Analog Devices Inc. ADG467BRSZ-REEL

Overview

ADG467BRSZ-REEL 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 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 protects sensitive ADC inputs during hot insertion or power sequencing failures.

For engineers reviewing the ADG467BRSZ-REEL datasheet, ADG467BRSZ-REEL pinout, ADG467BRSZ-REEL application, or ADG467BRSZ-REEL equivalent, key selection criteria include fault-clamped output behavior (VDD − 1.5 V / VSS + 1.5 V), trench-isolated latch-up immunity, SOIC/SSOP package compatibility, and sub-μA supply current under fault conditions.

Technical Context

The ADG467BRSZ-REEL implements eight independent channel protectors, each composed of two N-channel and two P-channel MOSFETs in series with trench isolation. During normal operation (VSS + 1.5 V < VSx < VDD − 1.5 V), it behaves as a low-RON series resistor. Under overvoltage, one MOSFET saturates to clamp output voltage while limiting fault current.

It supports both bipolar (±15 V) and unipolar (e.g., VDD = +10 V, VSS = 0 V) supplies. With power off (VDD = VSS = 0 V), all channels present open-circuit behavior with ±0.5 nA typical input leakage - critical for hot-swap rack systems where supply sequencing cannot be guaranteed.

Key Specifications

Pinout & Package

ADG467BRSZ-REEL is packaged in a 20-lead SSOP (RS-20), RoHS-compliant, with 0.65 mm pitch and 7.8 mm × 5.3 mm body size. Pin 10 is NC (no connect); all other pins are functional drain (VD1–VD8) or source (VS1–VS8) terminals, plus VDD and VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG467BRSZ-REEL, the SOIC variant offers mechanical compatibility but sacrifices thermal performance and density, while the ADG5412 requires additional control logic and does not inherently isolate powered-down channels - making ADG467BRSZ-REEL uniquely suited for unmanaged hot-insertion scenarios.

Availability

ADG467BRSZ-REEL is available at Aetrix Electronics and suitable for automated test equipment, precision measurement instrumentation, hot-insertion rack systems, and industrial data acquisition modules requiring stable component supply across extended product lifecycles.

Supply support for ADG467BRSZ-REEL 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 ADG467BRSZ-REEL belongs to Analog Devices' precision protection IC portfolio, engineered specifically for fault-resilient analog signal conditioning in mission-critical test and measurement systems where power sequencing cannot be guaranteed.

FAQ

What is the maximum continuous overvoltage the ADG467BRSZ-REEL can withstand with power disconnected?

The ADG467BRSZ-REEL withstands continuous analog input voltages 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 ±0.5 nA typical and preventing any current flow into downstream circuitry - a core requirement for hot-swap rack systems. This rating is explicitly specified in Table 2 (Absolute Maximum Ratings) of the ADG467BRSZ-REEL datasheet Rev. B.

Does the ADG467BRSZ-REEL require external components to achieve fault protection?

No, the ADG467BRSZ-REEL provides complete fault protection without external components. Its internal trench-isolated MOSFET structure self-clamps outputs to VDD − 1.5 V or VSS + 1.5 V during overvoltage and presents open-circuit behavior with power off. External 0.1 µF bypass capacitors on VDD and VSS are recommended for noise suppression but are not required for basic protection functionality per the ADG467BRSZ-REEL datasheet Figure 27 and Circuit Information section.

Can the ADG467BRSZ-REEL operate from a single +5 V supply?

Yes, the ADG467BRSZ-REEL supports unipolar operation: VDD = +5 V and VSS = 0 V. In this configuration, the fault clamp thresholds become +3.5 V (VDD − 1.5 V) and +1.5 V (VSS + 1.5 V). The on-resistance increases slightly versus ±15 V operation (see Figure 7), but remains within specification (≤95 Ω max). This mode is validated in the ADG467BRSZ-REEL datasheet's Dual Supply table and Typical Performance Characteristics.

What is the thermal resistance (θJA) of the ADG467BRSZ-REEL package?

The ADG467BRSZ-REEL uses a 20-lead SSOP (RS-20) package with a junction-to-ambient thermal resistance (θJA) of 130°C/W, as specified in Table 2 (Absolute Maximum Ratings) of the ADG467BRSZ-REEL datasheet Rev. B. This is 30°C/W lower than the SOIC version (160°C/W), enabling higher power density in compact layouts without derating at ambient temperatures up to +85°C.

Is the ADG467BRSZ-REEL latch-up immune, and what technology enables this?

Yes, the ADG467BRSZ-REEL is latch-up immune due to trench isolation - a dielectric oxide barrier physically separating NMOS and PMOS devices on the silicon die. This eliminates parasitic SCR formation, unlike junction-isolated processes. The ADG467BRSZ-REEL's latch-up immunity is guaranteed per JEDEC JESD78 and confirmed in the Trench Isolation section (Page 11) of its datasheet Rev. B.