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. 912-9787
Mfr. Part No.AD202KY
MYR321.68
Each (In a Tube of 9)
units
Single - 15 V 105dB - 2 1 → 100V/V Through Hole SIP 10 52.8 x 6.6 x 15.9mm 15.9mm 6.6mm 52.8mm
RS Stock No. 818-8369
Mfr. Part No.HCPL-7520-300E
BrandBroadcom
MYR19.275
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. 768-7897
Mfr. Part No.ACPL-C87A-000E
BrandBroadcom
MYR23.69
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
RS Stock No. 178-3179
Mfr. Part No.ACPL-782T-000E
BrandBroadcom
MYR41.10
Each (In a Tube of 50)
units
- - - - - - - Through Hole DIP - - - - -
RS Stock No. 693-5965
Mfr. Part No.ACPL-C784-000E
BrandBroadcom
MYR24.05
Each
units
Single - 5 V 76dB - 1 18.49dB Surface Mount SSOP 8 3.18 x 5.85 x 6.81mm 3.18mm 6.81mm 5.85mm
RS Stock No. 174-3675
Mfr. Part No.HCPL-7800A-500E
BrandBroadcom
MYR37.717
Each (On a Reel of 1000)
units
Single - Maximum of 5.5 V 76dB - 1 8.08V/V Surface Mount DIP 8 9.8 x 6.35 x 3.56mm 3.56mm 6.35mm 9.8mm
RS Stock No. 818-8262
Mfr. Part No.ACPL-782T-000E
BrandBroadcom
MYR47.12
Each
units
- - - - - - - Through Hole - - - - - -
RS Stock No. 146-4417
Mfr. Part No.ACNT-H511-000E
BrandBroadcom
MYR17.12
Each (In a Pack of 2)
units
Single - Maximum of 24 V - - 1 - Surface Mount SO8 8 13.6 x 6.24 x 3.6mm 3.6mm 6.24mm 13.6mm
RS Stock No. 714-0209
Mfr. Part No.ACPL-C79A-000E
BrandBroadcom
MYR26.91
Each
units
Single - 4.5 → 5.5 V - - 2 8.28V/V Surface Mount SSOP 8 5.85 x 6.807 x 3.18mm 3.18mm 6.807mm 5.85mm
RS Stock No. 758-9579
Mfr. Part No.AD204KN
MYR327.08
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. 178-3192
Mfr. Part No.ACPL-790B-300E
BrandBroadcom
MYR25.36
Each (In a Tube of 50)
units
Single - 3 → 5.5 V - - 1 8.24V/V Through Hole PDIP 8 9.8 x 6.35 x 3.56mm 3.56mm 6.35mm 9.8mm
RS Stock No. 786-3158
Mfr. Part No.ADUM4190ARIZ
MYR12.39
Each (In a Pack of 2)
units
Single - 3 → 20 V - - 1 80dB Surface Mount SOIC 16 12.85 x 7.6 x 2.44mm 2.44mm 7.6mm 12.85mm
RS Stock No. 693-5961
Mfr. Part No.ACPL-C780-000E
BrandBroadcom
MYR32.72
Each
units
Single - 5 V 76dB - 1 18.32dB Surface Mount SOIC 8 3.18 x 5.85 x 6.81mm 3.18mm 6.81mm 5.85mm
RS Stock No. 450-862
Mfr. Part No.HCPL-788J-000E
BrandBroadcom
MYR30.80
Each
units
Dual 5V - 140dB - 1 - Surface Mount SOIC 16 3.51 x 10.31 x 7.49mm 3.51mm 7.49mm 10.31mm
RS Stock No. 159-9273
Mfr. Part No.ADUM3190ARQZ
MYR8.22
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. 796-8742
Mfr. Part No.ADUM4190TRIZ
MYR14.36
Each (In a Pack of 5)
units
Single - 3 → 20 V 72dB - 1 80dB Surface Mount SOIC 16 12.85 x 7.6 x 2.44mm 2.44mm 7.6mm 12.85mm
RS Stock No. 159-8059
Mfr. Part No.AD204KY
MYR288.056
Each (In a Tube of 9)
units
- - - 110dB - 2 1 → 100V/V Through Hole SIP 10 52.8 x 6.6 x 15.9mm 15.9mm 6.6mm 52.8mm
RS Stock No. 734-4984
Mfr. Part No.ACPL-790B-000E
BrandBroadcom
MYR28.88
Each
units
Single - 3 → 5.5 V - - 1 8.24V/V Through Hole PDIP 8 9.8 x 6.35 x 3.56mm 3.56mm 6.35mm 9.8mm
RS Stock No. 759-2196
Mfr. Part No.AD202KY
MYR332.42
Each
units
Single - 15 V 105dB - 2 1 → 100V/V Through Hole SIP 10 52.8 x 6.6 x 15.9mm 15.9mm 6.6mm 52.8mm
RS Stock No. 183-1878
Mfr. Part No.AD210BN
MYR544.00
Each
units
Single - 15 V 120dB - 1 100V/V Through Hole PDIP 12 53.3 x 25.4 x 8.91mm 8.91mm 25.4mm 53.3mm
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