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. 734-4988
Mfr. Part No.ACPL-7900-000E
BrandBroadcom
MYR33.02
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. 450-903
Mfr. Part No.HCPL-7800A-300E
BrandBroadcom
MYR59.87
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
MYR46.713
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. 922-6731
Mfr. Part No.ACPL-7900-000E
BrandBroadcom
MYR16.584
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. 817-5789
Mfr. Part No.AMC1200SDUB
MYR47.10
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. 121-9702
Mfr. Part No.AMC1200SDUB
MYR25.316
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. 922-5655
Mfr. Part No.HCPL-7800-300E
BrandBroadcom
MYR42.881
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. 825-3164
Mfr. Part No.AMC1200SDUBR
MYR24.41
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. 450-868
Mfr. Part No.HCPL-7800-300E
BrandBroadcom
MYR53.29
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. 921-3000
Mfr. Part No.AMC1200SDUBR
MYR19.13
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. 461-8267
Mfr. Part No.ISO122JP
MYR119.80
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. 127-0272
Mfr. Part No.AD202JN
MYR282.31
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. 818-8357
Mfr. Part No.HCPL-7510-300E
BrandBroadcom
MYR19.865
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. 178-3187
Mfr. Part No.HCPL-7510-300E
BrandBroadcom
MYR35.164
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. 830-4971
Mfr. Part No.ACPL-7900-300E
BrandBroadcom
MYR23.13
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. 106-7013
Mfr. Part No.AD202JN
MYR256.139
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. 922-6510
Mfr. Part No.ACPL-7900-300E
BrandBroadcom
MYR21.932
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. 160-3298
Mfr. Part No.AD215BY
MYR487.80
Each (In a Tube of 8)
units
Dual ±15V - 120dB - 1 - Through Hole SIP 12 63 x 8.3 x 21.4mm 21.4mm 8.3mm 63mm
RS Stock No. 922-5687
Mfr. Part No.HCPL-7800A-000E
BrandBroadcom
MYR46.575
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. 922-6769
Mfr. Part No.ACPL-C87B-000E
BrandBroadcom
MYR25.022
Each (In a Tube of 80)
units
Single - 4.5 → 5.5 V -78dB - 1 1.005V/V Surface Mount SSOP 8 5.85 x 6.807 x 3.18mm 3.18mm 6.807mm 5.85mm
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