Datasheet

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FEATURES

D ±1°C REMOTE DIODE SENSOR

D ±1°C LOCAL TEMPERATURE SENSOR

D PROGRAMMABLE NON-IDEALITY FACTOR

D SERIES RESISTANCE CANCELLATION

D ALERT FUNCTION

D PROGRAMMABLE RESOLUTION: 9 to 12 Bits

D PROGRAMMABLE THRESHOLD LIMITS

D TWO-WIRE/SMBus SERIAL INTERFACE

D MINIMUM AND MAXIMUM TEMPERATURE

MONITORS

D MULTIPLE INTERFACE ADDRESSES

D ALERT/THERM2 PIN CONFIGURATION

D DIODE FAULT DETECTION

APPLICATIONS

D LCD/DLP/LCOS PROJECTORS

D SERVERS

D INDUSTRIAL CONTROLLERS

D CENTRAL OFFICE TELECOM EQUIPMENT

D DESKTOP AND NOTEBOOK COMPUTERS

D STORAGE AREA NETWORKS (SAN)

D INDUSTRIAL AND MEDICAL

EQUIPMENT

D PROCESSOR/FPGA

TEMPERATURE MONITORING

DESCRIPTION

The TMP411 is a remote temperature sensor monitor with

a built-in local temperature sensor. The remote

temperature sensor diode-connected transistors are

typically low-cost, NPN- or PNP-type transistors or diodes

that are an integral part of microcontrollers,

microprocessors, or FPGAs.

Remote accuracy is ±1°C for multiple IC manufacturers,

with no calibration needed. The Two-Wire serial interface

accepts SMBus write byte, read byte, send byte, and

receive byte commands to program the alarm thresholds

and to read temperature data.

Features that are included in the TMP411 are: series

resistance cancellation, programmable non-ideality factor,

programmable resolution, programmable threshold limits,

minimum and maximum temperature monitors, wide

remote temperature measurement range (up to +150°C),

diode fault detection, and temperature alert function.

The TMP411 is available in both MSOP-8 and SO-8

packages.

TMP411

SBOS383C − DECEMBER 2006 − REVISED MAY 2008

±1°C Remote and Local TEMPERATURE SENSOR

with N-Factor and Series Resistance Correction

         

          

 !     !   

www.ti.com

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.

DLP is a registered trademark of Texas Instruments. SMBus is a trademark of Intel Corp.

All other trademarks are the property of their respective owners.

Device ID Register

Manufacturer ID Register

THERM Hysteresis Register

Consecutive Alert

Configuration Register

Status Register

Conversion Rate

N−Factor

Correction

One−Shot

D+

Bus Interface Pointer Register

Resolution Register

Configuration Register

Local Temp Low Limit

Local THERM Limit

Local Temp High Limit

Remote Temp Low Limit

Remote THERM Limit

Remote Temp High Limit

Remote

Temperature

Local

Temperature

Comparators

Interrupt

Configuration

SCL

GND

THERM

ALERT/THERM2

V+

SDA

D−

TMP411

Remote Temperature Min/Max Register

Local Temperature Min/Max Register

Summary of content (32 pages)

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TMP411 SBOS383C − DECEMBER 2006 − REVISED MAY 2008 ±1°C Remote and Local TEMPERATURE SENSOR with N-Factor and Series Resistance Correction FEATURES DESCRIPTION D D D D D D D D D The TMP411 is a remote temperature sensor monitor with a built-in local temperature sensor. The remote temperature sensor diode-connected transistors are typically low-cost, NPN- or PNP-type transistors or diodes that are an integral part of microcontrollers, microprocessors, or FPGAs.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 ABSOLUTE MAXIMUM RATINGS(1) Power Supply, VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0V Input Voltage, pins 2, 3, 4 only . . . . . . . . . . . . . −0.5V to VS + 0.5V Input Voltage, pins 6, 7, 8 only . . . . . . . . . . . . . . . . . . . −0.5V to 7V Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA Operating Temperature Range . . . . . . . . . . . . . . .
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 ELECTRICAL CHARACTERISTICS At TA = −40°C to +125°C and VS = 2.7V to 5.5V, unless otherwise noted. TMP411 PARAMETERS TYP MAX UNITS TA = −40°C to +125°C TA = +15°C to +85°C, VS = 3.3V TA = +15°C to +75°C, TDIODE = −40°C to +150°C, VS = 3.3V TA = −40°C to +100°C, TDIODE = −40°C to +150°C, VS = 3.3V TA = −40°C to +125°C, TDIODE = −40°C to +150°C ±1.25 ±0.0625 ±0.0625 ±1 ±3 ±2.5 ±1 ±1 ±3 ±5 °C °C °C °C °C VS = 2.7V to 5.5V ±0.2 ±0.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 TYPICAL CHARACTERISTICS At TA = +25°C and VS = 5.0V, unless otherwise noted. LOCAL TEMPERATURE ERROR vs TMP411 AMBIENT TEMPERATURE REMOTE TEMPERATURE ERROR vs TMP411 AMBIENT TEMPERATURE 2 3.0 VS = 3.3V TDIODE = +25_C (temperature at remote diode) 30 Typical Units Shown η = 1.008 1 0 −1 −2 −3 −50 −25 2.0 1.0 0 −1.0 −2.0 −3.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 TYPICAL CHARACTERISTICS (continued) At TA = +25°C and VS = 5.0V, unless otherwise noted. TEMPERATURE ERROR vs POWER−SUPPLY NOISE FREQUENCY 25 500 Local 100mVPP Noise Remote 100mVPP Noise Local 250mVPP Noise Remote 250mVPP Noise 20 15 10 450 400 350 5 I Q (µA) Temperature Error (_C) QUIESCENT CURRENT vs CONVERSION RATE 0 −5 300 200 −10 150 −15 100 −20 50 −25 0 5 10 0 0.0625 15 VS = 5.5V 250 VS = 2.7V 0.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 temperatures. Additional thermal limits can be programmed into the TMP411 and used to trigger another flag (THERM) that can be used to initiate a system response to rising temperatures. APPLICATIONS INFORMATION The TMP411 is a dual-channel digital temperature sensor that combines a local die temperature measurement channel and a remote junction temperature measurement channel in a single MSOP-8 or SO-8 package.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 SERIES RESISTANCE CANCELLATION Series resistance in an application circuit that typically results from printed circuit board (PCB) trace resistance and remote line length (see Figure 11) is automatically cancelled by the TMP411, preventing what would otherwise result in a temperature offset. for ambient local temperatures ranging from −40°C to +125°C. Parameters in the Absolute Maximum Ratings table must be observed. Table 1.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 Table 2. Decimal Fraction Temperature Data Format (Local and Remote Temperature Low Bytes) REMOTE TEMPERATURE REGISTER LOW BYTE VALUE LOCAL TEMPERATURE REGISTER LOW BYTE VALUE 0.0625°C RESOLUTION TEMP (°C) STANDARD AND EXTENDED BINARY 0.0000 0000 0000 0.0625 0.1250 0.5°C RESOLUTION HEX STANDARD AND EXTENDED BINARY 00 0000 0000 0001 0000 10 0010 0000 20 0.1875 0011 0000 0.2500 0.3125 0.3750 0.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 Table 3.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 TEMPERATURE REGISTERS The TMP411 has four 8-bit registers that hold temperature measurement results. Both the local channel and the remote channel have a high byte register that contains the most significant bits (MSBs) of the temperature analog-to-digital converter (ADC) result and a low byte register that contains the least significant bits (LSBs) of the temperature ADC result.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 STATUS REGISTER The TMP411 has a Status Register to report the state of the temperature comparators. Table 4 shows the Status Register bits. The Status Register is read-only and is read by reading from pointer address 02h. The BUSY bit reads as ‘1’ if the ADC is making a conversion. It reads as ‘0’ if the ADC is not converting. The OPEN bit reads as ‘1’ if the remote transistor was detected as open since the last read of the Status Register.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 CONFIGURATION REGISTER The Configuration Register sets the temperature range, controls shutdown mode, and determines how the ALERT/THERM2 pin functions. The Configuration Register is set by writing to pointer address 09h and read by reading from pointer address 03h. The MASK bit (bit 7) enables or disables the ALERT pin output if AL/TH = 0. If AL/TH = 1 then the MASK bit has no effect.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 RESOLUTION REGISTER The RES1 and RES0 bits (resolution bits 1 and 0) of the Resolution Register set the resolution of the local temperature measurement channel. Remote temperature measurement channel resolution is not affected. Changing the local channel resolution also affects the conversion time and rate of the TMP411. The Resolution Register is set by writing to pointer address 1Ah and is read by reading from pointer address 1Ah.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 N-FACTOR CORRECTION REGISTER MINIMUM AND MAXIMUM REGISTERS The TMP411 allows for a different n-factor value to be used for converting remote channel measurements to temperature. The remote channel uses sequential current excitation to extract a differential VBE voltage measurement to determine the temperature of the remote transistor. Equation 1 relates this voltage and temperature.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 SOFTWARE RESET The TMP411 may be reset by writing any value to Pointer Register FCh. This restores the power-on reset state to all of the TMP411 registers as well as abort any conversion in process and clear the ALERT and THERM pins. The TMP411 also supports reset via the two-wire general call address (00000000). The TMP411 acknowledges the general call address and responds to the second byte.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 SERIAL INTERFACE READ/WRITE OPERATIONS The TMP411 operates only as a slave device on either the Two-Wire bus or the SMBus. Connections to either bus are made via the open-drain I/O lines, SDA and SCL. The SDA and SCL pins feature integrated spike suppression filters and Schmitt triggers to minimize the effects of input spikes and bus noise. The TMP411 supports the transmission protocol for fast (1kHz to 400kHz) and high-speed (1kHz to 3.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 TIMING DIAGRAMS The TMP411 is Two-Wire and SMBus-compatible. Figure 13 to Figure 17 describe the various operations on the TMP411. Bus definitions are given below. Parameters for Figure 13 are defined in Table 12. Bus Idle: Both SDA and SCL lines remain high. Start Data Transfer: A change in the state of the SDA line, from high to low, while the SCL line is high, defines a START condition. Each data transfer is initiated with a START condition.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 HIGH-SPEED MODE In order for the Two-Wire bus to operate at frequencies above 400kHz, the master device must issue a High-speed mode (Hs-mode) master code (00001XXX) as the first byte after a START condition to switch the bus to high-speed operation. The TMP411 will not acknowledge this byte, but will switch the input filters on SDA and SCL and the output filter on SDA to operate in Hs-mode, allowing transfers at up to 3.4MHz.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 SMBUS ALERT FUNCTION UNDER-VOLTAGE LOCKOUT The TMP411 supports the SMBus Alert function. When pin 6 is configured as an alert output, the ALERT pin of the TMP411 may be connected as an SMBus Alert signal. When a master detects an alert condition on the ALERT line, the master sends an SMBus Alert command (00011001) on the bus.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 REMOTE SENSING 3. Base resistance < 100Ω. The TMP411 is designed to be used with either discrete transistors or substrate transistors built into processor chips and ASICs. Either NPN or PNP transistors can be used, as long as the base-emitter junction is used as the remote temperature sense. Either a transistor or diode connection can also be used; see Figure 11. 4.
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" #$$ www.ti.com SBOS383C − DECEMBER 2006 − REVISED MAY 2008 LAYOUT CONSIDERATIONS Remote temperature sensing on the TMP411 measures very small voltages using very low currents; therefore, noise at the IC inputs must be minimized. Most applications using the TMP411 will have high digital content, with several clocks and logic level transitions creating a noisy environment. Layout should adhere to the following guidelines: 1. 2. 3. 4. 5.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 10-Jun-2014 LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device.
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PACKAGE MATERIALS INFORMATION www.ti.com 24-Apr-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TMP411ADGKR VSSOP DGK 8 2500 330.0 12.4 5.3 3.3 1.3 8.0 12.0 Q1 TMP411ADGKR VSSOP DGK 8 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 TMP411ADGKT VSSOP DGK 8 250 330.0 12.4 5.3 3.4 1.4 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 24-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TMP411ADGKR VSSOP DGK 8 2500 370.0 355.0 55.0 TMP411ADGKR VSSOP DGK 8 2500 366.0 364.0 50.0 TMP411ADGKT VSSOP DGK 8 250 366.0 364.0 50.0 TMP411ADR SOIC D 8 2500 367.0 367.0 35.0 TMP411BDGKR VSSOP DGK 8 2500 366.0 364.0 50.0 TMP411BDGKR VSSOP DGK 8 2500 370.0 355.0 55.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.