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Analog Devices Inc. AD8663ARZ-REEL
- Part No.:
- AD8663ARZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8663ARZ-REEL.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,031
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Product details
Overview
AD8663ARZ-REEL from Analog Devices is a single-channel, rail-to-rail output, precision CMOS operational amplifier optimized for low-noise, low-input-bias-current sensor signal conditioning. It delivers 175 µV max offset voltage, 23 nV/√Hz voltage noise density, and 300 fA typical input bias current at 5 V supply, operating across 5 V to 16 V single or ±2.5 V to ±8 V dual supplies. It is widely deployed in photodiode amplification and pH meter front ends.
For engineers reviewing the AD8663ARZ-REEL datasheet, AD8663ARZ-REEL pinout, AD8663ARZ-REEL application, or AD8663ARZ-REEL equivalent, key selection criteria include verified rail-to-rail output swing (≤25 mV from rails at 100 µA), guaranteed −40°C to +125°C operation, DigiTrim®-enabled offset stability, and SOIC-8 package compatibility with standard PCB footprints.
Technical Context
The AD8663ARZ-REEL employs Analog Devices' patented DigiTrim® trimming to achieve low offset voltage without laser trimming, enabling high precision across temperature. Its CMOS input stage delivers femtoampere-level input bias current and supports high-impedance sources such as photodiodes and pH electrodes.
It features unity-gain stability with 520 kHz gain-bandwidth product and 0.26 V/µs slew rate at 5 V, and maintains rail-to-rail output drive into 2 kΩ loads across its full 5–16 V supply range. Input common-mode range extends to within 0.2 V of V− and 3.0 V below V+ at 5 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 175 µV max @ 5 V - ensures ≤0.5 mV error in 100 mV full-scale sensor outputs without calibration |
| Input Bias Current | 300 fA typ - enables stable operation with >1 GΩ source impedances (e.g., glass pH electrodes) |
| Voltage Noise Density | 23 nV/√Hz @ 1 kHz - preserves SNR in low-level transducer signals below 100 µV |
| Supply Range | 5 V to 16 V single supply - supports direct interface with industrial 12 V rails and battery-powered 5 V systems |
| Output Swing | Within 25 mV of rails @ 100 µA - maximizes dynamic range when driving SAR ADCs with 0–5 V input ranges |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, industrial process control, and medical diagnostics |
| Gain-Bandwidth Product | 520 kHz @ 5 V - sufficient for anti-aliasing filtering and DC-coupled transimpedance stages up to ~50 kHz |
Pinout & Package
AD8663ARZ-REEL is housed in an 8-lead narrow-body SOIC (R-8) package per JEDEC MS-012-AA, with exposed pad electrically isolated and recommended to be connected to V− or left floating per datasheet Note 2.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect (NC) | Internally unconnected; must remain unconnected on PCB per datasheet Note 1 |
| 2 | Inverting Input (−IN) | Differential input node; high-impedance CMOS input requiring guarded trace routing |
| 3 | Noninverting Input (+IN) | Differential input node; matched to Pin 2 for optimal CMRR performance |
| 4 | Negative Supply (V−) | Reference for input common-mode and output swing; connects to ground or negative rail |
| 5 | No Connect (NC) | Internally unconnected; must remain unconnected on PCB |
| 6 | Output (OUT) | Rail-to-rail output capable of sourcing/sinking ≥1 mA while maintaining <200 mV saturation |
| 7 | Positive Supply (V+) | Power supply input; supports 5–16 V; decoupling capacitor required within 1 cm |
| 8 | No Connect (NC) | Internally unconnected; must remain unconnected on PCB |
Key Features
| Feature | Design Value |
|---|---|
| DigiTrim® offset calibration | Eliminates need for external nulling circuitry and reduces production test time for precision sensor modules |
| Rail-to-rail output stage | Delivers full 4.95 V swing from 5 V supply, increasing usable ADC input range by >10% vs. legacy op amps |
| Low 23 nV/√Hz noise | Enables sub-10 µV resolution in 1 Hz–10 kHz bandwidths typical of electrochemical sensor readouts |
| 300 fA input bias current | Prevents significant voltage error across 10 GΩ pH probe impedances (<0.3 mV drift over 24 h) |
| −40°C to +125°C operation | Validated for use in engine control units, industrial pressure transmitters, and portable diagnostic devices |
Applications
| Photodiode Amplification | pH and ORP Meter Front End |
|---|---|
|
Use Scenario: Converting weak current from silicon photodiodes (nA–µA range) into stable voltage for ADC digitization in spectrophotometers. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input bias current and low voltage noise to preserve signal integrity. Use Value: 300 fA bias current prevents diode leakage-induced offset drift; 23 nV/√Hz noise enables detection of <100 nA photocurrents at 1 kHz. |
Use Scenario: Buffering high-impedance glass electrode outputs (≥1 GΩ) in handheld pH meters and lab-grade analyzers. IC Role / Device Role / Timing Role: High-impedance voltage follower with rail-to-rail output to drive ADC reference inputs without attenuation. Use Value: 300 fA input bias current limits measurement error to <1 mV on 1 GΩ electrodes; 175 µV offset ensures ±0.01 pH accuracy. |
| Low-Power ADC Driver | Medical Diagnostic Instrumentation |
|
Use Scenario: Driving SAR ADC inputs in battery-powered wearable sensors where supply headroom is limited to 3.3 V or 5 V. IC Role / Device Role / Timing Role: Precision buffer with rail-to-rail output swing and low quiescent current to minimize system power. Use Value: 275 µA max supply current extends battery life; 25 mV output saturation at 100 µA ensures >99% of 0–5 V ADC range is utilized. |
Use Scenario: Signal conditioning in portable ECG front ends and impedance plethysmography modules requiring low drift and biocompatibility. IC Role / Device Role / Timing Role: DC-coupled gain stage and offset adjust amplifier with low TCVOS (1.5 µV/°C) for thermal stability. Use Value: 1.5 µV/°C offset drift prevents >0.5 µV/min baseline wander during 10-minute clinical measurements at ambient temperature shifts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | Lower 17 µV max offset but higher 65 nV/√Hz noise; 50 pA input bias current vs. 300 fA | Better for low-offset DC gain stages; unsuitable for >1 GΩ pH or photodiode sources due to bias current | Select OPA333AIDBVR only when offset dominates noise/bias requirements and source Z < 100 MΩ |
| LTC6241HS5#TRMPBF | Higher 4.2 nV/√Hz noise but lower 0.5 fA bias current; wider 2.8–12 V supply range | Preferred for ultra-high-Z electrometer applications; less suitable for 12–16 V industrial rails | Choose LTC6241HS5#TRMPBF when bias current < 1 fA is mandatory and supply ≤12 V |
Compared with OPA333AIDBVR and LTC6241HS5#TRMPBF, AD8663ARZ-REEL uniquely balances femtoampere input bias, sub-25 nV/√Hz noise, and 16 V supply capability-making it the only option qualified for 12 V-powered pH meters with <0.02 pH error and photodiode amps requiring >100 dB CMRR at 10 kHz.
Availability
AD8663ARZ-REEL is available at Aetrix Electronics and suitable for photodiode amplification, pH/ORP meter design, and low-power ADC driver applications requiring stable component supply across automotive, industrial, and medical production programs.
Supply support for AD8663ARZ-REEL 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, with R&D and manufacturing operations worldwide.
The AD866x family was engineered specifically for precision, low-power, high-impedance sensor interfaces-including electrochemical, optical, and medical transducers-where femtoampere bias current and rail-to-rail output are non-negotiable.
FAQ
What is the maximum supply voltage rating for AD8663ARZ-REEL?
The AD8663ARZ-REEL has an absolute maximum supply voltage of 18 V, with recommended operating range from 5 V to 16 V single supply (or ±2.5 V to ±8 V dual supply). Operation beyond 16 V is not characterized and may degrade long-term reliability or increase input bias current drift.
Does AD8663ARZ-REEL support rail-to-rail input common-mode range?
No, AD8663ARZ-REEL supports rail-to-rail *output* swing but not rail-to-rail input. At 5 V supply, its input common-mode range is specified from 0.2 V to 3.0 V (i.e., within 0.2 V of V− and 2.0 V below V+). This limitation is inherent to its CMOS input architecture and must be accounted for in level-shifting designs.
Is the exposed pad on AD8663ARZ-REEL electrically connected?
No-the exposed pad on the AD8663ARZ-REEL (SOIC-8 R-8 package) is not internally connected to any die node. Per Analog Devices datasheet Figure 43 and Note 2, it may be soldered to V− for improved thermal performance or left unconnected; it must never be tied to V+ or signal nets.
What is the typical input offset voltage drift (TCVOS) of AD8663ARZ-REEL over temperature?
The AD8663ARZ-REEL has a guaranteed maximum offset voltage drift of 5 µV/°C over −40°C to +125°C, with typical performance at 1.5 µV/°C. This low drift enables stable DC gain accuracy in uncalibrated medical and industrial instruments operating across wide ambient temperature ranges.
Can AD8663ARZ-REEL drive capacitive loads directly?
AD8663ARZ-REEL is unity-gain stable but exhibits increasing overshoot with capacitive loads >100 pF. For loads >200 pF, a series resistor (typically 10–50 Ω) between the output and load is recommended to maintain phase margin >60° and prevent oscillation, as confirmed in Figures 25 and 28 of the datasheet.
AD8663ARZ-REEL 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:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.3V/µs
- Gain Bandwidth Product:
- 540 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.3 pA
- Voltage - Input Offset:
- 40 µV
- Current - Supply:
- 230µA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8663ARZ-REEL FAQ
1.How can I place an order for AD8663ARZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8663ARZ-REEL 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 AD8663ARZ-REEL reliable?
The price and inventory of AD8663ARZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8663ARZ-REEL is usually 5 days.
3.What payment methods are accepted for AD8663ARZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8663ARZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8663ARZ-REEL?
AD8663ARZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8663ARZ-REEL 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 AD8663ARZ-REEL?
For technical support, including AD8663ARZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8663ARZ-REEL requirements.
6.How does Aetrix verify that AD8663ARZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD8663ARZ-REEL 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 AD8663ARZ-REEL meets industry standards.
7.What is the process for return or replacement of AD8663ARZ-REEL?
All AD8663ARZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8663ARZ-REEL, 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 AD8663ARZ-REEL part is unused and in its original packaging.
Return procedure for AD8663ARZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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