Part A
AD9220AR
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5982 ПКС
- Package
- SOIC-28
- Series
- Сбор данных - аналогово-цифровые преобразователи (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD9221AR-REEL is a viable functional substitute for the AD9220AR in many designs, as both are 12-bit monolithic A/D converters in a 28-lead SOIC package with a parallel output interface. However, the AD9221AR-REEL offers a lower maximum sampling rate of 1.5 MSPS versus 10 MSPS for the AD9220AR, so the substitution is only appropriate where the system's sampling requirements fall within the lower-speed device's limits. Designers should confirm timing margins and dynamic performance against their application before committing to the replacement.
Resolution
High match
Output Interface
High match
Maximum Sampling Rate
Validation required
Package Type
High match
Parts at a glance
Part B
AD9221AR-REEL
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8735 ПКС
- Package
- SOIC-28
- Series
- Сбор данных - аналогово-цифровые преобразователи (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 | AD9220AR | AD9221AR-REEL | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both converters provide 12-bit resolution, so quantization granularity is equivalent for signal-chain design. |
| Sampling Rate | 10 MSPS | 1.5 MSPS | The maximum conversion rate determines the input bandwidth and whether the part can serve high-speed acquisition applications. |
| Input Type | Differential, single-ended | Differential, single-ended | Input configuration affects how the analog front end must be driven and whether single-ended or differential sources can be interfaced directly. |
| Supply Voltage | 5 V (single supply) | 5 V (single supply) | Supply voltage compatibility determines whether the part can drop into an existing 5 V rail design without level shifting. |
| Power Consumption | ~250 mW typical | ~60 mW typical | Power dissipation affects thermal budget and supply sizing, especially in dense or battery-sensitive systems. |
| SNR | ~70 dB | ~70 dB | Signal-to-noise ratio indicates achievable dynamic range and effective number of bits in the target application. |
| Package | 28-lead SOIC | 28-lead SOIC | Package and pinout compatibility determine whether the parts are physically interchangeable on an existing PCB footprint. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range confirms suitability for industrial environments and matches the environmental constraints of the design. |
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 | AD9220AR | AD9221AR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 10M | 1.5M |
| 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 | Internal |
| Voltage - Supply, Analog | 5V | 5V |
| Voltage - Supply, Digital | 2.7V ~ 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 AD9220AR and AD9221AR-REEL?
The AD9220AR is a 12-bit, 10 MSPS analog-to-digital converter, while the AD9221AR-REEL is a 12-bit, 1.5 MSPS ADC. Both are pin-compatible members of the Analog Devices AD922x family in a 28-lead SOIC package, but they differ in maximum sampling rate, power consumption, and dynamic performance. The AD9221AR-REEL is supplied in tape-and-reel packaging for automated assembly, whereas the AD9220AR is typically supplied in tube form.
Are the AD9220AR and AD9221AR-REEL pin-compatible?
Yes. Both devices are offered in the same 28-lead SOIC (R-28) package and share the AD922x pinout, which allows a common PCB footprint. However, because the maximum sample rate and power consumption differ, the surrounding clock, input drive, and power-supply design must be validated for the specific device used.
What is the maximum sampling rate of each device?
The AD9220AR is specified for a maximum sampling rate of 10 MSPS. The AD9221AR-REEL is specified for a maximum sampling rate of 1.5 MSPS. Designs requiring higher throughput should use the AD9220AR, while lower-speed applications can use the AD9221AR-REEL.
How do the power consumption figures compare?
The AD9220AR typically dissipates about 250 mW at 10 MSPS from a single 5 V supply. The AD9221AR-REEL typically dissipates about 60 mW at 1.5 MSPS from the same 5 V supply. The lower power of the AD9221AR-REEL makes it preferable for power-sensitive, lower-speed designs.
Do both parts support the same analog input range and interface?
Yes. Both the AD9220AR and AD9221AR-REEL provide a differential analog input with a 2 V p-p full-scale range and a CMOS-compatible parallel output. They also share the same internal reference and clock input structure, so the digital interface and reference configuration are common across the family.
Can the AD9221AR-REEL be used as a drop-in replacement for the AD9220AR?
Only if the system's sampling-rate requirement is 1.5 MSPS or lower. Because the AD9221AR-REEL has a lower maximum sample rate and lower power consumption than the AD9220AR, it can replace the AD9220AR in pin-compatible sockets where the reduced throughput is acceptable. The clock, input filter, and timing budget must be re-verified against the AD9221 datasheet.
What does the "-REEL" suffix indicate on the AD9221AR-REEL?
The "-REEL" suffix indicates tape-and-reel packaging, which is intended for high-volume automated pick-and-place assembly. The AD9220AR is normally supplied in tube packaging. The electrical specifications of the AD9221AR-REEL are those of the standard AD9221AR device; the suffix refers only to the shipping format.
What are the typical applications for each device?
The AD9220AR, with its 10 MSPS throughput, suits higher-speed data acquisition, medical imaging, and communications receive paths. The AD9221AR-REEL, at 1.5 MSPS with lower power, suits portable instrumentation, battery-powered data loggers, and lower-bandwidth sensor interfaces where power efficiency is important.