My Inquiry
My Account
Analog Devices Inc. AD797ARZ-REEL7
- Part No.:
- AD797ARZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD797ARZ-REEL7.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:918
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD797ARZ-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 AD797ARZ-REEL7 datasheet, AD797ARZ-REEL7 pinout, AD797ARZ-REEL7 application, or AD797ARZ-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 validated performance in low-frequency ultrasound and IR imaging signal chains.
Technical Context
The AD797ARZ-REEL7 employs a single-stage complementary bipolar architecture with >5 × 10⁶ open-loop gain, eliminating second-stage noise and distortion contributions. Its internal distortion neutralization network-enabled by the CN capacitor between pins 5 and 6-actively cancels output-stage nonlinearities without compromising stability or frequency response.
This architecture enables simultaneous dc precision (80 μV max VOS, 1.0 μV/°C drift) and wideband dynamic performance (280 kHz full-power bandwidth at 20 Vp-p, 12.5–20 V/μs slew rate), distinguishing it from conventional three-stage precision op amps where gain-bandwidth and settling are trade-offs against noise and distortion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 0.9 nV/√Hz typical at 1 kHz - enables detection of sub-μV signals in low-source-impedance (<1 kΩ) sensor interfaces |
| Total Harmonic Distortion | −120 dB at 20 kHz - preserves spectral purity in professional audio and spectrum analyzer front-ends |
| Settling Time | 800 ns to 0.0015% for 10 V step - supports 16-bit data acquisition at >1 MSPS effective sampling rates |
| Gain Bandwidth Product | 110 MHz at G = 1000 - allows stable closed-loop gain ≥100 with >1 MHz signal bandwidth |
| Output Drive Current | 50 mA - drives 600 Ω loads directly, eliminating need for external buffers in DAC output stages |
| Supply Range | ±5 V to ±15 V - compatible with legacy industrial and test equipment rails while supporting low-voltage designs |
| Input Offset Voltage | 80 μV maximum - ensures <1 LSB error in 16-bit systems with ±10 V full-scale ranges |
Pinout & Package
AD797ARZ-REEL7 is housed in an 8-lead SOIC (R-8) package with standard dual-in-line pinout and exposed pad thermal enhancement. The package has θJA = 120°C/W on a 4-layer JEDEC PCB and supports surface-mount reflow per IPC/JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | Offset Null | Connect external 10 kΩ potentiometer wiper to Pin 1 and ends to Pins 1/8 for VOS trimming; unused pins must be left open |
| 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 critical for noise and CMRR optimization |
| 4 | Negative Supply (−VS) | Return path for negative rail; bypass with 0.1 μF ceramic + 4.7 μF tantalum close to pin |
| 5 | Distortion Neutralization (CN) | Connection point for external capacitor (typically 22 pF) to cancel output-stage distortion |
| 6 | Decompression (DECOMP) | Connection point for same capacitor as Pin 5; forms neutralization network with Pin 5 |
| 7 | Positive Supply (+VS) | Return path for positive rail; identical bypassing required as Pin 4 |
| 6 | Output | Capable of ±13 V swing into 2 kΩ; drives 600 Ω loads with <0.01% THD at 1 kHz |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow voltage noise floor | 0.9 nV/√Hz extends flat to >1 MHz, enabling high-fidelity digitization of wideband sensor outputs without aliasing |
| Active distortion neutralization | On-chip CN/DECOMP network reduces harmonic distortion by >20 dB vs. uncompensated operation at audio frequencies |
| Single-stage high-gain architecture | Eliminates second-stage noise folding, preserving 16-bit settling integrity up to 110 MHz GBW |
| High output current capability | 50 mA drive sustains full-swing performance into 600 Ω loads, simplifying Σ-Δ DAC output buffering |
| Wide supply range compatibility | Operates from ±5 V to ±15 V with monotonic PSRR >114 dB, easing integration into mixed-rail systems |
Applications
| Professional Audio Preamp | Ultrasound Signal Chain |
|---|---|
Use Scenario: Low-noise microphone preamplifier stage in broadcast mixing consoles requiring >130 dB dynamic range. IC Role / Device Role / Timing Role: Primary gain stage amplifying mV-level capsule outputs before ADC conversion. Use Value: 0.9 nV/√Hz noise and −120 dB THD preserve harmonic integrity of vocal transients and instrument harmonics. | Use Scenario: Receive-path amplifier in portable ultrasound machines digitizing 1–15 MHz echo signals. IC Role / Device Role / Timing Role: First-stage LNA before programmable gain amplifier and anti-alias filter. Use Value: 800 ns 16-bit settling and 280 kHz full-power bandwidth support high-resolution B-mode image reconstruction. |
| Seismic Detector Front-End | Σ-Δ ADC Buffer |
Use Scenario: Charge-amplifier interface for geophone sensors capturing sub-Hz ground motion in oil exploration arrays. IC Role / Device Role / Timing Role: Ultra-low-drift integrator and signal conditioner preceding 24-bit Σ-Δ ADC. Use Value: 1.0 μV/°C VOS drift and 50 nVp-p 0.1–10 Hz noise ensure stable baseline over multi-hour acquisitions. | Use Scenario: Output buffer for high-resolution DACs in precision calibration equipment and metrology instruments. IC Role / Device Role / Timing Role: Isolation and drive stage preventing DAC output loading from degrading INL/DNL. Use Value: 50 mA output current and 20 V/μs slew rate maintain linearity during fast full-scale transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultralow-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8597ARZ | 1.1 nV/√Hz noise, −115 dB THD at 20 kHz, 10 MHz GBW, lower quiescent current (3.5 mA) | Better suited for battery-powered instrumentation where power efficiency outweighs ultimate noise floor | Select AD8597ARZ when 0.2 nV/√Hz noise penalty is acceptable and supply current must stay below 4 mA |
| ADA4004-1ARZ | 1.8 nV/√Hz noise, −105 dB THD at 20 kHz, 12 MHz GBW, rail-to-rail output | Preferred for single-supply systems requiring output swing to within 50 mV of rails | Choose ADA4004-1ARZ only if rail-to-rail output is mandatory and noise >1.5 nV/√Hz is tolerable |
Compared with AD8597ARZ and ADA4004-1ARZ, AD797ARZ-REEL7 provides the lowest noise and highest linearity but consumes more power (10.5 mA) and requires dual supplies; it remains the benchmark for applications where dynamic range is constrained by noise floor rather than power or supply architecture.
Availability
AD797ARZ-REEL7 is available at Aetrix Electronics and suitable for professional audio preamplifiers, seismic detection systems, ultrasound imaging front-ends, and Σ-Δ ADC buffer applications requiring stable component supply across long production lifecycles.
Supply support for AD797ARZ-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 AD797ARZ-REEL7 belongs to Analog Devices' precision op amp product line, engineered specifically for applications demanding the widest possible dynamic range in sensor signal conditioning, measurement instrumentation, and high-fidelity audio.
FAQ
What is the maximum recommended source resistance for optimal noise performance of the AD797ARZ-REEL7?
The AD797ARZ-REEL7 achieves minimum total input-referred noise when source resistance is kept below 1 kΩ. At RS < 50 Ω, voltage noise dominates; above 2 kΩ, current noise becomes dominant. Figure 34 in the AD797 datasheet shows total noise rises sharply beyond 1 kΩ, confirming that AD797ARZ-REEL7 is optimized for low-Z sensors like piezoelectric transducers and photodiode TIA feedback networks.
Does the AD797ARZ-REEL7 require external compensation capacitors for stability in unity-gain configuration?
Yes, the AD797ARZ-REEL7 requires a 100 Ω series resistor in the inverting input path for stability in unity-gain follower configurations, as specified in Figure 37 of the datasheet. While not strictly a capacitor, this resistor damps reactive interactions; adding a small capacitor (<33 pF) across it further improves flatness. The CN and DECOMP pins (5 and 6) must be connected with a 22 pF capacitor to enable distortion neutralization, but this does not affect stability.
Can the AD797ARZ-REEL7 operate from a single +10 V supply?
No, the AD797ARZ-REEL7 is not specified for single-supply operation. Its input common-mode range is ±11 V at ±15 V supplies and ±2.5 V at ±5 V supplies, and absolute maximum ratings prohibit operation with only one supply rail. Attempting single-supply use violates the ±VS input voltage limit and risks latch-up. For single-supply applications, consider the ADA4004-1ARZ or AD8675 instead of AD797ARZ-REEL7.
What is the purpose of Pins 5 and 6 (CN and DECOMP) on the AD797ARZ-REEL7?
Pins 5 (CN) and 6 (DECOMP) form the distortion neutralization network. Connecting a capacitor (typically 22 pF) between them cancels third-harmonic distortion generated by the output stage, improving THD by >20 dB at 20 kHz. This network operates independently of stability compensation and does not alter gain or bandwidth; its function is verified in Figure 33 and Theory of Operation section of the AD797 datasheet.
Is the AD797ARZ-REEL7 pin-compatible with older AD797 variants like AD797ANZ or AD797BNZ?
Yes, AD797ARZ-REEL7 shares identical pinout and footprint with AD797ANZ (PDIP) and AD797BNZ (SOIC), as confirmed by Figure 2 in the datasheet. All variants use the same 8-pin DIP/SOIC layout with Offset Null (Pins 1/8), −IN (2), +IN (3), −VS (4), CN (5), DECOMP (6), +VS (7), and OUTPUT (6). However, electrical specifications differ: AD797ARZ-REEL7 guarantees 80 μV max VOS and 0.9 nV/√Hz noise, whereas AD797BNZ specifies looser limits.
AD797ARZ-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:
- 25 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
AD797ARZ-REEL7 FAQ
1.How can I place an order for AD797ARZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD797ARZ-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 AD797ARZ-REEL7 reliable?
The price and inventory of AD797ARZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD797ARZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD797ARZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD797ARZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD797ARZ-REEL7?
AD797ARZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD797ARZ-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 AD797ARZ-REEL7?
For technical support, including AD797ARZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD797ARZ-REEL7 requirements.
6.How does Aetrix verify that AD797ARZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD797ARZ-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 AD797ARZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD797ARZ-REEL7?
All AD797ARZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD797ARZ-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 AD797ARZ-REEL7 part is unused and in its original packaging.
Return procedure for AD797ARZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD797ARZ-REEL7 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
