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Analog Devices Inc. ADA4622-2BRZ
- Part No.:
- ADA4622-2BRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADA4622-2BRZ.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:177
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Product details
Overview
ADA4622-2BRZ from Analog Devices is a dual-channel, precision JFET-input operational amplifier optimized for single-supply and rail-to-rail output (RRO) operation. It delivers 8 MHz gain bandwidth, ±10 pA max input bias current at 25°C, ±0.35 mV max offset voltage (B grade), and operates from 5 V to 30 V across −40°C to +125°C - enabling high-accuracy photodiode transimpedance amplification in industrial sensor front-ends.
For engineers reviewing the ADA4622-2BRZ datasheet, ADA4622-2BRZ pinout, ADA4622-2BRZ application, or ADA4622-2BRZ equivalent, this page provides verified package mapping (8-lead SOIC_N), channel-matched DC and dynamic specs, EMI-hardened performance (90 dB EMIRR at 1 GHz/2.4 GHz), and real-world design context for precision signal conditioning with low-noise, high-Z sources.
Technical Context
The ADA4622-2BRZ uses an N-channel JFET input stage to achieve ultra-low input bias current (±10 pA max) and high input impedance (>10¹³ Ω), while maintaining rail-to-rail output swing (±14.5 V at ±15 V supply) and wide common-mode range (down to V−). Its internal EMI filters suppress switching noise coupling at 1 GHz and 2.4 GHz without external components.
It features matched dual channels with ≤1 mV offset voltage match and ≤0.5 mV max offset over temperature, supporting differential and instrumentation configurations. The 23 V/µs slew rate (low-to-high) and 7–8 MHz GBP enable fast settling (<2 µs to 0.01%) into SAR ADC drivers and active filter stages under load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 8 MHz typical - supports stable unity-gain and closed-loop gains up to 100 with ≥50° phase margin. |
| Slew Rate (low-to-high) | 23 V/µs typical at ±15 V - enables full-scale step response in <1.5 µs for 0.1% settling into 2 kΩ//15 pF loads. |
| Input Bias Current | ±10 pA maximum at TA = 25°C - preserves signal integrity in high-impedance photodiode and piezoelectric sensor interfaces. |
| Offset Voltage (B grade) | ±0.35 mV maximum at TA = 25°C - reduces DC error in precision gain stages and reference buffers. |
| EMI Rejection Ratio | 90 dB typical at 1000 MHz and 2400 MHz - mitigates RF interference from Wi-Fi, Bluetooth, and switching regulators without shielding. |
| Supply Voltage Range | 5 V to 30 V (±2.5 V to ±15 V) - supports single-supply industrial systems and dual-supply test equipment. |
| Operating Temperature | −40°C to +125°C - qualified for automotive engine control units, motor drives, and downhole instrumentation. |
Pinout & Package
ADA4622-2BRZ is packaged in an 8-lead SOIC_N (Small Outline Integrated Circuit, Narrow) with standard industry pinout and no exposed pad. This RoHS-compliant surface-mount package measures 4.9 mm × 3.9 mm × 1.75 mm and supports reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - rail-to-rail capable, drives 20 mA min into resistive loads. |
| 2 | −IN A | Inverting input of Channel A - high-impedance JFET node; connects to feedback network in inverting configurations. |
| 3 | +IN A | Noninverting input of Channel A - accepts input signals down to V−; used in buffer, follower, and noninverting gain stages. |
| 4 | V− | Negative supply rail - referenced to system ground in single-supply operation; must be decoupled with 0.1 µF ceramic capacitor. |
| 5 | +IN B | Noninverting input of Channel B - electrically isolated from Channel A; enables dual-sensor signal paths or differential pair implementation. |
| 6 | −IN B | Inverting input of Channel B - matches Channel A's input characteristics for consistent gain and offset behavior. |
| 7 | OUT B | Amplifier B output - identical drive capability and settling performance as OUT A; supports independent load driving. |
| 8 | V+ | Positive supply rail - supplies both amplifiers; requires local 0.1 µF ceramic bypass near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Drives within 50 mV of rails at ±15 V supply (VOH = 14.95 V, VOL = −14.955 V @ 1 mA), enabling full dynamic range utilization in low-voltage data acquisition. |
| EMI-hardened input architecture | 90 dB rejection at 1 GHz and 2.4 GHz eliminates need for external RF filtering in noisy industrial environments with switch-mode power supplies or wireless modules. |
| Low 1/f noise and broadband noise | 0.75 µV p-p (0.1–10 Hz), 12.5 nV/√Hz at 1 kHz - ensures minimal low-frequency drift and clean signal fidelity in precision weigh scales and medical biosensors. |
| Matched dual-channel performance | ≤1 mV offset voltage match and ≤0.5 mV max offset over temperature - supports accurate differential amplification and chopper-stabilized reference circuits. |
| Input voltage range includes V− | IVR extends to (V−) −0.2 V - allows direct interfacing with grounded sensors and level-shifting circuits without external bias networks. |
Applications
| Photodiode Transimpedance Amplifier | High-Voltage Precision ADC Driver |
|---|---|
|
Use Scenario: Converting weak photocurrent (pA–nA) from optical encoders or spectrophotometers into stable voltage output. IC Role / Device Role / Timing Role: Primary transimpedance amplifier with ultra-low IB and matched inputs to minimize dark-current error and thermal drift. Use Value: ±10 pA max IB and ±2 µV/°C max drift (B grade) reduce measurement uncertainty in ambient-temperature-variable optical sensing systems. |
Use Scenario: Driving the switched-capacitor input of 16-bit+ SAR ADCs (e.g., AD7980, ADS8860) in automated test equipment. IC Role / Device Role / Timing Role: High-speed, low-distortion buffer with 23 V/µs slew rate and <2 µs 0.01% settling to ensure accurate sampling without aperture jitter. Use Value: 0.00035% THD+N at 1 kHz and 500 kHz bandwidth enables >95 dB SNR in high-resolution data acquisition front-ends. |
| Precision Active Low-Pass Filter | Industrial Sensor Signal Conditioning |
|
Use Scenario: Implementing 2nd-order Butterworth anti-aliasing filters for vibration monitoring in predictive maintenance systems. IC Role / Device Role / Timing Role: Dual-channel op amp configured as unity-gain Sallen-Key topology with matched gain and phase response. Use Value: ≤1 mV offset match and 8 MHz GBP allow precise cutoff frequency control and minimal passband ripple across temperature. |
Use Scenario: Conditioning outputs from strain gauges, RTDs, and thermocouples in PLC analog input modules. IC Role / Device Role / Timing Role: Precision instrumentation-grade amplifier with rail-to-rail output and high CMRR (≥85 dB) for rejecting common-mode noise on long sensor cables. Use Value: 87 dB min CMRR at ±15 V and −40°C to +125°C operation ensures stable gain accuracy in electrically noisy factory-floor environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2182 | Lower offset drift (±0.012 µV/°C), higher supply current (650 µA vs. 675 µA), no EMI filtering. | Better for ultra-stable DC references; lacks integrated EMI hardening for RF-noisy environments. | Choose OPA2182 when sub-µV/°C drift dominates over EMI robustness and cost sensitivity. |
| AD8622 | Higher input bias current (±20 pA), lower GBP (5.5 MHz), same SOIC-8 package. | Less suitable for high-Z photodiode interfaces; limited bandwidth restricts use in fast-settling ADC drivers. | Choose AD8622 only for legacy drop-in replacement where EMI immunity and speed are not critical. |
Compared with OPA2182 and AD8622, the ADA4622-2BRZ uniquely balances ultra-low IB (±10 pA), EMI resilience (90 dB at 2.4 GHz), and 8 MHz bandwidth - making it optimal for next-generation industrial sensors where RF noise, source impedance, and settling time jointly constrain performance.
Availability
ADA4622-2BRZ is available at Aetrix Electronics and suitable for photodiode interface circuits, SAR ADC driver stages, and precision active filter designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADA4622-2BRZ 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 as a next-generation upgrade to the AD820/AD822 series, targeting precision, low-noise, single-supply signal conditioning in harsh electromagnetic environments - especially for sensor front-ends and data acquisition systems.
FAQ
What is the maximum supply voltage for ADA4622-2BRZ?
The ADA4622-2BRZ 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). Operation at 30 V is fully specified across −40°C to +125°C, with all key parameters including offset voltage, slew rate, and GBP validated per Rev. F datasheet Table 1–3.
Does ADA4622-2BRZ support true rail-to-rail input?
No - the ADA4622-2BRZ features rail-to-rail *output*, but its input common-mode range extends only to V− (and slightly below) and up to ~1 V below V+. Specifically, IVR = −15.2 V to +14 V at ±15 V supply. Input voltages beyond this range may cause increased offset error or bandwidth reduction, as documented in Figure 81 of the datasheet.
What is the thermal resistance (θJA) of ADA4622-2BRZ in SOIC_N package?
For the ADA4622-2BRZ in 8-lead SOIC_N package, θJA is 120°C/W on a 2-layer JEDEC board and not applicable (N/A) for junction-to-case, per Table 5 of the Rev. F datasheet. This value assumes standard PCB layout with 1 oz copper and minimal copper pour; actual thermal performance depends on board layout and airflow.
Is ADA4622-2BRZ pin-compatible with AD822ARZ?
No - although both are dual JFET-input op amps in SOIC-8 packages, ADA4622-2BRZ uses a different pinout: Pin 1 = OUT A, Pin 2 = −IN A, Pin 3 = +IN A, Pin 4 = V−, Pin 5 = +IN B, Pin 6 = −IN B, Pin 7 = OUT B, Pin 8 = V+. AD822ARZ assigns Pin 1 = −IN A, Pin 2 = +IN A, Pin 3 = V−, Pin 4 = OUT A, Pin 5 = OUT B, Pin 6 = V+, Pin 7 = +IN B, Pin 8 = −IN B. PCB redesign is required for migration.
What is the shutdown functionality of ADA4622-2BRZ?
The ADA4622-2BRZ does not include a shutdown pin. Shutdown capability is only available on the single-channel ADA4622-1 variant (e.g., ADA4622-1ARMZ), which features an active-low DISABLE pin (Pin 8 in MSOP/SOIC packages). The ADA4622-2BRZ remains operational whenever powered and has no quiescent current reduction mode.
ADA4622-2BRZ 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:
- 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:
- 665µA (x2 Channels)
- 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
ADA4622-2BRZ FAQ
1.How can I place an order for ADA4622-2BRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4622-2BRZ 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 ADA4622-2BRZ reliable?
The price and inventory of ADA4622-2BRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4622-2BRZ is usually 5 days.
3.What payment methods are accepted for ADA4622-2BRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4622-2BRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4622-2BRZ?
ADA4622-2BRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4622-2BRZ 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 ADA4622-2BRZ?
For technical support, including ADA4622-2BRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4622-2BRZ requirements.
6.How does Aetrix verify that ADA4622-2BRZ is sourced from the original manufacturer or authorized distributors?
All ADA4622-2BRZ 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 ADA4622-2BRZ meets industry standards.
7.What is the process for return or replacement of ADA4622-2BRZ?
All ADA4622-2BRZ units undergo pre-shipment inspection (PSI). If there is an issue with ADA4622-2BRZ, 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 ADA4622-2BRZ part is unused and in its original packaging.
Return procedure for ADA4622-2BRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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