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Analog Devices Inc. ADN2841ACP-48
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- Part No.:
- ADN2841ACP-48
- Manufacturer:
- Analog Devices Inc.
- Category:
- Laser Drivers
- Package:
- 48-WFQFN Exposed Pad, CSP
- Datasheet:
-
ADN2841ACP-48.pdf
- Description:
- IC LSR DRVR 2.7GBPS 5.5V 48LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,330
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Product details
Overview
ADN2841ACP-48 from Analog Devices is a dual-loop laser diode driver IC for high-speed optical transmitters, supporting 50 Mbps to 2.7 Gbps data rates with 80 ps typical rise/fall time, 2–100 mA bias current, and 5–80 mA modulation current. It enables closed-loop control of average optical power and extinction ratio in DWDM and SONET/SDH systems.
For engineers reviewing the ADN2841ACP-48 datasheet, ADN2841ACP-48 pinout, ADN2841ACP-48 application, or ADN2841ACP-48 equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternatives, and supply-ready availability details - all specific to the 48-lead LFCSP variant.
Technical Context
The ADN2841ACP-48 implements two independent closed-loop control paths: one for average optical power (via PSET and PAVCAP) and one for extinction ratio (via ERSET and ERCAP), both using monitor photodiode feedback. Its dual MPD architecture supports wavelength stabilization in DWDM modules by summing IMPD and IMPD2 currents internally while mirroring them separately to IMPDMON and IMPDMON2.
It features programmable alarm thresholds (ASET), selectable loop bandwidth (LBWSET), optional clocked data interface (CLKP/CLKN with CLKSEL), and IDTONE tone modulation for fiber identification. The 48-lead LFCSP package enables full functionality including IDTONE, dual MPD inputs, and CCBIAS - absent in the 32-lead variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 50 Mbps to 2.7 Gbps - supports OC-48/STM-16 and Gigabit Ethernet line rates without retiming. |
| Rise/Fall Time | 80 ps typical - ensures clean optical eye opening at 2.5 Gbps with minimal jitter (20 ps p-p). |
| Bias Current Range | 2 mA to 100 mA - covers threshold and operating range for FP, DFB, and EML lasers. |
| Modulation Current Range | 5 mA to 80 mA - provides sufficient swing for >9.5 dB extinction ratio under closed-loop control. |
| MPD Input Range | 50 µA to 1200 µA - accommodates wide dynamic range of monitor photodiodes across temperature and aging. |
| Supply Voltage | 4.5 V to 5.5 V - single 5 V rail simplifies power delivery; all VCCx pins must be shorted together. |
| Package | 48-lead LFCSP (7 mm × 7 mm, 0.75 mm height) - exposes thermal pad for PCB-level heat dissipation (θJA = 25°C/W). |
Pinout & Package
ADN2841ACP-48 uses a 48-lead Lead Frame Chip Scale Package (LFCSP) with exposed thermal pad requiring connection to VCC or GND plane per JEDEC MO-220-WKKD-4. Pin 1 indicator located at top-left corner; package body dimensions: 7.00 mm × 7.00 mm × 0.75 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1,6,11,15,17,23–25,34,36,37,41,44,45) | Supply ground reference | Multiple dedicated GND pins minimize ground bounce and ensure stable loop operation at 2.7 Gbps. |
| IBIAS (Pins 46,47) | Laser bias current output | Dual-source configuration delivers up to 100 mA total; used with CCBIAS when AC-coupled LD connection. |
| IMODP / IMODN (Pins 42,43,39,40) | Differential modulation current outputs | Drive laser anode/cathode directly; IMODP connects to LD anode, IMODN to 25 Ω termination for 50 Ω system match. |
| IMPD / IMPD2 (Pins 7,10) | Monitor photodiode current inputs | Enable dual-MPD DWDM wavelength locking; IMPD2 is exclusive to 48-lead package. |
| IDTONE (Pin 35) | Fiber identification tone modulation input | Accepts external current sink (50 µA–4 mA); provides 2× gain to IMOD for supervisory channel overlay. |
| LBWSET (Pin 2) | Loop bandwidth selection | Logic high selects slow loop (2.25 sec time constant); logic low enables fast loop (0.22 sec) for 2.7 Gbps operation. |
| ALS (Pin 29) | Automatic laser shutdown control | Active-high input disables IBIAS and IMOD within 10 µs; triggers FAIL alarm and confirms compliance with ITU-T G.958. |
Key Features
| Feature | Design Value |
|---|---|
| Dual closed-loop control | Simultaneous APC and ERC loops eliminate need for external compensation components and reduce R&D cycle time for SONET/SDH compliance. |
| Dual MPD support | Enables wavelength stabilization in DWDM modules via separate IMPD/IMPD2 inputs and mirrored outputs (IMPDMON/IMPDMON2). |
| Programmable alarms | Fail (IBIAS ≥ ASET threshold) and degrade (IBIAS ≥ 90% ASET) alarms meet ITU-T G.958 Section 10.3.1.1.2/1.3 requirements. |
| IDTONE tone modulation | Provides 2%–10% IMOD-level optical tone overlay for fiber identification without external modulator circuitry. |
| Full current monitoring | IBMON, IMMON, IMPDMON, IMPDMON2 provide 100:1 or 1:1 mirrored currents for real-time diagnostics and system health monitoring. |
Applications
| DWDM Dual MPD Wavelength Fixing | SONET OC-48 / SDH STM-16 Transmitter |
|---|---|
Use Scenario: Stabilizing laser wavelength in dense wavelength division multiplexing modules using two monitor photodiodes. IC Role / Device Role / Timing Role: Laser diode driver with dual MPD inputs and internal current summation for closed-loop wavelength control. Use Value: Enables precise λ-locking without external DACs or microcontrollers; IMPD2 input and IMPDMON2 output are exclusive to ADN2841ACP-48. |
Use Scenario: Building compliant OC-48/STM-16 optical transmitters meeting GR-253-CORE jitter and extinction ratio requirements. IC Role / Device Role / Timing Role: High-speed laser driver with 2.7 Gbps capability, 80 ps edge rate, and closed-loop extinction ratio control. Use Value: Meets SONET/SDH standards over temperature and lifetime without manual recalibration; eliminates need for external temperature compensation. |
| Fibre Channel 2 Gbps Link | Gigabit Ethernet SFP Module |
Use Scenario: Implementing 2.125 Gbps Fibre Channel links in storage area networks with automatic laser degradation detection. IC Role / Device Role / Timing Role: Laser driver with fail/degrade alarms and ALS interface for hot-plug safety and link integrity monitoring. Use Value: Provides early warning (DEGRADE) and hard shutdown (FAIL + ALS) before link failure, improving system uptime and diagnostics. |
Use Scenario: Designing cost-sensitive, small-form-factor Gigabit Ethernet SFP modules with integrated power and extinction control. IC Role / Device Role / Timing Role: Single-chip laser driver supporting DC- or AC-coupled data, 5 V supply, and compact 7 mm × 7 mm LFCSP footprint. Use Value: Reduces BOM count and PCB area vs. discrete driver + controller solutions; supports both clocked and unclocked data modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar laser diode driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3736AETE+ | Single-loop APC only; no extinction ratio control; 100 Mbps–2.7 Gbps; 24-pin TQFN. | Lacks dual-loop precision for SONET/SDH-compliant extinction ratio; suitable for simpler FC/GbE links where ERC is not mandated. | Select MAX3736AETE+ when ERC control is unnecessary and board space favors smaller package. |
| LMH6521RTV | Voltage-output driver (not current-output); requires external bias/monitoring circuitry; 2.5 Gbps max; 32-pin WQFN. | No integrated photodiode interface or closed-loop control; demands external ADCs, DACs, and microcontroller for APC/ERC. | Choose LMH6521RTV only if system already includes digital control infrastructure and custom analog front-end design is acceptable. |
Compared with ADN2841ACP-48, MAX3736AETE+ reduces integration but sacrifices SONET/SDH extinction ratio compliance, while LMH6521RTV shifts loop control burden to external components - making ADN2841ACP-48 the only solution offering fully integrated dual-loop, dual-MPD, and IDTONE functionality in a single 48-lead LFCSP.
Availability
ADN2841ACP-48 is available at Aetrix Electronics and suitable for DWDM module manufacturing, SONET/SDH optical line card production, and Fibre Channel transceiver assembly requiring stable component supply across extended temperature ranges (−40°C to +85°C).
Supply support for ADN2841ACP-48 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
Analog Devices is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, communications, and industrial applications.
The ADN2841ACP-48 belongs to Analog Devices' optical communications driver product line, designed specifically for high-reliability, standards-compliant laser control in telecom and datacom transceivers.
FAQ
What is the primary function of the ADN2841ACP-48 in optical transmitter design?
The ADN2841ACP-48 serves as a dual-loop laser diode driver that simultaneously regulates average optical power and extinction ratio using closed-loop feedback from one or two monitor photodiodes. It integrates bias and modulation current drivers, alarm generation, and diagnostic monitoring - enabling SONET/SDH-compliant transmitters without external compensation circuitry. The ADN2841ACP-48 is optimized for DWDM, OC-48, and 2.5 Gbps Fibre Channel applications.
Does the ADN2841ACP-48 support both clocked and unclocked data interfaces?
Yes, the ADN2841ACP-48 supports both configurations. When CLKSEL is tied to VCC, differential clock inputs (CLKP/CLKN) are enabled for clocked data mode; when CLKSEL is grounded, the device operates in unclocked mode using only DATAP/DATAN. This flexibility allows the ADN2841ACP-48 to interface with CDR-less or CDR-integrated systems. The input impedance is 50 Ω, and ac-coupling with 10 nF capacitors is recommended.
How does the dual MPD functionality in the ADN2841ACP-48 differ from the 32-lead variant?
The dual MPD feature - including IMPD2 input, IMPDMON2 output, and internal summation for power control - is exclusive to the 48-lead LFCSP package (ADN2841ACP-48). The 32-lead variant lacks IMPD2, IMPDMON2, IDTONE, and CCBIAS pins entirely. Therefore, only ADN2841ACP-48 supports DWDM wavelength stabilization using two photodiodes, making it the sole choice for dual-MPD applications.
What are the thermal requirements for reliable operation of the ADN2841ACP-48?
The ADN2841ACP-48 has a junction-to-ambient thermal resistance (θJA) of 25°C/W when mounted on a 4-layer PCB with the exposed pad soldered to a solid copper plane. To maintain TJ < 125°C, maximum power dissipation must be calculated using ICC, IBIAS, and IMOD values per the datasheet formula. Adequate decoupling (10 µF bulk + 100 nF local) near each VCC pin and thermal pad connection to VCC or GND are mandatory for stable 2.7 Gbps operation.
Can the ADN2841ACP-48 be used in AC-coupled laser diode configurations?
Yes, the ADN2841ACP-48 supports AC-coupled laser connections via the CCBIAS pin (Pin 48), which acts as a current sink to ground. When the laser is AC-coupled, CCBIAS must be connected to the IBIAS node to provide the required DC bias path. This configuration is documented in Figure 12 of the datasheet and enables flexible PCB layout while maintaining closed-loop control integrity.
ADN2841ACP-48 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad, CSP
- Packaging:
- Bag
- Product Status:
- Obsolete
- Type:
- Laser Diode Driver (Fiber Optic)
- Data Rate:
- 2.7Gbps
- Number of Channels:
- 1
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Supply:
- 50 mA
- Current - Modulation:
- 80mA
- Current - Bias:
- 100 mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-LFCSP (7x7)
- Mounting Type:
- Surface Mount
ADN2841ACP-48 FAQ
1.How can I place an order for ADN2841ACP-48 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADN2841ACP-48 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 ADN2841ACP-48 reliable?
The price and inventory of ADN2841ACP-48 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADN2841ACP-48 is usually 5 days.
3.What payment methods are accepted for ADN2841ACP-48?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADN2841ACP-48 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADN2841ACP-48?
ADN2841ACP-48 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADN2841ACP-48 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 ADN2841ACP-48?
For technical support, including ADN2841ACP-48 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADN2841ACP-48 requirements.
6.How does Aetrix verify that ADN2841ACP-48 is sourced from the original manufacturer or authorized distributors?
All ADN2841ACP-48 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 ADN2841ACP-48 meets industry standards.
7.What is the process for return or replacement of ADN2841ACP-48?
All ADN2841ACP-48 units undergo pre-shipment inspection (PSI). If there is an issue with ADN2841ACP-48, 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 ADN2841ACP-48 part is unused and in its original packaging.
Return procedure for ADN2841ACP-48:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADN2841ACP-48 Tags
-
EPC21701
EPC
-
EPC21601
EPC
-
MAX3799ETJ+T
Analog Devices Inc./Maxim Integrated
-
AD9665ACPZ-REEL7
Analog Devices Inc.
-
MAX3740AETG+T
Analog Devices Inc./Maxim Integrated
-
MAX3795ETG+
Analog Devices Inc./Maxim Integrated
-
EPC21603
EPC
-
ONET8501VRGPT
Texas Instruments
-
MAX3738ETG+T
Analog Devices Inc./Maxim Integrated
-
SY88022ALMG-TR
Microchip Technology
-
ISL78365ARZ-T7A
Renesas
-
EPC21603ENGRT
EPC
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