Datasheet

"#$%
SBOS371A − AUGUST 2006 − REVISED OCTOBER 2007
www.ti.com
3
ELECTRICAL CHARACTERISTICS: V
S
= 3V to 5.5V
At T
A
= −40°C to +125°C, and V
S
= 3V to 5.5V, unless otherwise noted.
TMP401
PARAMETER CONDITION
MIN TYP MAX
UNITS
TEMPERATURE ERROR
Local Temperature Sensor TE
LOCAL
T
A
= −40°C to +125°C ±1 ±3 °C
Remote Temperature Sensor
(1)
TE
REMOTE
T
A
= +15°C to +75°C, T
D
= −40°C to +150°C, V
S
= 3.3V ±1 °C
T
A
= −40°C to +100°C, T
D
= −40°C to +150°C, V
S
= 3.3V ±3 °C
T
A
= −40°C to +125°C, T
D
= −40°C to +150°C ±5 °C
vs Supply
Local/Remote V
S
= 3V to 5.5V ±0.2 ±0.5 °C/V
TEMPERATURE MEASUREMENT
Conversion Time (per channel) One Shot Mode 115 ms
Resolution
Local Temperature Sensor (programmable) 9 12 Bits
Remote Temperature Sensor 12 Bits
Remote Sensor Source Currents
High Series Resistance 3kΩ Max 120 µA
Medium High 60 µA
Medium Low 12 µA
Low 6 µA
Remote Transistor Ideality Factor η TMP401 Optimized Ideality Factor 1.008
SMBus INTERFACE
Logic Input High Voltage (SCL, SDA) V
IH
2.1 V
Logic Input Low Voltage (SCL, SDA) V
IL
0.8 V
Hysteresis 500 mV
SMBus Output Low Sink Current 6 mA
Logic Input Current −1 +1 µA
SMBus Input Capacitance (SCL, SDA) 3 pF
SMBus Clock Frequency 3.4 MHz
SMBus Timeout 30 35 ms
SCL Falling Edge to SDA Valid Time 1 µs
DIGITAL OUTPUTS
Output Low Voltage V
OL
I
OUT
= 6mA 0.15 0.4 V
High-Level Output Leakage Current I
OH
V
OUT
= V
S
0.1 1 µA
ALERT/THERM2 Output Low Sink Current ALERT/THERM2 Forced to 0.4V 6 mA
THERM Output Low Sink Current THERM Forced to 0.4V 6 mA
POWER SUPPLY
Specified Voltage Range V
S
3 5.5 V
Quiescent Current I
Q
0.0625 Conversions per Second 25 30 µA
8 Conversions per Second 350 425 µA
Serial Bus Inactive, Shutdown Mode 3 10 µA
Serial Bus Active, f
S
= 400kHz, Shutdown Mode 90 µA
Serial Bus Active, f
S
= 3.4MHz, Shutdown Mode 350 µA
Power-On Reset Threshold POR 1.6 2.5 V
TEMPERATURE RANGE
Specified Range −40 +125 °C
Storage Range −60 +130 °C
Thermal Resistance q
JA
MSOP-8 150 °C/W
(1)
Tested with less than 5Ω effective series resistance and 100pF differential input capacitance.