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Analog Devices Inc. AD8659ARZ
- Part No.:
- AD8659ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8659ARZ.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:209
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Product details
Overview
AD8659ARZ from Analog Devices is a quad, rail-to-rail input/output, micropower precision operational amplifier optimized for low-power, wide-supply-voltage applications. It delivers 22 μA maximum quiescent current per amplifier at 18 V, 350 μV maximum offset voltage, and 20 pA maximum input bias current, enabling high-accuracy current monitoring in 4 mA to 20 mA loop drivers and remote sensor front ends.
For engineers reviewing the AD8659ARZ datasheet, AD8659ARZ pinout, AD8659ARZ application, or AD8659ARZ equivalent, this page provides verified specifications, SOIC-14 package layout, real-world use cases in process control and wireless sensing, and validated alternative parts with documented functional and application-level differences.
Technical Context
The AD8659ARZ employs Analog Devices' patented DigiTrim® trimming technique to achieve low offset voltage and stable performance across −40°C to +125°C. Its rail-to-rail input and output stages support operation from 2.7 V to 18 V single supply (±1.35 V to ±9 V dual), with unity-gain stability and 230 kHz gain bandwidth product at AV = 100.
It features high electromagnetic interference (EMI) immunity (90 dB EMI rejection ratio at 400–2400 MHz), 10 GΩ input resistance, and low noise (50 nV/√Hz at 1 kHz), making it suitable for high-impedance sensor buffering and precision dc gain stages where supply current and offset drift must be tightly controlled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amp | 22 μA max at 18 V - enables multi-channel battery-powered systems with >10-year runtime on coin cells. |
| Input Offset Voltage | 350 μV max at 25°C - ensures ≤0.002% error in 4–20 mA transmitter output calibration. |
| Input Bias Current | 20 pA max - preserves signal integrity when amplifying outputs from high-impedance pH or ion-selective electrodes. |
| Gain Bandwidth Product | 230 kHz at AV = 100 - supports stable closed-loop gain up to 100 without compensation in sensor signal chains. |
| Rail-to-Rail I/O | Input: 0 V to VS; Output: within 30 mV of rails at 100 kΩ load - maximizes dynamic range in single-supply 3.3 V or 12 V systems. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, industrial motor control, and outdoor wireless sensor nodes. |
| EMI Rejection Ratio | 90 dB at 400–2400 MHz - suppresses cellular/WiFi-induced errors in unshielded IoT sensor enclosures. |
Pinout & Package
AD8659ARZ is supplied in a 14-lead SOIC_N (R-14) package with standard JEDEC footprint. The exposed pad variant is not used in this part number; only the SOIC version is designated by the "ARZ" suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives feedback network or next-stage load; rail-to-rail swing supports full-scale ADC interfacing. |
| 2 | −IN A | Inverting input of Amp A - connects to feedback resistor in transimpedance or inverting configurations. |
| 3 | +IN A | Non-inverting input of Amp A - accepts high-impedance sensor signals with minimal loading due to 10 GΩ input resistance. |
| 4 | V+ | Positive supply rail - accepts 2.7 V to 18 V; decoupling capacitor required within 1 cm for stability. |
| 5 | +IN B | Non-inverting input of Amp B - electrically isolated from other channels; enables independent sensor conditioning paths. |
| 6 | −IN B | Inverting input of Amp B - supports differential input configuration when paired with +IN B and external resistors. |
| 7 | OUT B | Amplifier B output - shares same electrical specs as OUT A; no crosstalk (95 dB channel separation at 10 kHz). |
| 8 | OUT C | Amplifier C output - identical performance to OUT A/B; allows 3-channel simultaneous signal conditioning in compact layout. |
| 9 | −IN C | Inverting input of Amp C - referenced to local ground or virtual ground; immune to common-mode noise on shared V−. |
| 10 | +IN C | Non-inverting input of Amp C - supports direct connection to thermocouple or RTD bridges without buffer stage. |
| 11 | V− | Negative supply rail - connects to system ground in single-supply mode; must be low-impedance for PSRR >90 dB. |
| 12 | +IN D | Non-inverting input of Amp D - enables fourth independent analog path; supports multipole filter or level-shifting functions. |
| 13 | −IN D | Inverting input of Amp D - configurable as comparator input when open-loop; internal protection diodes limit input to V− −0.3 V / V+ +0.3 V. |
| 14 | OUT D | Amplifier D output - completes quad functionality; all four outputs fully specified for drive capability (±12 mA short-circuit). |
Key Features
| Feature | Design Value |
|---|---|
| Micropower at high voltage | 22 μA max per amp at 18 V - reduces thermal drift and enables energy harvesting designs with <100 μW total quiescent power. |
| DigiTrim® offset calibration | 350 μV max VOS at 25°C, 2 μV/°C drift - eliminates manual trim pots and improves long-term calibration stability in field-deployed equipment. |
| Rail-to-rail input and output | Full 0 V to 18 V input range; output swings to within 30 mV of rails - maximizes usable ADC input range in single-supply data acquisition systems. |
| High EMI immunity | 90 dB rejection at 900 MHz and 2.4 GHz - prevents RF rectification artifacts in medical wearables and industrial gateways near wireless transceivers. |
| Wide supply range | 2.7 V to 18 V single supply (±1.35 V to ±9 V dual) - supports legacy 12 V industrial rails and modern 3.3 V microcontroller interfaces without level shifters. |
Applications
| 4 mA to 20 mA Loop Driver | Remote Wireless Sensor Front End |
|---|---|
Use Scenario: Precision current source for industrial process transmitters sending analog signals over 1 km twisted-pair cables. IC Role / Device Role / Timing Role: Quad op-amp configures as voltage-controlled current source (V/I converter), reference buffer, feedback amplifier, and diagnostic monitor. Use Value: 350 μV offset ensures ≤0.002% full-scale error; 22 μA quiescent current allows loop-powered operation with headroom for sensor excitation. | Use Scenario: Battery-operated soil moisture and temperature node transmitting via LoRaWAN every 15 minutes. IC Role / Device Role / Timing Role: Buffers capacitive soil sensor, amplifies thermistor voltage, conditions ADC reference, and drives low-power ADC input. Use Value: 20 pA input bias avoids leakage-induced drift in high-Z RC networks; rail-to-rail output matches 3.3 V SAR ADC input range. |
| Current Monitor in Motor Control | Multipole Active Filter |
Use Scenario: Shunt-based phase current sensing in BLDC inverter with real-time overcurrent protection. IC Role / Device Role / Timing Role: High-side current sense amplifier with gain-setting resistors and fast-settling output stage. Use Value: 15 µs settling to 0.1% enables accurate sampling during PWM dead time; 10 GΩ input resistance prevents shunt loading errors. | Use Scenario: 4th-order low-pass anti-aliasing filter preceding sigma-delta ADC in vibration monitoring system. IC Role / Device Role / Timing Role: Implements two 2nd-order Sallen-Key stages using all four amplifiers in one AD8659ARZ package. Use Value: Unity-gain stability and 230 kHz GBP allow precise cutoff at 10 kHz without external compensation; quad integration saves PCB area vs. discrete op-amps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision micropower op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8609ARUZ | Quad, 50 μA ISY, 650 μV VOS max, 1.5 MHz GBP, SOIC-14 package | Higher speed and power; less suitable for ultra-low-power battery systems but better for higher-bandwidth filtering | Select AD8609ARUZ when >100 kHz closed-loop bandwidth is required and supply current budget allows ≥2× increase. |
| ADA4091-4ARUZ | Quad, 35 μA ISY, 500 μV VOS max, 1.2 MHz GBP, rail-to-rail I/O, SOIC-14 | Lower offset drift (1.5 μV/°C), higher PSRR (120 dB), but 1.6× higher supply current than AD8659ARZ | Choose ADA4091-4ARUZ for high-precision industrial DAQ requiring tighter thermal drift specs and enhanced supply noise rejection. |
Compared with AD8659ARZ, AD8609ARUZ trades 2.3× higher supply current for 6.5× higher bandwidth, while ADA4091-4ARUZ offers superior PSRR and drift control at 1.6× the quiescent current-making AD8659ARZ optimal for longest battery life in low-bandwidth sensor signal chains.
Availability
AD8659ARZ is available at Aetrix Electronics and suitable for 4 mA to 20 mA loop drivers, remote wireless sensors, current monitors in motor control, and multipole active filters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8659ARZ 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 AD865x family-including AD8659ARZ-is designed specifically for precision, micropower signal conditioning in battery-constrained and wide-supply industrial applications, emphasizing rail-to-rail operation, low drift, and EMI robustness.
FAQ
What is the maximum supply voltage rating for AD8659ARZ?
The AD8659ARZ has an absolute maximum supply voltage rating of 20.5 V. Continuous operation is specified from 2.7 V to 18 V single supply (±1.35 V to ±9 V dual). Exceeding 18 V in normal operation risks violating the recommended operating conditions and may accelerate parametric drift over temperature and time. Always observe the 300 mV input voltage clamp limits relative to V+ and V− rails.
Does AD8659ARZ support true rail-to-rail input and output operation?
Yes, AD8659ARZ supports true rail-to-rail input (common-mode range extends from V− to V+) and rail-to-rail output (swing within 30 mV of V− and within 30 mV of V+ at 100 kΩ load, −40°C to +125°C). This enables full utilization of supply rails in single-supply systems such as 3.3 V or 12 V sensor interfaces, maximizing dynamic range without level-shifting circuitry.
What is the typical input bias current of AD8659ARZ at room temperature?
The typical input bias current of AD8659ARZ is 1 pA at 25°C (with maximum of 20 pA). This ultra-low value is achieved using CMOS input stages and makes the device ideal for interfacing with high-impedance sources like piezoelectric sensors, photodiodes, and electrochemical electrodes where leakage currents would otherwise dominate signal accuracy.
Can AD8659ARZ be used in a comparator configuration?
Yes, AD8659ARZ can be used open-loop as a comparator, though it is not optimized for speed in that role. Its 230 kHz unity-gain bandwidth and 80 V/ms slew rate limit response to ~10 µs for large steps. For reliable comparator operation, hysteresis must be added externally, and inputs must remain within the absolute maximum ratings (V− −0.3 V to V+ +0.3 V) due to internal ESD diodes.
Is AD8659ARZ pin-compatible with other quad op-amps in SOIC-14 packages?
No, AD8659ARZ is not pin-compatible with generic quad op-amps (e.g., LM324, TL084) due to its unique pin mapping: V+ is on Pin 4 and V− on Pin 11, whereas most legacy parts place supplies on Pins 4 and 11 reversed. Substituting without board revision will cause immediate failure. Always verify pin function against Table 8 in the AD8659 datasheet Rev. C before replacement.
AD8659ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.08V/µs
- Gain Bandwidth Product:
- 200 kHz
- -3db Bandwidth:
- 305 kHz
- Current - Input Bias:
- 5 pA
- Voltage - Input Offset:
- 350 µV
- Current - Supply:
- 18µA (x4 Channels)
- Current - Output / Channel:
- 12 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 18 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
AD8659ARZ FAQ
1.How can I place an order for AD8659ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8659ARZ 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 AD8659ARZ reliable?
The price and inventory of AD8659ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8659ARZ is usually 5 days.
3.What payment methods are accepted for AD8659ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8659ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8659ARZ?
AD8659ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8659ARZ 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 AD8659ARZ?
For technical support, including AD8659ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8659ARZ requirements.
6.How does Aetrix verify that AD8659ARZ is sourced from the original manufacturer or authorized distributors?
All AD8659ARZ 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 AD8659ARZ meets industry standards.
7.What is the process for return or replacement of AD8659ARZ?
All AD8659ARZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8659ARZ, 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 AD8659ARZ part is unused and in its original packaging.
Return procedure for AD8659ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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