- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄223667 > DRV401AIRGWRG4 (TEXAS INSTRUMENTS INC) SPECIALTY ANALOG CIRCUIT, PQCC20 PDF資料下載
參數(shù)資料
| 型號： | DRV401AIRGWRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQCC20 |
| 封裝： | 5 X 5 MM, GREEN, PLASTIC, QFN-20 |
| 文件頁數(shù)： | 10/36頁 |
| 文件大?。?/td> | 963K |
| 代理商： | DRV401AIRGWRG4 |
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頁當前第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頁第31頁第32頁第33頁第34頁第35頁第36頁
DRV401
SBVS070B JUNE 2006 REVISED MAY 2009
www.ti.com
18
The reference input (REFIN) is the reference node for the
exact output signal (VOUT). Connecting REFIN to the
reference output (REFOUT) results in a live zero reference
voltage of 2.5V. Using the same reference for REFIN and
the ADC avoids mismatch errors that exist between two
reference sources.
OVER-RANGE COMPARATOR
High peak current can overload the differential amplifier
connected to the shunt. The OVER-RANGE pin, an
open-drain output, indicates an over-voltage condition for
the differential amplifier by pulling low. The output of this
flag is suppressed for 3
s, preventing unwanted triggering
from transients and noise. This pin returns to high as soon
as the overload condition is removed (external pull-up
required to return the pin high).
This ERROR flag not only provides a warning about a
signal clipping condition, but is also a window comparator
output for actively shutting off circuits in the system. The
value of the shunt resistor defines the operating window for
the current. It sets the ratio between the nominal signal and
the trip level of the Over-Range flag. The trip current of this
window comparator is calculated using the following
example:
With a 5V supply, the output voltage swing is
approximately
±2.45V
(load
and
supply
voltage-dependent).
The gain of 4V/V allows an input swing of
±0.6125V.
Thus, the clipping current is IMAX = 0.6125V/RSHUNT.
See the differential amplifier curve of the Typical
Characteristics, Output Voltage vs Output Current.
The over-range condition is internally detected as soon as
the amplifier exceeds its linear operating range, not just a
set voltage level. Therefore, the error or the over-range
comparator level is reliably indicated in fault conditions
such as output shorts, low load or low supply conditions.
As soon as the output cannot drive the voltage higher, the
flag
is
activated.
This
configuration
is
a
safety
improvement over a voltage level comparator.
NOTE: The internal resistance of the compensation coil
may prevent high compensation current from flowing
because of ICOMP driver overload. Therefore, the
differential amplifier may not overload with this current.
However, a fast rate of change of the primary current would
be transmitted through transformer action and safely
trigger the overload flag.
VOLTAGE REFERENCE
The precision 2.5V reference circuit offers low drift
(typically 10ppm/K) and is used for internal biasing; it is
also connected to the REFOUT pin. The circuit is intended
as the reference point of the output signal to allow a bipolar
signal around it. This output is buffered for low impedance
and tolerates sink and source currents of
±5mA.
Capacitive loads can be directly connected, but generate
ringing on fast load transients. A small series resistor of a
few ohms improves the response, especially for a
capacitive load in the range of 1
F. Figure 6 shows the
transient load regulation with 1nF direct load.
The reference source is part of the integrated circuit and
referenced to GND2. Large current pulses driving the
compensation coil can generate a voltage drop in the GND
connection that would add on to the reference voltage.
Therefore, a low impedance GND layout is critical to
handle the currents and the high bandwidth of this IC.
2.5
s/div
10
mV
/d
iv
10k
1nF
±5V
+2.5V
REF
OUT
Test Circuit:
Figure 6. Pulse Response Test Circuit and Scope Shot of Reference
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS-11802D4-124 | DIGITAL TO SYNCHRO OR RESOLVER, CDIP28 |
| DS1667S-10 | SPECIALTY ANALOG CIRCUIT, PDSO20 |
| DS1832N | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP8 |
| DS2720CU/T&R | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| DS36F95J | EIA-485/EIA-422A Differential Bus Transceiver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DRV401AIRGWT | 功能描述:功率驅(qū)動器IC Sensor Sig Conditioning RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| DRV401AIRGWTG4 | 功能描述:功率驅(qū)動器IC Sensor Signal Conditioning RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| DRV401AMDWPREP | 功能描述:功率驅(qū)動器IC Enh Prod Sensor Sig Conditioning RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| DRV401-EP | 制造商:TI 制造商全稱:Texas Instruments 功能描述:SENSOR SIGNAL CONDITIONING IC FOR CLOSED-LOOP MAGNETIC CURRENT SENSOR |
| DRV401-EP_09 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:SENSOR SIGNAL CONDITIONING IC FOR SENSOR SIGNAL CONDITIONING IC FOR |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。