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Analog Devices Inc. AD8538ARZ-REEL7
- Part No.:
- AD8538ARZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8538ARZ-REEL7.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,522
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Product details
Overview
AD8538ARZ-REEL7 from Analog Devices is a single-channel, auto-zero precision operational amplifier optimized for ultra-low offset voltage (13 µV max), near-zero drift (0.03 µV/°C), and low power consumption (180 µA typical supply current) in 2.7 V to 5.5 V single-supply operation. It delivers rail-to-rail output swing, high CMRR (115 dB min), and operates across −40°C to +125°C - ideal for battery-powered sensor interfaces and portable instrumentation.
For engineers reviewing the AD8538ARZ-REEL7 datasheet, AD8538ARZ-REEL7 pinout, AD8538ARZ-REEL7 application, or AD8538ARZ-REEL7 equivalent, this page provides verified package mapping (8-lead SOIC_N), confirmed electrical specs at 2.7 V and 5.0 V, validated automotive-grade temperature performance, and real-world design implications of its auto-zero architecture on DC accuracy and low-frequency noise.
Technical Context
The AD8538ARZ-REEL7 employs a chopper-stabilized auto-zero architecture that continuously corrects input offset voltage and drift in real time, enabling stable DC gain and sub-microvolt-level baseline accuracy over temperature and time. Its dual-stage correction loop suppresses 1/f noise while maintaining bandwidth up to 430 kHz GBP.
This amplifier supports true single-supply operation with input common-mode range extending to V– and output swing within 20 mV of rails under 10 kΩ load. It features no phase reversal, robust ESD protection (±2 kV HBM), and is qualified for extended industrial and automotive applications per AEC-Q100 stress testing requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 13 µV maximum - enables direct measurement of µV-level sensor outputs without calibration drift. |
| Offset Drift | 0.03 µV/°C - ensures <1 µV total drift over full −40°C to +125°C range, critical for unattended field instrumentation. |
| Supply Current | 180 µA typical - allows continuous operation for >1 year on a single CR2032 coin cell in low-duty-cycle systems. |
| CMRR | 115 dB minimum - rejects >10⁵:1 common-mode interference in noisy industrial sensor nodes. |
| Gain Bandwidth | 430 kHz - supports stable closed-loop gain ≥100 at DC–100 Hz for precision signal conditioning stages. |
| Input Bias Current | 25 pA typical - preserves high-impedance source integrity (e.g., pH electrodes, piezoresistive bridges). |
| Operating Temp | −40°C to +125°C - certified for under-hood automotive and industrial control environments. |
Pinout & Package
AD8538ARZ-REEL7 is housed in an 8-lead narrow-body SOIC (SOIC_N, package option R-8), 5.00 mm × 4.00 mm footprint, 1.27 mm lead pitch, with standard JEDEC MS-012-AA compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Output | Amplified, rail-to-rail output capable of sourcing/sinking ±25 mA; connects directly to ADC input or next-stage filter. |
| 2: –IN | Inverting Input | High-impedance node (25 pA bias); used for feedback configuration or differential sensing with matched trace routing. |
| 3: +IN | Non-inverting Input | High-impedance node (25 pA bias); accepts low-current sensor signals (e.g., thermocouple, RTD bridge) without loading. |
| 4: V– | Negative Supply | Ground reference for single-supply operation; must be low-impedance with local 0.1 µF ceramic decoupling. |
| 5: NC | No Connect | Internally unconnected; left floating - no PCB trace or via required. |
| 6: NC | No Connect | Internally unconnected; left floating - no PCB trace or via required. |
| 7: V+ | Positive Supply | 2.7 V to 5.5 V input; requires local 0.1 µF ceramic + 1 µF tantalum decoupling for stability at full temperature range. |
| 8: NC | No Connect | Internally unconnected; left floating - no PCB trace or via required. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-zero architecture | Eliminates long-term drift and 1/f noise, delivering stable DC accuracy without external trimming or recalibration. |
| Rail-to-rail output | Swings within 20 mV of V+ and V– at 10 kΩ load, maximizing dynamic range for 12-bit+ ADC interfacing. |
| Low input bias current | 25 pA typical enables use with high-Z sources (e.g., glass pH electrodes, photodiode transimpedance inputs) without signal loss. |
| Single-supply operation | Operates from 2.7 V to 5.5 V with input common-mode range including V–, simplifying power architecture in portable designs. |
| Extended temperature grade | Specified from −40°C to +125°C with guaranteed parameters - suitable for engine control units and industrial PLC analog I/O modules. |
Applications
| Electronic Scales | Sensor Interfaces |
|---|---|
Use Scenario: High-resolution weight measurement using micro-strain gauge bridges in handheld or benchtop scales. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end, providing gain and offset correction before 24-bit sigma-delta ADC. Use Value: 13 µV offset and 0.03 µV/°C drift ensure ≤0.01% full-scale error over temperature without zero-point recalibration. |
Use Scenario: Signal conditioning for thermistor, RTD, or thermocouple sensors in HVAC and environmental monitoring. IC Role / Device Role / Timing Role: Low-drift, low-power buffer and amplifier in analog front-end (AFE) chains feeding microcontroller ADCs. Use Value: 25 pA input bias avoids self-heating errors in high-resistance RTDs; 180 µA supply current extends battery life in wireless sensor nodes. |
| Portable Instrumentation | Temperature Measurement |
Use Scenario: Handheld multimeters and data loggers requiring stable DC gain and minimal warm-up drift. IC Role / Device Role / Timing Role: Core op amp in autoranging voltage/current measurement paths and reference buffer circuits. Use Value: Auto-zero correction maintains calibration integrity over hours of continuous operation, eliminating manual nulling steps. |
Use Scenario: Precision cold-junction compensation and linearization in industrial thermocouple measurement systems. IC Role / Device Role / Timing Role: Low-noise, low-drift amplifier for thermistor biasing and differential voltage amplification. Use Value: 2.0 µVp-p (0.1–10 Hz) noise floor resolves <0.001°C temperature changes in high-resolution digital thermometers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8628ARZ-REEL7 | Lower offset (1 µV max), higher supply current (1.1 mA), same SOIC-8 package. | Better DC accuracy but unsuitable for ultra-low-power battery operation due to 6× higher ISY. | Select when absolute offset minimization outweighs power budget constraints. |
| LTC2050CS8#TRPBF | Similar offset (5 µV max), lower drift (0.015 µV/°C), higher cost, same SOIC-8 footprint. | Superior drift performance and rail-to-rail input, but not qualified for automotive temperature range. | Select for highest stability in lab-grade instrumentation where automotive qualification is unnecessary. |
Compared with AD8538ARZ-REEL7, AD8628ARZ-REEL7 trades 6× higher quiescent current for 13× lower offset, while LTC2050CS8#TRPBF offers better drift and input range at higher cost and without extended temperature certification - making AD8538ARZ-REEL7 optimal for cost-sensitive, battery-powered automotive and industrial sensor nodes requiring balanced precision and efficiency.
Availability
AD8538ARZ-REEL7 is available at Aetrix Electronics and suitable for electronic scales, portable instrumentation, and temperature measurement systems requiring stable component supply across automotive and industrial lifecycles.
Supply support for AD8538ARZ-REEL7 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 Wilmington, MA.
The AD8538 belongs to Analog Devices' precision auto-zero op amp product line, engineered specifically for applications demanding nanovolt-level DC accuracy, ultra-low drift, and robust operation in harsh thermal environments.
FAQ
What is the maximum supply voltage for AD8538ARZ-REEL7?
The AD8538ARZ-REEL7 has an absolute maximum supply voltage rating of +6 V. Its recommended operating range is 2.7 V to 5.5 V for single-supply use. Exceeding 6 V risks permanent damage per the Absolute Maximum Ratings table in the datasheet. Operation at 5.5 V is fully characterized and supported across the full −40°C to +125°C temperature range.
Does AD8538ARZ-REEL7 support rail-to-rail input?
No, AD8538ARZ-REEL7 does not support rail-to-rail input. Its input common-mode voltage range extends to V– but only to (V+) − 1.2 V at 25°C - for example, up to 3.8 V when V+ = 5.0 V. This limitation is documented in the "Input Voltage Range" specification (0 V to 5 V at VS = 5.0 V). The device does provide rail-to-rail output swing, however.
Is AD8538ARZ-REEL7 qualified for automotive applications?
The AD8538ARZ-REEL7 is not the automotive-qualified variant; it is the industrial-grade version. Automotive qualification applies only to the AD8538W-series parts (e.g., AD8538WAUJZ-REEL7), which undergo additional AEC-Q100 stress testing and have controlled manufacturing flow. AD8538ARZ-REEL7 is rated for −40°C to +125°C operation but lacks formal automotive reliability reporting.
What is the typical slew rate of AD8538ARZ-REEL7?
The typical slew rate of AD8538ARZ-REEL7 is 0.4 V/µs at VS = 5.0 V and RL = 10 kΩ, as specified in Table 1 of the datasheet. At 2.7 V supply, the typical slew rate reduces to 0.35 V/µs. This value reflects the device's ability to respond to fast step inputs while maintaining stability with capacitive loads up to 300 pF.
Can AD8538ARZ-REEL7 drive a 10 kΩ load across the full temperature range?
Yes, AD8538ARZ-REEL7 is fully specified to drive a 10 kΩ load across −40°C to +125°C. Output voltage swing is guaranteed to be ≥4.94 V (VOH) and ≤30 mV (VOL) at 5.0 V supply, and ≥2.66 V and ≤25 mV at 2.7 V supply - all under 10 kΩ load conditions per Tables 1 and 2. No external boost circuitry is required.
AD8538ARZ-REEL7 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:
- Zero-Drift
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.4V/µs
- Gain Bandwidth Product:
- 430 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 pA
- Voltage - Input Offset:
- 5 µV
- Current - Supply:
- 150µA
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8538ARZ-REEL7 FAQ
1.How can I place an order for AD8538ARZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8538ARZ-REEL7 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 AD8538ARZ-REEL7 reliable?
The price and inventory of AD8538ARZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8538ARZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8538ARZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8538ARZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8538ARZ-REEL7?
AD8538ARZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8538ARZ-REEL7 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 AD8538ARZ-REEL7?
For technical support, including AD8538ARZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8538ARZ-REEL7 requirements.
6.How does Aetrix verify that AD8538ARZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8538ARZ-REEL7 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 AD8538ARZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8538ARZ-REEL7?
All AD8538ARZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8538ARZ-REEL7, 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 AD8538ARZ-REEL7 part is unused and in its original packaging.
Return procedure for AD8538ARZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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