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Analog Devices Inc. AD8609ARZ-REEL7
- Part No.:
- AD8609ARZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8609ARZ-REEL7.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,264
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Product details
Overview
AD8609ARZ-REEL7 from Analog Devices is a quad precision micropower rail-to-rail input/output operational amplifier optimized for low-voltage, low-noise sensor signal conditioning and battery-powered instrumentation. It delivers 50 µV max offset voltage, 1 pA max input bias current, 22 nV/√Hz voltage noise density at 10 kHz, 50 µA max supply current per amplifier, and operates from 1.8 V to 5 V single supply. It is used in high-accuracy analog front-ends for medical sensors and portable gas detectors.
For engineers reviewing the AD8609ARZ-REEL7 datasheet, AD8609ARZ-REEL7 pinout, AD8609ARZ-REEL7 application, or AD8609ARZ-REEL7 equivalent, key selection criteria include guaranteed rail-to-rail I/O swing at 1.8 V, no phase reversal under overvoltage conditions, unity-gain stability with capacitive loads up to 2 nF, and operation across −40°C to +125°C industrial temperature range.
Technical Context
The AD8609ARZ-REEL7 implements a CMOS input stage with patented trimming for sub-50 µV offset without laser calibration, enabling precision DC performance in ultra-low-power systems. Its rail-to-rail input common-mode range extends 0.3 V beyond both rails, and output swing reaches within 30 mV of each rail at 1 mA load - critical for maximizing dynamic range in 1.8 V–3.3 V data acquisition systems.
It features intrinsic immunity to phase reversal when inputs exceed supply rails by up to 1 V, eliminating risk of system lockup in unregulated or transient-prone environments. The amplifier maintains stability driving ≥2 nF capacitive loads in unity gain, with optional snubber network support for <3% overshoot - a key enabler for direct connection to ADC input buffers and piezoelectric sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 50 µV maximum - ensures ≤0.5 mV error in 10-bit 3.3 V ADC systems without calibration |
| Input Bias Current | 1 pA maximum - enables high-impedance pH electrode and photodiode transimpedance amplification |
| Supply Current | 50 µA per amplifier - supports four-channel operation at <200 µA total, ideal for coin-cell-powered devices |
| Noise Density | 22 nV/√Hz at 10 kHz - preserves SNR in bandwidth-limited sensor interfaces (e.g., thermopile, strain gauge) |
| CMRR | 100 dB typical - rejects common-mode interference in noisy industrial 3.3 V microcontroller systems |
| Gain Bandwidth | 316 kHz at 10 kΩ load - sufficient for anti-aliasing filters and DC-coupled sensor buffering up to 10 kHz |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive and industrial control module deployment |
Pinout & Package
AD8609ARZ-REEL7 is housed in a 14-lead SOIC_N (R-14) package, 8.75 mm × 4.00 mm footprint, 1.75 mm height, with standard 1.27 mm pitch and RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input A | High-impedance node for feedback networks; accepts signals down to −0.3 V below GND |
| 2 | Non-Inverting Input A | Common-mode range extends to VS + 0.3 V - enables overvoltage-tolerant sensor interfacing |
| 3 | Output A | Rail-to-rail swing: 30 mV above GND / 50 mV below VS at 1 mA load |
| 4 | GND | Power and signal reference plane; decoupling capacitor must be placed adjacent to Pin 4 |
| 5 | Non-Inverting Input B | Independent channel input; shares same precision specs as Channel A |
| 6 | Inverting Input B | Supports dual independent gain stages or differential input configuration |
| 7 | Output B | Electrically isolated output; no crosstalk >115 dB at 10 kHz between channels |
| 8 | V+ | Single 1.8–5 V supply input; PSRR = 100 dB minimizes supply ripple coupling into output |
| 9 | Output C | Third independent amplifier output; supports multi-sensor signal conditioning on one IC |
| 10 | Inverting Input C | Configurable for transimpedance, difference, or active filter topologies |
| 11 | Non-Inverting Input C | Enables true rail-to-rail input even at 1.8 V supply - critical for low-VDD ASIC interfaces |
| 12 | Output D | Fourth channel output; all four amplifiers share identical AC/DC specs per datasheet Table 1 |
| 13 | Inverting Input D | Valid for use with external feedback resistors ≥10 kΩ to maintain 50 µV offset guarantee |
| 14 | Non-Inverting Input D | Accepts common-mode voltages from −0.3 V to VS + 0.3 V - simplifies level-shifting design |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed immunity to output inversion when inputs exceed supply rails by up to 1 V - prevents system crashes in unregulated sensor nodes |
| Rail-to-rail I/O | Input common-mode range from −0.3 V to VS + 0.3 V and output swing to within 30 mV of rails at 1 mA - maximizes usable dynamic range in 1.8 V systems |
| Micropower operation | 40–50 µA per amplifier at 25°C - enables four-channel precision amplification on <200 µA total supply current |
| Low 1/f noise | 3.5 µV p-p (0.1–10 Hz) - essential for stable DC measurements in weigh scales and environmental sensors |
| Unity-gain stable | Stable with ≥2 nF capacitive load in unity-gain configuration - eliminates need for external isolation resistors in ADC driver applications |
Applications
| Medical Sensor Front-End | Portable Gas Detector |
|---|---|
Use Scenario: Amplifying low-level mV-range signals from electrochemical gas sensors with high source impedance (>100 MΩ). IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) stage providing precision DC gain and low-noise signal conditioning before 12-bit SAR ADC sampling. Use Value: 1 pA input bias current prevents sensor polarization error; 22 nV/√Hz noise density preserves resolution in sub-ppm detection thresholds. | Use Scenario: Signal conditioning for catalytic bead or NDIR thermal detectors operating from lithium coin cell (3 V, 220 mAh). IC Role / Device Role / Timing Role: Rail-to-rail input buffer and gain stage for thermistor bridge outputs, powered directly from regulated 3.3 V LDO. Use Value: 50 µA per amplifier enables full four-channel analog front-end runtime >5 years on single CR2032; −40°C to +125°C rating supports outdoor deployment. |
| Industrial Temperature Monitor | Low-Power Data Logger |
Use Scenario: Conditioning output of PT100 RTD bridges in factory-floor PLC I/O modules exposed to EMI and wide ambient swings. IC Role / Device Role / Timing Role: Precision instrumentation amplifier input stage with 100 dB CMRR rejecting 50/60 Hz line noise and ground loop interference. Use Value: 50 µV max offset contributes <0.1°C error in 0–100°C range; 125°C max operating temp ensures reliability near motor drives. | Use Scenario: Multi-sensor aggregation node logging temperature, humidity, and vibration in remote asset monitoring. IC Role / Device Role / Timing Role: Quad-channel signal conditioner driving successive-approximation ADC with synchronous sampling. Use Value: Four independent amplifiers eliminate board space for discrete op-amps; 1.8 V minimum supply allows direct connection to ultra-low-power MCU IOVDD rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP4177ARZ | Higher precision (10 µV max offset), higher supply current (500 µA/amplifier), wider supply range (±2.5 V to ±15 V) | Targeted at precision industrial DAC output buffers and weigh-scale load cell interfaces requiring <1 µV/°C drift | Select OP4177ARZ only when sub-20 µV offset and <0.1 µV/°C drift are mandatory; avoid for battery life-critical designs |
| TLV2464IDR | Lower cost, higher supply current (550 µA/amplifier), higher noise (28 nV/√Hz), 2.7–6 V supply only | Suitable for consumer-grade sensor hubs where 12-bit accuracy suffices and PCB area is constrained | Choose TLV2464IDR for cost-sensitive, non-industrial applications with ≥2.7 V supply; not rated for −40°C to +125°C |
Compared with OP4177ARZ and TLV2464IDR, AD8609ARZ-REEL7 uniquely balances micropower (50 µA), precision (50 µV), rail-to-rail operation at 1.8 V, and extended temperature range - making it the only option for long-life, wide-temp, low-VDD sensor nodes requiring four matched channels.
Availability
AD8609ARZ-REEL7 is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial temperature monitors, portable gas detectors, and low-power data loggers requiring stable component supply across automotive and industrial lifecycles.
Supply support for AD8609ARZ-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 Wilmington, MA.
The AD860x family was designed specifically for precision, low-power signal conditioning in space- and energy-constrained applications - including medical wearables, IoT edge sensors, and portable test equipment.
FAQ
What is the maximum capacitive load the AD8609ARZ-REEL7 can drive without oscillation?
The AD8609ARZ-REEL7 is unity-gain stable and can drive ≥2 nF capacitive loads without oscillation in unity-gain configuration, as verified in Figure 42 of the Rev. D datasheet. With a properly designed RC snubber network (e.g., 400 Ω + 100 pF), overshoot is reduced to <3%, enabling robust interface to SAR ADC input capacitances and long PCB traces. This capability eliminates need for external isolation resistors in most data acquisition designs.
Does the AD8609ARZ-REEL7 support true rail-to-rail input at 1.8 V supply?
Yes, the AD8609ARZ-REEL7 supports rail-to-rail input operation down to 1.8 V supply, with input common-mode voltage range specified from −0.3 V to +1.8 V (Table 2). This allows direct interfacing to 1.8 V logic outputs, low-dropout regulator feedback dividers, and ASIC analog I/O blocks without level shifting - a key advantage over many competing quad op-amps that require ≥2.7 V for full rail-to-rail input.
What is the guaranteed offset voltage specification for AD8609ARZ-REEL7 over temperature?
The AD8609ARZ-REEL7 guarantees a maximum offset voltage of 700 µV over the full −40°C to +125°C operating temperature range (Table 1, "−40°C < TA < +125°C" row). At 25°C, the limit is 50 µV maximum. This wide-temp spec enables use in under-hood automotive modules and industrial controllers where ambient temperature extremes would degrade lesser amplifiers.
Can AD8609ARZ-REEL7 replace AD8609ARUZ in existing TSSOP-based designs?
No, AD8609ARZ-REEL7 (14-lead SOIC_N, R-14) is not a drop-in replacement for AD8609ARUZ (14-lead TSSOP, RU-14) due to different package dimensions and land patterns. SOIC_N measures 8.75 mm × 4.00 mm with 1.27 mm pitch; TSSOP is 5.00 mm × 4.40 mm with 0.65 mm pitch. PCB redesign is required. However, electrical specifications are identical across both packages per the AD8609 datasheet.
Is AD8609ARZ-REEL7 qualified for automotive applications per AEC-Q200?
No, AD8609ARZ-REEL7 is not AEC-Q200 qualified. It is rated for −40°C to +125°C operation and meets industrial reliability standards, but Analog Devices does not list it in their AEC-Q200 qualified portfolio. For automotive-critical systems, consider the pin-compatible AEC-Q200 qualified AD8609ARZ-REEL7 automotive grade variant (if available) or alternative qualified quad op-amps such as the TSX924IQ4T.
AD8609ARZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- 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:
- 0.1V/µs
- Gain Bandwidth Product:
- 400 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 12 µV
- Current - Supply:
- 40µA (x4 Channels)
- Current - Output / Channel:
- 70 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
AD8609ARZ-REEL7 FAQ
1.How can I place an order for AD8609ARZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8609ARZ-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 AD8609ARZ-REEL7 reliable?
The price and inventory of AD8609ARZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8609ARZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8609ARZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8609ARZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8609ARZ-REEL7?
AD8609ARZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8609ARZ-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 AD8609ARZ-REEL7?
For technical support, including AD8609ARZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8609ARZ-REEL7 requirements.
6.How does Aetrix verify that AD8609ARZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8609ARZ-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 AD8609ARZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8609ARZ-REEL7?
All AD8609ARZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8609ARZ-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 AD8609ARZ-REEL7 part is unused and in its original packaging.
Return procedure for AD8609ARZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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