Part A
ADG739BRUZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1852 PCS
- Package
- TSSOP-16
- Series
- Interface - Analog Switches, Multiplexers, Demultiplexers
Replacement verdict
Compatible functional replacement candidate
The ADG739BRUZ and ADG733BRU are both dual 4:1 CMOS analog multiplexers in TSSOP-16 packages with comparable on-resistance and supply ranges, making them strong functional replacement candidates. The ADG739BRUZ offers a lower on-resistance and faster switching, while the ADG733BRU provides a wider specified operating temperature range; designers should validate timing margins and thermal requirements before substituting.
Channel Configuration
High match
Package Type
High match
On-Resistance
Validation required
Operating Temperature Range
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 | ADG739BRUZ | ADG733BRU | Why it matters |
|---|---|---|---|
| Switch Configuration | 4PST (4 independent SPST switches) | SPDT (triple 2:1 multiplexer/demultiplexer) | The switch topology determines the signal routing function; a 4PST cannot directly replace a triple SPDT in multiplexing applications. |
| Number of Channels | 4 | 3 | Channel count affects how many independent signals can be switched, impacting board layout and circuit architecture. |
| On-Resistance (RON) | 4.5 Ω (typ) | 2.5 Ω (typ) | Lower on-resistance reduces signal attenuation and voltage drop, which is critical for precision analog signal paths. |
| On-Resistance Matching (ΔRON) | 0.4 Ω (typ) | 0.4 Ω (typ) | Matching between channels affects differential signal integrity and gain consistency across switched paths. |
| Supply Voltage Range | 1.8 V to 5.5 V single supply | 1.8 V to 5.5 V single supply | Compatible supply range allows both parts to operate in the same low-voltage systems without level shifting. |
| Switching Time (tON/tOFF) | 14 ns / 8 ns (typ) | 14 ns / 8 ns (typ) | Fast switching times support high-speed signal routing and multiplexing in data acquisition systems. |
| Package | 16-lead TSSOP | 16-lead TSSOP | Identical package and pin count simplify PCB footprint reuse, though pinout functions differ. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature ratings ensure both parts suit the same industrial and commercial environments. |
| Charge Injection | 3 pC (typ) | 3 pC (typ) | Low charge injection minimizes glitches on switched analog signals, important for sample-and-hold and ADC front ends. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADG739BRUZ | ADG733BRU |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Switch Circuit | SP4T | SPDT |
| Multiplexer / Demultiplexer Circuit | 4:1 | 2:1 |
| Number of Circuits | 2 | 3 |
| On - State Resistance(Max) | 4.5Ohm | 4.5Ohm |
| Voltage - Supply, Single (V+) | 2.7V ~ 5.5V | 1.8V ~ 5.5V |
| Voltage - Supply, Dual (V±) | - | ±2.5V |
| Switch Time(Ton Toff)(Max) | 20ns, 10ns (Typ) | 21ns, 10ns (Typ) |
| -3 dB Bandwidth | 100MHz | 200MHz |
| Charge Injection | 3pC | 5pC |
| Channel Capacitance(CS(off)CD(off)) | 13pF, 42pF | 11pF |
| Current - Leakage(IS(off))(Max) | 100pA | 100pA |
| Crosstalk | -75dB @ 1MHz | -67dB @ 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 ADG739BRUZ and the ADG733BRU?
The ADG739BRUZ is a dual 4:1 multiplexer/demultiplexer, while the ADG733BRU is a triple SPDT (single-pole double-throw) switch. Both are CMOS analog switches from Analog Devices, but they differ in switch configuration, channel count, and control logic, so they are not functionally interchangeable.
Do the ADG739BRUZ and ADG733BRU use the same package and pinout?
Both devices are offered in a 16-lead TSSOP (RU suffix), but their pin functions differ because the ADG739BRUZ is a dual 4:1 mux/demux and the ADG733BRU is a triple SPDT switch. The pinouts are not identical, so PCB layouts must be verified against each device's datasheet before substitution.
What are the supply voltage ranges for the ADG739BRUZ and ADG733BRU?
Both the ADG739BRUZ and ADG733BRU are specified for dual-supply operation of ±2.5 V to ±5.5 V and single-supply operation of 2.7 V to 5.5 V, per Analog Devices datasheets. Designs should confirm the exact supply range against the latest revision of each datasheet.
How do the on-resistance specifications compare between the ADG739BRUZ and ADG733BRU?
Both devices are low on-resistance analog switches from the same Analog Devices family, with typical on-resistance in the low-ohm range at ±5 V dual supply. Exact RON values, flatness, and matching should be taken from the respective datasheets, as they are specified per device and per supply condition.
Can the ADG739BRUZ be used as a drop-in replacement for the ADG733BRU?
No. The ADG739BRUZ is a dual 4:1 multiplexer/demultiplexer, whereas the ADG733BRU is a triple SPDT switch. Their channel configurations, control inputs, and pin functions differ, so a direct drop-in replacement is not possible without redesigning the signal routing and control logic.
What control logic do the ADG739BRUZ and ADG733BRU use?
Both devices use standard CMOS/TTL-compatible logic inputs. The ADG739BRUZ uses 2-bit binary address inputs (A0, A1) plus an enable to select one of four channels per multiplexer, while the ADG733BRU uses individual logic inputs (IN1, IN2, IN3) to control each SPDT switch independently. Refer to the datasheets for exact logic thresholds.
Are the ADG739BRUZ and ADG733BRU suitable for the same applications?
They serve different switching topologies. The ADG739BRUZ is suited to signal routing and multiplexing applications requiring 4:1 selection, while the ADG733BRU is suited to SPDT routing such as signal selection between two sources. Application suitability depends on the required switch configuration, channel count, and signal conditions.
What are the operating temperature ranges for the ADG739BRUZ and ADG733BRU?
Both devices are specified for the industrial temperature range of −40 °C to +85 °C, consistent with the Analog Devices B-grade specifications. Designers should verify the exact temperature grade against the current datasheet for each part number.