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Analog Devices Inc. AD622ARZ-R7
- Part No.:
- AD622ARZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD622ARZ-R7.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,034
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Product details
Overview
AD622ARZ-R7 from Analog Devices is a low-cost, monolithic instrumentation amplifier in 8-lead SOIC_N package, delivering gain accuracy of 0.15% at G = 1, 125 µV max input offset voltage, and 800 kHz bandwidth at G = 10 - used for precision transducer signal conditioning in industrial process controls and thermocouple interfaces.
For engineers reviewing the AD622ARZ-R7 datasheet, AD622ARZ-R7 pinout, AD622ARZ-R7 application, or AD622ARZ-R7 equivalent, key selection criteria include gain-setting resistor dependency (RG), ±2.6 V to ±15 V dual-supply operation, RTI noise of 0.6 µV p-p (0.1 Hz–10 Hz, G = 10), CMRR up to 118 dB at G = 100, and SOIC_N thermal resistance of 155°C/W.
Technical Context
The AD622ARZ-R7 implements a modified three-op-amp architecture with laser-trimmed internal 25.25 kΩ gain resistors, enabling precise gain programming via a single external resistor RG between Pins 1 and 8. Its bipolar input stage (Q1/Q2) provides high linearity and matched temperature drift.
Gain is set by G = 1 + (50.5 kΩ / RG), supporting 2–1000× with standard 1% resistors; unity gain requires no external component. Input bias current remains ≤5 nA, and reference terminal (Pin 5) allows output offset injection within ±(VS − 1.6 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±2.6 V to ±15 V - supports wide industrial rail options without level-shifting. |
| Input Offset Voltage | 125 µV max - enables sub-millivolt-level DC measurement accuracy at unity gain. |
| CMRR | 118 dB max at G = 100 - rejects common-mode interference from noisy plant environments. |
| Bandwidth | 800 kHz at G = 10 - sufficient for 100+ Hz sensor signals with <10 µs settling to 0.1%. |
| Quiescent Current | 1.5 mA max - suitable for low-power data acquisition nodes with limited thermal budget. |
| RTI Noise | 0.6 µV p-p (0.1 Hz–10 Hz, G = 10) - preserves resolution in low-frequency thermocouple and strain gauge outputs. |
| Package | 8-lead SOIC_N (R-8) - RoHS-compliant, surface-mountable, 155°C/W θJA for board-level thermal management. |
Pinout & Package
AD622ARZ-R7 is housed in an 8-lead SOIC_N (R-8) package per JEDEC MS-012-AA, with 1.27 mm lead pitch, 5.00 mm × 4.00 mm body, and coplanarity ≤0.10 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 (RG) | External gain-setting resistor connection | RG value determines gain per G = 1 + (50.5 kΩ/RG); pins must be unconnected for G = 1. |
| 2 (–IN) | Inverting input | Differential input node; requires DC return path for 5 nA max input bias current. |
| 3 (+IN) | Non-inverting input | Differential input node; matched impedance critical for CMRR performance. |
| 4 (–VS) | Negative supply rail | Accepts −2.6 V to −15 V; supplies internal bipolar input stage and output buffer. |
| 5 (REF) | Reference input | Sets output zero point; accepts voltage from −VS + 1.6 V to +VS − 1.6 V. |
| 6 (OUTPUT) | Single-ended output | Delivers amplified difference signal; drives ≥2 kΩ load with ±13.8 V swing (±15 V supply). |
| 7 (+VS) | Positive supply rail | Accepts +2.6 V to +15 V; powers all internal amplifiers and trimming circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain operation | No external resistor required - simplifies BOM and layout for baseline differential amplification. |
| Laser-trimmed internal resistors | 25.25 kΩ absolute matching - ensures <0.5% gain error at G = 1000 without calibration. |
| Input protection | Withstands ±60 mA input current indefinitely - survives field wiring faults and hot-swap events. |
| RFI suppression compatibility | Supports RC filter networks on inputs (e.g., 4.02 kΩ + 1 nF) - reduces RF rectification-induced DC offset shift to <1.5 µV RTI. |
| Thermal stability | 1.0 µV/°C input offset drift - maintains calibration integrity across −40°C to +85°C operating range. |
Applications
| Transducer Interface | Low-Cost Thermocouple Amplifier |
|---|---|
|
Use Scenario: Amplifying mV-level differential output from load cells, pressure sensors, or RTDs in factory-floor equipment. IC Role / Device Role / Timing Role: Precision difference amplifier with programmable gain and high CMRR to reject ground-loop noise. Use Value: Enables direct interface to 24-bit ADCs with <10 ppm nonlinearity and 0.6 µV p-p low-frequency noise at G = 10. |
Use Scenario: Conditioning Type K/J thermocouple outputs in HVAC controllers and industrial ovens. IC Role / Device Role / Timing Role: Cold-junction-compensated signal conditioner with REF pin for offset nulling and linearization. Use Value: Delivers 125 µV max input offset and 1.0 µV/°C drift - reduces temperature measurement error to <0.3°C over full range. |
| Industrial Process Control | Low-Cost Data Acquisition |
|
Use Scenario: Isolating and scaling 4–20 mA loop signals in PLC analog input modules. IC Role / Device Role / Timing Role: High-PSR instrumentation amplifier converting current-to-voltage with minimal supply ripple coupling. Use Value: Achieves 120 dB PSR at DC and >95 dB up to 100 Hz - prevents control instability from shared power rails. |
Use Scenario: Front-end amplification in portable multimeters and benchtop DAQ systems. IC Role / Device Role / Timing Role: Low-power, single-supply-capable signal conditioner with 1.5 mA quiescent current. Use Value: Supports battery operation with 800 kHz bandwidth and 10 µs settling - captures transient events without aliasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8221ARMZ | Lower input offset (25 µV max), higher CMRR (130 dB at G = 100), but requires ±5 V min supply. | Better suited for high-accuracy medical sensors where offset drift dominates error budget. | Select AD8221ARMZ when gain accuracy <0.01% and CMRR >125 dB are mandatory; AD622ARZ-R7 remains optimal for cost-sensitive industrial use. |
| AD8226ARMZ | Wider input voltage range (±13.5 V at ±15 V supply), lower quiescent current (0.35 mA), but 10 µV/°C offset drift. | Ideal for battery-powered remote sensors needing rail-to-rail input and ultra-low power. | Choose AD8226ARMZ for extended battery life and large common-mode swings; AD622ARZ-R7 offers superior DC precision at lower unit cost. |
Compared with AD8221ARMZ and AD8226ARMZ, the AD622ARZ-R7 delivers the best balance of low cost, proven industrial reliability, and adequate DC performance (125 µV offset, 1.0 µV/°C drift) for non-critical measurement tasks - making it the preferred choice where BOM cost and supply-chain stability outweigh marginal spec improvements.
Availability
AD622ARZ-R7 is available at Aetrix Electronics and suitable for industrial process controls, transducer interfaces, and low-cost thermocouple amplifiers requiring stable component supply across multi-year production cycles.
Supply support for AD622ARZ-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, headquartered in Norwood, MA.
The AD622ARZ-R7 belongs to Analog Devices' legacy instrumentation amplifier product line, designed specifically for cost-sensitive industrial and test equipment requiring robust DC precision without complex calibration.
FAQ
What is the gain-setting mechanism for the AD622ARZ-R7?
The AD622ARZ-R7 uses a single external resistor RG connected between Pins 1 and 8 to set gain according to G = 1 + (50.5 kΩ / RG). For unity gain, RG is left open. Standard 1% resistors yield gains from 2 to 1000; e.g., 5.62 kΩ gives G ≈ 10. The AD622ARZ-R7's internal laser-trimmed 25.25 kΩ resistors ensure accuracy without calibration.
Does the AD622ARZ-R7 support single-supply operation?
The AD622ARZ-R7 is specified for dual-supply operation (±2.6 V to ±15 V) and does not support true single-supply use. Its input common-mode range extends to −VS + 1.9 V and +VS − 1.2 V, and output swing reaches −VS + 1.1 V and +VS − 1.2 V. For single-supply designs, level-shifting or rail-splitting circuitry is required to bias the AD622ARZ-R7 correctly.
How does the REF pin function in the AD622ARZ-R7?
The REF pin (Pin 5) of the AD622ARZ-R7 sets the output's zero-reference voltage. It accepts any DC voltage between −VS + 1.6 V and +VS − 1.6 V, allowing precise offset injection - essential for thermocouple cold-junction compensation or DAC-based system calibration. Parasitic resistance on this pin degrades CMRR, so low-impedance drive is recommended.
What is the maximum input differential voltage the AD622ARZ-R7 can withstand?
The AD622ARZ-R7 tolerates up to ±25 V differential input voltage under normal operating conditions. However, for gains >14, this rating may be reduced due to internal node limitations - consult the Input Protection section of the datasheet. Input current must be limited to ≤6 mA for sustained overvoltage events, typically using series resistors or BAV199 diodes.
Is the AD622ARZ-R7 pin-compatible with other AD62x-series amplifiers?
Yes, the AD622ARZ-R7 shares the same 8-lead SOIC_N (R-8) pinout and functional configuration as AD620, AD621, and AD623 variants - including identical RG, ±IN, ±VS, OUTPUT, and REF pin assignments. This enables drop-in replacement in existing layouts where gain range and supply requirements align, though electrical specs (e.g., offset, noise) differ across the family.
AD622ARZ-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:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1.2V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1 MHz
- Current - Input Bias:
- 2 nA
- Voltage - Input Offset:
- 60 µV
- Current - Supply:
- 900µA
- Current - Output / Channel:
- 18 mA
- Voltage - Supply Span (Min):
- 5.2 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD622ARZ-R7 FAQ
1.How can I place an order for AD622ARZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD622ARZ-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 AD622ARZ-R7 reliable?
The price and inventory of AD622ARZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD622ARZ-R7 is usually 5 days.
3.What payment methods are accepted for AD622ARZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD622ARZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD622ARZ-R7?
AD622ARZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD622ARZ-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 AD622ARZ-R7?
For technical support, including AD622ARZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD622ARZ-R7 requirements.
6.How does Aetrix verify that AD622ARZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD622ARZ-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 AD622ARZ-R7 meets industry standards.
7.What is the process for return or replacement of AD622ARZ-R7?
All AD622ARZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD622ARZ-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 AD622ARZ-R7 part is unused and in its original packaging.
Return procedure for AD622ARZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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