, 0.300 INCH, PLASTIC, SOIC-28
PIC16LC73A-04E/SP	MICROCHIP	获取价格	8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDIP28, 0.300 INCH, SKINNY, PLASTIC, DIP-28
PIC16LC73A-04I/JW	MICROCHIP	获取价格	8-BIT, UVPROM, 4 MHz, RISC MICROCONTROLLER, CDIP28, 0.300 INCH, WINDOWED, SIDE BRAZED, CER
PIC16LC73A-04I/SO	ETC	获取价格	MICROCONTROLLER\|8-BIT\|PIC CPU\|CMOS\|SOP\|28PIN\|PLASTIC
PIC16LC73AI-04/SP	MICROCHIP	获取价格	IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,LDCC,44PIN,PLASTIC

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