Analog Devices Inc. ADG467BR-REEL7

Overview

ADG467BR-REEL7 from Analog Devices is an octal channel protector IC designed for series placement in analog signal paths to safeguard downstream circuitry against overvoltage transients and power-loss conditions. It features ±40 V fault tolerance, 62 Ω typical on-resistance, ±1 nA max channel leakage at +25°C, and operates from ±4.5 V to ±20 V dual supplies. It is used in hot-insertion rack systems where supply sequencing cannot be guaranteed.

For engineers reviewing the ADG467BR-REEL7 datasheet, ADG467BR-REEL7 pinout, ADG467BR-REEL7 application, or ADG467BR-REEL7 equivalent, key selection criteria include fault-clamp voltage thresholds (VDD − 1.5 V / VSS + 1.5 V), trench-isolated latch-up immunity, power-off open-circuit behavior, and SOIC_W package compatibility with industrial ATE and precision measurement interfaces.

Technical Context

The ADG467BR-REEL7 implements eight independent channel protectors, each composed of two N-channel and two P-channel MOSFETs in series with trench dielectric isolation-eliminating latch-up risk. During normal operation (VSS + 1.5 V < VSx < VDD − 1.5 V), it behaves as a low-RON series resistor; outside this range, output clamping activates via MOSFET saturation.

Under fault conditions-including power-off (VDD = VSS = 0 V)-input leakage remains ≤±2 nA, and fault current is limited to sub-microampere levels. Clamping voltages shift under load: e.g., with 1 kΩ load, VDD = +15 V, positive overvoltage yields VCLAMP ≈ 12.9 V due to I×R drop across internal MOSFET channels.

Key Specifications

Pinout & Package

ADG467BR-REEL7 is packaged in an 18-lead SOIC_W (RW-18) with 0.4 mm lead pitch, compliant to JEDEC MS-013-AB, and rated for −40°C to +85°C industrial operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG467BR-REEL7, ADG467BRZ-REEL7 offers identical performance with RoHS compliance, while ADG469BR-REEL7 provides the same per-channel protection in a hex configuration-enabling optimized channel density without sacrificing fault resilience or leakage performance.

Availability

ADG467BR-REEL7 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 ADG467BR-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.

The ADG467BR-REEL7 belongs to Analog Devices' precision protection IC portfolio, engineered specifically for fault-tolerant analog signal routing in environments with unreliable power sequencing or high transient exposure.

FAQ

What is the maximum continuous overvoltage the ADG467BR-REEL7 can withstand with power supplies disconnected?

The ADG467BR-REEL7 can withstand continuous analog input overvoltages from −40 V to +40 V when VDD and VSS are at 0 V. Under this condition, all internal MOSFETs are fully off, limiting input leakage to ±2 nA maximum and preventing current flow into downstream circuitry-making it ideal for hot-swap applications where power sequencing is uncontrolled. This rating is explicitly specified in the Absolute Maximum Ratings table.

Does the ADG467BR-REEL7 require external components to achieve latch-up immunity?

No, the ADG467BR-REEL7 achieves intrinsic latch-up immunity through trench dielectric isolation between its N- and P-channel MOSFETs-eliminating parasitic SCR formation. Unlike junction-isolated devices, it requires no external current-limiting resistors or supply decoupling beyond standard 0.1 µF bypass capacitors. This architecture is confirmed in the Circuit Information and Trench Isolation sections of the datasheet.

How does the ADG467BR-REEL7 behave when powered by a single +10 V supply instead of dual ±15 V?

When operated from a single +10 V supply (VDD = +10 V, VSS = 0 V), the ADG467BR-REEL7 maintains functional channel protection with adjusted clamp thresholds: output clamps at approximately +8.5 V for positive overvoltage and +0 V for negative overvoltage. On-resistance increases slightly to ~75 Ω (per Figure 7), and fault tolerance reduces to −20 V to +30 V-still sufficient for many industrial 0–10 V signal conditioning applications.

Can the ADG467BR-REEL7 be used in place of discrete diode clamps for ESD protection?

The ADG467BR-REEL7 is not a direct substitute for ESD-specific TVS diodes, as it lacks nanosecond-level transient response. However, it complements TVS devices by providing ultra-low leakage (<1 nA) clamping during sustained overvoltages and power-off protection-where TVS diodes fail. The datasheet recommends using both: TVS for fast ESD suppression and ADG467BR-REEL7 for DC fault and sequencing protection.

What is the thermal resistance (θJA) of the ADG467BR-REEL7 in its SOIC_W package?

The ADG467BR-REEL7 in the 18-lead SOIC_W (RW-18) package has a junction-to-ambient thermal resistance (θJA) of 160°C/W, as specified in the Absolute Maximum Ratings table. This value assumes standard JEDEC 2-layer board conditions (1 inch² copper pad). For high-density layouts, thermal relief via additional copper pour or thermal vias is recommended to maintain junction temperature within the −40°C to +125°C limit.