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Analog Devices Inc. AD9221ARSZ-REEL
- Part No.:
- AD9221ARSZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
AD9221ARSZ-REEL.pdf
- Description:
- IC ADC 12BIT PIPELINED 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,150
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Product details
Overview
AD9221ARSZ-REEL 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 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), enabling high-fidelity data acquisition in medical imaging front-ends.
For engineers reviewing the AD9221ARSZ-REEL datasheet, AD9221ARSZ-REEL pinout, AD9221ARSZ-REEL application, or AD9221ARSZ-REEL equivalent, key selection criteria include its 1.5 MSPS sampling rate, SOIC-28 package compatibility, straight-binary output format, out-of-range (OTR) flag support, and differential/single-ended analog input flexibility for precision signal chain design.
Technical Context
The AD9221ARSZ-REEL implements a four-stage differential pipelined ADC architecture with digital error correction logic, guaranteeing no missing codes over –40°C to +85°C. Its sample-and-hold amplifier supports both single-ended and differential inputs with configurable common-mode level (via CML pin) and selectable input span (2 V or 5 V p-p).
Internal voltage reference operates in 1 V or 2.5 V mode, with ±35 mV tolerance at 2.5 V; external reference is also supported. Clock input controls all conversion cycles, with pipeline latency fixed at 3 clock cycles and aperture jitter specified at 4 ps rms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit guaranteed, no missing codes across full temperature range |
| Max Conversion Rate | 1.5 MSPS - defines maximum sustained sampling frequency for real-time waveform capture |
| INL (typ) | ±0.4 LSB - ensures accurate DC linearity for calibration-critical sensor interfaces |
| SINAD (typ) | 70 dB at 100 kHz - enables >11.3 ENOB for high-fidelity baseband signal digitization |
| Input-Referred Noise | 0.09 LSB rms (VREF = 2.5 V) - supports low-noise measurement of sub-millivolt-level signals |
| Power Consumption | 59 mW typ (5 V AVDD/DVDD) - suitable for power-constrained portable instrumentation |
| Supply Range | AVDD = 5 V ±5%; DVDD = 2.7–5.25 V - allows mixed-voltage system integration |
Pinout & Package
AD9221ARSZ-REEL is housed in a 28-lead SOIC package (package option R-28), with 1.27 mm lead pitch and standard JEDEC MS-012AC footprint. Thermal resistance θJA = 71.4°C/W enables operation up to +85°C ambient without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK | Clock Input | Rising-edge-triggered master timing source; minimum pulse width 300 ns |
| VINA / VINB | Differential Analog Inputs | Accepts single-ended or differential signals; core input = VINA – VINB |
| VREF / REFCOM | Reference I/O | Configurable 1 V or 2.5 V internal reference; REFCOM is reference ground return |
| BIT 1–BIT 12 | Digital Output Bus | Straight-binary format; BIT 1 = MSB, BIT 12 = LSB; latched on clock rising edge |
| OTR | Out-of-Range Flag | Active-high indicator signaling overflow; used with MSB to distinguish high/low saturation |
| SENSE | Reference Select | Logic-high selects 2.5 V reference mode; logic-low selects 1 V mode |
| CAPT / CAPB | Noise Reduction Terminals | Connect 0.1 µF bypass capacitors to AVSS for improved reference stability and SNR |
| CML | Common-Mode Level | Biased at AVDD/2 (2.5 V) to set optimal input common-mode voltage for lowest THD |
Key Features
| Feature | Design Value |
|---|---|
| On-chip Sample-and-Hold Amplifier | Enables direct connection to multiplexed sensors or RF IF stages without external buffering |
| Programmable Internal Voltage Reference | Reduces BOM count by eliminating external reference ICs; supports 1 V or 2.5 V modes via SENSE pin |
| Differential Input Architecture | Rejects common-mode noise and improves dynamic performance beyond Nyquist in Direct-IF systems |
| Flexible Digital Interface | Output drivers compatible with both 3.3 V and 5 V logic families; straight-binary output simplifies FPGA interface |
| Low Aperture Jitter | 4 ps rms enables <70 dB SINAD at 1 MHz input without external clock conditioning |
Applications
| Medical Ultrasound Front-End | Industrial Process Monitoring |
|---|---|
|
Use Scenario: Digitizing echo return signals from piezoelectric transducers with 12-bit resolution and low noise floor. IC Role / Device Role / Timing Role: Primary ADC capturing time-domain RF envelope data at 1.5 MSPS with precise amplitude fidelity. Use Value: 0.09 LSB input-referred noise preserves weak echo amplitudes; differential input rejects EMI from adjacent motor drives. |
Use Scenario: High-accuracy analog monitoring of pressure, temperature, and flow sensor outputs in PLC modules. IC Role / Device Role / Timing Role: Precision DC-coupled digitizer interfacing with bridge-based sensors and 4–20 mA loop receivers. Use Value: ±0.4 LSB INL ensures traceable calibration; on-chip 2.5 V reference eliminates drift-induced offset errors. |
| Communications Baseband Receiver | Test & Measurement Equipment |
|
Use Scenario: Direct-IF sampling of QAM-modulated signals after quadrature downconversion in cellular infrastructure. IC Role / Device Role / Timing Role: Low-jitter ADC converting complex baseband I/Q pairs with matched gain and phase response. Use Value: Differential architecture achieves >86 dB SFDR; CML pin enables optimal common-mode bias for IQ balance. |
Use Scenario: Embedded digitizer in portable oscilloscopes and signal analyzers requiring stable 12-bit resolution at moderate bandwidth. IC Role / Device Role / Timing Role: Core acquisition engine synchronizing to internal clock generator with deterministic 3-cycle latency. Use Value: Guaranteed no missing codes prevents waveform distortion; OTR flag supports automatic range scaling during sweep. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9223ARSZ-REEL | 3 MSPS max rate, 100 mW power, identical pinout and interface | Better suited for higher-bandwidth communications monitoring where 1.5 MSPS is limiting | Select when system requires ≥2 MSPS sampling without layout change |
| ADS7822U | 12-bit, 200 kSPS, SPI interface, 5 V supply, SO-8 package | Limited to low-speed sensor readout; lacks differential input and on-chip reference | Choose only for cost-sensitive, space-constrained designs with <200 kSPS requirement |
Compared with AD9221ARSZ-REEL, AD9223ARSZ-REEL offers higher throughput at increased power, while ADS7822U trades speed, features, and accuracy for compactness and interface simplicity-making each viable only within distinct bandwidth, feature, and form-factor boundaries.
Availability
AD9221ARSZ-REEL is available at Aetrix Electronics and suitable for medical imaging subsystems, industrial process controllers, and communications test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AD9221ARSZ-REEL 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 AD9221ARSZ-REEL belongs to the AD922x family of monolithic 12-bit pipelined ADCs designed for precision data acquisition in medical, industrial, and communications systems where low power, on-chip integration, and flexible analog interfacing are critical.
FAQ
What is the maximum sampling rate supported by the AD9221ARSZ-REEL?
The AD9221ARSZ-REEL supports a maximum conversion rate of 1.5 MSPS, as confirmed in the Absolute Maximum Ratings and AC Specifications tables. This rate is guaranteed across the full operating temperature range (–40°C to +85°C) with AVDD = 5 V, DVDD = 5 V, and VREF = 2.5 V. Exceeding this rate degrades dynamic performance and may cause missing codes.
Does the AD9221ARSZ-REEL require an external voltage reference?
No, the AD9221ARSZ-REEL includes a fully integrated, programmable voltage reference supporting 1 V or 2.5 V output modes selected via the SENSE pin. External reference is optional and only needed when tighter initial accuracy (<±35 mV) or lower temperature drift is required than the internal reference provides.
How is differential input configured on the AD9221ARSZ-REEL?
Differential input on the AD9221ARSZ-REEL is implemented using VINA (non-inverting) and VINB (inverting) pins; the core input is defined as VINA – VINB. To configure, apply complementary signals centered at CML = AVDD/2 (2.5 V), ensure matched source impedances, and tie CAPT/CAPB to AVSS via 0.1 µF capacitors for optimal noise rejection.
What does the OTR (Out-of-Range) signal indicate on the AD9221ARSZ-REEL?
The OTR signal on the AD9221ARSZ-REEL is an active-high flag indicating analog input has exceeded the valid range defined by ±VREF. When asserted, it works with the MSB to distinguish between high overflow (MSB = 1, OTR = 1) and low overflow (MSB = 0, OTR = 1), enabling robust saturation detection in closed-loop control systems.
Is the AD9221ARSZ-REEL pin-compatible with other members of the AD922x family?
Yes, the AD9221ARSZ-REEL shares identical pinout, package (28-lead SOIC), and interface with AD9223ARSZ-REEL and AD9220ARSZ-REEL. This allows direct substitution within the same PCB layout when upgrading or downgrading sampling rate and power requirements without hardware revision.
AD9221ARSZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- -
AD9221ARSZ-REEL FAQ
1.How can I place an order for AD9221ARSZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9221ARSZ-REEL 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 AD9221ARSZ-REEL reliable?
The price and inventory of AD9221ARSZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9221ARSZ-REEL is usually 5 days.
3.What payment methods are accepted for AD9221ARSZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9221ARSZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9221ARSZ-REEL?
AD9221ARSZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9221ARSZ-REEL 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 AD9221ARSZ-REEL?
For technical support, including AD9221ARSZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9221ARSZ-REEL requirements.
6.How does Aetrix verify that AD9221ARSZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD9221ARSZ-REEL 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 AD9221ARSZ-REEL meets industry standards.
7.What is the process for return or replacement of AD9221ARSZ-REEL?
All AD9221ARSZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD9221ARSZ-REEL, 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 AD9221ARSZ-REEL part is unused and in its original packaging.
Return procedure for AD9221ARSZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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