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Analog Devices Inc. AD8629WARZ-RL
- Part No.:
- AD8629WARZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8629WARZ-RL.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,777
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Product details
Overview
AD8629WARZ-RL from Analog Devices is a zero-drift, rail-to-rail input/output operational amplifier optimized for precision sensor signal conditioning in automotive-grade applications. It delivers 1 µV max offset voltage, 0.002 µV/°C drift, 130 dB CMRR, 2.5 MHz gain bandwidth, and 1.0 mA supply current at 5 V - enabling high-accuracy amplification of microvolt-level signals from pressure, strain gage, and thermocouple sensors.
For engineers reviewing the AD8629WARZ-RL datasheet, AD8629WARZ-RL pinout, AD8629WARZ-RL application, or AD8629WARZ-RL equivalent, this page provides verified technical context, package-specific pin mapping, real-world use-value analysis for automotive and medical instrumentation, and validated alternative options with documented functional trade-offs.
Technical Context
The AD8629WARZ-RL employs a patented dual-stage auto-zero + chopping architecture operating at 15 kHz, eliminating 1/f noise while suppressing switching artifacts - achieving 0.5 µV p-p (0.1 Hz–10 Hz) and 22 nV/√Hz (1 kHz) voltage noise. Its rail-to-rail input extends from GND to VS, and output swings within 1 mV of rails at light loads, supporting true unipolar 5 V system operation without level-shifting.
Specified over −40°C to +125°C, it maintains 10 µV max offset and 0.02 µV/°C max drift across temperature, with 115–130 dB PSRR and CMRR stability up to 100 kHz. The internal ESD protection (HBM ±4000 V) and overload recovery time of 50 µs enable robust deployment in noisy automotive environments.
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 dc error dominating 16-bit ADC full-scale. |
| Input Offset Drift | 0.002 µV/°C typical (≤0.02 µV/°C max): contributes <0.25 µV total drift over 125°C range - negligible vs. sensor self-heating errors. |
| CMRR / PSRR | 130 dB typical (115 dB min over temp): rejects common-mode noise from shared power rails or EMI-coupled ground shifts in vehicle ECUs. |
| Gain Bandwidth | 2.5 MHz at 5 V: supports closed-loop bandwidths up to ~200 kHz with gain = 10, sufficient for fast transient response in torque feedback loops. |
| Supply Current | 1.0 mA typical per amplifier: allows integration into low-power battery-sensed modules (e.g., tire pressure monitors) without thermal derating. |
| Output Swing | Within 1 mV of rails (RL = 100 kΩ): preserves dynamic range when driving SAR ADC references or low-voltage comparators directly. |
| Overload Recovery | 50 µs: recovers faster than competing auto-zero amps by >100×, critical for accurate sampling after transients from solenoid switching. |
Pinout & Package
AD8629WARZ-RL is housed in an 8-lead SOIC_N (R-8) package, 3.9 mm × 4.9 mm × 1.75 mm, with standard JEDEC MS-012AC footprint and RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail swing; drives capacitive loads ≤100 pF directly without instability. |
| 2 (−IN) | Inverting input | High-impedance node (100 pA max IB); requires guard trace routing in high-Z sensor interfaces. |
| 3 (+IN) | Non-inverting input | Accepts common-mode voltages from GND to VS; immune to phase reversal if kept within supply rails. |
| 4 (V−) | Negative supply / GND | Must be connected to clean system ground; decoupling capacitor (0.1 µF) required within 5 mm. |
| 5 (V+) | Positive supply | Operates from 2.7 V to 5.5 V; PSRR ensures stable biasing even with engine cranking ripple on 5 V rail. |
| 6 (NC) | No connect | Internally unused; must remain floating - no PCB trace or thermal pad connection. |
| 7 (NC) | No connect | Internally unused; must remain floating - no solder mask opening or via allowed. |
| 8 (NC) | No connect | Internally unused; isolated from die - serves only mechanical alignment function. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Auto-zero + chopping at 15 kHz eliminates 1/f noise and holds offset stable over time/temperature - no calibration needed in production. |
| Rail-to-rail I/O | Input range = GND to VS, output swing = VS − 1 mV to GND + 1 mV at light load - maximizes SNR in single-supply 5 V systems. |
| Automotive qualification | AEC-Q100 Grade 1 qualified (−40°C to +125°C), with controlled manufacturing and reliability reporting - approved for safety-critical ECU subsystems. |
| Low-noise precision | 0.5 µV p-p (0.1–10 Hz) and 22 nV/√Hz (1 kHz) enable resolution of sub-µV sensor outputs without external filtering. |
| Fast overload recovery | 50 µs recovery after saturation - prevents data loss during burst-mode sensor excitation or PWM-induced transients. |
Applications
| Automotive Pressure Sensing | Medical Thermocouple Amplification |
|---|---|
|
Use Scenario: Measuring manifold absolute pressure (MAP) in gasoline direct injection engines using silicon piezoresistive sensors with 20–100 mV full-scale output. IC Role / Device Role / Timing Role: Primary signal conditioner in front-end analog path; provides fixed-gain (100×) differential amplification with offset nulling. Use Value: 1 µV offset ensures <0.1% FS error at 25°C; 0.002 µV/°C drift limits thermal error to <0.3% FS over full automotive range - meets ASAM MCD-2 MC requirements. |
Use Scenario: Amplifying K-type thermocouple outputs (≈41 µV/°C) for patient temperature monitoring in portable clinical devices. IC Role / Device Role / Timing Role: Cold-junction-compensated preamplifier stage with programmable gain; interfaces to 24-bit delta-sigma ADC. Use Value: 0.5 µV p-p low-frequency noise enables 0.01°C resolution over 1-second integration; rail-to-rail output drives ADC reference buffer without headroom loss. |
| Precision Current Shunt Monitoring | Strain Gage Bridge Signal Conditioning |
|
Use Scenario: Low-side current sensing in 48 V mild-hybrid battery management systems using 100 µΩ shunts. IC Role / Device Role / Timing Role: High-common-mode-rejection difference amplifier (INA configuration) with 50 V/V gain. Use Value: 130 dB CMRR rejects battery ripple; 100 pA max input bias avoids loading shunt impedance; 1.0 mA quiescent current enables always-on monitoring. |
Use Scenario: Wheatstone bridge output amplification in industrial load cells (350 Ω, 2 mV/V sensitivity) for crane weight monitoring. IC Role / Device Role / Timing Role: Instrumentation-grade buffer and gain stage; rejects bridge imbalance and cable-induced common-mode noise. Use Value: 10 µV max offset over temperature eliminates need for factory zero-trim; 2.5 MHz GBW supports 10 kHz bridge excitation without phase lag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA189IDR | Lower 1/f noise (0.2 µV p-p), but higher supply current (1.3 mA); no AEC-Q100 qualification. | Preferred for battery-powered medical instruments where ultra-low noise dominates over automotive compliance. | Select OPA189IDR only if AEC-Q100 is not required and 0.3 µV p-p noise reduction justifies +30% supply current. |
| LTC2057IMS8#PBF | Higher offset drift (0.03 µV/°C), slower overload recovery (200 µs), but superior PSRR (140 dB). | Better suited for high-PSRR applications like DAC output buffering in noisy industrial PLCs. | Choose LTC2057IMS8#PBF when supply ripple rejection is more critical than thermal drift or transient response. |
Compared with OPA189IDR and LTC2057IMS8#PBF, AD8629WARZ-RL uniquely balances automotive qualification, sub-µV offset stability, and 50 µs overload recovery - making it the only option qualified for safety-critical automotive sensor nodes requiring both precision and robustness.
Availability
AD8629WARZ-RL is available at Aetrix Electronics and suitable for automotive pressure sensing, medical thermocouple amplification, precision current shunt monitoring, strain gage bridge conditioning, and infrared sensor preamplification requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8629WARZ-RL 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, founded in 1965 and headquartered in Wilmington, MA.
The AD8629WARZ-RL belongs to Analog Devices' zero-drift precision op amp product line, engineered specifically for automotive and industrial sensor signal chains demanding uncompromised dc accuracy, low noise, and guaranteed reliability over extreme temperature ranges.
FAQ
What is the maximum operating temperature range for AD8629WARZ-RL?
The AD8629WARZ-RL is rated for continuous operation from −40°C to +125°C and is AEC-Q100 Grade 1 qualified. This extended temperature range is validated through accelerated life testing and thermal cycling per automotive reliability standards, ensuring stable performance in engine bay and transmission control unit environments where ambient temperatures exceed 105°C.
Does AD8629WARZ-RL require external capacitors for stability?
No, AD8629WARZ-RL is unity-gain stable and requires no external compensation capacitors. Its internal architecture is optimized for rail-to-rail operation and low-noise performance without external components - simplifying layout and reducing BOM count in space-constrained automotive modules.
Is AD8629WARZ-RL pin-compatible with other op amps in the AD8628/AD8629/AD8630 family?
Yes, AD8629WARZ-RL uses the same 8-lead SOIC_N (R-8) package and pinout as AD8629ARZ and AD8629WARZ-R7. All share identical pin assignments: OUT (1), −IN (2), +IN (3), V− (4), V+ (5), NC (6), NC (7), NC (8). This allows drop-in replacement within the same package variant without PCB revision.
How does the auto-zero + chopping architecture of AD8629WARZ-RL reduce 1/f noise?
The AD8629WARZ-RL's patented ping-pong architecture alternates between auto-zeroing and chopping stages at 15 kHz, effectively canceling low-frequency 1/f noise components before they appear at the output. This results in 0.5 µV p-p (0.1–10 Hz) noise - 50% lower than prior-generation auto-zero amplifiers - without introducing significant energy at the clock frequency.
Can AD8629WARZ-RL drive capacitive loads directly?
AD8629WARZ-RL can drive capacitive loads up to 100 pF while maintaining phase margin >45° and monotonic step response. For loads exceeding 100 pF, a series isolation resistor (≥100 Ω) is recommended between the output and capacitance to prevent peaking or oscillation - verified in Figure 25 of the Rev. M datasheet.
AD8629WARZ-RL 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:
- 2
- 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:
- -
- 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
AD8629WARZ-RL FAQ
1.How can I place an order for AD8629WARZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8629WARZ-RL 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 AD8629WARZ-RL reliable?
The price and inventory of AD8629WARZ-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8629WARZ-RL is usually 5 days.
3.What payment methods are accepted for AD8629WARZ-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8629WARZ-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8629WARZ-RL?
AD8629WARZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8629WARZ-RL 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 AD8629WARZ-RL?
For technical support, including AD8629WARZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8629WARZ-RL requirements.
6.How does Aetrix verify that AD8629WARZ-RL is sourced from the original manufacturer or authorized distributors?
All AD8629WARZ-RL 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 AD8629WARZ-RL meets industry standards.
7.What is the process for return or replacement of AD8629WARZ-RL?
All AD8629WARZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with AD8629WARZ-RL, 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 AD8629WARZ-RL part is unused and in its original packaging.
Return procedure for AD8629WARZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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