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Analog Devices Inc. AD8655ARZ-REEL
- Part No.:
- AD8655ARZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8655ARZ-REEL.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,975
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Product details
Overview
AD8655ARZ-REEL from Analog Devices is a single-channel, low-noise precision CMOS operational amplifier optimized for high-resolution signal conditioning in rail-to-rail input/output systems. It delivers 2.7 nV/√Hz input voltage noise at 10 kHz, 250 µV max offset voltage over common-mode range, and 28 MHz gain bandwidth - enabling high-fidelity ADC buffering, precision filtering, and automotive collision avoidance sensor interfaces.
For engineers reviewing the AD8655ARZ-REEL datasheet, AD8655ARZ-REEL pinout, AD8655ARZ-REEL application, or AD8655ARZ-REEL equivalent, key selection criteria include its −40°C to +125°C automotive-grade temperature rating, 2.7 V to 5.5 V single-supply operation, sub-pA input bias current, and guaranteed rail-to-rail swing with <30 mV output low voltage under 1 mA load.
Technical Context
The AD8655ARZ-REEL employs Analog Devices' DigiTrim® post-package trimming to achieve high DC accuracy without sacrificing CMOS input advantages. Its voltage-feedback architecture features true rail-to-rail input stage (0 V to VS) and output swing (within 30 mV of rails), supporting unity-gain stability and low THD+N (0.0007%) at 1 kHz.
Designed for low-voltage, high-dynamic-range applications, it maintains 110 dB open-loop gain (typ) and 69° phase margin with 11 V/µs slew rate. The amplifier exhibits no phase reversal across full supply range and supports stable operation with capacitive loads up to 500 pF when properly compensated.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise Density | 2.7 nV/√Hz at 10 kHz - enables high-SNR signal chains in microphone preamps and sensor front-ends. |
| Offset Voltage (max) | 250 µV over VCM - ensures ≤0.01% gain error in 24-bit data acquisition systems at room temperature. |
| Gain Bandwidth Product | 28 MHz - supports stable closed-loop operation up to 10× gain with >2.8 MHz small-signal bandwidth. |
| Supply Voltage Range | 2.7 V to 5.5 V - compatible with Li-ion, 3.3 V, and 5 V logic domains without level-shifting. |
| Output Swing (low) | ≤30 mV above V− at 1 mA load - preserves headroom in single-supply 12-bit+ ADC driver stages. |
| Input Bias Current | 10 pA typ - permits use of high-impedance sensor interfaces (e.g., piezoelectric, pH electrodes) without significant error. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial control environments. |
Pinout & Package
AD8655ARZ-REEL is housed in an 8-lead SOIC_N (R-8) package, 4.90 mm × 3.91 mm × 1.75 mm, RoHS-compliant and Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect (NC) | Internally unconnected; must be left floating or tied to ground per layout best practices. |
| 2 | Inverting Input (−IN) | Differential input node; accepts signals from 0 V to VS with 85–100 dB CMRR. |
| 3 | Non-Inverting Input (+IN) | Differential input node; supports rail-to-rail common-mode range and sub-pA leakage. |
| 4 | Negative Supply (V−) | Ground or negative rail connection; referenced for all internal biasing and output swing limits. |
| 5 | No Connect (NC) | Internally unconnected; no external connection required. |
| 6 | Output (OUT) | Amplified signal output; drives ≥±220 mA into resistive loads and remains stable with ≤500 pF capacitance. |
| 7 | Positive Supply (V+) | Primary power rail; supplies current for quiescent operation (4.5 mA typ) and output drive. |
| 8 | No Connect (NC) | Internally unconnected; leave unconnected per datasheet Figure 1. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization in single-supply systems (e.g., 3.3 V ADC drivers), minimizing headroom loss. |
| DigiTrim® post-package offset calibration | Reduces mechanical stress-induced offset drift to 0.4 µV/°C typ, improving long-term measurement stability. |
| Low THD+N (0.0007%) | Maintains audio fidelity in mixing consoles and preserves SNR in precision DAC output buffers. |
| Unity-gain stable | Eliminates need for external compensation in buffer configurations, simplifying PCB layout and BOM. |
| Automotive qualification (AEC-Q100) | Validated for mission-critical vehicle subsystems including ADAS sensors and engine control feedback loops. |
Applications
| ADC Buffering | Precision Filter Stage |
|---|---|
Use Scenario: Driving SAR or sigma-delta ADC inputs in portable instrumentation with 24-bit resolution. IC Role / Device Role / Timing Role: Low-noise, low-offset voltage follower that maintains linearity and minimizes code spread. Use Value: 2.7 nV/√Hz noise and 250 µV offset ensure ≤1 LSB error in 24-bit conversion at 5 V full-scale. |
Use Scenario: Implementing 2nd-order active low-pass filters in vibration monitoring systems. IC Role / Device Role / Timing Role: High-GBW, low-distortion op-amp configured as Sallen-Key topology with precise pole placement. Use Value: 28 MHz GBP and 0.0007% THD+N enable clean cutoff at 100 kHz without harmonic contamination. |
| Automotive Collision Avoidance | Industrial Process Control |
Use Scenario: Signal conditioning for ultrasonic parking assist transducer receivers. IC Role / Device Role / Timing Role: Low-noise preamplifier amplifying µV-level echo returns while rejecting EMI in noisy vehicle environments. Use Value: 100 dB PSRR and −40°C to +125°C rating ensure reliable operation near engine compartments. |
Use Scenario: Isolating and scaling 4–20 mA loop signals in PLC analog input modules. IC Role / Device Role / Timing Role: Precision I/V converter and gain stage with rail-to-rail output for DAC-driven control outputs. Use Value: Sub-pA input bias prevents loading of high-impedance current-sense resistors, preserving loop accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA377AIDBVR | Higher input bias current (100 pA typ), lower GBW (10 MHz), no automotive qualification. | Better suited for cost-sensitive consumer-grade instrumentation where extended temp range is not required. | Select when budget constraints outweigh need for ultra-low noise and AEC-Q100 compliance. |
| ADA4625-1ARZ | Lower noise (2.9 nV/√Hz), higher slew rate (34 V/µs), but wider supply range (4.5–36 V) and larger SOIC-8 footprint. | Preferred for high-speed precision applications like photodiode TIA where fast transient response is critical. | Choose when driving capacitive loads >500 pF or requiring faster settling than AD8655ARZ-REEL's 370 ns. |
Compared with OPA377AIDBVR and ADA4625-1ARZ, the AD8655ARZ-REEL uniquely balances ultra-low noise, automotive qualification, and rail-to-rail operation in a standard SOIC-8 footprint - making it optimal for space-constrained, safety-relevant signal chains where DC precision and AC fidelity are both essential.
Availability
AD8655ARZ-REEL is available at Aetrix Electronics and suitable for automotive ADAS subsystems, industrial process controllers, and high-resolution data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8655ARZ-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.
The AD8655ARZ-REEL belongs to Analog Devices' precision amplifier product line, engineered specifically for low-noise, low-drift signal conditioning in demanding automotive, industrial, and medical applications.
FAQ
What is the maximum capacitive load the AD8655ARZ-REEL can drive without instability?
The AD8655ARZ-REEL can drive up to 500 pF without oscillation, though ringing may occur above 100 kHz. For stable operation with heavy capacitive loads, Analog Devices recommends adding a snubber network (e.g., 200 Ω + 500 pF) as shown in Figure 55 of the AD8655/AD8656 Rev. E datasheet. This preserves output swing while eliminating overshoot and ensuring robustness in ADC input buffer or cable-driving applications using the AD8655ARZ-REEL.
Does the AD8655ARZ-REEL support true rail-to-rail input common-mode voltage?
Yes, the AD8655ARZ-REEL features a true rail-to-rail input stage that accepts common-mode voltages from V− to V+, including both supply rails. This capability is confirmed in the General Description and Pin Configurations sections of the datasheet, and enables direct interfacing with sensors or DACs operating at the extremes of the supply range - a key advantage of the AD8655ARZ-REEL in single-supply systems.
Is the AD8655ARZ-REEL qualified for automotive applications?
Yes, the AD8655ARZ-REEL is explicitly qualified for automotive use per AEC-Q100 Grade 1 (−40°C to +125°C) and listed in the "Automotive Products" section of the Ordering Guide. Its SOIC_N package (R-8) and performance specifications - including guaranteed offset drift, PSRR, and output drive over temperature - meet stringent automotive reliability requirements, making the AD8655ARZ-REEL suitable for ADAS, body control, and powertrain subsystems.
What is the typical supply current of the AD8655ARZ-REEL at 25°C?
The AD8655ARZ-REEL draws 3.7 mA to 4.5 mA typical supply current per amplifier at 25°C with VS = 5.0 V and VOUT = 0 V, as specified in Table 1 of the Rev. E datasheet. At −40°C to +125°C, the maximum supply current is 5.3 mA. This low quiescent current supports energy-efficient designs in battery-powered instrumentation and always-on automotive modules using the AD8655ARZ-REEL.
How does the DigiTrim® technology in the AD8655ARZ-REEL improve performance?
DigiTrim® is Analog Devices' proprietary post-package laser trimming process that corrects offset voltage after packaging, eliminating errors induced by mechanical stress during assembly. For the AD8655ARZ-REEL, this achieves 250 µV max offset over VCM and 0.4 µV/°C typical drift - significantly better than standard CMOS op-amps. This directly enhances measurement accuracy and long-term stability in precision applications relying on the AD8655ARZ-REEL.
AD8655ARZ-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:
- 11V/µs
- Gain Bandwidth Product:
- 28 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 50 µV
- Current - Supply:
- 3.7mA
- Current - Output / Channel:
- 220 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
AD8655ARZ-REEL FAQ
1.How can I place an order for AD8655ARZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8655ARZ-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 AD8655ARZ-REEL reliable?
The price and inventory of AD8655ARZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8655ARZ-REEL is usually 5 days.
3.What payment methods are accepted for AD8655ARZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8655ARZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8655ARZ-REEL?
AD8655ARZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8655ARZ-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 AD8655ARZ-REEL?
For technical support, including AD8655ARZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8655ARZ-REEL requirements.
6.How does Aetrix verify that AD8655ARZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD8655ARZ-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 AD8655ARZ-REEL meets industry standards.
7.What is the process for return or replacement of AD8655ARZ-REEL?
All AD8655ARZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8655ARZ-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 AD8655ARZ-REEL part is unused and in its original packaging.
Return procedure for AD8655ARZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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