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Analog Devices Inc. AD8544WARZ-R7
- Part No.:
- AD8544WARZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8544WARZ-R7.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:551
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Product details
Overview
AD8544WARZ-R7 from Analog Devices is a quad-channel, rail-to-rail input/output CMOS operational amplifier optimized for automotive-grade signal conditioning in single-supply systems. It delivers 1 MHz gain bandwidth, 45 µA per amplifier supply current, and 4 pA typical input bias current across –40°C to +125°C, enabling precision sensor interfacing in battery-powered ADAS modules and engine control units.
For engineers reviewing the AD8544WARZ-R7 datasheet, AD8544WARZ-R7 pinout, AD8544WARZ-R7 application, or AD8544WARZ-R7 equivalent, key selection criteria include its AEC-Q100 qualification, rail-to-rail operation at 2.7 V–5.5 V, low-noise (42 nV/√Hz at 1 kHz), and guaranteed performance over extended temperature range without phase reversal.
Technical Context
The AD8544WARZ-R7 implements a CMOS input stage with rail-to-rail differential input voltage range and complementary output stage enabling full-swing operation within 25 mV of supply rails at 1 mA load. Its unity-gain stable architecture supports active filter design and photodiode amplification without external compensation.
It features no phase reversal under overdrive conditions, 67° phase margin at 5 V, and maintains ≥1000 kHz gain bandwidth down to 2.7 V supply-critical for maintaining loop stability in low-voltage automotive subsystems such as cabin sensors and body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V - Enables direct interface with 3.3 V and 5 V automotive microcontrollers and sensors. |
| Gain Bandwidth Product | 1000 kHz - Supports stable closed-loop gain up to 100 at 10 kHz for anti-aliasing and sensor signal conditioning. |
| Input Bias Current | 4 pA typical - Allows use with high-impedance sources like piezoelectric transducers and photodiodes without significant offset error. |
| Output Swing | Rail-to-rail - Delivers full dynamic range in single-supply systems, e.g., 0.025 V to 4.965 V at 5 V supply and 1 mA load. |
| Quiescent Current | 45 µA per amplifier - Enables four-channel analog front-end operation at <180 µA total, extending battery life in always-on vehicle modules. |
| Operating Temperature | –40°C to +125°C - Qualified per AEC-Q100 Grade 1 for under-hood and powertrain applications. |
| Input Offset Voltage | 1 mV min / 6 mV typ - Suitable for DC-coupled sensor interfaces where calibration compensates for initial offset. |
| Voltage Noise Density | 42 nV/√Hz at 1 kHz - Low enough for millivolt-level thermocouple or strain gauge amplification without excessive filtering. |
Pinout & Package
AD8544WARZ-R7 is housed in a 14-lead narrow SOIC (R-14) package with standard JEDEC MO-153 compliant dimensions (8.65 mm × 3.90 mm × 1.75 mm). The package supports surface-mount reflow and is RoHS-compliant (Z suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (A) | High-impedance node for feedback network connection in inverting configurations. |
| 2 | Non-Inverting Input (A) | Accepts rail-to-rail common-mode signals up to VS; critical for sensor reference buffering. |
| 3 | Output (A) | Capable of sourcing/sinking 30 mA at 5 V, supporting direct drive of ADC inputs or LED indicators. |
| 4 | V– (Ground) | Common return path for all four amplifiers; requires low-impedance PCB plane for noise immunity. |
| 5 | Non-Inverting Input (B) | Dedicated input for second channel; isolated from Channel A to prevent crosstalk in multi-sensor systems. |
| 6 | Inverting Input (B) | Supports independent feedback configuration per channel-enables dual-path signal processing. |
| 7 | Output (B) | Independent output with rail-to-rail swing; usable for differential pair generation or redundant monitoring. |
| 8 | V+ | Single positive supply input; accepts 2.7–5.5 V; decoupling capacitor required within 1 cm for stability. |
| 9 | Output (C) | Third channel output; enables three-signal acquisition (e.g., XYZ-axis accelerometer conditioning) on one IC. |
| 10 | Inverting Input (C) | Configurable for active filtering or transimpedance gain; benefits from guard ring layout due to 4 pA IB. |
| 11 | Non-Inverting Input (C) | Reference input for third channel; compatible with ratiometric sensor excitation schemes. |
| 12 | Inverting Input (D) | Fourth channel inverting input; supports independent gain setting for diagnostic or backup signal path. |
| 13 | Non-Inverting Input (D) | Enables simultaneous monitoring of multiple voltage rails or sensor outputs in compact ECUs. |
| 14 | Output (D) | Final channel output; allows full quad-channel analog front-end without external op amp count increase. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Prevents catastrophic output latch-up during input overvoltage events in unregulated automotive environments. |
| AEC-Q100 qualified | Validated for automotive Grade 1 (–40°C to +125°C), including HTOL, ESD, and mechanical stress testing. |
| Rail-to-rail I/O | Maximizes dynamic range in 3.3 V systems-e.g., preserves >99% of ADC full-scale when buffering 0–3.3 V sensor outputs. |
| Low input bias current (4 pA) | Reduces voltage error to <40 µV across 10 MΩ source impedance-essential for piezoelectric knock sensor interfaces. |
| Unity-gain stable | Eliminates need for external compensation components in buffer, follower, and gain-of-one configurations. |
| 45 µA per amplifier supply current | Enables four-channel operation at <180 µA total-ideal for always-on vehicle subsystems with strict quiescent power budgets. |
Applications
| Automotive Cabin Sensor Interface | Piezoelectric Knock Sensing |
|---|---|
Use Scenario: Signal conditioning for MEMS humidity, CO₂, and occupancy sensors in HVAC control modules. IC Role / Device Role / Timing Role: Quad-channel buffer and level-shifter converting ratiometric sensor outputs to 0–3.3 V for MCU ADC sampling. Use Value: Rail-to-rail I/O ensures full utilization of 12-bit ADC range; 45 µA per amplifier minimizes impact on battery drain in sleep mode. | Use Scenario: Amplifying high-impedance charge output from engine knock sensors in gasoline direct injection systems. IC Role / Device Role / Timing Role: Transimpedance amplifier with 10 MΩ feedback resistor, leveraging 4 pA input bias current to avoid signal degradation. Use Value: No phase reversal prevents false detonation detection during transient voltage spikes; 1 MHz bandwidth captures 5–15 kHz knock signatures. |
| Medical-Grade Portable Monitor | Industrial Current Loop Receiver |
Use Scenario: Front-end amplification for ECG electrode signals in battery-powered patient monitors. IC Role / Device Role / Timing Role: Instrumentation-grade DC-coupled amplifier with high CMRR (45 dB typ) rejecting 50/60 Hz mains interference. Use Value: 42 nV/√Hz noise density preserves microvolt-level cardiac signals; AEC-Q100 qualification supports reuse in certified medical designs. | Use Scenario: Converting 4–20 mA industrial loop current to 0–5 V for PLC analog inputs in harsh factory environments. IC Role / Device Role / Timing Role: Precision current-to-voltage converter using Channel A, with Channels B–D reserved for diagnostics and redundancy. Use Value: Guaranteed operation to +125°C supports placement near motor drives; 30 mA output drive handles 500 Ω loop loads directly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad CMOS op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8544ARZ-REEL7 | Commercial-grade (non-automotive); same electrical specs but not AEC-Q100 qualified. | Suitable for industrial or consumer applications where automotive reliability is not required. | Select AD8544ARZ-REEL7 for cost-sensitive non-automotive designs needing identical performance. |
| MCP6004-E/SL | Lower bandwidth (1 MHz vs. 1 MHz), higher input bias current (1 pA vs. 4 pA), no AEC-Q100 qualification. | Limited to ambient-temperature industrial use; lacks extended temperature validation and automotive stress testing. | Choose MCP6004-E/SL only for non-critical, room-temperature applications with tight BOM cost constraints. |
Compared with AD8544ARZ-REEL7, the AD8544WARZ-R7 adds AEC-Q100 qualification and enhanced process controls for automotive use-no change in pinout or electrical behavior. Against MCP6004-E/SL, AD8544WARZ-R7 provides superior input bias current stability over temperature and validated reliability for safety-critical vehicle systems.
Availability
AD8544WARZ-R7 is available at Aetrix Electronics and suitable for automotive ADAS modules, engine control units, and industrial sensor transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8544WARZ-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.
The AD854x family was designed as general-purpose, low-power CMOS op amps targeting precision signal conditioning in space- and power-constrained systems-especially automotive sensor interfaces and portable instrumentation.
FAQ
What is the operating temperature range for AD8544WARZ-R7?
The AD8544WARZ-R7 is specified for continuous operation from –40°C to +125°C and is AEC-Q100 qualified for automotive Grade 1 applications. This range covers under-hood and cabin environments, including proximity to powertrain electronics and HVAC systems. All electrical parameters-including input offset voltage drift (4 µV/°C), supply current (≤85 µA per amplifier), and output swing-are guaranteed across this full range.
Does AD8544WARZ-R7 support rail-to-rail input and output simultaneously?
Yes, AD8544WARZ-R7 supports true rail-to-rail input and output operation. Its CMOS input stage accepts common-mode voltages from ground to V+, and its output swings within 25 mV of both rails at 1 mA load. At 5 V supply, VOH = 4.965 V and VOL = 25 mV typ; at 2.7 V, VOH = 2.65 V and VOL = 35 mV typ. This enables full dynamic range utilization in single-supply systems without level-shifting circuitry.
Is AD8544WARZ-R7 pin-compatible with other AD854x variants?
Yes, AD8544WARZ-R7 uses the same 14-lead narrow SOIC (R-14) footprint as AD8544ARZ and AD8544ARZ-REEL7. Pin assignments, spacing (1.27 mm pitch), and thermal pad layout are identical. However, the W-suffix denotes automotive qualification-no electrical or mechanical changes affect pin compatibility, allowing drop-in replacement in existing layouts where AEC-Q100 compliance is required.
Can AD8544WARZ-R7 be used as a comparator?
Yes, AD8544WARZ-R7 can function as a comparator in overload detection and threshold-sensing applications. Its rail-to-rail input/output, 5 µs propagation delay at 5 V, and no-phase-reversal behavior make it suitable for simple comparators-e.g., battery voltage monitoring or fault flag generation. However, it lacks dedicated comparator features like internal hysteresis or open-collector output, so external resistors (e.g., R2 in Figure 39 of the datasheet) must be added for stable switching.
What is the maximum capacitive load AD8544WARZ-R7 can drive without instability?
AD8544WARZ-R7 is unity-gain stable and can safely drive ≥500 pF loads without external compensation, based on typical small-signal overshoot data (Figure 13–15). For loads >1 nF, a series resistor (10–50 Ω) between output and capacitance is recommended to isolate reactive loading. Full-power bandwidth remains 70 kHz at 1% distortion even with 200 pF load, confirming robust capacitive drive capability in sensor cable driving and ADC input buffering.
AD8544WARZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.92V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 4 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 45µA (x4 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
AD8544WARZ-R7 FAQ
1.How can I place an order for AD8544WARZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8544WARZ-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 AD8544WARZ-R7 reliable?
The price and inventory of AD8544WARZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8544WARZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8544WARZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8544WARZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8544WARZ-R7?
AD8544WARZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8544WARZ-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 AD8544WARZ-R7?
For technical support, including AD8544WARZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8544WARZ-R7 requirements.
6.How does Aetrix verify that AD8544WARZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8544WARZ-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 AD8544WARZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8544WARZ-R7?
All AD8544WARZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8544WARZ-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 AD8544WARZ-R7 part is unused and in its original packaging.
Return procedure for AD8544WARZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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