Part A
AD9225ARS
ADI公司
- Lifecycle
- Active
- Stock
- 7539 件
- Package
- SSOP-28
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Compatible functional replacement candidate
The AD9225ARS and AD9225AR are functionally equivalent 12-bit monolithic A/D converters from the same AD9225 family, sharing identical core specifications including resolution, sampling rate, input range, and supply requirements. The primary distinction lies in the package and temperature grade, with the ARS variant specified for the extended industrial temperature range in a SSOP-28 package, while the AR variant is offered in a SOIC-28 package over the standard industrial range. Both parts are suitable for high-speed data acquisition and signal processing applications, though designers should confirm package footprint compatibility and thermal margin for the target operating environment.
Resolution and Sampling Rate
High match
Analog Input Range
High match
Package Type
Validation required
Operating Temperature Range
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD9225ARS | AD9225AR | Why it matters |
|---|---|---|---|
| Package / Case | 28-SSOP (Shrink Small Outline Package) | 28-SOIC (Small Outline Integrated Circuit) | The package footprint differs, so the two parts are not drop-in board-level substitutes; PCB land patterns must match the selected package. |
| Resolution | 12 bits | 12 bits | Resolution defines the quantization granularity of the ADC; identical resolution means equivalent nominal precision. |
| Sampling Rate | 25 MSPS | 25 MSPS | Maximum sample rate determines the bandwidth of signals the converter can digitize; matching rates preserve system timing performance. |
| Input Type | Differential, single-ended | Differential, single-ended | Input configuration affects analog front-end design and achievable noise/linearity performance. |
| Supply Voltage (Analog) | 5 V | 5 V | Analog supply voltage must match the system rail; identical values allow reuse of the same power design. |
| Supply Voltage (Digital) | 3 V to 5 V | 3 V to 5 V | Digital supply range determines logic-level compatibility with downstream devices such as FPGAs or DSPs. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range defines the environments in which the part is guaranteed to meet specifications. |
| Power Consumption | 280 mW typical | 280 mW typical | Power dissipation affects thermal design and supply sizing; matching values keep the thermal budget unchanged. |
| SNR | 71 dB typical | 71 dB typical | Signal-to-noise ratio indicates achievable dynamic range; identical SNR means equivalent noise performance. |
| Output Interface | Parallel CMOS | Parallel CMOS | Output interface type determines how the converter connects to the digital host; matching interfaces simplify substitution. |
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 | AD9225AR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| 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 AD9225ARS and the AD9225AR?
The AD9225ARS and AD9225AR are both 12-bit, 25 MSPS analog-to-digital converters from Analog Devices, but they differ in package type. The AD9225ARS is supplied in a 28-lead SSOP (Shrink Small Outline Package), while the AD9225AR is supplied in a 28-lead SOIC (Small Outline Integrated Circuit) package. Both are specified over the industrial temperature range and share the same core converter specifications.
Are the AD9225ARS and AD9225AR electrically and functionally identical?
Yes. Both parts are the same AD9225 converter die with identical 12-bit resolution, 25 MSPS maximum sampling rate, and pinout function. The only documented difference is the package outline (SSOP vs SOIC), which affects the PCB land pattern and thermal/mechanical characteristics, not the converter's electrical performance specifications.
Can the AD9225ARS be used as a drop-in replacement for the AD9225AR?
No, not as a direct drop-in. Although the pin functions are the same, the SSOP (ARS) and SOIC (AR) packages have different body widths, lead pitches, and land patterns. The PCB footprint must be redesigned or a compatible footprint provided before substituting one package for the other.
What are the key specifications shared by the AD9225ARS and AD9225AR?
Both devices are 12-bit monolithic ADCs with a maximum sampling rate of 25 MSPS, a pipelined architecture, and an on-chip sample-and-hold amplifier. They operate from a single 5 V analog supply and a 3 V to 5 V digital supply, and provide a differential input with a 2 V p-p full-scale range. These parameters are common to both package options per the Analog Devices datasheet.
Which package should be selected for a new design, the AD9225ARS or the AD9225AR?
Package selection depends on PCB area and assembly requirements. The AD9225ARS (28-lead SSOP) offers a smaller footprint and is suited to space-constrained boards, while the AD9225AR (28-lead SOIC) provides a wider body and may be preferred where SOIC handling or inspection is required. Both packages meet the same datasheet electrical specifications, so the choice is mechanical rather than performance-based.
Do the AD9225ARS and AD9225AR have the same pinout?
Yes. Both the 28-lead SSOP and 28-lead SOIC versions of the AD9225 use the same pin function assignments as defined in the Analog Devices datasheet. The difference is the physical package outline and lead pitch, not the signal assignment of each pin.
Are the AD9225ARS and AD9225AR rated for the same operating temperature range?
Yes. Both the AD9225ARS and AD9225AR are specified over the industrial temperature range of -40°C to +85°C, as stated in the Analog Devices datasheet. The package difference does not change the specified operating temperature range.