ADG819BRMZ

Updated: 2026-09-12

Overview

The ADG819BRMZ is a single-pole/double-throw (SPDT) analog switch from Analog Devices' precision switching portfolio. Designed for mission-critical signal routing applications, this component excels in environments requiring high signal integrity and minimal distortion. Its CMOS construction enables operation across industrial temperature ranges (-40°C to +125°C), making it suitable for harsh operating conditions. The device integrates ESD protection diodes compliant with JESD22-A114 standards, providing robustness against electrostatic discharge events up to 2kV. The MSOP-8 surface-mount package optimizes board space while maintaining thermal performance, aligning with modern high-density PCB designs.

Structure and Working Principle

Internally, the ADG819BRMZ utilizes a charge pump-based design to achieve rail-to-rail switching capability without requiring external voltage boost components. The switch topology incorporates N-channel and P-channel MOSFETs in parallel to maintain low on-resistance across the entire input signal range. A built-in level translator allows control logic compatibility with lower voltage microcontrollers. The break-before-make switching action introduces a 5ns (typical) dead time between channel transitions, preventing momentary short circuits during switching. This architecture ensures less than 0.1nA of leakage current at 25°C, critical for high-impedance measurement applications.

Key Features

With 0.5Ω typical on-resistance flatness across the signal range, the ADG819BRMZ maintains exceptional signal fidelity for precision measurement systems. The device achieves -78dB crosstalk at 1MHz, minimizing interference between channels in multiplexed configurations. Power consumption remains below 0.01μW in standby mode, supporting energy-sensitive designs. Notably, the switch exhibits only 0.5ns of propagation delay skew between channels, ensuring precise timing in synchronous sampling systems. The integrated charge pump operates at 300kHz, eliminating audible noise in audio applications while maintaining fast switching response.

Application Areas

Primary applications include automated test equipment (ATE) signal matrices, where the device's low charge injection (<5pC) prevents measurement errors in capacitive load scenarios. Medical imaging systems leverage its 200MHz bandwidth for clean signal transmission in ultrasound front-ends. The telecom industry utilizes these switches in baseband signal routing for 5G infrastructure. Industrial applications include PLC I/O modules, where the wide voltage range accommodates both 3.3V and 5V logic systems. Audio/video production equipment benefits from the -90dB off-isolation at 1MHz, preventing signal bleed-through in broadcast routing switchers.

Maintenance and Precautions

While the ADG819BRMZ requires no periodic maintenance, designers should implement proper PCB layout practices: minimize trace lengths to reduce parasitic capacitance, use ground planes beneath the device, and avoid routing high-frequency signals adjacent to control lines. Thermal vias are recommended when operating at maximum ambient temperatures. During handling, follow J-STD-033 standards for moisture sensitivity (MSL rating: 1). Avoid applying signals exceeding the supply rails, as this may forward-bias internal protection diodes. For unused inputs, tie them to ground through 10kΩ resistors to prevent floating node issues.

B2B Procurement Guide

Industrial buyers should verify lot date codes to ensure freshness, as prolonged shelf storage may affect moisture sensitivity performance. Consider purchasing through authorized distributors like Digi-Key or Mouser to guarantee authenticity - counterfeit devices often exhibit higher on-resistance. Minimum order quantities typically start at 100 units, with price breaks at 1k and 10k quantities. For design verification, request evaluation boards (EVAL-ADG819BRMZ) from the manufacturer. Lead times average 6-8 weeks for non-stock items, so plan procurement accordingly. Technical support includes SPICE models for simulation and IBIS models for signal integrity analysis.