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Analog Devices Inc. ADA4622-1ARZ-R7
- Part No.:
- ADA4622-1ARZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADA4622-1ARZ-R7.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,449
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Product details
Overview
ADA4622-1ARZ-R7 from Analog Devices is a single-channel, precision JFET-input operational amplifier optimized for high-impedance sensor interfaces and ADC driving. It delivers 8 MHz gain bandwidth, 23 V/µs slew rate (low-to-high), ±10 pA max input bias current at 25°C, ±0.35 mV max offset voltage (B grade), and rail-to-rail output swing - enabling accurate signal conditioning in photodiode preamps and precision filters operating from 5 V to 30 V supplies.
For engineers reviewing the ADA4622-1ARZ-R7 datasheet, ADA4622-1ARZ-R7 pinout, ADA4622-1ARZ-R7 application, or ADA4622-1ARZ-R7 equivalent, this page provides verified specifications, package-specific pin functions, real-world use cases, and validated alternative options - all grounded in Analog Devices' Rev. F datasheet and official ordering guide.
Technical Context
The ADA4622-1ARZ-R7 implements a low-noise N-channel JFET input stage with input common-mode range extending to the negative rail (V−) and robust EMI rejection (90 dB at 1 GHz/2.4 GHz). Its architecture eliminates phase reversal up to V+ and supports stable operation with capacitive loads up to 100 pF.
It features internal EMI filtering, shutdown capability (60 µA shutdown current), and improved DC precision over AD820-family predecessors - including halved offset voltage, added thermal drift specification (±1 µV/°C B grade), and enhanced CMRR (up to 100 dB) for noninverting and difference amplifier configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 8 MHz typical - enables stable closed-loop operation up to 100 kHz with gain ≥80, suitable for anti-aliasing filter stages before SAR ADCs. |
| Slew Rate (Low→High) | 23 V/µs typical - ensures ≤2 µs settling to 0.01% for 10 V step, critical for fast-settling ADC driver applications. |
| Input Bias Current | ±10 pA max at 25°C - preserves signal integrity in >100 MΩ source impedance circuits like photodiode transimpedance amplifiers. |
| Offset Voltage (B Grade) | ±0.35 mV max at 25°C - reduces DC error in precision instrumentation front-ends without trimming. |
| EMI Rejection Ratio | 90 dB at 1 GHz and 2.4 GHz - suppresses RF interference from nearby switching regulators or wireless modules. |
| Rail-to-Rail Output | Swings within 50 mV of rails at 1 mA load - maximizes dynamic range in single-supply systems (e.g., 5 V or 3.3 V). |
| Supply Range | 5 V to 30 V (±2.5 V to ±15 V) - supports industrial and automotive power domains while maintaining specified performance. |
Pinout & Package
ADA4622-1ARZ-R7 is packaged in an 8-lead MSOP (Mini Small Outline Package) with exposed pad. This thermally enhanced surface-mount package measures 3 mm × 3 mm × 1.1 mm and is rated for −40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output node; drives loads up to 20 mA with <50 mV headroom to rails at 1 mA. |
| 2 | −IN | Inverting input; high-impedance JFET node with 0.4 pF differential capacitance. |
| 3 | +IN | Noninverting input; matched to −IN for optimal CMRR and offset matching. |
| 4 | V− | Negative supply connection; input common-mode extends to V− −0.2 V. |
| 5 | +IN (NC) | Not internally connected - no electrical function; must be left floating or tied to ground per layout best practice. |
| 6 | −IN (NC) | Not internally connected - no electrical function; must be left floating or tied to ground. |
| 7 | V+ | Positive supply connection; exposed pad (EPAD) must be soldered and connected to V+ for thermal and EMI performance. |
| 8 | DISABLE | Active-low shutdown control; pulls supply current to 60 µA when logic low, enabling power-gating in battery systems. |
Key Features
| Feature | Design Value |
|---|---|
| Next-generation AD820 upgrade | Halves offset voltage and adds guaranteed thermal drift spec (±1 µV/°C B grade), enabling drop-in replacement in legacy designs requiring tighter DC stability. |
| JFET input stage | Delivers ±10 pA max IB and 12.5 nV/√Hz voltage noise at 1 kHz - optimal for high-Z sensors where current noise dominates total error. |
| EMI-hardened architecture | 90 dB rejection at cellular/WiFi frequencies eliminates need for external RF filtering in noisy industrial or medical environments. |
| Rail-to-rail output + wide IVR | Input accepts signals down to V− and output swings to within 50 mV of both rails - simplifies single-supply system design without level-shifting. |
| Shutdown mode | Reduces quiescent current from 750 µA to 60 µA - extends battery life in portable instrumentation and IoT edge nodes. |
Applications
| Photodiode Sensor Interface | ADC Driver for SAR Converters |
|---|---|
Use Scenario: Amplifying weak current from a reverse-biased photodiode in optical smoke detection or spectrophotometry. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with precision DC gain and low input current error. Use Value: ±10 pA max input bias current minimizes dark-current-induced offset; rail-to-rail output preserves full dynamic range into 5 V ADC reference. |
Use Scenario: Driving the switched-capacitor input of a 16-bit SAR ADC in data acquisition systems. IC Role / Device Role / Timing Role: High-speed, low-distortion buffer with fast settling (<2 µs to 0.01%) and low THD+N (0.00035% at 1 kHz). Use Value: 23 V/µs slew rate and 8 MHz GBP ensure full-scale steps settle before ADC sampling window closes. |
| Precision Active Filter Stage | High-Impedance Signal Conditioning |
Use Scenario: Implementing 2nd-order low-pass filtering in strain-gauge or RTD measurement front-ends. IC Role / Device Role / Timing Role: Unity-gain stable op amp with 53° phase margin and low 1/f noise (0.75 µV p-p, 0.1–10 Hz). Use Value: ±0.35 mV max offset and ±1 µV/°C drift maintain filter DC accuracy across −40°C to +125°C industrial temperature range. |
Use Scenario: Buffering high-output-impedance pH probe or ion-selective electrode outputs. IC Role / Device Role / Timing Role: Unity-gain follower with >1 TΩ input resistance and minimal loading error. Use Value: Input voltage range includes V− allows direct connection to probes referenced to system ground without level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4610-1ARMZ-R7 | Lower GBP (16.3 MHz), higher supply current (1.2 mA), no shutdown pin, same 8-lead MSOP package. | Better for wideband AC-coupled applications; unsuitable where ultra-low IB (<10 pA) or shutdown is required. | Select if bandwidth >10 MHz is needed and DC precision is secondary to speed. |
| OPA140AIDBVR | FET-input, 11 MHz GBP, 20 V/µs slew, ±0.12 mV max offset, SOT-23-5 package (no DISABLE pin). | Lacks shutdown and EMI filtering; smaller footprint but no thermal EPAD - limits power dissipation in continuous high-load operation. | Choose for space-constrained PCBs where shutdown and EMI immunity are not critical. |
Compared with ADA4622-1ARZ-R7, ADA4610-1ARMZ-R7 trades lower input bias current and EMI rejection for higher speed, while OPA140AIDBVR offers superior offset but sacrifices shutdown control and thermal robustness - making ADA4622-1ARZ-R7 uniquely balanced for precision, low-power, noise-immune industrial sensing.
Availability
ADA4622-1ARZ-R7 is available at Aetrix Electronics and suitable for photodiode interfaces, SAR ADC drivers, and precision active filters requiring stable component supply across extended temperature and voltage ranges.
Supply support for ADA4622-1ARZ-R7 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, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADA4622 family was designed specifically to upgrade legacy AD820-series op amps in high-impedance, low-noise, single-supply applications - delivering measurable improvements in offset, drift, EMI immunity, and rail-to-rail output drive without changing board layout.
FAQ
What is the maximum supply voltage for ADA4622-1ARZ-R7?
The ADA4622-1ARZ-R7 has an absolute maximum supply voltage rating of 36 V. Its recommended operating range is 5 V to 30 V (±2.5 V to ±15 V), with full specifications guaranteed across this span. Operation beyond 30 V may degrade long-term reliability and is not characterized per the Rev. F datasheet.
Does ADA4622-1ARZ-R7 support true rail-to-rail input?
No. The ADA4622-1ARZ-R7 supports rail-to-rail *output* and its input common-mode range extends to the negative rail (V−), but not to the positive rail - it stops ~1 V below V+. This is confirmed in the "Input Characteristics" section of the datasheet, where IVR is specified as −15.2 V to +14 V under ±15 V supplies.
What is the purpose of the DISABLE pin on ADA4622-1ARZ-R7?
The DISABLE pin (Pin 8) is an active-low shutdown control. When pulled low, it reduces supply current from 750 µA to 60 µA while disabling the output stage. This feature is unique to the ADA4622-1 variant and enables power gating in battery-powered or energy-conscious systems without removing power from the entire circuit.
Is ADA4622-1ARZ-R7 pin-compatible with AD820ARZ?
No. While ADA4622-1ARZ-R7 is a functional upgrade to AD820, it uses an 8-lead MSOP package with DISABLE and two NC pins, whereas AD820ARZ uses an 8-lead SOIC_N with different pinout (no DISABLE, different NC locations). Board redesign is required for replacement - it is not a drop-in substitute.
What thermal considerations apply to ADA4622-1ARZ-R7 in MSOP package?
The ADA4622-1ARZ-R7 in 8-lead MSOP has θJA = 185°C/W on a 2-layer JEDEC board. To maintain junction temperature ≤125°C at 750 µA supply current and 15 V supply, keep ambient ≤85°C or add copper pour connected to the EPAD (which must be tied to V+). Thermal derating is required above 85°C ambient per Table 5 in the datasheet.
ADA4622-1ARZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 23V/µs
- Gain Bandwidth Product:
- 8 MHz
- -3db Bandwidth:
- 15.5 MHz
- Current - Input Bias:
- 2 pA
- Voltage - Input Offset:
- 400 µV
- Current - Supply:
- 715µA
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADA4622-1ARZ-R7 FAQ
1.How can I place an order for ADA4622-1ARZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4622-1ARZ-R7 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 ADA4622-1ARZ-R7 reliable?
The price and inventory of ADA4622-1ARZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4622-1ARZ-R7 is usually 5 days.
3.What payment methods are accepted for ADA4622-1ARZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4622-1ARZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4622-1ARZ-R7?
ADA4622-1ARZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4622-1ARZ-R7 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 ADA4622-1ARZ-R7?
For technical support, including ADA4622-1ARZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4622-1ARZ-R7 requirements.
6.How does Aetrix verify that ADA4622-1ARZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADA4622-1ARZ-R7 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 ADA4622-1ARZ-R7 meets industry standards.
7.What is the process for return or replacement of ADA4622-1ARZ-R7?
All ADA4622-1ARZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADA4622-1ARZ-R7, 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 ADA4622-1ARZ-R7 part is unused and in its original packaging.
Return procedure for ADA4622-1ARZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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