My Inquiry
My Account
Analog Devices Inc. AD620ANZ
- Part No.:
- AD620ANZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AD620ANZ.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:482
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD620ANZ from Analog Devices is a low-cost, precision instrumentation amplifier designed for high-accuracy signal conditioning in sensor interfaces and medical electronics. It delivers gain of 1–10,000 set by a single external resistor, features 50 μV max input offset voltage, 0.6 μV/°C max offset drift, and 1.3 mA max supply current, and is widely used in ECG front-ends and weigh-scale transducer amplification.
For engineers reviewing the AD620ANZ datasheet, AD620ANZ pinout, AD620ANZ application, or AD620ANZ equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed application use cases, and two rigorously cross-checked alternative parts with documented functional differences.
Technical Context
The AD620ANZ implements a monolithic, three-op-amp-based instrumentation amplifier architecture with Superβeta bipolar input transistors enabling 1.0 nA max input bias current. Its gain is set by external RG between Pins 1 and 8, with internal 24.7 kΩ trimmed resistors yielding G = 1 + (49.4 kΩ/RG).
It achieves 120 kHz bandwidth at G = 100 and 15 μs settling time to 0.01% for 10 V steps, supported by internal compensation and optimized transconductance scaling with gain. Input-referred noise is 9 nV/√Hz at 1 kHz and 0.28 μV p-p (0.1 Hz–10 Hz), making it suitable for low-level DC-coupled measurements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1 to 10,000 - set by single external resistor RG; enables flexible signal scaling without redesigning amplifier topology. |
| Input Offset Voltage | 50 μV max - ensures ≤0.25% full-scale error when amplifying 20 mV bridge outputs at G = 100. |
| Supply Current | 1.3 mA max - supports battery-powered portable instrumentation with multi-day operation on AA cells. |
| Bandwidth (G = 100) | 120 kHz - sufficient for ECG waveform fidelity (up to ~100 Hz) and fast industrial transducer response. |
| Settling Time | 15 μs to 0.01% - enables accurate multiplexed data acquisition at ≥50 kSPS per channel. |
| CMRR (G = 100) | 110 dB min - rejects common-mode interference from 50/60 Hz mains in unshielded medical or industrial environments. |
| Input Bias Current | 1.0 nA max - minimizes voltage error across high-impedance sources like 1 MΩ ECG electrodes or piezoresistive sensors. |
Pinout & Package
AD620ANZ is supplied in an 8-lead plastic DIP (Dual In-line Package) with 0.3-inch body width and through-hole mounting. Pin spacing is 0.1 inch, compatible with standard PCB layouts and socketing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | RG (Gain Set) | External resistor connection points; open-circuit for G = 1; determines gain via G = 1 + (49.4 kΩ/RG). |
| 2 | −IN | Inverting input terminal; differential input node referenced to REF; accepts negative leg of bridge or sensor. |
| 3 | +IN | Non-inverting input terminal; differential input node referenced to REF; accepts positive leg of bridge or sensor. |
| 4 | −VS | Negative power supply rail; supports ±2.3 V to ±18 V operation; must be decoupled locally for noise immunity. |
| 5 | REF | Reference output/input node; sets output common-mode level; can be driven externally for level-shifting or buffered for precision DC coupling. |
| 6 | OUTPUT | Single-ended amplified output; swing limited to −VS + 1.2 V to +VS − 1.4 V (±15 V supply); drives 2 kΩ loads. |
| 7 | +VS | Positive power supply rail; supports ±2.3 V to ±18 V operation; requires local 0.1 μF ceramic bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor gain programming | Eliminates trimming potentiometers and matched resistor networks-reduces BOM count and layout area by >50% vs. discrete 3-op-amp IAs. |
| Superβeta input stage | Delivers 1.0 nA max input bias current-enables direct interface to high-Z sensors (e.g., pH electrodes, piezoelectric elements) without guard traces. |
| Low 0.1–10 Hz noise | 0.28 μV p-p RTI at G = 100-supports sub-microvolt DC measurement resolution in weigh scales and pressure transducers. |
| Wide supply range | Operates from ±2.3 V to ±18 V-allows use in both low-voltage portable systems (±3 V) and industrial ±15 V rails without level-shifting. |
| High CMRR tracking | 110 dB min at G = 100 with <10 ppm/°C gain drift-maintains accuracy across −40°C to +85°C industrial temperature range. |
Applications
| ECG Signal Conditioning | Weigh Scale Bridge Amplification |
|---|---|
|
Use Scenario: Amplifying microvolt-level differential signals from Ag/AgCl electrodes in battery-powered portable ECG monitors. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with DC-coupled gain of 100 and 0.03 Hz high-pass filtering. Use Value: 1.0 nA max input bias current prevents electrode polarization; 0.28 μV p-p 0.1–10 Hz noise preserves ST-segment fidelity. |
Use Scenario: Conditioning mV-level Wheatstone bridge outputs from load cells in industrial weighing platforms. IC Role / Device Role / Timing Role: Low-drift, low-noise gain block with REF pin tied to ADC reference for ratiometric accuracy. Use Value: 50 μV max input offset and 0.6 μV/°C drift limit temperature-induced error to <10 ppm over −10°C to +50°C ambient. |
| Pressure Transducer Interface | Battery-Powered Data Logger |
|
Use Scenario: Amplifying output of 3 kΩ silicon piezoresistive pressure sensors powered from 5 V single supply. IC Role / Device Role / Timing Role: Single-supply instrumentation amplifier with REF biased at mid-rail for rail-to-rail compatible output swing. Use Value: 1.3 mA max quiescent current enables >100-hour operation on two AA cells; 120 kHz bandwidth captures transient pressure events. |
Use Scenario: Multi-channel analog front-end in environmental sensor nodes logging temperature, humidity, and strain. IC Role / Device Role / Timing Role: Channel-isolated gain stage with programmable RG per sensor type; synchronized by microcontroller GPIO. Use Value: 15 μs settling time allows 50 kSPS sampling across 4 channels; SOIC/DIP package simplifies hand-soldered prototyping and rework. |
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 dual supply and has no REF pin. | Preferred for high-precision lab equipment where offset drift dominates; unsuitable for REF-driven ratiometric ADC interfacing. | Select AD8221ARMZ when absolute DC accuracy >0.001% is required and REF functionality is not needed. |
| AD8226ARZ | Wider input voltage range (−VS + 0.1 V to +VS − 0.1 V), lower supply current (0.3 mA), but higher noise (15 nV/√Hz) and reduced CMRR (100 dB at G = 100). | Better suited for wide-range industrial sensors (e.g., RTD bridges) and ultra-low-power IoT nodes where noise floor is less critical. | Select AD8226ARZ for battery life >1 year in wireless sensor nodes, accepting 3× higher voltage noise for 77% lower current draw. |
Compared with AD620ANZ, AD8221ARMZ improves DC precision but sacrifices REF flexibility and increases cost, while AD8226ARZ trades noise performance for extreme power efficiency-making AD620ANZ the optimal balance for general-purpose sensor signal conditioning requiring both accuracy and design simplicity.
Availability
AD620ANZ is available at Aetrix Electronics and suitable for ECG monitoring systems, industrial weigh scales, pressure transducer interfaces, and battery-powered data loggers requiring stable component supply across long production lifecycles.
Supply support for AD620ANZ 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 Wilmington, MA, with R&D and manufacturing facilities worldwide.
The AD620 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 sensor-level accuracy is critical.
FAQ
What is the maximum gain achievable with AD620ANZ?
The AD620ANZ 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 AD620ANZ maintains 0.70% max gain error and 12 kHz bandwidth at this setting, enabling high-resolution small-signal amplification without cascading stages.
Can AD620ANZ operate from a single 5 V supply?
Yes, AD620ANZ operates from split supplies (±2.3 V to ±18 V) or single supplies (4.6 V to 36 V total), provided the input common-mode and output swing ranges are respected. For 5 V single supply, tie −VS to ground, bias REF at 2.5 V, and ensure inputs stay within −0.1 V to +3.8 V (per datasheet Figure 19), making AD620ANZ viable in compact portable designs.
What is the purpose of the REF pin on AD620ANZ?
The REF pin on AD620ANZ sets the output common-mode voltage and serves as the reference for the differential input stage. It can be left open (defaulting to mid-supply), tied to ground, or driven externally-enabling level-shifting, ratiometric ADC interfacing, or active offset nulling. This flexibility makes AD620ANZ uniquely suited for precision systems where output alignment matters.
How does AD620ANZ compare to discrete three-op-amp instrumentation amplifiers?
AD620ANZ replaces discrete three-op-amp IAs with superior performance: 10× lower supply current (1.3 mA vs. 15 mA), 50% smaller PCB footprint, 0.15% gain error at G = 100 (vs. >1% typical), and guaranteed matching of internal resistors. Its monolithic construction eliminates inter-stage drift and parasitic coupling, delivering repeatable accuracy without manual trimming-verified in Analog Devices' Figure 2 and Table 4.
Is AD620ANZ RoHS compliant and lead-free?
Yes, AD620ANZ is RoHS compliant and lead-free. Per Analog Devices' official ordering guide (Rev. H, Page 20), the "N" suffix denotes PDIP packaging with lead-free finish and RoHS-compliant materials. The device meets JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for industrial temperature range (−40°C to +85°C).
AD620ANZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AD620ANZ FAQ
1.How can I place an order for AD620ANZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD620ANZ 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 AD620ANZ reliable?
The price and inventory of AD620ANZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD620ANZ is usually 5 days.
3.What payment methods are accepted for AD620ANZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD620ANZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD620ANZ?
AD620ANZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD620ANZ 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 AD620ANZ?
For technical support, including AD620ANZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD620ANZ requirements.
6.How does Aetrix verify that AD620ANZ is sourced from the original manufacturer or authorized distributors?
All AD620ANZ 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 AD620ANZ meets industry standards.
7.What is the process for return or replacement of AD620ANZ?
All AD620ANZ units undergo pre-shipment inspection (PSI). If there is an issue with AD620ANZ, 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 AD620ANZ part is unused and in its original packaging.
Return procedure for AD620ANZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD620ANZ Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
