- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370452 > HCPL-7870 Isolated 15-bit A/D Converter(隔離15位A/D轉(zhuǎn)換器) PDF資料下載
參數(shù)資料
| 型號： | HCPL-7870 |
| 英文描述： | Isolated 15-bit A/D Converter(隔離15位A/D轉(zhuǎn)換器) |
| 中文描述： | 隔離15位A / D轉(zhuǎn)換器（隔離15位的A / D轉(zhuǎn)換器） |
| 文件頁數(shù)： | 2/30頁 |
| 文件大?。?/td> | 344K |
| 代理商： | HCPL-7870 |
第1頁當(dāng)前第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
2
Digital Current Sensing
Circuit
As shown in Figure 1, using the
Isolated 2-chip A/D converter to
sense current can be as simple as
connecting a current-sensing
resistor, or shunt, to the input
and reading output data through
the 3-wire serial output interface.
By choosing the appropriate
shunt resistance, any range of
current can be monitored, from
less than 1 A to more than 100 A.
Even better performance can be
achieved by fully utilizing the
more advanced features of the
Isolated A/D converter, such as
the pre-trigger circuit which can
reduce conversion time to less
Figure 1: Typical Application Circuit.
Product Overview
Description
The HCPL-7860/HCPL-786J
Isolated Modulator and the
HCPL-x870 Digital Interface IC
together form an isolated
programmable two-chip analog-
to-digital converter. The isolated
modulator allows direct
measurement of motor phase
currents in power inverters while
the digital interface IC can be
programmed to optimize the
conversion speed and resolution
trade-off.
In operation, the HCPL-7860/
HCPL-786J Isolated Modulator
(optocoupler with 3750 V
RMS
dielectric withstand voltage
rating) converts a low-bandwidth
analog input into a high-speed
one-bit data stream by means of a
sigma-delta (
∑
) oversampling
modulator. This modulation
provides for high noise margins
and excellent immunity against
isolation-mode transients. The
modulator data and on-chip
sampling clock are encoded and
transmitted across the isolation
boundary where they are
recovered and decoded into
separate high-speed clock and
data channels.
The Digital Interface IC converts
the single-bit data stream from
the Isolated Modulator into
fifteen-bit output words and
provides a serial output interface
that is compatible with SPI
,
QSPI
, and Microwire
proto-
cols, allowing direct connection
to a microcontroller. The Digital
Interface IC is available in two
package styles: the HCPL-7870 is
in a 16-pin DIP package and the
HCPL-0870 is in a 300-mil wide
SO-16 surface-mount package.
Features of the Digital Interface
IC include five different conver-
sion modes, three different pre-
trigger modes, offset calibration,
fast over-range detection, and
adjustable threshold detection.
Programmable features are con-
figured via the Serial Configura-
tion port. A second multiplexed
input is available to allow
measurements with a second
than 1
μ
s, the fast over-range
detector for quickly detecting
short circuits, different conversion
modes giving various resolution/
speed trade-offs, offset calibra-
tion mode to eliminate initial
offset from measurements, and
an adjustable threshold detector
for detecting non-short circuit
overload conditions.
R
SHUNT
INPUT
CURRENT
V
DD1
V
IN+
V
IN-
ISOLATED
+ 5 V
GND1
V
DD2
MCLK
MDAT
GND2
C1
0.1 μF
+
CDAT
SCLK
CCLK
V
DD
CHAN
CLAT
MCLK1
SDAT
MDAT1
CS
MCLK2
THR1
MDAT2
OVR1
GND
RESET
NON-ISOLATED
+ 5 V
C3
10 μF
+
HCPL-7860/
HCPL-786J
3-WIRE
SERIAL
INTERFACE
C2
0.1 μF
HCPL-x870
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HCPL-788J | Isolation Amplifier with Short Circuit and Overload Detection(具有短路和過載保護(hù)功能的隔離放大器) |
| 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) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HCPL-788J | 功能描述:隔離放大器 4.5 - 5.5 SV RoHS:否 制造商:Texas Instruments 輸入補(bǔ)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(fēng)格:SMD/SMT 封裝 / 箱體:SOP-8 封裝:Tube |
| 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(bǔ)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(fēng)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(bǔ)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(fēng)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(bǔ)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(fēng)格:SMD/SMT 封裝 / 箱體:SOP-8 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。