Part A
ADG431BRZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4731 PCS
- Package
- SOIC-16
- Series
- Interface - Analog Switches, Multiplexers, Demultiplexers
Replacement verdict
Compatible functional replacement candidate
The ADG431BRZ and ADG432BR are both quad SPST CMOS analog switches from Analog Devices sharing the same 16-lead SOIC footprint and ±15 V dual-supply architecture, making them strong functional replacement candidates. The ADG431BRZ provides normally closed (NC) switch action, while the ADG432BR offers normally open (NO) action, so the replacement is viable only when the switch logic state is validated against the target circuit's default-state requirements.
Switch Configuration
High match
Package Type
High match
On-Resistance
Validation required
Supply Voltage Range
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADG431BRZ | ADG432BR | Why it matters |
|---|---|---|---|
| Switch Configuration | 4 x SPST (Normally Closed) | 4 x SPST (Normally Open) | Determines the default conduction state of each switch when the control logic is not asserted, which affects power-up behavior and fail-safe design. |
| Number of Channels | 4 | 4 | Defines how many independent signal paths can be switched, directly affecting channel count in the target design. |
| On-Resistance (RON) | 17 Ω (typ) | 17 Ω (typ) | Lower on-resistance reduces signal attenuation and voltage drop across the switch, important 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. |
| Logic Input Compatibility | 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 / 90 ns (typ) | 110 ns / 90 ns (typ) | Affects the maximum achievable switching frequency and settling behavior in multiplexing and sample-and-hold circuits. |
| Package | 16-Lead SOIC | 16-Lead SOIC | Confirms physical footprint and PCB layout compatibility for drop-in substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Verifies the device meets the environmental requirements of the target application. |
| Charge Injection | 5 pC (typ) | 5 pC (typ) | Low charge injection minimizes glitches on the switched signal, critical for precision analog and sample-and-hold applications. |
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 | ADG431BRZ | ADG432BR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Switch Circuit | SPST - NC | SPST - NO |
| Multiplexer / Demultiplexer Circuit | 1:1 | 1:1 |
| Number of Circuits | 4 | 4 |
| On - State Resistance(Max) | 24Ohm | 24Ohm |
| Channel - to - Channel Matching(ΔRon) | 1.2Ohm | 1.2Ohm |
| Voltage - Supply, Single (V+) | 12V | 12V |
| Voltage - Supply, Dual (V±) | ±15V | ±15V |
| Switch Time(Ton Toff)(Max) | 90ns, 60ns | 90ns, 60ns |
| Charge Injection | 5pC | 5pC |
| Channel Capacitance(CS(off)CD(off)) | 9pF, 9pF | 9pF, 9pF |
| Current - Leakage(IS(off))(Max) | 250pA | 250pA |
| Crosstalk | -85dB @ 1MHz | -85dB @ 1MHz |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the ADG431BRZ and ADG432BR analog switches?
The ADG431BRZ and ADG432BR are both quad SPST analog switches from Analog Devices, but they differ in switch configuration and control logic. The ADG431BRZ has four normally closed (NC) switches, while the ADG432BR has four normally open (NO) switches. Both are specified for dual-supply operation and are available in a 16-lead SOIC package.
Are the ADG431BRZ and ADG432BR pin-compatible?
Yes. Both devices are offered in the same 16-lead SOIC (R-16) package with an identical pinout, so they are pin-compatible. The functional difference is the switch state: the ADG431BRZ switches are closed by default, whereas the ADG432BR switches are open by default.
What are the on-resistance and supply voltage specifications for these switches?
Both the ADG431BRZ and ADG432BR feature low on-resistance (typically around 17 Ω) and are designed for dual-supply operation, typically ±15 V, with a specified signal range that extends to the supply rails. They also support single-supply operation. Designers should confirm exact limits against the respective Analog Devices datasheets.
Can the ADG431BRZ be replaced directly by the ADG432BR in an existing design?
Not without design review. Although the two parts are pin-compatible, their default switch states are opposite: the ADG431BRZ is normally closed and the ADG432BR is normally open. A direct substitution would invert the signal path behavior at power-up and during control-logic transitions, so the control logic and system default states must be validated first.
What control logic do the ADG431BRZ and ADG432BR use?
Both devices use standard CMOS/TTL-compatible logic inputs to control the switch states. The ADG431BRZ turns its switches off when the control input is logic high, while the ADG432BR turns its switches on when the control input is logic high, consistent with their normally closed and normally open configurations respectively.
Are these switches suitable for low-distortion audio or precision signal routing?
Yes. The ADG431BRZ and ADG432BR are general-purpose analog switches with low on-resistance and low charge injection, making them suitable for signal routing, sample-and-hold circuits, and audio switching where moderate precision is required. For applications demanding very low distortion or ultra-low leakage, designers should compare against the datasheet limits and consider specialized parts.
What package and operating temperature range do the ADG431BRZ and ADG432BR support?
Both parts are supplied in a 16-lead SOIC package and are rated for the industrial temperature range of −40 °C to +85 °C. The "BRZ" and "BR" suffixes denote the SOIC package and industrial grade; designers should verify the exact ordering code and grade against the Analog Devices datasheet before production release.