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Analog Devices Inc. AD8479TRZ-EP
- Part No.:
- AD8479TRZ-EP
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8479TRZ-EP.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,817
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Product details
Overview
AD8479TRZ-EP from Analog Devices is a precision difference amplifier engineered for high common-mode voltage measurement, featuring ±600 V dc input common-mode range, fixed gain of 1, rail-to-rail output, 130 kHz small-signal bandwidth, and operation across −55°C to +125°C. It enables accurate differential sensing in avionics power monitoring and motor control current feedback without galvanic isolation.
For engineers reviewing the AD8479TRZ-EP datasheet, AD8479TRZ-EP pinout, AD8479TRZ-EP application, or AD8479TRZ-EP equivalent, key selection criteria include verified ±600 V common-mode tolerance, 80 dB minimum CMRR at full VCM, 10 ppm max gain nonlinearity, 15 µV/°C max offset drift, and SOIC_N (R-8) package compatibility with military-grade thermal and reliability requirements.
Technical Context
The AD8479TRZ-EP implements a laser-trimmed thin-film resistor network to achieve precise unity gain and high CMRR over ±600 V common-mode range. Its input stage withstands transients up to ±900 V for 10 seconds and maintains stable operation with capacitive loads up to 500 pF.
It delivers 9.3 V/µs slew rate and 100 kHz full-power bandwidth at 20 V p-p output, with supply current tightly specified from 550 µA (typ) to 850 µA (max) across temperature. The device uses dual-supply operation from ±2.5 V to ±18 V and supports reference inputs at REF(+) and REF(−) for level-shifting flexibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 1 V/V - eliminates gain calibration in current-sense shunt applications. |
| Common-Mode Range | ±600 V dc - supports direct measurement on high-voltage bus rails without external attenuation. |
| CMRR | 80 dB min at ±600 V VCM - ensures <1 mV error from common-mode interference in noisy power systems. |
| Offset Drift | 15 µV/°C max - limits total offset shift to <2.55 mV over −55°C to +125°C operating range. |
| Bandwidth | 130 kHz −3 dB - captures fast current transients in motor phase-leg or inverter switching waveforms. |
| Supply Current | 550 µA typical - enables low-power, always-on monitoring in battery-backed or energy-constrained systems. |
| Operating Temp | −55°C to +125°C - qualified per AQEC standard for sustained operation in aerospace and defense environments. |
Pinout & Package
AD8479TRZ-EP is housed in an 8-lead SOIC_N (narrow-body) package compliant with JEDEC MS-012-AA, designated R-8, with 1.27 mm lead pitch and exposed pad not present. Thermal resistance θJA = 122°C/W under JEDEC 2S2P conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: REF(−) | Negative reference input | Accepts user-defined reference potential; sets output common-mode level when used differentially with REF(+). |
| 2: −IN | Inverting input | High-impedance node (500 kΩ common-mode, 2 MΩ differential) for shunt voltage connection. |
| 3: +IN | Noninverting input | Matches −IN impedance; forms differential pair with −IN for true difference amplification. |
| 4: −VS | Negative supply rail | Must be connected to system negative supply; powers internal amplifier core and bias circuitry. |
| 5: REF(+) | Positive reference input | Paired with REF(−); enables output level translation independent of supply rails. |
| 6: OUTPUT | Differential output | Rail-to-rail swing (−VS + 0.3 V to +VS − 0.3 V) drives 2 kΩ load or ADC input directly. |
| 7: +VS | Positive supply rail | Must be connected to system positive supply; supplies internal op-amp stages and output buffer. |
| 8: NC | No connect | Internally unconnected; must remain floating-no trace or component attachment permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed resistor network | Ensures 0.02% max gain error and 10 ppm max nonlinearity without external calibration. |
| Transient-protected inputs | Withstands ±900 V common-mode/differential transients for 10 sec-meets MIL-STD-704 surge immunity baseline. |
| Reference-input flexibility | REF(+) and REF(−) allow output offset adjustment from −VS to +VS, enabling single-supply ADC interfacing. |
| Enhanced product qualification | Manufactured at single fab/test site with controlled baseline and AQEC-compliant screening for defense/aerospace use. |
| Stable capacitive drive | Guaranteed stability with ≥500 pF load-eliminates need for external isolation resistors driving long traces or ADC inputs. |
Applications
| Avionics Power Monitoring | Unmanned System Motor Control |
|---|---|
Use Scenario: Real-time DC bus current measurement in fly-by-wire actuator power modules operating at ±270 V nominal. IC Role / Device Role / Timing Role: Precision difference amplifier converting shunt voltage to ground-referenced analog signal for flight controller ADC. Use Value: ±600 V common-mode range allows direct connection to high-side shunt without isolation transformers or attenuators, reducing BOM cost and board area by >30%. | Use Scenario: Phase-current sensing in compact ESCs for VTOL drones with 48–96 V battery stacks and PWM switching up to 40 kHz. IC Role / Device Role / Timing Role: High-bandwidth, low-drift current sense amplifier feeding FOC algorithm in real time. Use Value: 130 kHz bandwidth and 9.3 V/µs slew rate capture fast current edges during dead-time transitions, improving torque ripple control accuracy. |
| Industrial Motor Drives | High-Voltage Isolation Replacement |
Use Scenario: Three-phase inverter leg current feedback in servo drives rated for 690 V AC mains input and 1200 V DC bus. IC Role / Device Role / Timing Role: Unity-gain differential amplifier isolating shunt signals from noisy gate-drive domains. Use Value: 80 dB CMRR maintained at full ±600 V VCM suppresses common-mode noise from IGBT switching, reducing current measurement RMS error to <0.15%. | Use Scenario: Replacing optocoupled or transformer-based isolation amplifiers in battery management systems for EV traction packs (800 V nominal). IC Role / Device Role / Timing Role: Non-isolated but high-common-mode-tolerance signal conditioner for cell-string voltage and current monitoring. Use Value: Eliminates isolation barrier while retaining ±600 V working voltage margin-reducing latency by 2.5× and power consumption by 65% vs. isolated alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision high-common-mode difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA149QPWRQ1 | Fixed gain of 1, ±270 V VCM, 100 dB CMRR at 25°C, automotive AEC-Q100 qualified | Rated for automotive under-hood use only; not qualified for −55°C or AQEC compliance | Select for automotive production where extended temperature is not required and ISO 26262 functional safety support is needed. |
| AD8475ARMZ | Configurable gain (0.4 or 2), ±20 V VCM, integrated level-shifting, 10 MHz bandwidth | Designed for ADC interface-not for high-VCM industrial sensing; requires external attenuation above ±20 V | Select when interfacing with low-voltage SAR ADCs and system-level attenuation is already implemented. |
Compared with INA149QPWRQ1 and AD8475ARMZ, the AD8479TRZ-EP uniquely combines military-grade temperature range, AQEC qualification, and ±600 V VCM tolerance-making it the only option for space-constrained, high-reliability avionics and defense current sensing where isolation is unnecessary but extreme environmental robustness is mandatory.
Availability
AD8479TRZ-EP is available at Aetrix Electronics and suitable for avionics power monitoring, unmanned system motor control, and industrial motor drives requiring stable component supply, long-term obsolescence management, and defense-grade traceability.
Supply support for AD8479TRZ-EP 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 AD8479-EP belongs to Analog Devices' Enhanced Product line-designed specifically for defense, aerospace, and high-reliability industrial applications requiring extended temperature operation, controlled manufacturing baselines, and AQEC-compliant qualification.
FAQ
What is the maximum continuous common-mode voltage rating for AD8479TRZ-EP?
The AD8479TRZ-EP supports a continuous common-mode voltage range of ±600 V dc, as confirmed in the Absolute Maximum Ratings table and validated across temperature in the specifications. This rating applies to both differential and common-mode input configurations and is guaranteed over the full −55°C to +125°C operating range. Transient overvoltage tolerance extends to ±900 V for durations up to 10 seconds.
Does AD8479TRZ-EP require external gain-setting resistors?
No, the AD8479TRZ-EP has a fixed, laser-trimmed gain of exactly 1 V/V. No external resistors are needed or supported-the internal thin-film resistor network is factory-calibrated to deliver ≤0.02% gain error and ≤10 ppm nonlinearity. Adding external components would disrupt the precision matching and invalidate the published CMRR and drift specifications.
Can AD8479TRZ-EP operate from a single supply?
No, the AD8479TRZ-EP requires dual supplies ranging from ±2.5 V to ±18 V. Its architecture relies on symmetrical positive and negative rails to support rail-to-rail output swing and maintain input stage bias integrity across the full ±600 V common-mode range. Single-supply operation is not supported and would violate absolute maximum ratings for REF(−) and REF(+).
What is the purpose of the NC pin (Pin 8) on AD8479TRZ-EP?
Pin 8 is designated NC (No Connect) and is internally unconnected. Per the official datasheet, it must remain electrically floating-no trace, solder joint, or component may be attached. Connecting Pin 8 risks internal damage or unpredictable performance due to parasitic coupling or ESD path disruption. The SOIC_N footprint accommodates this pin mechanically but assigns no electrical function.
How does the AD8479TRZ-EP differ from commercial-grade AD8479?
The AD8479TRZ-EP is the enhanced product variant of the AD8479, qualified to AQEC standards for defense and aerospace use. It features a controlled manufacturing baseline, single fabrication and test site, military temperature range (−55°C to +125°C), full qualification data on request, and product change notification. The commercial AD8479 operates only from −40°C to +85°C and lacks AQEC screening or extended reliability documentation.
AD8479TRZ-EP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 9V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 130 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 550µA
- Current - Output / Channel:
- 55 mA
- Voltage - Supply Span (Min):
- -
- Voltage - Supply Span (Max):
- -
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8479TRZ-EP FAQ
1.How can I place an order for AD8479TRZ-EP through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8479TRZ-EP 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 AD8479TRZ-EP reliable?
The price and inventory of AD8479TRZ-EP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8479TRZ-EP is usually 5 days.
3.What payment methods are accepted for AD8479TRZ-EP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8479TRZ-EP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8479TRZ-EP?
AD8479TRZ-EP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8479TRZ-EP 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 AD8479TRZ-EP?
For technical support, including AD8479TRZ-EP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8479TRZ-EP requirements.
6.How does Aetrix verify that AD8479TRZ-EP is sourced from the original manufacturer or authorized distributors?
All AD8479TRZ-EP 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 AD8479TRZ-EP meets industry standards.
7.What is the process for return or replacement of AD8479TRZ-EP?
All AD8479TRZ-EP units undergo pre-shipment inspection (PSI). If there is an issue with AD8479TRZ-EP, 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 AD8479TRZ-EP part is unused and in its original packaging.
Return procedure for AD8479TRZ-EP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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