Part A
ADG731BSUZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4006 PCS
- Package
- TQFP-48
- Series
- Interface - Analog Switches, Multiplexers, Demultiplexers
Replacement verdict
Compatible functional replacement candidate
The ADG732BSUZ and ADG731BSUZ are functionally compatible CMOS analog multiplexers from the same family, sharing identical package, supply, and interface characteristics. The ADG732BSUZ provides a 32:1 single-ended configuration while the ADG731BSUZ provides a 16:1 differential configuration, so the primary distinction is channel topology rather than electrical compatibility. Designers should confirm the required channel configuration before substituting one for the other.
Channel Configuration
Validation required
Package Type
High match
Supply Voltage Range
High match
Control Interface
High match
Parts at a glance
Part B
ADG732BSUZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2381 PCS
- Package
- TQFP-48
- Series
- Interface - Analog Switches, Multiplexers, Demultiplexers
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADG732BSUZ | ADG731BSUZ | Why it matters |
|---|---|---|---|
| Number of Channels | 32:1 (single-ended) | 32:1 (single-ended) | Both are 32-to-1 multiplexers, so channel count is identical; this confirms functional equivalence at the switching topology level. |
| Switch Configuration | 32:1 Multiplexer | 32:1 Multiplexer | Identical multiplexer configuration means both route one of 32 inputs to a common output, supporting direct substitution in signal-routing designs. |
| On-Resistance (RON) | 4 Ω (typical) | 4 Ω (typical) | Low and matched on-resistance minimizes signal attenuation and distortion; equal RON supports interchangeable use in precision analog paths. |
| Supply Voltage Range | 2.7 V to 5.5 V (dual ±2.5 V) | 2.7 V to 5.5 V (dual ±2.5 V) | Matching supply ranges ensure both parts operate in the same system rails, a key requirement for drop-in replacement. |
| Control Interface | Parallel (5-bit binary address) | SPI-compatible serial interface | This is the primary functional difference: the ADG732 uses parallel addressing while the ADG731 uses a serial interface, affecting pinout and microcontroller I/O requirements. |
| Package | 48-lead TQFP (SUZ) | 48-lead TQFP (SUZ) | Identical package and footprint allow either device to be placed on the same PCB pad layout. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Same industrial temperature range ensures both parts meet the same environmental requirements in the target application. |
| Channel-to-Channel Matching | 0.5 Ω (typical) | 0.5 Ω (typical) | Tight matching reduces gain error between channels; equal matching performance supports consistent signal integrity across both parts. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADG731BSUZ | ADG732BSUZ |
|---|---|---|
| Part Status | Active | Active |
| Multiplexer / Demultiplexer Circuit | 32:1 | 32:1 |
| Number of Circuits | 1 | 1 |
| On - State Resistance(Max) | 5.5Ohm | 5.5Ohm |
| Voltage - Supply, Single (V+) | 1.8V ~ 5.5V | 1.8V ~ 5.5V |
| Voltage - Supply, Dual (V±) | ±2.5V | ±2.5V |
| -3 dB Bandwidth | 18MHz | 18MHz |
| Charge Injection | 1pC | 1pC |
| Channel Capacitance(CS(off)CD(off)) | 13pF, 260pF | 13pF, 275pF |
| Current - Leakage(IS(off))(Max) | 250pA | 250pA |
| Crosstalk | -72dB @ 1MHz | -72dB @ 1MHz |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the ADG732BSUZ and ADG731BSUZ?
The ADG732BSUZ is a 32-channel (dual 16-to-1) multiplexer, while the ADG731BSUZ is a 32-to-1 single multiplexer. Both are in a 48-lead TQFP package and share the same pinout family, but the ADG732 provides two independent 16:1 mux sections with separate enable controls, whereas the ADG731 provides a single 32:1 mux.
Are the ADG732BSUZ and ADG731BSUZ pin-compatible?
No. Although both devices are offered in the same 48-lead TQFP (SUZ) package, their pin functions differ because the ADG732 is a dual 16-to-1 mux and the ADG731 is a single 32-to-1 mux. The channel addressing and enable pin assignments are not identical, so they are not direct drop-in replacements.
What is the on-resistance of these multiplexers?
Both the ADG732BSUZ and ADG731BSUZ feature a typical on-resistance of approximately 4 Ω (with a specified maximum around 5.5 Ω at 25°C) when operated with dual supplies of ±15 V. On-resistance varies with supply voltage and signal level, so the datasheet curves should be consulted for the specific operating conditions.
What supply voltages do the ADG732BSUZ and ADG731BSUZ support?
Both devices operate from dual supplies of ±5 V to ±16.5 V, or from a single supply of 5 V to 16.5 V. They also feature a separate logic supply (VL) pin that allows the digital control inputs to interface with lower-voltage logic levels independent of the analog supply.
What is the switching time of the ADG732BSUZ and ADG731BSUZ?
Both multiplexers have typical transition times of about 25 ns and typical break-before-make switching delays of approximately 5 ns (tOPEN) when operated with ±15 V dual supplies. These fast switching characteristics make them suitable for high-speed signal routing applications.
Do the ADG732BSUZ and ADG731BSUZ support daisy-chaining for expanding channel count?
Yes. Both devices include a daisy-chain feature via the DB (daisy-chain) pin, allowing multiple multiplexers to be cascaded to expand the number of channels without additional control lines. This is useful for building larger switch arrays in automated test equipment and data acquisition systems.
What are the typical applications for the ADG732BSUZ versus the ADG731BSUZ?
The ADG732BSUZ (dual 16-to-1) is suited for differential signal routing or applications requiring two independent multiplexer banks, such as medical instrumentation and communication systems. The ADG731BSUZ (32-to-1) is suited for single-ended high-channel-count signal routing, such as data acquisition systems and automated test equipment where a single large mux is preferred.