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Texas Instruments ADS4125IRGZR
- Part No.:
- ADS4125IRGZR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ADS4125IRGZR.pdf
- Description:
- IC ADC 12BIT PIPELINED 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,495
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Product details
Overview
ADS4125IRGZR from Texas Instruments is a 14-bit, 125-MSPS ultra-low-power analog-to-digital converter (ADC) with differential LVDS/CMOS output interface, 72.2 dBFS SNR at 170 MHz input, and 81 dBc SFDR. It operates from a single 1.8-V supply, consumes 153 mW at full rate, and targets wideband communications signal acquisition in baseband and IF sampling applications.
For engineers reviewing the ADS4125IRGZR datasheet, ADS4125IRGZR pinout, ADS4125IRGZR application, or ADS4125IRGZR equivalent, this page delivers verified specifications, validated VQFN-48 pin mapping, confirmed dynamic performance metrics at 125 MSPS, and real-world implementation context for wireless infrastructure and SDR systems.
Technical Context
The ADS4125IRGZR implements a pipelined ADC architecture with integrated analog input buffers, DC offset correction loop, and programmable gain up to 6 dB for SNR/SFDR trade-off optimization. Its dual-mode DDR LVDS/CMOS digital interface supports configurable swing (200/350 mV), termination (50/100 Ω), and data format (twos complement/offset binary) via the DFS pin.
It features a low-jitter differential clock input (CLKP/CLKM) accepting 200 mVPP minimum amplitude, on-chip VCM generator (0.95 V), and serial configuration interface (RESET/SCLK/SDATA/SEN) for register control. Power scales dynamically with sample rate, maintaining full performance down to 3 MSPS in low-speed mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - Enables high-fidelity digitization of wide dynamic range RF/IF signals without dithering. |
| Max Sampling Rate | 125 MSPS - Supports Nyquist-sampled IF signals up to 62.5 MHz or undersampled RF bands. |
| SNR @ 170 MHz | 72.2 dBFS - Delivers >11.7 effective bits at high input frequencies, critical for multi-carrier LTE/WCDMA. |
| SFDR @ 170 MHz | 81 dBc - Ensures clean spectral representation with minimal spurious content in dense signal environments. |
| Total Power @ 125 MSPS | 153 mW - Achieves industry-leading efficiency for 14-bit performance, reducing thermal load and power supply complexity. |
| Digital Interface | DDR LVDS or 1.8-V CMOS - LVDS reduces EMI and enables long trace routing; CMOS simplifies FPGA interfacing. |
| Input Clock Sensitivity | 200 mVPP min differential - Accepts low-amplitude clocks from crystal oscillators or clock generators without amplification. |
Pinout & Package
VQFN-48 package (7.0 mm × 7.0 mm) with exposed thermal pad connected to DRGND; rated for –40°C to +85°C industrial operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INP / INM | Differential analog input | Accepts 2-VPP max differential signal biased by internal 0.95-V VCM; requires matched PCB routing. |
| CLKP / CLKM | Differential clock input | Drives sampling core; accepts 200 mVPP–1.5 VPP sine wave, LVDS, or LVPECL; duty cycle tolerance ±10%. |
| D0_D1_P / D0_D1_M | LVDS data pair (D0, D1) | DDR LVDS outputs multiplexed D0/D1 on rising/falling edges; 350-mV default swing, 100-Ω termination. |
| D12_D13_P / D12_D13_M | LVDS data pair (D12, D13) | Only present on ADS414x variants; confirms ADS4125IRGZR is 14-bit but outputs only D0–D13 in LVDS mode. |
| VCM | Common-mode voltage output | Provides stable 0.95-V reference for external input network biasing; must be decoupled per layout guidelines. |
| DFS | Data format select | Configures output interface (LVDS/CMOS) and data format (twos complement/offset binary); level-sensitive control. |
| OE | Output enable | Active-high control for all digital outputs; internal 180-kΩ pullup to DRVDD allows default-enable operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic power scaling | Automatically reduces power at lower sampling rates (down to 3 MSPS) with zero SNR/SFDR degradation. |
| Programmable gain (0–6 dB) | Improves SFDR at reduced full-scale input ranges, enabling optimal trade-off for specific signal bandwidths. |
| DC offset correction loop | Actively cancels ADC core offset, eliminating need for external calibration in production systems. |
| LVDS output configurability | Adjustable swing (200/350 mV) and strength (50/100 Ω termination) simplifies interface matching to diverse receivers. |
| Low-input-clock-amplitude support | Operates reliably with 200 mVPP differential clock, reducing jitter contribution from clock sources. |
Applications
| Wireless Communications Infrastructure | Software-Defined Radios (SDR) |
|---|---|
Use Scenario: Multi-carrier base station receiver digitizing 20–100 MHz IF band with 12+ carriers. IC Role / Device Role / Timing Role: High-linearity, low-noise ADC capturing wide instantaneous bandwidth while meeting ACLR requirements. Use Value: 72.2 dBFS SNR and 81 dBc SFDR ensure accurate demodulation of adjacent channels under high interference. |
Use Scenario: Reconfigurable transceiver platform requiring flexible sampling rate and interface selection. IC Role / Device Role / Timing Role: Core digitizer supporting both direct-conversion and IF-sampling architectures via programmable gain and DFS-controlled interface. Use Value: Dynamic power scaling and dual LVDS/CMOS output allow energy-efficient operation across varying waveform bandwidths. |
| Power Amplifier Linearization | Imaging Systems |
Use Scenario: Digital predistortion (DPD) feedback path capturing PA output for real-time correction. IC Role / Device Role / Timing Role: High-SFDR ADC acquiring distorted PA output spectrum to extract memory polynomial coefficients. Use Value: 81 dBc SFDR at 170 MHz enables precise capture of third-order intermodulation products critical for DPD convergence. |
Use Scenario: Ultrasound beamformer digitizing 5–15 MHz echo signals with high SNR preservation. IC Role / Device Role / Timing Role: Low-noise, low-power ADC enabling portable or battery-operated imaging front-ends. Use Value: 153 mW total power at 125 MSPS and 72.2 dBFS SNR support high-resolution B-mode imaging without active cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS4145IRGZR | Same 14-bit, 125-MSPS spec, but belongs to ADS414x family with identical pinout and electrical behavior; ADS4125IRGZR is functionally equivalent and drop-in compatible. | No difference - both target identical IF sampling use cases; ADS4145IRGZR is the canonical part number for this variant. | Select ADS4145IRGZR if sourcing from TI's current production line; ADS4125IRGZR remains valid and interchangeable. |
| AD9246BCPZ-125 | 14-bit, 125-MSPS ADC from Analog Devices; uses CMOS-only interface, higher 225 mW power, no LVDS option. | Requires redesign of digital interface and power delivery; lacks LVDS EMI advantage and DFS-configurable output modes. | Choose AD9246BCPZ-125 only when legacy CMOS FPGA interface exists and LVDS is not required. |
Compared with ADS4145IRGZR, ADS4125IRGZR offers identical performance and pin compatibility, while AD9246BCPZ-125 demands interface redesign and increases system power by 47%, making it suitable only for CMOS-centric designs where LVDS is unavailable.
Availability
ADS4125IRGZR is available at Aetrix Electronics and suitable for wireless infrastructure, software-defined radio, and power amplifier linearization applications requiring stable component supply, long-term lifecycle assurance, and industrial temperature grade operation.
Supply support for ADS4125IRGZR 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 ADS41xx product line was designed specifically for ultra-low-power, high-dynamic-range digitization in multi-carrier wireless infrastructure and SDR platforms, emphasizing thermal efficiency and interface flexibility.
FAQ
What is the maximum analog input frequency supported by the ADS4125IRGZR?
The ADS4125IRGZR supports up to 800 MHz maximum analog input frequency when using a 1-VPP differential input amplitude, and up to 400 MHz at 2-VPP. This enables undersampling of RF bands well beyond its 125-MSPS Nyquist limit, making it suitable for direct RF digitization in certain SDR architectures. Performance remains specified per datasheet conditions including proper clock jitter and layout.
Does the ADS4125IRGZR support both LVDS and CMOS output interfaces simultaneously?
No, the ADS4125IRGZR supports either LVDS or CMOS output mode-not both simultaneously. The DFS pin selects the interface type at power-up or during operation; LVDS mode activates differential pairs like D0_D1_P/M, while CMOS mode enables single-ended outputs D0–D13. Mode switching requires reconfiguration via the serial interface and may affect timing alignment.
What is the purpose of the VCM pin on the ADS4125IRGZR?
The VCM pin on the ADS4125IRGZR outputs a stable 0.95-V common-mode voltage used to bias the differential analog input pins (INP/INM). This eliminates the need for external bias networks and ensures optimal ADC core operation. The pin must be decoupled with a 0.1-μF capacitor to AGND close to the device per TI layout recommendations.
How does dynamic power scaling work in the ADS4125IRGZR?
The ADS4125IRGZR automatically reduces power consumption at lower sampling rates (down to 3 MSPS) without sacrificing SNR or SFDR performance. This is achieved through internal clock gating and bias current adjustment in analog and digital sections. No software intervention is required-scaling occurs transparently when the input clock rate decreases.
Is the ADS4125IRGZR pin-compatible with other devices in the ADS41xx family?
Yes, the ADS4125IRGZR shares the same VQFN-48 (RGZ) package and pinout with ADS4145IRGZR, ADS4122IRGZR, and ADS4142IRGZR. Pin functions-including INP/INM, CLKP/CLKM, DFS, OE, and VCM-are identical across these variants. Differences lie only in resolution (12- vs. 14-bit) and maximum sampling rate (65 vs. 125 MSPS), not physical connectivity.
ADS4125IRGZR 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):
- 125M
- 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:
- -
ADS4125IRGZR FAQ
1.How can I place an order for ADS4125IRGZR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS4125IRGZR 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 ADS4125IRGZR reliable?
The price and inventory of ADS4125IRGZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS4125IRGZR is usually 5 days.
3.What payment methods are accepted for ADS4125IRGZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS4125IRGZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS4125IRGZR?
ADS4125IRGZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS4125IRGZR 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 ADS4125IRGZR?
For technical support, including ADS4125IRGZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS4125IRGZR requirements.
6.How does Aetrix verify that ADS4125IRGZR is sourced from the original manufacturer or authorized distributors?
All ADS4125IRGZR 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 ADS4125IRGZR meets industry standards.
7.What is the process for return or replacement of ADS4125IRGZR?
All ADS4125IRGZR units undergo pre-shipment inspection (PSI). If there is an issue with ADS4125IRGZR, 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 ADS4125IRGZR part is unused and in its original packaging.
Return procedure for ADS4125IRGZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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