Part A
ADG723BRMZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 6121 個数
- Package
- MSOP-8
- 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 ADG723BRMZ and ADG721BRM are both dual SPST CMOS analog switches from Analog Devices in the same MSOP-8 package, sharing identical supply range, on-resistance class, and digital control interface. The ADG723BRMZ offers a normally closed (NC) switch configuration versus the normally open (NO) configuration of the ADG721BRM, so the two are functionally interchangeable only when the switch logic state is accounted for in the target design. Verify the required switch polarity and leakage budget before substituting.
Switch Configuration
High match
Package Type
High match
On-Resistance
High match
Switch Logic Polarity
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 | ADG723BRMZ | ADG721BRM | Why it matters |
|---|---|---|---|
| Switch Configuration | SPST (Normally Open) x2 | SPST (Normally Open) x2 | Both are dual SPST normally-open switches, so the switching function is equivalent for signal routing. |
| Number of Channels | 2 | 2 | Channel count must match to preserve circuit topology when substituting parts. |
| On-Resistance (RON) | 4 Ω (typ) | 4 Ω (typ) | On-resistance affects signal attenuation and voltage drop; matching values preserve analog signal integrity. |
| Supply Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | The supply range determines compatibility with the system power rail and logic levels. |
| Package / Mounting | 8-Lead MSOP (Surface Mount) | 8-Lead MSOP (Surface Mount) | Package and footprint must match for physical board compatibility and drop-in replacement. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range must cover the application environment for reliable operation. |
| Switching Time (tON/tOFF) | tON 14 ns / tOFF 6 ns (typ) | tON 14 ns / tOFF 6 ns (typ) | Switching speed affects timing accuracy in multiplexing and signal-gating applications. |
| Logic Control Interface | CMOS/TTL compatible | CMOS/TTL compatible | Control logic compatibility ensures the switch can be driven directly by standard digital outputs. |
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 | ADG723BRMZ | ADG721BRM |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Switch Circuit | SPST - NO/NC | SPST - NO |
| Multiplexer / Demultiplexer Circuit | 1:1 | 1:1 |
| Number of Circuits | 2 | 2 |
| On - State Resistance(Max) | 4Ohm | 4Ohm |
| Channel - to - Channel Matching(ΔRon) | 300mOhm | 300mOhm |
| Voltage - Supply, Single (V+) | 1.8V ~ 5.5V | 1.8V ~ 5.5V |
| Switch Time(Ton Toff)(Max) | 14ns, 6ns (Typ) | 14ns, 6ns (Typ) |
| -3 dB Bandwidth | 200MHz | 200MHz |
| Charge Injection | 2pC | 2pC |
| Channel Capacitance(CS(off)CD(off)) | 7pF, 7pF | 7pF, 7pF |
| Current - Leakage(IS(off))(Max) | 250pA | 250pA |
| Crosstalk | -97dB @ 1MHz | -97dB @ 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 ADG723BRMZ and the ADG721BRM?
The ADG723BRMZ is a dual SPST switch with normally open (NO) contacts, while the ADG721BRM is a dual SPST switch with normally closed (NC) contacts. Both are single-supply CMOS analog switches in 8-lead MSOP packages, but their default switch states differ: the ADG723BRMZ is open when the control logic is low, and the ADG721BRM is closed when the control logic is low.
Are the ADG723BRMZ and ADG721BRM pin-compatible?
Yes. Both devices are offered in the same 8-lead MSOP (RM) package with the same pinout, so they are pin-compatible. However, because their switch logic states are complementary, the control signal polarity required for a given switch state differs between the two parts.
What is the on-resistance of the ADG723BRMZ and ADG721BRM?
Both the ADG723BRMZ and ADG721BRM are specified with an on-resistance of typically 4 Ω (maximum 8 Ω) at a single +5 V supply, per the Analog Devices datasheet. On-resistance varies with supply voltage and signal level, so the datasheet curves should be consulted for operation at other supply voltages.
What supply voltage range do the ADG723BRMZ and ADG721BRM support?
Both devices operate from a single supply of +2.7 V to +5.5 V, making them suitable for 3 V and 5 V systems. They are CMOS analog switches and are not specified for dual-supply (bipolar) operation.
Can the ADG723BRMZ and ADG721BRM be used as direct substitutes for each other?
They can be substituted only if the control logic polarity is adjusted, because the ADG723BRMZ is normally open and the ADG721BRM is normally closed. The pinout and package are the same, but the default switch state with a low control input is opposite, so the driving logic or firmware must be verified before replacement.
What are the switching times of the ADG723BRMZ and ADG721BRM?
Per the Analog Devices datasheet, both the ADG723BRMZ and ADG721BRM have typical turn-on and turn-off times in the range of tens of nanoseconds (approximately 10–20 ns typical) at a +5 V supply. Exact values depend on supply voltage and load conditions and should be taken from the datasheet specifications.
What is the difference in leakage current between the ADG723BRMZ and ADG721BRM?
Both devices are specified with low leakage currents, typically in the sub-nanoampere to low-nanoampere range at room temperature, per the Analog Devices datasheet. Leakage increases with temperature, and the datasheet provides the specified limits over the operating temperature range for each part.
Are the ADG723BRMZ and ADG721BRM suitable for audio signal switching?
Both are general-purpose CMOS analog switches with low on-resistance and fast switching, and they can pass analog signals within their supply rails. However, they are not specifically characterized as audio switches, so for audio applications the datasheet's distortion, charge injection, and off-isolation specifications should be evaluated against the design requirements.