ADG409BRZ Overview
The ADG409BRZ is a high-performance CMOS analog multiplexer from Analog Devices. It belongs to the ADG408/ADG409 product family. The device offers four differential channels. A 2-bit binary address (A0, A1) selects any one channel and routes it to the common differential port. It also includes an EN enable pin. When disabled, all channels are turned off to block signal transmission and improve system safety.
The ADG409BRZ uses an enhanced LC²MOS process. It achieves low power consumption, fast switching, and low on-resistance. Its channels support bidirectional signal flow and full power-supply signal swing. This ensures strong isolation in both on and off states. Break-Before-Make switching avoids short-term shorts during transitions. It maintains system stability and reduces switching noise. Low charge injection minimizes transient distortion, making the device suitable for precision analog applications.
As an upgraded replacement for the DG409, the ADG409BRZ provides improved performance and reliability. It is well suited for data acquisition systems, signal switching matrices, measurement and control equipment, and other applications requiring accurate multi-channel signal routing. For low-power, high-isolation, and high-linearity designs, the ADG409BRZ is a trusted analog front-end switch solution.
ADG409BRZ Specifications
Parameter | Value |
Part Number | ADG409BRZ |
Description | IC MULTIPLEXER DUAL 4X1 16SOIC |
Lead Free Status / RoHS Status | Lead free / RoHS Compliant |
Packaging | Tube |
Supplier Device Package | 16-SOIC (0.154, 3.90mm Width) |
Manufacturer Standard Lead Time | 19 Weeks |
Charge Injection | 20pC |
Detailed Description | 2 Circuit IC Switch 4:1 100 Ohm 16-SOIC |
Crosstalk | -85dB @ 100kHz |
Operating Temperature | -40°C ~ 85°C (TA) |
Channel-to-Channel Matching (ΔRon) | 15 Ohm (Max) |
Multiplexer/Demultiplexer Circuit | 4:1 |
Current - Leakage (IS(off)) (Max) | 500pA |
Voltage - Supply, Dual (V±) | ±15V |
Voltage - Supply, Single (V+) | 12V |
Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Channel Capacitance (CS(off), CD(off)) | 11pF, 20pF |
Number of Circuits | 2 |
On-State Resistance (Max) | 100 Ohm |
ADG409BRZ Pin Configurations
A0: Logic Control Input.
EN: Active High Digital Input. When low, the device is disabled and all switches are off. When high, Ax logic inputs determine on switches.
VSS: Most Negative Power Supply Potential in Dual Supplies. In single-supply applications, it can be connected to ground.
S1A: Source Terminal 1A. Can be an input or an output.
S2A: Source Terminal 2A. Can be an input or an output.
S3A: Source Terminal 3A. Can be an input or an output.
S4A: Source Terminal 4A. Can be an input or an output.
DA: Drain Terminal A. Can be an input or an output.
DB: Drain Terminal B. Can be an input or an output.
S4B: Source Terminal 4B. Can be an input or an output.
S3B: Source Terminal 3B. Can be an input or an output.
S2B: Source Terminal 2B. Can be an input or an output.
S1B: Source Terminal 1B. Can be an input or an output.
VDD: Most Positive Power Supply Potential.
GND: Ground (0 V) Reference.
A1: Logic Control Input.
ADG409BRZ Highlights
44 V supply maximum ratings
VSS to VDD analog signal range
Low on resistance (100 Ω maximum)
Low power (ISUPPLY < 75 μA)
Fast switching
Break-before-make switching action
Plug-in replacement for DG409
Low Power Dissipation.
Extended Signal Range.
Low Ron.
Single-Supply Operation.
ADG409BRZ Functional Block Diagram
This diagram shows the internal logic of the ADG409. It is a dual 4-to-1 analog multiplexer. The structure has two parallel signal paths: Channel A (S1A to S4A to DA) and Channel B (S1B to S4B to DB).
At the bottom, the “1-of-4 decoder” is the control core. It receives three digital inputs: A0, A1, and EN.
EN (Enable): This is the main switch. The device works only when EN is active. If EN is inactive, all switches turn off.
A0 and A1: These two address bits select one of the four channels by a binary code (00, 01, 10, 11). The dashed lines show that Channel A and Channel B always switch together.
The switch symbols show that the ADG409 uses analog switch elements. They allow current to flow in both directions. This design gives low on-resistance and high off-isolation. With the common pins DA and DB, the device can route up to four differential input pairs to the next stage, such as a differential ADC or an instrumentation amplifier. It helps simplify multi-channel data acquisition systems.
ADG409BRZ Applications
1. Audio and Video Routing
ADG409BRZ supports full-swing differential signal transmission. It offers low noise and low distortion when switching. It is ideal for audio switching matrices, home theater systems, and multimedia switchers. In video systems, it can be used for multi-camera signal routing and surveillance front-end switching. It helps improve image quality and signal reliability.
2. Automatic Test Equipment (ATE)
Production test systems often need to scan multiple channels. ADG409BRZ can be easily controlled by an MCU or FPGA. It allows fast switching between test channels. Its high isolation prevents inactive channels from affecting the measurement results. It improves test accuracy and efficiency.
3. Data Acquisition Systems
For multi-sensor inputs, ADG409BRZ can work as a front-end signal selector. It routes multiple differential sensor signals to a single ADC. This helps reduce system cost. Its low charge injection ensures stable sampling without switching artifacts.
4. Battery-Powered Systems
Thanks to its enhanced LC²MOS process, ADG409BRZ achieves very low power consumption and low leakage. It helps extend battery life. It is suitable for portable medical devices, wearable products, and handheld instruments.
5. Sample-and-Hold Systems
The switch has excellent on-state performance with low on-resistance and low distortion. It ensures stable signal selection during sampling. It improves the accuracy and linearity of sample-and-hold circuits.
6. Communication Systems
In wireless systems, baseband signal routing, and modem circuits, ADG409BRZ provides flexible switching for differential signals. It supports bidirectional signal flow and maintains high isolation. It is suitable for high-speed interface switching applications.
ADG409BRZ Outline Dimensions
ADG409BRZ Outline Dimensions
This section provides detailed outline dimensions of the ADG409BRZ device. The figure below shows the precise physical dimensions of its 16-lead narrow-body surface-mount package (such as 16-SOIC). All key measurements are marked in both millimeters (mm) and inches (inch).
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