Part A
ADG408BR
ADI公司
- Lifecycle
- Active
- Stock
- 5005 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 ADG408BR and ADG409BR-REEL share the same CMOS analog multiplexer family, 8-channel configuration, ±15 V dual-supply operation, and 16-lead SOIC footprint, making them functionally interchangeable in most designs. The ADG409BR-REEL provides a differential 4-channel configuration versus the single-ended 8-channel arrangement of the ADG408BR, so channel topology and on-resistance must be validated against the target application before substitution.
Channel Configuration
High match
Package Type
High match
On-Resistance
Validation required
Supply Voltage Range
Validation required
Parts at a glance
Part B
ADG409BR-REEL
ADI公司
- Lifecycle
- Active
- Stock
- 9583 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 | ADG408BR | ADG409BR-REEL | Why it matters |
|---|---|---|---|
| Switch Configuration | 8:1 Multiplexer (single 8-to-1) | Dual 4:1 Multiplexer (two 4-to-1) | Determines channel count and routing topology; an 8:1 mux cannot directly replace a dual 4:1 in circuits requiring two independent multiplexers. |
| Number of Channels | 1 channel (8 inputs to 1 output) | 2 channels (4 inputs to 1 output each) | Affects how many independent signal paths can be switched; critical for board layout and signal routing architecture. |
| On-Resistance (RON) | 100 Ω (typ) | 100 Ω (typ) | Lower on-resistance reduces signal attenuation and voltage drop; matching RON supports similar analog signal integrity. |
| Supply Voltage Range | ±15 V dual supply (or 12 V single) | ±15 V dual supply (or 12 V single) | Defines compatibility with the system power rails; identical ranges allow use in the same analog front-end designs. |
| Switch Time (tON/tOFF) | ~250 ns / ~150 ns (typ) | ~250 ns / ~150 ns (typ) | Switching speed affects multiplexing rate and settling in sampled-data systems; similar timing supports comparable dynamic performance. |
| Package | 16-lead SOIC | 16-lead SOIC | Footprint and pin count must match for drop-in board compatibility; identical packages simplify substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Ensures reliable operation across the intended environmental conditions; matching ranges support the same application environments. |
| Pin Configuration | Single mux control (A0-A2 address, EN) | Dual mux control (A0-A1 address per channel, EN) | Control logic and address lines differ, so firmware and PCB routing must be adapted; not a direct drop-in despite identical package. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADG408BR | ADG409BR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Obsolete | Obsolete |
| Switch Circuit | - | SP4T |
| Multiplexer / Demultiplexer Circuit | 8:1 | 4:1 |
| Number of Circuits | 1 | 2 |
| 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, 40pF | 11pF, 20pF |
| 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 |
Frequently asked questions
What is the main difference between the ADG408BR and ADG409BR-REEL?
The ADG408BR is an 8-channel analog multiplexer that connects one of eight inputs to a common output, while the ADG409BR is a 4-channel differential multiplexer that switches one of four differential input pairs to a common differential output. Both are CMOS analog multiplexers from Analog Devices in a 16-lead SOIC package, but they differ in channel configuration and switching topology.
Are the ADG408BR and ADG409BR-REEL pin-compatible?
No. Although both devices are housed in a 16-lead SOIC package, their pin functions differ because the ADG408BR is an 8-to-1 single-ended multiplexer and the ADG409BR is a 4-to-1 differential multiplexer. The pin assignments for signal inputs, outputs, and addressing are not interchangeable, so they cannot be treated as drop-in replacements.
What supply voltage range do the ADG408BR and ADG409BR-REEL support?
Both devices operate from dual supplies of ±15 V (typical) and support a single-supply range as well, with the analog signal range extending to the supply rails. Designers should confirm the exact specified limits in the respective Analog Devices datasheets before finalizing the power supply design.
What is the on-resistance of the ADG408BR and ADG409BR-REEL?
Both the ADG408BR and ADG409BR feature low on-resistance, typically around 100 Ω or less at ±15 V supplies, with on-resistance matching specified between channels. The exact maximum on-resistance and flatness values should be verified from the official Analog Devices datasheet for each part number.
How many address lines are required to control the ADG408BR versus the ADG409BR-REEL?
The ADG408BR requires three address lines (A0, A1, A2) to select one of eight single-ended channels. The ADG409BR requires two address lines (A0, A1) to select one of four differential channel pairs. Both devices include an enable input for turning all channels off.
Can the ADG408BR and ADG409BR-REEL be used in single-supply applications?
Yes. Both multiplexers are designed to operate from single supplies as well as dual supplies, making them suitable for single-supply systems. The analog signal range and logic threshold behavior under single-supply operation should be checked against the datasheet to ensure compatibility with the system's signal levels.
What are the typical applications for the ADG408BR and ADG409BR-REEL?
These multiplexers are commonly used in data acquisition systems, signal routing, test equipment, communication systems, and audio/video signal switching. The ADG408BR suits single-ended multi-channel signal selection, while the ADG409BR suits differential signal routing where common-mode rejection and paired signal integrity are important.
Does the ADG409BR-REEL differ functionally from the ADG409BR?
No. The "-REEL" suffix indicates tape-and-reel packaging for automated assembly; the electrical and functional specifications of the ADG409BR-REEL are the same as the standard ADG409BR device. The reel option affects packaging and handling, not device performance.