ADT7461A Datasheet, PDF (4/19 Pages) Analog Devices – ±1°C Temperature Monitor with Series Resistance Cancellation

ADT7461A
ELECTRICAL CHARACTERISTICS T_A = −40°C to +125°C, V_DD = 3.0 V to 3.6 V, unless otherwise noted.
Parameter
Power Supply
Conditions
Min Typ
Supply Voltage, V_DD
Average Operating Supply Current, I_DD
0.0625 Conversions/Sec Rate (Note 1)
Standby mode
3.0 3.30
−
240
5.0
Undervoltage Lockout Threshold
Power−On−Reset Threshold
V_DD input, disables ADC, rising edge
−
2.55
1.0
−
Temperature−To−Digital Converter
Local Sensor Accuracy
Resolution
0°C ≤ T_A ≤ +70°C
0°C ≤ T_A ≤ +85°C
−40°C ≤ T_A ≤ +100°C
−
−
−
1.0
Remote Diode Sensor Accuracy
Resolution
0°C ≤ T_A ≤ +70°C, −55°C ≤ T_D (Note 2) ≤ +150°C
−
−
0°C ≤ T_A ≤ +85°C, −55°C ≤ T_D (Note 2) ≤ +150°C
−40°C ≤ T_A ≤ +100°C, −55°C ≤ T_D (Note 2) ≤ +150°C
−
0.25
Remote Sensor Source Current
High level (Note 3)
Middle level (Note 3)
Low level (Note 3)
−
220
82
13.5
Conversion Time
From stop bit to conversion complete, one−shot
mode with averaging switched on
−
40
One−shot mode with averaging off (that is, conversion
−
6.0
rate = 16−, 32−, or 64−conversions per second)
Maximum Series Resistance Cancelled
Resistance split evenly on both the D+ and D– inputs
−
1.5
Open−Drain Digital Outputs (THERM, ALERT/THERM2)
Output Low Voltage, V_OL
High Level Output Leakage Current, I_OH
SMBus Interface (Note 3 and 4)
I_OUT = −6.0 mA
V_OUT = V_DD
−
−
−
0.1
Logic Input High Voltage, V_IH SCLK, SDATA
Logic Input Low Voltage, V_IL SCLK, SDATA
Hysteresis
3.0 V ≤ V_DD ≤ 3.6 V
3.0 V ≤ V_DD ≤ 3.6 V
2.1
−
−
−
−
500
SDA Output Low Voltage, V_OL
Logic Input Current, I_IH, I_IL
SMBus Input Capacitance, SCLK, SDATA
−
−
−1.0
−
−
5.0
SMBus Clock Frequency
−
−
SMBus Timeout (Note 5)
User programmable
−
25
SCLK Falling Edge to SDATA Valid Time
Master clocking in data
−
−
1. See Table 5 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 the datasheet.
Max Unit
3.6
V
350 mA
30
−
V
2.5
V
±1.0 °C
±1.5
±2.5
−
°C
±1.0 °C
±1.5
±2.5
−
°C
−
mA
52 ms
8.0 ms
−
kW
0.4
V
1.0 mA
−
V
0.8
V
−
mV
0.4 mA
+1.0 mA
−
pF
400 kHz
64 ms
1.0 ms
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