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參數(shù)資料
| 型號： | STR731FV0T6 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | ARM7TDMI 32-bit MCU with Flash, 3x CAN, 4 UARTs, 20 timers, ADC, 12 comm. interfaces |
| 中文描述： | ARM7TDMI的32位微控制器的閃存，3倍的CAN，4個(gè)UART，20定時(shí)器，ADC和12通信設(shè)備。接口 |
| 文件頁數(shù)： | 46/53頁 |
| 文件大?。?/td> | 764K |
| 代理商： | STR731FV0T6 |
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Electrical parameters
STR73xF
46/53
Analog Power Supply and Reference Pins
The V
DDA
and V
SSA
pins are the analog power supply of the A/D converter cell. They
act as
the high and low reference voltages for the conversion.
Separation of the digital and analog power pins allow board designers to improve A/D
performance. Conversion accuracy can be impacted by voltage drops and noise in the event
of heavily loaded or badly decoupled power supply lines (see
: General PCB Design
Guidelines
).
General PCB Design Guidelines
To obtain best results, some general design and layout rules should be followed when
designing the application PCB to shield the noise-sensitive, analog physical interface from
noise-generating CMOS logic signals.
Use separate digital and analog planes. The analog ground plane should be connected
to the digital ground plane via a single point on the PCB.
Filter power to the analog power planes. It is recommended to connect capacitors, with
good high frequency characteristics, between the power and ground lines,
placing
0.1μF and optionally, if needed 10pF capacitors as close as possible to the STR7
power supply pins and a 1 to 10μF capacitor close to the power source (see
Figure 23
).
The analog and digital power supplies should be connected in a star network. Do not
use a resistor, as V
DDA
is
used as a reference voltage by the A/D converter and
any
resistance would cause a voltage drop and a loss of accuracy.
Properly place components and route the signal traces on the PCB to shield the analog
inputs. Analog signals paths should run over the analog ground plane and be as short
as possible. Isolate analog signals from digital signals that may switch while the analog
inputs are being sampled by the A/D converter. Do not toggle digital outputs near the
A/D input being converted.
●
●
●
●
Software Filtering of Spurious Conversion Results
For EMC performance reasons, it is recommended to filter A/D conversion outliers using
software filtering techniques.
Figure 23. Power Supply Filtering
V
SS
V
DD
0.1
μ
F
5V
STR73x
V
DDA
V
SSA
POWER
SUPPLY
SOURCE
STR7
DIGITAL NOISE
FILTERING
EXTERNAL
NOISE
FILTERING
1 to 10
μ
F
0.1
μ
F
相關(guān)PDF資料 |
PDF描述 |
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| STR731FV1T6 | ARM7TDMI 32-bit MCU with Flash, 3x CAN, 4 UARTs, 20 timers, ADC, 12 comm. interfaces |
| STR731FV2T6 | ARM7TDMI 32-bit MCU with Flash, 3x CAN, 4 UARTs, 20 timers, ADC, 12 comm. interfaces |
| STR735FZ1H6 | ARM7TDMI 32-bit MCU with Flash, 3x CAN, 4 UARTs, 20 timers, ADC, 12 comm. interfaces |
| STR735FZ1T6 | ARM7TDMI 32-bit MCU with Flash, 3x CAN, 4 UARTs, 20 timers, ADC, 12 comm. interfaces |
| STR735FZ2H6 | ARM7TDMI 32-bit MCU with Flash, 3x CAN, 4 UARTs, 20 timers, ADC, 12 comm. interfaces |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| STR731FV0T7 | 功能描述:ARM微控制器 - MCU 32Bit MCU with Flash STR73xF ARM7TDMI RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:72 MHz 程序存儲(chǔ)器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT |
| STR731FV1T6 | 功能描述:ARM微控制器 - MCU 32Bit MCU with Flash STR73xF ARM7TDMI RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:72 MHz 程序存儲(chǔ)器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT |
| STR731FV1T7 | 功能描述:ARM微控制器 - MCU 32Bit MCU with Flash STR73xF ARM7TDMI RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:72 MHz 程序存儲(chǔ)器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT |
| STR731FV2H7 | 制造商:STMicroelectronics 功能描述:ARM7TDMI- 32-BIT MCU WITH FLASH, 3X CAN, 4 UARTS, 20 TIMERS, - Trays |
| STR731FV2T6 | 功能描述:ARM微控制器 - MCU ARM7TDMI 32-BIT MCU 3X CAN, 4UART, ADC RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:72 MHz 程序存儲(chǔ)器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT |
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