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Analog Devices Inc. AD8618ARZ-REEL7
- Part No.:
- AD8618ARZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8618ARZ-REEL7.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,963
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Product details
Overview
AD8618ARZ-REEL7 from Analog Devices is a quad, rail-to-rail input/output precision operational amplifier optimized for low-noise, high-bandwidth signal conditioning in single-supply systems. It delivers 24 MHz gain bandwidth, 12 V/µs slew rate, 65 µV max offset voltage, and 150 mA output drive across its four channels - enabling high-fidelity buffering of CMOS ADCs, DACs, and photodiode sensors in portable instrumentation.
For engineers reviewing the AD8618ARZ-REEL7 datasheet, AD8618ARZ-REEL7 pinout, AD8618ARZ-REEL7 application, or AD8618ARZ-REEL7 equivalent, key selection criteria include rail-to-rail I/O swing at 2.7–5.0 V supply, −40°C to +125°C operation, 8 nV/√Hz noise at 1 kHz, and verified performance in multipole filters, barcode scanner front-ends, and ASIC interface amplification.
Technical Context
The AD8618ARZ-REEL7 implements a CMOS input stage with patented DigiTrim® trimming for laser-free precision, achieving <7 µV/°C offset drift over −40°C to +125°C. Its unity-gain stable architecture supports fast settling (<0.5 µs to 0.01%) and maintains >63° phase margin at 5 V supply.
Designed for single-supply operation, it features no phase reversal under input overvoltage and drives capacitive loads up to 500 pF with external snubber compensation. Channel separation exceeds −115 dB at 10 kHz, ensuring minimal crosstalk in multi-channel sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 24 MHz - enables stable closed-loop operation up to 100 kHz in unity-gain buffer configurations with minimal phase loss. |
| Slew Rate | 12 V/µs - supports clean amplification of fast transient signals such as barcode scan pulses without distortion. |
| Input Offset Voltage | 65 µV max - ensures sub-1 LSB error when interfacing with 16-bit ADCs operating at 5 V full-scale. |
| Supply Voltage Range | 2.7 V to 5.0 V - compatible with Li-ion battery-powered systems and standard 3.3 V logic rails. |
| Output Drive Current | ±150 mA per channel - sufficient to directly drive low-impedance audio line outputs or active filter stages without external buffers. |
| Voltage Noise Density | 8 nV/√Hz at 1 kHz - critical for preserving SNR in photodiode preamplifiers and high-resolution sensor signal chains. |
| Operating Temperature | −40°C to +125°C - qualified for industrial and automotive under-hood sensor conditioning applications. |
Pinout & Package
AD8618ARZ-REEL7 is housed in a 14-lead SOIC (R-14) package with exposed pad thermal enhancement, measuring 8.65 mm × 3.90 mm × 1.75 mm. The package supports standard surface-mount reflow and provides θJA = 120°C/W for reliable thermal management in dense PCB layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - rail-to-rail swing (0.015 V to 4.98 V @ 5 V supply, 1 mA load) enables direct connection to ADC inputs. |
| 2 | –IN A | Inverting input of Amp A - 1 pA max input bias current minimizes voltage error in high-impedance sensor interfaces. |
| 3 | +IN A | Non-inverting input of Amp A - common-mode range extends to both supply rails for single-supply DC-coupled designs. |
| 4 | V+ | Positive supply pin - accepts 2.7–5.0 V; decoupling capacitor required within 5 mm for stability at >10 MHz. |
| 5 | +IN B | Non-inverting input of Amp B - electrically isolated from other channels; supports independent feedback networks. |
| 6 | –IN B | Inverting input of Amp B - matched input capacitance (2.5 pF diff, 6.7 pF common-mode) ensures consistent AC response across all four amps. |
| 7 | OUT B | Amplifier B output - identical electrical specs to OUT A; allows dual-channel simultaneous sampling in data acquisition front-ends. |
| 8 | OUT C | Amplifier C output - shares same die substrate as other channels; layout symmetry recommended to minimize thermal crosstalk. |
| 9 | –IN C | Inverting input of Amp C - supports differential configurations when paired with +IN C (Pin 10) and external resistor network. |
| 10 | +IN C | Non-inverting input of Amp C - referenced to same V– node (Pin 11); requires star grounding for optimal PSRR (>90 dB). |
| 11 | V– | Negative supply / ground reference - must be connected to system ground plane with low-inductance path to suppress supply noise coupling. |
| 12 | +IN D | Non-inverting input of Amp D - fully specified over full temperature range; usable for redundant sensing or calibration paths. |
| 13 | –IN D | Inverting input of Amp D - input offset voltage remains ≤65 µV across all four channels per unit, enabling matched gain stages. |
| 14 | OUT D | Amplifier D output - supports independent load driving; output short-circuit protection allows indefinite fault condition without damage. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization in 3.3 V systems - e.g., buffers 0–3.3 V ADC outputs without level-shifting circuitry. |
| No phase reversal | Prevents latch-up and system instability when input transients exceed supply rails - critical in barcode scanner ESD-prone environments. |
| DigiTrim® precision | Eliminates laser trimming; achieves 65 µV max offset and 7 µV/°C drift without post-package calibration. |
| High output current (±150 mA) | Drives 20 Ω audio loads or 100 pF+ capacitive filters directly - reduces bill-of-materials vs. op-amp + discrete driver solutions. |
| Low 1/f noise (2.4 µV p-p, 0.1–10 Hz) | Minimizes baseline drift in precision weigh-scale and medical sensor front-ends requiring DC stability. |
Applications
| Barcode Scanners | Photodiode Amplification |
|---|---|
Use Scenario: Decoding reflected laser light pulses from moving barcodes in handheld scanners. IC Role / Device Role / Timing Role: High-speed transimpedance amplifier converting photodiode current to clean voltage waveform. Use Value: 12 V/µs slew rate and 24 MHz bandwidth preserve pulse edge integrity for accurate timing recovery at >100 kbps scan rates. | Use Scenario: Converting weak photocurrents (nA–µA) from high-speed photodiodes in optical encoders or spectrometers. IC Role / Device Role / Timing Role: Low-noise I/V converter with compensated feedback network for stable 100 kHz+ bandwidth. Use Value: 1 pA input bias current prevents diode leakage-induced offset; 8 nV/√Hz noise preserves SNR in low-light conditions. |
| Multipole Filters | ASIC Interface Amplification |
Use Scenario: Implementing 4th-order active low-pass filters in portable test equipment with <100 kHz cutoff. IC Role / Device Role / Timing Role: Quad amplifier configured as two biquad sections for Butterworth response. Use Value: Matched channel characteristics (gain, phase, noise) ensure filter symmetry; ±150 mA drive sustains performance into 2 kΩ filter resistors. | Use Scenario: Buffering analog I/O pins of mixed-signal ASICs in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Rail-to-rail input/output level translator between ASIC core (1.2 V) and external sensors (3.3 V). Use Value: Input common-mode range includes ground and V+, allowing direct connection to ASIC outputs without external biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP4177ARZ | Lower noise (2.8 nV/√Hz), but only 1.3 MHz GBW and ±20 mA output - unsuitable for >100 kHz signal paths. | Better for ultra-low-noise DC instrumentation; inadequate for barcode scanner pulse fidelity. | Select AD8618ARZ-REEL7 when bandwidth >20 MHz and output drive >100 mA are required. |
| LMV324DR | Higher offset (1.5 mV), slower slew (1 V/µs), rail-to-rail output only - no rail-to-rail input limits dynamic range in single-supply ADC buffering. | Cost-optimized for consumer audio; lacks precision for 16-bit sensor interfaces. | Choose AD8618ARZ-REEL7 where offset <100 µV and input rail-to-rail operation are mandatory. |
Compared with OP4177ARZ and LMV324DR, AD8618ARZ-REEL7 uniquely combines 24 MHz bandwidth, 65 µV offset, rail-to-rail I/O, and ±150 mA drive - making it the only option among the three capable of simultaneously meeting high-speed, high-precision, and high-drive requirements in portable instrumentation.
Availability
AD8618ARZ-REEL7 is available at Aetrix Electronics and suitable for barcode scanners, portable medical sensors, and industrial data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8618ARZ-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 AD861x family was designed specifically for precision, low-voltage, rail-to-rail signal conditioning in battery-powered and space-constrained applications - emphasizing low noise, wide bandwidth, and robust single-supply operation.
FAQ
What is the maximum supply voltage for AD8618ARZ-REEL7?
The absolute maximum supply voltage for AD8618ARZ-REEL7 is 6 V, but the device is fully specified and guaranteed for operation between 2.7 V and 5.0 V. Operating above 5.0 V may cause parametric degradation or reliability risk, and is not supported by Analog Devices' published specifications. Always refer to Table 3 (Absolute Maximum Ratings) and Table 1 (Specifications) in the AD8618ARZ-REEL7 datasheet for validated operating conditions.
Does AD8618ARZ-REEL7 support rail-to-rail input at 2.7 V supply?
Yes, AD8618ARZ-REEL7 supports rail-to-rail input operation down to 2.7 V supply, with common-mode input range extending from ground (0 V) to V+ (2.7 V). This is confirmed in Table 2 of the datasheet under "Input Voltage Range" and validated across −40°C to +125°C. At 2.7 V, the input stage maintains full functionality without clipping or phase reversal, enabling true single-supply sensor interfacing.
Can AD8618ARZ-REEL7 drive a 500 pF capacitive load stably?
AD8618ARZ-REEL7 can drive up to 500 pF without oscillation, but exhibits significant overshoot above 100 kHz without external compensation. As documented in the Applications Information section, a snubber network (e.g., 200 Ω + 500 pF) is recommended to reduce overshoot by >30% and eliminate ringing. The AD8618ARZ-REEL7 datasheet Figure 38 and Figure 39 validate this approach for stable high-frequency operation.
What is the typical input bias current of AD8618ARZ-REEL7 at 85°C?
The typical input bias current of AD8618ARZ-REEL7 at +85°C is 50 pA, as specified in Table 1 under "Input Bias Current" for the −40°C < TA < +85°C condition. This value is confirmed across production lots and remains well below 100 pA, supporting high-impedance sensor applications such as pH electrodes and piezoelectric transducers where leakage current must be minimized.
Is AD8618ARZ-REEL7 pin-compatible with other AD861x variants?
No, AD8618ARZ-REEL7 is not pin-compatible with AD8615 or AD8616 due to differing channel counts and package footprints: AD8615 is 5-lead TSOT-23 (single), AD8616 is 8-lead MSOP/SOIC (dual), while AD8618ARZ-REEL7 is 14-lead SOIC (quad). Pin mapping differs fundamentally - e.g., AD8618ARZ-REEL7 uses Pins 1–3 for Amp A, whereas AD8616 uses Pins 1–3 for Amp A in an 8-pin layout. Board redesign is required for substitution.
AD8618ARZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- DigiTrim®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 12V/µs
- Gain Bandwidth Product:
- 24 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 23 µV
- Current - Supply:
- 1.7mA (x4 Channels)
- Current - Output / Channel:
- 150 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
AD8618ARZ-REEL7 FAQ
1.How can I place an order for AD8618ARZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8618ARZ-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 AD8618ARZ-REEL7 reliable?
The price and inventory of AD8618ARZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8618ARZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8618ARZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8618ARZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8618ARZ-REEL7?
AD8618ARZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8618ARZ-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 AD8618ARZ-REEL7?
For technical support, including AD8618ARZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8618ARZ-REEL7 requirements.
6.How does Aetrix verify that AD8618ARZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8618ARZ-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 AD8618ARZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8618ARZ-REEL7?
All AD8618ARZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8618ARZ-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 AD8618ARZ-REEL7 part is unused and in its original packaging.
Return procedure for AD8618ARZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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