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ADT7461A Datasheet(PDF) 4 Page - Analog Devices

Part # ADT7461A
Description  짹1째C Temperature Monitor with Series Resistance Cancellation
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADT7461A Datasheet(HTML) 4 Page - Analog Devices

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ADT7461A
Rev. A | Page 4 of 24
SPECIFICATIONS
TA = −40°C to +125°C, VDD = 3 V to 3.6 V, unless otherwise noted.
Table 2.
Parameter
Min
Typ
Max
Unit
Test Conditions
POWER SUPPLY
Supply Voltage, VDD
3.0
3.30
3.6
V
Average Operating Supply Current, IDD
240
350
μA
0.0625 conversions/sec rate1
5
30
μA
Standby mode
Undervoltage Lockout Threshold
2.55
V
VDD input, disables ADC, rising edge
Power-On-Reset Threshold
1
2.5
V
TEMPERATURE-TO-DIGITAL CONVERTER
Local Sensor Accuracy
±1
°C
0°C ≤ TA ≤ +70°C
±1.5
°C
0°C ≤ TA ≤ +85°C
±2.5
°C
−40°C ≤ TA ≤ +100°C
Resolution
1
°C
Remote Diode Sensor Accuracy
±1
°C
0°C ≤ TA ≤ +70°C, −55°C ≤ TD2 ≤ +150°C
±1.5
°C
0°C ≤ TA ≤ +85°C, −55°C ≤ TD2 ≤ +150°C
±2.5
°C
−40°C ≤ TA ≤ +100°C, −55°C ≤ TD2 ≤ +150°C
Resolution
0.25
°C
Remote Sensor Source Current
220
μA
High level3
82
μA
Middle level3
13.5
μA
Low level3
Conversion Time
40
52
ms
From stop bit to conversion complete, one-shot mode with
averaging switched on
6
8
ms
One-shot mode with averaging off
(that is, conversion rate = 16-, 32-, or 64-conversions per
second)
Maximum Series Resistance Cancelled
1. 5
Resistance split evenly on both the D+ and D– inputs
OPEN-DRAIN DIGITAL OUTPUTS
(THERM, ALERT/THERM2)
Output Low Voltage, VOL
0.4
V
IOUT = −6.0 mA
High Level Output Leakage Current, IOH
0.1
1
μA
VOUT = VDD
SMBus INTERFACE3, 4
Logic Input High Voltage, VIH
2.1
V
3 V ≤ VDD ≤ 3.6 V
SCLK, SDATA
Logic Input Low Voltage, VIL
0.8
V
3 V ≤ VDD ≤ 3.6 V
SCLK, SDATA
Hysteresis
500
mV
SDA Output Low Voltage, VOL
0.4
V
IOUT = −6.0 mA
Logic Input Current, IIH, IIL
−1
+1
μA
SMBus Input Capacitance, SCLK, SDATA
5
pF
SMBus Clock Frequency
400
kHz
SMBus Timeout5
25
64
ms
User programmable
SCLK Falling Edge to SDATA Valid Time
1
μs
Master clocking in data
1 See Table 10 for information on other conversion rates.
2 Guaranteed by characterization, but not production tested.
3 Guaranteed by design, but not production tested.
4 See SMBus Timing Specifications section for more information.
5 Disabled by default. Detailed procedures to enable it are in the Serial Bus Interface section of this data sheet.


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