Analog Devices Inc. ADG465BRTZ-REEL7

Overview

ADG465BRTZ-REEL7 from Analog Devices is a single-channel analog channel protector in SOT-23-6 package, designed for bidirectional signal path protection in precision analog front-ends. It provides ±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 - used in ADC input channel protection where supply sequencing is unreliable.

For engineers reviewing the ADG465BRTZ-REEL7 datasheet, ADG465BRTZ-REEL7 pinout, ADG465BRTZ-REEL7 application, or ADG465BRTZ-REEL7 equivalent, this page delivers verified specifications, validated SOT-23-6 pin mapping, real-world use cases in hot-insertion systems and measurement equipment, and two confirmed alternative parts with documented functional and packaging differences.

Technical Context

The ADG465BRTZ-REEL7 implements a four-MOSFET trench-isolated architecture: two NMOS and two PMOS devices arranged to enable bidirectional conduction while ensuring latch-up immunity. Its operation relies on threshold-based clamping - positive overvoltage triggers NMOS saturation at VDD − 1.5 V, negative overvoltage triggers PMOS saturation at VSS + 1.5 V.

Unlike diode-based protectors, it remains high-impedance with zero supply voltage (VDD = VSS = 0 V), limiting input leakage to ±0.005 µA typical. It supports dual-supply operation from ±5 V to ±20 V, and its RON flatness of 8.5 Ω (−5 V to +5 V range) ensures minimal signal distortion in precision DC-coupled paths.

Key Specifications

Pinout & Package

ADG465BRTZ-REEL7 is housed in a RoHS-compliant 6-lead SOT-23 package (JEDEC MO-178-AB, package option RJ-6), with 1.9 mm lead pitch and thermal resistance θJA = 230°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG465BRMZ and ADG467BRZ, the ADG465BRTZ-REEL7 offers the smallest PCB footprint and lowest assembly cost for single-channel protection, while maintaining identical electrical performance and fault resilience - making it optimal for high-density, low-pin-count analog I/O modules.

Availability

ADG465BRTZ-REEL7 is available at Aetrix Electronics and suitable for ADC input protection, hot-insertion rack systems, and sensitive measurement equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for ADG465BRTZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and healthcare markets since 1965.

The ADG465 product line delivers robust analog channel protection using trench-isolated MOSFET architectures - specifically engineered for applications demanding guaranteed fault resilience without supply sequencing control.

FAQ

What is the maximum continuous overvoltage the ADG465BRTZ-REEL7 can withstand with power supplies disconnected?

The ADG465BRTZ-REEL7 withstands continuous analog input overvoltage from −40 V to +40 V when VDD and VSS are both at 0 V. This is explicitly specified in Table 2 (Absolute Maximum Ratings) of the Rev. C datasheet and validated by its trench-isolated architecture, which holds all MOSFETs fully off and limits leakage to ±0.005 µA typical. This capability makes ADG465BRTZ-REEL7 uniquely suited for hot-plug scenarios where supply rails may be absent during connector engagement.

Does the ADG465BRTZ-REEL7 require external clamping diodes or TVS devices for reliable protection?

No - the ADG465BRTZ-REEL7 provides intrinsic clamping to VDD − 1.5 V and VSS + 1.5 V during overvoltage events with power applied, and open-circuit isolation with power off. However, for surge events exceeding ±40 V (e.g., lightning-induced transients), Analog Devices recommends pairing ADG465BRTZ-REEL7 with a TVS device upstream, as described in Figure 21 of the datasheet, to handle energy beyond the channel protector's dissipation limit.

Can the ADG465BRTZ-REEL7 be used with unipolar supplies such as +5 V and GND?

Yes - the ADG465BRTZ-REEL7 supports unipolar operation with VDD = +5 V and VSS = GND (0 V). In this configuration, the negative clamping threshold becomes GND + 1.5 V = +1.5 V, and the positive clamping threshold is +5 V − 1.5 V = +3.5 V. The device maintains 80 Ω typical RON and ±1 nA leakage, as confirmed in the Dual Supply specifications table under "VDD = +5 V, VSS = 0 V" test conditions.

What is the thermal resistance (θJA) of the ADG465BRTZ-REEL7 in its SOT-23-6 package?

The ADG465BRTZ-REEL7 has a junction-to-ambient thermal resistance (θJA) of 230°C/W when mounted on a JEDEC 1S 2-layer test board, per Table 3 in the Rev. C datasheet. This value assumes standard surface-mount soldering and no added copper pour; actual θJA improves with thermal vias and PCB copper area. The SOT-23-6 package's compact size inherently limits heat dissipation, reinforcing the device's ultra-low power design (0.8 µW typical).

Is the ADG465BRTZ-REEL7 pin-compatible with other Analog Devices channel protectors like the ADG467?

No - the ADG465BRTZ-REEL7 (SOT-23-6) is not pin-compatible with the ADG467 (SOIC-16) or ADG465BRMZ (MSOP-8). Pin 1 (VD1) and Pin 4 (VS1) are signal terminals in the SOT-23 variant, while the MSOP places VD1 on Pin 7 and VS1 on Pin 3, and the SOIC uses entirely different pin numbering and spacing. Direct PCB replacement requires layout revision; only functional equivalence is guaranteed.