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Analog Devices Inc. ADA4622-1ARZ
- Part No.:
- ADA4622-1ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADA4622-1ARZ.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,145
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Product details
Overview
ADA4622-1ARZ from Analog Devices is a single-channel, precision JFET-input operational amplifier optimized for high-impedance sensor interfaces and ADC driving in single-supply systems. It delivers 8 MHz gain bandwidth, ±10 pA max input bias current at 25°C, ±0.35 mV max offset voltage (B grade), rail-to-rail output swing, and operates from 5 V to 30 V supply. It is widely used in photodiode transimpedance amplifiers requiring low noise and high DC accuracy.
For engineers reviewing the ADA4622-1ARZ datasheet, ADA4622-1ARZ pinout, ADA4622-1ARZ application, or ADA4622-1ARZ equivalent, this page provides verified specifications, package-specific pin functions, real-world use cases in precision signal conditioning, and validated alternative options for design flexibility and supply continuity.
Technical Context
The ADA4622-1ARZ employs an N-channel JFET input stage enabling ultra-low input bias current (±10 pA max) and high input impedance (>10¹³ Ω), critical for interfacing with high-output-impedance sources like photodiodes and piezoelectric sensors. Its input common-mode range extends to the negative rail (V−), and its rail-to-rail output supports full dynamic range utilization in low-voltage, single-supply applications.
It features integrated EMI rejection filters (90 dB at 1 GHz/2.4 GHz), 23 V/µs slew rate (low-to-high), and improved CMRR (up to 100 dB) over legacy AD820-series op amps-enabling stable performance in noisy industrial or RF-adjacent environments without external filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 8 MHz typical - enables stable closed-loop operation up to ~7 MHz at unity gain, suitable for driving SAR ADC inputs with fast settling. |
| Input Bias Current | ±10 pA maximum at TA = 25°C - ensures minimal error in high-Z sensor circuits (e.g., >100 MΩ photodiode feedback paths). |
| Offset Voltage (B grade) | ±0.35 mV maximum at TA = 25°C - supports sub-16-bit DC accuracy in precision instrumentation without trimming. |
| Slew Rate | 23 V/µs (low-to-high), −18 V/µs (high-to-low) - allows clean 10 V step response in <2 µs, critical for multiplexed ADC front-ends. |
| Supply Range | 5 V to 30 V (±2.5 V to ±15 V) - supports wide industrial input rails while maintaining rail-to-rail output swing and low dropout. |
| EMI Rejection Ratio | 90 dB at 1000 MHz and 2400 MHz - suppresses RF interference from Wi-Fi/Bluetooth modules without external ferrites or shielding. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, motor control, and industrial PLC environments. |
Pinout & Package
The ADA4622-1ARZ is packaged in an 8-lead MSOP (Mini Small Outline Package), pin-compatible with industry-standard SOIC_N footprints but with 33% smaller board area. Thermal resistance θJA is 185°C/W on 1-layer JEDEC board, requiring thermal vias for high-temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NIC | Not internally connected - must be left floating or grounded per layout best practices; no internal function. |
| 2 | −IN | Inverting input - connects to feedback network in standard op amp configurations; high-impedance JFET node. |
| 3 | +IN | Noninverting input - accepts high-Z sensor signals; common-mode range includes V− (−0.2 V below rail). |
| 4 | V− | Negative supply - supports single-supply operation down to 0 V; also serves as reference for input common-mode. |
| 6 | OUT | Amplifier output - rail-to-rail capable (e.g., 4.97 V high / −4.94 V low at ±5 V supply); drives 15 mA load. |
| 7 | V+ | Positive supply - accepts up to 30 V; exposed pad (EPAD) must be connected to V+ for thermal and electrical integrity. |
| 8 | DISABLE | Active-low shutdown control - reduces supply current to 50 µA; enables power-gating in battery-powered systems. |
Key Features
| Feature | Design Value |
|---|---|
| JFET input stage | Enables ±10 pA max input bias current and >10¹³ Ω input resistance - preserves signal integrity in photodiode and pH electrode interfaces. |
| Rail-to-rail output | Swings within 30 mV of rails at 1 mA load - maximizes dynamic range in 3.3 V or 5 V data acquisition systems. |
| EMI filtering | 90 dB rejection at 1 GHz/2.4 GHz - eliminates need for external RF chokes in IoT sensor nodes near wireless transceivers. |
| B-grade precision | ±0.35 mV offset and ±1 µV/°C drift (ADA4622-1 only) - meets 16-bit system accuracy requirements without calibration. |
| Shutdown mode | 50 µA quiescent current - extends battery life in portable instrumentation and remote sensor transmitters. |
Applications
| Photodiode Transimpedance Amplifier | High-Voltage Precision ADC Driver |
|---|---|
Use Scenario: Converting weak photocurrent (pA–nA) from a reverse-biased photodiode into a stable voltage signal for digitization. IC Role / Device Role / Timing Role: Primary transimpedance amplifier with ultra-low input bias current and low 1/f noise to minimize dark current error and baseline drift. Use Value: Enables >120 dB dynamic range in optical smoke detectors and spectrophotometers due to ±10 pA IB and 0.75 µV p-p 0.1–10 Hz noise. |
Use Scenario: Driving the input of a 16-bit SAR ADC (e.g., AD7980) in a programmable logic controller analog input module. IC Role / Device Role / Timing Role: Buffer and level-shifter between signal-conditioning stage and ADC sample capacitor; handles charge kickback and settles in <2 µs. Use Value: 23 V/µs slew rate and 8 MHz GBP ensure 0.01% settling in 2.0 µs, meeting 1 MSPS ADC timing budgets without external isolation resistors. |
| Precision Single-Supply Instrumentation Amplifier Front-End | EMI-Robust Industrial Sensor Signal Conditioning |
Use Scenario: Amplifying low-level bridge sensor outputs (e.g., load cells, RTDs) in 5 V or 12 V powered field transmitters. IC Role / Device Role / Timing Role: First-stage gain block with rail-to-rail input/output and high CMRR (≥87 dB) to reject common-mode noise from long sensor cables. Use Value: Input voltage range including V− and ±0.35 mV offset enable true 0–5 V measurement span with <0.01% linearity error over temperature. |
Use Scenario: Signal conditioning for pressure or temperature sensors mounted near variable-frequency drives or switching power supplies. IC Role / Device Role / Timing Role: Low-noise, high-PSRR buffer that rejects conducted and radiated EMI without external LC filters. Use Value: 90 dB EMIRR at 2.4 GHz and 103 dB PSRR suppress noise from adjacent 2.4 GHz ISM-band emitters, eliminating false triggers in safety-critical systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA140AIDBVR | Lower voltage noise (5.1 nV/√Hz vs. 12.5 nV/√Hz), but higher input bias current (±20 pA vs. ±10 pA); no DISABLE pin. | Better for low-source-impedance, wideband applications (e.g., audio preamps); less suited for >100 MΩ photodiode circuits. | Choose OPA140AIDBVR when voltage noise dominates error budget and shutdown is unnecessary. |
| ADA4610-1ARZ | Higher slew rate (40 V/µs), wider GBW (18 MHz), but higher supply current (1.2 mA vs. 750 µA) and no EMI filtering. | Preferred for high-speed active filters or composite amplifier topologies; lacks EMI robustness for wireless-adjacent designs. | Choose ADA4610-1ARZ when bandwidth and speed outweigh power and EMI requirements. |
Compared with OPA140AIDBVR and ADA4610-1ARZ, the ADA4622-1ARZ uniquely balances ultra-low input bias current, integrated EMI rejection, and shutdown capability-making it optimal for battery-powered, high-Z sensor nodes where reliability in noisy environments is non-negotiable.
Availability
ADA4622-1ARZ is available at Aetrix Electronics and suitable for photodiode interface circuits, precision ADC driver stages, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADA4622-1ARZ 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 ADA4622 family was designed as a next-generation upgrade to the AD820/AD822 series, targeting precision, low-power, single-supply applications demanding rail-to-rail output, JFET input performance, and enhanced EMI immunity in harsh electromagnetic environments.
FAQ
What is the maximum supply voltage rating for the ADA4622-1ARZ?
The ADA4622-1ARZ has an absolute maximum supply voltage rating of 36 V, with recommended operating range from 5 V to 30 V (±2.5 V to ±15 V). Operation beyond 30 V is not characterized and may compromise long-term reliability or parametric performance. Always observe the 0.3 V input overvoltage limit relative to supply rails.
Does the ADA4622-1ARZ support true rail-to-rail input operation?
No-the ADA4622-1ARZ supports rail-to-rail *output*, but its input common-mode range extends only to the negative rail (V−) and up to ~1 V below the positive rail (V+). At ±5 V supply, IVR is −5.2 V to +4 V; at 5 V single supply, IVR is −0.2 V to +4 V. Input voltages exceeding V+ − 1 V degrade bandwidth and increase offset error.
What is the purpose of the DISABLE pin on the ADA4622-1ARZ?
The DISABLE pin (Pin 8) is an active-low shutdown control that reduces total supply current to 50 µA (typical) when pulled low. This feature enables dynamic power gating in portable or energy-harvesting systems. When disabled, the output enters high-impedance state and amplifier core is powered down-no output clamping or leakage path is guaranteed during disable.
How does the ADA4622-1ARZ compare to the AD820 in terms of offset voltage drift?
The ADA4622-1ARZ (B grade) specifies ±1 µV/°C maximum offset voltage drift over −40°C to +125°C, whereas the AD820 specifies ±5 µV/°C. This 5× improvement enables stable DC performance in uncalibrated industrial temperature monitoring systems, reducing or eliminating the need for periodic recalibration in field-deployed equipment.
Is the ADA4622-1ARZ pin-compatible with the ADA4622-1ARMZ?
Yes-the ADA4622-1ARZ (8-lead MSOP) and ADA4622-1ARMZ (8-lead SOIC_N) share identical pin numbering and function definitions per Analog Devices' Pin Configurations and Function Descriptions section (Rev. F, p.11–12). Both include NIC (Pin 1), −IN (Pin 2), +IN (Pin 3), V− (Pin 4), OUT (Pin 6), V+ (Pin 7), and DISABLE (Pin 8). Footprint adaptation is required, but schematic reuse is fully supported.
ADA4622-1ARZ 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:
- 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:
- 40 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 FAQ
1.How can I place an order for ADA4622-1ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4622-1ARZ 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 reliable?
The price and inventory of ADA4622-1ARZ 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 is usually 5 days.
3.What payment methods are accepted for ADA4622-1ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4622-1ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4622-1ARZ?
ADA4622-1ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4622-1ARZ 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?
For technical support, including ADA4622-1ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4622-1ARZ requirements.
6.How does Aetrix verify that ADA4622-1ARZ is sourced from the original manufacturer or authorized distributors?
All ADA4622-1ARZ 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 meets industry standards.
7.What is the process for return or replacement of ADA4622-1ARZ?
All ADA4622-1ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADA4622-1ARZ, 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 part is unused and in its original packaging.
Return procedure for ADA4622-1ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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