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Texas Instruments ADS4128IRGZR
- Part No.:
- ADS4128IRGZR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ADS4128IRGZR.pdf
- Description:
- IC ADC 12BIT PIPELINED 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,021
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Product details
Overview
ADS4128IRGZR from Texas Instruments is a 12-bit, 200-MSPS analog-to-digital converter (ADC) optimized for wideband communications signal acquisition. It delivers 69 dBFS SNR at 170 MHz input, consumes only 230 mW at full rate on a single 1.8-V supply, and supports DDR LVDS or parallel CMOS output interfaces. It is deployed in multi-carrier base station receivers requiring high dynamic range and ultralow power.
For engineers reviewing the ADS4128IRGZR datasheet, ADS4128IRGZR pinout, ADS4128IRGZR application, or ADS4128IRGZR equivalent, key selection considerations include its 200-MSPS sampling capability, LVDS/CMOS interface flexibility, programmable gain up to 6 dB, DC offset correction loop, and VQFN-48 thermal-pad package for industrial temperature operation (–40°C to 85°C).
Technical Context
The ADS4128IRGZR employs a pipeline ADC architecture with integrated analog input buffers and a digital dc offset correction loop. Its fine-gain control adjusts full-scale input range to optimize SFDR at high frequencies, while dynamic power scaling reduces consumption at lower sampling rates without performance loss.
It supports dual-output modes: DDR LVDS with programmable swing (200 mV or 350 mV) and termination (50 Ω or 100 Ω), and 1.8-V parallel CMOS with 12 individual data lines. Clock inputs accept low-amplitude differential signals down to 200 mVPP, and the device outputs a buffered CLKOUT for synchronous data capture.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - Enables precise digitization of RF/IF signals with 4096 quantization levels. |
| Max Sampling Rate | 200 MSPS - Supports Nyquist bandwidth up to 100 MHz for wideband communication channel capture. |
| SNR @ 170 MHz | 69 dBFS - Delivers >11.2 ENOB for high-fidelity signal reconstruction in demanding SDR applications. |
| Total Power @ 200 MSPS | 230 mW - Achieved via 1.8-V single-supply operation, enabling dense, thermally constrained PCB layouts. |
| Output Interface | DDR LVDS or 1.8-V CMOS - LVDS reduces EMI and enables long trace routing; CMOS simplifies FPGA interfacing. |
| Analog Input Bandwidth | 550 MHz - Allows direct sampling of IF signals up to 170 MHz with minimal amplitude roll-off. |
| Supply Voltage | 1.8 V (AVDD & DRVDD) - Eliminates need for multiple rail generation; compatible with modern low-voltage SoC/FPGA I/O. |
Pinout & Package
ADS4128IRGZR is housed in a 7.00 mm × 7.00 mm VQFN-48 package with exposed thermal pad connected to DRGND. The pinout supports both LVDS and CMOS output configurations, with dedicated analog/digital ground and supply pins for noise isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INP / INM | Differential analog input | Accepts 2-VPP ac-coupled signal; internally biased by VCM (0.95 V) for optimal common-mode operation. |
| CLKP / CLKM | Differential clock input | Supports sine-wave, LVDS, or LVPECL clocks down to 200 mVPP; enables jitter-tolerant sampling at 200 MSPS. |
| D0_D1P / D0_D1M through D10_D11P / D10_D11M | LVDS data output pairs | DDR-multiplexed 12-bit output (6 pairs); each pair carries two consecutive samples per clock cycle. |
| CLKOUTP / CLKOUTM | Differential output clock | Phase-aligned LVDS clock synchronized to DDR data edges-critical for timing-critical FPGA capture. |
| VCM | Common-mode voltage output | Provides stable 0.95-V reference for external input biasing; eliminates need for precision external resistors. |
| DFS | Data format select | Configures output data format (twos complement or offset binary) and selects LVDS vs. CMOS interface mode. |
| OE | Output enable | Active-high control with internal 180-kΩ pull-up; allows dynamic output gating to reduce system-level EMI or power. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic power scaling | Automatically reduces digital power at lower sampling rates-no firmware intervention required; maintains full performance. |
| Programmable gain (0–6 dB) | Improves SFDR by 3–5 dB at high input frequencies (e.g., 170 MHz) when full-scale range is reduced. |
| DC offset correction loop | Compensates for internal ADC offset in real time; eliminates need for external calibration circuitry or software correction. |
| Low-input-clock-amplitude support | Operates reliably with 200 mVPP differential clock-reduces clock driver power and simplifies clock tree design. |
| LVDS output programmability | Selectable swing (200 mV or 350 mV) and termination (50 Ω or 100 Ω) enables optimization for signal integrity or power trade-offs. |
Applications
| Wireless Base Station Receiver | Software-Defined Radio (SDR) Front End |
|---|---|
Use Scenario: Digitizing multi-carrier LTE/WCDMA IF signals at 122.88 MSPS or higher in macrocell BTS. IC Role / Device Role / Timing Role: Primary wideband ADC capturing 20+ MHz instantaneous bandwidth with <69 dBFS SNR at 170 MHz. Use Value: Enables high-order modulation (256-QAM) demodulation with minimal quantization noise impact on EVM. |
Use Scenario: Real-time spectrum analysis and adaptive waveform processing in field-deployable SDR platforms. IC Role / Device Role / Timing Role: High-speed digitizer feeding FPGA-based FFT engines and digital downconverters. Use Value: 200-MSPS rate and low latency (10 clock cycles) allow sub-5 µs processing pipeline response. |
| Power Amplifier Linearization | Test & Measurement Instrumentation |
Use Scenario: Capturing PA output distortion products for digital predistortion (DPD) coefficient calculation. IC Role / Device Role / Timing Role: High-SFDR (85 dBc) ADC acquiring adjacent-channel leakage and intermodulation components. Use Value: 85 dBc SFDR at 170 MHz ensures accurate capture of –50 dBc distortion tones without spurious masking. |
Use Scenario: Embedded digitizer in portable signal analyzers requiring wide dynamic range and low power. IC Role / Device Role / Timing Role: Core acquisition engine supporting >100 MHz real-time bandwidth with calibrated ENOB >11.2 bits. Use Value: 230-mW total power enables battery-operated handheld instruments with >2-hour runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS4149IRGZT | 14-bit resolution, 250 MSPS, higher power (480 mW), same VQFN-48 package. | Better SNR/SFDR for narrowband high-precision measurement; overkill for 12-bit system cost targets. | Choose ADS4149IRGZT when ENOB >12.5 bits is mandatory and power budget allows +250 mW. |
| ADS58B19IRGZT | 9-bit, 250 MSPS, 300 mW, optimized for ultra-low-latency (<5-cycle) DPD feedback loops. | Lower resolution but faster settling; suited for closed-loop real-time correction, not wideband analysis. | Choose ADS58B19IRGZT only when latency <5 ns and 9-bit fidelity suffice for adaptive control loops. |
Compared with ADS4128IRGZR, ADS4149IRGZT trades power and cost for 2-bit resolution uplift and wider bandwidth, while ADS58B19IRGZT sacrifices resolution and dynamic range for minimal latency-neither is pin-compatible, and all require distinct layout and power delivery design.
Availability
ADS4128IRGZR is available at Aetrix Electronics and suitable for wireless infrastructure, software-defined radio, and power amplifier linearization applications requiring stable component supply across extended product lifecycles.
Supply support for ADS4128IRGZR 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, communications, and automotive systems.
The ADS4128IRGZR belongs to TI's high-speed ADC portfolio designed specifically for wideband communications infrastructure-emphasizing ultralow power, high SFDR, and flexible digital interfacing in compact packages.
FAQ
What is the maximum analog input frequency supported by the ADS4128IRGZR?
The ADS4128IRGZR supports analog input frequencies up to 400 MHz with a 2-VPP input amplitude and up to 800 MHz with a 1-VPP amplitude, enabled by its 550-MHz analog input bandwidth. This allows direct sampling of IF signals in cellular infrastructure and radar front ends without external downconversion.
Does the ADS4128IRGZR support both LVDS and CMOS output interfaces simultaneously?
No-the ADS4128IRGZR supports either LVDS or CMOS output mode, selected via the DFS pin. In LVDS mode, it outputs DDR-multiplexed data on six differential pairs; in CMOS mode, it drives 12 single-ended 1.8-V data lines. The interface must be configured at power-up and cannot be dynamically switched during operation.
What is the purpose of the VCM pin on the ADS4128IRGZR?
The VCM pin on the ADS4128IRGZR outputs a stable 0.95-V common-mode voltage used to bias the differential analog input (INP/INM). This eliminates the need for external resistor dividers or precision references, simplifying board design and improving input stage matching and noise immunity.
How does the ADS4128IRGZR achieve ultralow power at 200 MSPS?
The ADS4128IRGZR achieves 230 mW total power at 200 MSPS through 1.8-V single-supply operation, optimized pipeline architecture, and dynamic power scaling. At lower sampling rates, internal circuitry automatically reduces current draw without degrading SNR or SFDR-enabling energy-efficient operation across variable-rate systems.
Is the ADS4128IRGZR pin-compatible with other devices in the ADS412x family?
Yes-the ADS4128IRGZR shares the same VQFN-48 (RGZ) package and pinout with ADS4122, ADS4125, ADS4126, and ADS4129. This enables drop-in replacement within the family for sampling rate or resolution adjustments, provided the application's SNR, SFDR, and power requirements align with the selected variant.
ADS4128IRGZR 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):
- 200M
- 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:
- -
ADS4128IRGZR FAQ
1.How can I place an order for ADS4128IRGZR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS4128IRGZR 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 ADS4128IRGZR reliable?
The price and inventory of ADS4128IRGZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS4128IRGZR is usually 5 days.
3.What payment methods are accepted for ADS4128IRGZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS4128IRGZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS4128IRGZR?
ADS4128IRGZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS4128IRGZR 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 ADS4128IRGZR?
For technical support, including ADS4128IRGZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS4128IRGZR requirements.
6.How does Aetrix verify that ADS4128IRGZR is sourced from the original manufacturer or authorized distributors?
All ADS4128IRGZR 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 ADS4128IRGZR meets industry standards.
7.What is the process for return or replacement of ADS4128IRGZR?
All ADS4128IRGZR units undergo pre-shipment inspection (PSI). If there is an issue with ADS4128IRGZR, 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 ADS4128IRGZR part is unused and in its original packaging.
Return procedure for ADS4128IRGZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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