Analog Devices Inc. ADG467BRZ

Overview

ADG467BRZ from Analog Devices is an octal channel protector IC designed for fault-tolerant analog signal path protection in industrial and test equipment. It provides ±40 V overvoltage withstand capability, 62 Ω typical on-resistance with ±15 V supplies, and open-circuit behavior when power is off-enabling safe hot insertion in rack systems.

For engineers reviewing the ADG467BRZ datasheet, ADG467BRZ pinout, ADG467BRZ application, or ADG467BRZ equivalent, key selection criteria include fault-clamp voltage thresholds (VDD − 1.5 V / VSS + 1.5 V), sub-μA supply current, trench-isolated latch-up immunity, and SOIC-18 package compatibility with ATE input stage protection layouts.

Technical Context

The ADG467BRZ implements eight independent channel protectors, each consisting of two N-channel and two P-channel MOSFETs in series with trench isolation to prevent latch-up. Its operation relies on threshold-based clamping: during overvoltage, NMOS or PMOS devices saturate to clamp output at VDD − 1.5 V or VSS + 1.5 V (typical).

With power applied, it behaves as a low-R_ON series resistor (62 Ω typ); with VDD = VSS = 0 V, all transistors turn off, limiting leakage to ±0.5 nA typ. It supports dual-supply (±4.5 V to ±20 V) and single-supply operation, and maintains ≤5 Ω R_ON match across channels at ±10 V.

Key Specifications

Pinout & Package

ADG467BRZ is packaged in an 18-lead SOIC_W (RW-18) with 0.30 mm lead thickness and 1.27 mm pitch, compliant with JEDEC MS-013-AB. Pin 1 is VD1; pins 9 and 18 are VSS and VDD respectively; pins 10–17 are VS1–VS8; no NC pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG467BRZ, ADG469BRZ offers modularity at the expense of channel density and routing efficiency, while MAX4677ESE+ trades trench-isolated robustness for lower unit cost-making ADG467BRZ the optimal choice for mission-critical industrial ATE and measurement hardware where field failure is unacceptable.

Availability

ADG467BRZ is available at Aetrix Electronics and suitable for automated test equipment, sensitive measurement instrumentation, and hot-insertion rack systems requiring stable component supply across extended production lifecycles.

Supply support for ADG467BRZ 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, headquartered in Norwood, MA, with design centers worldwide.

The ADG467BRZ belongs to Analog Devices' precision protection IC product line, engineered specifically for fault-tolerant analog signal conditioning in environments where power sequencing cannot be guaranteed-such as semiconductor ATE, medical diagnostics, and industrial control systems.

FAQ

What is the maximum continuous overvoltage the ADG467BRZ can withstand with power disconnected?

The ADG467BRZ can withstand continuous analog input voltages from −40 V to +40 V when VDD and VSS are both at 0 V. This is explicitly specified in the Absolute Maximum Ratings table and verified under fault conditions with power off. The device achieves this via intrinsic MOSFET cutoff behavior, limiting input leakage to ±0.5 nA typical-making ADG467BRZ uniquely suited for hot-swap applications where supply sequencing is uncontrolled.

Does the ADG467BRZ require external components to function as a channel protector?

No, the ADG467BRZ operates as a fully self-contained channel protector with no external components required for basic overvoltage or power-off protection. Its trench-isolated MOSFET structure provides inherent clamping at VDD − 1.5 V and VSS + 1.5 V (typical) and open-circuit isolation when unpowered. External bypass capacitors (0.1 µF) on VDD/VSS are recommended per the datasheet for noise suppression but are not functionally mandatory for protection operation.

How does the ADG467BRZ compare to standard analog switches in overvoltage protection capability?

Unlike standard analog switches-which fail catastrophically or leak excessively under overvoltage-the ADG467BRZ is purpose-built to survive and clamp. Standard switches lack the four-MOSFET series architecture and trench isolation; they typically exhibit destructive latch-up or >1 mA fault current above absolute max ratings. The ADG467BRZ sustains ±40 V with sub-nanoampere leakage and defined clamp voltages, making it a true fault-protected component rather than a signal-routing switch.

Is the ADG467BRZ compatible with single-supply operation?

Yes, the ADG467BRZ supports single-supply operation with VSS tied to ground and VDD ranging from +4.5 V to +20 V. In this configuration, the lower clamp threshold becomes 0 V + 1.5 V = +1.5 V, and the upper clamp remains VDD − 1.5 V. Performance metrics-including 62 Ω R_ON and ±1 nA leakage-are validated across this range, enabling use in +5 V or +12 V systems without redesign.

What is the thermal performance of the ADG467BRZ in its SOIC-18 package?

In the 18-lead SOIC_W (RW-18) package, the ADG467BRZ has a junction-to-ambient thermal impedance (θ_JA) of 160°C/W. Given its typical power dissipation of only 0.8 μW, self-heating is negligible (<0.13°C rise at ambient)-so no heatsinking or airflow is required. This ultra-low thermal impact enables dense placement in multichannel ATE modules without thermal crosstalk concerns.