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Analog Devices Inc. AD8668WARUZ-R7
- Part No.:
- AD8668WARUZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD8668WARUZ-R7.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,025
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Product details
Overview
AD8668WARUZ-R7 from Analog Devices is a quad, rail-to-rail output operational amplifier optimized for precision sensor signal conditioning and automotive-grade applications. It operates from 5 V to 16 V single supply (±2.5 V to ±8 V dual), delivers 4 MHz gain bandwidth, 3.5 V/μs slew rate, and features 2.5 mV max input offset voltage with 1 pA max input bias current. It is used in high-impedance photodiode amplification and medical physiological measurement front-ends.
For engineers reviewing the AD8668WARUZ-R7 datasheet, AD8668WARUZ-R7 pinout, AD8668WARUZ-R7 application, or AD8668WARUZ-R7 equivalent, key selection criteria include its automotive qualification (−40°C to +125°C), rail-to-rail output swing within 40 mV of rails at 1 mA load, low 8 nV/√Hz noise at 10 kHz, and guaranteed 70° phase margin for stable unity-gain operation.
Technical Context
The AD8668WARUZ-R7 implements a precision CMOS input stage with rail-to-rail output stage, enabling full dynamic range utilization in single-supply systems. Its 4 MHz GBP and 3.5 V/μs slew rate support fast-settling ADC driver and active filter applications up to 100 kHz without phase distortion.
It maintains 110 dB PSRR and 110 dB CMRR at DC under 16 V supply, ensuring robust performance in noisy automotive power environments. The amplifier is unity-gain stable and exhibits no output phase reversal under common-mode overvoltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5 V to 16 V single supply; supports direct interface with 12 V automotive systems and 16 V industrial rails. |
| Gain Bandwidth Product | 4 MHz; enables stable closed-loop operation up to 100 kHz with ≥60° phase margin in unity-gain buffer configuration. |
| Input Offset Voltage | 2.5 mV max at 25°C; ensures ≤12.5 mV total error across −40°C to +125°C, critical for DC-coupled sensor bridges. |
| Input Bias Current | 1 pA max at 25°C; preserves signal integrity in >1 GΩ source impedance circuits like photodiode transimpedance stages. |
| Output Voltage Swing | Rail-to-rail: VOL = 40 mV max, VOH = 15.96 V min at 16 V supply and 1 mA load; maximizes dynamic range for 12-bit+ ADCs. |
| Channel Separation | −115 dB at 10 kHz; prevents crosstalk between channels in multi-sensor acquisition systems. |
| Operating Temperature | −40°C to +125°C; qualified per AEC-Q100 for engine control, battery monitoring, and ADAS sensor modules. |
Pinout & Package
AD8668WARUZ-R7 is housed in a 14-lead TSSOP (RU-14) package with 0.65 mm lead pitch, 5.00 mm × 4.40 mm body size, and JEDEC MO-153-AB-1 compliance. Thermal resistance θJA = 180°C/W enables operation at full rating without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output; drives low-impedance loads up to ±140 mA short-circuit current capability. |
| 2 | –IN A | Inverting input of Amplifier A; matched to +IN A for <70 pA input offset current across temperature. |
| 3 | +IN A | Non-inverting input of Amplifier A; accepts common-mode voltage from −0.1 V to +14.0 V at 16 V supply. |
| 4 | V– | Negative supply rail; tied to GND in single-supply mode; supports dual ±2.5 V to ±8 V operation. |
| 5 | OUT D | Amplifier D output; electrically isolated from other outputs with −115 dB channel separation at 10 kHz. |
| 6 | –IN D | Inverting input of Amplifier D; independent bias path ensures <550 pA max IB over full temperature range. |
| 7 | +IN D | Non-inverting input of Amplifier D; identical input voltage range and CMRR spec as pins 2 and 3. |
| 8 | V+ | Positive supply rail; accepts 5 V to 16 V; PSRR >98 dB minimizes supply ripple coupling into output. |
| 9 | +IN B | Non-inverting input of Amplifier B; shares same input structure and noise performance as all channels. |
| 10 | +IN C | Non-inverting input of Amplifier C; enables simultaneous 4-channel synchronous sampling in data acquisition. |
| 11 | –IN B | Inverting input of Amplifier B; pin-compatible with industry-standard quad op-amp layouts. |
| 12 | OUT B | Amplifier B output; rail-to-rail swing allows direct connection to SAR ADC reference buffers. |
| 13 | –IN C | Inverting input of Amplifier C; matched pair with +IN C for precision differential signal conditioning. |
| 14 | OUT C | Amplifier C output; supports 100 kHz small-signal transient response with <10% overshoot into 100 pF load. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Drives within 40 mV of V– and 40 mV of V+ at 1 mA load, preserving >98% of full-scale ADC input range. |
| Automotive qualification | AEC-Q100 Grade 1 certified (−40°C to +125°C), with controlled manufacturing and reliability reporting for safety-critical systems. |
| Low input bias current | ≤1 pA at 25°C enables use with >10 GΩ source impedances without significant DC error or drift. |
| High PSRR/CMRR | ≥115 dB PSRR and ≥110 dB CMRR at DC ensure immunity to battery ripple and EMI in vehicle harnesses. |
| No output phase reversal | Guaranteed operation without polarity inversion when inputs exceed supply rails-critical for fault-tolerant sensor interfaces. |
Applications
| Photodiode Signal Amplification | Automotive Battery Monitoring |
|---|---|
Use Scenario: Converting weak current from silicon photodiodes in cabin ambient light sensors or rain/light detection modules. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1 pA input bias current minimizing dark current error and 8 nV/√Hz noise preserving SNR. Use Value: Enables detection of <100 nA photocurrents with <1 μV RMS noise floor, supporting high-dynamic-range auto-dimming mirrors. |
Use Scenario: Precision voltage sensing across 12 V lead-acid or 48 V Li-ion battery stacks in start-stop and mild-hybrid vehicles. IC Role / Device Role / Timing Role: High-common-mode rejection buffer feeding 16-bit SAR ADCs; rejects >110 dB of alternator ripple. Use Value: Achieves ±1 mV absolute accuracy over temperature, enabling accurate state-of-charge estimation and cell balancing control. |
| Medical ECG Front-End | Industrial Reference Buffering |
Use Scenario: Amplifying microvolt-level biopotential signals from dry-electrode ECG patches in portable patient monitors. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer with rail-to-rail output driving anti-alias filters. Use Value: Delivers <2.5 μV p-p 0.1–10 Hz noise and 5 mV max offset drift, meeting IEC 60601-2-27 low-noise requirements. |
Use Scenario: Buffering precision voltage references (e.g., REF5025) in programmable logic controller analog output modules. IC Role / Device Role / Timing Role: Low-drift, high-PSRR unity-gain follower isolating reference from DAC load transients. Use Value: Maintains <0.5 ppm/°C reference stability under 10 mA load steps, ensuring ±0.01% FSR accuracy in 16-bit DAC systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8668ARUZ | Same die, commercial grade (−40°C to +125°C) without AEC-Q100 automotive qualification or extended reliability testing. | Suitable for industrial and medical equipment where automotive qualification is not required. | Select AD8668ARUZ for cost-sensitive non-automotive designs needing identical electrical specs but no automotive traceability. |
| TSV914IQ4T | Quad rail-to-rail op-amp with 8 MHz GBP, 1.1 V/μs slew rate, 1.1 mV max VOS, but only rated to +105°C and lacks AEC-Q100 certification. | Used in consumer audio and general-purpose industrial signal conditioning, not automotive safety systems. | Choose TSV914IQ4T only for non-automotive applications requiring higher bandwidth and lower offset, accepting reduced temperature range and no automotive qualification. |
Compared with AD8668ARUZ, AD8668WARUZ-R7 adds AEC-Q100 qualification and enhanced reliability reporting for automotive use, while TSV914IQ4T trades automotive compliance for higher speed and lower offset in commercial applications-neither is pin-compatible nor drop-in replaceable without validation.
Availability
AD8668WARUZ-R7 is available at Aetrix Electronics and suitable for automotive battery management, medical ECG front-ends, and industrial reference buffering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8668WARUZ-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 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 AD866x product line delivers precision CMOS op-amps targeting high-impedance sensor interfaces and automotive subsystems where low bias current, rail-to-rail output, and extended temperature operation are mandatory.
FAQ
What is the maximum supply voltage for AD8668WARUZ-R7?
The AD8668WARUZ-R7 supports a maximum supply voltage of 18 V absolute maximum rating, with recommended continuous operation from 5 V to 16 V. At 16 V supply, it delivers rail-to-rail output swing with VOH ≥15.94 V and VOL ≤40 mV at 1 mA load, making it ideal for 12 V automotive systems with headroom for transients.
Is AD8668WARUZ-R7 pin-compatible with standard quad op-amp footprints?
Yes, AD8668WARUZ-R7 uses a 14-lead TSSOP (RU-14) package with JEDEC MO-153-AB-1 outline, matching industry-standard quad op-amp pinouts including IN+/IN−/OUT per channel and shared V+/V− rails. Pin 1 is OUT A, and pin 8 is V+, aligning with common layout practices for signal routing and thermal management.
Does AD8668WARUZ-R7 support dual-supply operation?
Yes, AD8668WARUZ-R7 operates from ±2.5 V to ±8 V dual supplies. Its input common-mode range extends to −0.1 V below V– and +14.0 V above V– at 16 V total supply, and its rail-to-rail output delivers full swing relative to both rails-enabling flexible design in split-rail systems such as audio line drivers and bipolar sensor interfaces.
What is the typical input voltage noise density of AD8668WARUZ-R7?
The AD8668WARUZ-R7 has a typical input voltage noise density of 8 nV/√Hz at 10 kHz and 10 nV/√Hz at 1 kHz. This low noise performance, combined with 1 pA input bias current, makes it especially effective in high-gain, high-impedance applications like photodiode transimpedance amplifiers and precision medical sensor front-ends.
How does the automotive qualification of AD8668WARUZ-R7 differ from the commercial AD8668ARUZ?
AD8668WARUZ-R7 undergoes controlled manufacturing, extended reliability stress testing (HTOL, TC, UHAST), and AEC-Q100 Grade 1 qualification (−40°C to +125°C), with full traceability and automotive-specific failure analysis. AD8668ARUZ meets the same electrical specs but lacks these automotive-specific validations and documentation packages required for Tier 1 automotive programs.
AD8668WARUZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 3.5V/µs
- Gain Bandwidth Product:
- 4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 600 µV
- Current - Supply:
- 1.15mA (x4 Channels)
- Current - Output / Channel:
- 140 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
AD8668WARUZ-R7 FAQ
1.How can I place an order for AD8668WARUZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8668WARUZ-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 AD8668WARUZ-R7 reliable?
The price and inventory of AD8668WARUZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8668WARUZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8668WARUZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8668WARUZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8668WARUZ-R7?
AD8668WARUZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8668WARUZ-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 AD8668WARUZ-R7?
For technical support, including AD8668WARUZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8668WARUZ-R7 requirements.
6.How does Aetrix verify that AD8668WARUZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8668WARUZ-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 AD8668WARUZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8668WARUZ-R7?
All AD8668WARUZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8668WARUZ-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 AD8668WARUZ-R7 part is unused and in its original packaging.
Return procedure for AD8668WARUZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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