Part A
AD8331ARQZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3550 PCS
- Package
- QSOP-20
- Series
- Amplificateur linéaire - spécial
Replacement verdict
Compatible functional replacement candidate
The AD8331ARQZ-R7 and AD8331ARQZ are functionally identical devices from the same manufacturer, differing only in packaging format (tape-and-reel versus tube). Both share the same die, electrical specifications, and package footprint, making them interchangeable for design and production purposes. The only practical consideration is inventory packaging preference and moisture sensitivity handling during assembly.
Function and Electrical Specifications
High match
Package Type and Footprint
High match
Operating Temperature Range
High match
Packaging Format and Assembly Handling
Validation required
Parts at a glance
Part B
AD8331ARQZ-R7
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6612 PCS
- Package
- QSOP-20
- Series
- Amplificateur linéaire - spécial
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8331ARQZ-R7 | AD8331ARQZ | Why it matters |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Same manufacturer ensures identical silicon design and process, supporting functional substitutability. |
| Function / Product Type | Ultrasound variable gain amplifier (VGA) with LNA and VGA | Ultrasound variable gain amplifier (VGA) with LNA and VGA | Identical core function confirms the parts serve the same signal-chain role. |
| Package / Case | 20-Lead QSOP | 20-Lead QSOP | Same package and pinout allow drop-in board replacement without layout changes. |
| Mounting Type | Surface Mount | Surface Mount | Matching mounting style is required for physical compatibility on the PCB. |
| Supply Voltage Range | 4.5 V to 5.5 V (single supply) | 4.5 V to 5.5 V (single supply) | Identical supply requirements ensure the part operates correctly in the same circuit rails. |
| Number of Channels | 1 | 1 | Same channel count preserves signal-path architecture and board resource allocation. |
| Packaging / Ordering Format | Tape & Reel (R7 suffix, 7-inch reel) | Tube / Tray (bulk) | Different packaging affects assembly-line handling and inventory form, though the device itself is identical. |
| Moisture Sensitivity Level (MSL) | MSL 1 (unlimited floor life) | MSL 1 (unlimited floor life) | MSL governs handling and bake requirements; identical MSL simplifies storage and reflow processes. |
| RoHS Compliance | RoHS compliant | RoHS compliant | Both meeting RoHS ensures regulatory and environmental compliance for the same design. |
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 | AD8331ARQZ | AD8331ARQZ-R7 |
|---|---|---|
| Series | X-AMP® | X-AMP® |
| Part Status | Active | Active |
| Type | Variable Gain Amplifier | Variable Gain Amplifier |
| Applications | Signal Processing | Signal Processing |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between AD8331ARQZ-R7 and AD8331ARQZ?
Both parts are the same AD8331 ultralow noise, variable gain amplifier (VGA) in a 20-lead QSOP package. The suffix difference is packaging: AD8331ARQZ-R7 denotes tape-and-reel packaging (7-inch reel, 500 units per reel), while AD8331ARQZ is the standard tube or tray packaging option. The electrical die and performance specifications are identical.
Are AD8331ARQZ-R7 and AD8331ARQZ electrically and functionally interchangeable?
Yes. Both variants share the same AD8331 silicon, the same 20-lead QSOP (RQ-20) package, and the same pinout and electrical specifications. The only difference is the shipping/packaging format, so they are interchangeable in a given design provided the board accepts the QSOP-20 footprint.
What are the key specifications of the AD8331?
The AD8331 is a single-channel, ultralow noise VGA with a low noise preamplifier (LNA) and a programmable gain range of -4.5 dB to +43.5 dB, an LNA gain of 19 dB, and a -3 dB bandwidth of 120 MHz. It operates from a single 5 V supply and is specified for the -40°C to +85°C industrial temperature range.
What package does the AD8331ARQZ use, and is it RoHS compliant?
The AD8331ARQZ and AD8331ARQZ-R7 are supplied in a 20-lead QSOP (RQ-20) package. The "Z" suffix in the part number indicates RoHS-compliant, lead-free construction per Analog Devices' ordering nomenclature.
How many units are on a reel for AD8331ARQZ-R7?
The AD8331ARQZ-R7 is supplied in 7-inch tape-and-reel format with 500 units per reel, per Analog Devices' standard reel packaging for this part number.
Can AD8331ARQZ-R7 and AD8331ARQZ be used in automated pick-and-place assembly?
Yes. Both are surface-mount QSOP-20 devices. The -R7 tape-and-reel variant is specifically intended for automated pick-and-place production lines, while the standard AD8331ARQZ tube/tray format is typically used for prototyping or low-volume assembly.
Do both variants share the same operating temperature range and supply requirements?
Yes. Since both are the same AD8331 device, they share identical operating conditions: a single 5 V supply and a specified operating temperature range of -40°C to +85°C.