Isolation Amplifiers

Isolation Amplifiers are instruments that have been designed to measure the smallest current and voltage signals in the presence of high common mode voltage by providing electrical safety barrier and electrical isolation. They are differential amplifiers that protect data acquisition components from common mode voltages, which are potential differences between instrument ground and signal ground.

How to select a correct isolation amplifier?
There are two main types of isolation amplifiers and the decision of using one or another may depend on several aspects and user needs:

• Single-ended, floating common - an isolated and quasi-balanced input (the floating common is typically connected to the (-) input of differential amplifier). Suitable for off-ground measurements up to breakdown voltage of the isolation barrier, and exhibits very good common mode rejection (100 dB typical).

• Differential, floating common - an isolated and balanced input. Suitable for off-ground measurements of the breakdown voltage of the isolation barrier, and exhibits superb common mode rejection (>120 dB).

What is typical application of isolation amplifiers?
Isolation amplifiers are commonly used in test and measurement or medical devices. Also, they are popular in solar and fuel cells construction to profile the performance of individual series-connected voltage cells.

...
Read more Read less

Filters

Viewing 1 - 20 of 107 products
Results per page
Description Price Power Supply Type Typical Dual Supply Voltage Typical Single Supply Voltage Isolation Mode Rejection Rail to Rail Number of Channels per Chip Maximum Voltage Gain Mounting Type Package Type Pin Count Dimensions Height Width Length
RS Stock No. 450-903
Mfr. Part No.HCPL-7800A-300E
BrandBroadcom
kr 105,58
Each
Units
Single - 5 V 76dB - 1 18.14dB Surface Mount PDIP SMD 8 3.56 x 9.8 x 6.35mm 3.56mm 6.35mm 9.8mm
RS Stock No. 922-5665
Mfr. Part No.HCPL-7800A-300E
BrandBroadcom
kr 91,481
Each (In a Tube of 50)
Units
Single - 5 V 76dB - 1 18.14dB Surface Mount PDIP SMD 8 3.56 x 9.8 x 6.35mm 3.56mm 6.35mm 9.8mm
RS Stock No. 121-8514
Mfr. Part No.ISO124U
kr 168,982
Each (In a Tube of 20)
Units
- - - - - - - - - - - - - -
RS Stock No. 817-5786
Mfr. Part No.AMC1100DUB
kr 45,86
Each
Units
Dual 5V - 108dB - 1 - Surface Mount SOP 8 9.55 x 6.67 x 3.35mm 3.35mm 6.67mm 9.55mm
RS Stock No. 300-8259
Mfr. Part No.ISO124U
kr 178,46
Each
Units
Dual ±12 V, ±15 V, ±5 V, ±9 V - - - 1 0dB Surface Mount SOP 8 2.3 x 17.9 x 7.5mm 2.3mm 7.5mm 17.9mm
RS Stock No. 803-0747
Mfr. Part No.ACPL-782T-300E
BrandBroadcom
kr 110,87
Each
Units
- - - - - - - Surface Mount DIP - - - - -
RS Stock No. 178-3173
Mfr. Part No.ACPL-782T-300E
BrandBroadcom
kr 92,406
Each (In a Tube of 50)
Units
- - - - - - - - - - - - - -
RS Stock No. 921-3000
Mfr. Part No.AMC1200SDUBR
kr 32,498
Each (On a Reel of 350)
Units
Single - 5 V 108dB - 1 8dB Surface Mount SOP 8 9.55 x 6.67 x 3.35mm 3.35mm 6.67mm 9.55mm
RS Stock No. 121-9701
Mfr. Part No.AMC1100DUB
kr 38,717
Each (In a Tube of 50)
Units
Dual 5V - 108dB - 1 - Surface Mount SOP 8 9.55 x 6.67 x 3.35mm 3.35mm 6.67mm 9.55mm
RS Stock No. 817-5789
Mfr. Part No.AMC1200SDUB
kr 48,06
Each
Units
Dual 5V - - - 1 8 Surface Mount SOP 8 9.55 x 6.67 x 3.35mm 3.35mm 6.67mm 9.55mm
RS Stock No. 825-3164
Mfr. Part No.AMC1200SDUBR
kr 40,08
Each (In a Pack of 2)
Units
Single - 5 V 108dB - 1 8dB Surface Mount SOP 8 9.55 x 6.67 x 3.35mm 3.35mm 6.67mm 9.55mm
RS Stock No. 121-9702
Mfr. Part No.AMC1200SDUB
kr 40,638
Each (In a Tube of 50)
Units
Dual 5V - - - 1 8 Surface Mount SOP 8 9.55 x 6.67 x 3.35mm 3.35mm 6.67mm 9.55mm
RS Stock No. 795-1472
Mfr. Part No.Si8261BAA-C-IS
kr 11,844
Each (In a Pack of 5)
Units
Single - 5 → 30 V - Rail to Rail Output 1 - Surface Mount SOIC 8 5 x 4 x 1.55mm 1.55mm 5mm 5mm
RS Stock No. 866-0215
Mfr. Part No.ISO124P
kr 154,986
Each (In a Tube of 25)
Units
Dual ±4.5 → ±18V - 140dB - 1 - Through Hole PDIP 8 21.34 x 7.11 x 4.95mm 4.95mm 7.11mm 21.34mm
RS Stock No. 168-9955
Mfr. Part No.SI8261BAA-C-IS
kr 10,453
Each (In a Tube of 96)
Units
Single - 5 → 30 V - Rail to Rail Output 1 - Surface Mount SOIC 8 5 x 4 x 1.55mm 1.55mm 5mm 5mm
RS Stock No. 145-7696
Mfr. Part No.ADUM3190BRQZ
kr 21,239
Each (In a Tube of 98)
Units
Single - 3 → 20 V - - 2 80dB Surface Mount QSOP 16 5 x 4.01 x 1.65mm 1.65mm 4.01mm 5mm
RS Stock No. 922-5687
Mfr. Part No.HCPL-7800A-000E
BrandBroadcom
kr 90,902
Each (In a Tube of 50)
Units
Single - 5 V 76dB - 1 18.14dB Through Hole PDIP 8 3.56 x 9.8 x 6.35mm 3.56mm 6.35mm 9.8mm
RS Stock No. 922-6765
Mfr. Part No.ACPL-C87A-000E
BrandBroadcom
kr 42,614
Each (In a Tube of 80)
Units
Single - 4.5 → 5.5 V -78dB - 1 1.01V/V Surface Mount SSOP 8 5.85 x 6.807 x 3.18mm 3.18mm 6.807mm 5.85mm
RS Stock No. 145-6786
Mfr. Part No.AD204KN
kr 757,41
Each (In a Tube of 9)
Units
- - - 110dB - 2 1 → 100V/V Through Hole PDIP 10 53.3 x 17.8 x 8.52mm 8.52mm 17.8mm 53.3mm
RS Stock No. 786-3154
Mfr. Part No.ADUM3190BRQZ
kr 25,025
Each (In a Pack of 2)
Units
Single - 3 → 20 V - - 2 80dB Surface Mount QSOP 16 5 x 4.01 x 1.65mm 1.65mm 4.01mm 5mm
Related Products
Texas Instruments’ range of voltage comparators includes not ...
Description:
Texas Instruments’ range of voltage comparators includes not only conventional single, dual and quad comparator packages but also window comparators and over- & under-voltage supervisors.Although comparators and operational amplifiers are superficially similar devices their operation in practical applications ...
The Texas Instruments LM139, LM239, LM339 and LM2901 ...
Description:
The Texas Instruments LM139, LM239, LM339 and LM2901 are quad differential input voltage comparators designed to operate from a single power supply over a wide range of voltages. The common mode input voltage range includes ground and the devices have ...
The range of isolation amplifier optocouplers from Avago ...
Description:
The range of isolation amplifier optocouplers from Avago Technologies is ideal for industrial environments where the optocoupler is used to insulate high voltages and isolate any unwanted signals. Sigma-delta modulator technology allows the current and voltage sensor families to provide ...
The ACNT-H87B/H87A/H870 voltage sensors are optical isolation amplifiers ...
Description:
The ACNT-H87B/H87A/H870 voltage sensors are optical isolation amplifiers designed specifically for voltage sensing. Its 2V input range and high 1GΩ input impedance, make it well suited for isolated voltage sensing requirements in electronic power converter applications including motor drives and ...