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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Part Details Brand Power Supply Type Typical Dual Supply Voltage Typical Single Supply Voltage Isolation Mode Rejection Number of Channels per Chip Maximum Voltage Gain Mounting Type Package Type Pin Count Dimensions Height Width Length Maximum Operating Temperature Minimum Operating Temperature
AD210BN Analog Devices, Isolation Amplifier, 15 V, 12-Pin PDIP Analog Devices Single - 15 V 120dB 1 100V/V Through Hole PDIP 12 53.3 x 25.4 x 8.91mm 8.91mm 25.4mm 53.3mm +85 °C -40 °C
ACNT-H790-000E Broadcom, Isolation Amplifier, 3 → 5.5 (VDD2) V, 4.5 → 5.5 (VDD1) V, 8-Pin SOIC Broadcom 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 +105 °C -40 °C
ACNT-H79A-000E Broadcom, Isolation Amplifier, 3 → 5.5 (VDD2) V, 4.5 → 5.5 (VDD1) V, 8-Pin SOIC Broadcom 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 +105 °C -40 °C
ACPL-782T-000E Broadcom, Isolation Amplifier DIP Broadcom - - - - - - Through Hole DIP - - - - - - -
ACPL-785J-000E Broadcom, Isolation Amplifier, 4.5 → 5.5 V, 16-Pin SOIC Broadcom Single - 4.5 → 5.5 V - - - Surface Mount SOIC 16 10.312 x 7.493 x 3.505mm 3.505mm 7.493mm 10.31mm +85 °C -40 °C
ACPL-790A-000E Broadcom, Isolation Amplifier, 3 → 5.5 V, 8-Pin PDIP Broadcom 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 +105 °C -40 °C
ACPL-790B-000E Broadcom, Isolation Amplifier, 3 → 5.5 V, 8-Pin PDIP Broadcom 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 +105 °C -40 °C
ACPL-790B-300E Broadcom, Isolation Amplifier, 3 → 5.5 V, 8-Pin PDIP Broadcom 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 +105 °C -40 °C
ACPL-798J-000E Broadcom, Sigma-Delta Modulator, 3 → 5.5 (VDD2) V, 4.5 → 5.5 (VDD1) V, 16-Pin SOIC Broadcom 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 +105 °C -40 °C
ACPL-C784-000E Broadcom, Isolation Amplifier, 5 V, 8-Pin SSOP Broadcom 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 +85 °C -40 °C
ACPL-C78A-060E Broadcom, 2-Channel Isolation Amplifier, 4.5 → 5.5 V, 8-Pin SSOP Broadcom 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 +85 °C -40 °C
ACPL-C79A-000E Broadcom, 2-Channel Isolation Amplifier, 4.5 → 5.5 V, 8-Pin SSOP Broadcom 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 +105 °C -40 °C
ACPL-C79B-000E Broadcom, 2-Channel Isolation Amplifier, 4.5 → 5.5 V, 8-Pin SSOP Broadcom 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 +105 °C -40 °C
ACPL-C87AT-000E Broadcom, Isolation Amplifier, 3 → 5.5 V, 8-Pin SOIC Broadcom 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 +125 °C -40 °C
AD210BN Analog Devices, Isolation Amplifier, 15 V, 12-Pin PDIP Analog Devices Single - 15 V 120dB 1 100V/V Through Hole PDIP 12 53.3 x 25.4 x 8.91mm 8.91mm 25.4mm 53.3mm +85 °C -40 °C
Automotive Isolation Amplifier, DIP8GW Broadcom - - - - - - - - - - - - - - -
HCPL-7510-300E Broadcom, Isolation Amplifier, 4.5 → 5.5 V, 8-Pin PDIP Broadcom 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 +85 °C -40 °C
ACNT-H511-000E Broadcom, Isolation Amplifier, Maximum of 24 V, 8-Pin SO8 Broadcom Single - Maximum of 24 V - 1 - Surface Mount SO8 8 13.6 x 6.24 x 3.6mm 3.6mm 6.24mm 13.6mm +105 °C -40 °C
ACNT-H870-000E Broadcom, 2-Channel Isolation Amplifier, 4.5 → 5.5 V, 8-Pin SO Broadcom Single - 4.5 → 5.5 V - 2 1.01 Surface Mount SO 8 13.6 x 6.24 x 3.6mm 3.6mm 6.24mm 13.6mm +110 °C -40 °C
HCPL-7840-300E Broadcom, Isolation Amplifier, 5 V, 8-Pin PDIP SMD Broadcom Single - 5 V 76.1dB 1 18.49dB Surface Mount PDIP SMD 8 3.56 x 9.8 x 6.35mm 3.56mm 6.35mm 9.8mm +85 °C -40 °C
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