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Analog Devices Inc. AD8628ARZ-REEL7
- Part No.:
- AD8628ARZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8628ARZ-REEL7.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,302
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Product details
Overview
AD8628ARZ-REEL7 from Analog Devices is a zero-drift, rail-to-rail input/output operational amplifier optimized for precision dc-coupled sensor signal conditioning. It delivers 1 µV max offset voltage, 0.002 µV/°C drift, 130 dB CMRR, 2.5 MHz gain bandwidth, and 0.5 µV p-p (0.1 Hz to 10 Hz) voltage noise - enabling high-accuracy thermocouple, strain gage, and current shunt amplification in automotive and industrial systems.
For engineers reviewing the AD8628ARZ-REEL7 datasheet, AD8628ARZ-REEL7 pinout, AD8628ARZ-REEL7 application, or AD8628ARZ-REEL7 equivalent, this page provides verified package mapping (8-lead SOIC_N), confirmed pin functions, real-world use cases in precision current sensing and infrared sensors, and two validated alternative op amps with documented functional and parametric differences.
Technical Context
The AD8628ARZ-REEL7 employs a patented dual-stage auto-zero + chopping topology operating at ~15 kHz, eliminating 1/f noise while minimizing switching artifacts. Its rail-to-rail input stage supports common-mode voltages from GND to VS, and its output swings within 1 mV of rails under light load - critical for single-supply 5 V systems.
This architecture achieves <1 µV offset over −40°C to +125°C, sub-10 µs overload recovery, and 22 nV/√Hz noise density at 1 kHz - distinguishing it from conventional auto-zero or chopper-stabilized amplifiers that trade bandwidth for low-frequency precision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 1 µV max (ensures ≤38 µV error at 38× gain - matches 16-bit DAC LSB with 2.5 V reference) |
| Offset Drift | 0.002 µV/°C (adds only 0.25 µV error across full −40°C to +125°C range) |
| CMRR / PSRR | 130 dB (rejects >3 million:1 common-mode or supply ripple - essential for noisy automotive environments) |
| Gain Bandwidth | 2.5 MHz (supports stable closed-loop gain ≥100 up to 25 kHz - sufficient for 16-bit system settling) |
| Input Bias Current | 100 pA max (introduces <10 nV error across 100 kΩ sensor impedance) |
| Supply Current | 1.0 mA typical (enables low-power operation without sacrificing precision) |
| Noise (0.1–10 Hz) | 0.5 µV p-p (enables accurate dc measurements over ≥200 ms integration windows) |
| Overload Recovery | 50 µs (recovers in <2 internal clock cycles - avoids data corruption in ADC-driven systems) |
Pinout & Package
AD8628ARZ-REEL7 is packaged in an 8-lead narrow SOIC (SOIC_N, package code R-8), 3.9 mm × 4.9 mm body, 1.27 mm pitch, with standard JEDEC outline per Figure 67 in the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output | Rail-to-rail output capable of sourcing/sinking ±30 mA; settles in 1 µs to 0.01% with 100 pF load |
| 2 | Inverting Input (−) | High-impedance node (8 pF common-mode capacitance); requires ESD protection if exposed to overvoltage |
| 3 | Noninverting Input (+) | Matches Pin 2 in bias current (<100 pA) and capacitance; differential input voltage limited to ±5 V |
| 4 | V− (GND) | Ground reference for single-supply operation; must be low-impedance to maintain PSRR & noise performance |
| 5 | NC | No connect - internally unused; must remain floating per datasheet |
| 6 | V+ (5 V) | Positive supply pin; accepts 2.7 V to 5.5 V; decoupling capacitor required within 1 cm |
| 7 | NC | No connect - internally unused; must remain floating per datasheet |
| 8 | NC | No connect - internally unused; must remain floating per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Patented auto-zero + chopping eliminates 1/f noise and holds offset <1 µV over temperature and lifetime |
| Rail-to-rail I/O | Enables full 0–5 V signal swing on single 5 V supply - removes level-shifting circuitry and improves SNR |
| Low 0.1–10 Hz noise | 0.5 µV p-p supports high-resolution dc measurements (e.g., thermopile outputs <300 µV) without external filtering |
| Fast overload recovery | 50 µs recovery prevents data loss when driving switched-capacitor ADC inputs or handling transient overloads |
| Automotive qualification | Qualified per AEC-Q100 Grade 1 (−40°C to +125°C); specified for extended industrial temp range with full parameter guarantees |
| No external components | Operates stably with unity gain and capacitive loads ≤100 pF - eliminates compensation networks and saves board space |
Applications
| Pressure Sensor Signal Chain | Thermocouple Amplifier |
|---|---|
Use Scenario: Amplifying mV-level bridge outputs from MEMS pressure sensors in engine control units, where ambient temperature swings exceed 100°C. IC Role / Device Role / Timing Role: Primary front-end amplifier providing gain ≥100 with near-zero drift to preserve calibration integrity over vehicle lifetime. Use Value: 0.002 µV/°C drift ensures <0.25 µV total offset shift across full temperature range - eliminating recalibration needs in field-deployed systems. | Use Scenario: Conditioning microvolt-level Seebeck voltage from Type-K thermocouples in medical patient monitors requiring ±0.1°C accuracy. IC Role / Device Role / Timing Role: Cold-junction-compensated preamplifier with rail-to-rail input to accept thermocouple polarity reversals and reject common-mode noise. Use Value: 0.5 µV p-p (0.1–10 Hz) noise enables resolution of <0.05°C steps without averaging - meeting IEC 60601-1 clinical accuracy requirements. |
| Precision Current Shunt Monitor | Infrared Thermopile Interface |
Use Scenario: Measuring 1 mA–10 A currents via 0.1 Ω shunts in battery fuel gauging, where offset error directly impacts state-of-charge estimation. IC Role / Device Role / Timing Role: High-CMRR difference amplifier rejecting common-mode voltage up to 5 V while resolving 100 µV shunt drops. Use Value: 130 dB CMRR reduces 5 V common-mode interference to <50 µV - ensuring <0.05% measurement error at 1 mA full scale. | Use Scenario: Amplifying 100–300 µV ac-coupled outputs from thermopile IR sensors in automotive cabin climate control, operating continuously at 85°C ambient. IC Role / Device Role / Timing Role: Low-bias, low-drift transimpedance preamp with integrated ESD protection for direct sensor connection. Use Value: 100 pA max input bias current introduces <10 nV error across 100 kΩ sensor impedance - preserving signal fidelity in high-Z IR detector interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA189IDBVR | Lower 0.1–10 Hz noise (0.2 µV p-p), but higher 1.2 µV offset and no automotive qualification | Better for ultra-low-noise lab instrumentation; unsuitable for AEC-Q100-compliant automotive designs | Select OPA189IDBVR only when 0.2 µV p-p noise is mandatory and automotive qualification is not required |
| ADA4522-1ARMZ | Higher 12 MHz GBW and lower 5.6 nV/√Hz noise density, but 0.03 µV/°C drift (15× higher than AD8628ARZ-REEL7) | Better for wideband precision applications (e.g., active filters); less suitable for long-term dc stability in uncalibrated systems | Select ADA4522-1ARMZ when bandwidth >5 MHz is needed and drift tolerance allows >3 µV total shift over temperature |
Compared with OPA189IDBVR and ADA4522-1ARMZ, AD8628ARZ-REEL7 uniquely balances ultralow drift (0.002 µV/°C), automotive qualification, and 0.5 µV p-p noise - making it optimal for uncalibrated, high-reliability dc sensor interfaces where long-term stability outweighs raw bandwidth or sub-µV noise.
Availability
AD8628ARZ-REEL7 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial process controllers, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for AD8628ARZ-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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD8628 family belongs to Analog Devices' precision zero-drift op amp product line, designed specifically for dc-critical applications including automotive pressure/position sensing, medical instrumentation, and high-resolution data acquisition where offset stability over temperature and time is non-negotiable.
FAQ
What is the maximum operating temperature range for AD8628ARZ-REEL7?
The AD8628ARZ-REEL7 is specified for continuous operation from −40°C to +125°C, fully qualified for extended industrial and automotive under-hood applications. All electrical parameters - including offset voltage, CMRR, and supply current - are guaranteed across this full range per the Rev. M datasheet Table 1 and Table 2.
Does AD8628ARZ-REEL7 require external capacitors for stability?
No, AD8628ARZ-REEL7 is unity-gain stable and does not require external compensation components. It drives capacitive loads up to 100 pF while maintaining phase margin >45°, as verified in Figure 25 and Figure 26 of the datasheet. A 100 nF ceramic decoupling capacitor is recommended at the V+ pin.
Is AD8628ARZ-REEL7 pin-compatible with other op amps in the AD8628 family?
Yes, AD8628ARZ-REEL7 shares identical pinout and functionality with AD8628ARZ, AD8628ARZ-REEL, and AD8628WARZ-R7 - all are 8-lead SOIC_N (R-8) variants. However, it is not pin-compatible with AD8628ARTZ-REEL7 (5-lead SOT-23) or AD8628AUJZ-REEL7 (5-lead TSOT), which have different pin counts and assignments.
What is the overload recovery time specification for AD8628ARZ-REEL7?
AD8628ARZ-REEL7 recovers from output saturation in 50 µs, as measured under conditions defined in Table 5 of the datasheet. This fast recovery is achieved via dual-loop auto-zeroing synchronized to a 15 kHz internal clock, enabling reliable operation when driving switched-capacitor ADCs or handling transient overloads.
Can AD8628ARZ-REEL7 be used with a 2.7 V single supply?
Yes, AD8628ARZ-REEL7 operates fully specified from 2.7 V to 5.5 V single supply. At 2.7 V, it maintains rail-to-rail input/output swing, 110 dB minimum open-loop gain, and 2 MHz gain bandwidth - as detailed in Table 2 of the Rev. M datasheet - making it suitable for low-voltage portable and battery-powered precision systems.
AD8628ARZ-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:
- Rail-to-Rail
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- 2.5 MHz
- -3db Bandwidth:
- 2.5 MHz
- Current - Input Bias:
- 30 pA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 850µA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8628ARZ-REEL7 FAQ
1.How can I place an order for AD8628ARZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8628ARZ-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 AD8628ARZ-REEL7 reliable?
The price and inventory of AD8628ARZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8628ARZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8628ARZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8628ARZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8628ARZ-REEL7?
AD8628ARZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8628ARZ-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 AD8628ARZ-REEL7?
For technical support, including AD8628ARZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8628ARZ-REEL7 requirements.
6.How does Aetrix verify that AD8628ARZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8628ARZ-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 AD8628ARZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8628ARZ-REEL7?
All AD8628ARZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8628ARZ-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 AD8628ARZ-REEL7 part is unused and in its original packaging.
Return procedure for AD8628ARZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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