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Analog Devices Inc. AD9631ARZ-REEL7
- Part No.:
- AD9631ARZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD9631ARZ-REEL7.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,029
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Product details
Overview
AD9631ARZ-REEL7 from Analog Devices is a unity-gain-stable, ultralow-distortion voltage feedback op amp optimized for high-fidelity signal conditioning in precision ADC/DAC interfaces. It delivers 320 MHz small-signal bandwidth, −72 dBc third-harmonic distortion at 20 MHz, and 1300 V/µs slew rate, enabling accurate buffering of fast-rising video, IF, and baseband waveforms into 12-bit flash ADCs.
For engineers reviewing the AD9631ARZ-REEL7 datasheet, AD9631ARZ-REEL7 pinout, AD9631ARZ-REEL7 application, or AD9631ARZ-REEL7 equivalent, key selection criteria include G = +1 stability, 16 ns settling to 0.01%, ±3 V to ±5 V dual-supply operation, and SOIC-8 packaging with NC pins at positions 1 and 5 - all critical for high-speed analog front-end design.
Technical Context
The AD9631ARZ-REEL7 uses a proprietary voltage feedback architecture that merges classical op amp predictability with current-feedback-like pulse response. Its 65° phase margin ensures stable unity-gain operation without external compensation, while on-demand slew current enables 1300 V/µs performance independent of quiescent bias.
It achieves ultralow harmonic distortion via balanced high-impedance inputs and low-noise input stage (7.0 nV/√Hz), supporting wideband applications where spectral purity and transient fidelity are co-constrained - such as professional video line driving and IF amplifier stages requiring <0.02% differential gain error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal BW (−3 dB) | 320 MHz @ G = +1, VOUT ≤ 0.4 Vp-p: supports >100 MSPS sampling with minimal amplitude roll-off. |
| Slew rate | 1300 V/µs: enables full-scale 4 Vp-p transitions in <3 ns, critical for pulse and video amplification. |
| THD @ 20 MHz | −72 dBc @ RL = 500 Ω: preserves SNR in 12-bit ADC driver applications up to Nyquist frequency. |
| Settling time | 16 ns to 0.01% on 2 V step: meets timing budget for sub-62.5 ns conversion cycles in high-speed data acquisition. |
| Input noise density | 7.0 nV/√Hz: limits added noise floor when amplifying µV-level sensor or DAC outputs. |
| Supply range | ±3 V to ±5 V: compatible with standard analog supply rails and simplifies power domain partitioning. |
| Quiescent current | 17 mA: balances speed and power in thermally constrained PCB layouts. |
Pinout & Package
AD9631ARZ-REEL7 is housed in an 8-lead SOIC (R) package with exposed pad (RoHS-compliant, lead-free). Pin 1 and Pin 5 are no-connect (NC); functional terminals follow standard op amp topology with symmetrical high-impedance inputs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect | Internally unconnected; must remain floating per datasheet to avoid parasitic coupling. |
| 2 | Inverting Input (−IN) | High-impedance node (500 kΩ) for feedback network connection; sensitive to layout-induced capacitance. |
| 3 | Noninverting Input (+IN) | High-impedance node (500 kΩ); requires matched trace length and guard ring for optimal CMRR. |
| 4 | −VS | Negative supply rail; requires local 0.1 µF + 10 µF bypassing to suppress high-frequency PSRR degradation. |
| 5 | No Connect | Internally unconnected; must remain floating to prevent unintended substrate coupling. |
| 6 | Output | Capable of ±3.9 V swing into 150 Ω; drives 100 Ω loads directly but benefits from series R for capacitive loads. |
| 7 | +VS | Positive supply rail; same bypassing requirements as −VS; shared ground return path affects PSRR. |
| 8 | Not assigned | SOIC-8 thermal pad (exposed die attach); must be soldered to PCB ground plane for thermal and EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| G = +1 unity-gain stability | Eliminates need for external compensation components, reducing BOM count and layout sensitivity in buffer configurations. |
| 16 ns settling to 0.01% | Enables direct interface with 12-bit ADCs operating at ≥62.5 MSPS without additional sample-and-hold circuitry. |
| −72 dBc THD @ 20 MHz | Maintains >70 dB SFDR in IF amplifier stages, preserving dynamic range for LTE/WiFi receiver front ends. |
| Differential gain/phase error | 0.02%/0.02° @ 3.58 MHz: satisfies SMPTE 253M and ITU-R BT.601 broadcast video line driver specifications. |
| 7.0 nV/√Hz input noise | Minimizes contribution to system noise floor when amplifying low-level DAC current outputs or photodiode signals. |
Applications
| ADC Input Driver | Differential Amplifier |
|---|---|
Use Scenario: Driving the analog input of a 12-bit, 105 MSPS flash ADC in a software-defined radio receiver. IC Role / Device Role / Timing Role: High-fidelity buffer isolating FPGA-controlled DAC output from ADC input, maintaining signal integrity across 0–50 MHz IF band. Use Value: 320 MHz bandwidth and 16 ns settling ensure <0.5 LSB error during acquisition window; −72 dBc distortion prevents harmonic folding into baseband. | Use Scenario: Converting single-ended IF signals to balanced drive for high-speed ADCs with differential inputs. IC Role / Device Role / Timing Role: Precision gain-of-two inverter with matched input impedance, used in I/Q demodulator output stage. Use Value: 0.02° phase nonlinearity and 65° phase margin preserve quadrature accuracy; 1300 V/µs slew handles 4 Vp-p envelope peaks without slewing distortion. |
| Professional Video Line Driver | Pulse Amplifier |
Use Scenario: Driving 75 Ω coaxial cable in HD-SDI camera back-end processing with SMPTE 292M compliance. IC Role / Device Role / Timing Role: Unity-gain video buffer with DC-coupled output, placed immediately before connector to minimize stub reflections. Use Value: 0.02% differential gain and 0.02° differential phase meet broadcast-grade color fidelity; 1300 V/µs slew supports 1.485 Gbps serial digital video transitions. | Use Scenario: Amplifying nanosecond-rise-time laser diode trigger pulses in time-of-flight measurement systems. IC Role / Device Role / Timing Role: Fast-settling pulse conditioner shaping TTL logic edges into clean 4 Vp-p, 2 ns rise-time analog pulses. Use Value: 1.2 ns rise time and 16 ns 0.01% settling eliminate pulse width distortion; low input capacitance (1.2 pF) minimizes loading on preceding logic gate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage feedback op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6702MF/NOPB | Higher 1.7 GHz GBW but G ≥ 5 stable only; 10.5 nV/√Hz noise; 2.2 mA lower IQ. | Requires minimum gain of 5; unsuitable for unity-gain buffer roles like ADC input staging. | Select LMH6702MF/NOPB only when closed-loop gain ≥5 is acceptable and higher bandwidth justifies reduced DC precision. |
| ADA4898-1ARZ | Lower 290 MHz BW; superior 0.9 nV/√Hz noise; 1000 V/µs slew; G = +1 stable. | Better for low-noise, medium-speed applications (e.g., sensor signal chain); less suited for >100 MSPS ADC drivers. | Choose ADA4898-1ARZ when noise dominates over speed - e.g., precision instrumentation amplifiers - not high-speed data converters. |
Compared with LMH6702MF/NOPB and ADA4898-1ARZ, AD9631ARZ-REEL7 uniquely balances unity-gain stability, 320 MHz bandwidth, and −72 dBc distortion at 20 MHz - making it the only option among the three qualified for G = +1 ADC input buffering with sub-16 ns settling and broadcast video line driving.
Availability
AD9631ARZ-REEL7 is available at Aetrix Electronics and suitable for high-speed data acquisition, professional video infrastructure, and IF/RF signal conditioning requiring stable component supply across industrial temperature ranges (−40°C to +85°C).
Supply support for AD9631ARZ-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 AD9631ARZ-REEL7 belongs to Analog Devices' precision high-speed op amp product line, engineered specifically for demanding signal chain applications where bandwidth, distortion, and settling time must coexist at G = +1 - including ADC/DAC interface, video, and communications infrastructure.
FAQ
What is the maximum recommended supply voltage for AD9631ARZ-REEL7?
The AD9631ARZ-REEL7 has an absolute maximum supply voltage rating of ±6.0 V, but its specified operating range is ±3.0 V to ±5.0 V. Operation at ±5.0 V delivers optimal dynamic performance (320 MHz bandwidth, −72 dBc distortion), while ±3.0 V reduces quiescent current to ~16 mA at the cost of ~15% bandwidth reduction. Exceeding ±6.0 V risks permanent damage per Absolute Maximum Ratings Table 2.
Does AD9631ARZ-REEL7 require external compensation for unity-gain stability?
No, AD9631ARZ-REEL7 is internally compensated for unity-gain (G = +1) stability and does not require external capacitors or resistors for basic operation. Its 65° phase margin ensures robust stability with standard feedback networks. However, for transimpedance configurations (e.g., photodiode amplification), a shunt capacitor across the feedback resistor may be needed to suppress peaking caused by input capacitance.
What is the function of Pins 1 and 5 on AD9631ARZ-REEL7?
Pins 1 and 5 of AD9631ARZ-REEL7 are designated No Connect (NC) and are internally unconnected. They must remain electrically floating - neither tied to ground nor supply - to prevent parasitic coupling or unintended substrate currents. The SOIC-8 package's exposed thermal pad (Pin 8) is not a signal pin and must be soldered to a PCB ground plane for thermal management and EMI control.
Can AD9631ARZ-REEL7 drive a 50 Ω load directly?
Yes, AD9631ARZ-REEL7 can drive a 50 Ω load directly, delivering ±3.2 V output swing with 70 mA output current capability. However, for optimal large-signal bandwidth (175 MHz) and minimal distortion, a series resistor (10–25 Ω) is recommended between the output and 50 Ω load to dampen potential peaking caused by trace inductance and load capacitance - especially in RF or high-speed digital test equipment applications.
How does AD9631ARZ-REEL7 perform in video line driving applications?
AD9631ARZ-REEL7 meets broadcast-grade video specifications: 0.02% differential gain error and 0.02° differential phase error at 3.58 MHz into 150 Ω, satisfying SMPTE 253M and ITU-R BT.601. Its 1300 V/µs slew rate supports 1.485 Gbps HD-SDI transitions, and 320 MHz bandwidth ensures flat response across the entire 0–30 MHz video spectrum - making AD9631ARZ-REEL7 suitable for HD camera signal chains and video switcher outputs.
AD9631ARZ-REEL7 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:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1300V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 320 MHz
- Current - Input Bias:
- 2 µA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 17mA
- Current - Output / Channel:
- 70 mA
- Voltage - Supply Span (Min):
- 6 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD9631ARZ-REEL7 FAQ
1.How can I place an order for AD9631ARZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9631ARZ-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 AD9631ARZ-REEL7 reliable?
The price and inventory of AD9631ARZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9631ARZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD9631ARZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9631ARZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9631ARZ-REEL7?
AD9631ARZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9631ARZ-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 AD9631ARZ-REEL7?
For technical support, including AD9631ARZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9631ARZ-REEL7 requirements.
6.How does Aetrix verify that AD9631ARZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD9631ARZ-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 AD9631ARZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD9631ARZ-REEL7?
All AD9631ARZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD9631ARZ-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 AD9631ARZ-REEL7 part is unused and in its original packaging.
Return procedure for AD9631ARZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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