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Analog Devices Inc. AD8651ARZ-REEL7
- Part No.:
- AD8651ARZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8651ARZ-REEL7.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:694
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Product details
Overview
AD8651ARZ-REEL7 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 use in laser driver feedback loops, high-resolution ADC/DAC buffers, and video line driving circuits.
For engineers reviewing the AD8651ARZ-REEL7 datasheet, AD8651ARZ-REEL7 pinout, AD8651ARZ-REEL7 application, or AD8651ARZ-REEL7 equivalent, key selection criteria include 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 input common-mode voltage.
Technical Context
The AD8651ARZ-REEL7 implements a dual-differential-input-stage architecture (NMOS + PMOS pairs) to achieve 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 eliminates the typical VOS step seen in competing amplifiers during common-mode crossover.
Its voltage-feedback topology supports stable unity-gain operation with 50 MHz GBP and 0.2 µs settling time to 0.01% for 2 V steps. Output stage uses complementary NMOS/PMOS common-source configuration, delivering 40 mA drive capability while maintaining rail-to-rail swing - VOH = 4.97 V and VOL = 30 mV at 250 µA load over –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 50 MHz - enables stable closed-loop operation up to ~40 MHz with moderate gain, suitable for broadband communication channel buffering. |
| Slew Rate | 41 V/µs - supports clean reproduction of fast 2 V step signals with ≤0.2 µs 0.01% settling, critical for video and high-speed data acquisition. |
| Voltage Noise Density | 4.5 nV/√Hz at 100 kHz - ensures minimal contribution to system SNR in precision sensor front-ends and photodiode preamps. |
| Input Bias Current | 1 pA typical - preserves signal integrity in high-impedance source applications (e.g., piezoelectric sensors, pH electrodes) without loading error. |
| Offset Voltage | 100 µV typical, 1.7 mV max over –40°C to +125°C - provides DC accuracy in closed-loop transimpedance and precision gain stages without external trimming. |
| Supply Range | 2.7 V to 5.5 V - allows direct interfacing with 3.3 V and 5 V logic domains and battery-powered instrumentation without level-shifting. |
| Common-Mode Rejection | 70–95 dB over full temperature and common-mode range - maintains gain accuracy when input signals approach supply rails in single-supply configurations. |
Pinout & Package
AD8651ARZ-REEL7 is housed in an 8-lead SOIC_N (R-8) package with standard op amp pinout and two no-connect (NC) pins. The package meets JEDEC MS-012AC standards and supports reflow soldering per IPC/JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect (NC) | Internally unconnected; must remain floating - no routing or grounding required. |
| 2 | Inverting Input (–IN) | Differential input node; accepts signals within –0.1 V to +5.1 V at 5 V supply - supports rail-to-rail common-mode operation. |
| 3 | Non-Inverting Input (+IN) | Differential input node; identical common-mode range as –IN; used for unity-gain buffer or non-inverting amplifier configurations. |
| 4 | Negative Supply (V–) | Ground reference terminal for single-supply operation; tied to 0 V in 2.7–5.5 V systems. |
| 5 | No Connect (NC) | Internally unconnected; must remain floating - no routing or grounding required. |
| 6 | Output (OUT) | Amplified output capable of sourcing/sinking 40 mA; swings within 30 mV of V– and 30 mV of V+ under 250 µA load. |
| 7 | Positive Supply (V+) | Power input for 2.7–5.5 V operation; requires local 0.1 µF ceramic bypass capacitor placed adjacent to pin. |
| 8 | No Connect (NC) | Internally unconnected; must remain floating - no routing or grounding required. |
Key Features
| Feature | Design Value |
|---|---|
| DigiTrim® In-Package Trimming | Corrects input offset voltage across entire common-mode range (–0.1 V to +5.1 V), reducing distortion from VOS variation by >5× vs. untrimmed rail-to-rail amplifiers. |
| Rail-to-Rail Input Stage | True CMOS differential pair architecture with NMOS/PMOS parallel inputs extends usable input range to both supply rails - essential for single-supply sensor interfaces. |
| Rail-to-Rail Output Stage | Complementary NMOS/PMOS common-source output delivers 40 mA drive while maintaining <30 mV headroom to rails at light loads - enables direct driving of 600 Ω video lines. |
| Low Input Bias Current | 1 pA typical (≤600 pA over –40°C to +125°C) - minimizes voltage error in high-Z feedback networks and photodiode transimpedance applications. |
| Extended Temperature Range | Specified from –40°C to +125°C - supports deployment in automotive engine control modules, industrial motor drives, and outdoor telecom equipment. |
Applications
| Laser Source Control | High-Speed Data Acquisition |
|---|---|
Use Scenario: Closed-loop current regulation for fiber-optic transmitter lasers operating at 2.5 Gbps. IC Role / Device Role / Timing Role: Precision transimpedance amplifier and feedback comparator in analog PA control loop. Use Value: 4.5 nV/√Hz noise and 100 µV offset ensure <±0.5% current accuracy over temperature, directly improving optical power stability. |
Use Scenario: Driver/buffer for 16-bit SAR ADC sampling at 1 MSPS in medical imaging front-end. IC Role / Device Role / Timing Role: Unity-gain follower with 0.2 µs 0.01% settling to preserve signal fidelity before digitization. Use Value: 50 MHz GBW and 41 V/µs slew rate prevent settling-induced harmonic distortion in wideband analog input paths. |
| Video Line Driving | Cell Phone Power Amplifier Control |
Use Scenario: RGB signal distribution to 75 Ω coaxial video lines in portable display subsystems. IC Role / Device Role / Timing Role: Low-distortion, rail-to-rail output buffer with 600 Ω drive capability. Use Value: THD+N = 0.0006% at 1 kHz and 2 Vp-p ensures broadcast-grade color fidelity without post-processing correction. |
Use Scenario: Transmit power monitoring and feedback in LTE/5G handset RF front-end modules. IC Role / Device Role / Timing Role: High-speed comparator and integrator in closed-loop PA bias control loop. Use Value: Sub-pA input bias prevents drift in precision current-sense resistor networks, maintaining ±0.3 dB transmit power accuracy. |
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/2K5 | Lower GBP (38 MHz), higher VOS drift (10 µV/°C vs. 4 µV/°C), no DigiTrim® - exhibits measurable VOS step in common-mode transition region. | Less suited for precision DC-coupled laser bias control where common-mode voltage varies across full rail range. | Choose OPA350UA/2K5 only if cost sensitivity outweighs need for guaranteed rail-to-rail VOS stability. |
| ADA4898-1ARZ | Higher noise (1.1 nV/√Hz), higher supply current (18 mA vs. 14 mA), wider bandwidth (190 MHz) - optimized for ultra-low-noise, not ultra-low-offset. | Better for low-noise preamp stages; less optimal for DC-accurate feedback loops requiring <100 µV offset over temperature. | Select ADA4898-1ARZ when voltage noise dominates system error budget; retain AD8651ARZ-REEL7 for mixed-signal precision timing and DC accuracy. |
Compared with OPA350UA/2K5 and ADA4898-1ARZ, AD8651ARZ-REEL7 uniquely balances 50 MHz bandwidth, 4.5 nV/√Hz noise, and 100 µV offset with DigiTrim®-guaranteed stability - making it the preferred choice for applications demanding simultaneous speed, precision, and rail-to-rail operation in single-supply environments.
Availability
AD8651ARZ-REEL7 is available at Aetrix Electronics and suitable for laser driver feedback, high-speed data acquisition, and video line driving applications requiring stable component supply across automotive, industrial, and communications end markets.
Supply support for AD8651ARZ-REEL7 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.
The AD865x family was designed specifically for precision, high-speed signal conditioning in space-constrained, single-supply systems - targeting optical communications, test equipment, and portable instrumentation where rail-to-rail operation and low distortion are mandatory.
FAQ
What is the maximum operating temperature range for AD8651ARZ-REEL7?
The AD8651ARZ-REEL7 is fully specified from –40°C to +125°C, meeting extended industrial temperature requirements. Electrical characteristics including offset voltage (1.7 mV max), CMRR (70 dB min), and supply current (15 mA max) are guaranteed across this full range - enabling use in under-hood automotive modules and industrial motor control enclosures.
Does AD8651ARZ-REEL7 support true rail-to-rail input operation?
Yes, AD8651ARZ-REEL7 features a dual-input-stage architecture (NMOS + PMOS differential pairs) that extends the input common-mode voltage range to –0.1 V and +5.1 V at 5 V supply - covering both supply rails. This is verified in Figure 8 and Figure 36 of the datasheet, with DigiTrim® ensuring <100 µV offset variation across the full range.
What is the recommended power supply bypassing for AD8651ARZ-REEL7?
Analog Devices specifies a parallel 0.1 µF ceramic (X7R/NPO) capacitor placed immediately adjacent to the V+ pin, plus a 4.7 µF tantalum capacitor at the board-level supply entry. The 0.1 µF cap must have short, low-inductance traces to ground - critical for suppressing high-frequency noise coupling into the 50 MHz amplifier core.
Can AD8651ARZ-REEL7 drive a 600 Ω video load?
Yes, AD8651ARZ-REEL7 delivers 40 mA output current and achieves rail-to-rail swing with <30 mV headroom at 250 µA load. At 600 Ω, it sustains 2 Vp-p output with 0.0006% THD+N at 1 kHz (Table 1), confirming suitability for broadcast-quality SD/HD video line driving without external gain stages.
Is AD8651ARZ-REEL7 pin-compatible with other op amps in the AD865x family?
AD8651ARZ-REEL7 shares identical 8-lead SOIC_N pinout with AD8652ARZ but is a single-channel device; AD8652 is dual-channel with different pin mapping (OUT A/OUT B). It is not pin-compatible with AD8651ARMZ (MSOP-8) due to differing package dimensions and thermal pad configuration - PCB layout must match the R-8 footprint.
AD8651ARZ-REEL7 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-REEL7 FAQ
1.How can I place an order for AD8651ARZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8651ARZ-REEL7 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-REEL7 reliable?
The price and inventory of AD8651ARZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8651ARZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8651ARZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8651ARZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8651ARZ-REEL7?
AD8651ARZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8651ARZ-REEL7 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-REEL7?
For technical support, including AD8651ARZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8651ARZ-REEL7 requirements.
6.How does Aetrix verify that AD8651ARZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8651ARZ-REEL7 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-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8651ARZ-REEL7?
All AD8651ARZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8651ARZ-REEL7, 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-REEL7 part is unused and in its original packaging.
Return procedure for AD8651ARZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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