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 197-7179
製造零件編號ISO122P
TWD961.10
毎管:25 個
單位
Single ±15V - 140dB - - - - PDIP 8 - - - -
RS庫存編號 830-4981
製造零件編號ACPL-C87BT-000E
BrandBroadcom
TWD366.00
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 168-9952
製造零件編號SI8261ACA-C-IS
TWD36.40
毎管:96 個
單位
Single - 5 → 30 V - Rail to Rail Output 1 - Surface Mount SOIC 8 5 x 4 x 1.55mm 1.55mm 5mm 5mm
RS庫存編號 145-7698
製造零件編號ADUM4190SRIZ
TWD92.90
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 910-8257
製造零件編號ACPL-798J-000E
BrandBroadcom
TWD204.00
單位
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庫存編號 178-3171
製造零件編號ACPL-790A-000E
BrandBroadcom
TWD188.90
毎管:50 個
單位
Single - 3 → 5.5 V - - 1 8.28V/V Through Hole PDIP 8 9.8 x 6.35 x 3.56mm 3.56mm 6.35mm 9.8mm
RS庫存編號 178-3173
製造零件編號ACPL-782T-300E
BrandBroadcom
TWD352.30
毎管:50 個
單位
- - - - - - - - - - - - - -
RS庫存編號 178-3206
製造零件編號ACPL-C784-000E
BrandBroadcom
TWD179.10
毎管:80 個
單位
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庫存編號 714-0203
製造零件編號ACPL-C78A-060E
BrandBroadcom
TWD395.00
單位
Single - 4.5 → 5.5 V - - 2 8.08V/V Surface Mount SSOP 8 5.85 x 6.807 x 3.18mm 3.18mm 6.807mm 5.85mm
RS庫存編號 923-6740
製造零件編號ISO122JU
TWD807.30
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 145-7696
製造零件編號ADUM3190BRQZ
TWD75.80
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 178-3210
製造零件編號ACPL-C79A-000E
BrandBroadcom
TWD184.80
毎管:80 個
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 178-3209
製造零件編號ACPL-C79B-000E
BrandBroadcom
TWD250.70
毎管:80 個
單位
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庫存編號 922-6513
製造零件編號ACPL-C87BT-000E
BrandBroadcom
TWD311.80
毎管:80 個
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 734-4981
製造零件編號ACPL-790A-000E
BrandBroadcom
TWD205.00
單位
Single - 3 → 5.5 V - - 1 8.28V/V Through Hole PDIP 8 9.8 x 6.35 x 3.56mm 3.56mm 6.35mm 9.8mm
RS庫存編號 231-5196
製造零件編號AD215AY
TWD2,730.00
單位
Dual ±15V - - - 1 20dB Through Hole SIP 12 21.4 x 63 x 8.3mm 21.4mm 8.3mm 63mm
RS庫存編號 818-8357
製造零件編號HCPL-7510-300E
BrandBroadcom
TWD172.50
/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 709-2324
製造零件編號ISO122JU
TWD949.00
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 714-0206
製造零件編號ACPL-C79B-000E
BrandBroadcom
TWD265.00
單位
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庫存編號 786-3151
製造零件編號ADUM3190ARQZ
TWD88.50
/個 (每包:2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