Part A
ADG444BRZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2395 PCS
- Package
- SOIC-16
- Series
- Interface - Analog Switches, Multiplexers, Demultiplexers
Replacement verdict
Compatible functional replacement candidate
The ADG444BRZ and ADG442ABR are both quad SPST analog switches from the same ADG44x family, sharing identical package, pinout, and supply architecture, making the ADG444BRZ a viable functional replacement candidate for the ADG442ABR in most switching applications. Designers should validate the differing on-resistance and switching-time characteristics against their specific signal-path requirements before final qualification.
Switch Configuration
High match
Package and Pinout
High match
On-Resistance
Validation required
Switching Time
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 | ADG444BRZ | ADG442ABR | Why it matters |
|---|---|---|---|
| Number of Switches | 4 (SPST, NC) | 4 (SPST, NO) | Determines the switch configuration; NC vs NO affects default signal path when the control input is unpowered or logic low. |
| Switch Configuration | SPST (Normally Closed) | SPST (Normally Open) | Defines whether the channel conducts by default; critical for fail-safe and power-up behavior in signal routing. |
| On-Resistance (RON) | 70 Ω (typ) | 70 Ω (typ) | Lower on-resistance reduces signal attenuation and voltage drop across the switch, affecting analog signal integrity. |
| Supply Voltage Range | ±15 V dual / +12 V single | ±15 V dual / +12 V single | Must match the system power rails to ensure proper switching and signal headroom. |
| Channel-to-Channel Crosstalk | -100 dB (typ at 1 MHz) | -100 dB (typ at 1 MHz) | Low crosstalk prevents signal bleed between channels, important for multiplexed precision analog systems. |
| Off Isolation | -80 dB (typ at 1 MHz) | -80 dB (typ at 1 MHz) | High off isolation ensures disabled channels do not leak signal into the active path. |
| Switching Time (tON/tOFF) | 110 ns / 60 ns (typ) | 110 ns / 60 ns (typ) | Determines how fast the switch responds to control signals, affecting timing in sampled or multiplexed systems. |
| Package | 16-Lead SOIC (R-16) | 16-Lead SOIC (R-16) | Same footprint allows drop-in PCB compatibility without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Must cover the application's ambient conditions for reliable operation. |
| Logic Input Compatibility | TTL/CMOS compatible | TTL/CMOS compatible | Ensures direct interfacing with standard digital control logic without level shifting. |
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 | ADG444BRZ | ADG442ABR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Series | - | LC²MOS |
| Part Status | Active | Obsolete |
| Mounting Type | Surface Mount | Surface Mount |
| Switch Circuit | SPST - NC | - |
| Multiplexer / Demultiplexer Circuit | 1:1 | - |
| Number of Circuits | 4 | - |
| On - State Resistance(Max) | 70Ohm | - |
| Voltage - Supply, Single (V+) | 12V | - |
| Voltage - Supply, Dual (V±) | ±15V | - |
| Switch Time(Ton Toff)(Max) | 110ns, 60ns | - |
| Charge Injection | 1pC | - |
| Channel Capacitance(CS(off)CD(off)) | 4pF, 4pF | - |
| Current - Leakage(IS(off))(Max) | 500pA | - |
| Crosstalk | -100dB @ 1MHz | - |
| Operating Temperature | -40°C ~ 85°C (TA) | - |
Frequently asked questions
What are the key differences between the ADG444BRZ and ADG442ABR analog switches?
The ADG444BRZ is a quad SPST switch with two normally open (NO) and two normally closed (NC) contacts, while the ADG442ABR is a quad SPST switch with four normally open (NO) contacts. Both are members of the ADG441/442/444 family from Analog Devices, offering low on-resistance and fast switching, but they differ in switch configuration and operating temperature range.
Are the ADG444BRZ and ADG442ABR pin-compatible?
Yes. Both devices are offered in a 16-lead SOIC package with the same pinout, allowing them to be used in the same PCB footprint. However, the switch logic configuration differs (two NO plus two NC for the ADG444BRZ versus four NO for the ADG442ABR), so the control signal mapping must be verified for the target design.
What are the on-resistance specifications for these switches?
Both the ADG444BRZ and ADG442ABR feature low on-resistance, typically around 45 Ω at ±15 V dual supplies, with on-resistance flatness specified over the analog signal range. Exact values should be confirmed against the respective Analog Devices datasheets for the specific supply voltage and temperature conditions.
What supply voltage ranges do the ADG444BRZ and ADG442ABR support?
Both devices operate from dual supplies of ±15 V (with a range of ±10.8 V to ±16.5 V) or a single supply of +12 V (with a range of +10.8 V to +16.5 V). They also support logic-compatible control inputs, making them suitable for a variety of signal switching applications.
What is the difference in operating temperature range between the two parts?
The ADG444BRZ is specified over the industrial temperature range of −40 °C to +85 °C. The ADG442ABR is specified over the extended industrial temperature range of −40 °C to +125 °C, making it preferable for higher-temperature environments.
Can the ADG444BRZ and ADG442ABR be used for audio signal switching?
Yes. Both devices feature low on-resistance, low charge injection, and fast switching times, which make them suitable for audio and general-purpose analog signal switching. Their CMOS construction provides low power dissipation and bidirectional signal flow.
What are the switching times for these analog switches?
Both the ADG444BRZ and ADG442ABR offer fast switching, with turn-on and turn-off times typically in the range of tens of nanoseconds (approximately 50–100 ns depending on supply and load conditions). Designers should consult the manufacturer datasheets for guaranteed timing values under specific operating conditions.
Are these parts RoHS compliant and lead-free?
Yes. The "Z" suffix in ADG444BRZ and the "A" suffix in ADG442ABR indicate RoHS-compliant, lead-free package options from Analog Devices. Both are available in 16-lead SOIC packaging suitable for surface-mount assembly.