Part A
ADG442BRZ
ADI公司
- Lifecycle
- Active
- Stock
- 2533 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 ADG442BRZ and ADG444ABR are both quad SPST CMOS analog switches with comparable on-resistance and supply requirements, making the ADG444ABR a viable functional replacement candidate for the ADG442BRZ in most switching applications. Designers should confirm the logic-control polarity and package footprint against their specific board layout before substitution.
Switch Configuration
High match
On-Resistance
High match
Logic Control Input
Validation required
Package Type
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 | ADG442BRZ | ADG444ABR | Why it matters |
|---|---|---|---|
| Number of Switches | 4 (SPST, normally closed) | 4 (SPST, normally closed) | Both are quad SPST normally-closed switches, so channel count and default state match for direct functional substitution. |
| On Resistance (RON) | 70 Ω typical | 70 Ω typical | Matching on-resistance ensures similar signal attenuation and voltage drop in the signal path. |
| Supply Voltage Range | ±15 V dual or +12 V single (specified for ±15 V) | ±15 V dual or +12 V single (specified for ±15 V) | Compatible supply ranges allow the parts to operate in the same analog front-end rails without redesign. |
| Switch Time (tON / tOFF) | 110 ns / 60 ns typical | 110 ns / 60 ns typical | Similar switching speeds preserve timing behavior in multiplexing and sample-and-hold circuits. |
| Leakage Current (Off) | 0.5 nA typical | 0.5 nA typical | Low off-leakage maintains accuracy in high-impedance signal chains and precision measurement paths. |
| Package | 16-lead SOIC (R-16) | 16-lead SOIC (R-16) | Identical package and pinout enable drop-in board replacement without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Same temperature rating ensures equivalent environmental robustness for industrial applications. |
| Charge Injection | 20 pC typical | 20 pC typical | Equal charge injection prevents added glitch error when switching in precision analog circuits. |
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 | ADG442BRZ | ADG444ABR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| 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) | 70Ohm | 70Ohm |
| Voltage - Supply, Single (V+) | 12V | 12V |
| Voltage - Supply, Dual (V±) | ±15V | ±15V |
| Switch Time(Ton Toff)(Max) | 110ns, 60ns | 110ns, 60ns |
| Charge Injection | 1pC | 1pC |
| Channel Capacitance(CS(off)CD(off)) | 4pF, 4pF | 4pF, 4pF |
| Current - Leakage(IS(off))(Max) | 500pA | 500pA |
| Crosstalk | -100dB @ 1MHz | -100dB @ 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 ADG442BRZ and ADG444ABR analog switches?
The ADG442BRZ is a quad SPST normally closed (NC) switch, while the ADG444ABR is a quad SPST normally open (NO) switch. Both are members of Analog Devices' ADG44x family of CMOS analog switches featuring low on-resistance and fast switching, but they differ in switch configuration and specified performance grades.
Are the ADG442BRZ and ADG444ABR pin-compatible?
Both devices are offered in a 16-lead SOIC package (the "R" suffix in ADG442BRZ denotes SOIC, and the ADG444ABR is also supplied in a 16-lead SOIC). They share the same pinout family, but because one is normally closed and the other normally open, the switch states under identical logic input differ, so functional substitution requires design validation.
What is the on-resistance of these switches?
Both the ADG442BRZ and ADG444ABR are specified with low on-resistance in the range of approximately 40 to 70 ohms typical (depending on supply voltage and grade), consistent with the ADG441/442/443/444 family datasheet. Designers should consult the specific grade datasheet for guaranteed maximum RON over temperature.
What supply voltage range do the ADG442BRZ and ADG444ABR support?
These switches operate from dual supplies of ±15 V (with ±10% tolerance) or from a single supply of +12 V, consistent with the ADG44x family specifications. They also support logic-compatible control inputs, allowing direct interfacing with standard CMOS or TTL logic levels.
Can the ADG442BRZ be replaced by the ADG444ABR in an existing design?
Not directly without validation. The ADG442BRZ is normally closed (conducts when the control input is logic low), whereas the ADG444ABR is normally open (conducts when the control input is logic high). Replacing one with the other inverts the switch behavior unless the control logic is also inverted, so the circuit must be re-verified.
What are the switching times of these devices?
The ADG44x family features fast switching times, with turn-on and turn-off times typically in the tens of nanoseconds range (approximately 50 to 110 ns typical, depending on grade and load conditions). Exact guaranteed values should be taken from the respective manufacturer datasheet for the ADG442BRZ and ADG444ABR.
What package and operating temperature range do these parts use?
Both the ADG442BRZ and ADG444ABR are available in a 16-lead SOIC package and are specified for the industrial temperature range of −40 °C to +85 °C, consistent with the ADG44x family datasheet. The "B" grade denotes the industrial temperature version.