ADUM3195ARWZ-RL7 - Isolated Amplifier | Analog Devices
MPN: ADUM3195ARWZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.6 | $360.00 |
| 500 | $3.24 | $1,620.00 |
| 1,000 | $2.88 | $2,880.00 |
ADUM3195ARWZ-RL7 Overview
An isolation amplifier is a type of amplifier that provides electrical isolation between its input and output stages, typically using capacitive or magnetic coupling. This isolation protects sensitive control circuitry from high voltages, ground loops, and noise, while maintaining signal integrity. In the hierarchy of signal conditioning, an isolation amplifier falls under analog front-end components, which are essential in industrial and automotive applications where safety and reliability are paramount.
Key features of the ADuM3195 include a wide input common-mode voltage range, high common-mode transient immunity, and low power consumption. The device operates over a wide temperature range, making it suitable for harsh environments. Its adjustable gain allows designers to optimize the output swing for specific ADC inputs, reducing the need for external scaling components.
Technically, the ADuM3195 uses iCoupler technology, which employs chip-scale transformers to transmit signals across the isolation barrier. This approach offers advantages over optocouplers, such as higher speed, better reliability, and no LED degradation over time. The device also includes an internal reference and output amplifier, simplifying the external circuit design.
Typical applications include isolated voltage sensing in switch-mode power supplies, motor control, and battery monitoring systems. The ADuM3195 is also used in isolated data acquisition systems where ground loop isolation is critical. Its low offset and gain error ensure accurate measurement, which is essential for closed-loop control.
When designing with the ADuM3195, it is important to provide proper power supply decoupling and to follow the recommended layout guidelines to maintain isolation performance. The device requires a separate ground plane for the input and output sides to achieve the specified common-mode transient immunity.
Drop-in alternatives for ADUM3195ARWZ-RL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM3195BRQZ
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ADUM3195WBRQZ-RL7
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ADUM3195WBRQZ
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ADUM3195ARWZ-RL7 Maximum Ratings & Electrical Characteristics
| Type | Isolation Amplifier |
| Number of Circuits | 1 |
| Output Type | Single-Ended |
| Gain | Adjustable |
| Package | 16-SOIC-W |
| Mounting Type | Surface Mount |
| Technology | iCoupler |
| RoHS Status | Compliant |
ADUM3195ARWZ-RL7 Pin Configuration
| Pin 1 | VDD1 — Input side supply |
| Pin 2 | GND1 — Input side ground |
| Pin 3 | VIN+ — Non-inverting input |
| Pin 4 | VIN- — Inverting input |
| Pin 5 | GAIN — Gain setting pin |
| Pin 6 | REF — Reference voltage |
| Pin 7 | VOUT — Output voltage |
| Pin 8 | GND2 — Output side ground |
| Pin 9 | VDD2 — Output side supply |
| Pin 10 | NC — No connect |
| Pin 11 | NC — No connect |
| Pin 12 | NC — No connect |
| Pin 13 | NC — No connect |
| Pin 14 | NC — No connect |
| Pin 15 | NC — No connect |
| Pin 16 | NC — No connect |
Typical Applications
ADUM3195ARWZ-RL7 is suitable for 6 applications: Isolated Voltage Sensing in Power Supplies, Motor Drive Feedback, Battery Monitoring Systems, Isolated Data Acquisition, Industrial Process Control, Renewable Energy Systems.
Isolated Voltage Sensing in Power Supplies
The ADUM3195ARWZ-RL7 is used to sense output voltage in isolated power supplies, providing feedback to the primary-side controller. Its low offset and gain error ensure accurate regulation. The adjustable gain allows scaling the sensed voltage to match the ADC input range. The iCoupler technology provides reliable isolation, eliminating the need for optocouplers and improving transient response.
Recommended
Motor Drive Feedback
In motor drives, the ADUM3195ARWZ-RL7 isolates the DC bus voltage sensing from the control circuitry. This prevents high-voltage transients from damaging the controller. The device's high common-mode transient immunity ensures stable operation in noisy environments. Its small package and low power consumption make it suitable for compact drive designs.
Recommended
Battery Monitoring Systems
The ADUM3195ARWZ-RL7 is used to monitor individual cell voltages in battery packs, providing isolated measurements to the battery management system. Its low offset voltage ensures accurate voltage readings, which is critical for balancing and safety. The adjustable gain allows optimization for different cell voltage ranges. The isolation protects the monitoring circuitry from high stack voltages.
Recommended
Isolated Data Acquisition
In data acquisition systems, the ADUM3195ARWZ-RL7 provides galvanic isolation between sensors and the ADC, preventing ground loops and reducing noise. Its single-ended output simplifies interfacing with ADCs. The device's low gain error ensures measurement accuracy. It is ideal for industrial monitoring systems where sensors are located in harsh environments.
Recommended
Industrial Process Control
The ADUM3195ARWZ-RL7 is used in process control systems to isolate analog signals from field transmitters. This protects the control system from voltage spikes and noise. The adjustable gain allows matching the signal range to the PLC input. Its wide operating temperature range makes it suitable for industrial environments.
Recommended
Renewable Energy Systems
In solar inverters and wind turbines, the ADUM3195ARWZ-RL7 isolates voltage sensing from the high-voltage DC bus. This ensures safe and accurate monitoring for maximum power point tracking. The device's high isolation voltage and transient immunity are essential for reliability. Its low power consumption is beneficial for energy-efficient designs.
Recommended
Recommended Products Summary
Engineering reference data for ADUM3195ARWZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM3195BRQZ | ADUM3195WBRQZ-RL7 | ADUM3195WBRQZ |
|---|---|---|---|---|
| Package | 16-SOIC-W | 16-QSOP | 16-QSOP | 16-QSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Gain | Adjustable | Adjustable | Adjustable | Adjustable |
| Output Type | Single-Ended | Single-Ended | Single-Ended | Single-Ended |
| Automotive Grade | No | No | Yes | Yes |
Key Differentiators
- iCoupler technology vs optocoupler (vs Optocoupler-based isolation amplifiers)
- Low offset and gain error (vs ADUM3195BRQZ)
- Adjustable gain (vs Fixed-gain isolation amplifiers)
Design Notes
For optimal isolation performance, maintain a clean separation between the input and output ground planes. Use a slot or cutout under the device to increase creepage distance. Place decoupling capacitors close to the VDD1 and VDD2 pins, typically 0.1uF and 10uF. Follow the layout guidelines in the datasheet to achieve the specified common-mode transient immunity.
Ensure that the supply voltages for the input and output sides are within the recommended operating range. Use low-ESR capacitors for decoupling to minimize noise. The device's power consumption is low, but proper bypassing is essential for stable operation. Refer to the datasheet for the recommended supply voltage and current requirements.
Do not exceed the absolute maximum ratings for supply voltage or input voltage. The gain setting pin must be connected correctly to achieve the desired gain. Avoid floating unused pins; connect them to ground or leave as per datasheet. Ensure that the isolation barrier is not compromised by PCB traces or vias that cross the isolation boundary.
Compliance Information
RoHS compliant per Analog Devices. Not AEC-Q100 qualified; automotive grade available as ADUM3195WBRQZ-RL7.
