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.

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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. 825-3164
Mfr. Part No.AMC1200SDUBR
kr 51,795
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 47,186
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. 817-5786
Mfr. Part No.AMC1100DUB
kr 52,24
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. 121-9701
Mfr. Part No.AMC1100DUB
kr 43,601
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. 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. 121-8514
Mfr. Part No.ISO124U
kr 179,839
Each (In a Tube of 20)
Units
- - - - - - - - - - - - - -
RS Stock No. 817-5789
Mfr. Part No.AMC1200SDUB
kr 52,64
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. 106-7013
Mfr. Part No.AD202JN
kr 735,997
Each (In a Tube of 9)
Units
Single - 15 V 130dB - 1 40dB Through Hole PDIP 11 8.9 x 53.3 x 17.8mm 8.9mm 17.8mm 53.3mm
RS Stock No. 758-9579
Mfr. Part No.AD204KN
kr 908,87
Each
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. 300-8243
Mfr. Part No.ISO124P
kr 180,66
Each
Units
Dual ±12 V, ±15 V, ±5 V, ±9 V - - - 1 0dB Through Hole PDIP 8 3.94 x 20.01 x 6.61mm 3.94mm 6.61mm 20.01mm
RS Stock No. 168-9952
Mfr. Part No.SI8261ACA-C-IS
kr 9,659
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. 127-0272
Mfr. Part No.AD202JN
kr 747,45
Each
Units
Single - 15 V 130dB - 1 40dB Through Hole PDIP 11 8.9 x 53.3 x 17.8mm 8.9mm 17.8mm 53.3mm
RS Stock No. 145-7696
Mfr. Part No.ADUM3190BRQZ
kr 19,023
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. 106-7018
Mfr. Part No.AD202JY
kr 728,441
Each (In a Tube of 9)
Units
Single - 15 V 130dB - 1 40dB Through Hole SIP 11 15.9 x 52.8 x 6.6mm 15.9mm 6.6mm 52.8mm
RS Stock No. 768-7897
Mfr. Part No.ACPL-C87A-000E
BrandBroadcom
kr 56,03
Each
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