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庫存編號 922-6510
製造零件編號ACPL-7900-300E
BrandBroadcom
HK$38.93
毎管:50 個
單位
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庫存編號 922-6719
製造零件編號ACPL-C790-000E
BrandBroadcom
HK$40.242
毎管:80 個
單位
Single - 3 → 5.5 V - - 1 8.44V/V Surface Mount SOIC 8 5.85 x 6.807 x 3.18mm 3.18mm 6.807mm 5.85mm
RS庫存編號 693-5961
製造零件編號ACPL-C780-000E
BrandBroadcom
HK$65.04
單位
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庫存編號 288-777
製造零件編號ISO122U
HK$266.96
單位
Dual ±12 V, ±15 V, ±5 V, ±9 V - - - 1 0dB Surface Mount SOIC 28 2.3 x 17.9 x 7.5mm 2.3mm 7.5mm 17.9mm
RS庫存編號 768-7897
製造零件編號ACPL-C87A-000E
BrandBroadcom
HK$51.70
單位
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庫存編號 922-5652
製造零件編號HCPL-788J-000E
BrandBroadcom
HK$56.13
毎管:45 個
單位
Dual 5V - 140dB - 1 - Surface Mount SOIC 16 3.51 x 10.31 x 7.49mm 3.51mm 7.49mm 10.31mm
RS庫存編號 740-5279
製造零件編號NJM2505AF-TE1
HK$5.776
/個 (每包:5個)
單位
Single - 4.5 → 9 V - - 1 1dB Surface Mount SOT-23 5 2.9 x 1.6 x 1.1mm 1.1mm 1.6mm 2.9mm
RS庫存編號 121-9702
製造零件編號AMC1200SDUB
HK$41.602
毎管:50 個
單位
Dual 5V - - - 1 8 Surface Mount SOP 8 9.55 x 6.67 x 3.35mm 3.35mm 6.67mm 9.55mm
RS庫存編號 159-9274
製造零件編號ADUM4190ARIZ
HK$23.711
毎管:37 個
單位
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庫存編號 451-007
製造零件編號HCPL-7800A-000E
BrandBroadcom
HK$101.09
單位
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庫存編號 300-8259
製造零件編號ISO124U
HK$187.55
單位
Dual ±12 V, ±15 V, ±5 V, ±9 V - - - 1 0dB Surface Mount SOP 8 2.3 x 17.9 x 7.5mm 2.3mm 7.5mm 17.9mm
RS庫存編號 714-0209
製造零件編號ACPL-C79A-000E
BrandBroadcom
HK$50.99
單位
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庫存編號 121-9701
製造零件編號AMC1100DUB
HK$38.694
毎管:50 個
單位
Dual 5V - 108dB - 1 - Surface Mount SOP 8 9.55 x 6.67 x 3.35mm 3.35mm 6.67mm 9.55mm
RS庫存編號 178-3216
製造零件編號ACNT-H79A-000E
BrandBroadcom
HK$82.49
毎管:80 個
單位
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