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Texas Instruments ADS4122IRGZR
- Part No.:
- ADS4122IRGZR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ADS4122IRGZR.pdf
- Description:
- IC ADC 12BIT PIPELINED 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,582
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Product details
Overview
ADS4122IRGZR from Texas Instruments is a 12-bit, 65-MSPS ultra-low-power analog-to-digital converter (ADC) with differential LVDS/CMOS output interface, 1.8-V single-supply operation, and integrated DC offset correction. It delivers 70.2 dBFS SNR at 170 MHz input and 85 dBc SFDR, targeting wideband communications signal acquisition in multi-carrier base stations.
For engineers reviewing the ADS4122IRGZR datasheet, ADS4122IRGZR pinout, ADS4122IRGZR application, or ADS4122IRGZR equivalent, this page provides verified technical context, validated pin functions for VQFN-48 package, real-world dynamic performance metrics at 65 MSPS, and confirmed alternatives for wireless infrastructure and SDR designs.
Technical Context
The ADS4122IRGZR employs a pipelined ADC architecture with on-chip analog input buffers and programmable gain up to 6 dB to optimize SFDR/SNR trade-offs at high input frequencies. Its dual-mode DDR LVDS/CMOS digital interface supports flexible system interfacing while maintaining low power consumption.
Dynamic power scaling adjusts internal biasing automatically below 65 MSPS without performance loss; DC offset correction loop actively cancels ADC input-referred offset. Clock input accepts as low as 200 mVPP differential amplitude, enabling direct connection to low-swing clock sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - defines quantization step size and theoretical maximum SNR of 74.0 dBFS |
| Sampling Rate | 65 MSPS - fixed maximum sample rate; supports lower rates with automatic power scaling |
| SNR @ 170 MHz | 70.2 dBFS - measured signal-to-noise ratio with –1-dBFS 170-MHz input, indicating usable dynamic range |
| SFDR @ 170 MHz | 85 dBc - spurious-free dynamic range confirms strong rejection of harmonic and intermodulation distortion |
| Supply Voltage | 1.8 V (AVDD/DRVDD) - single-supply operation reduces power rail complexity and PCB area |
| Power Consumption | 103 mW at 65 MSPS - enables thermal-constrained designs in dense RF front-end modules |
| Analog Input Bandwidth | 400 MHz (2-VPP) - supports Nyquist-zone sampling of wideband IF signals up to 200 MHz |
Pinout & Package
VQFN-48 package (7.0 mm × 7.0 mm) with exposed thermal pad connected to DRGND; RoHS-compliant, industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INP / INM | Differential analog input | Accepts 2-VPP max differential signal; biased by internal 0.95-V VCM reference |
| CLKP / CLKM | Differential clock input | Supports 200 mVPP min amplitude; enables jitter-tolerant sampling at 65 MSPS |
| D0_D1_P / D0_D1_M | LVDS data output pair (D0, D1) | DDR LVDS outputs multiplexed per clock edge; standard 350-mV swing, 100-Ω termination |
| DFS | Data format select | Configures output interface mode (LVDS vs CMOS) and data format (twos complement/offset binary) |
| OE | Output enable | Active-high control with internal 180-kΩ pullup; allows synchronous output gating during standby |
| VCM | Common-mode voltage output | Provides stable 0.95-V reference for external input biasing networks |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power at 1.8 V | 103 mW total at 65 MSPS - enables battery-aware or thermally constrained SDR platforms |
| Programmable gain (0–6 dB) | Improves SFDR by >3 dB at high input frequencies while preserving SNR at reduced full-scale ranges |
| DC offset correction loop | Reduces input-referred offset to <1 LSB, eliminating need for external calibration in closed-loop systems |
| Dynamic power scaling | Automatically reduces current draw at lower sampling rates without degrading SNR or SFDR |
| Low-clock-amplitude support | Operates reliably with 200 mVPP differential clock - simplifies clock tree design and reduces EMI |
Applications
| Wireless Base Station Receiver | Software-Defined Radio Front End |
|---|---|
|
Use Scenario: Digitizing multi-carrier WCDMA/LTE IF signals at 140–180 MHz center frequency in macrocell BTS. IC Role / Device Role / Timing Role: Primary ADC capturing wide instantaneous bandwidth with minimal added noise and distortion. Use Value: 70.2 dBFS SNR and 85 dBc SFDR ensure accurate demodulation of adjacent channels under high interference. |
Use Scenario: Reconfigurable RF sampling path in field-deployable SDR transceivers operating across 10–300 MHz. IC Role / Device Role / Timing Role: High-fidelity digitizer supporting adaptive sampling rate and gain settings via serial interface. Use Value: Dynamic power scaling and programmable gain allow real-time optimization for varying signal bandwidths and SNR requirements. |
| Power Amplifier Linearization | Medical Ultrasound Beamformer |
|
Use Scenario: Capturing PA output for digital predistortion (DPD) feedback in 5G mMIMO active antenna units. IC Role / Device Role / Timing Role: High-linearity acquisition channel synchronized to transmit clock for real-time error vector analysis. Use Value: 85 dBc SFDR prevents DPD algorithm corruption from harmonics generated by PA nonlinearities. |
Use Scenario: Digitizing echo return signals from phased-array transducers in portable ultrasound systems. IC Role / Device Role / Timing Role: Low-power, high-SNR ADC enabling longer battery life without sacrificing image resolution. Use Value: 103-mW power budget and 70.2 dBFS SNR support >120-dB dynamic range imaging at 65 MSPS sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS4125IRGZR | 12-bit, 125-MSPS variant with identical VQFN-48 package and pinout; higher power (153 mW) and slightly lower SFDR at 170 MHz (81 dBc) | Required when system clock rate exceeds 65 MSPS; suitable for wider instantaneous bandwidth capture | Select ADS4125IRGZR only if sampling rate >65 MSPS is mandatory; otherwise ADS4122IRGZR offers better power efficiency |
| ADS4142IRGZR | 14-bit, 65-MSPS variant in same package; higher resolution but lower SFDR (70 dBc) at 170 MHz and higher power (115 mW) | Preferred when quantization noise dominates system noise floor, e.g., narrowband high-SNR receivers | Choose ADS4142IRGZR when 14-bit resolution is critical and SFDR >70 dBc suffices; ADS4122IRGZR excels in wideband distortion-limited scenarios |
Compared with ADS4125IRGZR and ADS4142IRGZR, the ADS4122IRGZR uniquely balances 65-MSPS throughput, 70.2-dBFS SNR, 85-dBc SFDR, and 103-mW power-making it optimal for cost- and thermal-sensitive wideband communications where 12-bit resolution meets system requirements.
Availability
ADS4122IRGZR is available at Aetrix Electronics and suitable for wireless infrastructure, software-defined radio, and power amplifier linearization applications requiring stable component supply and long-term industrial-grade availability.
Supply support for ADS4122IRGZR 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 signal chain solutions for industrial, automotive, and communications markets.
The ADS41xx family-including ADS4122IRGZR-is designed specifically for ultra-low-power, high-dynamic-range digitization in multi-carrier wireless infrastructure and SDR platforms operating from 1.8-V supplies.
FAQ
What is the maximum analog input frequency supported by the ADS4122IRGZR?
The ADS4122IRGZR supports up to 400 MHz analog input frequency with 2-VPP differential amplitude and up to 800 MHz with 1-VPP, per its specified small-signal bandwidth. This enables direct sampling of IF signals in LTE and 5G base station receivers without additional downconversion stages, preserving signal integrity in the ADS4122IRGZR signal path.
Does the ADS4122IRGZR support both LVDS and CMOS output interfaces?
Yes, the ADS4122IRGZR supports both DDR LVDS and parallel CMOS output modes, selected via the DFS pin. In LVDS mode, it outputs multiplexed 12-bit data on differential pairs (e.g., D0_D1_P/M); in CMOS mode, it drives single-ended D0–D11 outputs. The ADS4122IRGZR maintains full 12-bit resolution and timing compliance in both configurations.
What is the purpose of the VCM pin on the ADS4122IRGZR?
The VCM pin on the ADS4122IRGZR outputs a precise 0.95-V common-mode voltage used to bias the differential analog input pins (INP/INM). This eliminates the need for external resistive dividers or op-amp buffers, simplifying front-end design and improving matching between input paths in the ADS4122IRGZR-based signal chain.
How does dynamic power scaling work in the ADS4122IRGZR?
The ADS4122IRGZR automatically reduces internal bias currents when operating below 65 MSPS, lowering total power consumption without degrading SNR or SFDR. This feature is transparent to the user-no register writes or configuration changes are needed-and ensures optimal efficiency across variable-rate applications like burst-mode SDR, making the ADS4122IRGZR ideal for adaptive systems.
Is the ADS4122IRGZR pin-compatible with other devices in the ADS41xx family?
Yes, the ADS4122IRGZR shares identical VQFN-48 (RGZ) package dimensions, thermal pad layout, and pin mapping with ADS4125IRGZR, ADS4142IRGZR, and ADS4145IRGZR. This allows drop-in replacement within the same footprint when upgrading sampling rate or resolution-provided system-level timing, power, and signal integrity constraints are re-verified for the ADS4122IRGZR variant.
ADS4122IRGZR 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:
- 12
- Sampling Rate (Per Second):
- 65M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- LVDS - Parallel, 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:
- 1.7V ~ 1.9V
- Voltage - Supply, Digital:
- 1.7V ~ 1.9V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-VQFN (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS4122IRGZR FAQ
1.How can I place an order for ADS4122IRGZR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS4122IRGZR 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 ADS4122IRGZR reliable?
The price and inventory of ADS4122IRGZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS4122IRGZR is usually 5 days.
3.What payment methods are accepted for ADS4122IRGZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS4122IRGZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS4122IRGZR?
ADS4122IRGZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS4122IRGZR 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 ADS4122IRGZR?
For technical support, including ADS4122IRGZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS4122IRGZR requirements.
6.How does Aetrix verify that ADS4122IRGZR is sourced from the original manufacturer or authorized distributors?
All ADS4122IRGZR 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 ADS4122IRGZR meets industry standards.
7.What is the process for return or replacement of ADS4122IRGZR?
All ADS4122IRGZR units undergo pre-shipment inspection (PSI). If there is an issue with ADS4122IRGZR, 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 ADS4122IRGZR part is unused and in its original packaging.
Return procedure for ADS4122IRGZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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