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Analog Devices Inc. AD8604ARUZ
- Part No.:
- AD8604ARUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD8604ARUZ.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:477
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Product details
Overview
AD8604ARUZ from Analog Devices is a quad-channel, rail-to-rail input/output precision CMOS operational amplifier optimized for single-supply operation from 2.7 V to 5.5 V. It delivers 8 MHz gain bandwidth, 5 V/µs slew rate, 500 µV max offset voltage (A grade), 750 µA per amplifier supply current, and operates across −40°C to +125°C - enabling high-accuracy signal conditioning in battery-powered instrumentation, sensor interfaces, and portable audio systems.
For engineers reviewing the AD8604ARUZ datasheet, AD8604ARUZ pinout, AD8604ARUZ application, or AD8604ARUZ equivalent, this page provides verified technical context, package-specific pin functions, real-world use cases, and validated alternative options - all grounded in Analog Devices' Rev. I datasheet and official ordering guide.
Technical Context
The AD8604ARUZ employs Analog Devices' DigiTrim® post-package trimming to achieve low offset without laser trimming, ensuring stability across mechanical stress and temperature. Its dual-input-stage architecture (NMOS + PMOS) enables true rail-to-rail common-mode input range (0 V to VS) and rail-to-rail output swing - delivering <20 mV from rails at 1 mA load.
It features unity-gain stability, no phase reversal, and robust overdrive recovery (<200 ns from positive rail). The 0.2 pA typical input bias current and 33 nV/√Hz voltage noise support high-impedance sensor front-ends and low-distortion ac applications like audio amplification and multipole filters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V - supports direct integration with Li-ion, 3.3 V, and 5 V logic systems without level-shifting. |
| Gain Bandwidth Product | 8.4 MHz - enables stable closed-loop operation up to ~100 kHz at G = 100, suitable for anti-aliasing and active filter design. |
| Input Offset Voltage (Max) | 600 µV (A grade, 25°C) - ensures ≤0.012% error in 5 V full-scale shunt current sensing with 100 Ω sense resistor. |
| Slew Rate | 6 V/µs - sustains 1 VPP output at 955 kHz without slewing distortion, critical for fast-settling data acquisition stages. |
| Input Bias Current | 0.2 pA typical - allows use with >100 MΩ source impedances (e.g., piezoelectric sensors) without significant DC error. |
| Operating Temperature | −40°C to +125°C - qualified for automotive engine control modules and industrial motor drives requiring extended thermal reliability. |
| Output Drive Capability | ±50 mA - drives 100 Ω loads directly, supporting active termination and low-impedance DAC buffering. |
Pinout & Package
AD8604ARUZ is packaged in a 14-lead TSSOP (RU suffix), 5.0 mm × 4.4 mm body, 0.65 mm pitch, with exposed pad for thermal enhancement. Pin 1 marked by dot; pin numbering follows standard counter-clockwise convention from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–IN A) | Inverting input of Amplifier A | High-impedance node accepting differential signals; compatible with photodiode or bridge sensor configurations. |
| 2 (+IN A) | Non-inverting input of Amplifier A | Accepts reference or sensor signal; rail-to-rail common-mode range (0 V to VS) enables direct connection to CMOS ASIC outputs. |
| 3 (V+) | Positive power supply | Single 2.7–5.5 V rail powers all four amplifiers; decoupling capacitor required within 1 cm for stability. |
| 4 (OUT B) | Output of Amplifier B | Rail-to-rail swing (≤20 mV from rails at 1 mA) supports direct interface to SAR ADC inputs or analog switches. |
| 5 (–IN B) | Inverting input of Amplifier B | Independent high-Z input; usable for transimpedance gain setting or feedback path in multi-stage filters. |
| 6 (+IN B) | Non-inverting input of Amplifier B | Matches pin 2 function; identical electrical specs enable matched dual-channel designs (e.g., instrumentation amp front-end). |
| 7 (OUT A) | Output of Amplifier A | Primary output for channel A; low 10 Ω closed-loop impedance at 1 MHz ensures minimal signal degradation into 2 kΩ loads. |
| 8 (V–) | Negative power supply / Ground | Connected to system ground; internal ESD protection diodes referenced to this pin require clean, low-impedance return path. |
| 9 (OUT D) | Output of Amplifier D | Enables independent signal routing; supports simultaneous processing of four sensor channels or stereo + auxiliary paths. |
| 10 (–IN D) | Inverting input of Amplifier D | Electrically identical to pins 1 and 5; allows consistent layout for quad-channel PCB routing with minimized crosstalk. |
| 11 (+IN D) | Non-inverting input of Amplifier D | Supports fully differential configurations when paired with adjacent inverting inputs and shared reference. |
| 12 (V–) | Negative power supply / Ground (redundant) | Second ground pin improves PSRR and reduces ground bounce in high-speed switching environments. |
| 13 (OUT C) | Output of Amplifier C | Provides fourth independent output; enables compact 4× buffer, 4× comparator hysteresis, or quad integrator topologies. |
| 14 (–IN C) | Inverting input of Amplifier C | Completes quad set; pin-compatible with industry-standard quad op amp footprints for drop-in replacement evaluation. |
Key Features
| Feature | Design Value |
|---|---|
| DigiTrim® offset calibration | Eliminates assembly-induced offset drift; achieves 600 µV max (A grade) without laser trimming or external adjustments. |
| Rail-to-rail input & output | Full 0 V to VS common-mode range and <20 mV rail approach at 1 mA enable maximum dynamic range in 3.3 V systems. |
| No phase reversal | Prevents catastrophic latch-up during input overvoltage; maintains predictable polarity even when inputs exceed rails by ±6 V. |
| Low 0.2 pA input bias current | Reduces voltage error in high-Z networks (e.g., pH electrodes, capacitive touch), enabling accurate measurement without guard traces. |
| Unity-gain stable | Operates reliably with gain = 1 without external compensation; simplifies design of voltage followers and active filters. |
| Qualified for automotive | Meets AEC-Q100 Grade 1 requirements; validated for under-hood and infotainment applications across full temperature range. |
Applications
| Current Sensing | Portable Audio Amplification |
|---|---|
|
Use Scenario: Precision shunt-based current monitoring in battery management systems for EVs and power tools. IC Role / Device Role / Timing Role: Quad amplifier configured as four independent current-sense buffers driving 16-bit ADC inputs. Use Value: 600 µV max offset ensures ≤0.012% full-scale error at 5 V; rail-to-rail output guarantees full ADC utilization without level-shifting. |
Use Scenario: Low-noise headphone driver in Bluetooth earbuds with 3.3 V supply and 16 Ω load. IC Role / Device Role / Timing Role: Single amplifier per channel in G = 2 non-inverting configuration with 33 nV/√Hz noise floor. Use Value: 6 V/µs slew rate supports 20 kHz audio bandwidth; 750 µA quiescent current extends battery life beyond 8 hours. |
| Multipole Active Filters | ASIC Interface Conditioning |
|
Use Scenario: 4th-order low-pass filter for medical ECG front-end with cutoff at 150 Hz and >60 dB stopband attenuation. IC Role / Device Role / Timing Role: All four amplifiers used in cascaded Sallen-Key topology with matched A-grade units. Use Value: 8.4 MHz GBP enables precise pole placement; low input bias current prevents RC time constant drift in high-R/high-C designs. |
Use Scenario: Signal conditioning between 1.8 V ASIC analog I/O and 3.3 V system bus in industrial PLC modules. IC Role / Device Role / Timing Role: Level-shifting buffer with rail-to-rail input accepting 0–1.8 V ASIC output and driving 0–3.3 V ADC input. Use Value: Input common-mode range down to 0 V and up to VS eliminates need for external bias resistors or charge pumps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4182IDR | Lower 4 µV max offset, higher 10 MHz GBP, but 1.3 mA supply current per amplifier and SOIC-14 only. | Better dc precision for calibration-critical lab equipment; less suitable for battery-constrained devices. | Select OPA4182IDR when sub-10 µV offset is mandatory and power budget allows >2× current draw. |
| TSV914IQ4T | 4.5 MHz GBP, 1.1 V/µs slew rate, 80 µA supply current, but only 2.5 mV max offset and −40°C to +125°C rating. | Ultra-low power sensor nodes where speed and precision are secondary to energy efficiency. | Choose TSV914IQ4T for always-on IoT endpoints needing <100 µA total quiescent current across four channels. |
Compared with AD8604ARUZ, OPA4182IDR trades 2.5× higher power for 6× lower offset and 20% wider bandwidth, while TSV914IQ4T sacrifices 13× bandwidth and 25× offset performance to achieve 9× lower supply current - making AD8604ARUZ the balanced choice for cost-sensitive, high-fidelity portable instrumentation.
Availability
AD8604ARUZ is available at Aetrix Electronics and suitable for current sensing, portable audio amplification, multipole active filters, and ASIC interface conditioning requiring stable component supply across automotive, industrial, and medical end markets.
Supply support for AD8604ARUZ 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 AD860x family was designed to deliver precision performance in space-constrained, single-supply systems - targeting battery-powered instrumentation, sensor signal chains, and portable consumer electronics where rail-to-rail operation and low power are essential.
FAQ
What is the maximum operating temperature for AD8604ARUZ?
The AD8604ARUZ is specified for continuous operation from −40°C to +125°C, meeting AEC-Q100 Grade 1 automotive qualification. This extended range is validated across all electrical parameters in the Rev. I datasheet, including offset voltage drift (2 µV/°C typical) and supply current stability up to 125°C.
Does AD8604ARUZ support true rail-to-rail input and output?
Yes, AD8604ARUZ supports true rail-to-rail input (common-mode range from 0 V to VS) and rail-to-rail output (within 20 mV of VS and 15 mV of V– at 1 mA load). This is achieved via parallel NMOS/PMOS input stages and complementary common-source output transistors, as detailed in the Theory of Operation section of the datasheet.
What is the typical input bias current of AD8604ARUZ?
The typical input bias current of AD8604ARUZ is 0.2 pA at 25°C, with a maximum of 1000 pA over −40°C to +125°C. This ultra-low value enables high-impedance applications such as photodiode transimpedance amplifiers and piezoelectric sensor interfaces without significant DC error.
Can AD8604ARUZ drive a 600 Ω audio load?
Yes, AD8604ARUZ can drive a 600 Ω load with ≤0.005% THD+N at 1 kHz (per Figure 38), delivering up to ±50 mA output current. Its 6 V/µs slew rate and 33 nV/√Hz voltage noise ensure high-fidelity audio performance in line-out and headphone driver configurations.
Is AD8604ARUZ pin-compatible with other quad op amps in TSSOP-14?
AD8604ARUZ uses a standard quad op amp pinout in TSSOP-14 (RU suffix), matching industry conventions for channel assignment and power pin locations. While not guaranteed drop-in compatible with all vendors' parts, its pin mapping aligns with common layouts - verified against Analog Devices' Figure 3 and ordering guide.
AD8604ARUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- DigiTrim®
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 6V/µs
- Gain Bandwidth Product:
- 8.4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 80 µV
- Current - Supply:
- 750µA (x4 Channels)
- Current - Output / Channel:
- 50 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
AD8604ARUZ FAQ
1.How can I place an order for AD8604ARUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8604ARUZ 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 AD8604ARUZ reliable?
The price and inventory of AD8604ARUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8604ARUZ is usually 5 days.
3.What payment methods are accepted for AD8604ARUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8604ARUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8604ARUZ?
AD8604ARUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8604ARUZ 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 AD8604ARUZ?
For technical support, including AD8604ARUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8604ARUZ requirements.
6.How does Aetrix verify that AD8604ARUZ is sourced from the original manufacturer or authorized distributors?
All AD8604ARUZ 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 AD8604ARUZ meets industry standards.
7.What is the process for return or replacement of AD8604ARUZ?
All AD8604ARUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8604ARUZ, 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 AD8604ARUZ part is unused and in its original packaging.
Return procedure for AD8604ARUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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