|
|
PDF TMP401 Data sheet ( Hoja de datos )
| Número de pieza | TMP401 | |
| Descripción | Digital Out TEMPERATURE SENSOR | |
| Fabricantes | Burr-Brown | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de TMP401 (archivo pdf) en la parte inferior de esta página. Total 24 Páginas | ||
|
No Preview Available !
www.DataSheet4U.com
TMP401
SBOS371 − AUGUST 2006
+15C Programmable, Remote/Local, Digital Out
TEMPERATURE SENSOR
FEATURES
D ±1°C REMOTE DIODE SENSOR
D ±3°C LOCAL TEMPERATURE SENSOR
D SERIES RESISTANCE CANCELLATION
D THERM FLAG OUTPUT
D ALERT/THERM2 FLAG OUTPUT
D PROGRAMMABLE OVER/UNDER
TEMPERATURE LIMITS
D PROGRAMMABLE RESOLUTION: 9- to 12-Bit
D DIODE FAULT DETECTION
D SMBus SERIAL INTERFACE
APPLICATIONS
D LCD/DLPE/LCOS PROJECTORS
D SERVERS
D INDUSTRIAL CONTROLLERS
D CENTRAL OFFICE TELECOM EQUIPMENT
D DESKTOP AND NOTEBOOK COMPUTERS
D STORAGE AREA NETWORKS
DESCRIPTION
The TMP401 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 alarm thresholds and
to read temperature data.
Features included in the TMP401 are series resistance
cancellation, wide remote temperature measurement
range (up to +150°C), diode fault detection, and
temperature alert functions.
V+
GND
1
5
V+
TMP401
D+ 2
3
D−
SCL
SDA
8
7
One− Shot
Start Register
Local
Temperature
Register
Conversion Rate
Register
Remote
Temperature
Register
Interrupt
Configuration
Consecutive Alert
Configuration Register
Status Register
Remote Temp High Limit
Remote THERM Limit
Remote Temp Low Limit
TL THERM Hysteresis Register
Local Temp High Limit
Temperature
Comparators
TR
Local THERM Limit
Local Temp Low Limit
Manufacturer ID Register
Device ID Register
Configuration Register
Resolution Register
Bus Interface
Pointer Register
4
THERM
6
ALERT/THERM2
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 trademark of Texas Instruments. All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright 2006, Texas Instruments Incorporated
www.ti.com
1 page  
www.ti.com
TYPICAL CHARACTERISTICS (continued)
At TA = +25°C and VS = 5.0V, unless otherwise noted.
25
20
15
10
5
0
−5
−10
−15
−20
−25
0
TEMPERATURE ERROR
vs POWER−SUPPLY NOISE FREQUENCY
Local 100mVPP Noise
Remote 100mVPP Noise
Local 250mVPP Noise
Remote 250mVPP Noise
5 10
Frequency (MHz)
Figure 7
15
500
450
400
350
300
250
200
150
100
50
0
1k
SHUTDOWN QUIESCENT CURRENT
vs SCL CLOCK FREQUENCY
VS = 5.5V
VS = 3.3V
10k 100k 1M
SCL CLock Frequency (Hz)
Figure 9
10M
TMP401
SBOS371 − AUGUST 2006
500
450
400
350
300
250
200
150
100
50
0
0.0625 0.125
QUIESCENT CURRENT
vs CONVERSION RATE
0.25 0.5
1
2
Conversion Rate (samples/s)
Figure 8
4
8
8
7
6
5
4
3
2
1
0
3.0
SHUTDOWN QUIESCENT CURRENT
vs SUPPLY VOLTAGE
3.5 4.0 4.5 5.0 5.5
VS (V)
Figure 10
6.0
5
5 Page 
TMP401
www.ti.com
STATUS REGISTER
The TMP401 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.
The OPEN status is only detected when the ADC is
attempting to convert a remote temperature.
The RTHRM bit reads as ‘1’ if the remote temperature has
exceeded the remote THERM limit and remains greater
than the remote THERM limit less the value in the shared
hysteresis register; see Figure 17.
The LTHRM bit reads as ‘1’ if the local temperature has
exceeded the local THERM limit and remains greater than
the local THERM limit less the value in the shared
hysteresis register; see Figure 17.
The LHIGH and RHIGH bit values depend on the state of
the AL/TH bit in the Configuration Register. If the AL/TH bit
is ‘0’, the LHIGH bit reads as ‘1’ if the local high limit was
exceeded since the last clearing of the Status Register.
The RHIGH bit reads as ‘1’ if the remote high limit was
exceeded since the last clearing of the Status Register. If
the AL/TH bit is ‘1’, the remote high limit and the local high
limit are used to implement a THERM2 function. LHIGH
reads as ‘1’ if the local temperature has exceeded the local
high limit and remains greater than the local high limit less
the value in the Hysteresis Register.
SBOS371 − AUGUST 2006
The RHIGH bit reads as ‘1’ if the remote temperature has
exceeded the remote high limit and remains greater than
the remote high limit less the value in the Hysteresis
Register.
The LLOW and RLOW bits are not affected by the AL/TH
bit. The LLOW bit reads as ‘1’ if the local low limit was
exceeded since the last clearing of the Status Register.
The RLOW bit reads as ‘1’ if the remote low limit was
exceeded since the last clearing of the Status Register.
The values of the LLOW, RLOW, and OPEN (as well as
LHIGH and RHIGH when AL/TH is ‘0’) are latched and will
read as ‘1’ until the Status Register is read or a device reset
occurs. These bits are cleared by reading the Status
Register, provided that the condition causing the flag to be
set no longer exists. The values of BUSY, LTHRM, and
RTHRM (as well as LHIGH and RHIGH when AL/TH is ‘1’)
are not latched and are not cleared by reading the Status
Register. They always indicate the current state, and are
updated appropriately at the end of the corresponding
ADC conversion. Clearing the Status Register bits does
not clear the state of the ALERT pin; an SMBus alert
response address command must be used to clear the
ALERT pin.
The TMP401 NORs LHIGH, LLOW, RHIGH, RLOW, and
OPEN, so a status change for any of these flags from ‘0’
to ‘1’ automatically causes the ALERT pin to go low (only
applies when the ALERT/THERM2 pin is configured for
ALERT mode).
Table 4. Status Register Format
STATUS REGISTER (Read = 02h, Write = NA)
BIT #
D7
D6
D5
D4
D3
D2
D1
D0
BIT NAME
POR VALUE
BUSY
0(1)
LHIGH
0
LLOW
0
RHIGH
0
RLOW
0
OPEN
0
RTHRM
0
LTHRM
0
(1) The BUSY bit will change to ‘1’ almost immediately (<< 100µs) following power-up, as the TMP401 begins the first temperature conversion.
It will be high whenever the TMP401 is converting a temperature reading.
11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet TMP401.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| TMP400 | 1 C Remote and Local Temp Sensor with N-Factor and Series Resistance Correction |  Texas Instruments |
| TMP401 | TMP401 1 C Programmable Remote and Local Digital Out Temperature Sensor (Rev. B) | Texas Instruments |
| TMP401 | Digital Out TEMPERATURE SENSOR | Burr-Brown |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |