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Texas Instruments ADS42B49IRGCT
- Part No.:
- ADS42B49IRGCT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
ADS42B49IRGCT.pdf
- Description:
- IC ADC 14BIT PIPELINED 64VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,951
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Product details
Overview
ADS42B49IRGCT from Texas Instruments is a dual-channel, 14-bit, 250-MSPS analog-to-digital converter with integrated analog input buffers, 850-mW total power at full rate, 70.7-dBFS SNR at 170 MHz, and DDR LVDS/CMOS output interface - used in wireless infrastructure baseband receivers for multi-carrier wideband signal digitization.
For engineers reviewing the ADS42B49IRGCT datasheet, ADS42B49IRGCT pinout, ADS42B49IRGCT application, or ADS42B49IRGCT equivalent, this page delivers verified specifications, validated pin functions across LVDS and CMOS modes, real-world dynamic performance data at 170 MHz and 250 MSPS, and confirmed alternative options for high-speed communications ADC selection.
Technical Context
The ADS42B49IRGCT employs differential sampling architecture with on-chip analog input buffers (1.1 kΩ || 2.2 pF at 170 MHz), enabling robust drive capability and wide-bandwidth signal acquisition up to 700 MHz analog input bandwidth. It supports two independent 14-bit ADC cores sharing a common 250-MSPS clock, each with programmable gain (0–6 dB) and DC offset correction.
Dual-output interface flexibility includes DDR LVDS (350 mV or 200 mV swing, 100-Ω termination) and parallel 1.8-V CMOS, with dedicated DRVDD/DRGND supply domains and internal reference generation eliminating external reference pins. Power-down modes are controlled via three digital inputs (CTRL1–CTRL3).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - delivers 16,384 discrete amplitude levels per sample for high-fidelity RF signal capture. |
| Max Sample Rate | 250 MSPS - supports Nyquist-limited instantaneous bandwidth up to 125 MHz per channel. |
| SNR @ 170 MHz | 70.7 dBFS - enables >11.4 ENOB for accurate representation of complex modulated waveforms. |
| SFDR @ 170 MHz | 85 dBc - suppresses spurious content critical for adjacent-channel interference rejection in LTE/WCDMA. |
| Total Power @ 250 MSPS | 850 mW - balances performance and thermal load in dense baseband card layouts. |
| Analog Input Bandwidth | 700 MHz - accommodates direct IF sampling of signals up to 350 MHz without external amplification. |
| Input Buffer Impedance | 1.1 kΩ || 2.2 pF at 170 MHz - simplifies anti-alias filter design and improves impedance matching stability. |
Pinout & Package
ADS42B49IRGCT is housed in a 9.00 mm × 9.00 mm, 64-pin VQFN package (RGC) with exposed thermal pad connected to DRGND. Pin functions differ between LVDS and CMOS interface modes; both configurations share identical physical pin numbering but assign distinct I/O roles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INP_A / INM_A INP_B / INM_B |
Differential analog inputs (Ch A/B) | Accepts 2-VPP differential signals; internally biased by VCM (1.9 V); buffered input reduces drive requirements. |
| CLKP / CLKM | Differential sampling clock input | Accepts 200 mVPP–1.5 VPP sine-wave or LVDS/LVPECL clocks; supports 1–250 MSPS operation. |
| DA0P/M–DA12P/M DB0P/M–DB12P/M |
LVDS output data pairs (Ch A/B) | DDR LVDS outputs multiplexing 14-bit data per channel; 350 mV or 200 mV swing selectable via register. |
| DA0–DA13 / DB0–DB13 | CMOS output data bits (Ch A/B) | Parallel 1.8-V CMOS outputs active only in CMOS mode; unused in LVDS mode (pins repurposed or NC). |
| CTRL1–CTRL3 | Power-mode control inputs | Select global power-down, standby, or active modes; no external pull-up/down required (internal bias provided). |
| VCM | Common-mode voltage output | Provides stable 1.9-V reference for external analog input biasing; capable of sourcing/sinking ±10 mA. |
| AVDD / AVDD_BUF / DRVDD | Independent supply domains | AVDD (1.9 V) powers analog core; AVDD_BUF (3.3 V) powers input buffer; DRVDD (1.8 V) powers digital outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated analog input buffer | Reduces external driver complexity and maintains >85 dB crosstalk at 185 MHz without external termination networks. |
| 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. |
| DC offset correction loop | Automatically cancels channel-specific offset errors (< ±20 mV) without interrupting conversion or requiring calibration cycles. |
| Dual-output interface support | Hardware-selectable LVDS or CMOS mode eliminates need for external level translators or interface adapters. |
| Internal reference generation | Removes external reference IC and decoupling capacitors, reducing BOM count and PCB area in space-constrained designs. |
Applications
| Wireless Base Station Receiver | Software-Defined Radio (SDR) Front End |
|---|---|
Use Scenario: Digitizing multi-carrier LTE/WCDMA signals at IF (185–220 MHz) in macrocell BTS transceivers. IC Role / Device Role / Timing Role: Dual-channel 14-bit ADC capturing simultaneous I/Q paths with <1 ps inter-channel skew and 85 dB crosstalk isolation. Use Value: Enables single-chip digitization of 100+ MHz instantaneous bandwidth while maintaining EVM compliance under 2.5% for 256-QAM. |
Use Scenario: Reconfigurable wideband receiver in military/comms SDR platforms supporting 20–600 MHz tuning range. IC Role / Device Role / Timing Role: High-dynamic-range ADC front end with programmable gain and DC cancellation for adaptive signal conditioning. Use Value: Supports rapid waveform switching without recalibration; 700 MHz analog bandwidth allows direct sampling up to L-band without downconversion. |
| Power Amplifier Linearization | Test & Measurement Digitizer Module |
Use Scenario: Capturing PA output distortion products for digital predistortion (DPD) model training in 5G mMIMO systems. IC Role / Device Role / Timing Role: Dual-channel ADC acquiring feedback path (PA output) and observation path (input) with synchronized sampling. Use Value: 85 dBc SFDR at 170 MHz ensures clean capture of third-order intermodulation products 40 dB below carrier for accurate DPD coefficient extraction. |
Use Scenario: Modular high-speed digitizer card for automated RF test systems requiring 125 MHz real-time bandwidth per channel. IC Role / Device Role / Timing Role: Precision ADC subsystem delivering 11.4 ENOB and low-latency DDR LVDS output to FPGA-based acquisition logic. Use Value: 850 mW power at 250 MSPS enables air-cooled modular design; VQFN-64 package supports high-density layout with thermal pad to DRGND for reliable thermal management. |
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 |
|---|---|---|---|
| ADS42JB49IRGCT | Same pinout and interface; adds JESD204B serial output (subclass 1), removes CMOS interface; 20% higher power (1020 mW). | Required where FPGA/JESD204B receiver compatibility replaces parallel LVDS/CMOS; unsuitable for legacy parallel bus designs. | Select ADS42JB49IRGCT when migrating to JESD204B-based systems; retain ADS42B49IRGCT for cost-sensitive or FPGA-agnostic parallel interfaces. |
| AD9643BCPZ-250 | 14-bit, 250 MSPS, dual-channel; no analog input buffer; requires external 1.8-V reference; 1.25-V CMOS outputs; different pinout (LFCSP-64). | Better SNR (72.2 dBFS @ 170 MHz) but higher analog drive complexity; lacks integrated VCM and buffer impedance matching. | Choose AD9643BCPZ-250 for maximum SNR in well-controlled analog front ends; prefer ADS42B49IRGCT when simplifying anti-alias filter design and reducing system-level component count. |
Compared with ADS42JB49IRGCT, the ADS42B49IRGCT offers lower power and parallel interface flexibility but lacks JESD204B; versus AD9643BCPZ-250, it trades 1.5 dB SNR for integrated buffering and simplified biasing - making it optimal for rapid deployment in wireless infrastructure with constrained analog design resources.
Availability
ADS42B49IRGCT is available at Aetrix Electronics and suitable for wireless infrastructure, software-defined radio, and power amplifier linearization applications requiring stable component supply, long-term industrial temperature support (–40°C to +85°C), and production-ready qualification.
Supply support for ADS42B49IRGCT 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 company specializing in analog and embedded processing technologies, with leadership in high-performance data converters and signal chain solutions.
The ADS42B49IRGCT belongs to TI's ADS42xx ultra-low-power, high-speed ADC family, designed specifically for wideband communications infrastructure where dynamic performance, power efficiency, and analog integration reduce system complexity.
FAQ
What is the maximum analog input frequency supported by the ADS42B49IRGCT?
The ADS42B49IRGCT supports analog input frequencies up to 700 MHz, measured as analog input bandwidth with 50-Ω source and termination. At full-scale 2-VPP differential input, it maintains usable performance up to 400 MHz; with 1.6-VPP input, usable bandwidth extends to 500 MHz. This enables direct IF sampling in many wireless infrastructure applications without additional amplification stages.
Does the ADS42B49IRGCT require an external reference voltage?
No, the ADS42B49IRGCT does not require an external reference voltage. It features fully integrated reference generation, eliminating dedicated reference pins (REFP/REFN) and associated decoupling capacitors. The internal reference is trimmed and stable over temperature, supporting consistent 14-bit linearity without external calibration or component dependencies.
How does the analog input buffer in the ADS42B49IRGCT improve system design?
The analog input buffer in the ADS42B49IRGCT presents a stable 1.1 kΩ || 2.2 pF input impedance at 170 MHz, significantly easing anti-alias filter design and reducing sensitivity to PCB parasitics. It isolates the sampling capacitor from external drive circuitry, enabling use with lower-bandwidth amplifiers and improving crosstalk (>85 dB at 185 MHz) between channels without added shielding or layout constraints.
Can the ADS42B49IRGCT operate in both LVDS and CMOS output modes simultaneously?
No, the ADS42B49IRGCT cannot operate in LVDS and CMOS modes simultaneously. Interface mode is selected at power-up via the RESET and SEN pin states: LVDS mode activates when RESET is low; CMOS mode activates when RESET is high and SEN configures the interface. Pins are physically shared but functionally exclusive - e.g., DA0P/M become DA0/DA1 in CMOS mode, and CLKOUTM is unused in CMOS mode.
What power supply sequencing is recommended for the ADS42B49IRGCT?
Texas Instruments specifies no strict power supply sequencing for the ADS42B49IRGCT. AVDD (1.9 V), AVDD_BUF (3.3 V), and DRVDD (1.8 V) may be powered in any order. However, when AVDD is off, the input clock must be disabled or held below |0.3 V| on CLKP/CLKM to prevent ESD diode conduction. All supplies must meet recommended operating conditions before initiating conversion.
ADS42B49IRGCT 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:
- 1.8V ~ 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:
- -
ADS42B49IRGCT FAQ
1.How can I place an order for ADS42B49IRGCT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS42B49IRGCT 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 ADS42B49IRGCT reliable?
The price and inventory of ADS42B49IRGCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS42B49IRGCT is usually 5 days.
3.What payment methods are accepted for ADS42B49IRGCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS42B49IRGCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS42B49IRGCT?
ADS42B49IRGCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS42B49IRGCT 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 ADS42B49IRGCT?
For technical support, including ADS42B49IRGCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS42B49IRGCT requirements.
6.How does Aetrix verify that ADS42B49IRGCT is sourced from the original manufacturer or authorized distributors?
All ADS42B49IRGCT 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 ADS42B49IRGCT meets industry standards.
7.What is the process for return or replacement of ADS42B49IRGCT?
All ADS42B49IRGCT units undergo pre-shipment inspection (PSI). If there is an issue with ADS42B49IRGCT, 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 ADS42B49IRGCT part is unused and in its original packaging.
Return procedure for ADS42B49IRGCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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