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| 型號： | MAXQ7670EVKIT+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 11/38頁 |
| 文件大?。?/td> | 0K |
| 描述： | KIT EVAL FOR MAXQ7670 |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | MAXQ® |
| 類型： | MCU |
| 適用于相關(guān)產(chǎn)品： | MAXQ7670 |
| 所含物品： | 板 |
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MAXQ7670
Microcontroller with 10-Bit ADC,
PGA, 64KB Flash, and CAN Interface
______________________________________________________________________________________
19
The MAXQ7670 ADC uses a fully differential SAR con-
version technique and an integrated T/H (track and
hold) block to convert voltage signals into a 10-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 MAXQ7670 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 10-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 10-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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| EBC26DRYI | CONN EDGECARD 52POS DIP .100 SLD |
| SCRH6D28-100 | INDUCTOR SMD 10UH 1.70A 10KHZ |
| EEC43DRTS | CONN EDGECARD 86POS DIP .100 SLD |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAXQ7670EVKIT+ | 功能描述:開發(fā)板和工具包 - 其他處理器 MAXQ7670 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: |
| MAXQ8913 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:16-Bit, Mixed-Signal Microcontroller with Op Amps, ADC, and DACs for All-in-One Servo Loop Control |
| MAXQ8913EWG+T | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:16-Bit, Mixed-Signal Microcontroller with Op Amps, ADC, and DACs for All-in-One Servo Loop Control |
| MAXQ8913EWG-T&R+ | 制造商:Maxim Integrated Products 功能描述:MAXQ8913 IMAGE STABILIZER WLF T&R - Gel-pak, waffle pack, wafer, diced wafer on film |
| MAXQ8913X-0000+ | 功能描述:16位微控制器 - MCU 16-Bit Mxd Sgnl MCU w/Op Amp ADC & DAC 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 |
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