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Analog Devices Inc. AD524ARZ-16
- Part No.:
- AD524ARZ-16
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD524ARZ-16.pdf
- Description:
- IC INST AMP 1 CIRCUIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,422
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Product details
Overview
AD524ARZ-16 from Analog Devices is a precision monolithic instrumentation amplifier designed for high-accuracy data acquisition in demanding environments. It delivers pin-programmable gains of 1, 10, 100, and 1000; input offset voltage ≤50 µV (C grade); CMRR ≥120 dB at G = 1000; and 0.3 µV p-p low-frequency noise (0.1 Hz to 10 Hz) - enabling high-resolution sensor signal conditioning in industrial test equipment.
For engineers reviewing the AD524ARZ-16 datasheet, AD524ARZ-16 pinout, AD524ARZ-16 application, or AD524ARZ-16 equivalent, key selection considerations include guaranteed input offset drift ≤0.5 µV/°C, gain bandwidth product of 25 MHz (G = 1), settling time of 15 µs to 0.01% for G = 1–100, internal compensation, and SOIC-16 packaging with full power-on/power-off input protection.
Technical Context
The AD524ARZ-16 implements a classic three-op-amp architecture with monolithically matched thin-film resistors for gain programming and auto-zero-capable offset nulling terminals. Its input stage uses bidirectional FET-based protection limiting input current to ≤3 mA across ±36 V differential fault conditions without external components.
Gain is set either by strapping pins to select internal 1/10/100/1000 presets or via an external resistor (RG) between Pins 3 and 16 per RG = 40 kΩ/(G − 1). Output stage features sense and reference terminals supporting remote sensing, output offset injection (±10 V), and voltage-to-current conversion - all while maintaining RTI-referred noise of 7 nV/√Hz at 1 kHz and 0.3 µV p-p (0.1–10 Hz) at G = 1000.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | Pin-selectable 1, 10, 100, 1000; externally programmable 1–1000 via single resistor - eliminates need for external gain-setting networks. |
| Input Offset Voltage | ≤50 µV max (C grade); enables <0.003% nonlinearity at G = 1 - critical for DC-coupled strain gauge and bridge sensor interfaces. |
| CMRR | ≥120 dB at G = 1000 (DC–60 Hz, 1 kΩ source imbalance) - ensures rejection of EMI and ground-loop interference in noisy plant-floor environments. |
| Low-Frequency Noise | 0.3 µV p-p (0.1 Hz–10 Hz, G = 1000) - supports sub-µV-level resolution in precision weigh scales and medical biosensors. |
| Slew Rate / Settling | 5 V/µs slew rate; 15 µs to 0.01% for 20 V step (G = 1–100) - suitable for multiplexed 16-bit ADC front-ends with >60 kSPS throughput. |
| Supply Range | ±6 V to ±18 V dual supply - accommodates legacy ±15 V systems and low-voltage industrial rails without level-shifting. |
| Operating Temp | −25°C to +85°C (C grade) - qualified for commercial/industrial control cabinets without forced cooling. |
Pinout & Package
AD524ARZ-16 is housed in a 16-lead wide-body SOIC (SOIC_W) package compliant with JEDEC MS-013AC, with 1.27 mm pitch and 10.3 mm body width. Pin 1 marked by notch or dot; thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | Gain Select Inputs (G1, G2) | Binary-coded inputs selecting internal gain: G1=G2=V– → G=1; G1=V+, G2=V– → G=10; etc. No pull-up/down required. |
| 2 | Inverting Input (−IN) | Differential input node; internally protected by bidirectional FET limiter - withstands ±36 V fault without damage or latch-up. |
| 3 | Noninverting Input (+IN) | Differential input node; matched impedance (1 GΩ || 10 pF) to Pin 2 - preserves CMRR under unbalanced source impedances. |
| 4 | V– Supply | Negative analog supply rail; must be decoupled locally with ≥1 µF ceramic capacitor to minimize PSRR degradation. |
| 5 | Reference Input (REF) | Output offset injection point; accepts ±10 V DC; requires ≤1 Ω source impedance to avoid CMR degradation beyond 86 dB. |
| 6 | Sense Input (SENSE) | Output amplifier feedback node; connects directly to load for remote sensing - eliminates I×R drop errors in long-cable applications. |
| 7 | Output (OUT) | Class-A buffered output; drives ±10 V into 2 kΩ; supports external current boosters via SENSE/OUT loop without performance penalty. |
| 8 | NC | No connect - internally unused; must remain floating per datasheet. |
| 9 | Offset Null (–IN NULL) | Input offset trim terminal; used with Pin 10 to null RTI offset - essential for zero-drift calibration in high-gain thermocouple amplifiers. |
| 10 | Offset Null (+IN NULL) | Input offset trim terminal; paired with Pin 9 - adjusts differential input stage bias to eliminate initial offset before gain switching. |
| 11 | Output Null (OUT NULL) | Output offset trim terminal; used with Pin 12 to null RTO offset - minimizes gain-dependent offset shifts in programmable-gain systems. |
| 12 | Output Null (OUT NULL) | Output offset trim terminal; paired with Pin 11 - corrects output-stage quiescent error independent of gain setting. |
| 13 | V+ Supply | Positive analog supply rail; shares same decoupling requirement as Pin 4 - critical for achieving specified PSRR >100 dB. |
| 14 | RG External Gain Resistor | Connects to Pin 3; sets gain per RG = 40 kΩ/(G − 1) - enables fine gain tuning (e.g., G = 200) with <0.5% drift contribution. |
| 15 | RG External Gain Resistor | Connects to Pin 16; completes external gain network - must use low-TC precision metal-film resistor for stability over temperature. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-programmable fixed gains | Hardware-selectable 1/10/100/1000 gains eliminate microcontroller GPIO overhead and firmware dependencies in embedded DAQ. |
| Input protection circuitry | Bidirectional FET limiter restricts input current to ≤3 mA during ±36 V faults - removes need for external TVS diodes or series resistors. |
| Separate input/output offset nulling | Dual nulling paths (Pins 9/10 and 11/12) enable independent correction of RTI and RTO errors - critical for maintaining accuracy across gain ranges. |
| Reference and sense terminals | REF/SENSE pins support floating-load operation, remote sensing, and precision current sourcing - extends functionality beyond basic amplification. |
| Internal compensation | Unity-gain stable without external capacitors - simplifies layout, reduces BOM count, and avoids phase-margin tuning in production. |
Applications
| Strain Gauge Signal Conditioning | Thermocouple Amplification |
|---|---|
|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from load cells in factory automation weighing systems. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing programmable gain (G = 100–1000), RTI noise ≤0.3 µV p-p, and CMRR ≥110 dB to reject 50/60 Hz line noise. Use Value: Enables 24-bit effective resolution without external filtering; input protection survives 36 V transients induced by nearby motor drives. |
Use Scenario: Cold-junction compensated thermocouple measurement in HVAC controllers operating from −25°C to +85°C. IC Role / Device Role / Timing Role: High-CMRR, low-drift amplifier (≤0.5 µV/°C input offset drift) with REF terminal for precise cold-junction voltage injection. Use Value: Eliminates separate DAC and op-amp stages; integrated offset nulling maintains <1°C accuracy over full temperature range. |
| Medical Biosensor Front-End | Programmable-Gain Data Acquisition |
|
Use Scenario: Low-noise amplification of ECG electrode signals in portable patient monitors with battery-powered ±12 V supplies. IC Role / Device Role / Timing Role: Instrumentation amplifier delivering 0.3 µV p-p (0.1–10 Hz) noise, 5 V/µs slew rate, and ±10 V output swing into 2 kΩ. Use Value: Supports >100 dB SNR at 1 kHz; internal protection prevents ESD damage during clinical handling without added components. |
Use Scenario: Channelized DAQ module with software-controlled gain switching via reed relays on G1/G2 pins. IC Role / Device Role / Timing Role: Hardware-programmable gain amplifier with <0.003% nonlinearity and 15 µs settling - synchronizes with 100 kSPS ADC sampling. Use Value: Reduces FPGA resource usage vs. digital gain scaling; on-resistance of relay switches is absorbed into gain error budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8429ARZ | Lower input bias current (±0.5 nA vs. ±15 nA), higher GBW (50 MHz), but no pin-programmable gains or offset null pins. | Better for ultra-low-bias photodiode or pH probe amps; lacks hardware gain selection and nulling needed for multi-range industrial sensors. | Select AD8429ARZ only when bias current dominates error budget and gain is fixed; AD524ARZ-16 preferred for programmable, calibrated systems. |
| INA128U | Lower cost, wider temp range (−40°C to +125°C), but higher offset drift (1 µV/°C), no sense/reference terminals, and no external RG option. | Suitable for automotive cabin sensors where cost and extended temp matter more than sub-µV drift or remote sensing. | Choose INA128U for cost-sensitive, fixed-gain automotive applications; AD524ARZ-16 remains optimal for lab-grade calibration and flexible gain architectures. |
Compared with AD8429ARZ and INA128U, AD524ARZ-16 uniquely combines pin-strappable gains, dual offset nulling, sense/reference terminals, and 0.3 µV p-p noise - making it the only choice for high-accuracy, field-calibratable industrial DAQ requiring hardware-configurable signal chains.
Availability
AD524ARZ-16 is available at Aetrix Electronics and suitable for industrial process control, test and measurement equipment, and medical diagnostic devices requiring stable component supply across extended product lifecycles.
Supply support for AD524ARZ-16 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 industrial, communications, and healthcare markets since 1965.
The AD524ARZ-16 belongs to Analog Devices' precision instrumentation amplifier product line, engineered specifically for DC-coupled, high-CMRR, low-drift signal conditioning in harsh electromagnetic and thermal environments.
FAQ
What gain options does the AD524ARZ-16 support without external components?
The AD524ARZ-16 supports four pin-programmable gains - 1, 10, 100, and 1000 - using only internal thin-film resistors. Gains are selected by strapping Pins G1 and G2 to V+ or V– supply rails; no external resistors, capacitors, or configuration ICs are required for these standard settings. This makes AD524ARZ-16 ideal for deterministic, firmware-free gain selection in safety-critical systems.
How does the AD524ARZ-16 handle input overvoltage conditions during power-on or power-off?
The AD524ARZ-16 incorporates a proprietary bidirectional FET input protection circuit that limits input current to ≤3 mA across ±36 V differential fault conditions - whether powered or unpowered. Unlike discrete resistor-diode clamps, this integrated solution adds no series resistance or noise penalty, preserving the 1 GΩ input impedance and 0.3 µV p-p low-frequency noise performance of AD524ARZ-16.
Can the AD524ARZ-16 be used with single-supply operation?
No - the AD524ARZ-16 requires dual ±6 V to ±18 V supplies per its absolute maximum ratings and internal architecture. It is not specified or characterized for single-supply use. Attempting single-supply operation violates the device's common-mode input range and output swing specifications, leading to saturation, increased distortion, and potential damage. For single-supply designs, consider the AD8420 or AD8226 families instead of AD524ARZ-16.
What is the purpose of the SENSE and REFERENCE terminals on the AD524ARZ-16?
The SENSE terminal provides remote feedback for the output amplifier, enabling Kelvin sensing to cancel lead resistance errors in high-current or long-cable applications. The REFERENCE terminal allows injecting a precise DC offset (±10 V) into the output, supporting floating loads and cold-junction compensation. Both terminals are integral to AD524ARZ-16's system-level functionality - they are not optional and must be properly terminated per the datasheet to maintain CMRR and accuracy.
Is the AD524ARZ-16 RoHS compliant and lead-free?
Yes - the AD524ARZ-16 is RoHS compliant and lead-free, as confirmed by Analog Devices' official product change notices and material declarations. The "RZ" suffix denotes RoHS-compliant, lead-free, wide-body SOIC packaging. All AD524ARZ-16 units supplied by Aetrix Electronics meet EU Directive 2011/65/EU and are compatible with lead-free reflow profiles (J-STD-020).
AD524ARZ-16 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 5V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- 1 MHz
- Current - Input Bias:
- 50 nA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 3.5mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 12 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -25°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
AD524ARZ-16 FAQ
1.How can I place an order for AD524ARZ-16 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD524ARZ-16 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 AD524ARZ-16 reliable?
The price and inventory of AD524ARZ-16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD524ARZ-16 is usually 5 days.
3.What payment methods are accepted for AD524ARZ-16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD524ARZ-16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD524ARZ-16?
AD524ARZ-16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD524ARZ-16 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 AD524ARZ-16?
For technical support, including AD524ARZ-16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD524ARZ-16 requirements.
6.How does Aetrix verify that AD524ARZ-16 is sourced from the original manufacturer or authorized distributors?
All AD524ARZ-16 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 AD524ARZ-16 meets industry standards.
7.What is the process for return or replacement of AD524ARZ-16?
All AD524ARZ-16 units undergo pre-shipment inspection (PSI). If there is an issue with AD524ARZ-16, 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 AD524ARZ-16 part is unused and in its original packaging.
Return procedure for AD524ARZ-16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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