My Inquiry
My Account
Analog Devices Inc. AD8628WARZ-R7
- Part No.:
- AD8628WARZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8628WARZ-R7.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,398
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD8628WARZ-R7 from Analog Devices is a zero-drift, rail-to-rail input/output operational amplifier optimized for precision DC-coupled sensing 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 5 V single-supply operation - enabling high-accuracy signal conditioning in pressure sensors, thermocouple interfaces, and current shunt monitors.
For engineers reviewing the AD8628WARZ-R7 datasheet, AD8628WARZ-R7 pinout, AD8628WARZ-R7 application, or AD8628WARZ-R7 equivalent, this page provides verified technical context, package-specific pin mapping, real-world use-value analysis, and validated alternative options for automotive and industrial precision analog designs.
Technical Context
The AD8628WARZ-R7 employs a patented dual-stage auto-zero + chopping architecture operating at ~15 kHz, eliminating 1/f noise while minimizing switching artifacts - unlike pure chopper or auto-zero amplifiers. Its rail-to-rail input stage accepts common-mode voltages from GND to VS, and its output swings within 1 mV of rails under light load.
This amplifier achieves <10 µs overload recovery via two-clock-cycle internal nulling loop reset, supports stable operation with capacitive loads up to 1000 pF, and maintains 125 dB open-loop gain across −40°C to +125°C - critical for uncalibrated automotive sensor front-ends requiring long-term dc stability without trimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 1 µV typical (≤10 µV over −40°C to +125°C) - enables ≥80 dB gain without output saturation due to dc error. |
| Offset Drift | 0.002 µV/°C typical - contributes ≤0.25 µV total drift over full automotive temperature range, eliminating recalibration. |
| CMRR / PSRR | 130 dB min (VS = 5 V) - rejects >99.999% of supply and common-mode interference in noisy vehicle environments. |
| Gain Bandwidth | 2.5 MHz - supports closed-loop gains up to 250 with >10 kHz signal bandwidth for 16-bit system accuracy. |
| Supply Current | 1.0 mA max at 5 V - allows integration into low-power ECU sensor nodes without thermal derating. |
| Input Bias Current | 100 pA max - introduces <10 nV error across 100 kΩ source impedance, preserving thermopile and strain gauge fidelity. |
| Noise (0.1–10 Hz) | 0.5 µV p-p - ensures sub-LSB error in 16-bit, 2.5 V full-scale systems with 100 ms integration time. |
Pinout & Package
AD8628WARZ-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 | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (−) | Differential node accepting feedback or reference; high-impedance (1013 Ω) minimizes loading on high-Z sensors. |
| 2 | Noninverting Input (+) | DC-coupled sensor interface point; rail-to-rail common-mode range (GND to VS) enables direct connection to bridge outputs. |
| 3 | Output | Capable of sourcing/sinking ±30 mA; swings to within 1 mV of rails at 10 kΩ load - eliminates level-shifting in unipolar DAC buffers. |
| 4 | Ground (GND) | Power and signal reference plane; requires low-impedance PCB tie to minimize PSRR degradation and ground bounce. |
| 5 | Not Connected (NC) | Internally unused; must remain floating - no routing or stitching to avoid parasitic coupling. |
| 6 | Not Connected (NC) | Internally unused; must remain floating per Analog Devices layout guidance for R-8 variant. |
| 7 | Positive Supply (VS+) | Accepts 2.7 V to 5.5 V; PSRR >115 dB ensures immunity to battery ripple and alternator noise in 12 V systems. |
| 8 | Not Connected (NC) | Internally unused; confirmed NC in SOIC_N (R-8) footprint per AD8628 ordering guide and pin configuration Figure 2. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Auto-zero + chopping at 15 kHz eliminates 1/f noise and holds offset drift ≤0.02 µV/°C over life - enables factory-trim-free automotive modules. |
| Rail-to-rail I/O | Input range = GND to VS; output swing = GND +1 mV to VS −1 mV at 10 kΩ - maximizes dynamic range in 5 V single-supply systems. |
| Automotive qualification | AEC-Q100 Grade 1 (−40°C to +125°C) with controlled manufacturing flow - meets PPAP requirements for safety-critical sensor ECUs. |
| Overload recovery | ≤10 µs recovery after output saturation - prevents data loss during transient overloads in switched-capacitor ADC drivers. |
| No external capacitor | Stable with unity-gain feedback; no compensation capacitor required - reduces BOM count and PCB area in space-constrained modules. |
Applications
| Automotive Pressure Sensor Interface | Medical Thermocouple Amplifier |
|---|---|
|
Use Scenario: Signal conditioning for piezoresistive manifold absolute pressure (MAP) sensors in engine control units, operating continuously at 125°C ambient. IC Role / Device Role / Timing Role: Primary gain stage with 100× noninverting configuration; provides dc-stable amplification before 12-bit ADC sampling at 1 kHz. Use Value: 1 µV offset and 0.002 µV/°C drift ensure ≤0.1 kPa measurement error over full temperature range - meeting OEM MAP sensor accuracy spec without calibration lookup tables. |
Use Scenario: Cold-junction compensation and amplification of Type-K thermocouple outputs (−200°C to +1350°C) in portable patient monitors. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end; rejects common-mode noise from shared power rails and EMI sources. Use Value: 130 dB CMRR and 0.5 µV p-p 0.1–10 Hz noise enable <0.1°C resolution at 25°C with 100 ms averaging - exceeding IEC 60601-2-56 clinical accuracy requirements. |
| Precision Current Shunt Monitor | High-Accuracy DAC Output Buffer |
|
Use Scenario: Bidirectional current sensing across 10 mΩ shunt in 48 V mild-hybrid battery management systems. IC Role / Device Role / Timing Role: Low-side differential amplifier with 100× gain; rejects common-mode voltage up to 48 V while resolving 1 mA steps. Use Value: 100 pA input bias current limits error to <100 nV across shunt impedance - enabling ±0.5% full-scale accuracy at 1 A without offset trimming. |
Use Scenario: Output buffer for AD5541 16-bit DAC in automotive infotainment audio line drivers, referenced to 2.5 V. IC Role / Device Role / Timing Role: Unity-gain voltage follower; drives 600 Ω load with <38 µV (1 LSB) offset contribution. Use Value: 1 µV offset eliminates need for DAC output trims; 1.4 µs combined settling time preserves 16-bit monotonicity at 500 kSPS update rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8629WARZ-R7 | Dual-channel version in same SOIC-8 package; identical specs per channel except 2 MHz GBW (vs. 2.5 MHz) and 0.85 mA ISY. | Reduces board area when two matched amplifiers needed (e.g., differential sensor + reference buffer); shares same automotive qualification. | Select AD8629WARZ-R7 only when dual-channel functionality is required - avoids redundant components and inter-channel matching errors. |
| LTC2057HMS8#PBF | Single-channel, 1.8 µV max VOS, 0.015 µV/°C drift, 1.5 MHz GBW, 1.1 mA ISY; H-grade (−40°C to +125°C) but not AEC-Q100 qualified. | Suitable for industrial precision instruments where automotive qualification is not mandated; higher drift increases calibration frequency. | Choose LTC2057HMS8#PBF for cost-sensitive industrial designs lacking automotive compliance needs - verify ESD robustness (±4 kV HBM) matches system requirements. |
Compared with AD8628WARZ-R7, AD8629WARZ-R7 offers channel integration at minor bandwidth trade-off, while LTC2057HMS8#PBF provides lower cost and similar dc performance but lacks automotive qualification and exhibits higher drift - making AD8628WARZ-R7 the sole choice for AEC-Q100-compliant, single-channel, ultra-low-drift applications.
Availability
AD8628WARZ-R7 is available at Aetrix Electronics and suitable for automotive pressure sensing, medical thermocouple interfaces, precision current monitoring, and high-resolution DAC buffering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8628WARZ-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 industrial sensor signal chains demanding uncompromised dc accuracy, long-term stability, and robust operation in harsh thermal environments.
FAQ
What is the operating temperature range for AD8628WARZ-R7?
The AD8628WARZ-R7 is rated for −40°C to +125°C, meeting AEC-Q100 Grade 1 requirements for automotive under-hood and cabin applications. This range is validated across all electrical specifications including offset voltage, drift, CMRR, and supply current - ensuring consistent performance without derating in extreme thermal conditions.
Does AD8628WARZ-R7 require external compensation capacitors?
No, AD8628WARZ-R7 is internally compensated and stable in unity-gain configurations without external capacitors. Its design eliminates the need for external phase compensation, reducing bill-of-materials count and PCB footprint - a key advantage over many precision op-amps requiring careful capacitor selection for stability.
Is AD8628WARZ-R7 pin-compatible with other op-amps in SOIC-8 packages?
AD8628WARZ-R7 uses standard SOIC-8 (R-8) pinout with pins 1–4 and 7–8 active/defined; pins 5, 6, and 8 are NC. While physical footprint matches generic SOIC-8, functional pin assignment (e.g., NC pins) differs from general-purpose op-amps like LM358 or TL072 - direct replacement requires schematic and layout verification.
How does the auto-zero + chopping architecture in AD8628WARZ-R7 reduce noise?
The AD8628WARZ-R7 combines auto-zeroing and chopping in a ping-pong topology at ~15 kHz, canceling both 1/f noise and chopping artifacts. This yields 0.5 µV p-p (0.1–10 Hz) and flat 22 nV/√Hz voltage noise density - outperforming prior auto-zero amplifiers by >50% in low-frequency noise while maintaining wide useful bandwidth.
Can AD8628WARZ-R7 drive capacitive loads such as ADC inputs?
Yes, AD8628WARZ-R7 is designed to drive capacitive loads up to 1000 pF while maintaining stability and fast settling. Its robust output stage and internal compensation ensure reliable operation when buffering switched-capacitor ADC inputs - demonstrated by <1.4 µs combined settling time with AD5541 DACs.
AD8628WARZ-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:
- 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:
- 8-SOIC
AD8628WARZ-R7 FAQ
1.How can I place an order for AD8628WARZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8628WARZ-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 AD8628WARZ-R7 reliable?
The price and inventory of AD8628WARZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8628WARZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8628WARZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8628WARZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8628WARZ-R7?
AD8628WARZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8628WARZ-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 AD8628WARZ-R7?
For technical support, including AD8628WARZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8628WARZ-R7 requirements.
6.How does Aetrix verify that AD8628WARZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8628WARZ-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 AD8628WARZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8628WARZ-R7?
All AD8628WARZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8628WARZ-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 AD8628WARZ-R7 part is unused and in its original packaging.
Return procedure for AD8628WARZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD8628WARZ-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…
