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| 型号： | MAXQ7670AATL/V+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/38页 |
| 文件大小： | 0K |
| 描述： | IC MCU W/12BIT ADC 40TQFN-EP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 系列： | MAXQ® |
| 核心处理器： | RISC |
| 芯体尺寸： | 16-位 |
| 速度： | 16MHz |
| 连通性： | CAN，SPI |
| 外围设备： | 欠压检测/复位，POR，PWM，WDT |
| 输入/输出数： | 7 |
| 程序存储器容量： | 64KB（32K x 16） |
| 程序存储器类型： | 闪存 |
| RAM 容量： | 1K x 16 |
| 电压 - 电源 (Vcc/Vdd)： | 2.25 V ~ 3.6 V |
| 数据转换器： | A/D 8x12b |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
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MAXQ7670A
Microcontroller with 12-Bit ADC,
PGA, 64KB Flash, and CAN Interface
______________________________________________________________________________________
19
The MAXQ7670A ADC uses a fully differential SAR con-
version technique and an integrated T/H (track and
hold) block to convert voltage signals into a 12-bit digi-
tal result. Both single-ended and differential configura-
tions are implemented using an analog input channel
multiplexer that supports 8 single-ended or 4 differen-
tial channels.
In single-ended mode, the mux selects from either of
the ground-referenced analog inputs AIN0–AIN7. In dif-
ferential input configuration, analog inputs are selected
from the following pairs: AIN0/AIN1, AIN2/AIN3,
AIN4/AIN5, and AIN6/AIN7. Table 1 shows the single-
ended and differential input configurations possible for
the ADC mux.
Analog Input Track and Hold
A SAR conversion in the MAXQ7670A has different T/H
cycles depending on whether a gain of 1 (bypass) or a
gain of 16 (PGA enabled) is selected.
Gain = 1V/V
In gain = 1V/V, the conversion has a two-stage T/H
cycle. In track mode, a positive input capacitor con-
nects to the signal channel. A negative input capacitor
connects to the reference channel. After the T/H enters
hold mode, the difference between the signal and the
reference channel is converted to a 12-bit value. This
two-stage cycle takes 16 SARCLKs to complete.
Gain = 16V/V
In gain = 16V/V, the conversion has a three-stage T/H
cycle: amplification, ADC track, and ADC hold. First,
the PGA tracks the selected input and reference sig-
nals. The PGA amplifies the difference between the two
signals and holds the result for the next stage, ADC
track. The ADC tracks and converts the PGA result into
a 12-bit value. The SAR operation itself does not
change irrespective of the chosen gain. This three-
stage cycle takes 26.5 SARCLKs to complete. Figure 5
shows the conversion timing differences between gain
= 1V/V and gain = 16V/V.
SAR CHANNEL
SELECT
(REGISTER
ACNT[14:11])
SIGNAL CHANNEL
INTO ADC
REFERENCE
CHANNEL INTO
ADC
MEASUREMENT TYPE
0000
AIN0
AGND
Single-ended measurement on AIN0
0001
AIN1
AGND
Single-ended measurement on AIN1
0010
AIN2
AGND
Single-ended measurement on AIN2
0011
AIN3
AGND
Single-ended measurement on AIN3
0100
AIN4
AGND
Single-ended measurement on AIN4
0101
AIN5
AGND
Single-ended measurement on AIN5
0110
AIN6
AGND
Single-ended measurement on AIN6
0111
AIN7
AGND
Single-ended measurement on AIN7
1000
—
Reserved
1001
—
Reserved
1010
AIN0
AIN1
AIN0/AIN1
1011
AIN2
AIN3
AIN2/AIN3
1100
AIN4
AIN5
AIN4/AIN5
1101
AIN6
AIN7
AIN6/AIN7
1110
—
Reserved
1111
—
VCIM differential zero offset trim
Table 1. ADC Mux Input Configurations
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| MAXQ7670ATL/V+ | 功能描述:16位微控制器 - MCU MCU w/12-Bit ADC PGA 64KB Flash & CAN Int 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 |
| MAXQ7670ATL/V+T | 功能描述:16位微控制器 - MCU MCU w/12-Bit ADC PGA 64KB Flash & CAN Int 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 |
| MAXQ7670ATL+ | 功能描述:16位微控制器 - MCU MCU w/12-Bit ADC PGA 64KB Flash & CAN Int 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 |
| MAXQ7670ATL+T | 功能描述:16位微控制器 - MCU MCU w/12-Bit ADC PGA 64KB Flash & CAN Int 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 |
| MAXQ7670EVKIT+ | 功能描述:开发板和工具包 - 其他处理器 MAXQ7670 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: |
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