ADI公司的ADuC7060/ADuC7061均為完全集成的8 kSPS、24位數(shù)據(jù)采集系統(tǒng)，在單芯片上集成高性能多通道Σ-Δ型模數(shù)轉(zhuǎn)換器(ADC)、16位/32位ARM7TDMI® MCU和Flash/EE存儲(chǔ)器。器件的電源電壓為2.375 V至2.625 V，工作溫度范圍為−40°C至+125°C工業(yè)溫度范圍.主要用在工業(yè)自動(dòng)化和過程控制,智能精密檢測(cè)系統(tǒng)和4 mA至20 mA環(huán)路智能傳感器.本文介紹了ADuC7060/ADuC7061主要特性, 功能方框圖, 模擬方框圖以及單/雙電源連接圖, 橋接口, RTD接口和熱電偶接口電路圖.同時(shí)還介紹了基于USB且?guī)?a class="innerlink" href="http://ihrv.cn/tags/冷結(jié)補(bǔ)償" title="冷結(jié)補(bǔ)償" target="_blank">冷結(jié)補(bǔ)償的熱電偶溫度監(jiān)控器主要特性與電路圖,評(píng)估板電路圖和材料清單.
ADuC7060/ADuC7061均為完全集成的8 kSPS、24位數(shù)據(jù)采集系統(tǒng)，在單芯片上集成高性能多通道Σ-Δ型模數(shù)轉(zhuǎn)換器(ADC)、16位/32位ARM7TDMI® MCU和Flash/EE存儲(chǔ)器。ADC包括一個(gè)5通道主ADC和一個(gè)最多8通道輔助ADC，可在單端或差分輸入模式下工作。片上提供一個(gè)單通道緩沖電壓輸出DAC，通過編程可將DAC輸出范圍設(shè)置為兩種電壓范圍之一。
這些器件通過一個(gè)片內(nèi)振蕩器和鎖相環(huán)(PLL)產(chǎn)生最高達(dá)10.24 MHz的內(nèi)部高頻時(shí)鐘信號(hào)。微控制器內(nèi)核為ARM7TDMI，它是一個(gè)16位/32位RISC機(jī)器，峰值性能最高可達(dá)10 MIPS。片內(nèi)集成有4 KB SRAM和32 KB非易失性Flash/EE存儲(chǔ)器。ARM7TDMI內(nèi)核將所有存儲(chǔ)器和寄存器視為一個(gè)線性陣列。
ADuC7060/ADuC7061包含4個(gè)定時(shí)器。定時(shí)器1是喚醒定時(shí)器，能將器件從省電模式喚醒；定時(shí)器2可以配置為看門狗定時(shí)器。另外還提供一個(gè)具有6個(gè)輸出通道的16位PWM。ADuC7060/ADuC7061內(nèi)置一個(gè)高級(jí)中斷控制器。該矢量中斷控制器(VIC)可以為每個(gè)中斷分配一個(gè)優(yōu)先級(jí)。它還支持嵌套中斷，每個(gè)IRQ和FIQ最多允許8級(jí)嵌套。如果將IRQ和FIQ中斷源合并，則可以支持總計(jì)16級(jí)嵌套中斷。片內(nèi)出廠固件支持通過UART串行接口端口進(jìn)行在線連續(xù)下載，并且支持通過JTAG接口進(jìn)行非介入仿真。
這些器件的電源電壓為2.375 V至2.625 V，工作溫度范圍為−40℃至+125℃工業(yè)溫度范圍。
The ADuC706x series are fully integrated, 8 kSPS, 24-bit data acqui-sition systems incorporating high performance multichannel sigma-delta (Σ-Δ) analog-to-digital converters (ADCs), 16-bit/ 32-bit ARM7TDMI® MCU, and Flash/EE memory on a single chip.
The ADCs consist of a primary ADC with two differential pairs or four single-ended channels and an auxiliary ADC with up to seven channels. The ADCs operate in single-ended or differential input mode. A single-channel buffered voltage output DAC is available on chip. The DAC output range is programmable to one of four voltage ranges.
The devices operate from an on-chip oscillator and a PLL gene-rating an internal high frequency clock up to 10.24 MHz. The microcontroller core is an ARM7TDMI, 16-bit/32-bit RISC machine offering up to 10 MIPS peak performance; 4 kB of SRAM and 32 kB of nonvolatile Flash/EE memory are provided on chip. The ARM7TDMI core views all memory and registers as a single linear array.
The ADuC706x contains four timers. Timer1 is a wake-up timer with the ability to bring the part out of power saving mode. Timer2 is configurable as a watchdog timer. A 16-bit PWM with six output channels is also provided. The ADuC706x contains an advanced interrupt controller. The vectored interrupt controller (VIC) allows every interrupt to be assigned a priority level. It also supports nested interrupts to a maximum level of eight per IRQ and FIQ. When IRQ and FIQ interrupt sources are combined, a total of 16 nested interrupt levels is supported. On-chip factory firmware supports in-circuit serial download via the UART serial interface ports and nonintrusive emulation via the JTAG interface. The parts operate from 2.375 V to 2.625 V over an industrial temperature range of −40°C to +125°C.
ADuC7060/ADuC7061主要特性:
Analog input/output
Dual (24-bit) ADCs
Single-ended and differential inputs
Programmable ADC output rate (4 Hz to 8 kHz)
Programmable digital filters
Built-in system calibration
Low power operation mode
Primary (24-bit) ADC channel
2 differential pairs or 4 single-ended channels
PGA (1 to 512) input stage
Selectable input range: ±2.34 mV to ±1.2 V
30 nV rms noise
Auxiliary (24-bit) ADC: 4 differential pairs or 7 single-ended channels
On-chip precision reference (±10 ppm/°C)
Programmable sensor excitation current sources
200 μA to 2 mA current source range
Single 14-bit voltage output DAC
Microcontroller
ARM7TDMI core, 16-/32-bit RISC architecture
JTAG port supports code download and debug
Multiple clocking options
Memory
32 kB (16 kB × 16) Flash/EE memory, including 2 kB kernel
4 kB (1 kB × 32) SRAM
Tools
In-circuit download, JTAG based debug
Low cost, QuickStart™ development system
Communications interfaces
SPI interface (5 Mbps)
4-byte receive and transmit FIFOs
UART serial I/O and I2C (master/slave)
On-chip peripherals
4× general-purpose (capture) timers including
Wake-up timer
Watchdog timer
Vectored interrupt controller for FIQ and IRQ
8 priority levels for each interrupt type
Interrupt on edge or level external pin inputs
16-bit, 6-channel PWM
General-purpose inputs/outputs
Up to 14 GPIO pins that are fully 3.3 V compliant
Power
AVDD/DVDD specified for 2.5 V (±5%)
Active mode: 2.74 mA (@ 640 kHz, ADC0 active)
10 mA (@ 10.24 MHz, both ADCs active)
Packages and temperature range
Fully specified for −40℃ to +125℃ operation
32-lead LFCSP (5 mm × 5 mm)
48-lead LFCSP and LQFP
Derivatives
32-lead LFCSP (ADuC7061)
48-lead LQFP and 48-lead LFCSP (ADuC7060)
ADuC7060/ADuC7061應(yīng)用:
工業(yè)自動(dòng)化和過程控制
智能精密檢測(cè)系統(tǒng)，4 mA至20 mA環(huán)路智能傳感器
圖1.ADuC7060/ADuC7061功能方框圖
圖2.ADuC706x模擬方框圖
圖3.ADuC706x外接雙電源連接圖
圖4.ADuC706x外接單電源連接圖
圖5.ADuC706x橋接口電路圖
圖6.ADuC706x RTD接口電路圖
圖7.ADuC706x熱電偶接口電路圖
利用精密模擬微控制器ADuC7060/ADuC7061構(gòu)建 基于USB且?guī)Ю浣Y(jié)補(bǔ)償?shù)臒犭娕紲囟缺O(jiān)控器
本電路顯示如何在精密熱電偶溫度監(jiān)控應(yīng)用中使用精密模擬微控制器ADuC7060/ADuC7061。ADuC7060/ADuC7061集成雙通道24位Σ-Δ型ADC、雙通道可編程電流源、14位DAC、1.2 V內(nèi)部基準(zhǔn)電壓源、ARM7內(nèi)核、32 kB閃存、4 kB SRAM以及各種數(shù)字外設(shè)，例如UART、定時(shí)器、SPI和I2C接口等。
在本電路中，ADuC7060/ADuC7061連接到一個(gè)熱電偶和一個(gè)100 Ω Pt RTD。RTD用于執(zhí)行冷結(jié)補(bǔ)償。
在源代碼中，ADC采樣速率選擇100 Hz。當(dāng)ADC輸入PGA的增益配置為32時(shí)，ADuC7060/ADuC7061的無(wú)噪聲分辨率大于18位。
圖8.ADuC7060/ADuC7061用作溫度監(jiān)控控制器與熱電偶接口電路
圖9.本電路所用的EVAL-ADUC7061MKZ板外形圖
圖10. EVAL-ADUC7061MKZ板電路圖(1)
圖11. EVAL-ADUC7061MKZ板電路圖(2)
EVAL-ADUC7061MKZ板材料清單見:
詳情請(qǐng)見:
http://www.analog.com/static/imported-files/data_sheets/ADuC7060_7061.pdf
和
http://www.analog.com/static/imported-files/zh/circuit_notes/CN0214.pdf
