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 AD9221ARS-REEL are functionally identical 12-bit, 1.5 MSPS analog-to-digital converters from the same manufacturer, differing only in packaging format. The AD9221ARSZ is supplied in tube packaging, while the AD9221ARS-REEL is supplied on tape and reel for automated assembly. Both share the same die, electrical specifications, and 28-lead SSOP footprint, making them fully interchangeable for design and production purposes.
Resolution and Sampling Rate
High match
Package and Footprint
High match
Supply Voltage and Interface
High match
Packaging Format
High match
Parts at a glance
Part B
AD9221ARS-REEL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 8495 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 | AD9221ARS-REEL | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Determines the quantization precision of the ADC; both parts provide identical conversion resolution. |
| Sampling Rate | 1.5 MSPS | 1.5 MSPS | Sets the maximum throughput of the converter; identical rates mean equivalent signal bandwidth capability. |
| Number of Inputs / Channels | 1 single-ended | 1 single-ended | Defines how many analog signals can be digitized; both are single-channel devices. |
| Architecture | Pipelined | Pipelined | Affects latency, power, and dynamic performance characteristics; identical architecture ensures equivalent behavior. |
| Supply Voltage | 5 V (single supply) | 5 V (single supply) | Must match the system power rail; both require the same 5 V supply for direct substitution. |
| Package / Case | 20-SSOP | 20-SSOP | Determines PCB footprint and assembly compatibility; identical packages allow drop-in replacement. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Defines the environmental envelope for reliable operation; identical ranges ensure equivalent application suitability. |
| Packaging / Delivery Form | Tube | Tape & Reel | Affects manufacturing handling and automated assembly; the reel version suits high-volume pick-and-place lines while the tube suits low-volume or prototyping. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9221ARSZ | AD9221ARS-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 1.5M | 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 | 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 is the difference between AD9221ARSZ and AD9221ARS-REEL?
Both parts are the same AD9221 12-bit, 1.5 MSPS analog-to-digital converter in a 28-lead SSOP package. The AD9221ARSZ is the standard tube/rail packaging orderable part number, while AD9221ARS-REEL is the tape-and-reel packaging variant intended for automated pick-and-place assembly. The silicon die and electrical specifications are identical; only the packaging and shipping format differ.
Are AD9221ARSZ and AD9221ARS-REEL electrically and functionally interchangeable?
Yes. Both orderable part numbers refer to the same AD9221 converter die in the same 28-lead SSOP (RS-28) package, so electrical performance, pinout, and functional behavior are identical. The only difference is the delivery format (tube vs. tape-and-reel), so they are interchangeable in the target design provided the assembly process supports the respective packaging.
What are the key specifications of the AD9221?
The AD9221 is a 12-bit monolithic analog-to-digital converter with a maximum sampling rate of 1.5 MSPS. It operates from a single 5 V supply, features an on-chip sample-and-hold amplifier, and provides a differential input range of 2 V p-p. It offers signal-to-noise ratio (SNR) of approximately 70 dB and is specified for operation over the industrial temperature range of −40°C to +85°C.
What package does the AD9221ARSZ use, and is it RoHS compliant?
The AD9221ARSZ is supplied in a 28-lead SSOP (Shrink Small Outline Package). The "Z" suffix in the orderable part number denotes a RoHS-compliant, lead-free package finish per Analog Devices' part numbering convention. Designers should confirm the current RoHS status against the official Analog Devices datasheet and product page for the specific orderable part.
Why would a designer choose the AD9221ARS-REEL over the AD9221ARSZ?
The AD9221ARS-REEL is supplied on tape-and-reel, which is the preferred format for high-volume automated surface-mount assembly lines using pick-and-place equipment. The AD9221ARSZ in tube/rail format is typically used for prototyping, low-volume runs, or manual assembly. Selection depends on the production volume and the assembly equipment's feeder compatibility.
What is the maximum sampling rate and resolution of the AD9221?
The AD9221 provides 12-bit resolution with a maximum sampling rate of 1.5 MSPS (mega-samples per second). It is a pipelined architecture converter suitable for applications such as imaging, communications, and data acquisition where moderate speed and 12-bit accuracy are required.
Can the AD9221ARSZ and AD9221ARS-REEL be used in the same PCB footprint?
Yes. Both orderable part numbers use the identical 28-lead SSOP package with the same pinout and land pattern, so the PCB footprint is the same. The choice between them affects only the assembly and procurement process (tube vs. tape-and-reel), not the board layout.