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參數(shù)資料
| 型號： | TMP512AIRSAT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQCC16 |
| 封裝： | GREEN, PLASTIC, QFN-16 |
| 文件頁數(shù)： | 16/61頁 |
| 文件大?。?/td> | 1758K |
| 代理商： | TMP512AIRSAT |
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Power Register
Current Register
Two-Wire
Interface
Voltage Register
ADC
GND
GPIO
DXP1
DXN1
DXP2
DXN2
ADC
Low-Pass Filter
MUX
DXP3
DXN3
V
IN+
V
IN-
Current
Shunt
Load
Filter C
V+
Subregulator
3.3V
Internal
Diode
Temperature
Sensor
A0
ALERT
SDA
SCL
SMBus
Controller
3.3V Supply
TMP512
TMP513
0.1 F to 1 F
Ceramic Capacitor
m
10W
SBOS491A
– JUNE 2010 – REVISED MAY 2011
COMPATIBILITY WITH TI HOT-SWAP
This architecture has good inherent noise rejection;
CONTROLLERS
however, transients that occur at or very close to the
sampling
rate
harmonics
can
cause
problems.
The TMP512/13 are designed for compatibility with
Because these signals are at 1MHz and higher, they
hot-swap controllers such the TI TPS2490. The
can be dealt with by incorporating filtering at the input
TPS2490 uses a high-side shunt with a limit at 50mV;
of the TMP512/13. The high frequency enables the
the TMP512/13 full-scale range of 40mV enables the
use of low-value series resistors on the filter for
use of the same shunt for current sensing below this
negligible
effects
on
measurement
accuracy.
limit. When sensing is required at (or through) the
Figure 30 shows the TMP512/13 with an additional
50mV sense point of the TPS2490, the PGA of the
filter added at the input.
TMP512/13 can be set to
÷2 to provide an 80mV
full-scale range.
Overload conditions are another consideration for the
TMP512/13
inputs.
The
TMP512/13
inputs
are
specified to tolerate 26V across the inputs. A large
FILTERING AND INPUT CONSIDERATIONS
differential scenario might be a short to ground on the
Measuring current is often noisy, and such noise can
load side of the shunt. This type of event can result in
be difficult to define. The TMP512/13 offer several
full power-supply voltage across the shunt (as long
options for filtering by choosing resolution and
the power supply or energy storage capacitors
averaging in Configuration Register 1. These filtering
support it). It must be remembered that removing a
options can be set independently for either voltage or
short to ground can result in inductive kickbacks that
current measurement.
could exceed the 26V differential and common-mode
rating of the TMP512/13. Inductive kickback voltages
The internal ADC is based on a delta-sigma (
ΔΣ)
are best dealt with by zener-type transient-absorbing
front-end with a 500kHz (
±10%) typical sampling rate.
devices (commonly called transzorbs) combined with
sufficient energy storage capacitance.
Figure 30. TMP512/13 with Input Filtering
Copyright
2010–2011, Texas Instruments Incorporated
23
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TMP513 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Temperature and Power Supply System Monitors |
| TMP513AID | 功能描述:板上安裝溫度傳感器 All-In-One Thermal & Pwr Monitoring Sol 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(shù)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(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| TMP513AIDR | 功能描述:板上安裝溫度傳感器 All-In-One Thermal & Pwr Monitoring Sol 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(shù)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(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| TMP513AIRSAR | 功能描述:板上安裝溫度傳感器 All-In-One Thermal & Pwr Monitor Sol 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(shù)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(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| TMP513AIRSAT | 功能描述:板上安裝溫度傳感器 All-In-One Thermal & Pwr Monitor Sol 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(shù)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(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
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