Part A
AD9225ARS
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7539 PCS
- Package
- SSOP-28
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD9225ARSZ is a functionally compatible replacement candidate for the AD9225ARS, as both parts share the same 12-bit resolution, 25 MSPS sampling rate, analog input architecture, and 28-lead SSOP package. The primary distinction is the RoHS-compliant lead-free construction of the AD9225ARSZ versus the lead-containing construction of the AD9225ARS, which should be validated against the target assembly's soldering process and compliance requirements before substitution.
Resolution and Sampling Rate
High match
Analog Input Architecture
High match
Package Type
High match
RoHS Compliance
Validation required
Parts at a glance
Part B
AD9225ARSZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1539 PCS
- Package
- SSOP-28
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD9225ARSZ | AD9225ARS | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both parts provide the same conversion resolution, so accuracy and quantization behavior are equivalent. |
| Sampling Rate | 25 MSPS | 25 MSPS | Identical maximum sample rate means both can handle the same input signal bandwidth and timing requirements. |
| Number of Inputs | 1 (single-ended/differential) | 1 (single-ended/differential) | Same input configuration allows either part to interface with the same analog front-end circuitry. |
| Architecture | Pipelined | Pipelined | Same ADC architecture ensures comparable latency, linearity, and dynamic performance characteristics. |
| Supply Voltage | 5 V (analog and digital) | 5 V (analog and digital) | Matching supply requirements means the same power rail design can be reused without modification. |
| Interface Type | Parallel | Parallel | Same parallel output interface ensures drop-in compatibility with the existing digital host connection. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings confirm both parts suit the same environmental conditions. |
| Package / Mounting | 28-SSOP (surface mount) | 28-SSOP (surface mount) | Same package and footprint allow direct board-level substitution without layout changes. |
| RoHS / Lead-Free Status | RoHS compliant, lead-free | Non-RoHS, contains lead | The Z suffix denotes lead-free/RoHS compliance, which affects regulatory compliance and solder process selection. |
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 | AD9225ARS | AD9225ARSZ |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 25M | 25M |
| Number of Inputs | 1 | 1 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| Data Interface | Parallel | Parallel |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | Pipelined | Pipelined |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 5V | 5V |
| Voltage - Supply, Digital | 2.85V ~ 5.25V | 2.85V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What is the difference between the AD9225ARSZ and the AD9225ARS?
The AD9225ARSZ and AD9225ARS are functionally identical 12-bit, 25 MSPS analog-to-digital converters. The primary difference is the package finish: the AD9225ARSZ is a RoHS-compliant, lead-free (Pb-free) version of the 28-lead SSOP package, while the AD9225ARS is the non-RoHS version containing lead in the package finish. The "Z" suffix in Analog Devices nomenclature denotes RoHS compliance.
Are the AD9225ARSZ and AD9225ARS pin-compatible?
Yes. Both devices are offered in the same 28-lead SSOP (Shrink Small Outline Package) with identical pin assignments and the same 5.3 mm body width. The pinout and package footprint are the same, so the two parts are interchangeable at the board level.
Can the AD9225ARSZ be used as a drop-in replacement for the AD9225ARS?
Yes, from an electrical and footprint standpoint the AD9225ARSZ is a drop-in replacement for the AD9225ARS. Both share the same 12-bit resolution, 25 MSPS maximum sampling rate, 5 V analog supply, and 3 V to 5 V digital output supply. The only practical consideration is RoHS compliance, which is generally an advantage for the Z version.
What are the key performance specifications shared by both parts?
Both the AD9225ARSZ and AD9225ARS are 12-bit monolithic ADCs with a maximum sampling rate of 25 MSPS. They feature a 5 V analog supply, a separate 3 V to 5 V digital supply, an on-chip sample-and-hold amplifier, and a differential input with a 2 V p-p full-scale range. Typical SNR is approximately 71 dB and SFDR approximately 85 dBc at 25 MSPS with a 2.5 MHz input.
Does the AD9225ARSZ meet RoHS requirements while the AD9225ARS does not?
Correct. The AD9225ARSZ is the RoHS-compliant, lead-free version, indicated by the "Z" suffix in Analog Devices part numbering. The AD9225ARS is the earlier non-RoHS version that contains lead in the package finish. Designs requiring RoHS compliance should specify the AD9225ARSZ.
Are both parts still available, or is one obsolete?
The AD9225ARSZ is the currently recommended and active RoHS-compliant ordering option. The AD9225ARS (non-Z) is the legacy non-RoHS version and is generally not recommended for new designs. Designers should verify current lifecycle status and availability with authorized distributors such as DigiKey, Mouser, or Analog Devices before ordering.
Do both parts require the same external components and reference circuitry?
Yes. Because the AD9225ARSZ and AD9225ARS are functionally identical, they use the same external reference, clock, input drive, and decoupling circuitry. The internal reference, clock input, and analog input architecture are unchanged between the two versions, so an existing AD9225ARS design can use the AD9225ARSZ without circuit modification.