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Analog Devices Inc. ADA4622-1BRZ
- Part No.:
- ADA4622-1BRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADA4622-1BRZ.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,790
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Product details
Overview
ADA4622-1BRZ 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 ultra-low input current.
For engineers reviewing the ADA4622-1BRZ datasheet, ADA4622-1BRZ pinout, ADA4622-1BRZ application, or ADA4622-1BRZ equivalent, this page provides verified specifications, package-specific pin functions, real-world use cases, and validated alternative options - all aligned with Rev. F datasheet and official Analog Devices documentation.
Technical Context
The ADA4622-1BRZ employs an N-channel JFET input stage enabling ultra-low input bias current (±10 pA max) and high input impedance (>10¹³ Ω), critical for photodiode and high-output-impedance sensor front-ends. 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 designs.
It features integrated EMI rejection filters (90 dB at 1 GHz/2.4 GHz), 23 V/µs slew rate (low-to-high), and 7.2–8 MHz gain bandwidth across supply conditions (5 V to ±15 V). The device includes active shutdown (50–60 µA), making it suitable for power-sensitive instrumentation where idle current must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 8 MHz typical (±15 V); enables stable unity-gain operation up to ~7 MHz and closed-loop bandwidth >9 MHz at AV = 1 (5 V supply). |
| Input Bias Current | ±10 pA maximum at TA = 25°C; ensures minimal error in high-Z sensor nodes (e.g., photodiodes, pH electrodes). |
| Offset Voltage (B Grade) | ±0.35 mV max at 25°C; supports precision DC-coupled signal chains without trimming in industrial temperature range (−40°C to +125°C). |
| Slew Rate | 23 V/µs (low-to-high), −18 V/µs (high-to-low) at ±15 V; allows fast settling (<2 µs to 0.01%) for driving SAR ADC inputs. |
| EMI Rejection Ratio | 90 dB typical at 1 GHz and 2.4 GHz; suppresses RF interference from nearby wireless modules or switching regulators. |
| Supply Voltage Range | 5 V to 30 V (±2.5 V to ±15 V); supports wide industrial and automotive input rails while maintaining rail-to-rail output swing. |
| Shutdown Current | 50 µA typical (at 25°C); reduces system standby power in battery-operated or energy-conscious applications. |
Pinout & Package
ADA4622-1BRZ is packaged in an 8-lead MSOP (Mini Small Outline Package) with exposed pad. This thermally enhanced package improves power dissipation and stability in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output node; rail-to-rail capable, drives loads up to 20 mA with <1 V dropout. |
| 2 | −IN | Inverting input; high-impedance JFET node; accepts signals down to V− rail. |
| 3 | +IN | Noninverting input; identical high-impedance characteristics as −IN; no phase reversal up to V+. |
| 4 | V− | Negative supply terminal; input common-mode range includes this rail; supports single-supply operation when tied to ground. |
| 5 | NIC | Not Internally Connected; no internal bond wire; must be left floating or grounded per layout best practice. |
| 6 | DISABLE | Active-low shutdown control; pulls supply current to 50 µA when logic low; high-impedance when open or pulled high. |
| 7 | V+ | Positive supply terminal; accepts up to 36 V absolute max; powers internal bias and output stage. |
| 8 | EPAD | Exposed thermal pad; must be soldered to PCB ground plane or V+ for optimal thermal performance (θJA = 185°C/W, 2-layer JEDEC board). |
Key Features
| Feature | Design Value |
|---|---|
| JFET input stage | Enables ±10 pA input bias current and >10¹³ Ω input resistance - essential for photodiode and piezoelectric sensor interfacing. |
| Rail-to-rail output | Delivers full swing from V− to V+ (e.g., 0 V to 5 V), maximizing ADC dynamic range and eliminating level-shifting circuitry. |
| EMI filtering | 90 dB rejection at 1 GHz/2.4 GHz prevents corruption of precision analog signals near Wi-Fi/BT or SMPS noise sources. |
| Shutdown mode | Reduces quiescent current to 50 µA, enabling low-power sleep states in portable instrumentation and IoT edge sensors. |
| Extended temperature range | Specified from −40°C to +125°C - qualified for under-hood automotive, industrial PLC, and outdoor environmental monitoring. |
Applications
| Photodiode Transimpedance Amplifier | High-Voltage Sensor Interface |
|---|---|
Use Scenario: Converting weak photocurrent (pA–nA) from a reverse-biased photodiode into a stable voltage signal for optical sensing. IC Role / Device Role / Timing Role: Precision transimpedance amplifier with ultra-low input bias current and low 1/f noise to preserve signal integrity. Use Value: Enables sub-picoamp resolution without external guarding or T-network compensation, reducing component count and board area. |
Use Scenario: Conditioning high-impedance output from strain gauges, RTDs, or capacitive humidity sensors operating at ±15 V rails. IC Role / Device Role / Timing Role: Low-drift, rail-to-rail output buffer and gain stage for precision analog front-end (AFE) signal conditioning. Use Value: Maintains ±0.35 mV offset and ±1 µV/°C drift over temperature - eliminates recalibration in field-deployed equipment. |
| ADC Driver for SAR Converters | Single-Supply Precision Filter |
Use Scenario: Driving the switched-capacitor input of a 16-bit+ SAR ADC (e.g., AD7980) with fast settling and minimal distortion. IC Role / Device Role / Timing Role: High-slew-rate, low-THD+noise driver ensuring <2 µs 0.01% settling to support 1 MSPS sampling. Use Value: 0.00035% THD+N at 1 kHz and 23 V/µs slew rate prevent aperture uncertainty and code misalignment. |
Use Scenario: Implementing active low-pass or band-pass filters in battery-powered medical devices using 3.3 V or 5 V supplies. IC Role / Device Role / Timing Role: Unity-gain stable, low-noise op amp for 2nd-order Sallen-Key or MFB topologies. Use Value: 12.5 nV/√Hz voltage noise density and 8 MHz GBP enable clean filtering up to ~100 kHz without gain peaking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision JFET-input op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4610-1ARZ | Lower GBP (16.5 MHz), higher ISY (1.8 mA), no shutdown pin; same 8-lead SOIC package. | Better for wideband AC-coupled applications; unsuitable where ultra-low IB or shutdown is required. | Select ADA4610-1ARZ only if bandwidth >10 MHz is needed and supply current is not constrained. |
| OPA140AIDBVR | Lower IB (±0.5 pA typ), lower noise (11 nV/√Hz), but no shutdown; 5-lead SOT-23 package (no DISABLE pin). | Superior for femtoamp-level photodiode apps; lacks disable function and MSOP footprint compatibility. | Choose OPA140AIDBVR when ultimate input current performance is mandatory and board space favors SOT-23. |
Compared with ADA4622-1BRZ, ADA4610-1ARZ trades ultra-low input bias for higher speed and power, while OPA140AIDBVR offers lower bias current but omits shutdown and uses a different package - making ADA4622-1BRZ the balanced choice for low-power, rail-to-rail, shutdown-capable precision sensing.
Availability
ADA4622-1BRZ is available at Aetrix Electronics and suitable for photodiode transimpedance amplifiers, SAR ADC drivers, and single-supply precision filters requiring stable component supply, long-term manufacturability, and extended temperature qualification.
Supply support for ADA4622-1BRZ 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 technologies, serving industrial, automotive, communications, and healthcare markets.
The ADA4622 family was designed as a next-generation upgrade to the AD820/AD822 series - targeting precision, low-noise, single-supply sensor signal conditioning with improved EMI immunity and rail-to-rail output drive.
FAQ
What is the maximum supply voltage for ADA4622-1BRZ?
The ADA4622-1BRZ has an absolute maximum supply voltage rating of 36 V. It is fully specified for operation from 5 V to 30 V (±2.5 V to ±15 V), with electrical characteristics guaranteed across that range. Exceeding 36 V risks permanent damage per the Absolute Maximum Ratings table in Rev. F datasheet.
Does ADA4622-1BRZ support true rail-to-rail input?
No - ADA4622-1BRZ supports rail-to-rail *output*, but its input common-mode range extends only to the negative rail (V−) and up to ~1 V below V+. The datasheet specifies IVR = −15.2 V to +14 V at ±15 V supply, confirming input does not reach V+. This is typical for JFET-input op amps and must be considered in noninverting configurations near V+.
What is the function of Pin 6 (DISABLE) on ADA4622-1BRZ?
Pin 6 is the active-low shutdown control. When pulled logic low (≤0.8 V), ADA4622-1BRZ enters low-power mode with supply current reduced to 50 µA typical. When left open or pulled high (≥2.0 V), the amplifier operates normally. This pin is unique to the MSOP variant and is not present on the SOT-23 version.
Can ADA4622-1BRZ drive heavy capacitive loads?
ADA4622-1BRZ is unity-gain stable but exhibits increasing overshoot with load capacitance >100 pF. Figure 46–48 in the datasheet show small-signal overshoot rising above 10% at CL = 500 pF. For >100 pF loads, external isolation (e.g., series resistor) or feedback compensation is recommended to maintain stability and settling accuracy.
Is ADA4622-1BRZ pin-compatible with AD820ARZ?
No - ADA4622-1BRZ (MSOP-8) and AD820ARZ (SOIC-8) share functional pin equivalence (OUT, −IN, +IN, V−, V+) but differ in pin 6 (DISABLE vs. NC) and pin 5 (NIC vs. NC). Their pinouts are *not* interchangeable without PCB redesign. The ADA4622-1BRZ requires explicit handling of the DISABLE pin, unlike AD820ARZ.
ADA4622-1BRZ 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:
- 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
ADA4622-1BRZ FAQ
1.How can I place an order for ADA4622-1BRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4622-1BRZ 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 ADA4622-1BRZ reliable?
The price and inventory of ADA4622-1BRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4622-1BRZ is usually 5 days.
3.What payment methods are accepted for ADA4622-1BRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4622-1BRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4622-1BRZ?
ADA4622-1BRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4622-1BRZ 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 ADA4622-1BRZ?
For technical support, including ADA4622-1BRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4622-1BRZ requirements.
6.How does Aetrix verify that ADA4622-1BRZ is sourced from the original manufacturer or authorized distributors?
All ADA4622-1BRZ 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 ADA4622-1BRZ meets industry standards.
7.What is the process for return or replacement of ADA4622-1BRZ?
All ADA4622-1BRZ units undergo pre-shipment inspection (PSI). If there is an issue with ADA4622-1BRZ, 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 ADA4622-1BRZ part is unused and in its original packaging.
Return procedure for ADA4622-1BRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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