Part A
ADG731BSUZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4006 ПКС
- Package
- TQFP-48
- Series
- Интерфейс - аналоговые выключатели, мультиплексоры, демультиплексоры
Replacement verdict
Compatible functional replacement candidate
The ADG731BSUZ and ADG731BSU are functionally equivalent CMOS analog multiplexers sharing the same 32-channel single-ended configuration, 4.5 Ω on-resistance, and TQFP-48 footprint; the BSUZ suffix denotes RoHS-compliant lead-free packaging, making it a direct drop-in replacement for the non-compliant BSU variant in new designs.
Channel Configuration
High match
On-Resistance
High match
Package Type
High match
RoHS Compliance
Validation required
Parts at a glance
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 | ADG731BSU | Why it matters |
|---|---|---|---|
| Number of Channels | 1 (32:1 multiplexer) | 1 (32:1 multiplexer) | Defines the switching topology; both are single 32-to-1 multiplexers, so they are functionally interchangeable in the signal path. |
| On-Resistance (RON) | 4.5 Ω typical | 4.5 Ω typical | Low on-resistance minimizes signal attenuation and voltage drop; identical RON means equivalent signal integrity performance. |
| Supply Voltage Range | 2.7 V to 5.5 V single supply | 2.7 V to 5.5 V single supply | Determines compatibility with the system power rail; matching ranges ensure the parts can be dropped into the same design. |
| Package / Mounting | 48-TQFP (7x7), surface mount | 48-TQFP (7x7), surface mount | Footprint and mounting must match for physical substitutability on an existing PCB. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Confirms both parts meet the same environmental operating conditions for the target application. |
| Channel-to-Channel Matching | 0.5 Ω typical | 0.5 Ω typical | Matching affects distortion and accuracy across multiplexed channels; identical matching preserves signal fidelity. |
| Switching Time (tON/tOFF) | 70 ns / 40 ns typical | 70 ns / 40 ns typical | Determines maximum switching rate and settling behavior; equal timing means identical dynamic performance. |
| RoHS / Lead-Free Status | RoHS compliant, lead-free | Non-RoHS (contains lead) | The "Z" suffix denotes lead-free/RoHS compliance; this is the key difference affecting regulatory compliance and solder process compatibility. |
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 | ADG731BSUZ | ADG731BSU |
|---|---|---|
| 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 is the difference between ADG731BSUZ and ADG731BSU?
The ADG731BSUZ and ADG731BSU are functionally identical 32-to-1 multiplexers from Analog Devices. The suffix "Z" in ADG731BSUZ denotes a lead-free (Pb-free) package that is RoHS compliant, whereas the ADG731BSU is the older lead-containing (Pb) version. Both are specified in the same TQFP-48 package and share the same electrical specifications.
Are ADG731BSUZ and ADG731BSU pin-compatible?
Yes. Both devices are offered in the same 48-lead TQFP (thin quad flat pack) package with identical pin assignments and footprint. The only difference is the package plating/material composition (Pb-free versus leaded), so they are drop-in compatible from a PCB layout perspective.
Can ADG731BSUZ be used as a direct replacement for ADG731BSU?
Yes, in most cases. Because the two parts share the same function, package, pinout, and electrical specifications, ADG731BSUZ can directly replace ADG731BSU. The substitution is particularly appropriate where RoHS compliance is required. Designers should confirm that the Pb-free termination finish is acceptable for their assembly process.
What are the key specifications of the ADG731BSUZ/ADG731BSU?
Both are 32-channel (32-to-1) analog multiplexers with a typical on-resistance of approximately 4 Ω, operating from dual supplies of ±2.5 V to ±2.75 V or a single supply of 2.5 V to 5.5 V. They feature low power consumption, TTL/CMOS-compatible logic inputs, and are specified over the industrial temperature range of −40 °C to +85 °C in a 48-lead TQFP package.
Is ADG731BSUZ RoHS compliant while ADG731BSU is not?
Yes. The "Z" suffix designates the lead-free, RoHS-compliant version of the device. The ADG731BSU is the legacy leaded (non-RoHS) variant. For new designs or markets requiring RoHS compliance, ADG731BSUZ is the appropriate choice.
Do both parts have the same operating temperature range and package?
Yes. Both ADG731BSUZ and ADG731BSU are specified for the industrial temperature range of −40 °C to +85 °C and are supplied in the same 48-lead TQFP package. Their datasheet electrical and switching characteristics are equivalent.
Which part should be selected for a new design?
For new designs, ADG731BSUZ is generally recommended because it is the Pb-free, RoHS-compliant variant and is the actively supported ordering option. ADG731BSU should only be selected where existing inventory or legacy leaded assembly requirements dictate its use.