Analog Devices Inc. ADG467BR-REEL

Overview

ADG467BR-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 ADG467BR-REEL datasheet, ADG467BR-REEL pinout, ADG467BR-REEL application, or ADG467BR-REEL equivalent, key selection criteria include fault-clamped output behavior (VDD − 1.5 V / VSS + 1.5 V), trench-isolated latch-up immunity, power-off open-circuit state, low RON match (5 Ω max), and SOIC_W package compatibility with industrial temperature range (−40°C to +85°C).

Technical Context

The ADG467BR-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 linear 62 Ω resistor; outside this range, output clamping activates via MOSFET saturation.

With power off (VDD = VSS = 0 V), all transistors are fully off, limiting input leakage to ±0.5 nA typical and blocking signal paths. Fault response time is sub-50 ns, and clamping thresholds track supply rails with ±1.5 V offset due to NMOS/PMOS threshold voltages (VTN ≈ +1.5 V, VTP ≈ −1.5 V).

Key Specifications

Pinout & Package

ADG467BR-REEL is packaged in an 18-lead SOIC_W (RW-18) compliant with JEDEC MS-013-AB, 7.6 mm × 10.3 mm body, 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG467BR-REEL, ADG469BRZ-REEL offers double channel count in larger package but identical electrical protection specs, while MAX4677ESE+ trades 4 V fault margin and 4× leakage for pinout compatibility with older Maxim designs - neither is pin-compatible, requiring layout revision.

Availability

ADG467BR-REEL 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-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 ADG467BR-REEL belongs to Analog Devices' precision channel protection product line, engineered specifically for fault-resilient analog signal routing in environments where power sequencing is unreliable or overvoltage events are common.

FAQ

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

The ADG467BR-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 through the signal path. This makes ADG467BR-REEL ideal for hot-swap applications where power may be absent during connector engagement.

Does the ADG467BR-REEL require external components to function as a channel protector?

No, the ADG467BR-REEL operates as a complete channel protector with only VDD and VSS supplies required. It needs no external diodes, resistors, or capacitors to deliver ±40 V fault tolerance, power-off open-circuit behavior, or rail-tracked clamping. External RC networks shown in application diagrams are optional for enhanced sequencing control-not functional prerequisites for ADG467BR-REEL operation.

What is the on-resistance temperature coefficient of the ADG467BR-REEL?

The ADG467BR-REEL exhibits a typical on-resistance of 62 Ω at +25°C, rising to 80 Ω over the full −40°C to +85°C industrial range. Its RON flatness remains within 6 Ω across ±5 V input swing, ensuring minimal gain nonlinearity. This behavior is confirmed in Figure 5 of the datasheet, showing monotonic RON increase with temperature under ±15 V supplies.

Can the ADG467BR-REEL be used with single-supply operation?

Yes, the ADG467BR-REEL supports single-supply operation with VSS grounded. In this configuration, the lower clamp shifts to +1.5 V (VSS + 1.5 V), and the upper clamp remains at VDD − 1.5 V. The device maintains 62 Ω typical RON and ±1 nA leakage, but the usable analog input range narrows to +1.5 V to VDD − 1.5 V - verified in Figure 7 for VDD = 10.8 V to 20 V with VSS = 0 V.

Is the ADG467BR-REEL latch-up immune, and what technology enables this?

Yes, the ADG467BR-REEL is latch-up proof due to dielectric trench isolation separating P- and N-channel MOSFETs. Unlike junction-isolated CMOS, this structure eliminates parasitic SCR formation during overvoltage or ESD events. The trench isolation is explicitly documented in the Circuit Information section and validated across −40°C to +85°C - a core reliability feature of the ADG467BR-REEL design.