- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370452 > HCPL-788J Isolation Amplifier with Short Circuit and Overload Detection(具有短路和過載保護功能的隔離放大器) PDF資料下載
參數(shù)資料
| 型號： | HCPL-788J |
| 元件分類： | 運動控制電子 |
| 英文描述： | Isolation Amplifier with Short Circuit and Overload Detection(具有短路和過載保護功能的隔離放大器) |
| 中文描述： | 隔離放大器短路和過載檢測（具有短路和過載保護功能的隔離放大器） |
| 文件頁數(shù)： | 20/20頁 |
| 文件大小： | 277K |
| 代理商： | HCPL-788J |
5. Power Supplies and Start-Up
V
OUT
(pin 12) is close to zero volts, ABSVAL (pin 13)
is close to V
REF
and FAULT (pin 14) is in the high
(inactive) state when power to the input side is off.
In fact, a self test can be performed using this infor-
mation. In a motor drive, it is possible to turn off
all the power transistors and thus cause all the sense
resistor voltages to be zero. In this case, finding
V
OUT
less than
1
/
4
of V
REF
, ABSVAL more than
3
/
4
of
V
REF
and FAULT in the high state indicates that
power to the input side is not on.
About 50
μ
s after a V
DD2
power-up and 100
μ
s after
a V
DD1
power-up.
5.1
: What are the output voltages before the
input side power supply is turned on
5.2:
How long does the HCPL-788J take to
begin working properly after power-up
6. Miscellaneous
The inputs have a series resistor for protection
against large negative inputs. Normal signals are
no more than 200 mV in amplitude. Such signals
do not forward bias any junctions sufficiently to
interfere with accurate operation of the switched
capacitor input circuit.
Typically, noticeable ringing and overshoot begins
for C
LOAD
above 0.02
μ
F. HP recommends keeping
the load capacitance under 5000 pF (at pin 12).
ABSVAL (pin 13) typically exhibits no instability
at any load capacitance, but speed of response
gradually slows above 470 pF load.
Yes, with a compromise on offset accuracy. One way
to do this is by connecting +2.5 V to pins 10, 11, and
15 and connecting -2.5 V to pins 9 and 16 with
0.1
μ
F bypass capacitors from +2.5 V to -2.5 V and
from -2.5 V to ground. Note that FAULT cannot
swing above 2.5 V in this case, so a level shifter may
be needed. Alternately, a single 5 V supply could be
power the HCPL-788J which could drive an op amp
configured to subtract
1
/
2
of V
REF
from V
OUT
.
6.1:
How does the HCPL-788J measure
negative signals with only a +5 V supply
6.2:
What load capacitance can the
HCPL-788J drive
6.3:
Can I use the HCPL-788J with a bipolar
input A/D converter
www.semiconductor.agilent.com
Data subject to change.
Copyright 1999 Agilent Technologies
5966-0001E (11/99)
相關PDF資料 |
PDF描述 |
|---|---|
| HCPL-810J | PLC Powerline DAA IC |
| HCPL-J314 | 0.4 Amp Output Current IGBT Gate Drive Optocoupler(0.4 放大輸出電流 IGBT門驅(qū)動光耦合器) |
| HCPL-J454 | High CMR, High Speed Optocouplers(高CMR，高速光耦合器) |
| HCPL-0454 | High CMR, High Speed Optocouplers(高CMR，高速光耦合器) |
| HCPL-J456 | Intelligent Power Module and Gate Drive Interface Optocouplers(智能功率模塊和門驅(qū)動接口光耦合器) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| HCPL-788J#500 | 功能描述:隔離放大器 4.5 - 5.5 SV RoHS:否 制造商:Texas Instruments 輸入補償電壓:1.5 mV 共模抑制比（最小值）:95 dB 帶寬:60 KHz 工作電源電壓:3.3 V 電源電流:8 mA 工作溫度范圍:- 40 C to + 105 C 安裝風格:SMD/SMT 封裝 / 箱體:SOP-8 封裝:Tube |
| HCPL-788J/EVAL | 制造商:Avago Technologies 功能描述: |
| HCPL-788J-000E | 功能描述:隔離放大器 4.5 - 5.5 SV RoHS:否 制造商:Texas Instruments 輸入補償電壓:1.5 mV 共模抑制比（最小值）:95 dB 帶寬:60 KHz 工作電源電壓:3.3 V 電源電流:8 mA 工作溫度范圍:- 40 C to + 105 C 安裝風格:SMD/SMT 封裝 / 箱體:SOP-8 封裝:Tube |
| HCPL-788J-500E | 功能描述:隔離放大器 4.5 - 5.5 SV RoHS:否 制造商:Texas Instruments 輸入補償電壓:1.5 mV 共模抑制比（最小值）:95 dB 帶寬:60 KHz 工作電源電壓:3.3 V 電源電流:8 mA 工作溫度范圍:- 40 C to + 105 C 安裝風格:SMD/SMT 封裝 / 箱體:SOP-8 封裝:Tube |
| HCPL-800J | 功能描述:緩沖器和線路驅(qū)動器 PLC Powerline DAA IC RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復。