參數(shù)資料
型號： HCPL7840
元件分類： 運動控制電子
英文描述： Analog Isolation Amplifier
中文描述： 模擬隔離放大器
文件頁數(shù)： 6/12頁
文件大?。?/td> 217K
代理商： HCPL7840
1-253
Figure 1. Input Offset Voltage Test Circuit.
Figure 2. Input Offset Change vs.
Temperature.
Figure 3. Input Offset Change vs.
V
DD1
and V
DD2
.
V
O
V
DD
– SUPPLY VOLTAGE – V
0.2
0.1
4.6
0.3
4.8
5.0
5.2
T
A
= 25°C
-0.1
vs. V
DD1
(V
DD2
= 5 V)
4.4
5.6
5.4
vs. V
DD2
(V
DD1
= 5 V)
0
V
O
T
A
– TEMPERATURE – °C
0
-0.2
-0.6
-20
0.6
20
60
V
DD1
= 5 V
V
DD2
= 5 V
-0.8
0.2
0.4
-40
100
-0.4
0
40
80
Notes:
1. If V
IN-
is brought above V
DD1
- 2 V
with respect to GND1 an internal test
mode may be activated. This test
mode is not intended for customer
use.
2. Exact offset value is dependent on
layout of external bypass capacitors.
The offset value in the data sheet
corresponds to HP’s recommended
layout (see Figures 25 and 26).
3. Nonlinearity is defined as half of the
peak-to-peak output deviation from
the best-fit gain line, expressed as a
percentage of the full-scale differen-
tial output voltage.
4. Because of the switched capacitor
nature of the sigma-delta A/D
converter, time-averaged values are
shown.
5. CMRR
IN
is defined as the ratio of the
gain for differential inputs applied
between pins 2 and 3 to the gain for
common mode inputs applied to both
pins 2 and 3 with respect to pin 4.
6. When the differential input signal
exceeds approximately 320 mV, the
outputs will limit at the typical values
shown.
7. Short-circuit current is the amount of
output current generated when either
output is shorted to V
DD2
or ground.
HP does not recommend operation
under these conditions.
8. CMR (also known as IMR or Isolation
Mode Rejection) specifies the
minimum rate of rise of a common
mode noise signal applied across the
isolation boundary at which small
output perturbations begin to appear.
These output perturbations can occur
with both the rising and falling edges
of the common mode waveform and
may be of either polarity. A CMR
failure is defined as a perturbation
exceeding 200 mV at the output of
the recommended application circuit
(Figure 23). See applications section
for more information on CMR.
9. CMRR is defined as the ratio of
differential signal gain (signal applied
differentially between pins 2 and 3)
to the common mode gain (input pins
tied to pin 4 and the signal applied
between the input and the output of
the isolation amplifier) at 60 Hz,
expressed in dB.
10. Output noise comes from two primary
sources: chopper noise and sigma-
delta quantization noise. Chopper
noise results from chopper stabiliza-
tion of the output op-amps. It occurs
at a specific frequency (typically 500
kHz) and is not attenuated by the on-
chip output filter. The on-chip filter
does eliminate most, but not all, of
the sigma-delta quantization noise.
An external filter circuit may be
easily added to the external post-
amplifier to reduce the total RMS
output noise. See applications section
for more information.
11. Data sheet value is the amplitude of
the transient at the differential output
of the HCPL-7840 when a 1 V
P-P
,
1 MHz square wave with 100 ns rise
and fall times (measured at pins 1
and 8) is applied to both V
DD1
and
V
DD2
.
12. In accordance with UL1577, each
isolation amplifer is proof tested by
applying an insulation test voltage
≥
3000 V
RMS
for 1 second (leakage
current detection limit I
I-O
≤
5
μ
A).
13. Device considered a two terminal
device: Pins 1, 2, 3 and 4 connected
together; pins 5, 6, 7 and 8
connected together.
0.1 μF
V
DD2
V
OUT
8
7
6
1
3
HCPL-7840
5
2
4
0.1 μF
10 K
10 K
V
DD1
+15 V
0.1 μF
0.1 μF
-15 V
+
–
AD624CD
GAIN = 100
0.47
μF
0.47
μF
Figure 4. Output Voltages vs. Input
Voltage.
V
O
V
IN
– INPUT VOLTAGE – V
2.5
2.0
1.5
-0.4
4.0
-0.2
0
0.2
V
DD1
= 5 V
V
DD2
= 5 V
T
A
= 25°C
1.0
3.0
3.5
-0.6
0.6
0.4
POSITIVE
OUTPUT
NEGATIVE
OUTPUT
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HCPL-7840 功能描述:隔離放大器 4.5 - 5.5 SV 8 dB 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(fēng)格:SMD/SMT 封裝 / 箱體:SOP-8 封裝:Tube
HCPL-7840#060 功能描述:隔離放大器 4.5 - 5.5 SV 8 dB 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(fēng)格:SMD/SMT 封裝 / 箱體:SOP-8 封裝:Tube
HCPL-7840#300 功能描述:隔離放大器 4.5 - 5.5 SV 8 dB 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(fēng)格:SMD/SMT 封裝 / 箱體:SOP-8 封裝:Tube
HCPL-7840#360 功能描述:隔離放大器 4.5 - 5.5 SV 8 dB 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(fēng)格:SMD/SMT 封裝 / 箱體:SOP-8 封裝:Tube
HCPL-7840#500 功能描述:隔離放大器 4.5 - 5.5 SV 8 dB 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(fēng)格:SMD/SMT 封裝 / 箱體:SOP-8 封裝:Tube
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