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Analog Devices Inc. AD8544WARZ-RL
- Part No.:
- AD8544WARZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8544WARZ-RL.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,450
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Product details
Overview
AD8544WARZ-RL from Analog Devices is a quad-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-power, single-supply operation from 2.7 V to 5.5 V. It delivers 1 MHz gain bandwidth, 45 µA per amplifier supply current, and 4 pA typical input bias current, enabling high-impedance sensor interfacing in automotive and portable systems.
For engineers reviewing the AD8544WARZ-RL datasheet, AD8544WARZ-RL pinout, AD8544WARZ-RL application, or AD8544WARZ-RL equivalent, key selection criteria include its AEC-Q100 qualification, −40°C to +125°C operating range, rail-to-rail output swing within 100 mV of rails at 1 mA load, and verified performance in photodiode amplifiers and ASIC buffering circuits.
Technical Context
The AD8544WARZ-RL implements a CMOS input stage with rail-to-rail differential input voltage range (GND to VS) and rail-to-rail output swing, supporting true single-supply signal conditioning without level-shifting. Its unity-gain stable architecture achieves 67° phase margin at 5 V with 1000 kHz gain-bandwidth product and 0.92 V/µs slew rate under 200 pF capacitive load.
Designed for automotive-grade reliability, it features no phase reversal, 4 µV/°C offset drift over −40°C to +125°C, and guaranteed operation across full temperature range with PSRR of 60 dB minimum and CMRR of 38 dB minimum - critical for noise-prone vehicle ECUs and battery-powered instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V - supports direct connection to Li-ion battery (3.0–4.2 V) and 3.3 V/5 V logic rails without regulation. |
| Gain Bandwidth Product | 1000 kHz - enables stable active filtering up to ~100 kHz with gain ≥10, validated in FDNR notch filter designs. |
| Input Bias Current | 4 pA typical - permits use with >10 MΩ source impedances (e.g., piezoelectric sensors, photodiodes) without significant DC error. |
| Output Voltage Swing | Within 100 mV of rails at 1 mA load - ensures full dynamic range utilization in 3.3 V microcontroller ADC interfaces. |
| Supply Current per Amplifier | 45 µA typical at 5 V - allows four independent channels to operate on <200 µA total, extending battery life in portable medical devices. |
| Operating Temperature | −40°C to +125°C - qualified per AEC-Q100 Grade 1, suitable for engine bay and transmission control unit environments. |
| Input Offset Voltage | 1 mV min / 6 mV typ - enables precision DC-coupled amplification in sensor front-ends where offset calibration is feasible. |
Pinout & Package
AD8544WARZ-RL is housed in a 14-lead narrow SOIC package (R-14), 3.9 mm × 8.7 mm body, 1.27 mm lead pitch, JEDEC MS-012 compliant. Thermal resistance θJA = 115°C/W on standard 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | High-impedance node accepting differential signal; requires guard trace routing to minimize leakage in photodiode applications. |
| 2 | Noninverting Input (Amplifier A) | DC-biased reference point; shielded loop around inverting input recommended for >10 GΩ source impedance layouts. |
| 3 | Output (Amplifier A) | Rail-to-rail capable output driving 15 mA sink/source at 2.7 V; stable into 200 pF capacitive loads per datasheet Figure 13. |
| 4 | Ground (V–) | Common return path for all four amplifiers; separate analog ground plane required to maintain 38 dB CMRR at 125°C. |
| 5 | Noninverting Input (Amplifier B) | Independent high-Z input for second channel; identical bias current spec (4 pA) enables matched dual-sensor conditioning. |
| 6 | Inverting Input (Amplifier B) | Differential input for channel B; pin-compatible with channel A for symmetrical PCB layout in multi-channel filters. |
| 7 | Output (Amplifier B) | Second rail-to-rail output; supports independent gain stages without crosstalk (typical PSRR 76 dB at 25°C). |
| 8 | Supply (V+) | Single positive rail input; decoupling capacitor (0.1 µF X7R) required within 5 mm for stable 1 MHz operation. |
| 9 | Output (Amplifier C) | Third output channel; validated in twin-T notch filter (Figure 36) with Q = 10 at 60 Hz using external R/C network. |
| 10 | Inverting Input (Amplifier C) | Third channel inverting input; shares same input stage architecture as A/B - consistent 4 pA IB and 1 mV VOS distribution. |
| 11 | Noninverting Input (Amplifier C) | Third channel noninverting input; supports buffered reference generation when used with unity-gain configuration. |
| 12 | Noninverting Input (Amplifier D) | Fourth high-Z input; enables simultaneous monitoring of four independent sensors (e.g., quad thermistor array). |
| 13 | Inverting Input (Amplifier D) | Fourth differential input; identical electrical specs to pins 1/6/10 ensure channel-to-channel matching in multistage filters. |
| 14 | Output (Amplifier D) | Final rail-to-rail output; drives 30 mA at 5 V (VS − 1 V), sufficient for driving ADC reference buffers or LED bias circuits. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Eliminates output latch-up during common-mode overvoltage events - critical for ASIC I/O protection in automotive infotainment systems. |
| Rail-to-rail input and output | Enables full-scale signal capture from 0 V to VS without external level-shifting, reducing component count in portable ECG front-ends. |
| AEC-Q100 qualified | Validated for automotive Grade 1 (−40°C to +125°C), including HTOL, TC, and ESD testing - meets ISO/TS 16949 production requirements. |
| Low input bias current (4 pA) | Supports integration with high-impedance sources like electret microphones and humidity sensors without signal degradation. |
| Unity-gain stable | Permits direct use in voltage followers and active filters without external compensation - simplifies design of 60 Hz notch filters. |
Applications
| Automotive Sensor Interface | Piezoelectric Transducer Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying low-level signals from knock sensors mounted on engine blocks under high-temperature, high-vibration conditions. IC Role / Device Role / Timing Role: Quad-channel signal conditioner providing four independent gain stages with rail-to-rail output swing to match 12-bit ADC input range. Use Value: AEC-Q100 qualification and −40°C to +125°C operation ensure functional reliability; 4 pA input bias prevents signal loss across 1 MΩ sensor impedance. |
Use Scenario: Converting charge output from accelerometers and pressure transducers into low-impedance voltage signals for data acquisition. IC Role / Device Role / Timing Role: Charge amplifier configured with feedback capacitor and resistor to integrate high-impedance current source. Use Value: 1 MHz bandwidth supports transient response analysis up to 100 kHz; rail-to-rail output maximizes dynamic range in battery-powered test equipment. |
| Medical Instrumentation Front-End | Portable Audio Output Buffer |
|
Use Scenario: Amplifying biopotential signals (ECG, EEG) with minimal added noise and DC offset in handheld diagnostic devices. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with high input impedance and low power consumption for extended battery life. Use Value: 45 µA per amplifier enables four-channel acquisition on coin-cell batteries; 40 nV/√Hz voltage noise preserves signal integrity at 1 kHz. |
Use Scenario: Driving stereo headphone outputs or line-level signals in Bluetooth speakers and voice assistants. IC Role / Device Role / Timing Role: Rail-to-rail output buffer delivering 30 mA peak current per channel at 3.3 V supply. Use Value: 0.92 V/µs slew rate prevents slew-induced distortion in 20 kHz audio band; low THD ensures <0.1% distortion at 1 kHz. |
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-REEL | Commercial-grade (non-automotive); identical electrical specs but not AEC-Q100 qualified. | Limited to industrial/portable applications; unsuitable for under-hood automotive use. | Select AD8544WARZ-RL when automotive qualification, extended temperature validation, or PPAP documentation is required. |
| MCP6004-E/SL | Lower bandwidth (1 MHz vs. 1 MHz), higher supply current (100 µA vs. 45 µA), no AEC-Q100 rating. | Acceptable for cost-sensitive consumer electronics but lacks thermal stability and automotive reliability data. | Choose AD8544WARZ-RL for designs requiring guaranteed −40°C to +125°C performance and automotive compliance documentation. |
Compared with AD8544ARZ-REEL and MCP6004-E/SL, AD8544WARZ-RL provides unique AEC-Q100 qualification, lower supply current, and tighter offset drift (4 µV/°C), making it the only option qualified for safety-critical automotive sensor nodes and long-life portable medical devices.
Availability
AD8544WARZ-RL is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable medical instrumentation, piezoelectric transducer signal conditioning, and battery-powered audio output stages requiring stable component supply across extended temperature ranges.
Supply support for AD8544WARZ-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, headquartered in Wilmington, MA.
The AD854x family was developed to deliver rail-to-rail precision amplification with ultra-low power for automotive, medical, and portable instrumentation - emphasizing AEC-Q100 compliance, wide temperature operation, and high-impedance interface capability.
FAQ
What is the operating temperature range for AD8544WARZ-RL?
AD8544WARZ-RL is specified for −40°C to +125°C operation and qualified per AEC-Q100 Grade 1. This range is validated across all electrical parameters including input offset voltage drift (4 µV/°C), PSRR (60 dB min), and output drive capability (15 mA at 2.7 V), making it suitable for engine control units and transmission modules.
Is AD8544WARZ-RL pin-compatible with AD8544ARZ-REEL?
Yes, AD8544WARZ-RL uses the same 14-lead narrow SOIC (R-14) package as AD8544ARZ-REEL, with identical pinout, footprint, and soldering profile. The only differences are automotive qualification, enhanced screening, and updated marking code - allowing drop-in replacement in existing designs requiring AEC-Q100 compliance.
Can AD8544WARZ-RL be used as a comparator?
Yes, AD8544WARZ-RL supports comparator operation due to rail-to-rail input range, rail-to-rail output, and 5 µs propagation delay at 5 V. Its open-loop gain and speed/power ratio enable overload detection circuits (Figure 39), though dedicated comparators offer faster response and built-in hysteresis.
What is the maximum capacitive load AD8544WARZ-RL can drive stably?
AD8544WARZ-RL maintains stability into 200 pF capacitive loads at unity gain, as confirmed by small-signal overshoot testing (Figures 13–15). For loads >200 pF, a series resistor (≥100 Ω) between output and capacitance is recommended to preserve phase margin above 60°.
Does AD8544WARZ-RL require external compensation for unity-gain operation?
No, AD8544WARZ-RL is unity-gain stable with 67° phase margin at 5 V, as verified in the datasheet's open-loop gain/phase plots (Figure 30). No external compensation components are needed for voltage follower, active filter, or integrator configurations - simplifying layout and reducing BOM count.
AD8544WARZ-RL 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-RL FAQ
1.How can I place an order for AD8544WARZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8544WARZ-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 AD8544WARZ-RL reliable?
The price and inventory of AD8544WARZ-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8544WARZ-RL is usually 5 days.
3.What payment methods are accepted for AD8544WARZ-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8544WARZ-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8544WARZ-RL?
AD8544WARZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8544WARZ-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 AD8544WARZ-RL?
For technical support, including AD8544WARZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8544WARZ-RL requirements.
6.How does Aetrix verify that AD8544WARZ-RL is sourced from the original manufacturer or authorized distributors?
All AD8544WARZ-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 AD8544WARZ-RL meets industry standards.
7.What is the process for return or replacement of AD8544WARZ-RL?
All AD8544WARZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with AD8544WARZ-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 AD8544WARZ-RL part is unused and in its original packaging.
Return procedure for AD8544WARZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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