參數(shù)資料
型號: MAXQ7667AACM/V+T
廠商: Maxim Integrated Products
文件頁數(shù): 11/40頁
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/復(fù)位,POR,WDT
輸入/輸出數(shù): 16
程序存儲器容量: 32KB(16K x 16)
程序存儲器類型: 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
______________________________________________________________________________________
19
output to the FIFO automatically each time the lowpass
filter output updates, through the control of one of the
timer outputs, or through software. The device includes
a FIFO depth counter with programmable interrupt lev-
els and generates an interrupt if a FIFO overflow condi-
tion occurs. The output of the digital lowpass filter
connects to a digital comparator that can generate an
interrupt for a specified echo signal level.
Digital Comparator and Threshold Adjust
The digital comparator output asserts when the echo
amplitude at the output of the digital lowpass filter cross-
es a given threshold. The comparator’s threshold level,
hysteresis, and interrupt polarity are programmable.
SAR ADC
The MAXQ7667 incorporates a 12-bit unbuffered SAR
ADC with sample-and-hold and conversion rate up to
250ksps. The ADC allows measurements of tempera-
ture, battery voltage, or other parameters using five sin-
gle-ended or two fully differential analog inputs
(AIN0–AIN4). All of the analog inputs have a range of 0
to VREF in unipolar mode and ±VREF/2 in bipolar mode.
The SAR ADC supports three different conversion start
sources: timers, ADC control input (ADCCTL), and soft-
ware write. The conversion start source triggers the
ADC acquisition and conversion. The system clock pro-
vides the ADC clock frequency programmable to 1/2,
1/4, 1/8, or 1/16 of the system clock. Use internal
bandgap reference, external reference, or AVDD for
voltage reference of the SAR ADC. Figure 3 shows a
simplified block diagram of the SAR ADC.
The output of the SAR ADC is straight binary in unipolar
mode and two’s complement in bipolar mode. Figures 4
and 5 show the ADC transfer functions in unipolar
mode and bipolar mode.
000
001
002
003
004
FFC
FFB
FFD
FFE
FFF
01
2
3
4
FS
FS - 1.5 LSB
FULL-SCALE
TRANSITION
FS = REF
ZS = 0
1 LSB = REF/4096
OUTPUT
CODE
(hex)
DIFFERENTIAL INPUT VOLTAGE (LSB)
Figure 4. Unipolar Transfer Function
800
801
FFE
001
000
FFF
7FE
7FF
-FS
0
+FS
OUTPUT
CODE
(hex)
DIFFERENTIAL INPUT VOLTAGE (LSB)
+FS - 1.5 LSB
FULL-SCALE
TRANSITION
+FS = REF/2
ZS = 0
-FS = -REF/2
1 LSB = REF/4096
-FS + 0.5 LSB
Figure 5. Bipolar Transfer Function
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MAXQ7667EVKIT+ 功能描述:開發(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 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓:
MAXQ7667EVKIT-1# 功能描述:開發(fā)板和工具包 - 其他處理器 MAXQ7667EVKIT-1# RoHS:否 制造商:Maxim Integrated 產(chǎn)品: 工具用于評估: 核心: 接口類型: 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 最大時鐘頻率:24 MHz 程序存儲器大小: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 最大時鐘頻率:24 MHz 程序存儲器大小: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