Analog Devices Inc. ADG465BRM-REEL7

Overview

ADG465BRM-REEL7 from Analog Devices is a single-channel analog channel protector IC designed for bidirectional signal path protection in precision measurement and hot-insertion systems. It delivers ±40 V fault tolerance with power off, 80 Ω typical on-resistance at ±15 V supplies, ±1 nA max leakage at 25°C, and clamps output to VDD − 1.5 V or VSS + 1.5 V during overvoltage events - enabling robust ADC input channel protection without supply sequencing dependency.

For engineers reviewing the ADG465BRM-REEL7 datasheet, ADG465BRM-REEL7 pinout, ADG465BRM-REEL7 application, or ADG465BRM-REEL7 equivalent, this device serves as a high-reliability, latch-up-proof solution for protecting sensitive analog inputs against transients, power-loss conditions, and incorrect supply ramping in ATE, rack-mounted instrumentation, and industrial data acquisition systems.

Technical Context

The ADG465BRM-REEL7 implements a four-MOSFET trench-isolated architecture: two NMOS and two PMOS devices configured to provide bidirectional fault protection independent of supply presence. Its clamping thresholds are defined by VDD − 1.5 V (positive overvoltage) and VSS + 1.5 V (negative overvoltage), with sub-microampere leakage when supplies are absent.

Unlike diode-based protectors, it maintains high-impedance open-circuit behavior with power off and avoids latch-up via dielectric trench isolation between complementary MOS devices. The device operates from bipolar (±15 V) or unipolar supplies and exhibits RON flatness of 8.5 Ω over ±5 V input range.

Key Specifications

Pinout & Package

ADG465BRM-REEL7 is supplied in an 8-lead MSOP package (RM-8), RoHS-compliant, tape-and-reel format (REEL7). Pin 1 is marked with a dot; pins 1–4 occupy one side, pins 5–8 the opposite, with pin 1 at top-left corner when notch faces up.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog channel protection applications.

Compared with ADG467BRMZ, ADG465BRM-REEL7 provides dedicated single-channel optimization with lower channel-to-channel crosstalk and reduced supply current. Against MAX4505EUK+T, ADG465BRM-REEL7 delivers 11% lower RON, 5× tighter leakage control, and certified latch-up immunity - making it the only choice for mission-critical analog protection where failure modes must be eliminated, not mitigated.

Availability

ADG465BRM-REEL7 is available at Aetrix Electronics and suitable for automated test equipment, precision measurement instruments, and hot-insertion rack systems requiring stable component supply, long-term lifecycle support, and traceable RoHS-compliant sourcing.

Supply support for ADG465BRM-REEL7 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, headquartered in Norwood, MA, with design centers worldwide.

The ADG465BRM-REEL7 belongs to Analog Devices' channel protector product line, engineered specifically to eliminate analog input vulnerability in systems where supply sequencing cannot be controlled - targeting ATE, industrial instrumentation, and modular computing infrastructure.

FAQ

What is the maximum continuous overvoltage the ADG465BRM-REEL7 can withstand with power supplies disconnected?

The ADG465BRM-REEL7 withstands continuous analog input overvoltages from −40 V to +40 V when VDD and VSS are at 0 V. This is confirmed in Table 2 (Absolute Maximum Ratings) of the Rev. C datasheet under "VS, VD, Analog Input Overvoltage with Power Off." During this condition, input leakage remains ≤±0.5 µA typical, preserving downstream circuit integrity without requiring auxiliary clamping components.

Does the ADG465BRM-REEL7 require external decoupling capacitors on its VDD and VSS pins?

Yes - the ADG465BRM-REEL7 requires 0.1 µF ceramic decoupling capacitors placed as close as possible to the VDD (Pin 2) and VSS (Pin 6) pins. Figure 13 in the datasheet shows this configuration, and Figure 10 demonstrates that omitting decoupling degrades ACPSRR by >30 dB above 10 kHz. These capacitors stabilize internal bias nodes during fast transients and ensure consistent clamping response.

Can the ADG465BRM-REEL7 be used with unipolar supplies such as +5 V and GND?

Yes - the ADG465BRM-REEL7 supports unipolar operation with VDD = +5 V and VSS = 0 V (GND). In this configuration, the negative clamping threshold becomes GND + 1.5 V = +1.5 V, and positive clamping occurs at +5 V − 1.5 V = +3.5 V. The device maintains 80 Ω typical RON and ±1 nA leakage, as verified in the Dual Supply specifications table under VDD = +5 V, VSS = 0 V test conditions.

Is the ADG465BRM-REEL7 pin-compatible with the ADG465BRTZ-REEL7?

No - the ADG465BRM-REEL7 (MSOP-8) and ADG465BRTZ-REEL7 (SOT-23-6) have different pin counts, layouts, and terminal assignments. The MSOP-8 uses Pins 2 (VDD), 3 (VS1), 6 (VSS), and 7 (VD1); the SOT-23-6 uses Pins 1 (VD1), 3 (VSS), 4 (VS1), and 6 (VDD). PCB redesign is required to switch between packages; they are functionally identical but not mechanically or electrically interchangeable.

What is the typical on-resistance flatness of the ADG465BRM-REEL7 over its specified signal range?

The ADG465BRM-REEL7 exhibits 8.5 Ω typical RON flatness over the ±5 V input range (−5 V ≤ VS ≤ +5 V), as specified in Table 1 under "RON Flatness" at 25°C. This tight flatness ensures minimal THD and gain variation across the signal band - critical for audio, sensor, and metrology applications where linearity directly impacts measurement fidelity.