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LM95235QEIMM/NOPB +BOM

Automotive Grade, ±2°C Remote and Local Temperature Sensor with TruTherm Technology and SMBus

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

LM95235QEIMM/NOPB
Datasheet:

LM95235QEIMM/NOPB Datasheet (PDF)
Local sensor accuracy (max):

2
Type:

Remote
Operating temperature range (°C):

-40 to 85
Supply voltage (min) (V):

2.7
EDA/CAD Models:

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LM95235QEIMM/NOPB General Description

The LM95235 is an 11-bit digital temperature sensor with a 2-wire System Management Bus (SMBus) interface and TruTherm technology that can monitor the temperature of a remote diode as well as its own temperature. The LM95235 can be used to very accurately monitor the temperature of external devices such as microprocessors, graphics processors, or a diode-connected MMBT3904 transistor. For automotive applications the LM95235Q is available that is AEC-Q100 Grade3 compliant and is manufactured on an Automotive Grade Flow. TruTherm BJT (transistor) beta compensation technology allows the LM95235 to precisely monitor thermal diodes found in 90 nm and smaller geometry processes. LM95235 reports temperature in two different formats for +127.875°C/-128°C range and 0°C/255°C range. The LM95235 T_CRIT and OS outputs are asserted when either unmasked channel exceeds its programmed limit and can be used to shutdown the system, to turn on the system fans, or as a microcontroller interrupt function. The current status of the T_CRIT and OS pins can be read back from the status registers via the SMBus interface. All limits have a shared programmable hysteresis register.

The remote temperature channel of the LM95235 has a programmable digital filter. The LM95235 contains a diode model selection bit to select between a typical Intel® processor on a 65 nm or 90 nm process or MMBT3904, as well as an offset register for maximum flexibility and best accuracy.

The LM95235 has a three-level address pin to connect up to 3 devices to the same SMBus master, that is shared with the OS output. The LM95235 has a programmable conversion rate register and a standby mode to save power. One conversion can be triggered in standby mode by writing to the one-shot register.

Key Features

Remote and Local Temperature Channels
TruTherm BJT Beta Compensation Technology
LM95235Q is AEC-Q100 Grade 3 Compliant and is Manufactured on an Automotive Grade Flow
Diode Model Selection Bit - MMBT3904 or 65/90-nm Processor Diodes
Two Formats: -128°C to 127.875°C and 0°C to 255.875°C
Digital Filter for Remote Channel
Programmable TCRIT and OS Thresholds
Programmable Shared Hysteresis Register
Diode Fault Detection
Mask, Offset, and Status Registers
SMBus 2.0 Compatible Interface, Supports TIMEOUT
Programmable Conversion Rate for Best Power Consumption
Three-Level Address Pin
Standby Mode One-Shot Conversion Control
Pin-for-Pin Compatible With the LM86 and LM89
8-Pin VSSOP Package

Key Specifications

Supply Voltage 3.0 to 3.6 V
Supply Current, Conv. Rate = 1 Hz 350 µA (typ)
Remote Diode Temperature Accuracy
- T_A = 25°C to 85°C; T_D = 60°C to 100°C, ±0.75 °C (max)
- T_A = 25°C to 90°C; T_D = 40°C to 125°C, ±1.5 °C (max)
Local Temperature Accuracy
- T_A = 25°C to 100°C, ±2.0 °C (max)
Conversion Rate, Both Channels 16 to 0.4 Hz

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Specifications

Local sensor accuracy (max)	2	Type	Remote
Operating temperature range (°C)	-40 to 85	Supply voltage (min) (V)	2.7
Interface type	I2C, SMBus	Supply voltage (max) (V)	5.5
Features	ALERT, One-shot conversion	Supply current (max) (µA)	350
Temp resolution (max) (Bits)	11	Remote channels (#)	1
Addresses	3	Rating	Automotive
Product Category:	Board Mount Temperature Sensors	Output Type:	Digital
Configuration:	Local, Remote	Accuracy:	+/- 2 C
Supply Voltage - Min:	3 V	Supply Voltage - Max:	3.6 V
Interface Type:	2-Wire, I2C, SMBus	Resolution:	11 bit
Minimum Operating Temperature:	- 40 C	Maximum Operating Temperature:	+ 85 C
Shutdown:	Shutdown	Mounting Style:	SMD/SMT
Qualification:	AEC-Q100	Packaging:	MouseReel
Operating Supply Current:	350 uA	Output Current:	10 uA
Product:	Temperature Sensors	Product Type:	Temperature Sensor ICs
Series:	LM95235-Q1	Factory Pack Quantity:	1000
Subcategory:	Sensors	Type:	Temperature Sensor
Unit Weight:	0.001101 oz