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PDF ISO124U Data sheet ( Hoja de datos )
| Número de pieza | ISO124U | |
| Descripción | Precision Lowest Cost ISOLATION AMPLIFIER | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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®
ISO124
ISO124
ISO124
Precision Lowest Cost
ISOLATION AMPLIFIER
FEATURES
q 100% TESTED FOR HIGH-VOLTAGE
BREAKDOWN
q RATED 1500Vrms
q HIGH IMR: 140dB at 60Hz
q 0.010% max NONLINEARITY
q BIPOLAR OPERATION: VO = ±10V
q 16-PIN PLASTIC DIP AND 28-LEAD SOIC
q EASE OF USE: Fixed Unity Gain
Configuration
q ±4.5V to ±18V SUPPLY RANGE
APPLICATIONS
q INDUSTRIAL PROCESS CONTROL:
Transducer Isolator, Isolator for Thermo-
couples, RTDs, Pressure Bridges, and
Flow Meters, 4mA to 20mA Loop Isolation
q GROUND LOOP ELIMINATION
q MOTOR AND SCR CONTROL
q POWER MONITORING
q PC-BASED DATA ACQUISITION
q TEST EQUIPMENT
DESCRIPTION
The ISO124 is a precision isolation amplifier incor-
porating a novel duty cycle modulation-demodulation
technique. The signal is transmitted digitally across
a 2pF differential capacitive barrier. With digital modu-
lation the barrier characteristics do not affect signal
integrity, resulting in excellent reliability and good high
frequency transient immunity across the barrier. Both
barrier capacitors are imbedded in the plastic body of
the package.
The ISO124 is easy to use. No external components
are required for operation. The key specifications are
0.010% max nonlinearity, 50kHz signal bandwidth,
and 200µV/°C VOS drift. A power supply range of
±4.5V to ±18V and quiescent currents of ±5.0mA on
VS1 and ±5.5mA on VS2 make these amplifiers ideal
for a wide range of applications.
The ISO124 is available in 16-pin plastic DIP and 28-
lead plastic surface mount packages.
VIN VOUT
–VS2
Gnd
+VS2
–VS1
Gnd
+VS1
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1997 Burr-Brown Corporation
PDS-11405A
ISO124Printed in U.S.A. September, 1997
®
1 page  
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C, and VS = ±15V, unless otherwise noted.
PSRR vs FREQUENCY
60
54
40
+VS1, +VS2
–VS1, –VS2
20
0
1
10
100
1k
10k 100k
1M
Frequency (Hz)
100mA
ISOLATION LEAKAGE CURRENT vs FREQUENCY
10mA
1mA
100µA
1500Vrms
10µA
1µA
240Vrms
0.1µA
1
10
100
1k
10k 100k
1M
Frequency (Hz)
SIGNAL RESPONSE TO
INPUTS GREATER THAN 250kHz
VOUT/VIN
100kHz
0
Frequency
Out 250
–10 200
–20 150
–30 100
–40 50
0 500k 1M 1.5M
Input Frequency (Hz)
(NOTE: Shaded area shows aliasing frequencies that
cannot be removed by a low-pass filter at the output.)
®
5 ISO124
5 Page 
VIN, up to
±10V Swing
+15V
9
ISO124
10
2
1 16
–15V
7
VOUT
8
+5V
Regulator
MC78L05
0.1µF 0.1µF
13
21
–5V
Regulator
MC79L05
32
0.47µF
0.47µF 0.47µF
76
5
DCP011515
21
NOTE: The input supplies can be subregulated to ±5V to reduce
PSR related errors without reducing the ±10V input range.
FIGURE 9. Improved PSR Using External Regulator.
VS INPUT RANGE
(V) (V)(1)
20+ –2 to +10
15 –2 to +5
12 –2 to +2
Signal Source
VIN
+ RS
VS1 (+15V)
7
INA105
Difference Amp
2 5 10kΩ
R1 R2
1
+VS2 (+15V)
3 R3
R4
4 Reference
6
1 RC(1)
IN4689
5.1V
15 In
9
ISO124
Gnd
16
10
7
8
VOUT = VIN
Com 2
2
–VS1
–VS2 (–15V)
NOTE: (1) Select to match RS .
NOTE: Since the amplifier is unity gain, the input
range is also the output range. The output can go
to –2V since the output section of the ISO amp
operates from dual supplies.
FIGURE 10. Single Supply Operation of the ISO124 Isolation Amplifier. For additional information refer to AB-009.
11 ISO124
®
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet ISO124U.PDF ] | |
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