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Analog Devices Inc. AD8651ARZ-REEL
- Part No.:
- AD8651ARZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8651ARZ-REEL.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,818
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Product details
Overview
AD8651ARZ-REEL from Analog Devices is a precision rail-to-rail input/output CMOS operational amplifier optimized for high-speed, low-noise signal conditioning in single-supply systems. It delivers 50 MHz gain bandwidth, 41 V/μs slew rate, and 4.5 nV/√Hz voltage noise density at 100 kHz, with 100 μV typical offset voltage over full common-mode range - enabling accurate amplification in optical communications transimpedance stages and laser driver feedback loops.
For engineers reviewing the AD8651ARZ-REEL datasheet, AD8651ARZ-REEL pinout, AD8651ARZ-REEL application, or AD8651ARZ-REEL equivalent, key selection criteria include its guaranteed rail-to-rail operation from 2.7 V to 5.5 V, sub-pA input bias current (1 pA typ), –40°C to +125°C extended industrial temperature rating, and DigiTrim®-enabled offset stability across common-mode voltage transitions.
Technical Context
The AD8651ARZ-REEL implements a dual-input-stage architecture: parallel NMOS and PMOS differential pairs enable true rail-to-rail input common-mode range (–0.1 V to +5.1 V at 5 V supply), with DigiTrim® post-package trimming applied independently to both stages to minimize offset variation across the 500 mV transition region. This architecture achieves 95 dB CMRR over full common-mode range and eliminates phase reversal within supply rails.
Its rail-to-rail output stage uses complementary NMOS/PMOS common-source drivers, delivering 40 mA output current while maintaining 30 mV VOL and 4.97 V VOH at 250 µA load over –40°C to +125°C. The 50 MHz GBP and 0.2 µs 0.01% settling time support closed-loop configurations in high-resolution ADC/DAC interfaces and broadband video line driving.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 50 MHz - supports stable unity-gain buffers and G = 10 configurations up to 5 MHz without peaking. |
| Slew Rate | 41 V/μs - enables clean 2 V step response in ≤0.2 μs with 0.01% settling, critical for fast DAC output buffering. |
| Voltage Noise Density | 4.5 nV/√Hz at 100 kHz - ensures <0.0006% THD+N in 1 kHz audio and laser PA control loops. |
| Input Bias Current | 1 pA typical - preserves signal integrity in high-impedance photodiode preamp and sensor front-end designs. |
| Offset Voltage | 100 μV typical, 1.7 mV max over –40°C to +125°C - guarantees DC accuracy in closed-loop power control circuits. |
| Supply Range | 2.7 V to 5.5 V - allows direct interfacing with 3.3 V and 5 V logic domains without level-shifting. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial motor control, and base station RF modules. |
Pinout & Package
AD8651ARZ-REEL is housed in an 8-lead SOIC_N (R-8) package per JEDEC MS-012AA, with 1.27 mm pitch and 5.0 mm × 6.2 mm footprint. Pin 1 is marked by a beveled corner or dot; pins 1, 5, and 8 are no-connect (NC) terminals internally isolated from circuitry.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect | Internally unconnected; must remain floating - no routing or grounding permitted. |
| 2 | Inverting Input (–IN) | Differential input node; requires symmetric layout and guard ring for leakage-sensitive applications. |
| 3 | Non-Inverting Input (+IN) | Differential input node; matched trace length and impedance to Pin 2 minimizes CM-to-DM conversion. |
| 4 | Negative Supply (V–) | Ground reference for single-supply operation; connects directly to PCB ground plane with low-inductance path. |
| 5 | No Connect | Internally unconnected; must remain floating - no routing or grounding permitted. |
| 6 | Output (OUT) | Class-AB rail-to-rail output capable of sourcing/sinking 40 mA; decoupling capacitor required within 2 mm. |
| 7 | Positive Supply (V+) | Power input for 2.7–5.5 V operation; bypassed with 0.1 µF ceramic + 4.7 µF tantalum per layout guidelines. |
| 8 | No Connect | Internally unconnected; must remain floating - no routing or grounding permitted. |
Key Features
| Feature | Design Value |
|---|---|
| DigiTrim® In-Package Trimming | Corrects offset voltage across full input common-mode range (–0.1 V to +5.1 V), reducing distortion in rail-to-rail input transitions. |
| Rail-to-Rail Input/Output | Enables full dynamic range utilization in 3.3 V systems: inputs accept signals from GND to V+, outputs swing to within 30 mV of rails. |
| Low Input Bias Current | 1 pA typical ensures <1 mV error in 1 GΩ photodiode TIA configurations, preserving SNR in optical receivers. |
| High CMRR Over Temp | 70 dB min from –40°C to +125°C ensures stable closed-loop gain in temperature-varying industrial sensor interfaces. |
| No Phase Reversal | Guaranteed operation without output polarity inversion when inputs exceed supply rails - simplifies protection design. |
Applications
| Optical Transimpedance Amplifier | Laser Diode Current Controller |
|---|---|
|
Use Scenario: Amplifying low-level photocurrent from PIN photodiodes in fiber-optic SFP+ modules operating at 10 Gbps. IC Role / Device Role / Timing Role: Primary transimpedance amplifier with 50 MHz bandwidth and 4.5 nV/√Hz noise floor to maximize receiver sensitivity. Use Value: Sub-pA input bias current prevents DC error accumulation in high-gain (>10 kΩ) feedback networks, maintaining BER <1e−12. |
Use Scenario: Closed-loop current regulation for 1550 nm DFB lasers in CATV optical nodes requiring ±0.1% stability. IC Role / Device Role / Timing Role: Precision error amplifier comparing monitor photodiode output against reference voltage in analog feedback loop. Use Value: 100 μV offset and 4 μV/°C drift ensure <±50 μA current error over –40°C to +85°C ambient, meeting ITU-T G.984 spec. |
| High-Speed DAC Output Buffer | Video Line Driver |
|
Use Scenario: Buffering 16-bit, 100 MSPS DAC outputs in medical ultrasound beamforming systems. IC Role / Device Role / Timing Role: Unity-gain stable buffer isolating DAC from cable capacitance while preserving 0.01% settling fidelity. Use Value: 0.2 μs 0.01% settling time and 50 MHz bandwidth prevent image ghosting and maintain >92 dB SFDR. |
Use Scenario: Driving 75 Ω coaxial cables in HD-SDI broadcast equipment with SMPTE 292M compliance. IC Role / Device Role / Timing Role: Single-ended video driver delivering 1 Vpp into 75 Ω with minimal group delay variation. Use Value: 41 V/μs slew rate and 0.0006% THD+N at 1 kHz ensure <0.1% differential gain/phase error across 0–1.485 GHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA350UA | Lower GBP (38 MHz), higher noise (7 nV/√Hz), no DigiTrim - 1.2 mV max offset over temp. | Not rated for +125°C operation; limited to +85°C industrial grade. | Choose OPA350UA only for cost-sensitive 3.3 V systems where 50 MHz bandwidth and extended temp are not required. |
| ADA4898-1ARZ | Higher supply current (18 mA vs. 14 mA), lower noise (1.1 nV/√Hz), but 2.8 V min supply - no rail-to-rail input. | Requires dual ±2.5 V supplies; unsuitable for single-supply 2.7 V systems. | Choose ADA4898-1ARZ only when ultra-low noise dominates over supply flexibility and temperature range. |
Compared with OPA350UA and ADA4898-1ARZ, AD8651ARZ-REEL uniquely combines 50 MHz bandwidth, rail-to-rail I/O, 1 pA bias current, and –40°C to +125°C qualification in a single SOIC package - making it the only option for space-constrained, wide-temp, single-supply precision analog front-ends.
Availability
AD8651ARZ-REEL is available at Aetrix Electronics and suitable for optical transceiver modules, laser diode controllers, high-speed data acquisition systems, and broadcast video infrastructure requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8651ARZ-REEL 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The AD865x product line was engineered specifically for precision, high-speed signal conditioning in single-supply optical, communications, and instrumentation systems - emphasizing rail-to-rail operation, ultra-low noise, and temperature-stable offset performance.
FAQ
What is the maximum operating supply voltage for AD8651ARZ-REEL?
The absolute maximum supply voltage for AD8651ARZ-REEL is 6.0 V, but the recommended operating range is 2.7 V to 5.5 V. Operation above 5.5 V risks permanent damage per the Absolute Maximum Ratings table. At 5.5 V, the device maintains full rail-to-rail output swing and 41 V/μs slew rate, verified across –40°C to +125°C.
Does AD8651ARZ-REEL support true rail-to-rail input at 2.7 V supply?
Yes, AD8651ARZ-REEL supports rail-to-rail input with common-mode voltage range from –0.1 V to +2.8 V at 2.7 V supply, as specified in Table 1. Its dual NMOS/PMOS input stage remains fully functional across this range, and DigiTrim® ensures offset stability even during the 500 mV transition region near V+/2.
Can AD8651ARZ-REEL drive a 600 Ω load at 1 kHz with low distortion?
Yes, AD8651ARZ-REEL achieves 0.0006% THD+N driving a 600 Ω load at 1 kHz with 2 V p-p output, as measured in the Electrical Characteristics tables. This performance holds across –40°C to +125°C and is enabled by its 4.5 nV/√Hz noise floor and high open-loop gain (115 dB typ).
Is AD8651ARZ-REEL pin-compatible with other op amps in SOIC-8 packages?
No - AD8651ARZ-REEL has a nonstandard SOIC-8 pinout with NC on Pins 1, 5, and 8. It is not pin-compatible with generic SOIC-8 op amps like LM358 or TL072. Layout must follow the exact pin configuration shown in Figure 3 of the AD8651/AD8652 Rev. D datasheet.
What thermal resistance does AD8651ARZ-REEL exhibit in SOIC_N packaging?
AD8651ARZ-REEL in the 8-lead SOIC_N (R-8) package has a junction-to-ambient thermal resistance (θJA) of 158°C/W and junction-to-case (θJC) of 43°C/W, per Table 4. These values assume standard JEDEC 2S2P board conditions and require proper copper pour and via stitching to achieve rated performance at 14 mA supply current.
AD8651ARZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- DigiTrim®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 41V/µs
- Gain Bandwidth Product:
- 50 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 9.5mA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8651ARZ-REEL FAQ
1.How can I place an order for AD8651ARZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8651ARZ-REEL 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 AD8651ARZ-REEL reliable?
The price and inventory of AD8651ARZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8651ARZ-REEL is usually 5 days.
3.What payment methods are accepted for AD8651ARZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8651ARZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8651ARZ-REEL?
AD8651ARZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8651ARZ-REEL 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 AD8651ARZ-REEL?
For technical support, including AD8651ARZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8651ARZ-REEL requirements.
6.How does Aetrix verify that AD8651ARZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD8651ARZ-REEL 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 AD8651ARZ-REEL meets industry standards.
7.What is the process for return or replacement of AD8651ARZ-REEL?
All AD8651ARZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8651ARZ-REEL, 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 AD8651ARZ-REEL part is unused and in its original packaging.
Return procedure for AD8651ARZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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