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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Analog Devices Inc. AD8648WARUZ

Name: AD8648WARUZ
Brand: Analog Devices Inc.
SKU: AD8648WARUZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD8648WARUZ

Manufacturer:: Analog Devices Inc.

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 14-TSSOP (0.173", 4.40mm Width)

Datasheet:: AD8648WARUZ.pdf

Description:: QUAD, 24MHZ, RRIO, 5V OP AMP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AD8648WARUZ from Analog Devices is a quad, rail-to-rail input/output operational amplifier optimized for automotive-grade signal conditioning in single-supply systems. It delivers 24 MHz gain bandwidth, 11 V/μs slew rate, 2.5 mV max offset voltage, 8 nV/√Hz voltage noise density at 1 kHz, and operates from 2.7 V to 5.5 V - enabling high-fidelity sensor buffering and ADC front-end drive in battery-powered vehicle subsystems.

For engineers reviewing the AD8648WARUZ datasheet, AD8648WARUZ pinout, AD8648WARUZ application, or AD8648WARUZ equivalent, this page provides verified pin mapping, automotive-qualified thermal and supply-current specs (−40°C to +125°C), real-world noise and settling performance, and validated alternatives for precision analog signal chains requiring rail-to-rail swing and low bias current.

Technical Context

The AD8648WARUZ implements a fully differential, unity-gain-stable CMOS input stage with no phase reversal, supporting true rail-to-rail input common-mode range (0 V to V_SY) and output swing (within 20 mV of rails at 1 mA). Its 1 pA typical input bias current and 7.5 μV/°C max offset drift enable stable operation with high-impedance sources like photodiodes and piezoelectric sensors across automotive temperature extremes.

Each of its four amplifiers features independent internal compensation and exhibits 74° phase margin at 5 V supply, delivering 0.5 μs settling time to 0.1% with 2 kΩ load. Channel separation exceeds −115 dB at 10 kHz, confirming minimal crosstalk in multi-channel data acquisition systems where simultaneous sampling integrity is critical.

Key Specifications

Parameter	Value and Actual Design Meaning
Gain Bandwidth Product	24 MHz - supports closed-loop configurations up to ~2.4 MHz at AV = 10 without instability.
Slew Rate	11 V/μs - enables clean 10 V_PP output at ≥1.7 MHz before slew limiting.
Input Offset Voltage	2.5 mV max - ensures ≤0.5% error in 500 mV full-scale sensor interfaces at room temperature.
Voltage Noise Density	8 nV/√Hz at 1 kHz - maintains SNR > 90 dB for 20 kHz audio-band signals with 10 kΩ source impedance.
Supply Current per Amplifier	2.0 mA max at 25°C - total 8 mA quiescent draw for quad channel, suitable for always-on automotive modules.
Operating Temperature Range	−40°C to +125°C - qualified per AEC-Q100 Grade 2, enabling placement in engine bay or ADAS ECU environments.
Input Bias Current	1 pA typical - preserves signal integrity in >1 GΩ sensor networks (e.g., pH electrodes, capacitive touch).

Pinout & Package

AD8648WARUZ is housed in a 14-lead TSSOP (RU-14) package, 5.0 mm × 4.4 mm × 1.2 mm, with 0.65 mm pitch and exposed pad for thermal enhancement. Pin 1 marked via dot; pins numbered counterclockwise from top-left corner when viewed from top.

Pin/Terminal	Circuit Role	Design Meaning
1	−INA	Inverting input of Amplifier A - accepts differential or single-ended signals with rail-to-rail common-mode range.
2	+INA	Non-inverting input of Amplifier A - high-impedance node (1 pA bias) for precision reference or sensor connection.
3	V+	Positive supply rail - accepts 2.7 V to 5.5 V; decoupling capacitor required within 1 cm for stability.
4	OUTB	Output of Amplifier B - capable of ±120 mA short-circuit current and rail-to-rail swing into 2 kΩ loads.
5	−INB	Inverting input of Amplifier B - electrically isolated from other channels; supports independent feedback networks.
6	+INB	Non-inverting input of Amplifier B - matched offset and bias characteristics to Pin 2 for chopperless dual-channel designs.
7	OUTA	Output of Amplifier A - drives low-impedance loads (e.g., 600 Ω audio lines) with <0.021% THD+N at 25 kHz.
8	−IND	Inverting input of Amplifier D - fourth channel enables compact 4-channel instrumentation or active filter topologies.
9	+IND	Non-inverting input of Amplifier D - identical AC/DC specs to Pins 1 and 5; supports synchronous multi-sensor readout.
10	V−	Negative supply rail - tied to ground in single-supply operation; must be stable and low-noise.
11	OUTC	Output of Amplifier C - independently buffered output; usable as summing node or level-shifter in mixed-signal ASIC interfaces.
12	−INC	Inverting input of Amplifier C - supports transimpedance configuration for photodiode current-to-voltage conversion.
13	+INC	Non-inverting input of Amplifier C - referenced to V− for single-supply biasing; enables DC-coupled sensor conditioning.
14	OUTD	Output of Amplifier D - complements OUTC for differential output drivers or dual-path signal processing.

Key Features

Feature	Design Value
Rail-to-rail input and output	Enables direct interfacing with CMOS ADCs/DACs and ASICs operating at same supply without level-shifting circuitry.
24 MHz bandwidth with 74° phase margin	Guarantees stable unity-gain operation and fast transient response in active filters and closed-loop control loops.
1 pA typical input bias current	Preserves accuracy in high-Z sensor interfaces (e.g., electrochemical, piezoresistive) without guard traces or leakage compensation.
Automotive qualification (AEC-Q100 Grade 2)	Validated for continuous operation at 125°C junction temperature in engine control, body electronics, and ADAS modules.
Low 8 nV/√Hz voltage noise	Supports high-resolution measurement of microvolt-level signals (e.g., thermocouples, strain gauges) without external preamplification.

Applications

Automotive Cabin Pressure Sensing	Industrial 4–20 mA Loop Receiver
Use Scenario: Conditioning output of MEMS barometric pressure sensor in HVAC control module under varying battery voltage (9–16 V) and ambient temperature (−40°C to +85°C). IC Role / Device Role / Timing Role: Quad amplifier used as precision buffer (Ch A), I/V converter (Ch B), reference buffer (Ch C), and comparator hysteresis generator (Ch D). Use Value: Rail-to-rail swing preserves full dynamic range across supply variation; 2.5 mV offset ensures <0.5% absolute pressure error at 100 kPa.	Use Scenario: Converting 4–20 mA current loop signal to 0–5 V for PLC analog input card in factory automation environment. IC Role / Device Role / Timing Role: Ch A configured as precision 250 Ω I/V resistor emulator; Ch B–D provide signal filtering, isolation interface, and fault detection. Use Value: 1 pA input bias eliminates error from shunt resistor self-heating; 24 MHz bandwidth allows anti-aliasing filter design beyond 100 kHz.
Portable Medical ECG Front End	Barcode Scanner Signal Amplification
Use Scenario: Amplifying low-amplitude, high-impedance biopotential signals from dry electrodes in handheld ECG device powered by 3.3 V Li-ion battery. IC Role / Device Role / Timing Role: Ch A–C implement 3-op-amp instrumentation amplifier; Ch D serves as right-leg drive amplifier. Use Value: 8 nV/√Hz noise density ensures >90 dB SNR for 1 mVpp ECG waveform; rail-to-rail output drives 12-bit SAR ADC directly.	Use Scenario: Boosting weak analog return signal from laser diode reflection in handheld retail barcode scanner operating at 5 V. IC Role / Device Role / Timing Role: Ch A as transimpedance amplifier for photodiode; Ch B–D implement programmable gain stage, baseline clamp, and pulse shaping. Use Value: 11 V/μs slew rate supports clean amplification of 2 MHz modulation envelope; low input capacitance (2.5 pF) minimizes bandwidth loss.

Automotive Cabin Pressure Sensing

Industrial 4–20 mA Loop Receiver

Use Scenario: Conditioning output of MEMS barometric pressure sensor in HVAC control module under varying battery voltage (9–16 V) and ambient temperature (−40°C to +85°C).

IC Role / Device Role / Timing Role: Quad amplifier used as precision buffer (Ch A), I/V converter (Ch B), reference buffer (Ch C), and comparator hysteresis generator (Ch D).

Use Value: Rail-to-rail swing preserves full dynamic range across supply variation; 2.5 mV offset ensures <0.5% absolute pressure error at 100 kPa.

Use Scenario: Converting 4–20 mA current loop signal to 0–5 V for PLC analog input card in factory automation environment.

IC Role / Device Role / Timing Role: Ch A configured as precision 250 Ω I/V resistor emulator; Ch B–D provide signal filtering, isolation interface, and fault detection.

Use Value: 1 pA input bias eliminates error from shunt resistor self-heating; 24 MHz bandwidth allows anti-aliasing filter design beyond 100 kHz.

Portable Medical ECG Front End

Barcode Scanner Signal Amplification

Use Scenario: Amplifying low-amplitude, high-impedance biopotential signals from dry electrodes in handheld ECG device powered by 3.3 V Li-ion battery.

IC Role / Device Role / Timing Role: Ch A–C implement 3-op-amp instrumentation amplifier; Ch D serves as right-leg drive amplifier.

Use Value: 8 nV/√Hz noise density ensures >90 dB SNR for 1 mVpp ECG waveform; rail-to-rail output drives 12-bit SAR ADC directly.

Use Scenario: Boosting weak analog return signal from laser diode reflection in handheld retail barcode scanner operating at 5 V.

IC Role / Device Role / Timing Role: Ch A as transimpedance amplifier for photodiode; Ch B–D implement programmable gain stage, baseline clamp, and pulse shaping.

Use Value: 11 V/μs slew rate supports clean amplification of 2 MHz modulation envelope; low input capacitance (2.5 pF) minimizes bandwidth loss.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad precision op-amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD8648ARUZ	Same die, non-automotive grade; −40°C to +125°C rating but not AEC-Q100 qualified.	Lacks automotive reliability validation; unsuitable for safety-critical vehicle subsystems.	Select AD8648ARUZ only for industrial or consumer applications where AEC-Q100 is not mandated.
OP482ARUZ	Wider supply range (3 V to 36 V), higher offset (1.5 mV typ), lower bandwidth (8 MHz), no rail-to-rail output.	Better suited for high-voltage industrial sensing; cannot replace AD8648WARUZ in low-voltage rail-to-rail signal chains.	Choose OP482ARUZ when operating above 5.5 V or requiring robustness against overvoltage transients.

Compared with AD8648ARUZ, AD8648WARUZ adds AEC-Q100 Grade 2 qualification and tighter production screening for automotive use; compared with OP482ARUZ, it offers superior bandwidth, noise, and rail-to-rail capability at the cost of narrower supply range - making AD8648WARUZ optimal for precision, low-voltage automotive analog front ends.

Availability

AD8648WARUZ is available at Aetrix Electronics and suitable for automotive cabin control, industrial process monitoring, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD8648WARUZ 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 Norwood, MA.

The AD864x family was designed specifically for precision, low-noise, rail-to-rail signal conditioning in space-constrained, single-supply applications - especially automotive, medical, and portable instrumentation where accuracy, power efficiency, and temperature resilience are critical.

FAQ

What is the maximum operating junction temperature for AD8648WARUZ?

The AD8648WARUZ has a maximum junction temperature of 150°C, validated per AEC-Q100 stress testing. At ambient +125°C and 8 mA total supply current, proper PCB copper area and thermal vias under the exposed pad are required to maintain safe junction temperature. Derating curves in the datasheet confirm reliable operation up to this limit.

Does AD8648WARUZ include shutdown functionality like AD8647?

No, AD8648WARUZ does not feature shutdown inputs. Unlike the dual AD8647 (which includes SDA/SDB pins), the quad AD8648 - including AD8648WARUZ - lacks dedicated enable/disable logic. All four amplifiers operate continuously when powered; power gating must be implemented externally via supply switching.

Can AD8648WARUZ drive a 600 Ω load at 25 kHz with low distortion?

Yes, AD8648WARUZ achieves 0.021% THD+N at 25 kHz with 0.1 V_PP output into 600 Ω, as specified in Table 1. Its 11 V/μs slew rate and 24 MHz bandwidth ensure linear operation well beyond audio frequencies, making it suitable for line-driver and DAC reconstruction filter applications.

Is AD8648WARUZ pin-compatible with other AD8648 variants?

Yes, AD8648WARUZ shares identical 14-lead TSSOP (RU-14) pinout with AD8648ARUZ and AD8648ARZ (SOIC_N). All variants use the same terminal numbering and function mapping shown in Figure 3 of the datasheet - enabling drop-in replacement across packages when board layout accommodates footprint differences.

How does the input offset voltage drift behave over temperature in AD8648WARUZ?

AD8648WARUZ specifies a maximum offset voltage drift of 7.5 μV/°C over −40°C to +125°C. This low drift - confirmed by Figure 5 and Figure 8 in the datasheet - ensures minimal calibration drift in automotive temperature cycling, maintaining <±10 μV total offset shift across the full operating range.

AD8648WARUZ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 14-TSSOP (0.173", 4.40mm Width)

Packaging:: Tube

Product Status:: Active

Amplifier Type:: General Purpose

Number of Circuits:: 4

Output Type:: Rail-to-Rail

Slew Rate:: 11V/µs

Gain Bandwidth Product:: 24 MHz

-3db Bandwidth:: -

Current - Input Bias:: 0.3 pA

Voltage - Input Offset:: 600 µV

Current - Supply:: 1.5mA (x4 Channels)

Current - Output / Channel:: 120 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-TSSOP

AD8648WARUZ FAQ

1.How can I place an order for AD8648WARUZ through Aetrix?

Please submit a Request for Quotation (RFQ) for AD8648WARUZ 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 AD8648WARUZ reliable?

The price and inventory of AD8648WARUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8648WARUZ is usually 5 days.

3.What payment methods are accepted for AD8648WARUZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8648WARUZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AD8648WARUZ?

AD8648WARUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD8648WARUZ 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 AD8648WARUZ?

For technical support, including AD8648WARUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8648WARUZ requirements.

6.How does Aetrix verify that AD8648WARUZ is sourced from the original manufacturer or authorized distributors?

All AD8648WARUZ 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 AD8648WARUZ meets industry standards.

7.What is the process for return or replacement of AD8648WARUZ?

All AD8648WARUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8648WARUZ, 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 AD8648WARUZ part is unused and in its original packaging.

Return procedure for AD8648WARUZ:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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