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-REEL7 are both CMOS analog multiplexers from the same ADG408/ADG409 family, sharing a common 16-lead SOIC footprint, supply range, and switch architecture, so the ADG409BR can serve as a functional replacement candidate for the ADG408BR-REEL7 in many designs. The primary distinction is configuration: the ADG409BR is a differential 4-channel (2-of-8) multiplexer, while the ADG408BR-REEL7 is a single-ended 8-channel (1-of-8) multiplexer. Engineers must confirm that the differential channel arrangement, on-resistance, and switching timing satisfy the target application before committing to the substitution.
Channel Configuration
Validation required
Package Type
High match
Supply Voltage Range
High match
On-Resistance
Validation required
Parts at a glance
Part B
ADG408BR-REEL7
ADI公司
- Lifecycle
- Active
- Stock
- 9464 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-REEL7 | 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 fundamentally changes the circuit topology and cannot be substituted without redesign. |
| Number of Channels | 4 (differential) | 8 (single-ended) | Channel count dictates how many signal sources can be multiplexed; a mismatch affects system capacity and PCB layout. |
| On-Resistance (RON) | 100 Ω (typ) | 100 Ω (typ) | On-resistance directly affects signal attenuation and accuracy; matching values preserve signal integrity when swapping parts. |
| Supply Voltage Range | ±15 V dual (or +12 V single) | ±15 V dual (or +12 V single) | The operating supply range must match the system rails to ensure proper switching and avoid damage. |
| Package | 16-lead SOIC | 16-lead SOIC | Identical package footprint allows drop-in replacement on the same PCB pad layout. |
| Switching Time (tON/tOFF) | ~150 ns / ~150 ns (typ) | ~150 ns / ~150 ns (typ) | Switching speed affects multiplexing rate and settling behavior; similar timing preserves system timing margins. |
| Leakage Current (Off) | 0.1 nA (typ) | 0.1 nA (typ) | Low off-leakage is critical for high-impedance signal paths and precision measurement accuracy. |
| Control Logic | TTL/CMOS compatible | TTL/CMOS compatible | Compatible logic levels ensure the part can be driven directly by standard digital control signals. |
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 | ADG409BR | ADG408BR-REEL7 |
|---|---|---|
| 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-REEL7?
The ADG409BR is a dual 4-channel (differential) CMOS analog multiplexer, while the ADG408BR-REEL7 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 provides two independent 4-to-1 differential paths whereas the ADG408 provides one 8-to-1 single-ended path.
Are the ADG409BR and ADG408BR-REEL7 pin-compatible?
No. Although both are offered in 16-lead SOIC packages, their pin functions differ because the ADG409 is a differential dual 4-channel device and the ADG408 is a single-ended 8-channel device. 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 datasheets.
What supply voltage range do the ADG409BR and ADG408BR-REEL7 support?
Both devices operate from dual supplies of ±5 V to ±15 V or from a single supply of 12 V to 44 V, per the Analog Devices ADG408/ADG409 datasheet. The digital control inputs are compatible with standard CMOS and TTL logic levels when the appropriate supply is used.
What is the on-resistance specification for these multiplexers?
Both the ADG409BR and ADG408BR-REEL7 are specified with a typical on-resistance of approximately 100 Ω at ±15 V dual supplies, with a maximum on-resistance in the range of 150 Ω to 200 Ω depending on the grade and supply conditions. The on-resistance is relatively flat over the analog signal range, which helps maintain signal integrity.
What are the switching times of the ADG409BR and ADG408BR-REEL7?
Per the Analog Devices datasheet, both devices feature fast switching with typical transition times (tON/tOFF) in the range of 100 ns to 200 ns at ±15 V supplies. The ADG408 and ADG409 share similar switching characteristics because they are built on the same CMOS process and architecture.
What is the difference between the "BR" and "BR-REEL7" suffixes?
The "BR" suffix indicates the commercial temperature grade (0 °C to +70 °C) in a 16-lead SOIC package. The "-REEL7" suffix on the ADG408BR-REEL7 indicates that the parts are supplied on a 7-inch tape-and-reel for automated assembly. The ADG409BR is typically supplied in tube or tray form; the electrical specifications of the die are the same for the equivalent grade.
Can the ADG408BR-REEL7 be used to replace the ADG409BR in an existing design?
Not directly. Because the ADG408 is an 8-channel single-ended multiplexer and the ADG409 is a dual 4-channel differential multiplexer, the channel count, signal routing, and pin assignments differ. A replacement requires redesigning the signal path and verifying the address decoding, enable logic, and PCB layout against the ADG408 datasheet.
What are the typical applications for the ADG409BR and ADG408BR-REEL7?
Both devices are used in signal routing, data acquisition systems, test and measurement equipment, communication systems, and audio/video signal switching. The ADG408BR-REEL7 is suited to single-ended 8-channel multiplexing, while the ADG409BR is suited to differential signal switching where common-mode rejection and paired signal routing are required.