Part A
ADG409BRUZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4488 個数
- Package
- TSSOP-16
- Series
- インターフェース - アナログスイッチ、マルチプレクサ、デマルチプレクサ
Replacement verdict
Compatible functional replacement candidate
The ADG408BRUZ and ADG409BRUZ share the same TSSOP-16 package, ±15 V dual-supply operation, and CMOS analog multiplexer architecture, making them functionally related candidates. However, the ADG408BRUZ is an 8-channel single-ended multiplexer while the ADG409BRUZ is a 4-channel differential multiplexer, so the replacement is only valid where the channel configuration and switching topology match the target application.
Channel Configuration
Validation required
Package Type
High match
Supply Voltage Range
High match
On-Resistance
Validation required
Parts at a glance
Part B
ADG408BRUZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2565 個数
- Package
- TSSOP-16
- Series
- インターフェース - アナログスイッチ、マルチプレクサ、デマルチプレクサ
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADG408BRUZ | ADG409BRUZ | Why it matters |
|---|---|---|---|
| Switch Configuration | 8:1 Multiplexer (single 8-to-1) | Dual 4:1 Multiplexer (two 4-to-1) | Determines channel topology; an 8:1 mux cannot directly replace a dual 4:1 mux in circuits requiring two independent multiplexed paths. |
| 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 routed, which is fundamental to functional substitutability. |
| On-Resistance (RON) | 100 Ω (typ) | 100 Ω (typ) | Lower on-resistance reduces signal attenuation and voltage drop; matching values support similar analog signal integrity. |
| Supply Voltage Range | ±5 V to ±15 V dual, or 12 V to 30 V single | ±5 V to ±15 V dual, or 12 V to 30 V single | Defines the operating voltage window; identical ranges allow use in the same power supply environment. |
| Package | 16-lead TSSOP | 16-lead TSSOP | Same package footprint enables drop-in PCB compatibility without layout changes. |
| Switching Time (tON/tOFF) | ~250 ns / ~150 ns (typ) | ~250 ns / ~150 ns (typ) | Determines maximum switching speed; similar timing supports comparable multiplexing performance. |
| Channel-to-Channel Crosstalk | ~-85 dB (typ at 100 kHz) | ~-85 dB (typ at 100 kHz) | Crosstalk affects signal isolation between channels; matching values indicate similar noise performance. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings ensure suitability for the same environmental conditions. |
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 | ADG409BRUZ | ADG408BRUZ |
|---|---|---|
| Part Status | Active | Active |
| Switch Circuit | SP4T | - |
| 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 |
Frequently asked questions
What is the primary functional difference between the ADG408BRUZ and ADG409BRUZ?
The ADG408BRUZ is an 8-channel analog multiplexer that connects one of eight inputs to a single common output, while the ADG409BRUZ is a 4-channel differential multiplexer that connects one of four differential input pairs to a single differential output pair. Both are CMOS analog multiplexers in a TSSOP-16 package.
Are the ADG408BRUZ and ADG409BRUZ pin-compatible?
No. Although both devices are housed in a 16-lead TSSOP (RU-16) package, their pin functions differ because the ADG408BRUZ provides eight single-ended channels and the ADG409BRUZ provides four differential channel pairs. The pin assignments are not interchangeable, so the PCB layout must match the specific device.
What are the key analog signal specifications shared by both devices?
Both the ADG408BRUZ and ADG409BRUZ operate from dual supplies of ±5 V to ±15 V or a single supply of 12 V to 44 V, feature low on-resistance, low leakage current, and TTL/CMOS-compatible digital control inputs. They are specified for break-before-make switching to prevent momentary shorting of adjacent channels.
Can the ADG408BRUZ and ADG409BRUZ be used interchangeably in an existing design?
No. Because the ADG408BRUZ is an 8-to-1 single-ended multiplexer and the ADG409BRUZ is a 4-to-1 differential multiplexer, their channel counts, signal topologies, and pin functions differ. Substitution requires redesign of the signal routing and PCB layout, and must be validated against the manufacturer datasheet.
What digital control interface do these multiplexers use?
Both devices use standard TTL/CMOS-compatible logic inputs for channel selection. The ADG408BRUZ uses three address lines (A0, A1, A2) to select one of eight channels, while the ADG409BRUZ uses two address lines (A0, A1) to select one of four differential channel pairs. Both include an enable input for turning all channels off.
What are the typical applications for each device?
The ADG408BRUZ is typically used for single-ended signal routing such as data acquisition front ends, audio switching, and test equipment. The ADG409BRUZ is suited for differential signal routing such as balanced audio, differential sensor interfaces, and instrumentation where common-mode rejection is important.
Do both devices support the same supply voltage range and package?
Yes. Both the ADG408BRUZ and ADG409BRUZ are specified for dual-supply operation from ±5 V to ±15 V or single-supply operation from 12 V to 44 V, and both are offered in the 16-lead TSSOP (RU-16) package. Supply decoupling and logic-level compatibility should still be verified against the respective datasheets.