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ADT7481

ADT7481首页预览图
型号: ADT7481
PDF文件:
  • ADT7481 PDF文件
  • ADT7481 PDF在线浏览
功能描述: Dual Channel Temperature Sensor and Overtemperature Alarm
PDF文件大小: 264.51 Kbytes
PDF页数: 共20页
制造商: ONSEMI[ON Semiconductor]
制造商LOGO: ONSEMI[ON Semiconductor] LOGO
制造商网址: http://www.onsemi.com
捡单宝ADT7481
PDF页面索引
120%
ADT7481
http://onsemi.com
4
ELECTRICAL CHARACTERISTICS (T
A
= 40°C to +120°C, 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
PowerOnReset Threshold 1.0 2.5 V
TemperatureTo Digital Converter
Local Sensor Accuracy (Note 2)
0°C T
A
+70°C
0°C T
A
+85°C
40 T
A
+100°C
±1
±1.5
±2.5
°C
Resolution 1.0 °C
Remote Diode Sensor Accuracy (Note 2) 0°C T
A
+70°C, 55°C T
D
(Note 3) +150°C
0°C T
A
+85°C, 55°C T
D
(Note 3) +150°C
40°C T
A
+100°C, 55°C T
D
(Note 3) +150°C
±1
±1.5
±2.5
°C
Resolution 0.25 °C
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)
oneshot mode with averaging switched on
73 94 ms
Oneshot mode with averaging off (conversion
rate = 16, 32, or 64 conversions per second)
11 14 ms
OpenDrain 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 6 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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