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參數(shù)資料
| 型號(hào)： | ADT7463ARQ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | dB COOL Remote Thermal Controller and Voltage Monitor |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO24 |
| 封裝： | MO-137AE, QSOP-24 |
| 文件頁(yè)數(shù)： | 12/53頁(yè) |
| 文件大小： | 719K |
| 代理商： | ADT7463ARQ |
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REV. 0
–12–
ADT7463
VOLTAGE MEASUREMENT INPUTS
The ADT7463 has four external voltage measurement channels.
It can also measure its own supply voltage, V
CC
.
Pins 20 to 23 are dedicated to measuring 5 V, 12 V, and 2.5 V
supplies and the processor core voltage V
CCP
(0 V to 3 V input).
The V
CC
supply voltage measurement is carried out through the
V
CC
pin (Pin 4). Setting Bit 7 of Configuration Register 1 (Reg.
0x40) allows a 5 V supply to power the ADT7463 and be mea-
sured without overranging the V
CC
measurement channel. The
2.5 V input can be used to monitor a chipset supply voltage in
computer systems.
ANALOG-TO-DIGITAL CONVERTER
All analog inputs are multiplexed into the on-chip, successive-
approximation, analog-to-digital converter. This has a resolu-
tion of 10 bits. The basic input range is 0 V to 2.25 V, but the
inputs have built-in attenuators to allow measurement of 2.5 V,
3.3 V, 5 V, 12 V and the processor core voltage V
CCP
without
any external components. To allow for the tolerance of these
supply voltages, the ADC produces an output of 3/4 full scale
(decimal 768 or 300 hex) for the nominal input voltage, and so
has adequate headroom to cope with overvoltages.
INPUT CIRCUITRY
The internal structure for the analog inputs is shown in Figure 13.
Each input circuit consists of an input protection diode, an attenu-
ator, plus a capacitor to form a first-order low-pass filter that gives
the input immunity to high frequency noise.
VOLTAGE MEASUREMENT REGISTERS
Reg. 0x20
2.5 V Reading
= 0x00 default
Reg. 0x21
V
CCP
Reading
= 0x00 default
Reg. 0x22
V
CC
Reading
= 0x00 default
Reg. 0x23
5 V Reading
= 0x00 default
Reg. 0x24
12 V Reading
= 0x00 default
VOLTAGE MEASUREMENT LIMIT REGISTERS
Associated with each voltage measurement channel are high and
low limit registers. Exceeding the programmed high or low limit
causes the appropriate Status bit to be set. Exceeding either
limit can also generate
SMBALERT
interrupts.
Reg. 0x44
2.5 V Low Limit
= 0x00 default
Reg. 0x45
2.5 V High Limit
= 0xFF default
Reg. 0x46
V
CCP
Low Limit
= 0x00 default
Reg. 0x47
V
CCP
High Limit
= 0xFF default
Reg. 0x48
V
CC
Low Limit
= 0x00 default
Reg. 0x49
V
CC
High Limit
= 0xFF default
Reg. 0x4A
5 V Low Limit
= 0x00 default
Reg. 0x4B
5 V High Limit
= 0xFF default
Reg. 0x4C
12 V Low Limit
= 0x00 default
Reg. 0x4D
12 V High Limit
= 0xFF default
30pF
120k
30pF
93k
MUX
30pF
68k
30pF
45k
52.5k
35pF
17.5k
94k
71k
47k
20k
12V
IN
5V
IN
3.3V
IN
2.5V
IN
V
CCPIN
Figure 13. Structure of Analog Inputs
Table II shows the input ranges of the analog inputs and output
codes of the 10-bit ADC.
When the ADC is running, it samples and converts a voltage
input in 711
μ
s and averages 16 conversions to reduce noise; a
measurement on each input takes nominally 11.38 ms.
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| ADT7463ARQ-REEL | 功能描述:IC SENSOR TEMP FAN-CTRL 24QSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱管理 系列:dBCool® 標(biāo)準(zhǔn)包裝:1 系列:- 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應(yīng)溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠(yuǎn)程（最大值） 拓?fù)?ADC，比較器，寄存器庫(kù) 輸出類型:2 線 SMBus? 輸出警報(bào):無(wú) 輸出風(fēng)扇:無(wú) 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 供應(yīng)商設(shè)備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
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| ADT7463ARQZ | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 SYS MGMT CNTRLR IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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| ADT7463ARQZ-REEL | 功能描述:板上安裝溫度傳感器 SYS MGMT CNTRLR IC RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
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