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. 922-6731
Mfr. Part No.ACPL-7900-000E
BrandBroadcom
MYR17.832
Each (In a Tube of 50)
units
Single - 3 → 5.5 V - - 1 8.44V/V Through Hole PDIP 8 9.8 x 6.35 x 3.56mm 3.56mm 6.35mm 9.8mm
RS Stock No. 922-5665
Mfr. Part No.HCPL-7800A-300E
BrandBroadcom
MYR39.815
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. 450-903
Mfr. Part No.HCPL-7800A-300E
BrandBroadcom
MYR64.37
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. 734-4988
Mfr. Part No.ACPL-7900-000E
BrandBroadcom
MYR21.00
Each
units
Single - 3 → 5.5 V - - 1 8.44V/V Through Hole PDIP 8 9.8 x 6.35 x 3.56mm 3.56mm 6.35mm 9.8mm
RS Stock No. 450-868
Mfr. Part No.HCPL-7800-300E
BrandBroadcom
MYR37.68
Each
units
Single - 5 V 76dB - 1 18.31dB Surface Mount PDIP SMD 8 3.56 x 9.8 x 6.35mm 3.56mm 6.35mm 9.8mm
RS Stock No. 817-5789
Mfr. Part No.AMC1200SDUB
MYR22.77
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
MYR18.965
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. 922-5655
Mfr. Part No.HCPL-7800-300E
BrandBroadcom
MYR31.854
Each (In a Tube of 50)
units
Single - 5 V 76dB - 1 18.31dB Surface Mount PDIP SMD 8 3.56 x 9.8 x 6.35mm 3.56mm 6.35mm 9.8mm
RS Stock No. 921-3000
Mfr. Part No.AMC1200SDUBR
MYR11.872
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. 121-9702
Mfr. Part No.AMC1200SDUB
MYR20.444
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. 461-8267
Mfr. Part No.ISO122JP
MYR136.14
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. 121-8550
Mfr. Part No.ISO122JP
MYR106.893
Each (In a Tube of 25)
units
- - - - - - - - - - - - - -
RS Stock No. 127-0272
Mfr. Part No.AD202JN
MYR373.52
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. 178-3187
Mfr. Part No.HCPL-7510-300E
BrandBroadcom
MYR18.61
Each (In a Tube of 50)
units
Single - 4.5 → 5.5 V - - 1 4/0.512V/V Through Hole PDIP 8 9.8 x 6.35 x 3.56mm 3.56mm 6.35mm 9.8mm
RS Stock No. 106-7013
Mfr. Part No.AD202JN
MYR342.527
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. 818-8357
Mfr. Part No.HCPL-7510-300E
BrandBroadcom
MYR21.92
Each (In a Pack of 2)
units
Single - 4.5 → 5.5 V - - 1 4/0.512V/V Through Hole PDIP 8 9.8 x 6.35 x 3.56mm 3.56mm 6.35mm 9.8mm
RS Stock No. 922-6510
Mfr. Part No.ACPL-7900-300E
BrandBroadcom
MYR18.61
Each (In a Tube of 50)
units
Single - 3 → 5.5 V - - 1 8.44V/V Surface Mount PDIP 8 9.8 x 6.35 x 3.56mm 3.56mm 6.35mm 9.8mm
RS Stock No. 830-4971
Mfr. Part No.ACPL-7900-300E
BrandBroadcom
MYR21.92
Each (In a Pack of 2)
units
Single - 3 → 5.5 V - - 1 8.44V/V Surface Mount PDIP 8 9.8 x 6.35 x 3.56mm 3.56mm 6.35mm 9.8mm
RS Stock No. 300-8243
Mfr. Part No.ISO124P
MYR83.49
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. 451-007
Mfr. Part No.HCPL-7800A-000E
BrandBroadcom
MYR46.87
Each
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
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