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Analog Devices Inc. ADA4665-2ARZ
- Part No.:
- ADA4665-2ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADA4665-2ARZ.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:264
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Product details
Overview
ADA4665-2ARZ from Analog Devices is a dual, rail-to-rail input/output CMOS operational amplifier optimized for low-power, high-voltage precision applications. It delivers 1.2 MHz gain bandwidth, 1 V/μs slew rate, and 290 μA per amplifier supply current at 16 V, enabling use in portable instrumentation, sensor front ends, and transimpedance amplifiers requiring wide dynamic range and single-supply operation from 5 V to 16 V.
For engineers reviewing the ADA4665-2ARZ datasheet, ADA4665-2ARZ pinout, ADA4665-2ARZ application, or ADA4665-2ARZ equivalent, key selection criteria include its 1 pA max input bias current, 3 μV/°C offset drift, rail-to-rail swing across −40°C to +125°C, and SOIC_N package compatibility with space-constrained industrial and medical signal conditioning designs.
Technical Context
The ADA4665-2ARZ employs a dual differential-pair input stage (nMOS + pMOS) to achieve true rail-to-rail common-mode input range (0 V to 16 V), with transition-induced offset shift occurring ~1 V below VSY. Its unity-gain stable architecture supports active filter topologies like Sallen-Key low-pass/high-pass configurations up to 10 kHz with 1% component tolerance.
It operates over ±2.5 V to ±8 V dual supplies or 5 V to 16 V single supply, delivering 15.9 VOH and 4 mVVOL (RL = 100 kΩ) at 16 V, while maintaining 75 dB CMRR and 95 dB PSRR - critical for precision current shunt sensing and multipole filtering where supply noise rejection and output headroom directly impact measurement fidelity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5 V to 16 V single supply; enables direct interfacing with 12 V industrial rails and battery-powered systems without level-shifting. |
| Gain Bandwidth Product | 1.2 MHz typical; supports stable closed-loop gain ≥10 at 100 kHz, suitable for anti-aliasing and sensor signal conditioning filters. |
| Input Bias Current | 1 pA maximum; minimizes voltage error in high-impedance sensor interfaces (e.g., pH electrodes, photodiode transimpedance amps). |
| Offset Voltage Drift | 3 μV/°C typical; ensures ≤0.36 mV total drift over −40°C to +125°C, critical for uncalibrated medical physiological measurements. |
| Slew Rate | 1 V/μs typical; allows full-scale 15 V output step in <16 μs, sufficient for 10 kHz sine wave reproduction with <0.1% distortion. |
| Output Swing | Rail-to-rail: VOH = 15.95 V, VOL = 4 mV (RL = 100 kΩ, VSY = 16 V); maximizes dynamic range in single-supply data acquisition front ends. |
| Operating Temperature | −40°C to +125°C; qualified for under-hood automotive sensors and industrial process control environments without derating. |
Pinout & Package
ADA4665-2ARZ is packaged in an 8-lead SOIC_N (R-8) with standard JEDEC MS-012-AA footprint (5.00 mm × 3.99 mm, 1.27 mm pitch). Thermal resistance θJA = 158°C/W enables operation at full rating without forced airflow in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT A | Amplifier A output | Delivers rail-to-rail voltage swing; drives 10 kΩ loads with <150 mV drop at 16 V supply. |
| 2: –IN A | Inverting input A | High-impedance node (4 GΩ); accepts signals from 0 V to 16 V common-mode range. |
| 3: +IN A | Non-inverting input A | Matches –IN A characteristics; enables precision differential or single-ended buffering. |
| 4: V– | Negative supply / ground | Reference for dual-supply (±2.5 V to ±8 V) or return path in single-supply (5–16 V) configurations. |
| 5: +IN B | Non-inverting input B | Independent of Channel A; supports dual-channel signal processing without crosstalk degradation. |
| 6: –IN B | Inverting input B | Same 1 pA bias current and 7 pF common-mode capacitance as Channel A for matched performance. |
| 7: OUT B | Amplifier B output | Electrically identical to OUT A; enables dual-path signal conditioning on one die. |
| 8: V+ | Positive supply | Accepts 5–16 V; internal regulation maintains stable bias current and GBW across full range. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input/output swing | Enables full 0–16 V signal capture and delivery in single-supply systems, eliminating level-shifting ICs in portable medical devices. |
| 1 pA maximum input bias current | Reduces leakage-induced offset in >100 MΩ sensor interfaces (e.g., piezoelectric accelerometers), preserving signal integrity. |
| 3 μV/°C offset voltage drift | Minimizes calibration frequency in field-deployed instrumentation, extending recalibration intervals beyond 12 months. |
| 1.2 MHz bandwidth at unity gain | Supports stable 2-pole active filters (e.g., 10 kHz Sallen-Key) with Butterworth response and <0.1 dB passband ripple. |
| −40°C to +125°C operating range | Qualifies for industrial motor control feedback loops and automotive cabin temperature sensors without thermal derating. |
Applications
| Portable Instrumentation | Current Shunt Sensing |
|---|---|
|
Use Scenario: Battery-powered handheld multimeters and ECG monitors requiring ultra-low power and high DC accuracy. IC Role / Device Role / Timing Role: Dual-channel buffer and signal conditioner for analog front-end multiplexing and ADC driving. Use Value: 290 μA per amplifier supply current extends battery life >200 hours; rail-to-rail swing preserves full sensor dynamic range. |
Use Scenario: High-side and low-side current monitoring in 12 V automotive subsystems and industrial PLC I/O modules. IC Role / Device Role / Timing Role: Precision difference amplifier in shunt-based current measurement circuits (e.g., Figure 55–56). Use Value: 1 pA input bias current prevents error in 0.1 Ω shunt resistor measurements; 15.9 VOH enables 1.59 A full-scale sensing at 16 V. |
| Physiological Measurement | Transimpedance Amplification |
|
Use Scenario: Low-noise amplification of microvolt-level bio-signals (e.g., EEG, EMG) in clinical diagnostic equipment. IC Role / Device Role / Timing Role: First-stage amplifier with DC-coupled input and high common-mode rejection. Use Value: 3 μV/°C drift ensures <10 μV total offset shift over body temperature range; 75 dB CMRR rejects 50/60 Hz interference. |
Use Scenario: Converting photodiode current to voltage in optical smoke detectors and pulse oximeters. IC Role / Device Role / Timing Role: Transimpedance amplifier with low input capacitance (2 pF diff, 7 pF common-mode) for stability. Use Value: 1 pA bias current avoids signal loss in high-impedance photodiode nodes; 1.2 MHz GBW supports >100 kHz optical modulation bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8667ARZ | Higher supply current (525 μA vs. 290 μA typ), wider GBW (16 MHz), but only specified to +105°C. | Better for high-speed active filters; unsuitable for extended-temperature industrial deployments. | Select AD8667ARZ when bandwidth >10 MHz is required and temperature range ≤+105°C. |
| ADA4091-2ARZ | Lower input bias current (0.5 pA max), lower noise (12 nV/√Hz), but narrower supply range (3–30 V) and no 16 V optimization. | Preferred for ultra-high-impedance pH sensors; less optimal for 12–16 V rail-limited systems. | Choose ADA4091-2ARZ for sub-pA bias-critical applications where 16 V operation is not mandatory. |
Compared with AD8667ARZ and ADA4091-2ARZ, the ADA4665-2ARZ uniquely balances ultra-low bias current, 16 V rail compatibility, and −40°C to +125°C qualification - making it the optimal choice for cost-sensitive, thermally demanding current sensing and portable instrumentation where power efficiency and DC precision are co-prioritized.
Availability
ADA4665-2ARZ is available at Aetrix Electronics and suitable for portable instrumentation, current shunt sensing, and physiological measurement systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADA4665-2ARZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADA4665-2ARZ belongs to Analog Devices' precision rail-to-rail op amp product line, engineered specifically for low-power, high-voltage signal conditioning in battery-constrained and thermally harsh environments.
FAQ
What is the maximum supply voltage for ADA4665-2ARZ?
The ADA4665-2ARZ has an absolute maximum supply voltage of 16.5 V, with recommended operation up to 16 V. Electrical specifications are fully characterized at 16 V, delivering 1.2 MHz bandwidth and 1 V/μs slew rate. Exceeding 16.5 V risks permanent damage per Absolute Maximum Ratings Table 5.
Does ADA4665-2ARZ support true rail-to-rail input at 5 V supply?
Yes, ADA4665-2ARZ supports rail-to-rail input common-mode range from 0 V to 5 V at 5 V supply, as confirmed in Table 4 (5 V Operation). Input voltage range remains 0 V to VSY across the full −40°C to +125°C temperature range, enabling full-scale signal capture in low-voltage portable systems.
What is the thermal resistance (θJA) of ADA4665-2ARZ in SOIC_N package?
The ADA4665-2ARZ in 8-lead SOIC_N (R-8) package has θJA = 158°C/W, measured on a 4-layer JEDEC standard PCB. This value enables continuous operation at 600 μA per amplifier (max over temperature) with <30°C junction rise above ambient at 25°C, supporting reliable deployment in enclosed industrial enclosures.
Can ADA4665-2ARZ drive 10 kΩ loads while maintaining rail-to-rail output?
Yes, ADA4665-2ARZ delivers VOH = 15.9 V and VOL = 40 mV (typical) into 10 kΩ loads at 16 V supply, per Table 3. Output swing degrades by <100 mV versus 100 kΩ loading, remaining within 100 mV of rails - sufficient for 12-bit ADC interfacing without external buffers.
Is ADA4665-2ARZ pin-compatible with other dual SOIC op amps like AD8607?
No, ADA4665-2ARZ is not pin-compatible with AD8607. While both are 8-lead SOIC dual op amps, ADA4665-2ARZ uses standard dual-amplifier pinout (OUT A, –IN A, +IN A, V–, +IN B, –IN B, OUT B, V+), whereas AD8607 uses different pin assignments (e.g., V+ at Pin 8, V– at Pin 4, but channel ordering differs). PCB layout must follow ADA4665-2ARZ Figure 1.
ADA4665-2ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- 1.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.1 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 290µA (x2 Channels)
- Current - Output / Channel:
- 30 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
ADA4665-2ARZ FAQ
1.How can I place an order for ADA4665-2ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4665-2ARZ 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 ADA4665-2ARZ reliable?
The price and inventory of ADA4665-2ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4665-2ARZ is usually 5 days.
3.What payment methods are accepted for ADA4665-2ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4665-2ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4665-2ARZ?
ADA4665-2ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4665-2ARZ 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 ADA4665-2ARZ?
For technical support, including ADA4665-2ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4665-2ARZ requirements.
6.How does Aetrix verify that ADA4665-2ARZ is sourced from the original manufacturer or authorized distributors?
All ADA4665-2ARZ 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 ADA4665-2ARZ meets industry standards.
7.What is the process for return or replacement of ADA4665-2ARZ?
All ADA4665-2ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADA4665-2ARZ, 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 ADA4665-2ARZ part is unused and in its original packaging.
Return procedure for ADA4665-2ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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