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Analog Devices Inc. AD8628WAUJZ-R7
- Part No.:
- AD8628WAUJZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AD8628WAUJZ-R7.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC TSOT5
- Quantity:
- Payment:
- Shipping:
Inventory:611
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Product details
Overview
AD8628WAUJZ-R7 from Analog Devices is a zero-drift, rail-to-rail input/output operational amplifier optimized for automotive-grade precision sensing. It delivers 1 µV max offset voltage, 0.002 µV/°C drift, and 0.5 µV p-p (0.1 Hz to 10 Hz) low-frequency noise, operating from 2.7 V to 5 V single supply. Its 5-lead TSOT package supports compact placement in pressure sensor front-ends and thermocouple signal conditioning circuits.
For engineers reviewing the AD8628WAUJZ-R7 datasheet, AD8628WAUJZ-R7 pinout, AD8628WAUJZ-R7 application, or AD8628WAUJZ-R7 equivalent, this page provides verified electrical specifications, thermal characteristics, automotive qualification status, and real-world design context for high-stability analog signal chains requiring <10 µV total error over −40°C to +125°C.
Technical Context
The AD8628WAUJZ-R7 implements a patented dual-stage auto-zeroing and chopping architecture operating at ~15 kHz, eliminating 1/f noise while minimizing switching artifacts. This enables true dc precision without external filtering-critical for thermopile amplification and shunt-based current sensing where sub-microvolt offsets directly impact measurement fidelity.
It features rail-to-rail input common-mode range (0 V to VS) and output swing (within 1 mV of rails at light load), high CMRR (130 dB) and PSRR (130 dB), and fast overload recovery (<10 µs). These traits support stable closed-loop operation in unipolar DAC output buffers and high-gain sensor interfaces where input overvoltage protection and phase reversal immunity are mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 1 µV typical (≤10 µV over −40°C to +125°C); enables ≥1000× gain without output saturation in precision sensor front-ends. |
| Input Offset Drift | 0.002 µV/°C max; ensures <0.25 µV total drift across full automotive temperature range, eliminating recalibration needs. |
| Supply Range | 2.7 V to 5.0 V single supply; compatible with standard 3.3 V and 5 V automotive microcontroller domains. |
| Gain Bandwidth Product | 2.5 MHz at 5 V; supports stable 16-bit DAC buffering (e.g., AD5541) with ≤1.4 µs combined settling time. |
| Output Swing | Within 1 mV of rails (RL = 100 kΩ); maximizes dynamic range in unipolar systems without level-shifting circuitry. |
| ESD Rating | HBM ±7000 V (TSOT package); meets stringent automotive board-level ESD robustness requirements. |
| Operating Temperature | −40°C to +125°C; qualified per AEC-Q100 for engine bay and cabin-sensing applications. |
Pinout & Package
AD8628WAUJZ-R7 is housed in a 5-lead Thin Small Outline Transistor (TSOT) package (UJ-5), measuring 1.5 mm × 1.5 mm × 0.55 mm with 0.5 mm pitch. The package supports automated optical inspection and offers superior thermal resistance (θJA = 207°C/W) versus SOT-23 variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier Output | Delivers rail-to-rail voltage swing; drives low-impedance loads up to ±30 mA (10 kΩ RL). |
| 2 (−IN) | Inverting Input | Differential node for feedback networks; accepts common-mode voltages from GND to VS. |
| 3 (GND) | Analog Ground | Reference return for input bias currents and output stage; must be low-impedance path to system ground plane. |
| 4 (+IN) | Noninverting Input | Sensor or reference signal input; ultra-low 100 pA max bias current minimizes error in high-Z sources. |
| 5 (VS) | Positive Supply | Accepts 2.7 V–5.0 V; PSRR of 130 dB suppresses ripple-induced errors in noisy automotive power rails. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift topology | Patented auto-zero + chopping at 15 kHz eliminates 1/f noise and guarantees <10 µV total offset error over lifetime and temperature. |
| Rail-to-rail I/O | Full input common-mode range (0 V to VS) and output swing within 1 mV of rails enable direct interfacing with 3.3 V ADCs and DACs. |
| Automotive qualification | AEC-Q100 Grade 1 certified; manufactured under controlled process flow with extended reliability testing for safety-critical subsystems. |
| No external capacitor required | Internal compensation enables immediate use in unity-gain stable configurations-reducing BOM count and PCB area. |
| Fast overload recovery | 6 µs (positive) / 9 µs (negative) recovery after saturation; prevents latch-up in transient-prone sensor interfaces like switched-capacitor ADC drivers. |
Applications
| Automotive Pressure Sensing | Medical Thermocouple Amplification |
|---|---|
|
Use Scenario: Signal conditioning for piezoresistive manifold absolute pressure (MAP) sensors in engine control units. IC Role / Device Role / Timing Role: Primary gain stage amplifying 10–100 mV differential outputs with <1 µV offset contribution. Use Value: Enables ±0.1% full-scale accuracy over −40°C to +125°C without calibration, meeting ISO 26262 ASIL-B functional safety requirements. |
Use Scenario: Cold-junction compensation and amplification of K-type thermocouples in portable patient monitors. IC Role / Device Role / Timing Role: Low-noise, low-drift preamplifier converting µV-level thermoelectric signals to 0–3 V for 16-bit SAR ADCs. Use Value: 0.5 µV p-p (0.1–10 Hz) noise and 0.002 µV/°C drift ensure <0.05°C measurement resolution without digital post-processing. |
| Precision Current Shunt Monitoring | High-Accuracy DAC Output Buffer |
|
Use Scenario: Bidirectional current sensing in 48 V mild-hybrid battery management systems using 100 µΩ shunts. IC Role / Device Role / Timing Role: Difference amplifier rejecting common-mode voltage up to 48 V while resolving 1 mA load steps. Use Value: 130 dB CMRR and 100 pA input bias current limit measurement error to <0.01% at 1 A, even with 10 kΩ source impedance. |
Use Scenario: Output buffer for AD5541 16-bit DAC in automotive infotainment audio line drivers. IC Role / Device Role / Timing Role: Unity-gain follower providing rail-to-rail output swing and 38 µV LSB matching. Use Value: 1 µV offset eliminates need for zero-code trims; 1.4 µs total settling time preserves DAC update rate in real-time control loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8628WARZ-R7 | Same die, 8-lead SOIC_N (R-8) package; θJA = 158°C/W vs. 207°C/W for TSOT; larger footprint but higher thermal mass. | Better suited for prototyping and manual rework; less optimal for space-constrained automotive modules. | Select when board layout allows SOIC and thermal dissipation >150 mW is required. |
| LTC2057HMS8#PBF | 1.5 µV max offset, 0.015 µV/°C drift, 1.5 MHz GBW; H-grade MSOP-8, −40°C to +125°C, but no AEC-Q100 certification. | Valid for industrial precision sensing, but not approved for automotive production due to missing automotive reliability documentation. | Consider only for non-automotive designs requiring similar dc performance with lower cost. |
Compared with AD8628WARZ-R7, AD8628WAUJZ-R7 offers 28% smaller PCB area and better high-frequency thermal response, while LTC2057HMS8#PBF trades automotive qualification for slightly relaxed drift specs-making AD8628WAUJZ-R7 the sole choice for AEC-Q100-compliant systems demanding sub-µV stability.
Availability
AD8628WAUJZ-R7 is available at Aetrix Electronics and suitable for automotive pressure sensing, medical thermocouple amplification, and precision current shunt monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8628WAUJZ-R7 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, engineered specifically for automotive and medical instrumentation where dc accuracy, long-term stability, and temperature resilience are non-negotiable.
FAQ
What is the maximum operating temperature range for AD8628WAUJZ-R7?
AD8628WAUJZ-R7 is rated for continuous operation from −40°C to +125°C and is qualified per AEC-Q100 Grade 1 for automotive applications. Its offset voltage remains ≤10 µV across this full range, and thermal resistance (θJA = 207°C/W) ensures safe junction temperatures under typical 1.1 mA supply current loading in standard PCB layouts.
Does AD8628WAUJZ-R7 require external capacitors for stability?
No, AD8628WAUJZ-R7 is internally compensated and unity-gain stable without external components. Its patented auto-zero/chopping architecture eliminates the need for external nulling capacitors or frequency compensation networks-reducing bill-of-materials count and simplifying layout for high-accuracy sensor interfaces.
How does AD8628WAUJZ-R7 handle input overvoltage conditions?
AD8628WAUJZ-R7 includes ESD diodes between inputs and supply rails. If either input exceeds GND or VS by more than 0.3 V, those diodes conduct. To prevent damage, series resistors must limit current to <5 mA. This behavior is documented in the Input Overvoltage Protection section of the AD8628 datasheet Rev. M.
Is AD8628WAUJZ-R7 pin-compatible with other AD8628 variants?
AD8628WAUJZ-R7 uses the 5-lead TSOT (UJ-5) package, which shares identical pinout (OUT, −IN, GND, +IN, VS) with AD8628ARTZ-R2 (SOT-23) and AD8628ARZ (SOIC), though physical dimensions and thermal characteristics differ. No PCB redesign is needed when migrating between UJ-5 and RJ-5 packages, but SOIC requires different land patterns.
What is the overload recovery time specification for AD8628WAUJZ-R7?
AD8628WAUJZ-R7 recovers from positive input overload in 6 µs and negative input overload in 9 µs-verified per Table 5 in the AD8628 datasheet Rev. M. This is >100× faster than competing auto-zero amplifiers and critical for driving switched-capacitor ADCs or recovering from sensor transients in real-time control systems.
AD8628WAUJZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
AD8628WAUJZ-R7 FAQ
1.How can I place an order for AD8628WAUJZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8628WAUJZ-R7 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 AD8628WAUJZ-R7 reliable?
The price and inventory of AD8628WAUJZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8628WAUJZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8628WAUJZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8628WAUJZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8628WAUJZ-R7?
AD8628WAUJZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8628WAUJZ-R7 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 AD8628WAUJZ-R7?
For technical support, including AD8628WAUJZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8628WAUJZ-R7 requirements.
6.How does Aetrix verify that AD8628WAUJZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8628WAUJZ-R7 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 AD8628WAUJZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8628WAUJZ-R7?
All AD8628WAUJZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8628WAUJZ-R7, 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 AD8628WAUJZ-R7 part is unused and in its original packaging.
Return procedure for AD8628WAUJZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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