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TMP442 Folha de dados(PDF) 3 Page - Texas Instruments |
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TMP442 Folha de dados(HTML) 3 Page - Texas Instruments |
3 / 29 page ELECTRICAL CHARACTERISTICS TMP441 TMP442 www.ti.com .............................................................................................................................................. SBOS425A – DECEMBER 2008 – REVISED MARCH 2009 At TA = –40°C to +125°C and VS = 2.7V to 5.5V, unless otherwise noted. TMP441, TMP442 PARAMETER CONDITIONS MIN TYP MAX UNIT TEMPERATURE ERROR Local Temperature Sensor TELOCAL TA = –40°C to +125°C ±1.25 ±2.5 °C TA = 0°C to +100°C, VS = 3.3V ±0.25 ±1 °C Remote Temperature Sensor(1) TEREMOTE TA = 0°C to +100°C, TDIODE = –40°C to +150°C, VS = 3.3V ±0.25 ±1 °C TA = –40°C to +100°C, TDIODE = –40°C to +150°C, VS = 3.3V ±0.5 ±1.5 °C TA = –40°C to +125°C, TDIODE = –40°C to +150°C ±3 ±5 °C vs Supply (Local/Remote) VS = 2.7V to 5.5V 0.2 ±0.5 °C/V TEMPERATURE MEASUREMENT Conversion Time (per channel) Local Channel 12 15 17 ms Remote Channel M Beta Correction Enabled(2) RC = 1 97 126 137 ms RC = 0 36 47 52 ms M Beta Correction Disabled(3) RC = 1 72 93 100 ms RC = 0 33 44 47 ms Resolution Local Temperature Sensor 12 Bits Remote Temperature Sensor 12 Bits Remote Sensor Source Currents High Series resistance (beta correction)(4) 120 µA Medium High 60 µA Medium Low 12 µA Low 6 µA Remote Transistor Ideality Factor η TMP441/TMP442 optimized ideality factor 1.000(2) 1.008(3) Beta Correction Range β 0.1 27 SMBus INTERFACE Logic Input High Voltage (SCL, SDA) VIH 2.1 V Logic Input Low Voltage (SCL, SDA) VIL 0.8 V Hysteresis 500 mV SMBus Output Low Sink Current 6 mA SDA Output Low Voltage VOL IOUT = 6mA 0.15 0.4 V Logic Input Current 0 ≤ VIN ≤ 6V –1 +1 µA SMBus Input Capacitance (SCL, SDA) 3 pF SMBus Clock Frequency 3.4 MHz SMBus Timeout 25 32 35 ms SCL Falling Edge to SDA Valid Time 1 µs DIGITAL INPUTS Input Capacitance 3 pF Input Logic Levels Input High Voltage VIH 0.7(V+) (V+)+0.5 V Input Low Voltage VIL –0.5 0.3(V+) V Leakage Input Current IIN 0V ≤ VIN ≤ VS 1 µA (1) Tested with less than 5 Ω effective series resistance, 100pF differential input capacitance, and an ideal diode with η-factor = 1.008. T A is the ambient temperature of the TMP441/42. TDIODE is the temperature at the remote diode sensor. (2) Beta correction configuration set to '1000' and sensor is GND collector-connected (PNP collector to ground). (3) Beta correction configuration set to '0111' or sensor is diode-connected (base shorted to collector). (4) If beta correction is disabled ('0111'), then up to 1k Ω of series line resistance is cancelled; if beta correction is enabled ('1xxx'), up to 300 Ω is cancelled. Copyright © 2008–2009, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): TMP441 TMP442 |
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