- 您現在的位置：買賣IC網 > PDF目錄98266 > TMP435ADGST (TEXAS INSTRUMENTS INC) SPECIALTY ANALOG CIRCUIT, PDSO10 PDF資料下載
參數資料
| 型號： | TMP435ADGST |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 模擬信號調理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO10 |
| 封裝： | GREEN, PLASTIC, MSOP-10 |
| 文件頁數： | 31/31頁 |
| 文件大小： | 477K |
| 代理商： | TMP435ADGST |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁當前第31頁
www.ti.com
SBOS495A – MARCH 2010 – REVISED APRIL 2010
APPLICATION INFORMATION
correct for any changes in the beta factor as a result
The TMP435 (two-channel) is a digital temperature
of temperature variation. The device can operate a
sensor
that
combines
a
local
die
temperature
PNP transistor with a beta factor as low as 0.1. See
measurement
channel
and
a
remote
junction
the
temperature
measurement
channel
in
a
single
section for further information.
package. This device is two-wire- and SMBus
interface-compatible,
and
is
specified
over
a
Series Resistance Cancellation
temperature range of –40°C to +125°C. The TMP435
contains multiple registers for holding configuration
Series resistance in an application circuit that typically
information,
temperature
measurement
results,
results
from
printed
circuit
board
(PCB)
trace
temperature comparator maximum/minimum limits,
resistance and remote line length is automatically
and status information. User-programmed high and
cancelled by the TMP435, preventing what would
low temperature limits stored in the TMP435 can be
otherwise result in a temperature offset. A total of up
used to trigger an over/under temperature alarm
to 1k
of series line resistance is cancelled by the
(ALERT)
on
local
and
remote
temperatures.
TMP435 if beta correction is disabled and up to 300
Additional thermal limits can be programmed into the
of series line resistance is canceled if beta correction
TMP435 and used to trigger another flag (THERM)
is
enabled,
eliminating
the
need
for
additional
that can be used to initiate a system response to
characterization and temperature offset correction.
rising temperatures.
See the two Remote Temperature Error vs Series
Resistance typical characteristic curves (Figure 7 and
For proper remote temperature sensing operation, the
Figure 8) for details on the effect of series resistance
TMP435
requires
only
a
transistor
connected
on sensed remote temperature error.
between DXP and DXN.
The SCL and SDA interface pins require pull-up
Differential Input Capacitance
resistors as part of the communication bus, while
The
TMP435
can
tolerate
differential
input
ALERT and THERM are open-drain outputs that also
capacitance of up to 2200pF with minimal change in
need pull-up resistors. ALERT and THERM may be
temperature error. The effect of capacitance on
shared with other devices if desired for a wired-OR
sensed remote temperature error is illustrated in
implementation.
A
0.1mF
power-supply
bypass
Figure 9 and Figure 10, Remote Temperature Error
capacitor is recommended for good local bypassing.
vs Differential Capacitance. See the Filtering section
See Figure 13 for a typical configuration.
for suggested component values where filtering
unwanted coupled signals is needed.
Beta Compensation
Previous generations of remote junction temperature
Temperature Measurement Data
sensors were operated by controlling the emitter
Temperature measurement data are taken over a
current
of
the
sensing
transistor.
However,
default range of 0°C to +127°C for both local and
examination of the physics of a transistor shows that
remote
locations.
However,
measurements
from
VBE is actually a function of the collector current. If
–55°C to +150°C can be made both locally and
beta is independent of the collector current, then VBE
remotely
by
reconfiguring
the
TMP435
for
the
may be calculated from the emitter current. In earlier
extended temperature range, as described in this
generations
of
processors
that
contained
PNP
section. Temperature data resulting from conversions
transistors connected to these temperature sensors,
within
the
default
measurement
range
are
controlling the emitter current provided acceptable
represented in binary form, as shown in Table 1,
temperature measurement results. At 90nm process
Standard Binary column. Note that any temperature
geometry and below, the beta factor continues to
below 0°C results in a data value of zero (00h).
decrease and the premise that it is independent of
Likewise, temperatures above +127°C result in a
collector current becomes less certain.
value of 127 (7Fh). The device can be set to measure
To manage this increasing temperature measurement
over an extended temperature range by changing bit
error, the TMP435 controls the collector current
2 (RANGE) of Configuration Register 1 from low to
instead
of
the
emitter
current.
The
TMP435
high. The change in measurement range and data
automatically detects and chooses the correct range
format from standard binary to extended binary
depending
on
the
beta
factor
of
the
external
occurs at the next temperature conversion.
transistor. This auto-ranging is performed at the
beginning of each temperature conversion in order to
Copyright 2010, Texas Instruments Incorporated
9
Product Folder Link(s): TMP435
相關PDF資料 |
PDF描述 |
|---|---|
| TMS320AV100PBM | SPECIALTY CONSUMER CIRCUIT, PQFP120 |
| TMS320AV120FN | SPECIALTY CONSUMER CIRCUIT, PQCC44 |
| TMS320AV220PCM | SPECIALTY CONSUMER CIRCUIT, PQFP144 |
| TMS320AV410PJM | COLOR SIGNAL ENCODER, PQFP100 |
| TMS320AV411PJM | COLOR SIGNAL ENCODER, PQFP100 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TMP441 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:?±1?°C TEMPERATURE SENSOR with Automatic Beta Compensation, Series-R, and h-Factor in a SOT23-8 |
| TMP441AIDCNR | 功能描述:板上安裝溫度傳感器 Temp Sensor with Auto Beta Comp RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| TMP441AIDCNT | 功能描述:板上安裝溫度傳感器 Temp Sensor with Auto Beta Comp RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| TMP441AIDCNT | 制造商:Texas Instruments 功能描述:Temperature Sensor IC 制造商:Texas Instruments 功能描述:IC, TEMP SENSOR, 12BIT, 0.25C SOT23-8 |
| TMP442ADCNR | 功能描述:板上安裝溫度傳感器 Temp Sensor with Auto Beta Comp RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
發布緊急采購，3分鐘左右您將得到回復。