Isolation Amplifier
Technical Data
HCPL-7840
Features
• 15 kV/
µ
s Common-Mode
Rejection at V
CM
= 1000 V
• Compact, Auto-Insertable
Standard 8-pin DIP Package
• 0.00025 V/V/
°
C Gain Drift vs.
Temperature
• 0.3 mV Input Offset Voltage
• 100 kHz Bandwidth
• 0.004% Nonlinearity
• Worldwide Safety Approval:
UL 1577 (3750 Vrms/1 min.)
and CSA, IEC/EN/DIN EN
60747-5-2 (Option #060
only)
• Advanced Sigma-Delta (Σ−
∆
)
A/D Converter Technology
• Fully Differential Circuit
Topology
• 0.8
µ
m CMOS IC Technology
Description
The HCPL-7840 isolation amplifier
family was designed for current
sensing in electronic motor drives.
In a typical implementation, motor
currents flow through an external
resistor and the resulting analog
voltage drop is sensed by the
HCPL-7840. A differential output
voltage is created on the other
side of the HCPL-7840 optical
isolation barrier. This differential
output voltage is proportional to
the motor current and can be con-
verted to a single-ended signal by
using an op-amp as shown in the
recommended application circuit.
Since common-mode voltage
swings of several hundred volts in
tens of nanoseconds are common
in modern switching inverter
motor drives, the HCPL-7840
was designed to ignore very high
common-mode transient slew
rates (of at least 10 kV/µs).
The high CMR capability of the
HCPL-7840 isolation amplifier
provides the precision and
stability needed to accurately
monitor motor current in high
noise motor control environ-
ments, providing for smoother
control (less “torque ripple”) in
various types of motor control
applications.
Functional Diagram
I
DD1
V
DD1
V
IN+
V
IN–
GND1
1
2
3
4
+
–
+
–
I
DD2
8
7
V
DD2
V
OUT+
V
OUT–
GND2
6
5
SHIELD
Applications
• Motor Phase and Rail
Current Sensing
• Inverter Current Sensing
• Switched Mode Power
Supply Signal Isolation
• General Purpose Current
Sensing and Monitoring
• General Purpose Analog
Signal Isolation
The product can also be used for
general analog signal isolation
applications requiring high
accuracy, stability, and linearity
under similarly severe noise con-
ditions. For general applications,
we recommend the HCPL-7840
(gain tolerance of
±
5%). The
HCPL-7840 utilizes sigma delta
(
∑
-
∆
) analog-to-digital converter
technology, chopper stabilized
amplifiers, and a fully differential
circuit topology fabricated using
CAUTION: It is advised that normal static precautions be taken in handling and assembly of this component to
prevent damage and/or degradation which may be induced by ESD.
2
Agilent’s 0.8
µm
CMOS IC
process. Together, these features
deliver unequaled isolation-mode
noise rejection, as well as excellent
offset and gain accuracy and
stability over time and
temperature. This performance
is delivered in a compact, auto-
insertable, industry standard 8-pin
DIP package that meets worldwide
regulatory safety standards. (A
gull-wing surface mount option
#300 is also available).
Ordering Information
Specify Part Number followed by Option Number (if desired).
HCPL-7840 =
±
5% Gain Tol.; Mean Gain = 8.00
Option: #YYYY
No Option = Standard DIP package, 50 per tube
060 =IEC/EN/DIN EN 60747-5-2 Option
300 =Surface Mount Option
500 =Tape/Reel Packaging Option, 1k min. per reel
XXXE = Lead Free Option
Remarks: The notation “#” is used for existing products, while (new) products launched since 15th July
2001 and lead free option will use “-”
Package Outline Drawings
Standard DIP Package
9.80 ± 0.25
(0.386 ± 0.010)
8
7
6
5
DATE CODE
A 7840
YYWW
1
1.19 (0.047) MAX.
2
3
4
7.62 ± 0.25
(0.300 ± 0.010)
6.35 ± 0.25
(0.250 ± 0.010)
1.78 (0.070) MAX.
3.56 ± 0.13
(0.140 ± 0.005)
4.70 (0.185) MAX.
0.51 (0.020) MIN.
2.92 (0.115) MIN.
0.20 (0.008)
0.33 (0.013)
1.080 ± 0.320
(0.043 ± 0.013)
0.65 (0.025) MAX.
2.54 ± 0.25
(0.100 ± 0.010)
5° TYP.
DIMENSIONS IN MILLIMETERS AND (INCHES).
NOTE: FLOATING LEAD PROTRUSION IS 0.5 mm (20 mils) MAX.
Note:
Initial or continued variation in the color of the HCPL-7840’s white mold compound is normal and does not affect device
performance or reliability.
3
Gull Wing Surface Mount Option 300
LAND PATTERN RECOMMENDATION
9.80 ± 0.25
(0.386 ± 0.010)
8
7
6
5
1.016 (0.040)
A 7840
YYWW
6.350 ± 0.25
(0.250 ± 0.010)
10.9 (0.430)
1
2
3
4
1.27 (0.050)
2.0 (0.080)
1.19
(0.047)
MAX.
1.780
(0.070)
MAX.
9.65 ± 0.25
(0.380 ± 0.010)
7.62 ± 0.25
(0.300 ± 0.010)
0.20 (0.008)
0.33 (0.013)
3.56 ± 0.13
(0.140 ± 0.005)
1.080 ± 0.320
(0.043 ± 0.013)
2.54
(0.100)
BSC
0.635 ± 0.130
(0.025 ± 0.005)
0.635 ± 0.25
(0.025 ± 0.010)
12° NOM.
DIMENSIONS IN MILLIMETERS (INCHES).
TOLERANCES (UNLESS OTHERWISE SPECIFIED): xx.xx = 0.01
xx.xxx = 0.005
NOTE: FLOATING LEAD PROTRUSION IS 0.5 mm (20 mils) MAX.
LEAD COPLANARITY
MAXIMUM: 0.102 (0.004)
4
Solder Reflow Temperature Profile
300
PREHEATING RATE 3°C + 1°C/–0.5°C/SEC.
REFLOW HEATING RATE 2.5°C ± 0.5°C/SEC.
PEAK
TEMP.
245°C
PEAK
TEMP.
240°C
PEAK
TEMP.
230°C
2.5°C ± 0.5°C/SEC.
160°C
150°C
140°C
3°C + 1°C/–0.5°C
30
SEC.
30
SEC.
SOLDERING
TIME
200°C
TEMPERATURE (°C)
200
100
PREHEATING TIME
150°C, 90 + 30 SEC.
50 SEC.
TIGHT
TYPICAL
LOOSE
ROOM
TEMPERATURE
0
0
50
100
150
200
250
TIME (SECONDS)
Recommended Pb-Free IR Profile
TIME WITHIN 5 °C of ACTUAL
PEAK TEMPERATURE
20-40 SEC.
t
p
T
p
T
L
TEMPERATURE
260 +0/-5 °C
217 °C
RAMP-UP
3 °C/SEC. MAX.
150 - 200 °C
RAMP-DOWN
6 °C/SEC. MAX.
T
smax
T
smin
t
s
PREHEAT
60 to 180 SEC.
25
t 25 °C to PEAK
t
L
60 to 150 SEC.
TIME
NOTES:
THE TIME FROM 25 °C to PEAK TEMPERATURE = 8 MINUTES MAX.
T
smax
= 200 °C, T
smin
= 150 °C
5
Regulatory Information
The HCPL-7840 has been approved by the following organizations:
IEC/EN/DIN EN 60747-5-2
Approved under:
IEC 60747-5-2:1997 + A1:2002
EN 60747-5-2:2001 + A1:2002
DIN EN 60747-5-2 (VDE 0884
Teil 2):2003-01.
UL
Approval under UL 1577, com-
ponent recognition program up
to V
ISO
= 3750 Vrms.
CSA
Approved under CSA Component
Acceptance Notice #5, File CA
88324.
IEC/EN/DIN EN 60747-5-2 Insulation Characteristics*
Description
Installation classification per DIN VDE 0110/1.89, Table 1
for rated mains voltage
≤
300 Vrms
for rated mains voltage
≤
450 Vrms
for rated mains voltage
≤
600 Vrms
Climatic Classification
Pollution Degree (DIN VDE 0110/1.89)
Maximum Working Insulation Voltage
Input to Output Test Voltage, Method b**
V
IORM
x 1.875 = V
PR,
100% Production Test with
t
m
= 1 sec, Partial discharge < 5 pC
Input to Output Test Voltage, Method a**
V
IORM
x 1.5 = V
PR,
Type and Sample Test,
t
m
= 60 sec, Partial discharge < 5 pC
Highest Allowable Overvoltage
(Transient Overvoltage t
ini
= 10 sec)
Safety-limiting values—maximum values
allowed in the event of a failure.
Case Temperature
Input Current***
Output Power***
Insulation Resistance at T
S
, V
IO
= 500 V
Symbol
Characteristic
I-IV
I-III
I-II
55/100/21
2
891
1670
Unit
V
IORM
V
PR
V
PEAK
V
PEAK
V
PR
V
IOTM
1336
6000
V
PEAK
V
PEAK
T
S
I
S,INPUT
P
S,OUTPUT
R
S
175
400
600
>10
9
°C
mA
mW
Ω
*Insulation characteristics are guaranteed only within the safety maximum ratings which must be ensured by protective circuits within
the application. Surface Mount Classification is Class A in accordance with CECC00802.
**Refer to the optocoupler section of the Isolation and Control Components Designer’s Catalog, under Product Safety Regulations
section, IEC/EN/DIN EN 60747-5-2, for a detailed description of Method a and Method b partial discharge test profiles.
***Refer to the following figure for dependence of P
S
and I
S
on ambient temperature.
OUTPUT POWER – P
S
, INPUT CURRENT – I
S
800
700
600
500
400
300
200
100
0
0
25
50
75 100 125 150 175 200
P
S
(mW)
I
S
(mA)
T
A
– CASE TEMPERATURE – °C
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