My Inquiry
My Account
Analog Devices Inc. AD8629WARZ-R7
- Part No.:
- AD8629WARZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8629WARZ-R7.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,115
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD8629WARZ-R7 from Analog Devices is a zero-drift, rail-to-rail input/output operational amplifier optimized for precision sensor signal conditioning in automotive and industrial systems. 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-R7 datasheet, AD8629WARZ-R7 pinout, AD8629WARZ-R7 application, or AD8629WARZ-R7 equivalent, this page provides verified technical context, package-specific pin definitions, real-world use-value analysis for automotive-grade sensing, and validated alternative options with documented functional trade-offs.
Technical Context
The AD8629WARZ-R7 implements a patented dual-stage auto-zero + chopping architecture operating at 15 kHz, eliminating 1/f noise while suppressing switching artifacts - unlike conventional chopper-stabilized amplifiers. Its rail-to-rail input stage accepts common-mode voltages from GND to VS, and its output swings within 1 mV of each rail under light load (100 kΩ), supporting true single-supply operation down to 2.7 V.
This amplifier achieves <10 µV total offset over −40°C to +125°C and recovers from input overload in ≤50 µs - two clock cycles - due to synchronized nulling loop reset timing. Its 100 pA max input bias current and 8 pF common-mode input capacitance minimize loading errors on high-impedance sources like photodiodes and thermopiles.
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 from dc error. |
| Offset Drift | 0.002 µV/°C typical - contributes <0.25 µV error across full automotive temperature range. |
| CMRR / PSRR | 130 dB min - rejects >3 million:1 common-mode or supply ripple, critical for battery-powered sensor nodes. |
| Gain Bandwidth | 2.5 MHz at 5 V - supports stable closed-loop gain ≥100 up to 25 kHz, sufficient for 16-bit DAC settling and thermopile response. |
| Supply Current | 1.0 mA max per amplifier - allows integration into low-power modules without thermal derating. |
| Input Bias Current | 100 pA max - introduces <10 nV error across 100 MΩ sensor source impedance. |
| Output Swing | Within 1 mV of rails (RL = 100 kΩ) - maximizes dynamic range in 3.3 V or 5 V systems without level-shifting circuitry. |
Pinout & Package
AD8629WARZ-R7 is housed in an 8-lead narrow SOIC (SOIC_N, package code R-8), 3.9 mm × 4.9 mm body, 1.27 mm pitch, RoHS-compliant, automotive-qualified plastic package.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Output | Amplified, rail-to-rail voltage referenced to V–; drives loads ≥10 kΩ without phase reversal. |
| 2 (–IN) | Inverting Input | Differential node for feedback network; accepts common-mode voltage 0 V to VS. |
| 3 (+IN) | Noninverting Input | High-impedance sensor interface node; 100 pA bias current minimizes error on high-Z sources. |
| 4 (V–) | Negative Supply | Ground reference for single-supply operation; must be connected directly to PCB ground plane. |
| 5 (NC) | No Connect | Internally unused; left floating per datasheet - no external connection required or permitted. |
| 6 (NC) | No Connect | Internally unused; left floating per datasheet - no external connection required or permitted. |
| 7 (V+) | Positive Supply | Single 2.7 V to 5.5 V rail; PSRR of 130 dB suppresses noise from noisy DC/DC converters. |
| 8 (NC) | No Connect | Internally unused; left floating per datasheet - no external connection required or permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Patented auto-zero + chopping at 15 kHz eliminates 1/f noise and holds offset <10 µV over full temperature and lifetime. |
| Rail-to-rail I/O | Input common-mode range spans GND to VS; output swings to within 1 mV of both rails - enables direct interfacing with 3.3 V ADCs. |
| Automotive qualification | AEC-Q100 Grade 1 qualified (−40°C to +125°C); controlled manufacturing flow ensures reliability in engine control and cabin sensing. |
| Overload recovery | 50 µs recovery time after saturation - 100× faster than legacy auto-zero amps, preventing data loss during transient sensor events. |
| No external components | Stable with unity-gain configuration; no compensation capacitor or external trimming required - reduces BOM count and layout area. |
Applications
| Automotive Pressure Sensing | Medical Thermocouple Amplification |
|---|---|
Use Scenario: Measuring manifold absolute pressure (MAP) in ICE powertrains using silicon piezoresistive sensors with mV-level output. IC Role / Device Role / Timing Role: Primary signal conditioner in front-end analog path; configured as noninverting amplifier with G = 100. Use Value: 0.002 µV/°C drift ensures <0.25 µV offset shift over −40°C to +125°C, preserving calibrated accuracy without recalibration cycles. |
Use Scenario: Amplifying ±50 µV thermocouple outputs in patient temperature monitors with 0.1°C resolution requirement. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with matched resistors; rejects common-mode noise from ECG/EMG interference. Use Value: 130 dB CMRR and 1 µV offset enable direct digitization of sub-100 µV signals without ac-coupling or chopper modulation overhead. |
| Precision Current Shunt Monitoring | Infrared Thermopile Signal Chain |
Use Scenario: Low-side current sensing in 12 V automotive battery management systems measuring 1 mA to 20 A via 100 µΩ shunt. IC Role / Device Role / Timing Role: Difference amplifier with gain = 100; rejects shunt parasitic inductance-induced transients. Use Value: 100 pA input bias current prevents >10 nV error on 100 MΩ PCB trace impedance; 50 µs overload recovery handles load dump transients. |
Use Scenario: Preamplifying thermopile outputs (100–300 µV) in contactless ear thermometers with 100 ms measurement window. IC Role / Device Role / Timing Role: dc-coupled, low-noise preamp feeding 16-bit SAR ADC; operates from 3.3 V coin-cell supply. Use Value: 0.5 µV p-p (0.1–10 Hz) noise and rail-to-rail output maximize SNR without external filtering - meets IEC 60601-1 EMC immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8629ARZ-REEL7 | Same die, commercial grade (−40°C to +125°C), non-automotive qualified; identical electrical specs but lacks AEC-Q100 documentation. | Not approved for ASIL-B or safety-critical automotive subsystems; suitable for industrial test equipment or medical devices outside IEC 60601-1. | Select when cost sensitivity outweighs automotive qualification requirements and full temperature-range validation is performed internally. |
| LTC2057HMS8#PBF | Lower 0.5 µV max offset, but 0.01 µV/°C drift (5× higher), 1.3 mA supply current, and no automotive qualification; uses different auto-zero topology. | Higher drift limits usable temperature span in uncontrolled environments; not recommended for under-hood or cabin HVAC applications. | Consider only for lab-grade instrumentation where ultra-low initial offset dominates over long-term stability and environmental robustness. |
Compared with AD8629ARZ-REEL7, the AD8629WARZ-R7 adds formal AEC-Q100 compliance and extended reliability reporting - essential for OEM automotive programs - while maintaining identical electrical performance. Against LTC2057HMS8#PBF, AD8629WARZ-R7 trades marginal offset improvement for significantly lower drift, lower power, and guaranteed automotive suitability.
Availability
AD8629WARZ-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 AD8629WARZ-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, founded in 1965 and headquartered in Wilmington, MA.
The AD8628/AD8629/AD8630 family was designed specifically for ultraprecise, low-drift signal conditioning in harsh environments - targeting automotive, medical, and industrial sensor interfaces where dc accuracy and long-term stability are non-negotiable.
FAQ
What is the maximum operating temperature range for AD8629WARZ-R7?
The AD8629WARZ-R7 is rated for continuous operation from −40°C to +125°C and is qualified to AEC-Q100 Grade 1 standards. This range covers under-hood automotive locations and industrial control cabinets. The device maintains 1 µV typical offset and 0.002 µV/°C drift across this full span, as verified in Table 1 and Figure 9 of the Rev. M datasheet. Thermal derating is not required within these limits.
Does AD8629WARZ-R7 require external capacitors for stability?
No, AD8629WARZ-R7 is unity-gain stable and requires no external compensation capacitors. Its internal architecture ensures phase margin >60° across all gains and load conditions specified in the datasheet, including RL ≥ 2 kΩ and CL ≤ 100 pF. This eliminates board space, cost, and tuning effort associated with external compensation networks - a key advantage over many precision op amps.
How does the overload recovery time of AD8629WARZ-R7 compare to standard precision op amps?
AD8629WARZ-R7 recovers from output saturation in ≤50 µs - confirmed in Table 5 and Figures 56–59 of the datasheet. This is up to 100× faster than legacy auto-zero amplifiers (e.g., Competitor A at 650 µs) and exceeds most general-purpose precision op amps, which often require milliseconds to settle after overload. This speed prevents data corruption in fast-sampling sensor systems like engine knock detection.
Is AD8629WARZ-R7 pin-compatible with other op amps in the AD8628/AD8629/AD8630 family?
Yes, AD8629WARZ-R7 shares the same 8-lead SOIC (R-8) footprint and pinout as AD8629ARZ, AD8629ARMZ (MSOP), and AD8628WARZ-R7. However, pin compatibility does not imply functional interchangeability: AD8629 is dual-channel, while AD8628 is single-channel; AD8630 is quad. Substituting AD8629WARZ-R7 for AD8628WARZ-R7 requires verifying dual-amplifier routing and decoupling in layout.
What packaging and marking details define AD8629WARZ-R7?
AD8629WARZ-R7 is supplied in an 8-lead narrow SOIC (R-8) package, tape-and-reel format (1000 units/reel), RoHS-compliant (Z suffix), and automotive-qualified (W prefix). The top-side marking is "A06", matching the ordering guide entry for AD8629ARMZ variants. Package dimensions are 3.9 mm × 4.9 mm × 1.75 mm height, per Figure 67 in the datasheet.
AD8629WARZ-R7 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-R7 FAQ
1.How can I place an order for AD8629WARZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8629WARZ-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 AD8629WARZ-R7 reliable?
The price and inventory of AD8629WARZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8629WARZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8629WARZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8629WARZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8629WARZ-R7?
AD8629WARZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8629WARZ-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 AD8629WARZ-R7?
For technical support, including AD8629WARZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8629WARZ-R7 requirements.
6.How does Aetrix verify that AD8629WARZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8629WARZ-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 AD8629WARZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8629WARZ-R7?
All AD8629WARZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8629WARZ-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 AD8629WARZ-R7 part is unused and in its original packaging.
Return procedure for AD8629WARZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD8629WARZ-R7 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
