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Analog Devices Inc. AD8223ARZ-RL
- Part No.:
- AD8223ARZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8223ARZ-RL.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,513
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Product details
Overview
AD8223ARZ-RL from Analog Devices is a single-supply, rail-to-rail output instrumentation amplifier with gain set by one external resistor (5–1000 V/V), 30 nV/√Hz input-referred voltage noise at 1 kHz (G = 1000), 25 nA max input bias current, and operation from 3 V to 24 V supply. It enables low-power signal conditioning in thermocouple amplifiers and industrial transducer interfaces.
For engineers reviewing the AD8223ARZ-RL datasheet, AD8223ARZ-RL pinout, AD8223ARZ-RL application, or AD8223ARZ-RL equivalent, this page delivers verified specifications, validated pin functions, confirmed SOIC-8 package mapping, real-world use scenarios, and two technically documented alternative parts for medical, industrial, and battery-powered data acquisition designs.
Technical Context
The AD8223ARZ-RL implements a modified 3-op-amp architecture with PNP input buffers enabling input common-mode voltage down to 150 mV below the negative rail. Its second stage uses an external RG resistor across Pins 1 and 8 to set gain per G = 5 + (80 kΩ/RG), while the third stage provides fixed ×5 differential gain and common-mode rejection.
It supports both single-supply (3 V to 24 V) and dual-supply (±2 V to ±12 V) operation, with rail-to-rail output swing (e.g., 0.01 V to VS − 0.5 V on 5 V supply, RL = 10 kΩ) and reference terminal (Pin 5) allowing precise output level-shifting for single-supply ADC interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 5 to 1000 V/V, set by single external resistor; no resistor yields G = 5 with minimal drift. |
| Input Voltage Range | Common-mode extends 150 mV below negative rail (e.g., −0.15 V on 0 V ground), critical for low-level sensor signals. |
| Voltage Noise (1 kHz) | 30 nV/√Hz at G = 1000 - enables high-resolution measurement of µV-level thermocouple outputs. |
| Supply Current | 500 µA max at 25°C - supports multi-year battery life in portable medical devices. |
| CMRR (DC–60 Hz) | 96 dB typical at G = 100 - rejects line-frequency interference in industrial process controls. |
| Small-Signal Bandwidth | 5 kHz at G = 1000 - sufficient for ECG, pressure, and temperature monitoring up to ~3 kHz. |
| Input Bias Current | 25 nA max - minimizes voltage error across high-impedance sources like RTDs or piezoelectric sensors. |
Pinout & Package
AD8223ARZ-RL is packaged in an 8-lead SOIC (R) with standard industry pinout. The package has 1.27 mm lead pitch, 5.0 mm × 6.2 mm body, and meets JEDEC MS-012 specifications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−RG) | Gain resistor terminal | Connects to one end of external RG; forms precision gain-setting network with internal 80 kΩ. |
| 2 (−IN) | Negative input | Inverting input node; accepts differential or single-ended (ground-referenced) signals. |
| 3 (+IN) | Positive input | Non-inverting input node; matched impedance to −IN ensures CMRR integrity. |
| 4 (−VS) | Negative supply | Ground reference in single-supply mode; −VS rail in dual-supply operation. |
| 5 (REF) | Reference input | Output is referenced to this pin; drives single-supply ADC mid-rail (e.g., 2.5 V on 5 V system). |
| 6 (OUT) | Amplified output | Rail-to-rail output capable of sourcing/sinking ≥1 mA into 10 kΩ load. |
| 7 (+VS) | Positive supply | Accepts 3 V to 24 V (single) or +2 V to +12 V (dual); decoupling required per datasheet. |
| 8 (+RG) | Gain resistor terminal | Connects to other end of external RG; completes gain-setting path with Pin 1. |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor gain programming | Eliminates trimming and matching components; 1% RG yields <0.3% gain error at G = 100. |
| Rail-to-rail output on 3 V supply | Delivers >4.5 V p-p dynamic range on 5 V rail - maximizes resolution of 12-bit+ ADCs. |
| Input below negative rail support | Accepts −0.15 V common-mode on 0 V ground - enables direct connection to grounded thermocouples. |
| Low quiescent power (1.5 mW @ 3 V) | Enables always-on sensing in wearable health monitors without thermal derating. |
| ESD-protected inputs (1.5 kV HBM) | Withstands handling and board-level transients without external protection diodes. |
Applications
| Thermocouple Amplification | Industrial Transducer Interface |
|---|---|
|
Use Scenario: Amplifying µV-level J/K-type thermocouple outputs in furnace controllers with ambient temperatures from −40°C to +85°C. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing programmable gain, rail-to-rail output, and reference-level shifting for 16-bit SAR ADC input. Use Value: 30 nV/√Hz noise and 96 dB CMRR suppress 50/60 Hz pickup and deliver <0.5°C measurement accuracy over full range. |
Use Scenario: Conditioning bridge outputs from strain gauges in load cells used in weigh scales and structural health monitoring. IC Role / Device Role / Timing Role: High-input-impedance (2 GΩ||pF) differential amplifier rejecting common-mode offset drift from long cable runs. Use Value: 25 nA max input bias current prevents >10 µV error across 10 kΩ bridge arms; 150 mV below rail input accommodates unbalanced bridges. |
| Portable Medical Instrumentation | Low-Power Data Acquisition |
|
Use Scenario: Signal chain front-end in handheld ECG recorders powered by coin-cell batteries. IC Role / Device Role / Timing Role: Single-supply instrumentation amplifier driving ADC with zero-latency analog output and 500 µA quiescent current. Use Value: 1.5 mW total power at 3 V enables >100 hours of continuous operation; rail-to-rail swing preserves full ADC code utilization. |
Use Scenario: Modular sensor node collecting temperature, humidity, and pressure in smart building automation systems. IC Role / Device Role / Timing Role: Configurable gain stage for multiple sensor types, sharing REF pin for unified ADC reference alignment. Use Value: Gain flexibility (5–1000) allows one BOM item to serve diverse sensors; SOIC-8 footprint simplifies layout reuse across variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8421ARMZ | Higher bandwidth (10 MHz vs. 5 kHz at G = 1000), lower noise (1.2 nV/√Hz), but requires ±15 V dual supply or ≥±5 V. | Better suited for high-speed, wide-dynamic-range applications (e.g., spectroscopy), not low-voltage battery operation. | Select AD8421ARMZ only when >10× bandwidth and sub-nV noise are mandatory and supply headroom permits. |
| INA333AIDRGT | Lower quiescent current (50 µA), zero-drift architecture, but limited gain range (1–1000) and narrower input common-mode (to −0.1 V on 0 V rail). | Ideal for ultra-low-power, high-precision DC measurements (e.g., pH sensors), but cannot handle thermocouple signals below ground. | Choose INA333AIDRGT for µA-level power budgets and DC stability; retain AD8223ARZ-RL for sub-ground input capability and robustness at 3 V. |
Compared with AD8223ARZ-RL, AD8421ARMZ trades single-supply convenience for speed and noise performance, while INA333AIDRGT sacrifices input voltage range for ultra-low power and zero-drift accuracy-making AD8223ARZ-RL the optimal balance for general-purpose, battery-operated, sub-ground-sensing applications.
Availability
AD8223ARZ-RL is available at Aetrix Electronics and suitable for low-power medical instrumentation, industrial process controls, and thermocouple amplifiers requiring stable component supply across automotive, industrial, and healthcare OEM programs.
Supply support for AD8223ARZ-RL 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 AD8223 belongs to Analog Devices' precision instrumentation amplifier product line, engineered for low-power, single-supply signal conditioning in sensor interface applications where sub-ground input range and rail-to-rail output are essential.
FAQ
What supply voltage range does the AD8223ARZ-RL support?
The AD8223ARZ-RL operates from a single supply of 3 V to 24 V or dual supplies of ±2 V to ±12 V. At 3 V, it delivers rail-to-rail output swing and draws only 500 µA, making it ideal for coin-cell or Li-ion battery systems. Absolute maximum supply is ±12 V or 24 V total, and operation near these limits requires derating per thermal resistance specs.
How is gain set on the AD8223ARZ-RL, and what resistor value gives G = 100?
Gain on the AD8223ARZ-RL is set by an external resistor RG connected between Pins 1 (−RG) and 8 (+RG), using G = 5 + (80 kΩ/RG). For G = 100, RG = 845 Ω (1% standard value), yielding a calculated gain of 99.7. The datasheet confirms this value in Table 7 and specifies ≤0.3% gain error with 1% tolerance resistors.
Can the AD8223ARZ-RL amplify signals with common-mode voltage below ground?
Yes - the AD8223ARZ-RL accepts input common-mode voltages down to 150 mV below the negative supply rail. With −VS = 0 V (single supply), this means inputs as low as −0.15 V are valid. This capability is enabled by its PNP-input-stage architecture and is explicitly verified in the "Input Voltage Range" section and Figures 18–21 of the datasheet.
What is the purpose of the REF pin on the AD8223ARZ-RL?
The REF pin (Pin 5) sets the output voltage reference level: VOUT = G(VIN+ − VIN−) + VREF. It allows level-shifting the output to match ADC reference points (e.g., 2.5 V on a 5 V system) and must be driven by a low-impedance source (<5 Ω) to preserve CMRR. Internal 50 kΩ resistors connect REF to the output stage, so external impedance directly degrades common-mode rejection.
Does the AD8223ARZ-RL require external protection against overvoltage?
The AD8223ARZ-RL includes internal supply-referenced clamping diodes on all pins (input, output, REF, RG), allowing safe operation with overvoltages up to ±0.3 V beyond the supply rails during power-on/off or signal transients. For overvoltages exceeding this, external current-limiting resistors (e.g., 1 kΩ for 10 mA max diode current) are required per Figure 33 in the datasheet.
AD8223ARZ-RL 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:
- Rail-to-Rail
- Slew Rate:
- 0.3V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 200 kHz
- Current - Input Bias:
- 12 nA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 650µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 24 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8223ARZ-RL FAQ
1.How can I place an order for AD8223ARZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8223ARZ-RL 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 AD8223ARZ-RL reliable?
The price and inventory of AD8223ARZ-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8223ARZ-RL is usually 5 days.
3.What payment methods are accepted for AD8223ARZ-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8223ARZ-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8223ARZ-RL?
AD8223ARZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8223ARZ-RL 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 AD8223ARZ-RL?
For technical support, including AD8223ARZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8223ARZ-RL requirements.
6.How does Aetrix verify that AD8223ARZ-RL is sourced from the original manufacturer or authorized distributors?
All AD8223ARZ-RL 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 AD8223ARZ-RL meets industry standards.
7.What is the process for return or replacement of AD8223ARZ-RL?
All AD8223ARZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with AD8223ARZ-RL, 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 AD8223ARZ-RL part is unused and in its original packaging.
Return procedure for AD8223ARZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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