Part A
AD7730BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7421 PCS
- Package
- TSSOP-24
- Series
- Acquisição de dados - Front End analógico (AFE)
Replacement verdict
Compatible functional replacement candidate
The AD7730LBRU is a functionally compatible replacement candidate for the AD7730BRUZ, sharing the same 24-bit sigma-delta ADC architecture, TSSOP-24 footprint, and signal chain topology. Designers should validate the extended temperature range and confirm supply and interface timing against the target application before qualifying the L-grade device as a drop-in substitute.
Resolution and ADC Architecture
High match
Package and Pinout
High match
Operating Temperature Range
Validation required
Supply Voltage and Interface
Validation required
Parts at a glance
Part B
AD7730LBRU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6248 PCS
- Package
- TSSOP-24
- Series
- Acquisição de dados - Front End analógico (AFE)
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 | AD7730LBRU | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit sigma-delta ADCs, so resolution is identical and not a differentiator for substitutability. |
| Number of ADC channels | 2 (differential) | 2 (differential) | Channel count determines how many signal inputs can be handled; identical here, so both fit the same input topology. |
| Interface type | Serial (SPI-compatible, 3-wire) | Serial (SPI-compatible, 3-wire) | The digital interface must match the host microcontroller; both use the same serial interface, easing drop-in replacement. |
| Supply voltage (analog) | 5 V | 5 V | Analog supply compatibility ensures the same signal range and reference biasing; identical values mean no redesign needed. |
| Package / mounting | 24-TSSOP (RU-24) | 24-TSSOP (RU-24) | Package and footprint must match for board-level interchangeability; both share the same TSSOP footprint. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +105 °C | The LBRU variant offers a wider temperature range, which matters for industrial or harsh-environment applications where the BRUZ may be marginal. |
| Maximum output data rate | Up to 1.2 kSPS (per datasheet) | Up to 1.2 kSPS (per datasheet) | Data rate affects throughput for weighing and sensor applications; both share the same rate, so throughput is not a differentiator. |
| Part number suffix / grade | B grade, RoHS-compliant (Z suffix) | L grade (extended temperature) | The suffix indicates grade and compliance differences; the Z denotes RoHS compliance while the L denotes the extended-temperature grade, affecting sourcing and environmental compliance. |
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 | AD7730LBRU |
|---|---|---|
| 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 are the key differences between the AD7730BRUZ and the AD7730LBRU?
Both are functionally identical signal-conditioning ADCs from Analog Devices in a 24-lead TSSOP package. The primary difference is the specified performance grade: the AD7730BRUZ is specified over the standard industrial temperature range, while the AD7730LBRU is the lower-power variant with a reduced supply current specification. Designers should confirm the exact grade-specific limits in the respective datasheets before substitution.
Are the AD7730BRUZ and AD7730LBRU pin-compatible?
Yes. Both devices are offered in the same 24-lead TSSOP (RU) package with an identical pinout, so they are pin-compatible and share the same PCB land pattern.
What is the resolution and architecture of these AD7730 devices?
Both are sigma-delta (Σ-Δ) analog-to-digital converters with a nominal 24-bit output resolution, intended for high-resolution weigh-scale and pressure-sensor signal conditioning.
Do the AD7730BRUZ and AD7730LBRU support the same interface?
Yes. Both devices provide a serial interface compatible with SPI and MICROWIRE, allowing connection to standard microcontrollers and DSPs.
Can the AD7730LBRU be used as a drop-in replacement for the AD7730BRUZ?
Because the two parts share the same package, pinout, and core function, they can be considered for substitution, but the designer must verify that the grade-specific electrical limits (supply current, temperature range, and accuracy specifications) of the AD7730LBRU meet the application requirements per the Analog Devices datasheet.
What supply voltage do the AD7730BRUZ and AD7730LBRU require?
Both devices operate from a single analog supply in the 5 V range with a separate digital supply, as defined in the Analog Devices datasheet. Refer to the datasheet for the exact minimum and maximum supply limits for each grade.
Are the AD7730BRUZ and AD7730LBRU RoHS compliant?
The "Z" suffix in AD7730BRUZ denotes a RoHS-compliant lead-free package per Analog Devices ordering conventions. The AD7730LBRU ordering code should be checked against the manufacturer's product page to confirm its RoHS status for the specific lot or revision.