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. 178-3139
Mfr. Part No.ACPL-798J-000E
BrandBroadcom
MYR22.66
Each (In a Tube of 45)
units
Single - 3 → 5.5 (VDD2) V, 4.5 → 5.5 (VDD1) V - - - - Surface Mount SOIC 16 10.31 x 7.49 x 3.5mm 3.5mm 7.49mm 10.31mm
RS Stock No. 796-8745
Mfr. Part No.ADUM3190TRQZ
MYR9.983
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. 178-3206
Mfr. Part No.ACPL-C784-000E
BrandBroadcom
MYR20.98
Each (In a Tube of 80)
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. 178-5472
Mfr. Part No.ISO120G
MYR1,771.989
Each (In a Tube of 9)
units
Dual ±12 V, ±15 V, ±5 V, ±9 V - - - 1 0dB Through Hole SBCDIP 16 2.86 x 30.48 x 7.37mm 2.86mm 7.37mm 30.48mm
RS Stock No. 786-3154
Mfr. Part No.ADUM3190BRQZ
MYR11.57
Each (In a Pack of 2)
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. 369-5774
Mfr. Part No.AD202JY
MYR273.509
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. 178-3215
Mfr. Part No.ACNT-H790-000E
BrandBroadcom
MYR31.45
Each (In a Tube of 80)
units
Single - 3 → 5.5 (VDD2) V, 4.5 → 5.5 (VDD1) V - - - 8.42V/V Surface Mount SOIC 8 13.6 x 6.24 x 3.4mm 3.4mm 6.24mm 13.6mm
RS Stock No. 174-4179
Mfr. Part No.HCPL-7800A-500E
BrandBroadcom
MYR46.19
Each
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. 693-5974
Mfr. Part No.ACPL-C78A-000E
BrandBroadcom
MYR35.77
Each
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. 106-7017
Mfr. Part No.AD215AY
MYR429.51
Each (In a Tube of 8)
units
Dual ±15V - - - 1 20dB Through Hole SIP 12 21.4 x 63 x 8.3mm 21.4mm 8.3mm 63mm
RS Stock No. 786-3167
Mfr. Part No.ADUM4190BRIZ
MYR13.31
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. 106-7018
Mfr. Part No.AD202JY
MYR309.57
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. 263-481
Mfr. Part No.ISO120G
MYR925.85
Each
units
Dual ±12 V, ±15 V, ±5 V, ±9 V - - - 1 0dB Through Hole SBCDIP 16 2.86 x 30.48 x 7.37mm 2.86mm 7.37mm 30.48mm
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. 786-3151
Mfr. Part No.ADUM3190ARQZ
MYR10.735
Each (In a Pack of 2)
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. 910-8226
Mfr. Part No.ACNT-H790-000E
BrandBroadcom
MYR36.07
Each
units
Single - 3 → 5.5 (VDD2) V, 4.5 → 5.5 (VDD1) V - - - 8.42V/V Surface Mount SOIC 8 13.6 x 6.24 x 3.4mm 3.4mm 6.24mm 13.6mm
RS Stock No. 922-6633
Mfr. Part No.ACPL-C78A-000E
BrandBroadcom
MYR31.932
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. 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. 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. 178-3173
Mfr. Part No.ACPL-782T-300E
BrandBroadcom
MYR41.27
Each (In a Tube of 50)
units
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