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 ADG731BSUZ and ADG732BSU are functionally compatible CMOS analog multiplexers from the same ADG73x family, sharing identical switch architecture, supply requirements, and TQFP-48 footprint. The primary distinction is channel count, with the ADG731 providing 32:1 and the ADG732 providing dual 16:1 configurations. Designers should confirm that the channel configuration aligns with the intended signal routing before substituting one for the other.
Channel Configuration
High match
Package Type
High match
Supply Voltage Range
High match
On-Resistance
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 | ADG731BSUZ | ADG732BSU | Why it matters |
|---|---|---|---|
| Number of Channels | 32 | 32 | Both are 32-channel multiplexers, so channel count is functionally equivalent. |
| Switch Configuration | 32:1 Multiplexer | Dual 16:1 Multiplexer | The ADG731 is a single 32:1 mux while the ADG732 is a dual 16:1 mux; this changes how channels are addressed and routed. |
| On-Resistance (Typical) | 4 Ω | 4 Ω | Low on-resistance minimizes signal attenuation and voltage drop across the switch. |
| 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. |
| Package / Mounting | 48-TQFP (7x7) | 48-TQFP (7x7) | Identical package and footprint enables drop-in board replacement without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature ratings ensure equivalent environmental performance. |
| Control Interface | Parallel (5-bit binary address) | Parallel (4-bit binary address + A0) | Addressing scheme differs between the single 32:1 and dual 16:1 configurations, affecting control logic design. |
| Channel-to-Channel Matching | 0.4 Ω typical | 0.4 Ω typical | Good matching reduces gain error between channels in multiplexed signal paths. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADG731BSUZ | ADG732BSU |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Mounting Type | Surface Mount | Surface Mount |
| Multiplexer / Demultiplexer Circuit | 32:1 | - |
| Number of Circuits | 1 | - |
| On - State Resistance(Max) | 5.5Ohm | - |
| Voltage - Supply, Single (V+) | 1.8V ~ 5.5V | - |
| Voltage - Supply, Dual (V±) | ±2.5V | - |
| -3 dB Bandwidth | 18MHz | - |
| Charge Injection | 1pC | - |
| Channel Capacitance(CS(off)CD(off)) | 13pF, 260pF | - |
| Current - Leakage(IS(off))(Max) | 250pA | - |
| Crosstalk | -72dB @ 1MHz | - |
| Operating Temperature | -40°C ~ 85°C (TA) | - |
Frequently asked questions
What are the key differences between the ADG731BSUZ and ADG732BSU?
The ADG731BSUZ is a 32-channel multiplexer, while the ADG732BSU is a 16-channel multiplexer. Both are single-chip CMOS analog multiplexers with a 4-ohm on-resistance, but they differ in channel count and addressable configuration. The ADG731 provides 32 channels (dual 16:1 or single 32:1), whereas the ADG732 provides 16 channels (dual 8:1 or single 16:1).
Are the ADG731BSUZ and ADG732BSU pin-compatible?
No. The ADG731BSUZ and ADG732BSU are not pin-compatible because they have different channel counts and address line requirements. The ADG731 requires 5 address lines for 32 channels, while the ADG732 requires 4 address lines for 16 channels. Their pinouts and package configurations differ accordingly.
What is the on-resistance of the ADG731BSUZ and ADG732BSU?
Both the ADG731BSUZ and ADG732BSU feature a typical on-resistance of 4 ohms, with a maximum specified on-resistance of 5.5 ohms over the operating temperature range, as specified in the Analog Devices datasheet.
What supply voltage range do the ADG731BSUZ and ADG732BSU support?
Both devices operate from a dual supply of ±2.5 V to ±5.5 V or a single supply of 2.5 V to 5.5 V. They are specified for operation over the extended industrial temperature range of −40°C to +85°C.
What package types are available for the ADG731BSUZ and ADG732BSU?
The ADG731BSUZ is available in a 48-lead TQFP package, while the ADG732BSU is available in a 48-lead TQFP package as well. The "Z" suffix on the ADG731BSUZ indicates a lead-free (RoHS-compliant) package variant.
Can the ADG731BSUZ and ADG732BSU be used in daisy-chain or cascaded configurations?
Yes. Both devices support cascading through their address and enable control lines. The ADG731BSUZ, with its 32-channel capability, can be used for larger multiplexing arrays, while the ADG732BSU is suitable for smaller arrays. Both feature break-before-make switching and are controlled via standard CMOS/TTL-compatible logic inputs.
What are the typical applications for the ADG731BSUZ versus the ADG732BSU?
The ADG731BSUZ (32-channel) is typically used in high-channel-count data acquisition systems, automated test equipment, and medical instrumentation where a large number of signals must be routed to a single measurement path. The ADG732BSU (16-channel) is used in similar applications but where fewer channels are required, offering a more compact and cost-effective solution for moderate channel-count multiplexing.