Part A
ADG452BRZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 1368 PCS
- Package
- SOIC-16
- Series
- Interfaces - commutateurs analogiques, multiplexeurs, démultiplexeurs
Replacement verdict
Compatible functional replacement candidate
The ADG452BRZ and ADG451BR are quad SPST analog switches from the same Analog Devices family, sharing identical package, pinout, and supply architecture. The ADG452BRZ offers a lower on-resistance of 5 Ω versus 4 Ω typical for the ADG451BR, with closely matched switching characteristics. Both devices are functionally interchangeable in most signal-switching applications, though designers should verify on-resistance headroom and timing margins against their specific circuit requirements.
Switch Configuration
High match
Package Type
High match
On-Resistance
Validation required
Supply Voltage Range
High match
Parts at a glance
Part B
ADG451BR
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5953 PCS
- Series
- Interfaces - commutateurs analogiques, multiplexeurs, démultiplexeurs
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADG452BRZ | ADG451BR | Why it matters |
|---|---|---|---|
| Switch Configuration | 4 x SPST (Normally Open) | 4 x SPST (Normally Closed) | Determines the default conduction state of each switch when the control logic is not asserted, which affects fail-safe behavior and circuit topology. |
| Number of Channels | 4 | 4 | Defines how many independent signals can be routed through a single package, affecting board space and channel count in the design. |
| On Resistance (RON) | 5 Ω (typical) | 5 Ω (typical) | Low on resistance minimizes signal attenuation and voltage drop across the switch, which is critical for precision analog signal routing. |
| Supply Voltage Range | ±4.5 V to ±20 V dual, or 4.5 V to 40 V single | ±4.5 V to ±20 V dual, or 4.5 V to 40 V single | Determines compatibility with the system power rails and the allowable analog signal swing range. |
| Package | 16-Lead SOIC (Narrow) | 16-Lead SOIC (Narrow) | Footprint and pinout compatibility allow drop-in replacement on an existing PCB layout. |
| Control Logic Interface | TTL/CMOS compatible | TTL/CMOS compatible | Ensures the switch can be driven directly by standard digital logic levels without level shifting. |
| Switching Time (tON/tOFF) | ~110 ns / ~70 ns (typical) | ~110 ns / ~70 ns (typical) | Affects the maximum signal switching rate and settling behavior in multiplexing and sample-and-hold applications. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Confirms suitability for industrial and commercial environments with matching thermal tolerances. |
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 | ADG452BRZ | ADG451BR |
|---|---|---|
| Part Status | Active | Obsolete |
| Switch Circuit | SPST - NO | SPST - NC |
| Multiplexer / Demultiplexer Circuit | 1:1 | 1:1 |
| Number of Circuits | 4 | 4 |
| On - State Resistance (Max) | - | 5Ohm |
| Channel - to - Channel Matching (ΔRon) | - | 100mOhm |
| Voltage - Supply, Single (V+) | 12V | 12V |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 20V | ±4.5V ~ 20V |
| Switch Time (Ton, Toff) (Max) | - | 180ns, 140ns |
| Charge Injection | 20pC | 20pC |
| Channel Capacitance (CS(off), CD(off)) | - | 37pF, 37pF |
| Current - Leakage (IS(off)) (Max) | - | 500pA |
| Crosstalk | -90dB @ 1MHz | -90dB @ 1MHz |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | - | ADG451 |
| On - State Resistance(Max) | 5Ohm | - |
| Channel - to - Channel Matching(ΔRon) | 100mOhm | - |
| Switch Time(Ton Toff)(Max) | 180ns, 140ns | - |
| Channel Capacitance(CS(off)CD(off)) | 37pF, 37pF | - |
| Current - Leakage(IS(off))(Max) | 500pA | - |
Frequently asked questions
What are the primary differences between the ADG452BRZ and the ADG451BR?
Both are quad single-pole single-throw (SPST) analog switches from Analog Devices. The ADG452BRZ features a normally open (NO) switch configuration, while the ADG451BR features a normally closed (NC) configuration. Both are specified for dual-supply operation and are available in a 16-lead SOIC package.
Are the ADG452BRZ and ADG451BR pin-compatible?
Yes. Both devices are offered in the same 16-lead SOIC (R-16) package with an identical pinout. The pin functions are the same; the difference is the switch logic state (NO vs. NC) for each channel.
What is the on-resistance of these switches?
Both the ADG452BRZ and ADG451BR are specified with an on-resistance of typically 4 Ω (maximum 5 Ω) at dual ±15 V supplies, making them suitable for low-distortion signal switching applications.
What supply voltages do the ADG452BRZ and ADG451BR support?
Both devices operate from dual supplies of ±4.5 V to ±20 V, or from a single supply of 4.5 V to 40 V. They are specified for ±15 V dual-supply operation in the datasheet.
Can the ADG452BRZ be used as a drop-in replacement for the ADG451BR?
Not directly. Although the packages and pinouts are identical, the switch logic is inverted: the ADG452BRZ channels are normally open, while the ADG451BR channels are normally closed. A replacement requires verifying that the system's default (unpowered/de-asserted) state is acceptable.
What are the switching times of these devices?
Both the ADG452BRZ and ADG451BR feature fast switching times, with tON and tOFF typically around 70 ns and 60 ns respectively at ±15 V supplies, per the Analog Devices datasheet.
Do these switches provide break-before-make operation?
These are SPST switches, so break-before-make behavior is not applicable in the same way as for SPDT/DPDT devices. Each channel simply opens or closes independently; the ADG452BRZ closes when logic high is applied, while the ADG451BR opens when logic high is applied.