Analog Devices Inc. ADG5412BFBCPZ-RL7

Overview

ADG5412BFBCPZ-RL7 from Analog Devices is a quad SPST analog switch with bidirectional fault protection and detection, 10 Ω typical on-resistance, ±55 V overvoltage blocking capability, and integrated fault flag output. It operates from ±5 V to ±22 V dual supplies or 8 V to 44 V single supply, and is used in industrial data acquisition systems where signal integrity and robustness against field-induced transients are critical.

For engineers reviewing the ADG5412BFBCPZ-RL7 datasheet, ADG5412BFBCPZ-RL7 pinout, ADG5412BFBCPZ-RL7 application, or ADG5412BFBCPZ-RL7 equivalent, this device delivers verified overvoltage protection up to ±55 V on all switch pins, low on-resistance flatness (0.5 Ω max), 125°C operation, and fault detection with digital flag output - key selection criteria for high-reliability analog front-end switching.

Technical Context

The ADG5412BFBCPZ-RL7 implements trench-isolated, latch-up immune CMOS architecture with independent SPST switches that turn on with logic-high inputs. Each channel supports rail-to-rail analog signal range (VSS to VDD) and features bidirectional conduction with matched on-resistance (≤0.7 Ω max mismatch) and flatness (≤1.5 Ω max).

Fault protection is implemented via internal clamping and threshold detection: when any Sx or Dx pin exceeds VDD or VSS by >0.7 V, the affected switch turns off and the FF pin asserts low. Overvoltage response time is as fast as 250 ns (36 V supply), and recovery occurs within 2.7 µs maximum.

Key Specifications

Pinout & Package

ADG5412BFBCPZ-RL7 is packaged in a 16-lead LFCSP (3 mm × 3 mm, 0.5 mm pitch) with exposed pad connected internally to VSS. The package supports high thermal performance (θJA = 30.4°C/W on 4-layer board) and compact PCB layout for space-constrained modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad SPST analog switch applications.

Compared with ADG5412BFBCPZ-RL7, the ADG5412BRUZ offers identical functionality in a larger TSSOP package with reduced thermal performance, while the MAX14662ETA+ trades overvoltage robustness, fault visibility, and temperature range for lower on-resistance and cost - making ADG5412BFBCPZ-RL7 the sole choice for safety-critical, high-voltage, wide-temperature applications.

Availability

ADG5412BFBCPZ-RL7 is available at Aetrix Electronics and suitable for analog input/output modules, process control systems, and automatic test equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for ADG5412BFBCPZ-RL7 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 ADG54xxBF series was designed specifically for industrial and aerospace signal routing where overvoltage resilience, fault diagnostics, and wide-supply operation are mandatory - not merely desirable.

FAQ

What is the maximum continuous current per channel for ADG5412BFBCPZ-RL7?

The ADG5412BFBCPZ-RL7 supports up to 152 mA continuous current per channel at 25°C when using the LFCSP package and operating with VS biased 4.5 V away from the rails. At 125°C, this derates to 61 mA. These values are specified in Table 5 of the ADG5412BF/ADG5413BF datasheet Rev. B and reflect thermal limits of the 3 mm × 3 mm LFCSP package.

Does ADG5412BFBCPZ-RL7 require external pull-up resistors on the FF pin?

Yes, ADG5412BFBCPZ-RL7 features an open-drain FF (fault flag) output. An external pull-up resistor (typically 1 kΩ to 10 kΩ to VDD or IOVCC) is required to establish a valid high logic level during normal operation. The FF pin pulls low only during detected overvoltage events on any Sx or Dx terminal.

Can ADG5412BFBCPZ-RL7 operate with asymmetric dual supplies, such as +15 V and −5 V?

No. ADG5412BFBCPZ-RL7 requires symmetric dual supplies (e.g., ±15 V, ±20 V) or single-supply operation (8 V to 44 V). Asymmetric rails violate the absolute maximum rating for VDD to VSS (48 V max) and may exceed the ±22 V limit on either rail relative to GND, risking damage or undefined behavior.

How does the fault detection mechanism work in ADG5412BFBCPZ-RL7?

ADG5412BFBCPZ-RL7 monitors each Sx and Dx pin for voltage excursions beyond VDD or VSS by more than 0.7 V (VT). Upon detection, the affected switch turns off, and the FF pin transitions low. The fault condition persists until the overvoltage is removed and the device recovers - typically within 2.7 µs maximum at 36 V supply.

Is the exposed thermal pad on ADG5412BFBCPZ-RL7 required to be connected to VSS?

Yes. Per Analog Devices' datasheet Figure 4 and Table 7, the exposed pad is internally connected to VSS. For optimal thermal performance (θJA = 30.4°C/W) and mechanical reliability, it must be soldered to a VSS copper plane using standard reflow profile for Pb-free LFCSP packages. Leaving it floating degrades thermal dissipation and risks long-term solder joint fatigue.