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. 178-3192
Mfr. Part No.ACPL-790B-300E
BrandBroadcom
£4.704
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. 830-4971
Mfr. Part No.ACPL-7900-300E
BrandBroadcom
£4.24
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. 796-8745
Mfr. Part No.ADUM3190TRQZ
£2.55
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. 633-391
Mfr. Part No.AD204JY
£56.90
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. 734-4966
Mfr. Part No.ACPL-785J-000E
BrandBroadcom
£2.44
Each
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. 145-7087
Mfr. Part No.AD204JY
£56.181
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. 178-3131
Mfr. Part No.ACPL-785J-000E
BrandBroadcom
£2.396
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. 178-3210
Mfr. Part No.ACPL-C79A-000E
BrandBroadcom
£4.25
Each (In a Tube of 80)
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. 803-0747
Mfr. Part No.ACPL-782T-300E
BrandBroadcom
£9.59
Each
Units
- - - - - - - Surface Mount DIP - - - - -
RS Stock No. 145-7696
Mfr. Part No.ADUM3190BRQZ
£1.88
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. 714-0209
Mfr. Part No.ACPL-C79A-000E
BrandBroadcom
£5.11
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. 178-3173
Mfr. Part No.ACPL-782T-300E
BrandBroadcom
£7.99
Each (In a Tube of 50)
Units
- - - - - - - - - - - - - -
RS Stock No. 786-3154
Mfr. Part No.ADUM3190BRQZ
£2.215
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. 922-6513
Mfr. Part No.ACPL-C87BT-000E
BrandBroadcom
£7.08
Each (In a Tube of 80)
Units
Single - 3 → 5.5 V - - 1 1.005V/V Surface Mount SOIC 8 5.85 x 6.807 x 3.18mm 3.18mm 6.807mm 5.85mm
RS Stock No. 818-8357
Mfr. Part No.HCPL-7510-300E
BrandBroadcom
£4.24
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. 231-5196
Mfr. Part No.AD215AY
£65.93
Each
Units
Dual ±15V - - - 1 20dB Through Hole SIP 12 21.4 x 63 x 8.3mm 21.4mm 8.3mm 63mm
RS Stock No. 786-3158
Mfr. Part No.ADUM4190ARIZ
£2.37
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. 178-3139
Mfr. Part No.ACPL-798J-000E
BrandBroadcom
£4.204
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. 159-9274
Mfr. Part No.ADUM4190ARIZ
£2.007
Each (In a Tube of 37)
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. 910-8229
Mfr. Part No.ACNT-H79A-000E
BrandBroadcom
£8.39
Each
Units
Single - 3 → 5.5 (VDD2) V, 4.5 → 5.5 (VDD1) V - - - 8.26V/V Surface Mount SOIC 8 13.6 x 6.24 x 3.4mm 3.4mm 6.24mm 13.6mm
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The range of isolation amplifier optocouplers from Avago ...
Description:
The range of isolation amplifier optocouplers from Avago Technologies is ideal for industrial environments where the optocoupler is used to insulate high voltages and isolate any unwanted signals. Sigma-delta modulator technology allows the current and voltage sensor families to provide precise measurements of phase current and bus voltage in motor ...