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Analog Devices Inc. AD8651ARMZ-REEL
- Part No.:
- AD8651ARMZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8651ARMZ-REEL.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:12,132
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Product details
Overview
AD8651ARMZ-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 laser driver feedback loops and high-resolution ADC front-ends.
For engineers reviewing the AD8651ARMZ-REEL datasheet, AD8651ARMZ-REEL pinout, AD8651ARMZ-REEL application, or AD8651ARMZ-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 temperature rating, and MSOP-8 packaging suitable for space-constrained optical and communications modules.
Technical Context
The AD8651ARMZ-REEL implements a dual-input-stage architecture - parallel NMOS and PMOS differential pairs - enabling true rail-to-rail input common-mode range (−0.1 V to +5.1 V at 5 V supply) without phase reversal. Its DigiTrim® in-package trimming corrects offset voltage across the entire input common-mode range, ensuring stable CMRR (min 70 dB at 125°C) and low distortion (0.0006% THD+N).
This amplifier operates as a voltage-feedback op amp with 115 dB typical open-loop gain (RL = 1 kΩ), 0.2 μs 0.01% settling time for 2 V step, and overload recovery under 100 ns from negative rail. Its output stage uses complementary NMOS/PMOS common-source transistors, delivering 40 mA drive capability while maintaining 30 mV VOL and 2.67 V VOH at 250 μA load over −40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 50 MHz - supports stable closed-loop operation up to ~40 MHz with G ≥ 2, suitable for video line drivers and DAC reconstruction filters. |
| Slew Rate | 41 V/μs - enables faithful reproduction of fast 2 V step signals within 0.2 μs (0.01%), critical for broadband communication interfaces. |
| Voltage Noise Density | 4.5 nV/√Hz at 100 kHz - minimizes added noise in photodiode preamp and high-speed data acquisition front-ends. |
| Input Bias Current | 1 pA typical - preserves signal integrity in high-impedance sensor interfaces (e.g., piezoelectric, pH electrodes) without significant DC error. |
| Offset Voltage | 100 μV typical (0–5 V VCM), 1.7 mV max at +125°C - ensures <0.5 LSB error in 16-bit ADC buffer applications at 5 V full-scale. |
| Supply Range | 2.7 V to 5.5 V - enables direct interfacing with Li-ion battery rails, 3.3 V logic, and industrial 5 V systems without level-shifting. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, base station RF modules, and industrial motor control feedback paths. |
Pinout & Package
AD8651ARMZ-REEL is housed in an 8-lead MSOP (RM-8) package, 3.0 mm × 3.0 mm × 1.1 mm, with exposed pad for thermal enhancement (θJA = 210°C/W). Pin 1 is marked by a dot; pins 1, 5, and 8 are no-connect (NC) terminals per datasheet Figure 1 and Figure 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect | Internally unconnected; must remain floating - not usable for grounding or bypassing. |
| 2 | Inverting Input (−IN) | Differential input node; high-impedance (1 pA IB), rail-to-rail common-mode range supports single-supply sensor interfacing. |
| 3 | Non-Inverting Input (+IN) | Differential input node; matched to −IN for optimal CMRR; guard ring routing recommended to suppress leakage. |
| 4 | Negative Supply (V−) | Ground reference for single-supply operation (0 V); connects to PCB ground plane with low-inductance path. |
| 5 | No Connect | Internally unconnected; must remain floating - no external connection permitted. |
| 6 | Output (OUT) | Class-AB rail-to-rail output capable of sourcing/sinking 40 mA; settles to 0.01% in 0.2 μs with 2 V step. |
| 7 | Positive Supply (V+) | Power input (2.7–5.5 V); requires local 0.1 μF ceramic bypass capacitor placed ≤2 mm from pin. |
| 8 | No Connect | Internally unconnected; must remain floating - ties to die substrate are absent; no thermal or electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| DigiTrim® In-Package Trimming | Corrects input offset voltage across full common-mode range (−0.1 V to +5.1 V), eliminating VOS-induced distortion in rail-to-rail applications. |
| Rail-to-Rail Input & Output | Supports full dynamic range utilization in 3.3 V and 5 V systems - input accepts signals from V− to V+, output swings within 30 mV of rails at 250 μA load. |
| Low Input Bias Current | 1 pA typical (−40°C to +125°C) enables use with >1 GΩ source impedances without measurable DC error or drift. |
| High-Speed Precision | 50 MHz GBW + 41 V/μs SR + 0.0006% THD+N enables clean amplification of multi-MHz signals in optical transceiver TIAs and DAC buffers. |
| Extended Temperature Range | Specified from −40°C to +125°C with guaranteed parameters - eliminates derating concerns in automotive engine control and industrial PLC analog I/O. |
Applications
| Laser Source Controller | High-Speed ADC Driver |
|---|---|
Use Scenario: Closed-loop current control of fiber-optic laser diodes in 10G/25G transceivers, where feedback accuracy directly impacts optical power stability and eye diagram quality. IC Role / Device Role / Timing Role: Precision transimpedance amplifier and error amplifier in analog feedback loop, converting photodiode current to voltage and comparing against reference. Use Value: 100 μV offset and 4.5 nV/√Hz noise ensure <±0.5% optical power regulation error over temperature; rail-to-rail swing accommodates full 0–3.3 V DAC reference range. |
Use Scenario: Driving the input of 16-bit SAR ADCs (e.g., AD7960) in automated test equipment, where amplifier settling and noise directly limit effective resolution. IC Role / Device Role / Timing Role: Buffered gain stage and anti-aliasing filter driver, providing low-impedance, low-noise source to ADC sample capacitor. Use Value: 0.2 μs 0.01% settling guarantees full-scale step acquisition within one ADC conversion cycle at 5 MSPS; 115 dB AVO maintains linearity across 0–5 V input span. |
| Video Line Driver | Cell Phone PA Control |
Use Scenario: RGB/YUV video signal buffering in portable displays and HDMI source devices, requiring wide bandwidth, low crosstalk, and DC-coupled output swing. IC Role / Device Role / Timing Role: Unity-gain voltage follower driving 75 Ω coaxial cable loads, preserving rise/fall times and minimizing group delay variation. Use Value: 50 MHz bandwidth and 41 V/μs slew rate support 1080p60 video (165 MHz pixel clock harmonics); rail-to-rail output delivers full 0–3.3 V swing into 75 Ω without clipping. |
Use Scenario: Transmit power monitoring and control loop in LTE/5G handset power amplifiers, where precise detection of PA output envelope determines gain adjustment. IC Role / Device Role / Timing Role: High-linearity envelope detector amplifier and comparator reference buffer in RF power control ICs (e.g., ADL5501 interface). Use Value: Sub-pA input bias prevents loading of high-Z RF detector outputs; 0.0006% THD+N avoids intermodulation distortion in adjacent LTE bands during power ramp-up. |
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 |
|---|---|---|---|
| AD8652ARMZ-REEL | Dual-channel version in same MSOP-8 package; 17.5 mA supply current vs. 9.5 mA for AD8651ARMZ-REEL; identical AC specs (50 MHz, 41 V/μs, 4.5 nV/√Hz). | Used where board space permits dual amplifiers (e.g., differential receiver, composite video filter), not single-ended signal paths. | Select AD8652ARMZ-REEL only when two matched amplifiers are required - avoid for single-channel designs due to unnecessary power and cost penalty. |
| OPA350EA/250 | Single 5.5 V CMOS op amp; 38 MHz GBW, 22 V/μs SR, 7 nV/√Hz noise; no DigiTrim - VOS shifts >200 μV across common-mode range. | Acceptable for lower-bandwidth (<20 MHz), lower-precision applications where VOS drift and noise are less critical. | Choose OPA350EA/250 only if budget constraints outweigh need for guaranteed rail-to-rail precision; AD8651ARMZ-REEL provides superior VOS stability and noise performance. |
Compared with AD8652ARMZ-REEL, AD8651ARMZ-REEL reduces quiescent current by 46% and saves board area in single-amplifier layouts; versus OPA350EA/250, it delivers 32% higher bandwidth, 86% lower noise, and DigiTrim-enabled VOS flatness essential for precision closed-loop control.
Availability
AD8651ARMZ-REEL is available at Aetrix Electronics and suitable for optical transceiver design, high-speed data acquisition, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8651ARMZ-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 R&D and manufacturing facilities worldwide.
The AD865x family was engineered for precision, high-speed signal conditioning in single-supply systems - targeting optical networking, wireless infrastructure, and high-fidelity data conversion where low noise, rail-to-rail operation, and temperature-stable offset are non-negotiable.
FAQ
What is the maximum operating supply voltage for AD8651ARMZ-REEL?
The absolute maximum supply voltage for AD8651ARMZ-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 Absolute Maximum Ratings (Table 3, Rev. D datasheet). At 5.5 V, VOH remains ≥4.95 V and VOL ≤35 mV under 250 μA load across −40°C to +125°C.
Does AD8651ARMZ-REEL support rail-to-rail input with a 3.3 V supply?
Yes - AD8651ARMZ-REEL supports rail-to-rail input common-mode range from −0.1 V to +3.4 V when V+ = 3.3 V and V− = 0 V. This is confirmed in Table 1 (VCM = −0.1 V to +V+ + 0.1 V) and General Description (p.1), enabling direct interfacing with 3.3 V sensors and DACs without level-shifting.
What is the thermal resistance (θJA) of the AD8651ARMZ-REEL MSOP-8 package?
The junction-to-ambient thermal resistance (θJA) for AD8651ARMZ-REEL in the 8-lead MSOP (RM-8) package is 210°C/W, as specified in Table 4 (Rev. D datasheet). This value assumes worst-case PCB mounting - actual θJA improves significantly with copper pour under the exposed pad and multiple thermal vias.
Can AD8651ARMZ-REEL drive a 600 Ω load at 1 kHz with low distortion?
Yes - AD8651ARMZ-REEL achieves 0.0006% THD+N driving a 600 Ω load at 1 kHz with 2 V p-p input (Table 1, Rev. D), meeting broadcast video and professional audio requirements. Its 41 V/μs slew rate prevents slewing-induced distortion even at higher frequencies into this load.
Is the exposed pad on the AD8651ARMZ-REEL MSOP-8 package electrically connected?
No - the exposed pad on AD8651ARMZ-REEL is thermally conductive but electrically isolated (not connected to any internal node). Per Analog Devices' MSOP packaging standard and AN-827 application note, it must be soldered to a PCB thermal pad for heat dissipation but left floating or tied to V− only if required by system grounding scheme.
AD8651ARMZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- DigiTrim®
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-MSOP
AD8651ARMZ-REEL FAQ
1.How can I place an order for AD8651ARMZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8651ARMZ-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 AD8651ARMZ-REEL reliable?
The price and inventory of AD8651ARMZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8651ARMZ-REEL is usually 5 days.
3.What payment methods are accepted for AD8651ARMZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8651ARMZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8651ARMZ-REEL?
AD8651ARMZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8651ARMZ-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 AD8651ARMZ-REEL?
For technical support, including AD8651ARMZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8651ARMZ-REEL requirements.
6.How does Aetrix verify that AD8651ARMZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD8651ARMZ-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 AD8651ARMZ-REEL meets industry standards.
7.What is the process for return or replacement of AD8651ARMZ-REEL?
All AD8651ARMZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8651ARMZ-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 AD8651ARMZ-REEL part is unused and in its original packaging.
Return procedure for AD8651ARMZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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