HCPL7800 Agilent Technologies, Inc., HCPL7800 Datasheet

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HCPL7800

Manufacturer Part Number
HCPL7800
Description
Manufacturer
Agilent Technologies, Inc.
Datasheet

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1-216
High CMR Isolation Amplifiers
Technical Data
Features
• 15 kV/ s Common-Mode
• Compact, Auto-Insertable
• 4.6 V/ C Offset Drift vs.
• 0.9 mV Input Offset Voltage
• 85 kHz Bandwidth
• 0.1% Nonlinearity
• Worldwide Safety Approval:
• Advanced Sigma-Delta (
• Fully Differential Circuit
• 1 m CMOS IC Technology
Applications
• Motor Phase Current
• General Purpose Current
• High-Voltage Power Source
*The terms common-mode rejection
(CMR) and isolation-mode rejection (IMR)
are used interchangeably throughout this
data sheet.
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.
Rejection at V
Standard 8-pin DIP Package
Temperature
UL 1577 (3750 V rms/1 min),
VDE 0884 and CSA
A/D Converter Technology
Topology
Sensing
Sensing
Voltage Monitoring
CM
= 1000 V*
)
• Switch-Mode Power Supply
• General Purpose Analog
• Transducer Isolation
Description
The HCPL-7800 high CMR
isolation amplifier provides a
unique combination of features
ideally suited for motor control
circuit designers. The product
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.
This product paves the way for a
smaller, lighter, easier to produce,
high noise rejection, low cost
solution to motor current
sensing. The product can also be
used for general analog signal
isolation applications requiring
high accuracy, stability and
linearity under similarly severe
noise conditions. For general
Signal Isolation
Signal Isolation
H
HCPL-7800
HCPL-7800A
HCPL-7800B
applications, we recommend the
HCPL-7800 which exhibits a
part-to-part gain tolerance of
HP offers the HCPL-7800A and
HCPL-7800B, each with part-to-
part gain tolerances of
The HCPL-7800 utilizes sigma-
delta (
converter technology, chopper
stabilized amplifiers, and a fully
differential circuit topology
fabricated using HP’s 1 m
CMOS IC process. The part also
couples our high-efficiency, high-
speed AlGaAs LED to a high-
speed, noise-shielded detector
Functional Diagram
GND1
V
V
V
DD1
5%. For precision applications,
IN+
IN-
1
2
3
4
I
I
IN
CMR SHIELD
DD1
) analog-to-digital
+
-
+
-
I
DD2
I
O
5965-3592E
1%.
6
8
7
5
V
V
V
GND2
DD2
OUT+
OUT-

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HCPL7800 Summary of contents

Page 1

High CMR Isolation Amplifiers Technical Data Features • 15 kV/ s Common-Mode Rejection 1000 V* CM • Compact, Auto-Insertable Standard 8-pin DIP Package • 4 Offset Drift vs. Temperature • 0.9 mV Input Offset Voltage ...

Page 2

Together, these features deliver unequaled isolation-mode noise Ordering Information: HCPL-7800x No Specifier = Gain Tol.; Mean Gain Value = 7. Gain Tol.; Mean Gain Value = 8.07 ...

Page 3

Gull Wing Surface Mount Option 300* 9.65 ± 0.25 (0.380 ± 0.010 7800 YYWW MOLDED 1.19 (0.047) MAX. 1.080 ± 0.320 (0.043 ± 0.013) 2.540 (0.100) BSC DIMENSIONS IN MILLIMETERS (INCHES). TOLERANCES (UNLESS ...

Page 4

Regulatory Information The HCPL-7800 has been approved by the following organizations: UL Recognized under UL 1577, Component Recognition Program, File E55361. Insulation and Safety Related Specifications Parameter Symbol Min. External Air Gap L(IO1) (External Clearance) Min. External Tracking L(IO2) Path ...

Page 5

Absolute Maximum Ratings Parameter Storage Temperature Ambient Operating Temperature Supply Voltages Steady-State Input Voltage Two Second Transient Input Voltage Output Voltages Lead Solder Temperature (1.6 mm below seating plane, 10 sec.) Reflow Temperature Profile Recommended Operating Conditions Parameter Ambient Operating ...

Page 6

DC Electrical Specifications All specifications and figures are at the nominal operating condition of V 5.0 V, and V = 5.0 V, unless otherwise noted. DD2 Parameter Symbol Input Offset Voltage V OS Input Offset Drift vs Temperature ...

Page 7

AC Electrical Specifications All specifications and figures are at the nominal operating condition 5.0 V, and V = 5.0 V, unless otherwise noted. DD1 DD2 Parameter Symbol Rising Edge Isolation IMR Mode Rejection Falling Edge Isolation ...

Page 8

Notes: General Note: Typical values represent the mean value of all characterization units at the nominal operating conditions. Typical drift specifications are determined by calculating the rate of change of the speci- fied parameter versus the drift parameter (at nominal ...

Page 9

Short circuit current is the amount of output current generated when either output is shorted ground. DD2 26. IMR (also known as CMR or Common Mode Rejection) specifies the mini- mum rate of rise of an ...

Page 10

MEAN ± 2 SIGMA 400 200 0 -200 -400 -600 4.4 4.6 4.8 5.0 5.2 5.4 5.6 V – INPUT SUPPLY VOLTAGE – V DD1 Figure 3. Input-Referred Offset Drift vs V). DD1 DD2 +5 ...

Page 11

MEAN ± 2 SIGMA 0.10 0.05 0 -0.05 -0.10 -40 - 100 T – TEMPERATURE – °C A Figure 10. 200 mV Nonlinearity Drift vs. Temperature. 0.15 0.10 0.05 0 -0.05 -0.10 -0.15 MEAN ...

Page 12

HCPL-7800 OUT 2 7 0.1 µF 0.1 µ PULSE GEN Figure 19. Isolation Mode Rejection Test Circuit Figure 20. Typical IMR Failure ...

Page 13

OUT +5 V HCPL-7800 0.1 µ 0.01 µF 4 Figure 22. Propagation Delay and Rise/Fall Time Test Circuit -10 -1 -15 -2 -30 -3 -45 AMPLITUDE PHASE -4 -60 ...

Page 14

FLOATING POSITIVE SUPPLY HV+ GATE DRIVE CIRCUIT IN OUT U1 78L05 C1 0.1 µ MOTOR - + R SENSE HV- Figure 26. Recommended Application Circuit. 400 OUTPUT POWER INPUT POWER 300 200 100 0 ...

Page 15

Circuit Information The recommended application circuit is shown in Figure 26. A floating power supply (which in many applications could be the same supply that is used to drive the high-side power transistor) is regulated using a ...

Page 16

To maintain circuit accuracy recommended that the sense resistor and the isolation amplifier circuit be located as close as ...

Page 17

Figure 30. Application Circuit Sine Wave Response. Figure 31. Application Circuit Square Wave Response. Figure 32. Application Circuit Overload Recovery Waveform. 1-232 ...

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