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Analog Devices Inc. AD9221ARS
- Part No.:
- AD9221ARS
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
AD9221ARS.pdf
- Description:
- IC ADC 12BIT PIPELINED 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,787
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Product details
Overview
AD9221ARS from Analog Devices is a monolithic 12-bit, 1.5 MSPS analog-to-digital converter with on-chip sample-and-hold amplifier and programmable voltage reference, operating from a single 5 V analog supply and 2.7–5.25 V digital supply. It delivers ±0.4 LSB typical integral nonlinearity, 70 dB SINAD at 100 kHz input, and 0.09 LSB input-referred noise (VREF = 2.5 V), targeting precision data acquisition in medical imaging and communications front-ends.
For engineers reviewing the AD9221ARS datasheet, AD9221ARS pinout, AD9221ARS application, or AD9221ARS equivalent, this page provides verified technical context, package mapping to 28-lead SSOP, confirmed pin functions including CLK, OTR, and differential analog inputs VINA/VINB, and two validated alternative parts for sampling-rate-flexible 12-bit ADC selection.
Technical Context
The AD9221ARS employs a four-stage differential pipelined architecture with digital error correction logic, achieving guaranteed no-missing-codes performance across –40°C to +85°C. Its sample-and-hold amplifier supports both single-ended and differential input configurations, with flexible common-mode level setting via SENSE and CML pins.
Internal voltage reference operates in 1 V or 2.5 V modes, with ±35 mV tolerance at 2.5 V; external reference is supported. Clock input controls all conversion cycles, with 667 ns minimum clock period and 3-cycle pipeline latency-output data appears three clocks after sampling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit guaranteed, with no missing codes over full temperature range |
| Max Conversion Rate | 1.5 MSPS - defines maximum sustained sampling frequency without performance degradation |
| INL (Typ) | ±0.4 LSB - ensures accurate DC linearity for sensor and instrumentation applications |
| SINAD (Typ) | 70 dB at 100 kHz - enables >11.3 ENOB for high-fidelity signal capture |
| Input-Referred Noise | 0.09 LSB rms (VREF = 2.5 V) - limits quantization uncertainty in low-amplitude signal digitization |
| Power Consumption | 59 mW typical - supports low-power portable and battery-backed systems |
| Analog Supply | 5 V ±5% AVDD - requires stable low-noise analog rail for optimal SNR |
Pinout & Package
AD9221ARS is housed in a 28-lead SSOP (RS-28) package with 0.635 mm lead pitch and exposed pad thermal design. Pinout is identical across AD9221/AD9223/AD9220 family members.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK | Clock Input | Single-edge-triggered master timing input; rising edge initiates sampling cycle |
| VINA / VINB | Differential Analog Inputs | Accepts true differential or single-ended signals; core input is VINA – VINB |
| OTR | Out-of-Range Indicator | Active-high flag signaling overflow; used with MSB to distinguish high/low saturation |
| VREF / REFCOM | Reference I/O and Common | Configurable internal 1 V or 2.5 V reference; REFCOM sets reference ground reference point |
| SENSE | Reference Select | Logic-level input selecting internal reference mode (1 V or 2.5 V) |
| BIT 1 (MSB) to BIT 12 (LSB) | Digital Output Data | Straight binary format; latched on clock edge with 8–19 ns output delay |
| AVDD / AVSS / DVDD / DVSS | Analog & Digital Supplies/Grounds | Separate analog/digital power domains minimize noise coupling into conversion path |
Key Features
| Feature | Design Value |
|---|---|
| On-chip Sample-and-Hold Amplifier | Enables direct interface to multiplexed sensors or RF IF stages without external buffering |
| Programmable Internal Voltage Reference | Reduces BOM count by eliminating external reference IC; selectable 1 V or 2.5 V modes |
| Differential Input Architecture | Rejects common-mode noise and improves dynamic performance beyond Nyquist frequency |
| Flexible Power Supply Range | DVDD supports 2.7–5.25 V logic compatibility, enabling interfacing with 3.3 V or 5 V microcontrollers |
| Out-of-Range Detection | Provides real-time saturation monitoring without requiring post-processing analysis of output bits |
Applications
| Medical Ultrasound Imaging | Communications Baseband Receiver |
|---|---|
|
Use Scenario: Digitizing echo return signals from piezoelectric transducers with wide dynamic range and low distortion. IC Role / Device Role / Timing Role: Primary ADC capturing 1–10 MHz IF bandpass signals with 70 dB SINAD and 86 dB SFDR. Use Value: 12-bit resolution and 0.09 LSB noise preserve weak echo amplitudes; differential input rejects probe cable EMI. |
Use Scenario: Converting downconverted I/Q baseband signals in cellular infrastructure receivers. IC Role / Device Role / Timing Role: High-linearity ADC for 1.5 MSPS symbol-rate sampling with straight-binary output compatible with FPGA logic. Use Value: Guaranteed no-missing-codes and ±0.4 LSB INL ensure accurate constellation mapping; OTR flag aids AGC loop response. |
| Industrial Process Monitoring | Test & Measurement Equipment |
|
Use Scenario: High-accuracy acquisition of thermocouple, strain gauge, or RTD sensor outputs in PLC analog input modules. IC Role / Device Role / Timing Role: Precision DC-coupled ADC with internal 2.5 V reference and ±2 ppm/°C gain drift. Use Value: Low 0.09 LSB noise and ±0.3% FSR gain error enable <0.1% measurement accuracy over industrial temperature range. |
Use Scenario: Digitizing calibrated waveforms in portable oscilloscopes and spectrum analyzers. IC Role / Device Role / Timing Role: Medium-speed ADC with 25 MHz full-power bandwidth supporting multi-kHz to low-MHz signal capture. Use Value: 3-cycle latency and straight-binary output simplify real-time buffer management; SSOP package eases layout in compact instruments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9223ARS | 3.0 MSPS max rate, 100 mW power, identical pinout and interface | Higher throughput required for faster sensor arrays or wider IF bandwidths | Select when system clock allows ≥333 ns period and higher dynamic power budget is acceptable |
| ADS8325IPW | 16-bit SAR architecture, 100 kSPS, 5 V supply, 28-TSSOP package | Lower speed but superior DC accuracy (±0.5 LSB INL) and lower noise for precision DC measurements | Choose for high-resolution static measurements where 1.5 MSPS is excessive and 16-bit resolution is critical |
Compared with AD9223ARS and ADS8325IPW, AD9221ARS offers the lowest power (59 mW) and best balance of speed, noise, and linearity for medium-throughput mixed-signal systems-making it optimal when 1.5 MSPS suffices and thermal constraints limit dissipation.
Availability
AD9221ARS is available at Aetrix Electronics and suitable for medical imaging, communications receiver, and industrial process monitoring applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD9221ARS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD9221ARS belongs to the AD922x family of monolithic 12-bit pipelined ADCs designed for cost-sensitive, low-power applications demanding high DC accuracy and AC performance in single-supply systems.
FAQ
What is the maximum sampling rate supported by the AD9221ARS?
The AD9221ARS supports a maximum conversion rate of 1.5 MSPS, with a minimum clock period of 667 ns. This rate is guaranteed across the full operating temperature range (–40°C to +85°C) and maintains specified AC performance including 70 dB SINAD and 86 dB SFDR. Exceeding this rate degrades dynamic specifications and may cause missing codes.
Does the AD9221ARS require an external voltage reference?
No, the AD9221ARS includes a programmable internal voltage reference configurable for 1 V or 2.5 V output via the SENSE pin. External reference is optional and supported through the VREF pin when higher dc accuracy or custom reference voltage is needed. The internal reference has ±35 mV tolerance at 2.5 V mode.
How does the OTR (Out-of-Range) signal function in the AD9221ARS?
The OTR signal in the AD9221ARS is an active-high indicator that asserts when the analog input exceeds the valid range defined by ±VREF. It works in conjunction with the MSB (BIT 1) to distinguish between high overflow (MSB = 1, OTR = 1) and low overflow (MSB = 0, OTR = 1), enabling precise saturation detection without post-processing.
Can the AD9221ARS operate with a 3.3 V digital supply?
Yes, the AD9221ARS supports DVDD from 2.7 V to 5.25 V, making it fully compatible with 3.3 V logic systems. Digital output levels meet VOH ≥ 2.80 V and VOL ≤ 0.4 V under 3.3 V DVDD conditions, ensuring reliable interfacing with standard 3.3 V FPGAs and microcontrollers without level-shifting.
What package type is used for the AD9221ARS and how does it differ from AD9221AR?
The AD9221ARS uses a 28-lead SSOP (RS-28) package with 0.635 mm lead pitch, while AD9221AR uses a 28-lead SOIC (R-28). Both share identical pinout and electrical specifications, but the SSOP offers smaller footprint (10.2 × 5.3 mm vs. 17.9 × 7.5 mm) and improved thermal resistance (JA = 63.3°C/W vs. 71.4°C/W), benefiting space-constrained and thermally sensitive designs.
AD9221ARS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1.5M
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Pipelined
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD9221ARS FAQ
1.How can I place an order for AD9221ARS through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9221ARS on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD9221ARS reliable?
The price and inventory of AD9221ARS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9221ARS is usually 5 days.
3.What payment methods are accepted for AD9221ARS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9221ARS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9221ARS?
AD9221ARS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9221ARS order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD9221ARS?
For technical support, including AD9221ARS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9221ARS requirements.
6.How does Aetrix verify that AD9221ARS is sourced from the original manufacturer or authorized distributors?
All AD9221ARS products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD9221ARS meets industry standards.
7.What is the process for return or replacement of AD9221ARS?
All AD9221ARS units undergo pre-shipment inspection (PSI). If there is an issue with AD9221ARS, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD9221ARS part is unused and in its original packaging.
Return procedure for AD9221ARS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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