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 121-8271
製造零件編號ISO122U
TWD951.90
毎管:20 個
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 145-7696
製造零件編號ADUM3190BRQZ
TWD69.60
毎管:98 個
單位
Single - 3 → 20 V - - 2 80dB Surface Mount QSOP 16 5 x 4.01 x 1.65mm 1.65mm 4.01mm 5mm
RS庫存編號 923-6740
製造零件編號ISO122JUE4
TWD779.70
毎管:20 個
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 817-5789
製造零件編號AMC1200SDUB
TWD193.00
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 106-7018
製造零件編號AD202JY
TWD1,882.40
毎管:9 個
單位
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庫存編號 178-3172
製造零件編號ACPL-790B-000E
BrandBroadcom
TWD185.60
毎管:50 個
單位
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庫存編號 825-3164
製造零件編號AMC1200SDUBR
TWD181.50
/個 (每包:2個)
單位
Single - 5 V 108dB - 1 8dB Surface Mount SOP 8 9.55 x 6.67 x 3.35mm 3.35mm 6.67mm 9.55mm
RS庫存編號 758-9579
製造零件編號AD204KN
TWD1,776.00
單位
- - - 110dB - 2 1 → 100V/V Through Hole PDIP 10 53.3 x 17.8 x 8.52mm 8.52mm 17.8mm 53.3mm
RS庫存編號 174-4179
製造零件編號HCPL-7800A-500E
BrandBroadcom
TWD383.00
單位
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庫存編號 818-8357
製造零件編號HCPL-7510-300E
BrandBroadcom
TWD181.50
/個 (每包:2個)
單位
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庫存編號 178-3192
製造零件編號ACPL-790B-300E
BrandBroadcom
TWD194.40
毎管:50 個
單位
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庫存編號 830-4981
製造零件編號ACPL-C87BT-000E
BrandBroadcom
TWD373.00
單位
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庫存編號 145-7698
製造零件編號ADUM4190SRIZ
TWD81.40
毎管:37 個
單位
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庫存編號 145-7087
製造零件編號AD204JY
TWD1,737.30
毎管:9 個
單位
- - - 130dB - 1 40dB Through Hole SIP 11 15.9 x 52.8 x 6.3mm 15.9mm 6.3mm 52.8mm
RS庫存編號 803-0747
製造零件編號ACPL-782T-300E
BrandBroadcom
TWD392.00
單位
- - - - - - - Surface Mount DIP - - - - -
RS庫存編號 174-3675
製造零件編號HCPL-7800A-500E
BrandBroadcom
TWD221.60
個 (在毎卷:1000)
單位
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庫存編號 734-4966
製造零件編號ACPL-785J-000E
BrandBroadcom
TWD207.00
單位
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庫存編號 922-6762
製造零件編號ACPL-C870-000E
BrandBroadcom
TWD116.80
毎管:80 個
單位
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
RS庫存編號 922-6719
製造零件編號ACPL-C790-000E
BrandBroadcom
TWD123.40
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 922-5652
製造零件編號HCPL-788J-000E
BrandBroadcom
TWD217.60
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