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Texas Instruments ONET2511PARGT
- Part No.:
- ONET2511PARGT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
ONET2511PARGT.pdf
- Description:
- IC LIMITING 1 CIRCUIT 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,753
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Product details
Overview
ONET2511PARGT from Texas Instruments is a 2.5-Gbps ultralow power limiting amplifier for fiber-optic receivers, delivering 50 dB gain, 3 mVp−p input sensitivity, and CML differential outputs. It operates from a single 3.3-V supply across –40°C to 85°C and supports SONET OC48, Fibre Channel 2.125 Gbps, and Gigabit Ethernet.
For engineers reviewing the ONET2511PARGT datasheet, ONET2511PARGT pinout, ONET2511PARGT application, or ONET2511PARGT equivalent, key selection factors include input dynamic range (3–1200 mVp−p), deterministic jitter (9.3–30 psp−p at 2.5 Gbps), output polarity control, and offset cancellation with configurable low-frequency cutoff.
Technical Context
The ONET2511PARGT integrates a three-stage high-speed data path with on-chip 50-Ω input termination to VCC and 50-Ω CML output back-termination to VCCO. Its offset cancellation loop-tunable via COC1/COC2 pins-supports low-frequency cutoffs down to 0.8 kHz with external 2.2-nF capacitor or 45 kHz with internal filtering.
It features independent CMOS-controlled functions: DISABLE pin disables the CML output stage in <20 ns, and OUTPOL selects output polarity with internal pull-up. The device uses an on-chip bandgap reference and bias generation circuitry, requiring only one 3.3-V ±10% supply for both core (VCC) and output stage (VCCO).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | Up to 2.5 Gbps - supports OC48, 2.125-Gbps Fibre Channel, and Gigabit Ethernet physical layer recovery |
| Input sensitivity | 3 mVp−p (min) - enables reliable signal recovery from low-amplitude photodiode outputs |
| Input overload | 1200 mVp−p - maintains low-jitter operation under large-swing transient conditions |
| Differential output swing | 600–1200 mVp−p - ensures robust interfacing with downstream CML logic or clock-data recovery circuits |
| Supply current | 22–28 mA - ultralow power consumption for high-density optical line card designs |
| Deterministic jitter | 9.3–30 psp−p at 2.5 Gbps - meets SONET/SDH BER <10−10 timing budget requirements |
| Low-frequency −3-dB bandwidth | 45 kHz (internal) or 0.8 kHz (with 2.2-nF external cap) - configurable for AC-coupled front-end compatibility |
Pinout & Package
The ONET2511PARGT is housed in a 3 mm × 3 mm, 16-pin QFN package with 0.5-mm lead pitch and exposed thermal pad (EP) requiring grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (pins 1, 4) | Core supply input | 3.3-V ±10% supply for amplifier core; provides on-chip 50-Ω termination for DIN+/DIN− |
| DIN+, DIN− (pins 2, 3) | Differential analog input | High-impedance, internally terminated 50-Ω inputs accepting 3–1200 mVp−p signals |
| DISABLE (pin 6) | CMOS enable control | Active-high logic disables CML output stage within 20 ns; reduces power during idle periods |
| OUTPOL (pin 9) | Polarity select input | CMOS-level control (internally pulled up) to invert DOUT+/DOUT− output phase |
| DOUT+, DOUT− (pins 10, 11) | Differential CML output | 50-Ω back-terminated outputs driving downstream CDR or multiplexer with 600–1200 mVp−p swing |
| VCCO (pin 12) | Output stage supply | Separate 3.3-V ±10% rail for CML buffer; isolates output noise from core supply |
| COC1, COC2 (pins 14, 15) | Offset cancellation filter | Analog nodes for external capacitor connection (e.g., 2.2 nF) to extend low-frequency response to 0.8 kHz |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow power consumption | 22–28 mA supply current at 3.3 V enables thermal management in dense optical modules |
| Input offset cancellation | Adjustable loop via COC1/COC2 pins eliminates DC drift-induced baseline wander in long-haul links |
| High input dynamic range | 3–1200 mVp−p tolerance allows use with varying photodiode responsivities and post-amplifier gains |
| Output polarity select | Hardware-configurable inversion avoids PCB-level signal routing changes in multi-channel designs |
| CML data outputs | Differential 50-Ω back-terminated outputs ensure impedance-matched interconnect to standard CDR ICs |
Applications
| SONET/SDH OC48 Receivers | Fibre Channel 2.125-Gbps Receivers |
|---|---|
Use Scenario: Recovering 2.488-Gbps serial data from APD-based optical front-ends in metro DWDM line cards. IC Role / Device Role / Timing Role: Limiting amplifier providing gain, amplitude equalization, and jitter reduction prior to CDR. Use Value: 50 dB gain and 3 mVp−p sensitivity enable detection of weak signals after long-haul fiber attenuation. | Use Scenario: Signal conditioning in storage area network (SAN) host bus adapters receiving 2.125-Gbps FC frames. IC Role / Device Role / Timing Role: High-fidelity limiting stage restoring signal integrity before deserialization. Use Value: Deterministic jitter <30 psp−p at 2.5 Gbps ensures compliance with Fibre Channel Class 3 timing budgets. |
| Gigabit Ethernet Receivers | Optical Network Test Equipment |
Use Scenario: Front-end amplification in SFP transceivers compliant with IEEE 802.3z for 1.25-Gbps data recovery. IC Role / Device Role / Timing Role: Limiting amplifier converting low-swing photodiode current to full-swing CML logic for PHY interface. Use Value: Single 3.3-V supply and 3 mm × 3 mm QFN footprint support compact, cost-effective SFP module designs. | Use Scenario: Signal regeneration in bit-error-rate testers (BERTs) and optical eye diagram analyzers. IC Role / Device Role / Timing Role: Stable, low-jitter amplification stage preserving waveform fidelity during high-speed test signal analysis. Use Value: 1200 mVp−p overload capability accommodates variable test signal amplitudes without saturation or distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar limiting amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3761ATA+ | Higher supply current (35 mA), fixed 3.3-V-only operation, no COC tuning; 2.5-Gbps rated | Lacks programmable offset cancellation and output polarity control; optimized for simpler FC/GbE systems | Select when board space permits larger 5 mm × 5 mm TQFN and design does not require low-frequency cutoff adjustment |
| SY88303BLKG | Wider data rate range (155 Mbps–3.2 Gbps), integrated RSSI, higher input sensitivity (2 mVp−p) | Includes loss-of-signal detection and enhanced diagnostics; suited for adaptive optical receivers | Prefer when system-level monitoring (e.g., LOS flag) and extended low-speed support are required |
Compared with MAX3761ATA+ and SY88303BLKG, the ONET2511PARGT offers uniquely configurable low-frequency response via COC pins and minimal 3 mm × 3 mm footprint-critical for space-constrained optical modules where offset drift compensation and layout efficiency are prioritized over integrated monitoring features.
Availability
ONET2511PARGT is available at Aetrix Electronics and suitable for SONET/SDH OC48 systems, Fibre Channel 2.125-Gbps receivers, and Gigabit Ethernet optical transceivers requiring stable component supply, long-term lifecycle assurance, and consistent electrical performance across temperature.
Supply support for ONET2511PARGT 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.
The ONET2511PARGT belongs to TI's Optical Networking amplifier product line, engineered specifically for high-speed fiber-optic receiver front-ends in telecom and datacom infrastructure where low jitter, wide dynamic range, and power efficiency are critical.
FAQ
What is the operating temperature range for the ONET2511PARGT?
The ONET2511PARGT is characterized for operation from –40°C to +85°C ambient temperature. This industrial-grade range supports deployment in carrier-grade optical line cards, outdoor base station equipment, and enterprise networking hardware where thermal stability is essential. All specified electrical parameters-including gain, jitter, and input sensitivity-are guaranteed across this full range.
Does the ONET2511PARGT support multiple data rates?
Yes, the ONET2511PARGT supports multi-rate operation from 155 Mbps up to 2.5 Gbps. Its architecture maintains consistent 50 dB gain and low deterministic jitter across this range, enabling reuse in OC3/OC12/OC48 SONET systems, 1.0625-Gbps and 2.125-Gbps Fibre Channel, and Gigabit Ethernet without requalification. Performance data in the datasheet confirms 9.3–30 psp−p DJ at 2.5 Gbps and 25–50 psp−p at 155 Mbps.
How is output polarity controlled on the ONET2511PARGT?
Output polarity on the ONET2511PARGT is controlled by the OUTPOL pin (pin 9), a CMOS-level input with internal pull-up. Leaving OUTPOL open or driving it high selects normal polarity (DOUT+ in-phase with DIN+); driving it low inverts the output (DOUT+ 180° out-of-phase). This hardware-selectable feature eliminates need for external XOR gates or layout revisions in multi-channel systems using the ONET2511PARGT.
What external components are required for basic ONET2511PARGT operation?
Only four ac-coupling capacitors (C1–C4) are required for basic ONET2511PARGT operation: two on the differential input (DIN+/DIN−) and two on the differential output (DOUT+/DOUT−). No external termination resistors are needed-the device integrates 50-Ω on-chip termination to VCC (inputs) and VCCO (outputs). An optional 2.2-nF capacitor between COC1 and COC2 may be added to extend low-frequency response to 0.8 kHz.
Can the ONET2511PARGT be used with a single 3.3-V supply?
Yes, the ONET2511PARGT operates from a single 3.3-V ±10% supply applied to both VCC (pins 1, 4) and VCCO (pin 12). The internal bandgap reference and bias generation circuitry derive all required voltages and currents from this rail. Grounding the exposed thermal pad (EP) is mandatory for thermal performance and electrical stability-no separate negative or auxiliary supplies are required.
ONET2511PARGT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Limiting
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 45 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- -
- Current - Supply:
- 22mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 3.6 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-VQFN (3x3)
ONET2511PARGT FAQ
1.How can I place an order for ONET2511PARGT through Aetrix?
Please submit a Request for Quotation (RFQ) for ONET2511PARGT 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 ONET2511PARGT reliable?
The price and inventory of ONET2511PARGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ONET2511PARGT is usually 5 days.
3.What payment methods are accepted for ONET2511PARGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ONET2511PARGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ONET2511PARGT?
ONET2511PARGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ONET2511PARGT 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 ONET2511PARGT?
For technical support, including ONET2511PARGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ONET2511PARGT requirements.
6.How does Aetrix verify that ONET2511PARGT is sourced from the original manufacturer or authorized distributors?
All ONET2511PARGT 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 ONET2511PARGT meets industry standards.
7.What is the process for return or replacement of ONET2511PARGT?
All ONET2511PARGT units undergo pre-shipment inspection (PSI). If there is an issue with ONET2511PARGT, 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 ONET2511PARGT part is unused and in its original packaging.
Return procedure for ONET2511PARGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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