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High-Voltage, Internally Powered
ISOLATION AMPLIFIER
ISO107
FEATURES
q
SIGNAL AND POWER IN ONE
TRIPLE-WIDE PACKAGE
q
8000Vpk TEST VOLTAGE
q
2500Vrms CONTINUOUS AC BARRIER
RATING
q
WIDE INPUT SIGNAL RANGE:
10V to +10V
q
WIDE BANDWIDTH: 20kHz Small Signal,
20kHz Full Power
q
BUILT-IN ISOLATED POWER:
10V to
18V Input,
50mA Output
q
MULTICHANNEL SYNCHRONIZATION
CAPABILITY (TTL)
DESCRIPTION
The ISO107 isolation amplifier provides both signal
and power across an isolation barrier. The ceramic
side-brazed hybrid package contains a transformer-
coupled DC/DC converter and a capacitor-coupled
signal channel.
Extra power is available on the isolated input side for
external input conditioning circuitry. The converter is
protected from shorts to ground with an internal cur-
rent limit, and the soft-start feature limits the initial
currents from the power source. Multiple-channel syn-
chronization can be accomplished by applying a TTL
clock signal to paralleled Sync pins. The Enable con-
trol is used to turn off transformer drive while keeping
the signal channel demodulator active. This feature
provides a convenient way to reduce quiescent current
for low power applications.
The wide barrier pin spacing and internal insulation
allow for the generous 2500Vrms continuous rating.
Reliability is assured by 100% barrier breakdown
testing that conforms to UL544 test methods. Low
barrier capacitance minimizes AC leakage currents.
These specifications and built-in features make the
ISO107 easy to use, as well as providing for compact
PC board layouts.
Duty Cycle
Modulator
Oscillator
Driver
V
OUT
+V
CC1
Enable
V
CC2
V
CC1
Gnd 1
Com 1
V
IN
Sense
+V
CC2
Sync
Gnd 2
Rectifiers
Filters
Com 2
Sync
Duty Cycle
Demodulator
ISO107 BLOCK DIAGRAM
APPLICATIONS
q
MULTICHANNEL ISOLATED DATA
ACQUISITION
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BIOMEDICAL INSTRUMENTATION
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POWER SUPPLY AND MOTOR CONTROL
q
GROUND LOOP ELIMINATION
1989 Burr-Brown Corporation
PDS-898C
Printed in U.S.A. October, 1993
ISO107
2
SPECIFICATIONS
ELECTRICAL
T
A
= +25
C and V
CC2
=
15V,
15mA output current unless otherwise noted.
PARAMETERS
CONDITIONS
MIN
TYP
MAX
UNITS
ISOLATION
Rated Continuous Voltage
(1)
AC, 60Hz
T
MIN
to T
MAX
2500
Vrms
DC
T
MIN
to T
MAX
3500
VDC
Test Breakdown, AC, 60Hz
10s
8000
Vpk
Isolation-Mode Rejection
2500Vrms, 60Hz
100
dB
2121VDC
160
dB
Barrier Impedance
10
12
|| 13
|| pF
Leakage Current
240Vrms, 60Hz
1.2
2
A
GAIN
Nominal
1
V/V
Initial Error
0.1
0.25
% FSR
Gain vs Temperature
50
120
ppm/
C
Nonlinearity
0.01
0.025
% FSR
INPUT OFFSET VOLTAGE
Initial Offset
20
50
mV
vs Temperature
150
400
V/
C
vs Power Supplies
V
CC2
=
10V to
18V
2
mV/V
INPUT
Voltage Range
Output Voltage in Range
10
15
V
Resistance
200
k
SIGNAL OUTPUT
Voltage Range
10
12.5
V
Current Drive
5
15
mA
Ripple Voltage, 800kHz Carrier (See Figure 4)
20
mVp-p
Capacitive Load Drive
1000
pF
Voltage Noise
4
V/
Hz
FREQUENCY RESPONSE
Small Signal Bandwidth
20
kHz
Slew Rate
1.5
V/
s
Settling Time
0.1%, 10/10V
75
s
POWER SUPPLIES
Rated Voltage, V
CC2
15
V
Voltage Range
10
18
V
Input Current
I
O
=
15mA
(2)
+75/4.5
mA
Ripple Current
No Filter
10
mAp-p
C
IN
= 1
F
3
mAp-p
Rated Output Voltage
14.25
15
15.75
V
Output Current
Balanced Load
15
50
mA
Single
30
100
mA
Load Regulation
Balanced Load
0.5
%/mA
Line Regulation
1.18
V/V
Output Voltage vs Temperature
10
mV/
C
Voltage Balance Error,
V
CC1
0.05
%
Voltage Ripple
No External Capacitors
10
mVp-p
Output Capacitive Load (See Figure 1)
1
F
Sync Frequency
Sync-Pin Grounded
(3)
1.6
MHz
TEMPERATURE RANGE
Specification
25
+85
C
Operating
25
+85
C
Storage
25
+125
C
NOTES: (1) Conforms to UL544 test methods. 100% tested at 2500Vrms for 1 minute. (2) For other conditions, see Performance Curve, Input Current (+V
CC2
) vs Output
Current. Input Current (V
CC2
) is constant at 4.5mA (typ) for all output currents. (3) If using external synchronization with a TTL-level clock, frequency should be between
1.2MHz and 2MHz with a duty-cycle greater than 25%.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
3
ISO107
ABSOLUTE MAXIMUM RATINGS
Supply Without Damage ....................................................................
18V
V
IN
, Sense Voltage ............................................................................
50V
Com 1 to Gnd 1 or Com 2 to Gnd 2 ...........................................
200mV
Enable, Sync ........................................................................... 0V to +V
CC2
Continuous Isolation Voltage ..................................................... 2500Vrms
V
ISO
, dv/dt ...................................................................................... 20kV/
s
Junction Temperature ...................................................................... 150
C
Storage Temperature ..................................................... 25
C to +125
C
Lead Temperature, (soldering, 10s) ................................................ 300
C
Output Short to Gnd 2 Duration .............................................. Continuous
V
CC1
to Gnd 1 Duration .......................................................... Continuous
PIN CONFIGURATION
PACKAGE INFORMATION
(1)
PACKAGE DRAWING
MODEL
PACKAGE
NUMBER
ISO107
32-Pin Side-Braze Ceramic
210
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix D of Burr-Brown IC Data Book.
Top View
DIP
1
2
3
4
32
31
30
29
20
19
18
17
13
14
15
16
NC
+V
NC
V
CC1
CC1
Com 2
V
Sense
Gnd 2
OUT
NC
Gnd 1
V
Com 1
IN
V
Sync*
+V
Enable
CC2
CC2
*Operation requires that this pin be grounded or driven with TTL levels.
ELECTROSTATIC
DISCHARGE SENSITIVITY
Any integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with ap-
propriate precautions. Failure to observe proper handling and
installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric
changes could cause the device not to meet published speci-
fications.
ISO107
4
TYPICAL PERFORMANCE CURVES
T
A
= +25
C, V
CC2
=
15VDC,
15mA output current unless otherwise noted.
RECOMMENDED RANGE OF ISOLATION VOLTAGE
10k
10
100
1k
10k
100k
Maximum Isolation Voltage (Vpk)
Isolation Voltage Frequency (Hz)
3.5k
1k
100
10
1
1M
Operational
Region
Barrier Voltage Rating
Non-Specified
Signal Operation
PSRR vs FREQUENCY
Supply Modulation Frequency (Hz)
100
1k
10k
100k
60
54
40
20
0
Power Supply Rejection Ratio (dB)
V
CC2
+V
CC2
20
10
0
10
20
Output Voltage (V)
Time (s)
0
50
100
LARGE SIGNAL TRANSIENT RESPONSE
IMR/LEAKAGE vs FREQUENCY
120
100
80
60
40
20
10
100
1k
10k
100k
Isolation-Mode Rejection (dB)
10mA
1mA
100A
10A
1A
100nA
Barrier Leakage Current (rms)
Isolation Voltage Frequency (Hz)
Leakage at
240 Vrms
Leakage at
2500 Vrms
IMR
GAIN/PHASE vs FREQUENCY
3
0
3
6
9
12
15
45
0
45
90
135
180
225
300
1k
3k
30k
100k
Small Signal Frequency (Hz)
Gain (dB)
Phase Shift ()
100
10k
Gain
Phase
ISOLATED POWER SUPPLY
LOAD REGULATION AND EFFICIENCY
18
16
14
12
10
60
45
30
15
0
10
20
30
40
50
20
40
60
80
100
V Supply Output Current (mA)
CC1
V Output Voltage (V)
CC1
Balanced Load Efficiency
Output Voltage
Balanced Loads
Output Voltage
Single-Ended Loads
Efficiency (%)
0
0
5
ISO107
TYPICAL PERFORMANCE CURVES
(CONT)
T
A
= +25
C, V
CC2
=
15VDC,
15mA output current unless otherwise noted.
ISOLATED POWER SUPPLY LINE REGULATION
+V (V)
CC2
V (V)
CC1
19
18
17
16
15
14
13
12
11
10
9
15mA Load
1.18 V/V
9
10
11
12
13
14
15
16
17
18
19
ISOLATED POWER SUPPLY VOLTAGE
vs TEMPERATURE
Temperature (C)
2
1
0
1
2
25
0
25
50
75
100
V (%)
CC1
ISOLATED SUPPLY VOLTAGE AND V
vs SYNC FREQUENCY
Sync Frequency (MHz)
5
2.5
0
2.5
5
1
1.5
2
2.5
V (mV)
OS
OS
V (mV)
CC1
50
25
0
25
50
V
CC1
V
OS
+V
CC1
Supply Balanced Output Current (mA)
+V
CC2
= 15V
ISOLATED POWER SUPPLY
INPUT CURRENT vs OUTPUT CURRENT
145
120
95
70
V
CC2
Input Current (mA)
0
45
10
20
30
40
50
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