Part A
AD9224ARSZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4378 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 AD9225ARSZ and AD9224ARSZ are functionally comparable 12-bit monolithic A/D converters sharing the same analog input architecture, package footprint, and supply requirements, with the AD9225ARSZ offering a higher maximum sampling rate. The AD9224ARSZ can serve as a lower-speed functional substitute where the full 25 MSPS throughput of the AD9225ARSZ is not required, but the reduced sample rate must be validated against the target application's timing budget.
Resolution
High match
Maximum Sampling Rate
Validation required
Package Type
High match
Analog Input Architecture
High match
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 | AD9224ARSZ | Why it matters |
|---|---|---|---|
| Resolution | 12 bits | 12 bits | Both converters provide 12-bit resolution, so quantization granularity is equivalent for signal-chain design. |
| Maximum Sampling Rate | 25 MSPS | 40 MSPS | The AD9224 supports a higher Nyquist bandwidth, enabling digitization of faster input signals than the AD9225. |
| Input Type | Differential | Differential | Differential inputs on both parts improve common-mode rejection and dynamic performance in mixed-signal systems. |
| Supply Voltage (Analog and Digital) | 5 V | 5 V | Identical 5 V supply requirements allow the same power rail design when substituting one part for the other. |
| Power Consumption | 280 mW typical | 415 mW typical | The AD9224 dissipates more power at its higher sample rate, affecting thermal and supply budgeting. |
| SNR (Signal-to-Noise Ratio) | 71 dB typical | 69.5 dB typical | Higher SNR in the AD9225 yields better noise-limited dynamic range for lower-speed applications. |
| SFDR (Spurious-Free Dynamic Range) | 85 dBc typical | 80 dBc typical | Better SFDR in the AD9225 indicates fewer spurious tones, which is important for spectral purity in receiver designs. |
| Package | 28-Lead SSOP | 28-Lead SSOP | Identical package and pinout allow drop-in board replacement without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching industrial temperature ranges ensure equivalent environmental qualification for both parts. |
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 | AD9224ARSZ | AD9225ARSZ |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 40M | 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 | 2.85V ~ 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 AD9224ARSZ?
The AD9225ARSZ is a 12-bit, 25 MSPS analog-to-digital converter, while the AD9224ARSZ is a 12-bit, 40 MSPS ADC. Both are monolithic, single-supply, pipelined ADCs from Analog Devices in a 28-lead SSOP package, but the AD9224ARSZ offers a higher maximum sampling rate.
Do the AD9225ARSZ and AD9224ARSZ share the same package and pinout?
Yes. Both devices are offered in a 28-lead SSOP (RS-28) package and are pin-compatible, which allows the AD9224ARSZ to be used as a drop-in upgrade for the AD9225ARSZ when higher sampling rate is required, provided the surrounding circuitry supports the faster clock and timing.
What is the maximum sampling rate of each device?
The AD9225ARSZ supports a maximum sampling rate of 25 MSPS, and the AD9224ARSZ supports a maximum sampling rate of 40 MSPS. Both are 12-bit resolution converters.
What are the power supply requirements for the AD9225ARSZ and AD9224ARSZ?
Both devices operate from a single 5 V analog supply (AVDD) and a 3 V to 5 V digital supply (DVDD), with separate analog and digital ground pins. Power consumption differs: the AD9225ARSZ typically dissipates about 280 mW, while the AD9224ARSZ typically dissipates about 400 mW at their respective maximum sampling rates.
What analog input configuration do these ADCs use?
Both the AD9225ARSZ and AD9224ARSZ feature a differential, pipelined switched-capacitor input with an on-chip sample-and-hold amplifier. They provide a 2 V peak-to-peak differential input span and include an internal reference, with the option to use an external reference for improved accuracy or different input ranges.
What are the typical SNR and SFDR specifications for these converters?
For the AD9225ARSZ, the datasheet specifies a typical SNR of approximately 71 dB and SFDR of approximately 85 dBc for a 2.5 MHz input at 25 MSPS. For the AD9224ARSZ, typical SNR is approximately 70.5 dB and SFDR is approximately 80 dBc for a 5 MHz input at 40 MSPS. Exact values depend on input frequency and operating conditions per the respective datasheets.
Can the AD9224ARSZ directly replace the AD9225ARSZ in an existing design?
Because both parts are pin-compatible 28-lead SSOP devices with the same supply rails and input architecture, the AD9224ARSZ can generally replace the AD9225ARSZ. However, the design must be validated for the higher 40 MSPS clock rate, including clock source jitter, digital output timing, PCB layout, and thermal/power budget, before substitution.
What digital output format do the AD9225ARSZ and AD9224ARSZ provide?
Both devices provide a 12-bit parallel CMOS-compatible digital output with straight binary or twos complement coding, selectable via the output format pin. The output drivers operate from the DVDD supply, allowing interfacing to 3 V or 5 V digital logic.