参数资料
型号: ADT7481ARMZ-R7
厂商: ON Semiconductor
文件页数: 4/20页
文件大小: 237K
描述: IC TEMP SENSOR 2CH ALARM 10MSOP
产品变化通告: MFG CHG Notification ADI to ON Semi
Product Discontinuation 30/Sept/2011
标准包装: 1,000
功能: 温度监控系统(传感器)
传感器类型: 内部和外部
感应温度: -40°C ~ 120°C,外部传感器
精确度: ±2.5°C(最小值)
拓扑: ADC,比较器,多路复用器,寄存器库
输出类型: SMBus?
输出警报:
输出风扇:
电源电压: 3 V ~ 3.6 V
工作温度: -40°C ~ 120°C
安装类型: 表面贴装
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
供应商设备封装: 10-MSOP
包装: 带卷 (TR)
ADT7481
http://onsemi.com
4
Table 5. ELECTRICAL CHARACTERISTICS (T
A
= 40癈 to +120癈, V
DD
= 3.0 V to 3.6 V, unless otherwise noted)
Parameter
Conditions
Min
Typ
Max
Unit
Power Supply
Supply Voltage, V
DD
3.0
3.30
3.6
V
Average Operating Supply Current, I
DD
0.0625 Conversions/Sec Rate (Note 1)

3.0
4.0
mA
Standby Mode

5.0
30
mA
Undervoltage Lockout Threshold
V
DD
 Input, Disables ADC, Rising Edge

2.55

V
Power-On-Reset Threshold
1.0

2.5
V
Temperature-to-Digital Converter
Local Sensor Accuracy (Note 2)
0癈 d T
A
 d +70癈
0癈 d T
A
 d +85癈
40 d T
A
 d +100癈






?
?.5
?.5
Resolution

1.0

Remote Diode Sensor Accuracy (Note 2)
0癈 d T
A
 d +70癈, 55癈 d T
D
 (Note 3) d +150癈
0癈 d T
A
 d +85癈, 55癈 d T
D
 (Note 3) d +150癈
40癈 d T
A
 d +100癈, 55癈 d T
D
 (Note 3) d +150癈






?
?.5
?.5
Resolution

0.25

Remote Sensor Source Current
High Level (Note 4)

233

mA
Low Level (Note 4)

14

mA
Conversion Time
From Stop Bit to Conversion Complete (Both
Channels) One-shot Mode with Averaging
Switched On

73
94
ms
One-shot Mode with Averaging Off
(Conversion Rate = 16, 32, or 64 Conversions
per Second)

11
14
ms
Open-Drain Digital Outputs (THERM
, ALERT
/THERM2
)
Output Low Voltage, V
OL
I
OUT
 = 6.0 mA


0.4
V
High Level Output Leakage Current, I
OH
V
OUT
 = V
DD

0.1
1.0
mA
SMBus Interface (Notes 4 and 5)
Logic Input High Voltage, V
IH
SCLK, SDATA
2.1


V
Logic Input Low Voltage, V
IL
SCLK, SDATA


0.8
V
Hysteresis

500

mV
SDA Output Low Voltage, V
OL
I
OUT
 = 6.0 mA


0.4
V
Logic Input Current, I
IH
, I
IL
1.0

+1.0
mA
SMBus Input Capacitance,
SCLK, SDATA

5.0

pF
SMBus Clock Frequency


400
kHz
SMBus Timeout (Note 6)
User Programmable

25
32
ms
SCLK Falling Edge to SDATA Valid Time
Master Clocking in Data


1.0
ms
1.  See Table 11 for information on other conversion rates.
2.  Averaging enabled.
3.  Guaranteed by characterization, not production tested.
4.  Guaranteed by design, not production tested.
5.  See Timing Specifications section for more information.
6.  Disabled by default. See the Serial Bus Interface section for details to enable it.
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