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ADG408BRZ

8-ch analog mux, 100R Ron, +/-15V, break-before-make, SOIC-16

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Manufacturer Part：

ADG408BRZ

Package：

SOIC-16 (9.90 x 3.90 x 1.50 mm)

Brand：

Product Categories：

Integrated Circuits ICs, Interface ICs

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Description

Product Overview

The ADG408BRZ from Analog Devices is an 8-channel LC2MOS analog multiplexer that switches one of eight inputs to a common output based on 3-bit address lines, with 100 Ohm max on-resistance, +/-15V supply, and break-before-make switching in a 16-pin SOIC package.

Key Specifications

Configuration	8:1 multiplexer (1 circuit)
Supply Voltage	+/-15V dual or 12V single
On-Resistance	40 Ohm typical, 100 Ohm max
Signal Range	VSS to VDD
Supply Current	<75 uA
Channel Crosstalk	85 dB typical @ 100kHz
Switching Action	Break-before-make
Enable Input	Yes (active high)
Address Lines	3 (A0, A1, A2)
Operating Temperature	-40°C to +85°C
Package	SOIC-16

Features

8:1 analog multiplexer with 100 Ohm max on-resistance and break-before-make
+/-15V supply with VSS-to-VDD analog signal range and <75uA supply current
Direct replacement for DG408/DG409 with LC2MOS enhanced process

Applications

Data acquisition system channel selection and signal routing
Audio/video signal switching and automatic test equipment
Battery-powered sample-and-hold and communication systems

Product Introduction:ADG408BRZ Product Introduction

The ADG408BRZ from Analog Devices is a monolithic CMOS 8-channel analog multiplexer designed on the enhanced LC2MOS process. The device switches one of eight inputs to a common output as determined by 3-bit binary address lines A0, A1, and A2. An EN (enable) input activates or disables the device, with all channels off when EN is low. The on-resistance is 40 Ohm typical and 100 Ohm maximum over the full signal range and temperature. The LC2MOS process provides low power dissipation (<75uA supply current), high switching speed, and low on-resistance. Each channel conducts equally well in both directions, and the input signal range extends to the supply rails (VSS to VDD). All channels exhibit break-before-make switching action, preventing momentary shorting when switching channels. The device is a direct replacement for the DG408 with improved performance. The RZ suffix denotes the 16-pin SOIC package.

Working Principle:ADG408BRZ Working Principle

The ADG408BRZ operates as an 8-channel analog multiplexer using CMOS transmission gates. (1) Channel Selection: The 3-bit address (A2, A1, A0) is decoded by an internal logic circuit that activates one of eight transmission gates. Each transmission gate consists of parallel N-channel and P-channel MOSFETs, providing bidirectional signal conduction with low and relatively flat on-resistance across the signal range. (2) Break-Before-Make: When the address changes, the currently selected channel is disconnected before the new channel is connected. This prevents momentary shorting between two inputs, which could damage signal sources or corrupt data. (3) Enable: The EN input controls all channels simultaneously. When EN is low, all transmission gates are off, presenting a high impedance at the output. When EN is high, the addressed channel connects to the output. (4) LC2MOS Process: The enhanced LC2MOS (Low Capacitance CMOS) process minimizes parasitic capacitances, enabling fast switching and low charge injection. The low charge injection reduces output transients when switching between channels.

Pin Description:ADG408BRZ Pin Definition and Functions

Pin	Name	Function
1-8	S1-S8	Source inputs (8 channels)
9	D	Drain output (common)
10	EN	Enable (active high)
11	A0	Address bit 0
12	A1	Address bit 1
13	A2	Address bit 2
14	GND	Ground
15	VDD	Positive supply (+15V)
16	VSS	Negative supply (-15V)