Analog Devices Inc. ADG467BRS-REEL

Overview

ADG467BRS-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 ADG467BRS-REEL datasheet, ADG467BRS-REEL pinout, ADG467BRS-REEL application, or ADG467BRS-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 ADG467BRS-REEL implements eight independent channel protectors, each consisting 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 to nanoampere levels when supplies are off.

It supports both bipolar (±15 V) and unipolar (e.g., VDD = +10 V, VSS = 0 V) operation. The SSOP-20 package variant (ADG467BRS-REEL) uses dedicated drain (VD1–VD8) and source (VS1–VS8) terminals per channel, with VDD and VSS power pins - no internal logic control or enable signals.

Key Specifications

Pinout & Package

ADG467BRS-REEL is packaged in a 20-lead SSOP (RS-20) with 0.65 mm pitch, 7.8 mm × 5.3 mm body size, and JEDEC MO-150-AE compliance. Pin 10 is NC (no connect); all other pins serve defined signal or supply roles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG467BRS-REEL, ADG467BRZ-REEL trades miniaturization for RoHS compliance and SOIC compatibility, while ADG469BRS-REEL reduces fault margin to lower cost - both retain identical channel count, trench isolation, and leakage performance.

Availability

ADG467BRS-REEL is available at Aetrix Electronics and suitable for automated test equipment, sensitive measurement instruments, hot-insertion rack systems, and industrial data acquisition modules requiring stable component supply across extended product lifecycles.

Supply support for ADG467BRS-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The ADG467 family was engineered specifically for fault-robust analog signal conditioning in mission-critical test and measurement systems where power sequencing cannot be guaranteed.

FAQ

What is the maximum continuous overvoltage the ADG467BRS-REEL can withstand with power supplies disconnected?

The ADG467BRS-REEL withstands 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 ±0.5 nA typical and preventing current flow into downstream circuitry. This capability is verified per Absolute Maximum Ratings Table 2 and Circuit Information Section.

Does the ADG467BRS-REEL require external control signals to operate?

No, the ADG467BRS-REEL requires no external control, enable, or logic signals. It operates autonomously: channels are normally on when powered (VDD/VSS applied), and automatically open-circuit when power is removed. Its protection function is entirely passive and voltage-driven - determined solely by the relationship between VSx/VDx voltages and the VDD/VSS rails.

How does the ADG467BRS-REEL differ from standard analog switches like the ADG1408?

Unlike general-purpose analog switches, the ADG467BRS-REEL is a dedicated channel protector with integrated overvoltage clamping, trench-isolated latch-up immunity, and power-off open-circuit behavior. The ADG1408 lacks fault protection circuitry, has higher RON (typically 9.5 Ω), and will suffer latch-up or destruction if subjected to ±40 V transients - making ADG467BRS-REEL the only suitable choice for ruggedized signal path protection.

Can the ADG467BRS-REEL be used with single-supply operation?

Yes, the ADG467BRS-REEL supports single-supply operation. For example, with VDD = +10 V and VSS = 0 V, it clamps positive overvoltages to +8.5 V (VDD − 1.5 V) and negative overvoltages to +1.5 V (VSS + 1.5 V). The device maintains 62 Ω typical RON and ±1 nA leakage under these conditions, as confirmed in the Dual Supply specifications table and Figure 7.

What is the thermal resistance (θJA) of the ADG467BRS-REEL in its SSOP-20 package?

The ADG467BRS-REEL in the 20-lead SSOP (RS-20) package has a junction-to-ambient thermal resistance (θJA) of 130°C/W, as specified in the Absolute Maximum Ratings table on page 4 of the Rev. B datasheet. This value assumes standard JEDEC 2-layer board conditions and enables thermal design for continuous operation up to +85°C ambient.