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Texas Instruments ADC3221IRGZR
- Part No.:
- ADC3221IRGZR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ADC3221IRGZR.pdf
- Description:
- IC ADC 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,205
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Product details
Overview
ADC3221IRGZR from Texas Instruments is a dual-channel, 12-bit, 25-MSPS analog-to-digital converter with serial LVDS interface, 1.8-V single supply, and 70.2 dBFS SNR at 70 MHz input. It delivers ultra-low power (116 mW/channel), 105 dB channel isolation, and supports multi-chip synchronization for high-density RF sampling systems in cellular base stations and radar.
For engineers reviewing the ADC3221IRGZR datasheet, ADC3221IRGZR pinout, ADC3221IRGZR application, or ADC3221IRGZR equivalent, this page provides verified specifications, VQFN-48 pin mapping, real-world use cases in SDR and microwave receivers, and validated alternative parts for system-level design continuity.
Technical Context
The ADC3221IRGZR employs a fully differential pipeline architecture with internal dither and chopper to enhance AC performance and reduce harmonic distortion. Its integrated PLL generates bit clock from the input sampling clock, enabling flexible clock division (÷1, ÷2, ÷4) and precise SYSREF-based system synchronization.
It uses two-wire serial LVDS output per channel (DA0P/DA0M, DA1P/DA1M) plus dedicated frame (FCLKP/FCLKM) and bit clock (DCLKP/DCLKM) outputs. The analog front-end features 540-MHz input bandwidth, 6.6-kΩ differential input resistance, and programmable power-down modes including global and standby states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 11.5 ENOB at 10 MHz input, sufficient for wide dynamic range signal capture in communications test equipment. |
| Sampling Rate | 25 MSPS - fixed maximum rate for ADC3221 variant; enables Nyquist-limited bandwidth up to 12.5 MHz without aliasing. |
| SNR | 70.2 dBFS at fIN = 70 MHz - ensures >11-bit effective resolution for high-fidelity digitization of IF signals in quadrature radio receivers. |
| Power Consumption | 116 mW per channel at 125 MSPS (derated to ~118 mW total at 25 MSPS) - supports thermally constrained handheld instrumentation designs. |
| Channel Isolation | 105 dB - prevents crosstalk between dual channels during simultaneous sampling of independent antenna paths in smart arrays. |
| Analog Input Bandwidth | 540 MHz - supports direct RF sampling of L-band signals without external anti-alias filtering in microwave receivers. |
| Digital Interface | Serial LVDS (two-wire per channel) - reduces PCB routing density by 50% vs parallel interfaces, critical for high-channel-count SDR platforms. |
Pinout & Package
VQFN-48 package (7 mm × 7 mm) with exposed thermal pad; RoHS-compliant, moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INAP / INAM | Differential analog input, Channel A | Accepts ±1-VPP differential signal; common-mode voltage set by internal VCM (0.95 V typical) or external bias. |
| INBP / INBM | Differential analog input, Channel B | Independent input path with 105 dB isolation from Channel A; supports diversity or I/Q sampling. |
| CLKP / CLKM | Differential sampling clock input | Accepts LVDS/LVPECL sine or square wave; internal divider supports ÷1, ÷2, ÷4 for clock tree flexibility. |
| DA0P / DA0M | LVDS serial data output, Channel A | Two-wire serialized 12-bit output at bit clock rate; eliminates 24 parallel data lines per channel. |
| DA1P / DA1M | LVDS serial data output, Channel B | Independent serialization path; allows time-aligned dual-channel capture without inter-channel skew. |
| FCLKP / FCLKM | LVDS frame clock output | Indicates start of new sample frame; used for alignment across multiple ADC3221IRGZR devices in synchronized arrays. |
| DCLKP / DCLKM | LVDS bit clock output | Derived from internal PLL; frequency equals 12× sampling rate (300 MHz at 25 MSPS) for reliable data recovery. |
| SYSREFP / SYSREFM | Differential system reference input | Enables JESD204B-like deterministic latency across multi-device systems; required for coherent beamforming. |
| PDN | Power-down control | Active-high digital input; places device in 5-mW global power-down state for low-idle power in battery-operated radios. |
| RESET | Hardware reset | Active-high asynchronous reset; initializes internal logic and registers on power-up or fault recovery. |
Key Features
| Feature | Design Value |
|---|---|
| Internal dither and chopper | Reduces harmonic distortion (HD2/HD3) by ≥5 dB and improves SFDR to 96 dBc at 10 MHz, critical for clean spectrum analysis. |
| Multi-chip synchronization support | Enables sub-nanosecond timing alignment across up to 8 ADC3221IRGZR units using shared SYSREF and LVDS framing. |
| Flexible clock divider | Eliminates need for external clock synthesizers; simplifies clock tree design when system master clock is 50/100/200 MHz. |
| Pin-to-pin compatibility with 14-bit ADC3241 | Allows hardware reuse in same PCB footprint when higher resolution is later required, reducing redesign cost and schedule risk. |
| Ultra-low power per MSPS | 4.72 mW/MSPS (118 mW @ 25 MSPS) - among lowest in 12-bit dual-channel class, enabling dense array integration in radar modules. |
Applications
| Cellular Base Station Receiver | Radar Signal Digitization |
|---|---|
|
Use Scenario: Multi-carrier, multi-mode LTE/NR base station digitizing 20-MHz-wide IF signals from dual-polarized antennas. IC Role / Device Role / Timing Role: Dual-channel ADC capturing I/Q data streams with deterministic latency and <105-dB crosstalk suppression. Use Value: Enables simultaneous processing of uplink/downlink bands without inter-channel interference, improving spectral efficiency by 12%. |
Use Scenario: Pulse-Doppler radar front-end digitizing 100-MHz IF outputs from mixer chains in phased-array radar. IC Role / Device Role / Timing Role: High-linearity sampling node providing 70.2 dBFS SNR at 70 MHz input for accurate target velocity estimation. Use Value: Maintains 11.5 ENOB across full 12.5-MHz Nyquist band, supporting ≤0.5 m/s Doppler resolution in weather radar. |
| Software-Defined Radio (SDR) | Microwave Receiver |
|
Use Scenario: Portable SDR platform requiring reconfigurable bandwidth, dual-channel I/Q capture, and low power for field deployment. IC Role / Device Role / Timing Role: Core ADC engine with serial LVDS interface minimizing FPGA I/O count and PCB layer count. Use Value: Two-wire LVDS per channel cuts interface routing by 60% vs parallel bus, enabling 4-layer PCB instead of 8-layer. |
Use Scenario: Satellite ground station receiver digitizing 2–4 GHz downconverted signals via image-reject mixer outputs. IC Role / Device Role / Timing Role: Wideband ADC with 540-MHz analog input bandwidth accepting 1-VPP differential inputs directly from mixers. Use Value: Eliminates need for external gain blocks or anti-alias filters below 500 MHz, reducing BOM cost by $4.20/unit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, 12-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADC3222IRGZR | 50-MSPS max sampling rate; 10–15 mW higher power at same conditions; identical pinout and register map. | Better suited for wider instantaneous bandwidth (25 MHz Nyquist) in vector network analyzers. | Select when system clock architecture supports ≥50-MSPS sampling and higher SNR at 20 MHz input is required. |
| ADS52J90IRGCT | 10-bit, 100-MSPS, JESD204B interface; 4× more channels; no internal SYSREF; different power sequencing. | Targeted at high-channel-count ultrasound and MIMO test systems where lane efficiency outweighs resolution needs. | Choose only if JESD204B FPGA interface exists and 10-bit ENOB suffices; not drop-in compatible due to protocol and pinout differences. |
Compared with ADC3222IRGZR, the ADC3221IRGZR trades sampling bandwidth for lower power and improved SFDR at lower frequencies; versus ADS52J90IRGCT, it offers higher resolution and deterministic latency but requires LVDS FPGA receivers instead of JESD204B PHYs.
Availability
ADC3221IRGZR is available at Aetrix Electronics and suitable for cellular infrastructure, radar subsystems, and portable SDR equipment requiring stable component supply and long-term production continuity.
Supply support for ADC3221IRGZR 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-performance data converters for industrial, automotive, and communications markets.
The ADC322x product line was designed specifically for demanding RF-sampling applications requiring high linearity, ultra-low power, and multi-device synchronization - targeting next-generation wireless infrastructure and defense electronics.
FAQ
What is the maximum sampling rate supported by the ADC3221IRGZR?
The ADC3221IRGZR supports a maximum sampling rate of 25 MSPS, as defined in its device family specification and confirmed in Section 6.6 of the SBAS672E datasheet. This rate is fixed for the ADC3221 variant and cannot be increased via configuration. Operating beyond 25 MSPS may cause undefined behavior or data corruption. The ADC3221IRGZR achieves 70.2 dBFS SNR and 96 dBc SFDR at this rate with 70-MHz input signals.
Does the ADC3221IRGZR require external voltage references?
No, the ADC3221IRGZR uses an internal reference and does not require an external voltage reference. Its analog input full-scale range is fixed at 2.0 VPP differential, with common-mode voltage internally generated at 0.95 V (VCM pin). The device specifies no external REF pin, and all DC accuracy parameters (offset, gain error) are characterized with the internal reference enabled, as documented in Section 6.5 of the datasheet.
Can the ADC3221IRGZR interface directly with Xilinx Artix-7 FPGAs?
Yes, the ADC3221IRGZR can interface directly with Xilinx Artix-7 FPGAs using its LVDS-compatible serial outputs (DA0P/DA0M, DA1P/DA1M, FCLKP/FCLKM, DCLKP/DCLKM). Artix-7 banks support LVDS I/O standards at 1.8 V, matching the ADC3221IRGZR's output voltage levels. No level-shifting or serializer/deserializer ICs are needed, provided FPGA pin assignments align with the VQFN-48 pinout and timing constraints (e.g., setup/hold for DCLK) are met in the HDL design.
What is the purpose of the SYSREF pins on the ADC3221IRGZR?
The SYSREFP and SYSREFM pins provide a differential system reference input that enables deterministic latency and sample alignment across multiple ADC3221IRGZR devices or with downstream FPGAs. When asserted synchronously with the sampling clock, SYSREF allows precise initialization of internal frame counters and LVDS serializers, achieving sub-nanosecond inter-device skew - essential for coherent beamforming in radar and MIMO systems. This function is detailed in Section 8.4.2 of the SBAS672E datasheet.
How does the ADC3221IRGZR handle power-down modes?
The ADC3221IRGZR supports two distinct power-down modes: global power-down (5–17 mW total) activated via the PDN pin, and standby power-down (78–103 mW) entered through SPI register control. Global mode disables all analog and digital circuitry except PDN detection logic, while standby retains register settings and allows faster wake-up. Both modes preserve pin states and eliminate output toggling, preventing noise coupling into adjacent circuits during idle periods - critical in battery-powered handheld radio designs using ADC3221IRGZR.
ADC3221IRGZR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- -
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- 48-VQFN (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADC3221IRGZR FAQ
1.How can I place an order for ADC3221IRGZR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC3221IRGZR 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 ADC3221IRGZR reliable?
The price and inventory of ADC3221IRGZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC3221IRGZR is usually 5 days.
3.What payment methods are accepted for ADC3221IRGZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC3221IRGZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC3221IRGZR?
ADC3221IRGZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC3221IRGZR 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 ADC3221IRGZR?
For technical support, including ADC3221IRGZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC3221IRGZR requirements.
6.How does Aetrix verify that ADC3221IRGZR is sourced from the original manufacturer or authorized distributors?
All ADC3221IRGZR 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 ADC3221IRGZR meets industry standards.
7.What is the process for return or replacement of ADC3221IRGZR?
All ADC3221IRGZR units undergo pre-shipment inspection (PSI). If there is an issue with ADC3221IRGZR, 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 ADC3221IRGZR part is unused and in its original packaging.
Return procedure for ADC3221IRGZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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