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 AD9225ARS and AD9220ARS-REEL are both 12-bit monolithic A/D converters from Analog Devices in a 28-lead SSOP package, sharing the same pinout and supply architecture, which makes them strong functional replacement candidates. However, they differ in maximum sampling rate and power consumption, so the AD9220ARS-REEL can substitute for the AD9225ARS only where the lower 10 MSPS throughput and reduced power envelope are acceptable; designers should validate timing margin and dynamic performance for their specific signal chain before committing to the swap.
Resolution and Architecture
High match
Maximum Sampling Rate
Validation required
Package and Pinout
High match
Power Consumption
Validation required
Parts at a glance
Part B
AD9220ARS-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4696 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 | AD9225ARS | AD9220ARS-REEL | 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 | The maximum conversion rate determines the usable input bandwidth and whether the part meets the system's Nyquist and oversampling requirements. |
| Input Type | Differential | Single-ended | Differential inputs offer better common-mode rejection and distortion performance, while single-ended inputs simplify the analog front end. |
| Supply Voltage | 5 V | 5 V | Matching supply requirements allows the same power rail to be reused without redesigning the power tree. |
| Power Consumption | 280 mW typical | 100 mW typical | Lower power dissipation reduces thermal load and may be critical in densely packed or thermally constrained designs. |
| SNR | 71 dB | 70 dB | Signal-to-noise ratio directly affects the effective number of bits and the achievable dynamic range of the acquisition system. |
| Package | 28-Lead SSOP | 28-Lead SSOP | Identical package and pinout enable drop-in board replacement without layout changes. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Equivalent temperature ratings ensure both parts meet the same environmental and reliability requirements. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9225ARS | AD9220ARS-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 AD9220ARS-REEL?
The AD9225ARS is a 12-bit, 25 MSPS analog-to-digital converter, while the AD9220ARS-REEL is a 12-bit, 10 MSPS ADC. Both are members of Analog Devices' AD922x family, offered in a 28-lead SSOP (RS) package, but they differ in maximum sampling rate, power consumption, and dynamic performance. The AD9225ARS supports higher throughput and consumes more power, whereas the AD9220ARS-REEL is optimized for lower-speed, lower-power applications. The "-REEL" suffix indicates tape-and-reel packaging for automated assembly.
Are the AD9225ARS and AD9220ARS-REEL pin-compatible?
Yes. Both devices are offered in the same 28-lead SSOP (RS) package and share the same pinout as members of the AD922x family. This allows a common PCB footprint, but designers must still verify that the sampling rate, power, and timing differences are acceptable for the target design before substituting one for the other.
What is the maximum sampling rate of each device?
The AD9225ARS has a maximum sampling rate of 25 MSPS. The AD9220ARS-REEL has a maximum sampling rate of 10 MSPS. Designs requiring sample rates above 10 MSPS must use the AD9225ARS or another higher-speed converter.
How do the power consumption figures compare?
The AD9225ARS typically dissipates about 280 mW at 25 MSPS from a single 5 V supply. The AD9220ARS-REEL typically dissipates about 100 mW at 10 MSPS. The lower power of the AD9220ARS-REEL makes it preferable for power-sensitive, lower-speed designs, while the AD9225ARS trades higher power for greater throughput.
What are the resolution and SNR characteristics of these converters?
Both devices provide 12-bit resolution. The AD9225ARS achieves a signal-to-noise ratio (SNR) of approximately 71 dB, while the AD9220ARS-REEL achieves approximately 70 dB. These figures are typical values at the respective rated sampling rates and should be confirmed against the latest Analog Devices datasheets for the specific operating conditions.
What does the "-REEL" suffix mean on the AD9220ARS-REEL?
The "-REEL" suffix denotes tape-and-reel packaging, which is intended for high-volume automated pick-and-place assembly. The AD9225ARS is typically supplied in tube or tray packaging unless a reel option is explicitly ordered. Electrically, the reel packaging does not change the device specifications.
Can the AD9220ARS-REEL be used as a drop-in replacement for the AD9225ARS?
Because both parts share the same 28-lead SSOP package and pinout, the AD9220ARS-REEL can physically fit the same footprint. However, it is not a functional drop-in replacement where 25 MSPS throughput is required, since the AD9220ARS-REEL is limited to 10 MSPS. The substitution is only valid if the system's sampling rate, timing, and dynamic performance requirements are satisfied by the lower-speed device.
What supply voltage and input configuration do these ADCs require?
Both the AD9225ARS and AD9220ARS-REEL operate from a single 5 V analog supply and include an on-chip sample-and-hold amplifier with a differential input. They provide a flexible input range and are designed for AC-coupled or DC-coupled signal chains. Designers should consult the respective Analog Devices datasheets for exact input span, reference, and clocking requirements.