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Analog Devices Inc. ADA4062-2ARZ
- Part No.:
- ADA4062-2ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADA4062-2ARZ.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,932
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Product details
Overview
ADA4062-2ARZ from Analog Devices is a dual JFET-input operational amplifier optimized for low-power, precision signal conditioning in industrial and instrumentation systems. It delivers 50 pA maximum input bias current, 1.5 mV maximum offset voltage (B grade), 3.3 V/μs slew rate, and operates from ±5 V to ±15 V supplies. It is used in high-impedance sensor buffering and micropower instrumentation amplifiers.
For engineers reviewing the ADA4062-2ARZ datasheet, ADA4062-2ARZ pinout, ADA4062-2ARZ application, or ADA4062-2ARZ equivalent, key selection criteria include ultralow input bias current for high-Z source interfacing, rail-to-rail output swing capability, extended −40°C to +125°C temperature operation, and SOIC_N package compatibility with legacy PCB layouts.
Technical Context
The ADA4062-2ARZ employs a JFET-input stage enabling 10 TΩ typical input resistance and 2 pA typical input bias current at 25°C. Its unity-gain stable architecture supports stable operation with capacitive loads up to 100 pF and provides 78° phase margin at AV = 1.
It features a fully differential input stage with common-mode input range extending to the positive supply rail (+15 V) and down to −11.5 V (with ±15 V supplies), enabling high-side sensing without phase reversal-provided inputs remain ≥ −14.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 2 pA typical / 50 pA max - enables direct interfacing with >1 GΩ source impedances without significant DC error. |
| Offset Voltage (B grade) | 1.5 mV max - ensures ≤1.5 mV initial DC error in precision DC-coupled gain stages. |
| Slew Rate | 3.3 V/μs typical - supports 10 V step response settling within 3.5 μs to 0.1% with 10 kΩ load and 100 pF capacitance. |
| Supply Current per Amp | 165 μA typical - allows dual-channel operation at <330 μA total, ideal for battery-powered or thermally constrained systems. |
| Gain Bandwidth Product | 1.4 MHz - sets usable small-signal bandwidth for closed-loop gains up to ~140 at unity-gain stability. |
| CMRR | 90 dB typical - rejects common-mode interference in noisy industrial environments when measuring small differential signals. |
| Operating Temp Range | −40°C to +125°C - qualified for under-hood automotive, process control, and harsh-environment industrial use. |
Pinout & Package
The ADA4062-2ARZ is supplied in an 8-lead narrow-body SOIC (R-8) package, JEDEC-compliant MS-012-AA, with 1.27 mm lead pitch and exposed pad not present. Thermal resistance θJA is 120°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT A | Amplifier A output | Drives external load; rail-to-rail swing (±13.5 V/±13.8 V typical with ±15 V supplies). |
| 2: –IN A | Inverting input A | High-impedance node (10 TΩ); accepts feedback network for inverting configurations. |
| 3: +IN A | Non-inverting input A | High-impedance node; connects to high-Z sensors or reference voltages. |
| 4: V– | Negative supply rail | Reference for internal circuitry; must be established before input signals. |
| 5: +IN B | Non-inverting input B | Independent high-Z input for second channel; no crosstalk with Channel A (135 dB isolation at 1 kHz). |
| 6: –IN B | Inverting input B | Independent high-Z input for second channel; supports separate feedback networks. |
| 7: OUT B | Amplifier B output | Independent output; identical AC/DC specs to OUT A; supports dual-channel signal paths. |
| 8: V+ | Positive supply rail | Reference for internal circuitry; common to both amplifiers; supports ±5 V to ±15 V operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow input bias current | 2 pA typical enables use with photodiode, piezoelectric, and high-value RC filter sources without leakage-induced error. |
| Extended common-mode range | Input accepts voltages up to V+ and down to −11.5 V (at ±15 V), supporting high-side current sensing without level-shifting. |
| No phase reversal on overvoltage | Output remains stable if inputs exceed common-mode range but stay ≥ −14.5 V (for ±15 V supplies), eliminating need for clamping in many cases. |
| Low 0.1 Hz to 10 Hz noise | 1.5 μV p-p enables precision DC and low-frequency measurements in data acquisition and medical front-ends. |
| Dual-channel matching | Tight offset drift (5 μV/°C typical) and gain tracking between channels improve CMRR in 2-op-amp instrumentation amplifier topologies. |
Applications
| High-Side Current Sensing | Micropower Instrumentation Amplifier |
|---|---|
Use Scenario: Monitoring motor phase current in industrial drives using a 0.1 Ω shunt placed between load and positive rail. IC Role / Device Role / Timing Role: Buffering and amplifying the shunt voltage with rail-to-rail input capability and no phase reversal at VIN = +15 V. Use Value: Eliminates need for level-shifting circuitry; achieves <1.5 mV offset error and 135 dB channel separation for clean differential measurement. | Use Scenario: Building a low-power, two-op-amp instrumentation amplifier for thermocouple or strain gauge readout in portable test equipment. IC Role / Device Role / Timing Role: Dual amplifier providing matched gain stages with 5 μV/°C drift and 2 pA bias current to minimize thermal and leakage errors. Use Value: Delivers ~100× gain with <330 μA total supply current and maintains >100 dB CMRR via on-die channel matching. |
| High-Impedance Sensor Buffering | 60 Hz Notch Filter |
Use Scenario: Interfacing with pH electrodes or piezoelectric accelerometers having >100 MΩ source impedance. IC Role / Device Role / Timing Role: Unity-gain buffer isolating high-Z source from downstream circuitry while preserving signal integrity. Use Value: 10 TΩ input resistance prevents loading; 1.5 mV offset ensures accurate DC baseline; 3.3 V/μs slew rate supports transient response. | Use Scenario: Removing 60 Hz mains interference from biomedical ECG or EEG signals in clinical monitoring devices. IC Role / Device Role / Timing Role: Voltage follower driving twin-T notch network; leverages high input Z and low bias current to enable precise R/C ratio setting. Use Value: Achieves >50 dB attenuation at 60 Hz with 1% passive components; 1.4 MHz GBW ensures stable operation at 100× center frequency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual JFET-input op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8642ARZ | Faster slew rate (12 V/μs), higher supply current (1.2 mA/amp), CMOS input (not JFET), lower input bias current (1 pA typ) but higher voltage noise (12 nV/√Hz vs. 36 nV/√Hz). | Better for high-speed, low-noise AC-coupled applications; unsuitable for ultra-high-Z DC-coupled sensors due to lower input resistance (~1012 Ω vs. 1013 Ω). | Select AD8642ARZ when bandwidth >10 MHz and supply current >1 mA is acceptable; retain ADA4062-2ARZ for sub-1 MHz, <330 μA, or >1 GΩ source impedance needs. |
| TL072CDR | JFET input, but higher offset (6 mV max), higher bias current (200 pA max), wider temp range (0°C to +70°C only), no guaranteed −40°C to +125°C operation. | Cost-sensitive general-purpose designs where extended temperature and precision are not required. | Choose TL072CDR for commercial-grade audio or non-critical filtering; ADA4062-2ARZ is required for industrial-grade precision, low power, or wide-temp operation. |
Compared with AD8642ARZ and TL072CDR, the ADA4062-2ARZ uniquely balances ultralow bias current (2 pA), extended temperature rating (−40°C to +125°C), and micropower operation (165 μA/amp) in a single dual JFET-input device-making it irreplaceable for high-Z, wide-temp, battery-constrained instrumentation.
Availability
ADA4062-2ARZ is available at Aetrix Electronics and suitable for industrial process controls, body probe electronics, and active filter designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADA4062-2ARZ 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, communications, automotive, and healthcare markets.
The ADA4062 family was designed specifically for precision, low-power, high-input-impedance signal conditioning in harsh-environment instrumentation-emphasizing JFET input performance, wide temperature operation, and micropower efficiency.
FAQ
What is the maximum input common-mode voltage for ADA4062-2ARZ with ±15 V supplies?
The ADA4062-2ARZ supports an input common-mode voltage range of −11.5 V to +15 V with ±15 V supplies. This allows direct high-side sensing up to the positive rail without level shifting, and its output does not phase-reverse unless inputs fall below −14.5 V-making it robust for rail-referenced applications. The ADA4062-2ARZ datasheet confirms this range in Table 2 under "Input Voltage Range".
Does ADA4062-2ARZ require external compensation for unity-gain stability?
No, the ADA4062-2ARZ is internally compensated for unity-gain stability. It achieves 78° phase margin at AV = 1 with a 10 kΩ load and 100 pF capacitive load, as verified in Figure 24 and the "Dynamic Performance" section of the datasheet. No external compensation components are needed for standard gain configurations, simplifying layout and reducing BOM count for the ADA4062-2ARZ.
What is the typical supply current per amplifier for ADA4062-2ARZ at ±5 V?
The typical supply current per amplifier for ADA4062-2ARZ is 165 μA at ±15 V, and Figure 18 shows it decreases to ~130 μA at ±5 V. This low quiescent current enables dual-channel operation below 260 μA total-critical for battery-powered instrumentation. The ADA4062-2ARZ maintains full specification compliance across the ±5 V to ±15 V supply range.
Can ADA4062-2ARZ drive a 100 pF capacitive load without oscillation?
Yes, the ADA4062-2ARZ is specified to drive up to 100 pF capacitive loads stably in unity-gain configuration, with measured overshoot <10% (Figure 31) and phase margin of 78° (Table 2). Its internal compensation and low output impedance (<1 Ω at 1 kHz) ensure stability without external isolation resistors-unlike many older JFET op amps. This behavior is confirmed for the ADA4062-2ARZ in the "Dynamic Performance" and "Typical Performance Characteristics" sections.
Is ADA4062-2ARZ pin-compatible with other SOIC-8 dual op amps like OP2177 or AD8602?
No, ADA4062-2ARZ is not pin-compatible with OP2177 or AD8602. Its pinout (OUT A, –IN A, +IN A, V–, +IN B, –IN B, OUT B, V+) differs from industry-standard dual op amp configurations (e.g., AD8602 uses –IN A, +IN A, V–, OUT A, OUT B, +IN B, –IN B, V+). Layout reuse requires verification against the ADA4062-2ARZ pin diagram in Figure 1; substituting without redesign risks functional failure. Always consult the ADA4062-2ARZ pinout before board revision.
ADA4062-2ARZ 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:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 3.3V/µs
- Gain Bandwidth Product:
- 1.4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 pA
- Voltage - Input Offset:
- 750 µV
- Current - Supply:
- 165µA (x2 Channels)
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 8 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADA4062-2ARZ FAQ
1.How can I place an order for ADA4062-2ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4062-2ARZ 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 ADA4062-2ARZ reliable?
The price and inventory of ADA4062-2ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4062-2ARZ is usually 5 days.
3.What payment methods are accepted for ADA4062-2ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4062-2ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4062-2ARZ?
ADA4062-2ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4062-2ARZ 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 ADA4062-2ARZ?
For technical support, including ADA4062-2ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4062-2ARZ requirements.
6.How does Aetrix verify that ADA4062-2ARZ is sourced from the original manufacturer or authorized distributors?
All ADA4062-2ARZ 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 ADA4062-2ARZ meets industry standards.
7.What is the process for return or replacement of ADA4062-2ARZ?
All ADA4062-2ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADA4062-2ARZ, 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 ADA4062-2ARZ part is unused and in its original packaging.
Return procedure for ADA4062-2ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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