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Texas Instruments ADS4249IRGCT
- Part No.:
- ADS4249IRGCT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
ADS4249IRGCT.pdf
- Description:
- IC ADC 14BIT PIPELINED 64VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:172
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Product details
Overview
ADS4249IRGCT from Texas Instruments is a dual-channel, 14-bit, 250-MSPS analog-to-digital converter (ADC) optimized for wideband wireless infrastructure and software-defined radio systems. It operates from a single 1.8-V supply, consumes 560 mW total power at full rate, delivers 71.7-dBFS SNR and 80-dBc SFDR at 170 MHz input, and supports differential analog inputs with 0.95-V common-mode output.
For engineers reviewing the ADS4249IRGCT datasheet, ADS4249IRGCT pinout, ADS4249IRGCT application, or ADS4249IRGCT equivalent, this page provides verified technical context, validated LVDS/CMOS interface specifications, confirmed 64-pin VQFN package mapping, and real-world RF receiver and digital predistortion use cases - all grounded in TI's SBAS534E production data sheet.
Technical Context
The ADS4249IRGCT employs a time-interleaved dual-channel architecture with independent sampling circuits per channel and integrated DC offset correction loops. Its internal reference eliminates external reference pins, and programmable gain up to +6 dB enables SNR/SFDR trade-off tuning without hardware changes.
It supports two configurable digital output interfaces: DDR LVDS (350-mV or 200-mV swing) and parallel CMOS (14-bit per channel), both selectable via serial register control. Clocking includes differential CLKP/CLKM input and complementary LVDS CLKOUTP/CLKOUTM or single-ended CMOS CLKOUT output, with aperture jitter of 140 fs rms and latency of 16–24 clock cycles depending on mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - delivers 16,384 discrete amplitude levels for high-fidelity RF signal digitization |
| Max Sampling Rate | 250 MSPS - supports Nyquist bandwidth up to 125 MHz per channel for multi-carrier LTE/WiMAX baseband capture |
| SNR @ 170 MHz | 71.7 dBFS - enables >11.4 effective bits (ENOB) in wideband receiver front-ends |
| SFDR @ 170 MHz | 80 dBc - suppresses spurious tones critical for adjacent-channel interference mitigation in transceiver feedback paths |
| Total Power @ 250 MSPS | 560 mW - split as 342 mW analog (AVDD) and 288 mW digital (DRVDD), enabling thermal design with RθJA = 23.9°C/W |
| Analog Input Bandwidth | 550 MHz - allows direct RF sampling of sub-3-GHz bands with minimal external filtering |
| Input Common-Mode Voltage | 0.95 V - fixed internal VCM output simplifies AC-coupled differential driver biasing |
Pinout & Package
The ADS4249IRGCT is housed in a 9.0 mm × 9.0 mm, 64-pin VQFN (RGC) package with exposed thermal pad connected to DRGND. Pin functions differ between LVDS and CMOS interface modes; LVDS mode uses differential data pairs (DA0P/DA0M through DA12P/DA12M and DB0P/DB0M through DB12P/DB12M), while CMOS mode uses single-ended outputs (DA0–DA13, DB0–DB13).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INP_A / INM_A INP_B / INM_B |
Differential analog input (Ch A/B) | Accepts 2-VPP differential signals; internally biased to 0.95-V common-mode; 550-MHz bandwidth supports direct RF sampling |
| CLKP / CLKM | Differential clock input | Accepts low-amplitude clocks down to 200 mVPP; supports 1–250 MSPS with 35%–65% duty cycle tolerance |
| DA0P/DA0M – DA12P/DA12M DB0P/DB0M – DB12P/DB12M |
LVDS data outputs (Ch A/B) | DDR LVDS pairs delivering multiplexed 14-bit samples; 350-mV or 200-mV programmable swing reduces EMI and power |
| CLKOUTP / CLKOUTM | Differential output clock (LVDS) | Phase-aligned, low-jitter clock replica for synchronous data capture in FPGA-based receivers |
| VCM | Common-mode voltage output | Provides stable 0.95-V reference for external analog driver biasing; eliminates need for external resistor divider |
| CTRL1–CTRL3 | Digital control inputs | Select power-down modes (standby, global shutdown) and interface configuration without serial register access |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power at 250 MSPS | 560 mW total consumption enables dense ADC arrays in compact 5G remote radio units without forced air cooling |
| Integrated DC offset correction | On-chip loop cancels channel-specific DC offsets in real time, eliminating manual calibration in closed-loop linearization systems |
| Programmable gain (0–6 dB) | Adjusts full-scale range dynamically to optimize SFDR vs. SNR based on instantaneous signal conditions |
| Internal reference generation | Removes external reference IC and decoupling capacitors, reducing BOM count and PCB area by ~12 components |
| LVDS/CMOS interface selectability | Hardware- or register-controlled output mode selection allows reuse across FPGA (LVDS) and ASIC (CMOS) platforms |
Applications
| Wireless Base Station Receiver | Digital Predistortion Feedback Path |
|---|---|
|
Use Scenario: Digitizing downconverted LTE/FDD/TDD signals in macrocell and massive MIMO active antenna systems. IC Role / Device Role / Timing Role: Dual-channel ADC capturing I/Q baseband streams at 2× oversampling for 100-MHz channel bandwidths. Use Value: 71.7-dBFS SNR and 80-dBc SFDR ensure clean spectral reconstruction and low EVM in 256-QAM demodulation. |
Use Scenario: Capturing PA output for real-time digital predistortion (DPD) coefficient adaptation in 5G NR transmitters. IC Role / Device Role / Timing Role: High-speed feedback ADC synchronizing with transmit DAC via shared CLKOUT, enabling <100-ns loop latency. Use Value: 250-MSPS sampling and 16-cycle fixed latency allow DPD update rates exceeding 15 kHz for dynamic envelope tracking. |
| Software Defined Radio (SDR) Front-End | High-Speed Test Equipment Capture |
|
Use Scenario: Wideband spectrum monitoring and signal intelligence (SIGINT) receivers covering 10 MHz–3 GHz. IC Role / Device Role / Timing Role: Direct RF sampling ADC using 550-MHz analog input bandwidth to eliminate image-reject mixers and IF stages. Use Value: 0.95-V VCM output and 2-VPP input range simplify interfacing with baluns and broadband amplifiers across frequency bands. |
Use Scenario: Digitizing transient waveforms in automated test equipment (ATE) for semiconductor characterization. IC Role / Device Role / Timing Role: Dual-channel acquisition engine capturing simultaneous voltage/current waveforms with matched aperture delay (<±70 ps). Use Value: Channel-to-channel crosstalk >95 dB prevents measurement coupling errors during high-precision parametric testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, 14-bit, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS4246IRGCT | Lower max sampling rate (160 MSPS); same 14-bit resolution, VQFN-64 package, and LVDS/CMOS interface options | Better suited for cost-sensitive 4G LTE small cells where 125-MHz Nyquist bandwidth suffices | Select when system clock rate and power budget permit reduced speed; pin-compatible but requires firmware clock scaling |
| ADS54J60IRFCR | 16-bit resolution, 500-MSPS, JESD204B serial interface, 72-pin VQFN; higher power (1.4 W), no internal reference | Targets high-end radar and wideband test equipment requiring >12 ENOB and deterministic latency | Choose for JESD204B FPGA integration and extended dynamic range; not pin- or register-compatible with ADS4249IRGCT |
Compared with ADS4249IRGCT, ADS4246IRGCT trades 90 MSPS for lower power and cost in mid-tier wireless infrastructure, while ADS54J60IRFCR replaces parallel LVDS/CMOS with JESD204B to support higher throughput and tighter synchronization - requiring PCB redesign and new FPGA IP.
Availability
ADS4249IRGCT is available at Aetrix Electronics and suitable for wireless infrastructure, digital predistortion feedback, and SDR front-end designs requiring stable component supply, long-term industrial temperature support (–40°C to +85°C), and qualified high-reliability sourcing.
Supply support for ADS4249IRGCT 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 and embedded processing technologies, with decades of leadership in high-performance data converters for communications and industrial markets.
The ADS4249IRGCT belongs to TI's ADS42xx ultralow-power dual-channel ADC family, designed specifically for multi-carrier, wide-bandwidth wireless communications infrastructure where power efficiency and dynamic performance are co-optimized.
FAQ
What is the maximum sampling rate supported by the ADS4249IRGCT?
The ADS4249IRGCT supports a maximum sampling rate of 250 MSPS in both LVDS and CMOS output modes. This rate is fully characterized across the industrial temperature range (–40°C to +85°C) with AVDD and DRVDD at 1.8 V. At lower sampling frequencies, the device maintains its 14-bit resolution and dynamic performance metrics, and power consumption scales proportionally - for example, digital power drops to ~169 mW in CMOS mode at 2.5 MHz input.
Does the ADS4249IRGCT require an external reference voltage?
No, the ADS4249IRGCT does not require an external reference voltage. It integrates an internal reference generator that eliminates traditional REFN/REFP pins and associated decoupling capacitors. The device provides a dedicated VCM pin that outputs a stable 0.95-V common-mode voltage for analog input biasing. External reference support is explicitly not implemented - per TI SBAS534E Table 1, "EXTERNAL REFERENCE: Not supported" for ADS4249IRGCT.
What are the key differences between LVDS and CMOS output modes on the ADS4249IRGCT?
The ADS4249IRGCT supports two mutually exclusive digital output interfaces: DDR LVDS (differential pairs like DA0P/DA0M) and parallel CMOS (single-ended signals like DA0–DA13). LVDS mode offers lower power (288 mW vs. 169 mW CMOS at 2.5 MHz), better noise immunity, and programmable swing (200 mV or 350 mV), while CMOS mode simplifies FPGA interfacing with standard logic levels and eliminates termination resistors. Mode selection is controlled via serial registers or hardware pins CTRL1–CTRL3.
How is channel-to-channel crosstalk specified for the ADS4249IRGCT?
The ADS4249IRGCT specifies channel-to-channel crosstalk as >90 dB at 185 MHz and >95 dB at 170 MHz, measured with full-scale signals applied to one channel while observing noise floor degradation on the other. This performance is achieved through physical isolation of analog input paths (INP_A/INM_A vs. INP_B/INM_B), separate sampling circuits, and differential signaling - making it suitable for I/Q sampling and phase-coherent multi-channel systems where inter-channel leakage must be minimized.
Is the ADS4249IRGCT pin-compatible with any prior-generation TI ADCs?
Yes, the ADS4249IRGCT is pin-compatible with the ADS62P49, enabling migration within existing PCB layouts. However, key electrical and functional differences exist: ADS4249IRGCT uses 1.8-V AVDD (vs. 3.3 V for ADS62P49), has VCM = 0.95 V (vs. 1.5 V), and repurposes pins 22 (AVDD instead of NC), 38/58 (NC instead of DRVDD), and 39/59 (NC instead of DRGND). These changes require schematic updates to power distribution and grounding, even though footprint remains identical.
ADS4249IRGCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 250M
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- LVDS - Parallel, Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- Architecture:
- Pipelined
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 1.7V ~ 1.9V
- Voltage - Supply, Digital:
- 1.7V ~ 1.9V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 64-VQFN (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS4249IRGCT FAQ
1.How can I place an order for ADS4249IRGCT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS4249IRGCT 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 ADS4249IRGCT reliable?
The price and inventory of ADS4249IRGCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS4249IRGCT is usually 5 days.
3.What payment methods are accepted for ADS4249IRGCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS4249IRGCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS4249IRGCT?
ADS4249IRGCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS4249IRGCT 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 ADS4249IRGCT?
For technical support, including ADS4249IRGCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS4249IRGCT requirements.
6.How does Aetrix verify that ADS4249IRGCT is sourced from the original manufacturer or authorized distributors?
All ADS4249IRGCT 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 ADS4249IRGCT meets industry standards.
7.What is the process for return or replacement of ADS4249IRGCT?
All ADS4249IRGCT units undergo pre-shipment inspection (PSI). If there is an issue with ADS4249IRGCT, 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 ADS4249IRGCT part is unused and in its original packaging.
Return procedure for ADS4249IRGCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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