ISO122_15 Datasheet, PDF (1/26 Pages) Texas Instruments – Precision Lowest-Cost Isolation Amplifier

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
ISO122
SBOS160A – NOVEMBER 1993 – REVISED JANUARY 2015
ISO122 Precision Lowest-Cost Isolation Amplifier
1 Features
•1 100% Tested for High-Voltage Breakdown
• Rated 1500 Vrms
• High IMR: 140 dB at 60 Hz
• Bipolar Operation: V_O = ±10 V
• 16-Pin Plastic DIP and 28-Lead SOIC
• Ease of Use: Fixed Unity Gain Configuration
• 0.020% Maximum Nonlinearity
• ±4.5-V to ±18-V Supply Range
2 Applications
• Industrial Process Control:
– Transducer Isolator, Isolator for
Thermocouples, RTDs, Pressure Bridges, and
Flow Meters, 4-mA to 20-mA Loop Isolation
• Ground Loop Elimination
• Motor and SCR Control
• Power Monitoring
• PC-Based Data Acquisition
• Test Equipment
3 Description
The ISO122 is a precision isolation amplifier
incorporating a novel duty cycle modulation-
demodulation technique. The signal is transmitted
digitally across a 2-pF differential capacitive barrier.
With digital modulation the barrier characteristics do
not affect signal integrity, thus 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 ISO122 is easy to use. No external components
are required for operation. The key specifications are
0.020% maximum nonlinearity, 50-kHz signal
bandwidth, and 200-V/°C V_OS drift. A power supply
range of 4.5 V to 18 V and quiescent currents of 5
mA on V_S1 and ±5.5 mA on V_S2 make the ISO122
ideal for a wide range of applications.
The ISO122 is available in 16-pin plastic DIP and
28-lead plastic surface-mount packages.
PART NUMBER
ISO122
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
PDIP (16)
17.90 mm × 7.50 mm
SOIC (28)
20.01 mm × 6.61 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
V
V
IN
OUT
–V
S1
Gnd
+V
S1
–V
S2
Gnd
+V
S2
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.