HCPL7840 Agilent(Hewlett-Packard), HCPL7840 Datasheet

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HCPL7840

Manufacturer Part Number
HCPL7840
Description
Analog Isolation Amplifier
Manufacturer
Agilent(Hewlett-Packard)
Datasheet
1.HCPL7840.pdf (12 pages)

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1-248
Analog Isolation Amplifier
Technical Data
Features
• High Common Mode
• 5% Gain Tolerance
• 0.1% Nonlinearity
• Low Offset Voltage and Off-
• 100 kHz Bandwidth
• Performance Specified Over
• Recognized Under UL 1577
• Standard 8-Pin DIP Package
Applications
• Motor Phase and Rail
• Inverter Current Sensing
• Switched Mode Power
• General Purpose Current
• General Purpose Analog
A 0.1 F 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.
Rejection (CMR): 15 kV/ s
at V
set Temperature Coefficient
-40 C to 85 C Temperature
Range
and CSA Approved for
Dielectric Withstand Proof
Test Voltage of 2500 Vac, 1
Minute
Current Sensing
Supply Signal Isolation
Sensing and Monitoring
Signal Isolation
CM
= 1000 V
Description
The HCPL-7840 isolation ampli-
fier provides accurate, electrically
isolated and amplified representa-
tions of voltage and current.
When used with a shunt resistor
in the current path, the HCPL-
7840 offers superior reliability,
cost effectiveness, size and
autoinsertability compared with
the traditional solutions such as
current transformers and Hall-
effect sensors.
The HCPL-7840 consists of a
sigma-delta analog-to-digital
converter optically coupled to a
digital-to-analog converter.
Superior performance in design
critical specifications such as
common-mode rejection, offset
voltage, nonlinearity, operating
temperature range and regulatory
compliance make the HCPL-7840
the clear choice for designing
reliable, lower-cost, reduced-size
products such as motor
controllers and inverters.
Common-mode rejection of
15 kV/ s makes the HCPL-7840
suitable for noisy electrical
HCPL-7840
environments such as those
generated by the high switching
rates of power IGBTs.
Low offset voltage together with
a low offset voltage temperature
coefficient permits accurate use
of auto-calibration techniques.
Gain tolerance of 5% with 0.1%
nonlinearity further provide the
performance necessary for
accurate feedback and control.
A wide operating temperature
range with specified performance
allows the HCPL-7840 to be used
in hostile industrial environments.
Functional Diagram
H
GND1
V
V
V
DD1
IN+
IN–
1
2
3
4
I
DD1
+
–
SHIELD
+
–
I
DD2
5965-4784E
8
7
5
6
V
V
V
GND2
DD2
OUT+
OUT–

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HCPL7840 Summary of contents

Page 1

Analog Isolation Amplifier Technical Data Features • High Common Mode Rejection (CMR 1000 V CM • 5% Gain Tolerance • 0.1% Nonlinearity • Low Offset Voltage and Off- set Temperature Coefficient • 100 kHz ...

Page 2

Ordering Information HCPL-7840#xxx Option data sheets available. Contact your Hewlett-Packard sales representative or authorized distributor for more information. Package Outline Drawings Standard DIP Package 9.65 ± 0.25 (0.380 ± 0.010 7840 1 2 1.19 (0.047) MAX. 1.080 ...

Page 3

Maximum Solder Reflow Thermal Profile 260 240 220 T = 115°C, 0.3°C/SEC 200 180 160 140 120 100 100°C, 1.5°C/SEC TIME – MINUTES (NOTE: USE OF NON-CHLORINE ...

Page 4

Recommended Operating Conditions Parameter Ambient Operating Temperature Supply Voltages Input Voltage DC Electrical Specifications All specifications, typicals and figures are at the nominal operating conditions and ...

Page 5

AC Electrical Specifications All specifications, typicals and figures are at the nominal operating conditions and unless otherwise noted. A DD1 DD2 Parameter Symbol Min. Common Mode ...

Page 6

Notes brought above IN- DD1 with respect to GND1 an internal test mode may be activated. This test mode is not intended for customer use. 2. Exact offset value is dependent on ...

Page 7

V DD1 1 0.1 µF 404 HCPL-7840 13.2 3 0.01 µF 4 Figure 5. Gain and Nonlinearity Test Circuit. 0.1 0 -0.1 -0.2 -0 DD1 DD2 -0.4 -0.5 -40 ...

Page 8

T = 85°C 5. 25° -40°C A 0.50 0. DD1 DD2 0.01 0 ±0.10 ±0.20 ±0.30 ±0.40 FS – FULL-SCALE INPUT VOLTAGE – V Figure 12. ...

Page 9

DD1 DD2 ° 100 500 f – FREQUENCY – kHz Figure 19. Amplitude Response vs. Frequency. Applications Information Functional ...

Page 10

Avoid using sockets, as they will typically increase both loop area and inductance. And finally, using capacitors with small body size and orienting ...

Page 11

The particular op-amp used in the post-amp is not critical; however, it should have low enough offset and high enough bandwidth and slew rate so that it does not adversely affect circuit perfor- mance. The ...

Page 12

VOLTAGE CLOCK REGULATOR GENERATOR ISO-AMP ENCODER MODULATOR INPUT Figure 22. HCPL-7840 Block Diagram. POSITIVE FLOATING SUPPLY HV+ GATE DRIVE CIRCUIT U1 78L05 IN OUT C1 0.1 µF MOTOR + – • • • R SENSE • • • HV– Figure ...

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