参数资料
型号: MAXQ7667AACM/V+
厂商: Maxim Integrated Products
文件页数: 11/40页
文件大小: 0K
描述: IC MCU-BASED DAS 16BIT 48-LQFP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 250
系列: MAXQ®
核心处理器: RISC
芯体尺寸: 16-位
速度: 16MHz
连通性: LIN,SPI,UART/USART
外围设备: 欠压检测/复位,POR,WDT
输入/输出数: 16
程序存储器容量: 32KB(16K x 16)
程序存储器类型: 闪存
RAM 容量: 2K x 16
电压 - 电源 (Vcc/Vdd): 2.25 V ~ 2.75 V
数据转换器: A/D 5x12b
振荡器型: 内部
工作温度: -40°C ~ 125°C
封装/外壳: 48-LQFP
包装: 托盘
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
相关PDF资料
PDF描述
DS80C390-QCR+ IC MPU CAN DUAL HS 68-PLCC
DS80C320-ENL+ IC MCU HI SPEED 33MHZ IND 44TQFP
221789-3 CONN JACK VERT SMA PCB GOLD
1408336-7 CONN PLUG QMA R/A CRIMP RG-58
DS5000FP-16+ IC MODULE MICRO 16MHZ 80-QFP
相关代理商/技术参数
参数描述
MAXQ7667EVKIT 功能描述:开发板和工具包 - 其他处理器 RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压:
MAXQ7667EVKIT+ 功能描述:开发板和工具包 - 其他处理器 MAXQ7667 Eval Kit RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压:
MAXQ7667EVKIT-1# 功能描述:开发板和工具包 - 其他处理器 MAXQ7667EVKIT-1# RoHS:否 制造商:Maxim Integrated 产品: 工具用于评估: 核心: 接口类型: 工作电源电压:
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 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格: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 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT