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Analog Devices Inc. AD8646WARZ-R7
- Part No.:
- AD8646WARZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8646WARZ-R7.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
AD8646WARZ-R7 from Analog Devices is a dual, rail-to-rail input/output precision operational amplifier optimized for automotive-grade operation (−40°C to +125°C), featuring 24 MHz gain bandwidth, 11 V/μs slew rate, 2.5 mV max offset voltage, and 2 mA max supply current per amplifier across 2.7 V to 5.5 V single-supply operation. It enables high-fidelity signal conditioning in battery-powered sensor front ends and ADC drivers.
For engineers reviewing the AD8646WARZ-R7 datasheet, AD8646WARZ-R7 pinout, AD8646WARZ-R7 application, or AD8646WARZ-R7 equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options - all grounded in the Rev. F datasheet and official ordering guide.
Technical Context
The AD8646WARZ-R7 implements a CMOS input stage delivering 1 pA typical input bias current and 8 nV/√Hz voltage noise density at 1 kHz, supporting high-impedance photodiode and ASIC interface applications. Its unity-gain stable architecture achieves 74° phase margin at 5 V supply with 2 kΩ load.
It operates across full automotive temperature range without phase reversal and maintains rail-to-rail output swing (e.g., 4.98 V high / 20 mV low at 1 mA, 5 V supply), enabling direct interfacing with CMOS ADCs and DACs in single-supply systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 24 MHz - supports stable closed-loop operation up to ~2.4 MHz at AV = 10 without compensation. |
| Slew Rate | 11 V/μs - enables accurate reproduction of fast 10–20 V step signals within sub-microsecond settling. |
| Input Offset Voltage | 2.5 mV max - ensures ≤0.5% error in 500 mV full-scale sensor outputs without trimming. |
| Supply Current per Amplifier | 2.0 mA max at 25°C - allows dual-channel operation under 4.5 mW at 5 V, suitable for power-constrained modules. |
| Input Bias Current | 1 pA typical - preserves signal integrity in >1 GΩ source impedance circuits like piezoelectric sensors. |
| Common-Mode Rejection Ratio | 84 dB min - rejects >12× common-mode interference in noisy automotive harness environments. |
| Output Short-Circuit Current | ±120 mA - drives 50 Ω lines or parallel 10-bit DAC loads without external buffers. |
Pinout & Package
AD8646WARZ-R7 is packaged in an 8-lead SOIC_N (R-8) with 1.27 mm pitch, JEDEC MS-012-AA compliant, thermal resistance θJA = 125°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUTA | Amplifier A output | Delivers rail-to-rail buffered signal; capable of sourcing/sinking ±120 mA into short-circuit. |
| 2: –INA | Inverting input of Amp A | High-impedance node (1 pA bias); accepts differential or single-ended feedback configurations. |
| 3: +INA | Non-inverting input of Amp A | CMOS input with 0–5 V common-mode range on 5 V supply; supports direct connection to CMOS logic outputs. |
| 4: V– | Negative supply rail | Ground reference for single-supply operation; must be tied to system ground with low-impedance path. |
| 5: V+ | Positive supply rail | Accepts 2.7–5.5 V; PSRR of 80 dB minimizes supply ripple coupling into output. |
| 6: +INB | Non-inverting input of Amp B | Independent channel input; identical specs to +INA - enables matched dual-path signal chains. |
| 7: –INB | Inverting input of Amp B | Electrically isolated from Amp A inputs; channel separation −115 dB at 10 kHz prevents crosstalk. |
| 8: OUTB | Amplifier B output | Functionally identical to OUTA; dual outputs support independent gain stages or differential drive. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization with 0 V to 5 V supplies - eliminates level-shifting components in 3.3 V/5 V systems. |
| Low 1 pA input bias current | Maintains accuracy in high-Z sensor interfaces (e.g., pH electrodes, photodiodes) without guard traces or active guarding. |
| 24 MHz bandwidth with unity-gain stability | Supports wideband filtering (e.g., 5-pole anti-aliasing) and fast-settling multiplexer-driven data acquisition. |
| Automotive qualification (−40°C to +125°C) | Guaranteed performance over full AEC-Q100 temperature range - no derating required in engine control or ADAS modules. |
| No phase reversal | Prevents latch-up or oscillation during input overdrive - critical for robustness in industrial sensor fault conditions. |
Applications
| ADC Front Ends | Photodiode Amplifiers |
|---|---|
Use Scenario: Buffering and driving SAR or sigma-delta ADC inputs in portable medical monitors. IC Role / Device Role / Timing Role: Dual-channel precision op amp providing gain, filtering, and drive strength for 12–16 bit converters. Use Value: 24 MHz bandwidth and 11 V/μs slew rate ensure <0.1% settling in <500 ns for 1 MSPS sampling; rail-to-rail output matches ADC input range. |
Use Scenario: Transimpedance amplification of low-light photodiode signals in barcode scanners. IC Role / Device Role / Timing Role: High-impedance TIA stage converting photocurrent to voltage with minimal noise contribution. Use Value: 1 pA input bias current avoids signal loss in >1 GΩ feedback networks; 8 nV/√Hz noise preserves SNR in low-photon-count detection. |
| ASIC Input/Output Amplifiers | Battery-Powered Instrumentation |
Use Scenario: Level-shifting and buffering between mixed-voltage ASIC I/O and external analog subsystems. IC Role / Device Role / Timing Role: Dual op amp isolating ASIC core logic (1.8 V) from sensor interface (3.3 V or 5 V). Use Value: Rail-to-rail input accepts 0–1.8 V ASIC outputs directly; rail-to-rail output drives 3.3 V ADCs without external level shifters. |
Use Scenario: Signal conditioning in handheld multimeters and portable environmental sensors. IC Role / Device Role / Timing Role: Low-power dual amplifier performing gain, offset correction, and filter stages. Use Value: 2 mA per amplifier enables >100-hour battery life on two AA cells; 2.5 mV offset allows factory calibration only once per product lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8642ARMZ-REEL | Same die, 8-lead MSOP package; 2.5 mV max offset, identical 24 MHz GBW and 11 V/μs slew rate. | Smaller footprint (3 × 3 mm vs. 4.9 × 6 mm SOIC); higher θJA (210°C/W) limits power dissipation in dense layouts. | Select when board space is constrained and thermal management permits higher junction rise. |
| OPA2333AIDRGT | Zero-drift architecture; 2 μV max offset, 0.02 μV/°C drift vs. AD8646WARZ-R7's 2.5 mV / 7.5 μV/°C. | Higher cost and 350 kHz GBW limit use to DC–low-frequency precision apps (e.g., weigh scales), not 24 MHz signal paths. | Choose only when microvolt-level offset stability outweighs bandwidth requirements. |
Compared with AD8646WARZ-R7, AD8642ARMZ-REEL offers identical electrical performance in a smaller package but reduced thermal capability, while OPA2333AIDRGT trades bandwidth for ultra-low drift - making AD8646WARZ-R7 optimal for automotive-specified, wideband precision amplification where size and cost are balanced against thermal and speed needs.
Availability
AD8646WARZ-R7 is available at Aetrix Electronics and suitable for automotive sensor modules, portable instrumentation, and industrial ADC front ends requiring stable component supply with guaranteed AEC-Q100 compliance and extended temperature support.
Supply support for AD8646WARZ-R7 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD864x family was designed specifically for precision, wideband, single-supply operation in automotive and portable instrumentation - emphasizing rail-to-rail swing, low noise, and guaranteed operation across −40°C to +125°C.
FAQ
What is the operating temperature range for the AD8646WARZ-R7?
The AD8646WARZ-R7 is qualified for automotive applications with a guaranteed operating temperature range of −40°C to +125°C, as confirmed in the Ordering Guide and Absolute Maximum Ratings table. This rating applies across all electrical specifications including offset voltage, bandwidth, and supply current - no derating is required within this range.
Does the AD8646WARZ-R7 include a shutdown function?
No, the AD8646WARZ-R7 does not include a shutdown function. Only the AD8647 variant (10-lead MSOP) features shutdown pins (SDA/SDB). The AD8646WARZ-R7 is a dual amplifier without enable/disable control - its supply current remains at ≤2.0 mA per amplifier whenever powered.
What package type is used for the AD8646WARZ-R7?
The AD8646WARZ-R7 uses an 8-lead SOIC_N (narrow-body) package, designated R-8 in the Ordering Guide and compliant with JEDEC MS-012-AA. Its dimensions are 4.90 mm × 3.90 mm × 1.75 mm, with 1.27 mm lead pitch and exposed pad omitted - distinct from the MSOP variants (e.g., AD8646ARMZ).
Is the AD8646WARZ-R7 RoHS compliant?
Yes, the "Z" suffix in AD8646WARZ-R7 indicates RoHS compliance per the Ordering Guide footnote: "Z = RoHS Compliant Part." It meets EU Directive 2011/65/EU and contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits.
Can the AD8646WARZ-R7 drive capacitive loads?
Yes, the AD8646WARZ-R7 can drive moderate capacitive loads. Figure 24 and Figure 27 in the datasheet show stable operation with ≤100 pF load capacitance and <5% overshoot at 5 V supply. For >100 pF, external isolation resistance (e.g., 10–50 Ω in series with output) is recommended to maintain phase margin.
AD8646WARZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 11V/µs
- Gain Bandwidth Product:
- 24 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.3 pA
- Voltage - Input Offset:
- 600 µV
- Current - Supply:
- 1.5mA (x2 Channels)
- Current - Output / Channel:
- 120 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
AD8646WARZ-R7 FAQ
1.How can I place an order for AD8646WARZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8646WARZ-R7 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 AD8646WARZ-R7 reliable?
The price and inventory of AD8646WARZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8646WARZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8646WARZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8646WARZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8646WARZ-R7?
AD8646WARZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8646WARZ-R7 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 AD8646WARZ-R7?
For technical support, including AD8646WARZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8646WARZ-R7 requirements.
6.How does Aetrix verify that AD8646WARZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8646WARZ-R7 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 AD8646WARZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8646WARZ-R7?
All AD8646WARZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8646WARZ-R7, 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 AD8646WARZ-R7 part is unused and in its original packaging.
Return procedure for AD8646WARZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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