Datasheet > FT232R

FT232R

更新时间： 2024-11-21 12:29:19

品牌	Logo	应用领域
亚德诺 - ADI		微控制器监控
页数	文件大小	规格书
5页	373K
描述
USB-Based Temperature Monitor Using the ADuCM360 Precision Analog Microcontroller

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Circuit Note

CN-0221

Devices Connected/Referenced

Circuits from the Lab™ reference circuits are engineered and

tested for quick and easy system integration to help solve today’s

analog, mixed-signal, and RF design challenges. For more

information and/or support, visit www.analog.com/CN0221.

ADuCM360/

ADuCM361

Cortex-M3 Based Microcontroller with

Dual 24-Bit Σ-Δ ADCs

ADP1720-3.3 Low Dropout Linear Regulator

USB-Based Temperature Monitor Using the ADuCM360 Precision Analog

Microcontroller and an External Thermocouple

converter (DAC), and a 1.2 V internal reference, as well as an ARM

Cortex-M3 core, 126 kB flash, 8 kB SRAM, and various digital

peripherals such as UART, timers, SPIs, and I²C interfaces.

EVALUATION AND DESIGN SUPPORT

Circuit Evaluation Board

CN-0221 Evaluation Board (EVAL-ADuCM360TCZ)

Design and Integration Files

Schematics, Layout Files, Bill of Materials, source code for

ADuCM360

In the circuit, the ADuCM360/ADuCM361 is connected to a

thermocouple and a 100 Ω platinum resistance temperature

detector (RTD). The RTD is used for cold junction compensation.

In the source code, an ADC sampling rate of 4 Hz is chosen. When

the ADC input programmable gain amplifier (PGA) is configured

for a gain of 32, the noise-free code resolution of the ADuCM360/

ADuCM361 is greater than 18 bits.

CIRCUIT FUNCTION AND BENEFITS

This circuit uses the ADuCM360/ADuCM361 precision analog

microcontroller in an accurate thermocouple temperature

monitoring application. The ADuCM360/ADuCM361 integrates

dual 24-bit sigma-delta (Σ-Δ) analog-to-digital converters (ADCs),

dual programmable current sources, a 12-bit digital-to-analog

3.3V

USB HEADER

ADP1720-3.3

BEAD

10Ω

OUT

GND

4.7µF

10µF

0.1µF

TxD

D–

D+

FT232R

RxD

AVDD

IOVDD

GND

AIN5/IEXC

RESET

SHIELD

10Ω

RESET

0.1µF

BEAD

100

PtRTD

Ω

P2.2/BM

AIN0

AIN1

0.01µF

10Ω

0.01µF

ADuCM360

FERRITE BEADS:

1kΩ @ 100MHz

TAIYO YUDEN

BK2125HS102-T

–

REF

5.6k

0.1%

Ω

REF

AIN2

AIN3

THERMOCOUPLE

JUNCTION

AIN7/VBIAS

AGND

TxD

RxD

Figure 1. ADuCM360/ADuCM361 as a Temperature Monitor Controller with a Thermocouple Interface (Simplified Schematic, All Connections Not Shown)

Rev. 0

Circuits from the Lab™ circuits from Analog Devices have been designed and built by Analog Devices

engineers. Standard engineering practices have been employed in the design and construction of

each circuit, andtheir function andperformance have been tested and verifiedin a lab environment at

room temperature. However, you are solely responsible for testing the circuit and determining its

suitability and applicability for your use and application. Accordingly, in noevent shall Analog Devices

be liable for direct, indirect, special, incidental, consequential or punitive damages due to any cause

whatsoever connectedtothe use ofanyCircuitsfromtheLabcircuits. (Continuedon last page)

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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