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Texas Instruments ADS42B49IRGC25
- Part No.:
- ADS42B49IRGC25
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
ADS42B49IRGC25.pdf
- Description:
- IC ADC 14BIT PIPELINED 64VQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ADS42B49IRGC25 from Texas Instruments is a dual-channel, 14-bit, 250-MSPS analog-to-digital converter with integrated analog input buffers, designed for high-frequency signal acquisition in wideband communications systems. It delivers 70.7-dBFS SNR at 170 MHz, 85-dBc SFDR at 170 MHz, and ultralow 850-mW total power consumption at full rate, enabling high-fidelity digitization in wireless infrastructure baseband receivers.
For engineers reviewing the ADS42B49IRGC25 datasheet, ADS42B49IRGC25 pinout, ADS42B49IRGC25 application, or ADS42B49IRGC25 equivalent, key selection considerations include its dual-channel 14-bit resolution, 250-MSPS sampling capability, LVDS/CMOS output interface flexibility, integrated analog input buffer (1.1 kΩ || 2.2 pF at 170 MHz), and VQFN-64 (9 mm × 9 mm) package with thermal pad.
Technical Context
The ADS42B49IRGC25 employs a pipeline ADC architecture with on-chip analog input buffers that isolate the sampling core from source impedance variations, enabling stable performance up to 700 MHz analog input bandwidth. Its dual-channel design supports time-interleaved or independent channel operation with >85 dB crosstalk suppression at 185 MHz.
It supports two digital output modes: DDR LVDS with programmable swing (200 mV or 350 mV) and parallel CMOS (1.8 V), both configurable via serial interface or hardware pins (CTRL1–CTRL3). The device includes DC offset correction, programmable gain (0–6 dB), and internal references-eliminating external reference components and decoupling capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - Enables precise quantization of wide dynamic range RF/baseband signals without dithering. |
| Max Sampling Rate | 250 MSPS - Supports Nyquist sampling of signals up to 125 MHz or undersampling of IF signals up to 400 MHz (2-VPP input). |
| SNR @ 170 MHz | 70.7 dBFS - Delivers >11.4 ENOB for high-fidelity digitization of multi-carrier LTE/WCDMA waveforms. |
| SFDR @ 170 MHz | 85 dBc - Ensures clean spectral representation with minimal spurious content in dense signal environments. |
| Total Power @ 250 MSPS | 850 mW - Achieves ultralow power per channel (425 mW) for thermally constrained small-cell and remote radio head designs. |
| Analog Input Buffer | 1.1 kΩ || 2.2 pF at 170 MHz - Simplifies driver stage design by reducing sensitivity to PCB trace impedance and layout parasitics. |
| Digital Interface | DDR LVDS (350 mV or 200 mV swing) or 1.8-V CMOS - Provides noise-immune high-speed data transfer or direct FPGA connection without level-shifting. |
Pinout & Package
ADS42B49IRGC25 is housed in a 9.00 mm × 9.00 mm, 64-pin Quad Flat No-Lead (VQFN) package with exposed thermal pad connected to DRGND. Pin functions differ between LVDS and CMOS output modes; LVDS mode uses differential data pairs (DA0P/M through DA12P/M and DB0P/M through DB12P/M), 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 inputs (Channel A/B) | Accepts 2-VPP differential signals; buffered input simplifies anti-alias filter and driver amplifier design. |
| CLKP / CLKM | Differential clock input | Supports low-amplitude clocks down to 200 mVPP; enables use with low-power clock generators or transformer-coupled sources. |
| DA0P/M – DA12P/M DB0P/M – DB12P/M |
Dual-channel DDR LVDS data outputs | Each pair carries multiplexed 14-bit data (D0–D13); requires 100-Ω differential termination for proper signal integrity. |
| VCM | Common-mode voltage output | Provides 1.9-V reference for external biasing of analog input networks-no external resistor divider needed. |
| CTRL1–CTRL3 | Power-down mode control | Selects global power-down, channel-specific shutdown, or standby states-critical for dynamic power management in burst-mode systems. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated analog input buffer | Reduces analog front-end complexity by eliminating need for high-bandwidth, low-output-impedance drivers; maintains >85 dB crosstalk up to 185 MHz. |
| Programmable gain (0–6 dB) | Optimizes SFDR/SNR trade-off: +3 dB gain improves SFDR by ~4 dB at 170 MHz while reducing SNR by ~0.2 dB-ideal for low-level signal capture. |
| DC offset correction loop | Automatically nulls channel-specific DC offsets within one clock cycle, preserving baseband signal integrity in zero-IF architectures. |
| Internal voltage reference | Removes external reference IC and associated decoupling capacitors-reducing BOM count and PCB area in space-constrained modules. |
| LVDS swing selection | Configurable 200 mV (low-power) or 350 mV (noise margin) output swing allows optimization for system-level EMI and timing budget requirements. |
Applications
| Wireless Base Station Receiver | Software-Defined Radio (SDR) Front End |
|---|---|
Use Scenario: Digitizing multi-carrier LTE, WCDMA, and GSM signals in macro/micro base station transceivers. IC Role / Device Role / Timing Role: Dual-channel ADC capturing I/Q baseband or IF signals at 250 MSPS with synchronized sampling and <1 ps channel skew. Use Value: 85-dBc SFDR ensures adjacent channel leakage ratio (ACLR) compliance; 850-mW power enables dense, fanless RRH deployment. |
Use Scenario: Reconfigurable wideband receiver supporting multiple air interfaces (LTE, 5G NR, WiMAX) via FPGA-based digital processing. IC Role / Device Role / Timing Role: High-resolution, high-speed digitizer providing 14-bit samples to FPGA fabric for real-time FFT, filtering, and demodulation. Use Value: Programmable gain and DC offset correction allow adaptive signal conditioning across varying modulation schemes and input levels. |
| Power Amplifier Linearization | Test & Measurement Instrumentation |
Use Scenario: Capturing PA output distortion products for digital predistortion (DPD) algorithm training in active antenna systems. IC Role / Device Role / Timing Role: High-SFDR ADC acquiring wide instantaneous bandwidth (up to 400 MHz) of PA output to resolve third-order intermodulation products. Use Value: >85 dB crosstalk prevents channel coupling artifacts during dual-path DPD calibration; 700 MHz analog bandwidth supports direct RF sampling. |
Use Scenario: Embedded digitizer in vector signal analyzers and spectrum monitoring equipment requiring high dynamic range and low noise floor. IC Role / Device Role / Timing Role: Precision ADC subsystem delivering calibrated 14-bit samples with <0.005 %/°C gain drift for metrology-grade measurements. Use Value: Internal reference and DC offset correction reduce calibration overhead; 70.7-dBFS SNR enables sub-100 µV RMS noise floor at 170 MHz. |
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 |
|---|---|---|---|
| ADS42JB49IRGC25 | Same pinout and architecture but rated for extended temperature (–55°C to 125°C); higher AVDD_BUF max (3.6 V); identical electrical specs at 250 MSPS. | Required for aerospace, defense, or under-hood automotive applications where industrial temp range is insufficient. | Select ADS42JB49IRGC25 only when extended temperature operation or higher AVDD_BUF margin is mandatory. |
| ADS42LB49IRGC25 | Lower power variant: 650 mW total at 250 MSPS (vs. 850 mW); reduced SNR (69.5 dBFS) and SFDR (82 dBc) at 170 MHz; same 14-bit resolution and VQFN-64 package. | Suitable for battery-powered SDR or portable test equipment where thermal headroom or power budget is constrained. | Choose ADS42LB49IRGC25 when power reduction outweighs 1.2 dB SNR and 3 dB SFDR degradation in the target application. |
Compared with ADS42B49IRGC25, ADS42JB49IRGC25 offers extended temperature reliability without performance trade-offs, while ADS42LB49IRGC25 sacrifices dynamic range for significant power savings-enabling differentiated design choices across ruggedized, portable, and cost-optimized deployments.
Availability
ADS42B49IRGC25 is available at Aetrix Electronics and suitable for wireless infrastructure, software-defined radio, and power amplifier linearization applications requiring stable component supply, long-term production continuity, and traceable sourcing from authorized channels.
Supply support for ADS42B49IRGC25 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 ADS42B49IRGC25 belongs to TI's high-speed ADC portfolio, engineered specifically for wideband, low-power digitization in multi-carrier wireless infrastructure and reconfigurable radio systems.
FAQ
What is the maximum analog input frequency supported by the ADS42B49IRGC25?
The ADS42B49IRGC25 supports a maximum analog input frequency of 400 MHz with a 2-VPP input amplitude and 500 MHz with a 1.6-VPP input amplitude, enabled by its 700 MHz analog input bandwidth and buffered front end. This allows direct undersampling of IF signals in cellular infrastructure and radar applications without intermediate frequency translation stages.
Does the ADS42B49IRGC25 require an external voltage reference?
No, the ADS42B49IRGC25 does not require an external voltage reference. It integrates a precision internal reference, eliminating the need for external reference ICs and associated decoupling capacitors. This reduces system BOM count, PCB area, and calibration complexity while maintaining specified DC accuracy over temperature.
How does the analog input buffer in the ADS42B49IRGC25 improve system design?
The analog input buffer in the ADS42B49IRGC25 presents a stable 1.1 kΩ || 2.2 pF load at 170 MHz, decoupling the ADC core from PCB layout parasitics and driver amplifier output impedance. This simplifies anti-alias filter design, improves channel-to-channel isolation (>85 dB crosstalk), and enables reliable performance across varied board stackups and signal chain configurations.
Can the ADS42B49IRGC25 operate in both LVDS and CMOS output modes simultaneously?
No, the ADS42B49IRGC25 operates in either LVDS or CMOS output mode-not both simultaneously. Mode selection is controlled via the RESET, SEN, and SCLK pins during power-up or through the serial interface. LVDS mode uses differential data pairs (e.g., DA0P/M), while CMOS mode uses single-ended outputs (DA0–DA13), with pin assignments differing between modes as defined in the datasheet.
What is the purpose of the VCM pin on the ADS42B49IRGC25?
The VCM pin on the ADS42B49IRGC25 outputs a stable 1.9-V common-mode voltage used to bias the differential analog input pairs (INP_A/INM_A and INP_B/INM_B). This eliminates the need for external resistive dividers or op-amp buffers, simplifying input network design and ensuring optimal common-mode rejection across temperature and process variation.
ADS42B49IRGC25 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 1.8V ~ 2V
- Voltage - Supply, Digital:
- 1.7V ~ 2V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 64-VQFN (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS42B49IRGC25 FAQ
1.How can I place an order for ADS42B49IRGC25 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS42B49IRGC25 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 ADS42B49IRGC25 reliable?
The price and inventory of ADS42B49IRGC25 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS42B49IRGC25 is usually 5 days.
3.What payment methods are accepted for ADS42B49IRGC25?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS42B49IRGC25 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS42B49IRGC25?
ADS42B49IRGC25 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS42B49IRGC25 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 ADS42B49IRGC25?
For technical support, including ADS42B49IRGC25 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS42B49IRGC25 requirements.
6.How does Aetrix verify that ADS42B49IRGC25 is sourced from the original manufacturer or authorized distributors?
All ADS42B49IRGC25 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 ADS42B49IRGC25 meets industry standards.
7.What is the process for return or replacement of ADS42B49IRGC25?
All ADS42B49IRGC25 units undergo pre-shipment inspection (PSI). If there is an issue with ADS42B49IRGC25, 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 ADS42B49IRGC25 part is unused and in its original packaging.
Return procedure for ADS42B49IRGC25:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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