Part A
AD9221ARSZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2958 個数
- Package
- SSOP-28
- Series
- データ取得 - アナログ/デジタルコンバータ (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD9221ARSZ is a lower-speed, lower-power member of the same pin-compatible AD922x 12-bit ADC family as the AD9225ARSZ, sharing the same 28-lead SSOP footprint and parallel output interface. It can serve as a functional substitute where the reduced 1.5 MSPS sample rate and narrower analog input bandwidth remain acceptable, but the difference in dynamic performance and power consumption must be validated against the target application before substitution.
Resolution and Output Interface
High match
Package and Pinout
High match
Maximum Sample Rate
Validation required
Power Consumption
Validation required
Parts at a glance
Part B
AD9225ARSZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 1539 個数
- Package
- SSOP-28
- Series
- データ取得 - アナログ/デジタルコンバータ (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 | AD9225ARSZ | AD9221ARSZ | 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 | 1.5 MSPS | Maximum sample rate determines the input bandwidth the ADC can support; the AD9225 is far faster and not a drop-in for high-speed Nyquist applications. |
| Input Type | Differential | Differential | Differential inputs improve common-mode rejection and dynamic performance; both parts share this architecture. |
| Supply Voltage (Analog) | 5 V | 5 V | Analog supply compatibility affects board-level power design and interface levels; both operate from a single 5 V rail. |
| Power Consumption | ~280 mW typical | ~70 mW typical | Power dissipation impacts thermal budget and supply sizing; the lower-speed AD9221 consumes significantly less power. |
| SNR | ~71 dB | ~70 dB | Signal-to-noise ratio indicates achievable dynamic range; similar values mean comparable noise performance for a given input. |
| Package | 28-lead SSOP | 28-lead SSOP | Package and pinout compatibility determine whether a part can be physically substituted on an existing PCB. |
| Output Interface | Parallel CMOS | Parallel CMOS | Digital output format must match the downstream FPGA/ASIC interface; both provide parallel CMOS outputs. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Industrial temperature range suitability affects deployment in harsh environments; both parts share the same range. |
Need help validating a replacement?
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9221ARSZ | AD9225ARSZ |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 1.5M | 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 | 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 primary differences between the AD9225ARSZ and AD9221ARSZ?
The AD9225ARSZ is a 12-bit, 25 MSPS analog-to-digital converter, while the AD9221ARSZ is a 12-bit, 1.5 MSPS ADC. Both are members of Analog Devices' AD922x family and share a similar architecture and 28-lead SSOP package, but they differ in maximum sampling rate, power consumption, and dynamic performance specifications.
Are the AD9225ARSZ and AD9221ARSZ pin-compatible?
Yes. Both devices are offered in the same 28-lead SSOP (RS) package and share the same pinout within the AD922x family, allowing a common PCB footprint. However, pin compatibility does not guarantee functional equivalence; the maximum sample rate, power dissipation, and AC performance differ, so the system clock and timing must be validated for the target device.
What is the maximum sampling rate of each device?
The AD9225ARSZ supports a maximum sampling rate of 25 MSPS. The AD9221ARSZ supports a maximum sampling rate of 1.5 MSPS. The clock input should not exceed these limits for reliable operation.
How do the power consumption figures compare?
The AD9225ARSZ typically dissipates about 280 mW at 25 MSPS from a single 5 V supply. The AD9221ARSZ typically dissipates about 60 mW at 1.5 MSPS from a single 5 V supply. Lower sample rate operation in the AD9221ARSZ results in significantly lower power consumption.
Do both converters operate from a single 5 V supply?
Yes. Both the AD9225ARSZ and AD9221ARSZ operate from a single 5 V analog supply and provide a 12-bit parallel CMOS-compatible output. On-chip reference and sample-and-hold circuitry are included in both devices.
Can the AD9221ARSZ be used as a drop-in replacement for the AD9225ARSZ in an existing design?
Not directly without validation. Although the package and pinout are compatible, the AD9221ARSZ has a much lower maximum sample rate (1.5 MSPS versus 25 MSPS) and different AC performance. A design clocked above 1.5 MSPS cannot use the AD9221ARSZ, and dynamic performance requirements must be re-verified against the datasheet.
What are the typical applications for each converter?
The AD9225ARSZ, with its 25 MSPS rate, is suited to higher-speed signal chains such as medical imaging, CCD/camera digitization, and wideband communications. The AD9221ARSZ, at 1.5 MSPS, is suited to lower-speed precision applications such as industrial instrumentation, data acquisition, and battery-powered systems where low power is important.