參數(shù)資料
型號(hào)： MAXQ7667AACM/V+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 13/40頁(yè)
文件大?。?/td> 0K
描述： IC MCU-BASED DAS 16BIT 48-LQFP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,000
系列： MAXQ®
核心處理器： RISC
芯體尺寸： 16-位
速度： 16MHz
連通性： LIN，SPI，UART/USART
外圍設(shè)備： 欠壓檢測(cè)/復(fù)位，POR，WDT
輸入/輸出數(shù)： 16
程序存儲(chǔ)器容量： 32KB（16K x 16）
程序存儲(chǔ)器類(lèi)型： 閃存
RAM 容量： 2K x 16
電壓 - 電源 (Vcc/Vdd)： 2.25 V ~ 2.75 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 5x12b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 125°C
封裝/外殼： 48-LQFP
包裝： 帶卷 (TR)
MAXQ7667
16-Bit, RISC, Microcontroller-Based,
Ultrasonic Distance-Measuring System
20
______________________________________________________________________________________
SAR ADC Analog Input Track-and-Hold (T/H)
Figures 6 and 7 show the equivalent input circuit of the
MAXQ7667 analog input architecture. During acquisi-
tion (track), a sampling capacitor charges to the posi-
tive input voltage at AIN0–AIN4 in single-ended mode
or AIN0 and AIN2 in differential mode while a second
sampling capacitor connects to AGND in single-ended
mode or AIN1 and AIN3 in differential mode. The ADC
conversion start source and the ADC dual mode selec-
tion bits control the T/H timing.
Voltage Reference
The MAXQ7667 supports three possible voltage refer-
ence sources for ADC conversion; 2.5V internal
buffered bandgap reference, external source, and
AVDD. The internal 2.5V bandgap reference has high
initial accuracy and temperature coefficient of typically
less than 100ppm/°C. When operating in internal refer-
ence mode, either the buffered output of the internal
reference or AVDD connects to the SAR ADC while the
buffered output of the internal reference connects to the
sigma-delta ADC. When operating in external reference
mode, an external source ranging between 1V and
VAVDD applied at either the REF or REFBG inputs pro-
vides the reference to the SAR ADC and sigma-delta
ADC. Bypass REFBG and REF to AGND with a 0.47F
capacitor for optimum performance. See Section 14 of
the
MAXQ7667 User’s Guide.
Schedule Timer
The MAXQ7667’s schedule timer provides general time-
keeping and software synchronization to an external I/O.
The schedule timer features include the following:
16-bit autoreload up-counter for the timer
Programmable 16-bit alarm register
Alarm interrupts
Schedule timer incremented by a programmable
system clock prescaler (1, 1/2, 1/4, 1/8, 1/16, 1/32,
1/64, 1/128)
Schedule timer up-counter resettable through an
external I/O pin, which allows synchronization of a
schedule timer to an external event
Wake-up alarm to pull the system clock from stop-
mode to normal operation
Figure 8 shows a simplified block diagram of the
schedule timer.
AGND
AIN+
AIN-
CIN+
AVDD
CIN-
RIN+
RIN-
Figure 6. Equivalent Input Circuit (Track/Acquisition Mode)
AGND
AIN+
AIN-
CIN+
CIN-
RIN+
RIN-
AVDD
Figure 7. Equivalent Input Circuit (Hold/Conversion Mode)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAXQ7667EVKIT 功能描述:開(kāi)發(fā)板和工具包 - 其他處理器 RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評(píng)估:P3041 核心:e500mc 接口類(lèi)型:I2C, SPI, USB 工作電源電壓:
MAXQ7667EVKIT+ 功能描述:開(kāi)發(fā)板和工具包 - 其他處理器 MAXQ7667 Eval Kit RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評(píng)估:P3041 核心:e500mc 接口類(lèi)型:I2C, SPI, USB 工作電源電壓:
MAXQ7667EVKIT-1# 功能描述:開(kāi)發(fā)板和工具包 - 其他處理器 MAXQ7667EVKIT-1# RoHS:否 制造商:Maxim Integrated 產(chǎn)品: 工具用于評(píng)估: 核心: 接口類(lèi)型: 工作電源電壓:
MAXQ7668AACM/V+ 功能描述:16位微控制器 - MCU Integrated Circuits (ICs) Embedded - Microcontrollers - ADC 12BIT 8CH SER 2.7V LQFP RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT
MAXQ7668AACM/V+T 功能描述:16位微控制器 - MCU Integrated Circuits (ICs) Embedded - Microcontrollers - ADC 12BIT 8CH SER 2.7V LQFP RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT
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