HCPL-7800B Avago Technologies, HCPL-7800B Datasheet

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HCPL-7800B

Manufacturer Part Number
HCPL-7800B
Description
Manufacturer
Avago Technologies
Datasheet
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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HCPL-7800B Summary of contents

Page 1

... HCPL-7800A HCPL-7800B applications, we recommend the HCPL-7800 which exhibits a part-to-part gain tolerance of 5%. For precision applications, HP offers the HCPL-7800A and HCPL-7800B, each with part-to- part gain tolerances of 1%. The HCPL-7800 utilizes sigma- delta ( ) analog-to-digital converter technology, chopper stabilized amplifiers, and a fully differential circuit topology fabricated using HP’ ...

Page 2

... DIP package that meets worldwide regulatory safety standards (gull-wing surface mount option #300 also available). 0.20 (0.008) 0.33 (0.013) 5° TYP. PIN DIAGRAM DD1 DD2 IN+ OUT IN– OUT– 4 GND1 GND2 5 HCPL-7800A = 7800A HCPL-7800B = 7800B 1-217 ...

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 (External Creepage) Min. Internal Plastic Gap ...

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

... HP recommends the use of non- chlorine activated fluxes. 2. The HCPL-7800 will operate properly at ambient temperatures up to 100 C but may not meet published specifi- cations under these conditions performance can be best ...

Page 9

... V OUT AD624CD - GAIN = 1000 0.1 µF 0.33 µF -15 V 29. Data sheet value is the differential amplitude of the transient at the output of the HCPL-7800 when MHz square wave with 5 ns pk-pk rise and fall times is applied to both V and V . DD1 DD2 30. This is a two-terminal measurement: pins 1-4 are shorted together and pins 5-8 are shorted together ...

Page 10

... V – INPUT SUPPLY VOLTAGE – V DD1 Figure 3. Input-Referred Offset Drift vs V). DD1 DD2 + 0.1 µF HCPL-7800 0.1 µ 0.01 µ 0.33 µF Figure 5. Gain and Nonlinearity Test Circuit. 0.5 0 -0.5 -1.0 -1.5 MEAN ± 2 SIGMA -2 ...

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 Waveform. 330 pF 5. +15 V 0.1 µF 0.1 µF 1. OP-42 + 1.00 K 0.1 µF 5.11 K 330 pF -15 V 1000 PERTURBATION (DEFINITION OF 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 -60 100 500 1000 5000 10000 50000 100000 f – FREQUENCY – Hz Figure 23. Typical Amplitude and Phase Response vs. Frequency. ...

Page 14

... Figure 27. Dependence of Safety- Limiting Parameters on Ambient Temperature. Applications Information Functional Description Figure 28 shows the primary functional blocks of the HCPL- 7800. In operation, the sigma- delta analog-to-digital converter converts the analog input signal into a high-speed serial bit stream, the time average of which is directly proportional to the input signal ...

Page 15

... V using a simple three-terminal voltage regulator. The input of the HCPL-7800 is connected directly to the current sensing resistor. The differential output of the isolation amplifier is converted to a ground-referenced single-ended output voltage with a simple differential amplifier circuit ...

Page 16

... CLOCK REGULATOR GENERATOR ISO-AMP ENCODER MODULATOR INPUT Figure 28. HCPL-7800 Block Diagram. Figure 29. PC Board Trace Pattern and Loading Diagram Example. Figures 30 and 31 illustrate the response of the overall isolation amplifier circuit shown in Figure 26. Figure 30 shows the response of the circuit to a 200 mV 20 ...

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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