Part A
AD9225ARS
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7539 Stückzahl
- Package
- SSOP-28
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
The AD9225ARS and AD9220AR-REEL are both 12-bit analog-to-digital converters, but they differ in sampling rate, package type, and power consumption, so they are not direct drop-in substitutes. The AD9225ARS offers a higher sampling rate in an SSOP-28 package, while the AD9220AR-REEL provides a lower sampling rate in a SOIC-28 package. Designers must verify timing, power budget, and board layout before considering either part as a replacement for the other.
Different sampling rate
Different package type
Different power consumption
Different pin configuration
Parts at a glance
Part B
AD9220AR-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6804 Stückzahl
- Package
- SOIC-28
- Series
- Datenerfassung mit Analog to Digital Converters (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 | AD9225ARS | AD9220AR-REEL | Why it matters |
|---|---|---|---|
| Resolution | 12 bits | 12 bits | Both are 12-bit ADCs, so digital resolution and code width are equivalent for system design. |
| Sampling Rate | 25 MSPS | 10 MSPS | Maximum conversion rate determines the highest input signal bandwidth the ADC can digitize; the AD9225 supports 2.5x faster sampling. |
| Input Type | Differential | Single-ended | Differential inputs offer better common-mode rejection and noise immunity, while single-ended inputs simplify front-end drive circuitry. |
| Package / Case | 28-SSOP | 28-SOIC | Footprint and PCB layout differ between SSOP and SOIC, affecting board redesign and assembly compatibility. |
| Supply Voltage | 5 V (single supply) | 5 V (single supply) | Both operate from a single 5 V rail, so power supply architecture is compatible between the two parts. |
| Power Consumption | ~280 mW | ~100 mW | Lower power dissipation reduces thermal load and suits battery or thermally constrained designs; the AD9220 is significantly more efficient. |
| SNR (Signal-to-Noise Ratio) | ~71 dB | ~70 dB | SNR indicates achievable dynamic range; similar values mean comparable noise performance for both converters. |
| Output Interface | Parallel CMOS | Parallel CMOS | Identical parallel CMOS output simplifies digital interface and FPGA/controller connection compatibility. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Matching industrial temperature ranges ensure both parts suit the same environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9225ARS | AD9220AR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 25M | 10M |
| 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 | 2.7V ~ 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-REEL?
The AD9225ARS is a 12-bit, 25 MSPS analog-to-digital converter in a 28-lead SSOP package, while the AD9220AR-REEL is a 12-bit, 10 MSPS ADC in a 28-lead SOIC package supplied on tape and reel. The AD9225 offers a higher maximum sampling rate, whereas the AD9220 trades sample rate for a different package and packaging format.
Do the AD9225ARS and AD9220AR-REEL have the same resolution and input architecture?
Yes. Both devices are 12-bit monolithic ADCs with a pipelined switched-capacitor architecture and a differential input, and both are specified for a 2 V peak-to-peak differential input span. They differ primarily in maximum sample rate and package.
Can the AD9225ARS and AD9220AR-REEL be used interchangeably in an existing design?
Not directly. Although both are 12-bit pipelined ADCs, the AD9225ARS is rated to 25 MSPS and the AD9220AR-REEL to 10 MSPS, and they use different packages (28-lead SSOP versus 28-lead SOIC). Pin functions and PCB land patterns must be verified against the respective datasheets before any substitution.
What are the maximum sampling rates of the AD9225ARS and AD9220AR-REEL?
The AD9225ARS has a maximum sampling rate of 25 MSPS. The AD9220AR-REEL has a maximum sampling rate of 10 MSPS. Designs requiring sample rates above 10 MSPS must use the AD9225ARS or another device rated for the required rate.
What packages and packaging formats do these two parts use?
The AD9225ARS is supplied in a 28-lead SSOP package. The AD9220AR-REEL is supplied in a 28-lead SOIC package in tape-and-reel format, which is intended for automated pick-and-place assembly. The different package footprints mean the PCB land patterns are not identical.
Do both parts operate from the same supply voltage?
Both the AD9225ARS and AD9220AR-REEL are specified for a single 5 V analog supply with a separate digital supply, consistent with the Analog Devices AD922x family. Designers should confirm the exact supply and reference requirements in each device's datasheet before finalizing a design.
Which part should be selected for a lower-speed, space-constrained design?
Selection depends on the required sample rate and PCB footprint. The AD9220AR-REEL is limited to 10 MSPS and uses a 28-lead SOIC package, while the AD9225ARS supports up to 25 MSPS in a 28-lead SSOP package. The package footprint and thermal/assembly requirements should be matched to the board layout before choosing.