Part A
AD9220AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5982 PCS
- Package
- SOIC-28
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD9220AR is a viable functional replacement candidate for the AD9225ARS in many designs, as both are 12-bit monolithic A/D converters sharing the same 28-lead SSOP footprint and 5 V analog supply. However, the AD9225ARS offers a higher 25 MSPS sampling rate versus the AD9220AR's 10 MSPS, and the two devices differ in power consumption and input bandwidth. Engineers must validate timing margins, clock jitter sensitivity, and thermal performance against the target application before committing to a drop-in substitution.
Sampling Rate
Validation required
Resolution
High match
Package Type
High match
Power Consumption
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 | AD9220AR | Why it matters |
|---|---|---|---|
| Resolution | 12 bits | 12 bits | Both converters provide 12-bit resolution, so quantization granularity is equivalent for signal-chain design. |
| Sampling Rate | 25 MSPS | 10 MSPS | Maximum sample rate determines the usable input bandwidth and whether the part meets the system's Nyquist requirements. |
| Package / Mounting | 28-Lead SSOP (surface mount) | 28-Lead SOIC (surface mount) | Different package footprints require PCB layout changes and affect board space and assembly compatibility. |
| Input Type | Differential | Single-ended | Differential inputs offer better common-mode rejection and noise immunity, while single-ended inputs simplify the analog front end. |
| Supply Voltage | 5 V (single supply) | 5 V (single supply) | Both operate from a 5 V supply, so power-rail requirements are compatible between the two parts. |
| Power Consumption | Approximately 280 mW | Approximately 100 mW | Lower power dissipation reduces thermal load and is important for power-sensitive or thermally constrained designs. |
| SNR (Signal-to-Noise Ratio) | Approximately 71 dB | Approximately 70 dB | SNR indicates the achievable dynamic range and directly affects measurement accuracy in the application. |
| Output Interface | Parallel CMOS | Parallel CMOS | Matching parallel CMOS outputs allow similar digital interfacing to FPGAs or DSPs without protocol changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings ensure both parts suit the same industrial environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9220AR | AD9225ARS |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 10M | 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 | 2.7V ~ 5.25V | 2.85V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD9225ARS and AD9220AR?
The AD9225ARS is a 12-bit, 25 MSPS analog-to-digital converter, while the AD9220AR is a 12-bit, 10 MSPS ADC. Both are monolithic pipelined ADCs from Analog Devices, but the AD9225ARS offers a higher maximum sampling rate. The AD9225ARS is supplied in a 28-lead SSOP package, whereas the AD9220AR is supplied in a 28-lead SOIC package.
Are the AD9225ARS and AD9220AR pin-compatible?
No. The AD9225ARS uses a 28-lead SSOP (RS) package, and the AD9220AR uses a 28-lead SOIC (R) package. These are different package footprints with different land patterns, so they are not drop-in pin-compatible replacements on the same PCB.
Can the AD9225ARS be used as a direct substitute for the AD9220AR?
Not as a direct drop-in substitute. Although both are 12-bit ADCs with similar architectures, they differ in package type, maximum sample rate, and potentially other timing and power specifications. Any substitution requires validation against the Analog Devices datasheets for both parts and verification against the target design requirements.
What is the maximum sampling rate of each device?
The AD9225ARS has a maximum sampling rate of 25 MSPS. The AD9220AR has a maximum sampling rate of 10 MSPS. Designs requiring sample rates above 10 MSPS cannot use the AD9220AR within its specified operating limits.
Do both parts have the same resolution and input configuration?
Both are 12-bit ADCs. According to their Analog Devices datasheets, both devices are complete monolithic ADCs featuring an on-chip sample-and-hold amplifier and voltage reference, and both accept a differential input. Designers should confirm input range, reference, and interface details against the respective datasheets before comparing them in a specific application.
What package types do the AD9225ARS and AD9220AR use?
The AD9225ARS is offered in a 28-lead SSOP package (Analog Devices package code RS). The AD9220AR is offered in a 28-lead SOIC package (Analog Devices package code R). The different package codes reflect different physical dimensions and PCB land patterns.
Which part should be selected for a higher-speed application?
For applications requiring sample rates above 10 MSPS, the AD9225ARS is the appropriate choice because it supports up to 25 MSPS. The AD9220AR is limited to 10 MSPS and should not be operated beyond that rate per its datasheet.