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. 178-3213
Mfr. Part No.ACPL-C87AT-000E
BrandBroadcom
MYR35.21
Each (In a Tube of 80)
units
Single - 3 → 5.5 V - - 1 1.01V/V Surface Mount SOIC 8 5.85 x 6.807 x 3.18mm 3.18mm 6.807mm 5.85mm
RS Stock No. 146-6124
Mfr. Part No.ACNT-H870-000E
BrandBroadcom
MYR29.78
Each (In a Tube of 80)
units
Single - 4.5 → 5.5 V - - 2 1.01 Surface Mount SO 8 13.6 x 6.24 x 3.6mm 3.6mm 6.24mm 13.6mm
RS Stock No. 145-7087
Mfr. Part No.AD204JY
MYR568.82
Each (In a Tube of 9)
units
- - - 130dB - 1 40dB Through Hole SIP 11 15.9 x 52.8 x 6.3mm 15.9mm 6.3mm 52.8mm
RS Stock No. 830-4984
Mfr. Part No.ACPL-790B-300E
BrandBroadcom
MYR29.04
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. 796-8745
Mfr. Part No.ADUM3190TRQZ
MYR12.80
Each (In a Pack of 7)
units
Single - 3 → 20 V 72dB - 1 80dB Surface Mount QSOP 16 5 x 4.01 x 1.65mm 1.65mm 4.01mm 5mm
RS Stock No. 922-6633
Mfr. Part No.ACPL-C78A-000E
BrandBroadcom
MYR40.25
Each (In a Tube of 80)
units
Single - 5 V 76dB - 1 18.15dB Surface Mount SOIC 8 3.18 x 5.85 x 6.81mm 3.18mm 6.81mm 5.85mm
RS Stock No. 714-0206
Mfr. Part No.ACPL-C79B-000E
BrandBroadcom
MYR33.66
Each
units
Single - 4.5 → 5.5 V - - 2 8.24V/V Surface Mount SSOP 8 5.85 x 6.807 x 3.18mm 3.18mm 6.807mm 5.85mm
RS Stock No. 178-3209
Mfr. Part No.ACPL-C79B-000E
BrandBroadcom
MYR29.37
Each (In a Tube of 80)
units
Single - 4.5 → 5.5 V - - 2 8.24V/V Surface Mount SSOP 8 5.85 x 6.807 x 3.18mm 3.18mm 6.807mm 5.85mm
RS Stock No. 633-391
Mfr. Part No.AD204JY
MYR311.26
Each
units
- - - 130dB - 1 40dB Through Hole SIP 11 15.9 x 52.8 x 6.3mm 15.9mm 6.3mm 52.8mm
RS Stock No. 830-4987
Mfr. Part No.ACPL-C87AT-000E
BrandBroadcom
MYR40.41
Each
units
Single - 3 → 5.5 V - - 1 1.01V/V Surface Mount SOIC 8 5.85 x 6.807 x 3.18mm 3.18mm 6.807mm 5.85mm
RS Stock No. 178-3173
Mfr. Part No.ACPL-782T-300E
BrandBroadcom
MYR41.27
Each (In a Tube of 50)
units
- - - - - - - - - - - - - -
RS Stock No. 922-5652
Mfr. Part No.HCPL-788J-000E
BrandBroadcom
MYR26.83
Each (In a Tube of 45)
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. 922-6765
Mfr. Part No.ACPL-C87A-000E
BrandBroadcom
MYR22.13
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. 178-3131
Mfr. Part No.ACPL-785J-000E
BrandBroadcom
MYR21.80
Each (In a Tube of 45)
units
Single - 4.5 → 5.5 V - - - - Surface Mount SOIC 16 10.312 x 7.493 x 3.505mm 3.505mm 7.493mm 10.31mm
RS Stock No. 145-6786
Mfr. Part No.AD204KN
MYR672.05
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. 145-7696
Mfr. Part No.ADUM3190BRQZ
MYR8.88
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. 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. 197-7179
Mfr. Part No.ISO122P
MYR144.068
Each (In a Tube of 25)
units
Single ±15V - 140dB - - - - PDIP 8 - - - -
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. 922-6762
Mfr. Part No.ACPL-C870-000E
BrandBroadcom
MYR18.41
Each (In a Tube of 80)
units
Single - 4.5 → 5.5 V -78dB - 1 1.03V/V Surface Mount SSOP 8 5.85 x 6.807 x 3.18mm 3.18mm 6.807mm 5.85mm