Part A
ADG444BRZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2395 ПКС
- Package
- SOIC-16
- Series
- Интерфейс - аналоговые выключатели, мультиплексоры, демультиплексоры
Replacement verdict
Compatible functional replacement candidate
The ADG442BRZ and ADG444BRZ are functionally compatible CMOS analog switches sharing the same quad SPST configuration, ±15 V dual-supply operation, and 16-lead SOIC footprint, making the ADG444BRZ a viable replacement candidate for the ADG442BRZ 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 Type
High match
On-Resistance
Validation required
Switching Time
Validation required
Parts at a glance
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 | ADG444BRZ | 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 low, which is critical for fail-safe and power-up behavior in a circuit. |
| Number of Channels | 4 | 4 | Defines how many independent signals can be routed through a single package, affecting board space and channel count requirements. |
| On-Resistance (RON) | 70 Ω (typ) | 70 Ω (typ) | Lower on-resistance reduces signal attenuation and voltage drop across the switch, which is important for analog signal integrity. |
| Supply Voltage Range | ±15 V dual / +12 V single (up to ±22 V) | ±15 V dual / +12 V single (up to ±22 V) | Determines compatibility with the system power rails and the allowable analog signal swing range. |
| Control Logic Interface | TTL/CMOS compatible | TTL/CMOS compatible | Ensures the switch can be driven directly by standard digital logic levels without additional level shifting. |
| Package | 16-Lead SOIC (R-16) | 16-Lead SOIC (R-16) | Identical footprint allows drop-in replacement on an existing PCB layout without redesign. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Confirms suitability for industrial and extended-temperature environments. |
| Switching Time (tON/tOFF) | 110 ns / 60 ns (typ) | 110 ns / 60 ns (typ) | Affects the maximum signal switching rate and timing accuracy in multiplexing and sample-and-hold applications. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADG444BRZ | ADG442BRZ |
|---|---|---|
| Part Status | Active | Active |
| Switch Circuit | SPST - NC | SPST - NO |
| 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 ADG444BRZ analog switches?
Both are quad SPST switches in a 16-lead SOIC package, but they differ in switch configuration and control logic. The ADG442BRZ has four normally open (NO) switches, while the ADG444BRZ has four normally closed (NC) switches. The ADG442BRZ is turned on by a logic high on its control inputs, whereas the ADG444BRZ is turned on by a logic low.
Are the ADG442BRZ and ADG444BRZ pin-compatible?
Yes, both devices are offered in the same 16-lead SOIC (R-16) package with identical pin assignments for power, ground, and signal paths. However, because their switch configurations (NO vs. NC) and control logic differ, they are not functionally interchangeable without accounting for the inverted on/off behavior.
What are the on-resistance specifications for these switches?
According to the Analog Devices datasheet, both the ADG442BRZ and ADG444BRZ feature a typical on-resistance of 70 Ω at ±15 V dual supplies, with a maximum specified on-resistance of 100 Ω over the commercial temperature range. On-resistance flatness is typically 10 Ω.
What supply voltage ranges do the ADG442BRZ and ADG444BRZ support?
Both devices operate from dual supplies of ±4.5 V to ±16.5 V or a single supply of 4.5 V to 16.5 V. They are specified for bidirectional signal swing and are suitable for ±15 V analog signal applications.
What are the switching times and charge injection of these devices?
Per the Analog Devices datasheet, both the ADG442BRZ and ADG444BRZ have typical turn-on and turn-off times of 110 ns and 60 ns respectively at ±15 V. Charge injection is typically 5 pC, making them suitable for sample-and-hold and precision signal routing applications.
Can the ADG442BRZ and ADG444BRZ be used as direct replacements for each other in an existing design?
Not directly. Although they share the same package and pinout, the ADG442BRZ provides normally open switches with active-high control, while the ADG444BRZ provides normally closed switches with active-low control. A direct substitution would invert the default signal path state and control logic, so the design's control firmware and fail-safe behavior must be revalidated.
What are the leakage current and off-isolation characteristics of these switches?
The Analog Devices datasheet specifies typical off leakage current of 0.1 nA and on leakage current of 0.1 nA at ±15 V and 25 °C for both the ADG442BRZ and ADG444BRZ. Off isolation is typically −70 dB at 1 MHz, and crosstalk is typically −90 dB at 1 MHz.
What is the operating temperature range and package for the ADG442BRZ and ADG444BRZ?
Both devices are specified for the commercial temperature range of −40 °C to +85 °C and are supplied in a 16-lead SOIC package (R-16 suffix). The "BRZ" suffix indicates the RoHS-compliant SOIC package option from Analog Devices.