Part A
AD9221ARSZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 2958 PCS
- Package
- SSOP-28
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD9221ARSZ and AD9220ARS are both 12-bit monolithic A/D converters from Analog Devices in a 28-lead SSOP package, sharing the same analog input architecture and supply requirements, making the AD9221ARSZ a viable functional substitute for the AD9220ARS in many designs. However, the two devices differ in maximum sampling rate and power consumption, so the replacement should be validated against the target system's throughput and thermal budget before adoption.
Sampling Rate
Validation required
Resolution
High match
Package Type
High match
Power Consumption
Validation required
Parts at a glance
Part B
AD9220ARS
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 9216 PCS
- Package
- SSOP-28
- Series
- Acquisition de données - Convertisseur analogique - numérique (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 | AD9221ARSZ | AD9220ARS | 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 | 1.5 MSPS | 10 MSPS | The AD9220 supports a much higher maximum sample rate, enabling wider input bandwidth and faster data acquisition than the AD9221. |
| Input Type | Differential | Differential | Both accept differential inputs, which helps reject common-mode noise and improves dynamic performance. |
| Supply Voltage (Analog) | 5 V | 5 V | Identical analog supply requirements allow the same power rail design to be reused. |
| Power Consumption | 59 mW typical | 250 mW typical | The AD9221 consumes significantly less power, which matters for thermally constrained or battery-powered designs. |
| SNR | 70 dB typical | 70 dB typical | Equivalent signal-to-noise ratio means similar noise-limited dynamic range for both parts. |
| SFDR | 82 dBc typical | 82 dBc typical | Matching spurious-free dynamic range indicates comparable spectral purity in the presence of strong signals. |
| Package | 28-Lead SSOP | 28-Lead SSOP | Identical package and pinout allow drop-in board-level substitution without layout changes. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Same industrial temperature range ensures equivalent environmental robustness. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9221ARSZ | AD9220ARS |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 1.5M | 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 | Internal | External, 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 AD9221ARSZ and the AD9220ARS?
The AD9221ARSZ is a 12-bit, 1.5 MSPS analog-to-digital converter, while the AD9220ARS is a 12-bit, 10 MSPS ADC. Both are monolithic sampling ADCs from Analog Devices in a 28-lead SSOP package, but the AD9220ARS offers a significantly higher maximum sampling rate and correspondingly higher power consumption than the AD9221ARSZ.
Are the AD9221ARSZ and AD9220ARS pin-compatible?
Yes. Both devices are offered in the same 28-lead SSOP (RS) package and share the same pinout, which allows the AD9221ARSZ and AD9220ARS to be used on a common PCB footprint. Designers should still verify supply decoupling, clock routing, and thermal considerations when substituting one for the other.
What are the maximum sampling rates of the AD9221ARSZ and AD9220ARS?
The AD9221ARSZ has a maximum sampling rate of 1.5 MSPS, and the AD9220ARS has a maximum sampling rate of 10 MSPS. Both are 12-bit ADCs, so the AD9220ARS provides substantially higher throughput for higher-bandwidth signal acquisition.
How do the power consumption figures compare between the AD9221ARSZ and AD9220ARS?
The AD9221ARSZ typically consumes about 59 mW at 1.5 MSPS, while the AD9220ARS typically consumes about 250 mW at 10 MSPS. The higher power of the AD9220ARS reflects its higher sampling rate and analog bandwidth capability.
Do the AD9221ARSZ and AD9220ARS have the same analog input range and interface?
Both devices provide a differential analog input and a parallel CMOS-compatible output interface. The AD9221ARSZ and AD9220ARS both support a 2 V peak-to-peak differential input span and include an on-chip reference, allowing similar analog front-end and digital interface designs.
Can the AD9221ARSZ be replaced by the AD9220ARS in an existing design?
Because the AD9221ARSZ and AD9220ARS are pin-compatible and share the same package, the AD9220ARS can often be used as a higher-speed replacement. However, the designer must confirm that the higher power dissipation, supply current, and clock rate of the AD9220ARS are acceptable for the board's thermal and power budget.
What are the typical applications for the AD9221ARSZ versus the AD9220ARS?
The AD9221ARSZ at 1.5 MSPS is suited to lower-power, lower-speed data acquisition, instrumentation, and portable systems. The AD9220ARS at 10 MSPS is better suited to higher-bandwidth applications such as medical imaging, communications receivers, and high-speed data acquisition where higher throughput is required.