Isolation Amplifier
Technical Data
HCPL-7800A
HCPL-7800
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 V
rms
/1 min.)
and CSA, VDE 0884 (pending)
• Advanced Sigma-Delta (Σ−
∆
)
A/D Converter Technology
• Fully Differential Circuit
Topology
Description
The HCPL-7800(A) 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-7800(A). A differential
output voltage is created on the
other side of the HCPL-7800(A)
optical isolation barrier. This
differential output voltage is
proportional to the motor current
and can be converted 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-7800(A)
was designed to ignore very high
common-mode transient slew
rates (of at least 10 kV/µs).
The high CMR capability of the
HCPL-7800(A) isolation amplifier
provides the precision and
stability needed to accurately
monitor motor current in high
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
noise motor control environ-
ments, providing for smoother
control (less “torque ripple”) in
various types of motor control
applications.
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-7800
(gain tolerance of
±
3%). For
precision applications Agilent
offers the HCPL-7800A with part-
to-part gain tolerance of
±
1%.
The HCPL-7800(A) utilizes sigma
delta (
∑
-
∆
) analog-to-digital
converter technology, chopper
stabilized amplifiers, and a fully
differential circuit topology.
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
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
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-7800A =
±
1% Gain Tol.; Mean Gain = 8.00
HCPL-7800 =
±
3% Gain Tol.; Mean Gain = 8.00
Option: #YYY
No Option = Standard DIP package, 50 per tube
300 = Surface Mount Option
500 = Tape/Reel Packaging Option, 1k min. per reel
Package Outline Drawings
Standard DIP Package
9.65 ± 0.25
(0.380 ± 0.010)
8
7
6
5
DATE CODE
A 7800
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.
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:
Initial or continued variation in the color of the HCPL-7800(A)’s white mold compound is normal and does not affect device
performance or reliability.
3
Gull Wing Surface Mount Option 300
PAD LOCATION (FOR REFERENCE ONLY)
9.65 ± 0.25
(0.380 ± 0.010)
8
7
6
5
1.016 (0.040)
1.194 (0.047)
4.826 TYP.
(0.190)
A 7800
YYWW
6.350 ± 0.25
(0.250 ± 0.010)
9.398 (0.370)
9.960 (0.390)
1
2
3
4
1.194 (0.047)
1.778 (0.070)
1.780
(0.070)
MAX.
9.65 ± 0.25
(0.380 ± 0.010)
7.62 ± 0.25
(0.300 ± 0.010)
0.381 (0.015)
0.635 (0.025)
1.19
(0.047)
MAX.
4.19 MAX.
(0.165)
0.20 (0.008)
0.33 (0.013)
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
LEAD COPLANARITY
MAXIMUM: 0.102 (0.004)
Maximum Solder Reflow Thermal Profile
260
240
220
200
180
160
140
120
100
80
60
40
20
0
0
1
∆T
= 145°C, 1°C/SEC
∆T
= 115°C, 0.3°C/SEC
TEMPERATURE – °C
∆T
= 100°C, 1.5°C/SEC
2
3
4
5
6
7
8
9
10
11
12
TIME – MINUTES
(NOTE: USE OF NON-CHLORINE ACTIVATED FLUXES IS RECOMMENDED.)
4
Regulatory Information
The HCPL-7800(A) are pending approval by the following organizations:
VDE
Approval under VDE 0884/06.92
with V
IORM
= 891 V
PEAK
expected
prior to product release.
UL
Approval under UL 1577, com-
ponent recognition program up
to V
ISO
= 3750 V
rms
expected
prior to product release.
CSA
Approved under CSA Component
Acceptance Notice #5, File CA
88324 expected prior to product
release.
VDE 0884 Insulation Characteristics*
Description
Installation classification per DIN VDE 0110/1.89, Table 1
for rated mains voltage
≤
300 V
rms
for rated mains voltage
≤
450 V
rms
for rated mains voltage
≤
600 V
rms
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, (VDE 0884) 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
5
Insulation and Safety Related Specifications
Parameter
Minimum External Air Gap
(Clearance)
Minimum External Tracking
(Creepage)
Minimum Internal Plastic Gap
(Internal Clearance)
Tracking Resistance
(Comparative Tracking Index)
Isolation Group
Symbol
L(101)
L(102)
Value
7.4
8.0
0.5
Unit
mm
mm
mm
Conditions
Measured from input terminals to output
terminals, shortest distance through air.
Measured from input terminals to output
terminals, shortest distance path along body.
Through insulation distance conductor to
conductor, usually the straight line distance
thickness between the emitter and detector.
DIN IEC 112/VDE 0303 Part 1
Material Group (DIN VDE 0110, 1/89,
Table 1)
CTI
>175
III a
Volts
Absolute Maximum Ratings
Parameter
Storage Temperature
Operating Temperature
Supply Voltage
Steady-State Input Voltage
2 Second Transient Input Voltage
Output Voltage
Solder Reflow Temperature Profile
Symbol
T
S
T
A
V
DD1
, V
DD2
V
IN+
, V
IN-
V
OUT
Min.
Max.
Unit
Note
-55
125
°C
- 40
100
0
5.5
V
-2.0
V
DD1
+0.5
-6.0
-0.5
V
DD2
+0.5
See
Package Outline Drawings
Section
Recommended Operating Conditions
Parameter
Ambient Operating Temperature
Supply Voltage
Input Voltage (accurate and linear)
Input Voltage (functional)
Symbol
T
A
V
DD1
, V
DD2
V
IN+
, V
IN-
V
IN+
, V
IN-
Min.
-40
4.5
-200
-2
Max.
85
5.5
200
2
Unit
°C
V
mV
V
Note
1
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