Part A
AD9280ARS
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2923 PCS
- Package
- SSOP-28
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD9281ARSRL is a strong functional replacement candidate for the AD9280ARS, sharing the same 8-bit resolution, 32 MSPS sampling rate, analog input architecture, and 28-lead SSOP package. Designers should validate the dual-channel configuration and supply voltage requirements against the target application before final adoption.
Resolution and Sampling Rate
High match
Package Type
High match
Channel Count
Validation required
Supply Voltage
Validation required
Parts at a glance
Part B
AD9281ARSRL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8088 PCS
- Package
- SSOP-28
- Series
- Data Acquisition - Analog to Digital Converters (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 | AD9280ARS | AD9281ARSRL | Why it matters |
|---|---|---|---|
| Resolution | 8 bit | 8 bit | Both are 8-bit ADCs, so quantization accuracy is equivalent for substitutability. |
| Number of Channels | 1 | 2 | Channel count determines whether the part can handle single-ended or dual simultaneous signal paths. |
| Sampling Rate | 32 MSPS | 28 MSPS | Maximum sample rate limits the input signal bandwidth the converter can support. |
| Input Type | Single-ended | Differential | Input topology affects analog front-end design and noise immunity requirements. |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Compatible supply range allows the parts to operate in the same power domain. |
| Package / Case | 28-SSOP | 28-SSOP | Identical package footprint enables drop-in board replacement without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature ratings ensure equivalent environmental robustness. |
| Power Consumption | ~95 mW at 32 MSPS | ~120 mW at 28 MSPS | Power draw impacts thermal budget and supply sizing in the target system. |
| Output Interface | Parallel CMOS | Parallel CMOS | Same digital output format allows direct connection to the same downstream logic. |
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 | AD9280ARS | AD9281ARSRL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Obsolete | Obsolete |
| Number of Bits | 8 | 8 |
| Sampling Rate(Per Second) | 32M | 28M |
| Number of Inputs | 1 | 2 |
| 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 | 2 |
| Architecture | Pipelined | Pipelined |
| Reference Type | External | External, Internal |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Features | - | Simultaneous Sampling |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD9280ARS and AD9281ARSRL?
The AD9280ARS is a single 8-bit, 32 MSPS analog-to-digital converter, while the AD9281ARSRL is a dual 8-bit, 28 MSPS ADC. The AD9281ARSRL integrates two ADCs in one package for I/Q or dual-channel sampling, whereas the AD9280ARS provides a single channel. Both are offered in a 28-lead SSOP package.
Are the AD9280ARS and AD9281ARSRL pin-compatible?
No. Although both devices are housed in a 28-lead SSOP (RS) package, their pinouts differ because the AD9281ARSRL contains two ADC channels with separate analog inputs and output buses, while the AD9280ARS is a single-channel device. A direct drop-in replacement is not possible without verifying the pin functions against the respective datasheets.
What are the maximum sampling rates of the AD9280ARS and AD9281ARSRL?
The AD9280ARS has a maximum conversion rate of 32 MSPS. The AD9281ARSRL has a maximum conversion rate of 28 MSPS per channel. Designs requiring the higher 32 MSPS rate should use the AD9280ARS, while dual-channel applications should account for the 28 MSPS limit of the AD9281ARSRL.
Do both devices operate from the same supply voltage?
Yes. Both the AD9280ARS and AD9281ARSRL operate from a single 3.0 V to 5.5 V analog supply, with a separate digital output supply (2.7 V to 5.5 V) for interfacing to logic. This allows both converters to be used in mixed-supply systems with 3 V or 5 V digital logic.
What is the resolution and output format of these ADCs?
Both the AD9280ARS and AD9281ARSRL provide 8-bit resolution with a parallel CMOS-compatible digital output. The output data is presented in straight binary format, allowing direct connection to standard digital signal processors or FPGAs without additional encoding.
Can the AD9281ARSRL be used for I/Q demodulation applications?
Yes. The AD9281ARSRL is a dual 8-bit ADC specifically suited for I/Q baseband sampling in communications systems, since its two matched channels sample the in-phase and quadrature signals simultaneously. The AD9280ARS, being single-channel, would require two devices for the same function.
What is the significance of the "RL" suffix on the AD9281ARSRL part number?
The "RL" suffix indicates tape-and-reel packaging for automated assembly, as opposed to the tube packaging of the AD9281ARS. The electrical specifications of the AD9281ARSRL are identical to the AD9281ARS; only the shipping format differs.