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Analog Devices Inc. AD620ARZ-REEL
- Part No.:
- AD620ARZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD620ARZ-REEL.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,966
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Product details
Overview
AD620ARZ-REEL from Analog Devices is a low-cost, precision instrumentation amplifier optimized for DC-coupled sensor signal conditioning in battery-powered and portable systems. It delivers gain of 1–10,000 set by a single external resistor, 50 μV max input offset voltage, 0.6 μV/°C max offset drift, and 1.3 mA max supply current - enabling high-accuracy weigh scale and ECG front-end designs.
For engineers reviewing the AD620ARZ-REEL datasheet, AD620ARZ-REEL pinout, AD620ARZ-REEL application, or AD620ARZ-REEL equivalent, this page provides verified specifications, SOIC-8 package mapping, real-world medical and industrial use cases, and two validated alternative parts with documented functional trade-offs.
Technical Context
The AD620ARZ-REEL implements a monolithic three-op-amp architecture with Superβeta bipolar input transistors, enabling 1.0 nA max input bias current and 9 nV/√Hz input voltage noise at 1 kHz. Its laser-trimmed 24.7 kΩ internal gain resistors ensure accurate gain programming via RG (pins 1 and 8), with gain error as low as 0.10% at G = 100.
It features rail-to-rail output swing capability (±VS − 1.4 V, RL = 2 kΩ), 100 dB min CMRR at G = 10, and 15 μs settling time to 0.01% for 10 V steps - making it suitable for multiplexed data acquisition where fast channel switching and low drift are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1 to 10,000, set by single external resistor RG between pins 1 and 8 - simplifies design and reduces BOM count vs. discrete 3-op-amp IAs. |
| Input Offset Voltage | 50 μV max (B grade), enabling ≤0.25% full-scale error in 20 mV bridge applications without auto-zeroing. |
| Supply Current | 1.3 mA max at ±15 V - supports >100-hour operation on a 130 mAh coin cell in portable ECG recorders. |
| Bandwidth | 120 kHz at G = 100 - sufficient for 50/60 Hz ECG waveform capture and industrial pressure sensor outputs up to 10 kHz. |
| CMRR | 100 dB min at G = 100, DC–60 Hz with 1 kΩ source imbalance - rejects common-mode interference from mains-coupled transducers. |
| Settling Time | 15 μs to 0.01% for 10 V step - allows ≥66 kSPS sampling in multiplexed 16-bit DAQ systems without gain-dependent latency penalty. |
| Input Voltage Noise | 9 nV/√Hz @ 1 kHz and 0.28 μV p-p (0.1–10 Hz) - preserves SNR in low-frequency biopotential and strain gauge measurements. |
Pinout & Package
AD620ARZ-REEL is supplied in an 8-lead SOIC (R) package, 3.9 mm × 4.9 mm footprint, with standard JEDEC MS-012AC dimensions and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | RG terminals | Connect external gain-setting resistor; open-circuit for G = 1; determines transconductance and bandwidth scaling. |
| 2 | Inverting input (−IN) | Differential input node; accepts negative-side transducer signal; high impedance (10 GΩ || 2 pF). |
| 3 | Non-inverting input (+IN) | Differential input node; accepts positive-side transducer signal; matched to pin 2 for CMR optimization. |
| 4 | Negative supply (−VS) | Connects to ground or negative rail; supports dual-supply (±2.3 V to ±18 V) or single-supply operation with REF bias. |
| 5 | Reference (REF) | Output offset control node; sets DC level of single-ended output; driven externally for level-shifting or buffered for ratiometric ADC interfacing. |
| 6 | Output | Single-ended amplified output; drives 2 kΩ load to within 1.4 V of rails; short-circuit protected. |
| 7 | Positive supply (+VS) | Connects to positive rail; supplies internal amplifiers and bias circuitry; PSR >110 dB at G = 100. |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor gain programming | Eliminates need for matched resistor networks; enables field-adjustable gain with <0.3% error using 1% RG. |
| Superβeta input stage | Delivers 1.0 nA max input bias current - critical for high-Z sources like piezoresistive pressure sensors and dry-electrode ECG. |
| Low 0.1–10 Hz noise | 0.28 μV p-p RTI at G = 100 - avoids baseline wander in diagnostic-grade ECG and sub-Hz industrial monitoring. |
| Laser-trimmed internal resistors | 24.7 kΩ absolute value with <0.01% matching - ensures stable gain vs. temperature and supply across production lots. |
| Wide supply range | Operates from ±2.3 V to ±18 V - supports both 3.3 V single-supply portable systems and ±15 V industrial DAQ rails. |
Applications
| Weigh Scales | ECG Monitoring |
|---|---|
Use Scenario: Amplifying mV-level output from 350 Ω Wheatstone bridge load cells in industrial floor scales. IC Role / Device Role / Timing Role: Precision instrumentation amplifier with G = 100, referenced to ADC VREF for ratiometric accuracy. Use Value: 40 ppm nonlinearity and 0.6 μV/°C drift limit total error to <0.01% FS over −40°C to +85°C without calibration. |
Use Scenario: Front-end amplification of 1 mVpp biopotential signals from Ag/AgCl electrodes in portable ECG recorders. IC Role / Device Role / Timing Role: Low-noise, low-bias-current IA driving 12-bit SAR ADC with 1 kHz sampling. Use Value: 9 nV/√Hz noise and 1.0 nA bias current preserve dynamic range and minimize electrode polarization artifacts. |
| Transducer Interface | Battery-Powered DAQ |
Use Scenario: Conditioning output of 10 kΩ thin-film pressure sensors in HVAC differential pressure controllers. IC Role / Device Role / Timing Role: G = 100 IA with REF tied to mid-rail for single-supply 5 V operation. Use Value: 1.3 mA supply current enables >200 hours runtime on two AA alkaline cells while maintaining 100 dB CMRR. |
Use Scenario: Channel-isolated signal conditioning in handheld multichannel environmental sensor nodes. IC Role / Device Role / Timing Role: One AD620ARZ-REEL per analog channel, multiplexed into shared ADC with 15 μs settling. Use Value: Pin-compatible layout across channels reduces PCB complexity; SOIC-8 footprint fits high-density sensor modules. |
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 2.5 mA supply current. | Better for high-precision lab equipment; less suitable for ultra-low-power portable use. | Select AD8221ARMZ when offset and CMRR dominate over battery life; AD620ARZ-REEL remains optimal for cost-sensitive, long-life field instruments. |
| AD8226ARMZ | Wider input voltage range (to ±VS), lower power (0.8 mA), but higher noise (15 nV/√Hz) and 100 μV offset. | Preferred for wide-supply industrial sensors; trades noise performance for extended common-mode tolerance. | Choose AD8226ARMZ for ±24 V systems with large common-mode swings; retain AD620ARZ-REEL for low-noise, moderate-range medical and test gear. |
Compared with AD8221ARMZ and AD8226ARMZ, AD620ARZ-REEL offers the best balance of low noise, low offset, and ultra-low quiescent current in the SOIC-8 form factor - making it the default choice for portable, battery-constrained instrumentation where 0.28 μV p-p 0.1–10 Hz noise and 50 μV offset are acceptable.
Availability
AD620ARZ-REEL is available at Aetrix Electronics and suitable for weigh scales, ECG monitors, transducer interfaces, and battery-powered data acquisition systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AD620ARZ-REEL 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, headquartered in Norwood, MA, with design centers worldwide.
The AD620ARZ-REEL belongs to Analog Devices' precision instrumentation amplifier product line, engineered specifically for low-drift, low-noise DC signal conditioning in medical, industrial, and test equipment where size, power, and accuracy are co-constrained.
FAQ
What is the maximum gain achievable with AD620ARZ-REEL?
The AD620ARZ-REEL supports a gain range of 1 to 10,000, set by a single external resistor RG connected between pins 1 and 8. At G = 10,000, RG = 4.94 Ω (1% tolerance recommended). The gain equation is G = 1 + (49.4 kΩ / RG). Performance specifications such as bandwidth (12 kHz) and settling time (150 μs) are validated at this maximum gain.
Does AD620ARZ-REEL support single-supply operation?
Yes, AD620ARZ-REEL operates from ±2.3 V to ±18 V dual supplies or from a single 4.6 V to 36 V supply. For single-supply use, the REF pin must be biased to a stable midpoint voltage (e.g., VCC/2) to establish output headroom. Input common-mode range extends to within 1.9 V of either rail, enabling direct interface with grounded-sensor bridges.
What is the purpose of the REF pin on AD620ARZ-REEL?
The REF pin on AD620ARZ-REEL sets the DC output offset level. When left unconnected, output is referenced to ground. Driving REF with a voltage (e.g., ADC reference or mid-rail) shifts the entire output range accordingly - essential for ratiometric measurements and single-supply systems. Input impedance is 20 kΩ, and drive capability is ±50 μA.
How does AD620ARZ-REEL compare to discrete three-op-amp instrumentation amplifiers?
AD620ARZ-REEL replaces discrete three-op-amp IAs with superior performance: 10× lower supply current (1.3 mA vs. 15 mA), 40 ppm nonlinearity vs. 95 ppm, and 50 μV offset vs. 125 μV typical. Its monolithic construction ensures matched internal resistors and thermal tracking, eliminating manual trimming and reducing board area by >50%.
Is AD620ARZ-REEL suitable for ECG applications?
Yes, AD620ARZ-REEL is widely used in ECG front-ends due to its 1.0 nA max input bias current (critical for high-impedance dry electrodes), 0.28 μV p-p 0.1–10 Hz noise (minimizes baseline wander), and 15 μs settling time (supports multiplexed multi-lead acquisition). Its SOIC-8 package meets space constraints in portable recorders, and B-grade specs meet Class II medical device requirements.
AD620ARZ-REEL 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:
- 500 pA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 900µA
- Current - Output / Channel:
- 18 mA
- Voltage - Supply Span (Min):
- 4.6 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD620ARZ-REEL FAQ
1.How can I place an order for AD620ARZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD620ARZ-REEL 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 AD620ARZ-REEL reliable?
The price and inventory of AD620ARZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD620ARZ-REEL is usually 5 days.
3.What payment methods are accepted for AD620ARZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD620ARZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD620ARZ-REEL?
AD620ARZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD620ARZ-REEL 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 AD620ARZ-REEL?
For technical support, including AD620ARZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD620ARZ-REEL requirements.
6.How does Aetrix verify that AD620ARZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD620ARZ-REEL 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 AD620ARZ-REEL meets industry standards.
7.What is the process for return or replacement of AD620ARZ-REEL?
All AD620ARZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD620ARZ-REEL, 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 AD620ARZ-REEL part is unused and in its original packaging.
Return procedure for AD620ARZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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