Analog Devices Inc. ADG465BRMZ-REEL7

Overview

ADG465BRMZ-REEL7 from Analog Devices is a single-channel analog channel protector IC designed for bidirectional signal path protection in precision measurement and hot-swap 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.

For engineers reviewing the ADG465BRMZ-REEL7 datasheet, ADG465BRMZ-REEL7 pinout, ADG465BRMZ-REEL7 application, or ADG465BRMZ-REEL7 equivalent, key selection criteria include fault-protected analog range (VSS + 1.5 V to VDD − 1.5 V), trench-isolated latch-up immunity, nanoamp-level leakage with power off, and compatibility with bipolar/unipolar supplies up to ±20 V.

Technical Context

The ADG465BRMZ-REEL7 implements a four-MOSFET channel protector architecture: two NMOS and two PMOS devices with trench isolation. During normal operation (VSS + 1.5 V < VIN < VDD − 1.5 V), it behaves as a low-RON series resistor; outside that range, one MOSFET saturates to clamp output voltage while limiting current.

Clamping thresholds are defined by supply rails: positive overvoltage triggers at VDD − 1.5 V, negative at VSS + 1.5 V. With VDD = VSS = 0 V, all transistors are fully off, yielding ≤±0.015 µA input leakage and open-circuit signal path isolation-critical for hot-insertion rack systems where power sequencing is uncontrolled.

Key Specifications

Pinout & Package

ADG465BRMZ-REEL7 is supplied in an 8-lead MSOP package (RM-8), with exposed pad not internally connected. Pin 1 is marked by a dot or notch; pins 1–4 occupy one side, pins 5–8 the opposite. NIC (Not Internally Connected) pins must remain unconnected per datasheet directive.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG465BRMZ-REEL7, ADG467BRMZ offers channel count scalability without sacrificing protection specs, while MAX4505EUA+ trades fault robustness and power-off safety for lower unit cost in non-critical voltage domains.

Availability

ADG465BRMZ-REEL7 is available at Aetrix Electronics and suitable for ATE equipment, sensitive measurement instrumentation, and hot insertion rack systems requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for ADG465BRMZ-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 ADG465BRMZ-REEL7 belongs to Analog Devices' precision analog protection product line, engineered specifically for fault-tolerant signal path integrity in automated test, industrial measurement, and mission-critical hot-swap infrastructure.

FAQ

What is the maximum continuous overvoltage the ADG465BRMZ-REEL7 can withstand with power supplies disconnected?

The ADG465BRMZ-REEL7 withstands continuous analog input overvoltages from −40 V to +40 V when VDD and VSS are at 0 V. This is specified in Table 2 (Absolute Maximum Ratings) of the Rev. C datasheet and enabled by its fully off-state MOSFET configuration. No external clamping components are needed to achieve this rating, making ADG465BRMZ-REEL7 uniquely suited for uncontrolled power sequencing scenarios.

Does the ADG465BRMZ-REEL7 require external decoupling capacitors on VDD and VSS for stable operation?

Yes-external 0.1 µF ceramic capacitors placed close to the VDD and VSS pins are required for optimal ACPSRR performance and transient response, as shown in Figure 13 and confirmed in the Test Circuits section. Without them, ACPSRR degrades significantly above 10 kHz (see Figure 10), and overvoltage clamping speed may suffer. The ADG465BRMZ-REEL7 itself draws only ±0.5 µA quiescent current, so capacitor sizing is driven by noise suppression-not power delivery.

Can the ADG465BRMZ-REEL7 be used with unipolar supplies, and what is the minimum functional supply voltage?

Yes-the ADG465BRMZ-REEL7 operates with unipolar supplies (e.g., VDD = +5 V, VSS = 0 V) as well as bipolar (±15 V). The minimum functional supply is defined by the clamping threshold: VDD must exceed VS1 by >1.5 V and VSS must be < VS1 by >1.5 V for normal conduction. Absolute maximum ratings allow VDD to VSS up to 44 V, but typical operation starts reliably at ±5 V (10 V total), with RON increasing slightly below that.

How does the trench isolation in the ADG465BRMZ-REEL7 prevent latch-up, and is it tested per JEDEC JESD78?

Trench isolation replaces junction isolation with dielectric oxide trenches between N- and P-channel MOSFETs, eliminating parasitic SCR formation paths that cause destructive latch-up. This construction is explicitly stated in the Product Highlights and Theory of Operation sections. While the datasheet does not cite JEDEC JESD78 testing, the "latch-up proof" claim is validated by design and verified through accelerated stress testing per Analog Devices' internal qualification standards for industrial-grade products like ADG465BRMZ-REEL7.

What is the signal path directionality of the ADG465BRMZ-REEL7, and how does it affect PCB layout?

The ADG465BRMZ-REEL7 is fully bidirectional: VS1 and VD1 are functionally identical signal terminals with no preferred direction. Layout requires symmetrical trace routing and equal impedance to both pins-no orientation dependency exists. However, VDD and VSS must maintain correct polarity: reversing them disables clamping and risks permanent damage. The MSOP-8 package's pin 2 (VDD) and pin 6 (VSS) positions are fixed per Figure 3, and misrouting violates absolute maximum ratings.