Part A
AD7730BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7421 PCS
- Package
- TSSOP-24
- Series
- Data Acquisition - Analog Front End (AFE)
Replacement verdict
Compatible functional replacement candidate
The AD7730BRUZ and AD7730BRU are functionally equivalent signal conditioning ADCs sharing identical core architecture, resolution, and analog performance characteristics. The primary distinction lies in package construction and compliance status, with the AD7730BRUZ offering RoHS-compliant packaging while maintaining full pin and function compatibility. Both devices are suitable for direct substitution in precision weigh scale and pressure sensor applications, provided the specific environmental and regulatory requirements of the target design are satisfied.
Resolution and Accuracy
High match
Package Type
High match
RoHS Compliance
Validation required
Operating Temperature Range
High match
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7730BRUZ | AD7730BRU | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both parts provide 24-bit sigma-delta conversion, so measurement resolution is identical. |
| Number of ADC channels | 2 (differential) | 2 (differential) | Channel count determines how many signal inputs can be handled; both are identical here. |
| Interface type | SPI / Serial | SPI / Serial | The digital interface must match the host microcontroller; both use the same serial interface. |
| Supply voltage (analog) | 5 V | 5 V | Analog supply compatibility ensures the part fits the existing power rail design. |
| Package / case | 24-TSSOP | 24-TSSOP | Package footprint must match for board-level drop-in substitution; both are 24-TSSOP. |
| Mounting type | Surface Mount | Surface Mount | Mounting style affects assembly; both are surface mount, though the suffix denotes packaging/ordering differences. |
| RoHS compliance | RoHS compliant (lead-free) | Non-RoHS (contains lead) | The "Z" suffix indicates lead-free/RoHS compliance; this affects regulatory compliance and solder process selection. |
| Ordering / packaging suffix | Z = RoHS-compliant tube/tray | Standard (non-Z) packaging | The suffix difference reflects environmental compliance and packaging, which matters for procurement and assembly. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +85 °C | Industrial temperature range suitability is identical for both variants. |
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 | AD7730BRUZ | AD7730BRU |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 24 | 24 |
| Number of Channels | 1 | 1 |
| Power (Watts) | 125 mW | 125 mW |
| Voltage - Supply, Analog | 5V | 5V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 2.7V ~ 5.25V |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between the AD7730BRUZ and the AD7730BRU?
The AD7730BRUZ and AD7730BRU are functionally identical Analog Devices signal conditioning ADCs; the only documented difference is the package/ordering suffix. The "Z" suffix denotes RoHS-compliant lead-free construction, while the non-Z AD7730BRU is the earlier lead-containing (non-RoHS) version. Both are specified in a 24-lead TSSOP and share the same datasheet specifications.
Are the AD7730BRUZ and AD7730BRU electrically and functionally interchangeable?
Yes. Per the AD7730 datasheet, both parts are the same silicon device with identical pinout, 24-lead TSSOP package, and specified performance. The distinction is RoHS/lead-free compliance and ordering code, not electrical function, so they are interchangeable in function where RoHS status is not a constraint.
What is the resolution and architecture of the AD7730?
The AD7730 is a sigma-delta (Σ-Δ) analog-to-digital converter intended for weigh-scale and pressure-sensor applications. It provides 24-bit resolution with a programmable gain front end and is specified for high-resolution, low-frequency signal conditioning.
What package do the AD7730BRUZ and AD7730BRU use?
Both devices are supplied in a 24-lead TSSOP (thin shrink small outline package), designated by the "RU" code in the part number. The "Z" in AD7730BRUZ indicates the RoHS-compliant version of the same 24-lead TSSOP package.
Does the "Z" suffix affect the operating temperature range or specifications?
No. The "Z" suffix is an Analog Devices RoHS/lead-free ordering designator and does not change the device's specified operating temperature range or electrical performance. Both AD7730BRUZ and AD7730BRU are specified over the same industrial temperature range per the datasheet.
Which part should be selected for a new RoHS-compliant design?
The AD7730BRUZ should be selected for new designs requiring RoHS compliance, since the "Z" suffix denotes the lead-free, RoHS-compliant version. The non-Z AD7730BRU is the legacy lead-containing order code and should not be specified for new RoHS-restricted assemblies.
Can the AD7730BRUZ be used as a drop-in replacement for the AD7730BRU on an existing PCB?
Yes, from a footprint and function standpoint, because both are the same device in the same 24-lead TSSOP with identical pinout. The substitution only changes the RoHS/lead-free status of the soldered part; verify your assembly's RoHS and process requirements before substituting.