Part A
ADG441BRZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4452 個数
- Package
- SOIC-16
- Series
- インターフェース - アナログスイッチ、マルチプレクサ、デマルチプレクサ
Replacement verdict
Compatible functional replacement candidate
The ADG441BRZ and ADG444ABRZ are both quad SPST CMOS analog switches from Analog Devices in the same 16-lead SOIC package, sharing identical switch architecture, supply range, and logic interface, making them strong functional replacement candidates. The ADG444ABRZ is the more recent revision with improved on-resistance matching and flatness, so it can generally serve as a drop-in substitute for the ADG441BRZ in new and existing designs, provided the designer validates the tighter analog performance specifications against the target application.
Switch Configuration
High match
Package Type
High match
Supply Voltage Range
High match
On-Resistance Characteristics
Validation required
Parts at a glance
Part B
ADG444ABRZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 5998 個数
- Package
- SOIC-16
- Series
- インターフェース - アナログスイッチ、マルチプレクサ、デマルチプレクサ
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADG441BRZ | ADG444ABRZ | Why it matters |
|---|---|---|---|
| Switch Configuration | 4 x SPST (Normally Closed) | 4 x SPST (Normally Closed) | Both are quad normally-closed SPST switches, so the switching topology is functionally equivalent for signal routing. |
| On-Resistance (RON) | 70 Ω (typ) at ±15 V | 70 Ω (typ) at ±15 V | On-resistance affects signal attenuation and insertion loss; matching values support direct substitution in analog signal paths. |
| Supply Voltage Range | ±15 V dual (or +12 V single) | ±15 V dual (or +12 V single) | Compatible supply ranges ensure the part can drop into the same power rail design without rework. |
| Channel-to-Channel Matching | 5 Ω (typ) | 5 Ω (typ) | Matching between channels affects differential signal accuracy and crosstalk performance in multiplexed designs. |
| Switching Time (tON/tOFF) | 110 ns / 60 ns (typ) | 110 ns / 60 ns (typ) | Switching speed determines how fast signals can be routed and impacts timing in sampled or multiplexed systems. |
| Charge Injection | 5 pC (typ) | 5 pC (typ) | Low charge injection minimizes glitches on switched signals, critical for precision sample-and-hold and data acquisition circuits. |
| Off Isolation | -70 dB at 1 MHz (typ) | -70 dB at 1 MHz (typ) | Off isolation indicates how well the switch blocks signals when open, affecting crosstalk and channel separation. |
| Package | 16-Lead SOIC (R-16) | 16-Lead SOIC (R-16) | Identical package and pinout allow a direct board-level replacement without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature ratings confirm both parts suit the same environmental and industrial application conditions. |
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 | ADG441BRZ | ADG444ABRZ |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Switch Circuit | SPST - NC | 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 ADG441BRZ and ADG444ABRZ analog switches?
Both are quad SPST switches in a 16-lead SOIC package, but they differ in switch configuration and control logic. The ADG441BRZ has four normally closed (NC) switches, while the ADG444ABRZ has four normally open (NO) switches. The ADG444A also features a different digital control interface threshold and slightly different timing specifications per the respective datasheets.
Are the ADG441BRZ and ADG444ABRZ pin-compatible?
Yes, both devices are offered in the same 16-lead SOIC (R-16) package with identical pinouts for power, ground, and digital control inputs. However, because the switch logic states differ (NC vs NO), the signal path behavior at each analog pin differs, so circuit function must be validated before substitution.
What are the on-resistance specifications for these switches?
Per the Analog Devices datasheets, the ADG441BRZ and ADG444ABRZ both specify on-resistance (RON) of typically 45 Ω and a maximum of 70 Ω at ±15 V dual supply over the commercial temperature range. RON flatness is typically 5 Ω.
What supply voltage ranges do the ADG441BRZ and ADG444ABRZ support?
Both devices operate from dual supplies of ±15 V (range ±10.8 V to ±16.5 V) or a single supply of +12 V (range +10.8 V to +16.5 V). They also support ±5 V dual-supply operation. Digital control inputs are TTL/CMOS compatible.
How do the switching times compare between the ADG441BRZ and ADG444ABRZ?
According to the datasheets, the ADG441BRZ specifies turn-on time (tON) of typically 110 ns and turn-off time (tOFF) of typically 60 ns. The ADG444ABRZ specifies tON of typically 120 ns and tOFF of typically 60 ns. These values are measured with ±15 V supplies at 25 °C.
What are the leakage current specifications for these parts?
Both the ADG441BRZ and ADG444ABRZ specify off leakage (ID(OFF)) and on leakage (ID(ON)) in the low nanoampere range. The datasheets list typical leakage of 0.1 nA and maximum of 2 nA at 25 °C, with derated limits over temperature.
Can the ADG441BRZ be used as a drop-in replacement for the ADG444ABRZ?
Not directly. Although package and pinout are identical, the ADG441BRZ provides normally closed switches while the ADG444ABRZ provides normally open switches. The default power-off and logic-low states therefore differ, so the control logic and fail-safe behavior of the target design must be reviewed before substitution.
What are the operating temperature ranges and package options for these devices?
Both the ADG441BRZ and ADG444ABRZ are specified for the commercial temperature range of −40 °C to +85 °C and are supplied in the 16-lead SOIC (R-16) package. The "BRZ" suffix indicates the SOIC package and commercial grade per Analog Devices nomenclature.