Part A
ADG409BR
ADI公司
- Lifecycle
- Active
- Stock
- 6238 件
- Package
- SOIC-16
- Series
- 介面-類比開關、多工器、解復用器
Replacement verdict
Compatible functional replacement candidate
The ADG409BR and ADG408BR-REEL are both 8-channel CMOS analog multiplexers from the same ADG408/ADG409 family, sharing identical TTL/CMOS-compatible logic, ±15 V dual-supply operation, and low on-resistance characteristics. However, they differ in switch configuration: the ADG409BR is a differential 4-channel (2-of-8) multiplexer, while the ADG408BR-REEL is a single-ended 8-channel (1-of-8) multiplexer. Because the channel topology is fundamentally different, the ADG409BR is not a direct drop-in substitute for the ADG408BR-REEL in single-ended signal-routing applications, though both remain functionally interchangeable within their respective multiplexer configurations.
Switch Configuration
Not compatible
Supply Voltage Range
High match
On-Resistance
High match
Package Type
High match
Parts at a glance
Part B
ADG408BR-REEL
ADI公司
- Lifecycle
- Active
- Stock
- 8224 件
- Package
- SOIC-16
- Series
- 介面-類比開關、多工器、解復用器
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADG409BR | ADG408BR-REEL | Why it matters |
|---|---|---|---|
| Switch Configuration | 4-channel differential (2 x 4:1) | 8-channel single-ended (1 x 8:1) | Determines whether the part routes differential pairs or single-ended signals, which is fundamental to circuit topology and cannot be substituted without redesign. |
| Number of Channels | 4 (differential) | 8 (single-ended) | Channel count defines how many signal paths can be multiplexed; a mismatch changes the number of inputs the system can handle. |
| On-Resistance (RON) | 100 Ω (typ) | 100 Ω (typ) | On-resistance affects signal attenuation and accuracy; matching values preserve signal integrity in the analog path. |
| Supply Voltage Range | ±15 V dual (or +12 V single) | ±15 V dual (or +12 V single) | The supply range must match the system rails to ensure proper switching and avoid damage; identical ranges allow drop-in use in the same rail environment. |
| Package / Mounting | 16-lead SOIC (surface mount) | 16-lead SOIC (surface mount, tape and reel) | Package and mounting style must match the PCB footprint; the reel packaging affects assembly handling but not the footprint. |
| Channel-to-Channel Matching | ΔRON 5 Ω (typ) | ΔRON 5 Ω (typ) | Matching between channels affects differential linearity and crosstalk; equal matching supports comparable signal fidelity. |
| Switching Time (tON/tOFF) | tON 175 ns / tOFF 150 ns (typ) | tON 175 ns / tOFF 150 ns (typ) | Switching speed determines how fast the multiplexer can route signals; identical timing preserves system throughput and timing margins. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range must cover the application environment; matching ranges ensure equivalent reliability under the same conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADG409BR | ADG408BR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Obsolete | Obsolete |
| Multiplexer / Demultiplexer Circuit | 4:1 | 8:1 |
| Number of Circuits | 2 | 1 |
| On - State Resistance(Max) | 100Ohm | 100Ohm |
| Channel - to - Channel Matching(ΔRon) | 15Ohm (Max) | 15Ohm (Max) |
| Voltage - Supply, Single (V+) | 12V | 12V |
| Voltage - Supply, Dual (V±) | ±15V | ±15V |
| Charge Injection | 20pC | 20pC |
| Channel Capacitance(CS(off)CD(off)) | 11pF, 20pF | 11pF, 40pF |
| Current - Leakage(IS(off))(Max) | 500pA | 500pA |
| Crosstalk | -85dB @ 100kHz | -85dB @ 100kHz |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Switch Circuit | SP4T | - |
Frequently asked questions
What are the key differences between the ADG409BR and ADG408BR-REEL?
The ADG409BR is a dual 4-channel (differential) CMOS analog multiplexer, while the ADG408BR-REEL is an 8-channel (single-ended) CMOS analog multiplexer. Both are members of the same ADG408/ADG409 family from Analog Devices, offer low on-resistance, and are controlled by 3-bit binary address inputs, but the ADG409 switches two differential channels simultaneously whereas the ADG408 switches one of eight single-ended channels. The "-REEL" suffix indicates tape-and-reel packaging for automated assembly.
Are the ADG409BR and ADG408BR-REEL pin-compatible?
No. Although both devices are offered in 16-lead packages (such as 16-lead DIP or SOIC), their pin functions differ because the ADG409 provides two differential 4-channel multiplexers while the ADG408 provides a single 8-channel multiplexer. The address, enable, and signal pin assignments are not identical, so they cannot be treated as drop-in replacements without verifying the pinout against the respective Analog Devices datasheets.
What supply voltage range do the ADG409BR and ADG408BR-REEL support?
Both devices operate from dual supplies of ±15 V (with a specified range of ±10 V to ±15 V) or from a single supply of +12 V. They are fabricated on Analog Devices' CMOS process and are specified for bipolar analog signal handling within these supply rails. Designers should confirm the exact limits and derating in the official ADG408/ADG409 datasheet before finalizing a design.
What is the on-resistance of the ADG409BR and ADG408BR-REEL?
Both the ADG409BR and ADG408BR-REEL are specified with a typical on-resistance of approximately 100 Ω (maximum around 100 Ω at ±15 V supplies, per the Analog Devices ADG408/ADG409 datasheet). On-resistance varies with supply voltage and analog input level, so the datasheet curves should be consulted for the specific operating conditions of the application.
What is the difference between the "BR" and "BR-REEL" suffixes?
The "BR" suffix denotes the commercial temperature-grade device in a specified package (typically 16-lead SOIC or DIP), while "BR-REEL" indicates the same device supplied on tape-and-reel for high-volume automated pick-and-place assembly. Electrically and functionally the two suffixes refer to the same silicon; the difference is packaging and shipping format, not performance.
Can the ADG409BR be used to switch differential signals while the ADG408BR-REEL switches single-ended signals?
Yes. The ADG409 is specifically configured as two 4-channel differential multiplexers, making it suitable for switching differential signal pairs, whereas the ADG408 is an 8-channel single-ended multiplexer intended for single-ended signal routing. Selecting between them depends on whether the application requires differential or single-ended channel switching.
What are the typical applications for the ADG409BR and ADG408BR-REEL?
Both devices are used in data acquisition systems, signal routing, test and measurement equipment, communication systems, and audio/video signal switching. The ADG408BR-REEL is typically chosen for single-ended multi-channel routing, while the ADG409BR is chosen when differential signal pairs must be multiplexed, such as in precision instrumentation and differential sensor interfaces.