Datasheet
LM73
SMBDAT
SMBCLK
ADDR
1
5
6
4
V
DD
= 2.7V to 5.5V
Typical bypass 0.1 PF
3
2
To hardware
shutdown
To / from processor
2-wire interface
Address (set as desired for one
of three addresses)
ALERT
LM73
www.ti.com
SNIS141D –OCTOBER 2005–REVISED MAY 2009
LM73 2.7V, SOT, 11-to-14 Bit Digital Temperature Sensor with 2-Wire Interface
Check for Samples: LM73
1
FEATURES
KEY SPECIFICATIONS
2
• Single Address Pin Offers Choice of Three
• Supply Voltage: 2.7V to 5.5V
Selectable Addresses per Version for a Total
• Supply Current:
of Six Possible Addresses.
– Operating:
• SMBus and I
2
C-Compatible Two-Wire Interface
– 320 µA (typ)
• Supports 400 kHz Operation
– 495 µA (max)
• Shutdown Mode with One-Shot Feature
– Shutdown:
Available for Very Low Average Power
– 8 µA (max)
Consumption
– 1.9 µA (typ)
• Programmable Digital Temperature Resolution
• Temperature Accuracy:
from 11 Bits to 14 Bits.
– -10°C to 80°C: ±1.0°C (max)
• Fast Conversion Rate Ideal for Quick Power
Up and Measuring Rapidly Changing – -25°C to 115°C: ±1.5°C (max)
Temperature
– -40°C to 150°C: ±2.0°C (max)
• Open-Drain ALERT Output Pin Goes Active
• Resolution: 0.25°C to 0.03125°C
When Temperature is Above a Programmed
• Conversion Time:
Temperature Limit
– 11-bit (0.25°C): 14 ms (max)
• Very Stable, Low-Noise Digital Output.
– 14-bit (0.03125°C): 112 ms (max)
• UL Recognized Component
DESCRIPTION
APPLICATIONS
The LM73 is an integrated, digital-output temperature
• Portable Electronics
sensor featuring an incremental Delta-Sigma ADC
with a two-wire interface that is compatible with the
• Notebook Computers
SMBus and I
2
C interfaces. The host can query the
• Automotive
LM73 at any time to read temperature.
• System Thermal Management
• Office Electronics
Typical Application
1
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PRODUCTION DATA information is current as of publication date.
Copyright © 2005–2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.