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Analog Devices Inc. AD620SQ/883B
- Part No.:
- AD620SQ/883B
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
AD620SQ/883B.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,444
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Product details
Overview
AD620SQ/883B from Analog Devices is a military-grade, low-power instrumentation amplifier with 1–10,000 programmable gain via single external resistor RG, ±2.3 V to ±18 V supply range, 50 μV max input offset voltage, and 120 kHz bandwidth at G = 100 - deployed in precision transducer interfaces, ECG front-ends, and weigh-scale signal chains requiring high CMRR and low drift over −55°C to +125°C.
For engineers reviewing the AD620SQ/883B datasheet, AD620SQ/883B pinout, AD620SQ/883B application, or AD620SQ/883B equivalent, this page delivers verified specifications, military-qualified thermal and electrical performance, real-world settling behavior (15 μs to 0.01%), and validated alternatives for ruggedized analog signal conditioning.
Technical Context
The AD620SQ/883B implements a monolithic, three-op-amp-derived 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 gain-setting topology uses laser-trimmed 24.7 kΩ internal resistors and an external RG between Pins 1 and 8 to achieve G = 1 + 49.4 kΩ/RG.
It features a fully differential input stage with 10 GΩ||2 pF common-mode and differential impedance, reference terminal (Pin 5) supporting level-shifting, and output swing limited to −VS + 1.2 V to +VS − 1.4 V (RL = 2 kΩ, ±5 V to ±18 V). CMRR reaches 130 dB at G = 100 (DC–60 Hz, 1 kΩ source imbalance).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1 to 10,000 - set by single external resistor RG; enables scalable amplification without redesigning signal chain topology. |
| Input Offset Voltage | 50 μV max - ensures ≤25 ppm full-scale error in 20 mV bridge applications at room temperature. |
| Supply Current | 1.3 mA max - supports battery-powered portable instrumentation with minimal thermal load and PCB space. |
| Bandwidth (G = 100) | 120 kHz - sufficient for ECG (0.05–150 Hz), pressure sensor outputs, and industrial process control loop sampling. |
| Settling Time | 15 μs to 0.01% - enables accurate multiplexed data acquisition at ≥50 kSPS per channel with stable gain. |
| Operating Temp Range | −55°C to +125°C - qualified per MIL-STD-883, suitable for avionics, downhole tools, and defense electronics. |
| CMRR (G = 100) | 130 dB min - rejects >99.99% of 60 Hz common-mode interference from unshielded transducer cables. |
Pinout & Package
AD620SQ/883B is housed in an 8-lead CERDIP (Q) package with hermetic ceramic/metal construction rated for military temperature and reliability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | RG terminals | Connect external gain-setting resistor; open-circuit for G = 1; defines transconductance and bandwidth scaling. |
| 2 | Inverting Input (−IN) | Differential input node; accepts negative leg of bridge or sensor; high-impedance (10 GΩ||2 pF). |
| 3 | Noninverting Input (+IN) | Differential input node; accepts positive leg of bridge or sensor; matched to Pin 2 for CMR optimization. |
| 4 | Negative Supply (−VS) | Ground-referenced or negative rail connection; supports dual-supply operation down to ±2.3 V. |
| 5 | Reference (REF) | Output DC level shift point; sets output common-mode voltage; driven externally for level translation. |
| 6 | Output | Single-ended amplified output; rail-to-rail swing limited to −VS + 1.2 V / +VS − 1.4 V (RL = 2 kΩ). |
| 7 | Positive Supply (+VS) | Positive rail connection; supports wide supply range up to ±18 V; enables high dynamic range in industrial systems. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed gain resistors | 24.7 kΩ absolute value enables <0.3% gain error at G = 100 without calibration. |
| Superβeta input stage | 1.0 nA max input bias current allows use with high-Z sources (e.g., 1 MΩ ECG electrodes) without significant error. |
| Low 0.1–10 Hz noise | 0.28 μV p-p RTI at G = 100 - critical for DC-coupled medical and strain-gauge measurements. |
| MIL-STD-883 Class B screening | Qualified for −55°C to +125°C operation with burn-in, temperature cycling, and hermeticity testing. |
| RFI rejection enhancement | Integrated ESD diodes and optimized layout suppress RF rectification in noisy industrial environments. |
Applications
| ECG Front-End Amplifier | Weigh Scale Bridge Interface |
|---|---|
|
Use Scenario: Amplifying microvolt-level differential signals from Ag/AgCl electrodes in portable ECG recorders. IC Role / Device Role / Timing Role: Primary instrumentation amplifier providing G = 100, rejecting 60 Hz mains interference while preserving ST-segment fidelity. Use Value: 1.0 nA max input bias current prevents electrode polarization; 0.28 μV p-p 0.1–10 Hz noise ensures clean baseline for arrhythmia detection. |
Use Scenario: Conditioning mV-level output from 350 Ω Wheatstone bridges in industrial platform scales. IC Role / Device Role / Timing Role: Precision gain block converting 20 mV full-scale bridge output to ±10 V ADC input range. Use Value: 50 μV max input offset contributes <250 ppm error; 40 ppm nonlinearity maintains 16-bit effective resolution across temperature. |
| Pressure Transducer Signal Chain | Avionics Sensor Interface |
|
Use Scenario: Signal conditioning for 3 kΩ piezoresistive pressure sensors powered from 5 V single supply in UAV altimeters. IC Role / Device Role / Timing Role: Low-power (1.3 mA) in-amp with REF pin used to level-shift output into ADC's input range. Use Value: ±2.3 V minimum supply enables direct 5 V rail operation; 120 kHz bandwidth captures transient pressure events. |
Use Scenario: Ruggedized analog front-end for accelerometers and gyroscopes in flight control systems. IC Role / Device Role / Timing Role: MIL-qualified signal conditioner operating continuously at −55°C to +125°C in sealed avionics bays. Use Value: Hermetic CERDIP package and MIL-STD-883 qualification ensure long-term reliability under vibration, shock, and thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8221BRZ | Lower input offset (25 μV max), higher CMRR (130 dB at G = 100), but only −40°C to +85°C rating. | Commercial/industrial systems where extended temperature is not required; lower cost per unit volume. | Select AD8221BRZ when ambient operating range stays within commercial limits and tighter initial offset is prioritized. |
| AD8429ARZ | Ultra-low voltage noise (0.94 nV/√Hz), wider bandwidth (3.5 MHz at G = 100), but 2.5 mA supply current and no MIL qualification. | High-speed biomedical diagnostics (e.g., EEG) or precision test equipment needing sub-nV/√Hz performance. | Choose AD8429ARZ only when ultra-low noise outweighs power budget and military environmental compliance. |
Compared with AD8221BRZ and AD8429ARZ, the AD620SQ/883B uniquely balances military temperature range, hermetic packaging, sub-1.3 mA quiescent current, and proven field reliability - making it irreplaceable in aerospace, defense, and downhole applications where qualification trumps raw specs.
Availability
AD620SQ/883B is available at Aetrix Electronics and suitable for avionics sensor interfaces, downhole telemetry systems, and ruggedized medical diagnostic equipment requiring stable component supply across extended temperature and lifecycle constraints.
Supply support for AD620SQ/883B 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 precision instrumentation, industrial automation, and defense markets since 1965.
The AD620 product line was engineered for high-accuracy, low-power signal conditioning in resource-constrained environments - specifically targeting transducer interfaces, medical biosensors, and military-grade measurement systems.
FAQ
What is the maximum operating temperature for AD620SQ/883B?
The AD620SQ/883B is qualified per MIL-STD-883 and operates across −55°C to +125°C. This extended range is achieved through hermetic CERDIP packaging and rigorous screening - unlike commercial AD620 variants limited to −40°C to +85°C. The AD620SQ/883B maintains specified gain error, offset drift, and CMRR throughout this full military temperature envelope.
Does AD620SQ/883B require external components to set gain?
Yes, AD620SQ/883B requires a single external resistor RG connected between Pins 1 and 8 to set gain from 1 to 10,000 using G = 1 + 49.4 kΩ/RG. For G = 1, Pins 1 and 8 remain unconnected. The AD620SQ/883B datasheet specifies 0.1% tolerance and <10 ppm/°C TC for optimal accuracy - no capacitors or additional op amps are needed for basic operation.
How does the REF pin function in AD620SQ/883B?
The REF pin (Pin 5) of AD620SQ/883B sets the output common-mode voltage. When driven to a fixed DC voltage (e.g., 2.5 V), the output becomes VOUT = G × (V+IN − V−IN) + VREF. This enables level-shifting into single-supply ADCs or interfacing with downstream circuitry requiring specific input voltage ranges - a key feature for battery-powered and isolated sensor systems using the AD620SQ/883B.
Is AD620SQ/883B pin-compatible with other AD620 variants?
Yes, AD620SQ/883B shares identical 8-lead CERDIP pinout and electrical behavior with AD620ARZ (SOIC) and AD620AN (PDIP), including Pin 1/8 (RG), Pin 2 (−IN), Pin 3 (+IN), Pin 4 (−VS), Pin 5 (REF), Pin 6 (OUT), and Pin 7 (+VS). Mechanical footprint differs due to CERDIP vs. plastic packages, but PCB layout can reuse same pad pattern with minor land pattern adjustments for hermetic sealing.
What is the small-signal bandwidth of AD620SQ/883B at G = 1?
The AD620SQ/883B delivers 1 MHz small-signal −3 dB bandwidth at G = 1, as confirmed in the Rev. H datasheet (Table 2, Dynamic Response section). This bandwidth supports fast step response and high-frequency noise rejection in applications such as active filter preamplifiers and wideband sensor monitoring - while maintaining 1.3 mA supply current and 9 nV/√Hz input voltage noise.
AD620SQ/883B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-CERDIP
AD620SQ/883B FAQ
1.How can I place an order for AD620SQ/883B through Aetrix?
Please submit a Request for Quotation (RFQ) for AD620SQ/883B 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 AD620SQ/883B reliable?
The price and inventory of AD620SQ/883B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD620SQ/883B is usually 5 days.
3.What payment methods are accepted for AD620SQ/883B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD620SQ/883B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD620SQ/883B?
AD620SQ/883B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD620SQ/883B 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 AD620SQ/883B?
For technical support, including AD620SQ/883B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD620SQ/883B requirements.
6.How does Aetrix verify that AD620SQ/883B is sourced from the original manufacturer or authorized distributors?
All AD620SQ/883B 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 AD620SQ/883B meets industry standards.
7.What is the process for return or replacement of AD620SQ/883B?
All AD620SQ/883B units undergo pre-shipment inspection (PSI). If there is an issue with AD620SQ/883B, 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 AD620SQ/883B part is unused and in its original packaging.
Return procedure for AD620SQ/883B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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