Analog Devices Inc. ADUM3195WBRQZ

Overview

ADUM3195WBRQZ from Analog Devices is an automotive-grade isolated amplifier with adjustable gain and single-ended output, designed for high-accuracy voltage sensing across reinforced isolation barriers. It delivers ±6 mV max output offset voltage at 25°C, ±0.5% max gain error, 210 kHz bandwidth, and operates from −40°C to +125°C ambient - enabling precise DC bus monitoring in on-board chargers and inverters.

For engineers reviewing the ADUM3195WBRQZ datasheet, ADUM3195WBRQZ pinout, ADUM3195WBRQZ application, or ADUM3195WBRQZ equivalent, key selection criteria include its 3000 V_rms reinforced isolation rating (VIORM = 636 V_peak), dual 2.5 V references (VREF1/VREF2), integrated op amp with 10 GΩ input resistance, and AEC-Q100 qualification for automotive power electronics.

Technical Context

The ADUM3195WBRQZ implements iCoupler® technology with a PWM-based modulation scheme: the input-side op amp (VIN+, VIN−, VOUT2) conditions the signal, which is digitized via duty-cycle encoding and transmitted across a coreless transformer; the output side demodulates the ratio against VREF1 to reconstruct a linear analog output (VOUT1). Its architecture eliminates lifetime drift and temperature-dependent CTR degradation inherent in optocouplers.

It integrates two independent, high-accuracy 2.5 V references (±25 ppm/°C tempco), supports unity-gain or inverting configurations, and features 100–150 kV/µs common-mode transient immunity (CMTI) - critical for noisy high-voltage switching environments like motor drives and DC/DC converters where ground potential differences exceed 1.5 kV.

Key Specifications

Pinout & Package

ADUM3195WBRQZ is housed in a 16-lead QSOP (RQ-16) package with 3.2 mm creepage/clearance and reinforced insulation rated for 636 V_peak. Side 1 (pins 1–8) and Side 2 (pins 9–16) are galvanically isolated groups.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar isolated amplifier applications.

Compared with AMC1301QDWVRQ1 and ISO224BDWR, ADUM3195WBRQZ provides a self-contained analog-output solution with integrated references and op amp - reducing component count and layout complexity in automotive voltage sensing, while offering optimal trade-offs between bandwidth, accuracy, and integration for cost-sensitive production.

Availability

ADUM3195WBRQZ is available at Aetrix Electronics and suitable for automotive on-board chargers, industrial inverters, and isolated DC/DC converters requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for ADUM3195WBRQZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and consumer markets.

The ADuM3195 product line delivers isolated amplifiers optimized for high-accuracy voltage sensing in harsh environments - specifically engineered for automotive traction inverters, battery management, and industrial power conversion where reliability, low drift, and reinforced safety isolation are mandatory.

FAQ

What is the isolation rating of ADUM3195WBRQZ and what standards does it meet?

ADUM3195WBRQZ provides 3000 V_rms isolation for 1 minute per UL 1577 and complies with DIN VDE V 0884-11:2017-01 for reinforced insulation (VIORM = 636 V_peak). Pending certifications include UL recognition (File E214100) and CSA approval. The device is marked with * to indicate VDE compliance and undergoes 100% production partial discharge testing at 1192 V_peak.

How does ADUM3195WBRQZ achieve stable gain and offset over temperature?

ADUM3195WBRQZ achieves ±0.5% max gain error and ±6 mV max output offset through matched on-chip resistor networks, laser-trimmed references, and iCoupler® PWM modulation that inherently rejects analog drift. Its gain error drift is limited to ±27 ppm/°C and offset drift to −22 µV/°C, enabling operation from −40°C to +125°C without recalibration - verified per AEC-Q100 Grade 1 test conditions.

Can ADUM3195WBRQZ be used in inverting amplifier configurations?

Yes, ADUM3195WBRQZ supports inverting amplifier topologies using its input-side op amp (VIN+, VIN−, VOUT2). By connecting VREF2 to VIN+ and applying the signal to VIN− via R1/R2 feedback, the device outputs VOUT2 = VREF2 – R2/R1 × (VBUS − VREF2), enabling polarity inversion before isolation. This configuration is documented in Figure 38 of the ADUM3195WBRQZ datasheet.

What are the decoupling requirements for ADUM3195WBRQZ power supplies?

ADUM3195WBRQZ requires local decoupling on both sides: a 0.1 µF ceramic capacitor in parallel with a 1 µF tantalum or ceramic capacitor between VDD1 and GND1, and identically between VDD2 and GND2. These must be placed within 5 mm of their respective pins. For high-CMTI performance, avoid copper pours extending under the package body beyond solder pads.

Is ADUM3195WBRQZ pin-compatible with other ADuM3195 variants?

Yes, ADUM3195WBRQZ is pin-compatible with ADUM3195BRQZ and ADUM3195WBRQZ-RL7 in the same RQ-16 QSOP package. All share identical pinout, electrical specifications, and thermal characteristics. The "W" suffix denotes AEC-Q100 qualification, while "B" indicates standard grade; "-RL7" denotes 7-inch tape-and-reel packaging - mechanical and functional interchangeability is maintained.