ACPL-C79B, ACPL-C79A, ACPL-C790
Precision Miniature Isolation Amplifiers
Data Sheet
Description
The ACPL-C79B/C79A/C790 isolation amplifiers are
designed for current and voltage sensing in electronic
power converters in applications including motor drives
and renewable energy systems. In a typical motor drive
implementation, current flows through an external
resistor and the resulting analog voltage drop is sensed by
the isolation amplifier. A differential output voltage that is
proportional to the current is created on the other side of
the optical isolation barrier.
For general applications, the ACPL-C79A (±1% gain
tolerance) and the ACPL-C790 (±3% gain tolerance)
are recommended. For high precision applications, the
ACPL-C79B (±0.5% gain tolerance) can be used. The
product operates from a single 5 V supply and provides
excellent linearity and dynamic performance of 62 dB SNR.
With 200 kHz bandwidth, 1.6
µs
fast response time, the
product captures transients in short circuit and overload
conditions. The high common-mode transient immunity
(15 kV/µs) of the ACPL-C79B/C79A/C790 provides the
precision and stability needed to accurately monitor
motor current in high noise motor control environments,
providing for smoother control (less “torque ripple”) in
various types of motor control applications.
Combined with superior optical coupling technology, the
ACPL-C79B/C79A/C790 implements sigma-delta (∑-∆)
analog-to-digital converter, chopper stabilized ampli-
fiers, and a fully differential circuit topology to provide
unequaled isolation-mode noise rejection, low offset,
high gain accuracy and stability. This performance is
delivered in a compact, auto-insertable Stretched SO-8
(SSO-8) package that meets worldwide regulatory safety
standards.
Features
•
±0.5% High Gain Accuracy (ACPL-C79B)
•
–50 ppm/°C Low Gain Drift
•
0.4 mV Input Offset Voltage
•
0.05% Excellent Linearity
•
62 dB SNR
•
200 kHz Wide Bandwidth
•
3 V to 5.5 V Wide Supply Range for Output Side
•
–40°C to +105°C Operating Temperature Range
•
Advanced Sigma-Delta (∑-∆) A/D Converter Technology
•
Fully Differential Isolation Amplifier
•
15 kV/µs Common-Mode Transient Immunity
•
Compact, Auto-Insertable Stretched SO-8 Package
•
Safety and Regulatory Approvals:
– IEC/EN/DIN EN 60747-5-5: 1414 Vpeak working
insulation voltage
– UL 1577: 5000 Vrms/1min double protection rating
– CSA: Component Acceptance Notice #5
Applications
•
Current/Voltage Sensing in AC and Servo Motor Drives
•
Solar Inverters, Wind Turbine Inverters
•
Industrial Process Control
•
Data acquisition systems
•
Switching Power Supply Signal Isolation
•
General Purpose Analog Signal Isolation
•
Traditional Current Transducer Replacements
Functional Diagram
V
DD1
1
V
IN+
2
V
IN-
3
GND1 4
Figure 1.
I
DD1
+
-
SHIELD
I
DD2
8 V
DD2
7 V
OUT+
6 V
OUT-
5 GND2
NOTE:
A 0.1
µF
bypass capacitor must be connected
between pins 1 and 4 and between pins 5 and 8.
+
-
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.
Table 1. Pin Description
Pin No.
1
2
3
4
5
6
7
8
Symbol
V
DD1
V
IN+
V
IN–
GND1
GND2
V
OUT–
V
OUT+
V
DD2
Description
Supply voltage for input side (4.5 V to 5.5 V), relative to GND1
Positive input (± 200 mV recommended)
Negative input (normally connected to GND1)
Input side ground
Output side ground
Negative output
Positive output
Supply voltage for output side (3 V to 5.5 V), relative to GND2
Table 2. Ordering Information
ACPL-C79B/C79A/C790 is UL recognized with 5000 Vrms/1 minute rating per UL 1577.
Part number
ACPL-C79B
ACPL-C79A
ACPL-C790
Option
(RoHS Compliant)
-000E
-500E
Package
Stretched
SO-8
Surface
Mount
X
X
Tape &
Reel
X
IEC/EN/DIN EN
60747-5-5
X
X
Quantity
80 per tube
1000 per reel
To order, choose a part number from the part number column and combine with the desired option from the option
column to form an order entry.
Example:
ACPL-C79B-500E to order product of Surface Mount package in Tape and Reel packaging with IEC/EN/DIN EN 60747-5-5
Safety Approval and RoHS compliance.
Option datasheets are available. Contact your Avago sales representative or authorized distributor for information.
2
Package Outline Drawings
Stretched SO-8 Package (SSO-8)
RECOMMENDED LAND PATTERN
5.850 ± 0.50
(0.230 ± 0.010)
PART NUMBER
8
7
6
5
DATE CODE
12.650 (0.5)
RoHS-COMPLIANCE
INDICATOR
C79B
YYWW
EEE
1
2
3
4
6.807 ± 0.127
(0.268 ± 0.005)
1.905 (0.1)
1.590 ± 0.127
(0.063 ± 0.005)
LOT ID
7°
3.180 ± 0.127
(0.125 ± 0.005)
0.450
(0.018)
45°
0.381 ± 0.130
(0.015 ± 0.005)
0.750 ± 0.250
(0.0295 ± 0.010)
1.270
(0.050) BSG
11.50 ± 0.250
(0.453 ± 0.010)
0.200 ± 0.100
(0.008 ± 0.004)
Dimensions in millimeters and (inches).
Lead coplanarity = 0.1 mm (0.004 inches).
Figure 2. SSO-8 package.
Recommended Pb-Free IR Profile
Recommended reflow condition as per JEDEC Standard, J-STD-020 (latest revision). Non-Halide Flux should be used.
Regulatory Information
The ACPL-C79B/C79A/C790 is approved by the following organizations:
IEC/EN/DIN EN 60747-5-5
Approved with
Maximum Working Insulation Voltage V
IORM
= 1414 Vpeak.
UL
Approval under UL 1577, component recognition program up to V
ISO
= 5000 Vrms/1min. File E55361.
CSA
Approval under CSA Component Acceptance Notice #5, File CA 88324.
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Table 3. Insulation and Safety Related Specifications
Parameter
Minimum External Air Gap
(External Clearance)
Minimum External Tracking
(External Creepage)
Minimum Internal Plastic Gap
(Internal Clearance)
Tracking Resistance
(Comparative Tracking Index)
Isolation Group
CTI
Symbol
L(101)
L(102)
Value
8.0
8.0
0.5
Units
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 direct distance between the photoemitter and
photodetector inside the optocoupler cavity
DIN IEC 112/VDE 0303 Part 1
Material Group (DIN VDE 0110, 1/89, Table 1)
>175
IIIa
V
Table 4. IEC/EN/DIN EN 60747-5-5 Insulation Characteristics
[1]
Description
Installation classification per DIN VDE 0110/1.89, Table 1
for rated mains voltage ≤ 150 Vrms
for rated mains voltage ≤ 300 Vrms
for rated mains voltage ≤ 450 V rms
for rated mains voltage ≤ 600 Vrms
for rated mains voltage ≤ 1000 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 1.6 = V
PR
, Type and Sample Test, t
m
= 10 sec,
Partial Discharge < 5 pC
Highest Allowable Overvoltage (Transient Overvoltage, t
ini
= 60 sec)
Safety-limiting values
(Maximum values allowed in the event of a failure)
Case Temperature
Input Current
[2]
Output Power
[2]
Insulation Resistance at T
S
, V
IO
= 500 V
V
IORM
V
PR
Symbol
Value
I-IV
I-IV
I-IV
I-IV
I-III
55/105/21
2
1414
2652
Units
Vpeak
Vpeak
V
PR
2262
Vpeak
V
IOTM
8000
Vpeak
T
S
I
S,INPUT
P
S,OUTPUT
R
S
175
230
600
≥ 10
9
°C
mA
mW
Ω
Notes:
1. Insulation characteristics are guaranteed only within the safety maximum ratings, which must be ensured by protective circuits within the
application.
2. Safety-limiting parameters are dependent on ambient temperature. The Input Current, I
S,INPUT
, derates linearly above 25°C free-air temperature at
a rate of 2.53 mA/°C; the Output Power, P
S,OUTPUT
, derates linearly above 25°C free-air temperature at a rate of 4 mW/°C.
4
Table 5. Absolute Maximum Ratings
Parameter
Storage Temperature
Ambient Operating Temperature
Supply Voltages
Steady-State Input Voltage
[1, 3]
Two-Second Transient Input Voltage
[2]
Output Voltages
Lead Solder Temperature
Symbol
T
S
T
A
V
DD1
, V
DD2
V
IN+
, V
IN–
V
IN+
, V
IN–
V
OUT+
, V
OUT–
Min.
–55
–40
–0.5
–2
–6
–0.5
Max.
+125
+105
6.0
V
DD1
+ 0.5
V
DD1
+ 0.5
V
DD2
+ 0.5
Units
°C
°C
V
V
V
V
260°C for 10 sec., 1.6 mm below seating plane
Notes:
1. DC voltage of up to –2 V on the inputs does not cause latch-up or damage to the device; tested at typical operating conditions.
2. Transient voltage of 2 seconds up to –6 V on the inputs does not cause latch-up or damage to the device; tested at typical operating conditions.
3. Absolute maximum DC current on the inputs = 100 mA, no latch-up or device damage occurs.
Table 6. Recommended Operating Conditions
Parameter
Ambient Operating Temperature
VDD1 Supply Voltage
VDD2 Supply Voltage
Input Voltage Range
[1]
Symbol
T
A
V
DD1
V
DD2
V
IN+
, V
IN–
Min.
–40
4.5
3
–200
Max.
+105
5.5
5.5
+200
Units
°C
V
V
mV
Notes:
1. ±200 mV is the nominal input range. Full scale input range (FSR) is ±300 mV. Functional input range is ±2 V.
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