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Analog Devices Inc. AD797BRZ-REEL7
- Part No.:
- AD797BRZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD797BRZ-REEL7.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,386
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Product details
Overview
AD797BRZ-REEL7 from Analog Devices is an ultralow-noise, ultralow-distortion precision operational amplifier designed for high-fidelity signal conditioning in demanding analog front-ends. It delivers 0.9 nV/√Hz input voltage noise at 1 kHz, −120 dB THD at 20 kHz, and 800 ns 16-bit settling time, making it ideal for microphone preamplifiers, seismic detector front-ends, and Σ-Δ ADC buffer stages.
For engineers reviewing the AD797BRZ-REEL7 datasheet, AD797BRZ-REEL7 pinout, AD797BRZ-REEL7 application, or AD797BRZ-REEL7 equivalent, key selection criteria include its 20 V/μs slew rate, ±5 V to ±15 V dual-supply operation, 50 mA output drive, 110 MHz gain bandwidth (G = 1000), and specified performance across −40°C to +85°C industrial temperature range.
Technical Context
The AD797BRZ-REEL7 employs a single-stage complementary bipolar architecture with pairwise device matching to achieve simultaneous dc precision and dynamic performance-eliminating second-stage noise contributions and enabling flat voltage noise spectral density up to >1 MHz. Its distortion neutralization network (CN capacitor) actively cancels output-stage nonlinearities without compromising stability.
This architecture yields 20 V/μs slew rate, 110 MHz gain bandwidth at G = 1000, and true 16-bit settling in ≤800 ns while maintaining 80 μV max input offset voltage and 1.0 μV/°C drift-enabling high-resolution signal acquisition in ultrasound, IR imaging, and spectrum analysis systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 0.9 nV/√Hz @ 1 kHz - enables detection of sub-μV signals in low-source-impedance sensor interfaces |
| Total Harmonic Distortion | −120 dB @ 20 kHz - preserves audio and ultrasonic waveform fidelity in professional preamps and DAC buffers |
| Slew Rate | 20 V/μs - supports fast transient response in wideband instrumentation and pulse amplification |
| Gain Bandwidth Product | 110 MHz @ G = 1000 - allows stable high-gain, high-speed closed-loop configurations |
| Input Offset Voltage | 80 μV max - ensures minimal dc error in precision dc-coupled measurement paths |
| Output Drive Current | 50 mA - drives low-impedance loads (e.g., 600 Ω cables, ADC reference buffers) without gain compression |
| Supply Voltage Range | ±5 V to ±15 V - compatible with legacy industrial and audio power rails |
Pinout & Package
AD797BRZ-REEL7 is housed in an 8-lead SOIC (R-8) package with standard op amp pinout and two offset null pins for precision trimming. Thermal resistance is θJA = 120°C/W on 4-layer JEDEC PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | Offset Null | Connect external potentiometer (10 kΩ) between Pins 1 and 8, wiper to −VS for VOS adjustment |
| 2 | Inverting Input (−IN) | Differential input node; requires 100 Ω series resistor in noninverting config for stability |
| 3 | Noninverting Input (+IN) | Differential input node; matched source impedance recommended for optimal noise and CMRR |
| 4 | Negative Supply (−VS) | Return path for negative rail; Kelvin connection recommended for high-current loads |
| 5 | Output | Capable of ±13 V swing into 2 kΩ; drives 600 Ω loads with ≥±11 V swing |
| 6 | Positive Supply (+VS) | Return path for positive rail; bypass with 0.1 μF ceramic + 4.7 μF tantalum per supply |
| 7 | Decompensation & Distortion Neutralization | Connect CN capacitor (typically 10–100 pF) from Pin 7 to Pin 5 to cancel output-stage distortion |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow voltage noise floor | 0.9 nV/√Hz @ 1 kHz extends usable bandwidth beyond 1 MHz for sampled-data systems |
| Active distortion neutralization | Pin 7 CN capacitor eliminates output-stage harmonic distortion without degrading phase margin |
| Single-stage high-gain architecture | Eliminates second-stage noise contribution and enables 16-bit settling in 800 ns |
| High output current capability | 50 mA drive sustains linearity into 600 Ω loads-critical for driving ADC inputs and coaxial cables |
| Wide supply range compatibility | Operates from ±5 V to ±15 V, supporting both low-power portable and high-dynamic-range bench systems |
Applications
| Professional Audio Preamp | Ultrasound Signal Chain |
|---|---|
Use Scenario: Low-noise amplification of condenser microphone outputs in recording studio mixing consoles. IC Role / Device Role / Timing Role: Primary preamplifier stage providing 40–60 dB gain with minimal added noise and distortion. Use Value: 0.9 nV/√Hz input noise and −120 dB THD preserve full dynamic range of high-end microphones without coloration. | Use Scenario: Front-end amplification of weak echo signals in diagnostic ultrasound beamformers. IC Role / Device Role / Timing Role: Time-critical transducer interface amplifier requiring fast settling and wide bandwidth. Use Value: 800 ns 16-bit settling and 280 kHz full-power bandwidth enable accurate sampling of short-duration echoes. |
| Seismic Data Acquisition | Σ-Δ ADC Buffer |
Use Scenario: Amplifying nanovolt-level geophone outputs in oil exploration and earthquake monitoring arrays. IC Role / Device Role / Timing Role: First-stage low-noise amplifier before programmable-gain instrumentation amplifier and ADC. Use Value: 50 nVp-p (0.1–10 Hz) low-frequency noise ensures resolution of slow earth-motion signals. | Use Scenario: Driving the analog input of 24-bit Σ-Δ ADCs (e.g., AD7768) in precision data loggers. IC Role / Device Role / Timing Role: High-impedance, low-distortion buffer isolating ADC from source impedance variations. Use Value: 50 mA output drive and 1.0 μV/°C VOS drift maintain accuracy across temperature and load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8597ARZ | 0.95 nV/√Hz noise, −115 dB THD @ 20 kHz, 10 MHz GBW, lower quiescent current (3.5 mA) | Better suited for battery-powered low-power precision sensors where bandwidth <10 MHz suffices | Select AD8597ARZ when power budget is constrained and full AD797BRZ-REEL7 bandwidth is unnecessary |
| ADA4004-1ARZ | 1.8 nV/√Hz noise, −105 dB THD @ 20 kHz, 12 MHz GBW, rail-to-rail output | Preferred for single-supply systems and applications requiring output swing to within 100 mV of rails | Choose ADA4004-1ARZ for cost-sensitive industrial sensors needing rail-to-rail output but tolerating higher noise |
Compared with AD8597ARZ and ADA4004-1ARZ, the AD797BRZ-REEL7 provides superior noise and distortion performance at the expense of higher supply current (10.5 mA) and dual-supply requirement-making it the benchmark choice for metrology-grade signal chains where dynamic range is paramount.
Availability
AD797BRZ-REEL7 is available at Aetrix Electronics and suitable for professional audio equipment, medical ultrasound systems, seismic monitoring hardware, and high-resolution data acquisition requiring stable component supply across extended production lifecycles.
Supply support for AD797BRZ-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 AD797BRZ-REEL7 belongs to Analog Devices' precision op amp product line, engineered specifically for applications demanding the widest possible dynamic range-such as scientific instrumentation, audio mastering, and high-fidelity test equipment.
FAQ
What is the maximum supply voltage rating for AD797BRZ-REEL7?
The AD797BRZ-REEL7 has an absolute maximum supply voltage rating of ±18 V. Operation is specified over ±5 V to ±15 V, with quiescent current increasing linearly across that range. Exceeding ±18 V risks permanent damage to the internal complementary bipolar junction transistors.
Does AD797BRZ-REEL7 require external compensation capacitors?
Yes-the AD797BRZ-REEL7 requires an external capacitor (CN) connected from Pin 7 (Decompensation & Distortion Neutralization) to Pin 5 (Output) to achieve optimal distortion cancellation. Typical values range from 10 pF to 100 pF depending on gain and load; omitting CN increases THD by up to 20 dB at 20 kHz.
Can AD797BRZ-REEL7 operate from a single 12 V supply?
No-AD797BRZ-REEL7 is not characterized for single-supply operation. Its input common-mode range is ±11 V to ±12 V with ±15 V supplies and shrinks to ±2.5 V to ±3 V with ±5 V supplies. Single-ended 12 V operation violates the required symmetric rail configuration and risks input stage saturation.
What is the purpose of Pins 1 and 8 on AD797BRZ-REEL7?
Pins 1 and 8 are offset null terminals. A 10 kΩ potentiometer is connected between them, with its wiper tied to −VS, allowing manual trimming of input offset voltage down to <10 μV. This is essential in dc-coupled precision measurement circuits where residual VOS must be minimized.
How does AD797BRZ-REEL7 achieve 16-bit settling in 800 ns?
The AD797BRZ-REEL7 achieves 800 ns 16-bit settling via its single-stage ultrahigh-gain architecture (>5 × 10⁶ open-loop gain), which eliminates second-stage delay and phase shift. Combined with 20 V/μs slew rate and optimized internal device matching, this enables monotonic settling to 0.0015% error after a 10 V step under ±15 V supplies.
AD797BRZ-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:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 20V/µs
- Gain Bandwidth Product:
- 110 MHz
- -3db Bandwidth:
- 8 MHz
- Current - Input Bias:
- 250 nA
- Voltage - Input Offset:
- 10 µV
- Current - Supply:
- 8.2mA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD797BRZ-REEL7 FAQ
1.How can I place an order for AD797BRZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD797BRZ-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 AD797BRZ-REEL7 reliable?
The price and inventory of AD797BRZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD797BRZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD797BRZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD797BRZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD797BRZ-REEL7?
AD797BRZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD797BRZ-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 AD797BRZ-REEL7?
For technical support, including AD797BRZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD797BRZ-REEL7 requirements.
6.How does Aetrix verify that AD797BRZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD797BRZ-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 AD797BRZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD797BRZ-REEL7?
All AD797BRZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD797BRZ-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 AD797BRZ-REEL7 part is unused and in its original packaging.
Return procedure for AD797BRZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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