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Analog Devices Inc. AD8015ARZ
- Part No.:
- AD8015ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8015ARZ.pdf
- Description:
- IC TRANSIMPEDANCE 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,640
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Product details
Overview
AD8015ARZ from Analog Devices is a wideband, single-supply transimpedance amplifier optimized for fiber optic receiver circuits, converting photodiode current to differential voltage output with 240 MHz bandwidth, 3.0 pA/√Hz input current noise at 100 MHz, and –36 dBm optical sensitivity at 155.52 Mbps - deployed in SONET/SDH and FDDI receivers.
For engineers reviewing the AD8015ARZ datasheet, AD8015ARZ pinout, AD8015ARZ application, or AD8015ARZ equivalent, this page delivers verified specifications, SO-8 package terminal mapping, real-world noise and bandwidth behavior across temperature, differential output drive capability for ECL/PECL interfaces, and validated alternatives for optical preamplifier design.
Technical Context
The AD8015ARZ employs a bipolar input stage (Q1/Q3) with factory-trimmed 60 Ω resistor (R5) to fix bandwidth at 240 MHz ±20%, using an integrator-based transimpedance architecture that drives a differential gain stage (±3) followed by emitter-follower output buffers. Input bias voltage is fixed at ≈1.8 V below +VS via internal VBYP node.
It supports both photodiode-to-positive-supply and photodiode-to-negative-supply configurations - the latter enabling higher photodiode reverse bias (reducing junction capacitance) while requiring optional R2/C2 decoupling for PSRR improvement. Stray capacitance at IIN is minimized to 0.4 pF (SO-8), with pins 1 and 3 internally unconnected to reduce package parasitics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 240 MHz (3 dB, enables >300 Mbps data rates in SONET OC-3/FDDI) |
| Transresistance | 20 kΩ differential (defines IIN-to-VOUT gain; sets signal amplitude for downstream comparators) |
| Input Current Noise | 3.0 pA/√Hz @ 100 MHz (dominant noise source in high-speed optical receivers; impacts BER floor) |
| Rise/Fall Time | 1.5 ns (10%–90%, supports clean pulse fidelity for NRZ data up to 155 Mbps) |
| Optical Sensitivity | –36 dBm @ 155.52 Mbps (minimum average optical power for <1×10−10 BER in SONET OC-3) |
| Supply Range | +4.5 V to +11 V single supply (supports PECL-compatible +5 V operation and extended headroom) |
| Power Consumption | 25 mA @ +5 V (125 mW typical; enables low-power optical line cards) |
| Operating Temp | –40°C to +85°C (qualified for industrial and telecom infrastructure environments) |
Pinout & Package
AD8015ARZ is housed in an 8-pin SOIC (SO-8) package per JEDEC MS-012, with exposed substrate recommended for attachment to +VS to minimize thermal resistance and improve stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | No Connect (NC) | Internally unconnected; must remain floating to minimize IIN pin capacitance |
| Pin 2 | IIN | Photodiode current input node; ultra-low stray capacitance (0.4 pF) critical for bandwidth/noise performance |
| Pin 3 | No Connect (NC) | Internally unconnected; must remain floating to minimize IIN pin capacitance |
| Pin 4 | VBYP | Internal bias node ≈1.8 V below +VS; requires ≥100 pF bypass capacitor to ground or +VS for noise immunity |
| Pin 5 | –VS | Negative supply rail; accepts ground or –5.2 V for ECL operation; substrate attach point |
| Pin 6 | –OUTPUT | Negative differential output; drives 50 Ω loads directly; common-mode ≈ –1.3 V with +5 V supply |
| Pin 7 | +OUTPUT | Positive differential output; complements Pin 6; enables ECL/PECL-level signaling without external level-shifting |
| Pin 8 | +VS | Positive supply rail; range +4.5 V to +11 V; substrate attach point recommended |
Key Features
| Feature | Design Value |
|---|---|
| Differential transimpedance output | 20 kΩ gain with 1.0 Vp-p swing into high-Z load; eliminates need for external balun or transformer in ECL-coupled systems |
| Low input current noise | 3.0 pA/√Hz @ 100 MHz ensures <1×10−10 BER at –36 dBm in 155 Mbps SONET receivers |
| Wide dynamic range | ±30 µA linear input range and ±350 µA saturation limit support AC-coupled photodiode designs with >2 dB extended overload margin |
| Single-supply flexibility | Operates from +4.5 V to +11 V; compatible with standard +5 V PECL rails and +12 V industrial supplies without level-shifting |
| Thermal-stable bandwidth | 240 MHz nominal bandwidth varies only ±10 MHz from –40°C to +85°C (Figure 8), ensuring consistent timing margins across temperature |
| Photodiode bias configuration support | Validated operation with photodiode referenced to either +VS (higher PSRR) or –VS (lower Cj, higher bandwidth) |
Applications
| SONET OC-3 Receiver | FDDI Optical Link |
|---|---|
Use Scenario: 155.52 Mbps fiber link in telecom central office equipment with APD or PIN photodiode front-end. IC Role / Device Role / Timing Role: Primary transimpedance amplifier converting photodiode current to differential voltage; sets receiver sensitivity and jitter floor. Use Value: –36 dBm sensitivity provides 1 dB margin over SONET OC-3 spec (–35 dBm avg), verified with 223–1 PRN test pattern and BER <1×10−10. |
Use Scenario: Campus backbone network using multimode fiber with 1300 nm laser and 125 Mbps data rate. IC Role / Device Role / Timing Role: Front-end current-to-voltage converter driving AD807 post-amplifier and clock recovery IC. Use Value: 4.4 dB sensitivity margin vs. FDDI spec (–31 dBm avg), enabling robust link budget in noisy EMI environments. |
| AC-Coupled High-Dynamic-Range Receiver | Single-Ended to Differential Conversion |
Use Scenario: Metro access node requiring extended overload tolerance (–4 dBm) while maintaining –35 dBm sensitivity. IC Role / Device Role / Timing Role: Transimpedance amplifier with AC-coupled photodiode input (RAC=7 kΩ, CAC=0.01 µF). Use Value: 2 dB net dynamic range improvement (3 dB overload gain – 1 dB sensitivity loss), validated via pulse response and BER sweep. |
Use Scenario: Legacy single-ended analog sensor interface feeding differential ADC or high-speed comparator. IC Role / Device Role / Timing Role: Precision I-to-V converter with differential output; rejects common-mode noise on long traces. Use Value: 40 dB PSRR (differential) and 37 dB PSRR (single-ended) suppress supply ripple, enabling clean digitization in mixed-signal systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transimpedance amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6629MA/NOPB | 2.1 GHz GBW, 1.1 nV/√Hz voltage noise; no integrated VBYP bias; requires external feedback network | Higher bandwidth but higher input voltage noise; better suited for low-capacitance detectors (<0.2 pF) and >1 Gbps links | Select LMH6629MA/NOPB when detector capacitance is <0.2 pF and system demands >1 GHz small-signal bandwidth. |
| MAX3665ESE+ | 2.5 Gbps data rate support, integrated limiting amplifier; 5.5 mA quiescent current; only available in TSSOP-16 | Integrated limiter simplifies receiver chain but lacks standalone transimpedance flexibility; optimized for GPON/XG-PON | Select MAX3665ESE+ when full receiver functionality (TIA + limiter) in compact footprint is required for 2.5 Gbps PON systems. |
Compared with AD8015ARZ, LMH6629MA/NOPB trades lower current noise for higher voltage noise and external bias complexity, while MAX3665ESE+ integrates post-amplification at the cost of design flexibility and higher minimum detectable power - making AD8015ARZ optimal for discrete, cost-sensitive 155 Mbps SONET/FDDI receivers where noise, power, and layout simplicity are prioritized.
Availability
AD8015ARZ is available at Aetrix Electronics and suitable for fiber optic receiver modules, telecom line cards, and industrial data acquisition systems requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for AD8015ARZ 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, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, communications, and industrial applications.
The AD8015ARZ belongs to Analog Devices' high-speed transimpedance amplifier product line, engineered specifically for cost-effective, silicon-based replacement of GaAs TIAs in SONET, SDH, and FDDI optical receivers operating up to 155 Mbps.
FAQ
What is the maximum photodiode capacitance supported by AD8015ARZ while maintaining 240 MHz bandwidth?
The AD8015ARZ maintains specified bandwidth with ≤0.7 pF total input capacitance (0.4 pF SO-8 package + 0.3 pF typical photodiode). Figure 14 shows differential gain rolls off >3 dB at 1 pF; for full 240 MHz performance, keep total CIN ≤0.7 pF using low-capacitance photodiodes and minimal PCB trace length. AD8015ARZ datasheet specifies 0.4 pF SOIC stray capacitance as baseline.
Can AD8015ARZ operate from a dual supply, and what are the voltage limits?
Yes, AD8015ARZ supports dual-supply operation at ±2.25 V to ±5.5 V per Absolute Maximum Ratings table. However, its internal VBYP node is referenced to +VS, so dual-supply use requires careful grounding strategy - typically –VS = ground and +VS = +5 V, or –VS = –5.2 V and +VS = 0 V (with photodiode referred to –VS). AD8015ARZ is optimized for single +5 V PECL compatibility.
How does the AD8015ARZ achieve –36 dBm sensitivity at 155 Mbps?
AD8015ARZ achieves –36 dBm sensitivity through ultra-low 3.0 pA/√Hz input current noise combined with 20 kΩ differential transresistance and 240 MHz bandwidth, yielding 26.5 nA RMS input-referred noise to 100 MHz. This enables detection of 541 nA peak photocurrent (13× noise) required for BER <1×10−10, translating to –35 dBm average optical power per SONET OC-3 analysis in the AD8015ARZ datasheet.
Is AD8015ARZ pin-compatible with other transimpedance amplifiers like the AD8011 or AD8012?
No, AD8015ARZ is not pin-compatible with AD8011 or AD8012. AD8015ARZ uses an 8-pin SOIC with dedicated VBYP, NC, and differential output pins; AD8011 is a 5-pin SOT-23 single-ended amplifier, and AD8012 is a dual-channel 8-pin SOIC without VBYP or NC pins. Pinout differences prevent drop-in replacement - board redesign is required when substituting AD8015ARZ.
What is the recommended bypass capacitor value for the VBYP pin of AD8015ARZ?
The AD8015ARZ datasheet recommends C1 > 100 pF on the VBYP pin, connected to signal ground or +VS depending on noise environment. For optimum noise immunity with high power supply ripple, connect C1 to +VS. The value should satisfy C1 > 1/(2π × 1000 × fMIN), where fMIN is the lowest useful frequency; 0.01 µF is used in AC-coupled reference designs (Figure 17) to set fc ≈ 2.2 kHz.
AD8015ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Transimpedance
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- -
- Gain Bandwidth Product:
- 240 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- -
- Voltage - Input Offset:
- -
- Current - Supply:
- 25mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 11 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8015ARZ FAQ
1.How can I place an order for AD8015ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8015ARZ 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 AD8015ARZ reliable?
The price and inventory of AD8015ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8015ARZ is usually 5 days.
3.What payment methods are accepted for AD8015ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8015ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8015ARZ?
AD8015ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8015ARZ 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 AD8015ARZ?
For technical support, including AD8015ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8015ARZ requirements.
6.How does Aetrix verify that AD8015ARZ is sourced from the original manufacturer or authorized distributors?
All AD8015ARZ 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 AD8015ARZ meets industry standards.
7.What is the process for return or replacement of AD8015ARZ?
All AD8015ARZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8015ARZ, 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 AD8015ARZ part is unused and in its original packaging.
Return procedure for AD8015ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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