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Analog Devices Inc. AD8604WARZ
- Part No.:
- AD8604WARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8604WARZ.pdf
- Description:
- QUAD RRIO CMOS OP AMP
- Quantity:
- Payment:
- Shipping:
Inventory:219
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Product details
Overview
AD8604WARZ 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 and sensor interfaces.
For engineers reviewing the AD8604WARZ datasheet, AD8604WARZ pinout, AD8604WARZ application, or AD8604WARZ equivalent, this page provides verified technical context, package-specific pin functions, real-world use cases in current sensing and audio buffering, and two validated alternative parts with documented functional and application-level differences.
Technical Context
The AD8604WARZ 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 differential pairs) enables true rail-to-rail common-mode input range (0 V to VS) and eliminates phase reversal - critical for interfacing with CMOS ADCs and ASICs in single-supply systems.
Output stage uses complementary NMOS/PMOS common-source configuration delivering rail-to-rail swing: within 20 mV of VS and 15 mV of ground at 1 mA load. Open-loop gain is 80 dB typical (RL = 2 kΩ), with gain-bandwidth product tightly specified at 8.2–8.4 MHz and phase margin ≥50°, supporting stable unity-gain and high-speed closed-loop configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V - supports direct connection to Li-ion, 3.3 V, and 5 V rails without level-shifting. |
| Offset Voltage (Max, A Grade) | 600 µV at 25°C, VCM = 0–3 V - ensures ≤0.012% error in 5 V full-scale shunt current sensing. |
| Gain Bandwidth Product | 8.4 MHz - enables stable 10× gain up to ~800 kHz or unity-gain buffer for 10-bit+ ADC sampling clocks. |
| Slew Rate | 6 V/µs at 5 V supply - supports clean 1 VPP output at 1 MHz without slewing distortion. |
| Input Bias Current | 0.2 pA typical - preserves signal integrity in >100 MΩ source impedance circuits (e.g., photodiode amps). |
| Operating Temperature | −40°C to +125°C - qualified for automotive under-hood and industrial motor control environments. |
| Quiescent Current | 750 µA per amplifier - allows four channels to operate on <3.3 mW total at 3.3 V, ideal for portable devices. |
Pinout & Package
AD8604WARZ is packaged in a 14-lead TSSOP (RU suffix), 5.0 mm × 4.4 mm × 1.2 mm body, 0.65 mm pitch, moisture sensitivity level 1 (MSL1), lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−IN A) | Inverting input of Amplifier A | High-impedance node (0.2 pA bias); accepts signals from 0 V to VS; requires no external clamping for rail-to-rail operation. |
| 2 (+IN A) | Non-inverting input of Amplifier A | Matches −IN A in offset and CMRR; used for precision reference buffering or sensor excitation. |
| 3 (V+) | Positive power supply | Accepts 2.7–5.5 V; decoupling capacitor (0.1 µF) required within 5 mm for stability at >1 MHz. |
| 4 (OUT B) | Output of Amplifier B | Rail-to-rail capable: drives ±30 mA; settles to 0.01% in <1.0 µs; supports direct DAC output buffering. |
| 5 (−IN B) | Inverting input of Amplifier B | Electrically identical to Pin 1; enables independent feedback paths for multi-stage filtering. |
| 6 (+IN B) | Non-inverting input of Amplifier B | Used for differential-to-single-ended conversion or as reference input in active filters. |
| 7 (OUT A) | Output of Amplifier A | Primary output channel; low 10 Ω closed-loop impedance at 1 MHz enables driving 2 kΩ loads with minimal gain loss. |
| 8 (V−) | Negative power supply / Ground | Must be connected to system ground; serves as return path for all four amplifiers' quiescent and output currents. |
| 9 (OUT D) | Output of Amplifier D | Supports simultaneous high-speed signal paths (e.g., stereo audio + sensor sync + reference buffer). |
| 10 (−IN D) | Inverting input of Amplifier D | Enables fourth independent gain stage; matched performance to Pins 1 and 5 ensures channel-to-channel tracking. |
| 11 (+IN D) | Non-inverting input of Amplifier D | Used for precision voltage monitoring (e.g., battery voltage scaling) with guaranteed 74 dB CMRR at 5 V. |
| 12 (V−) | Negative power supply / Ground (redundant) | Second ground pin reduces PCB trace inductance; must be tied to same ground plane as Pin 8. |
| 13 (OUT C) | Output of Amplifier C | Delivers full rail-to-rail swing even at 10 mA load (VOL = 125 mV, VOH = 4.7 V @ 5 V). |
| 14 (−IN C) | Inverting input of Amplifier C | Validated for high-side current sensing with bidirectional shunt amplification (no phase reversal). |
Key Features
| Feature | Design Value |
|---|---|
| DigiTrim® offset calibration | Eliminates assembly-induced stress offsets; achieves 600 µV max without laser trimming or extra pins. |
| Rail-to-rail input & output | Enables full dynamic range utilization with 3 V ADCs/DACs and zero-voltage-referenced sensors. |
| No phase reversal | Guarantees monotonic output during overdrive - essential for closed-loop motor control and safety-critical monitoring. |
| Low 1/f noise & 33 nV/√Hz broadband noise | Supports high-resolution DC-coupled measurements (e.g., thermopile, strain gauge) without added filtering. |
| Qualified for automotive applications | Meets AEC-Q100 Grade 1 requirements; validated for 125°C ambient operation in engine control modules. |
Applications
| Current Sensing | Audio Signal Buffering |
|---|---|
Use Scenario: High-side bidirectional current measurement in 12 V automotive ECUs using a 10 mΩ shunt resistor. IC Role / Device Role / Timing Role: Precision difference amplifier with rail-to-rail inputs accepting 0–12 V common-mode; outputs scaled voltage to MCU ADC. Use Value: 600 µV max offset ensures <±0.6% full-scale error at 10 A; no external level-shifting needed. |
Use Scenario: Line-level output driver for portable medical ultrasound transceivers requiring low THD+N. IC Role / Device Role / Timing Role: Unity-gain buffer isolating DAC output from capacitive cable loads while preserving 20 kHz bandwidth. Use Value: 33 nV/√Hz noise and 0.001% THD+N at 1 kHz enable >90 dB SNR in battery-powered diagnostics. |
| Multipole Active Filters | ASIC Interface Amplification |
Use Scenario: 4th-order low-pass filter for anti-aliasing before 1 MSPS SAR ADC in industrial data acquisition. IC Role / Device Role / Timing Role: Quad op-amp implementing two 2-pole Sallen-Key stages with matched GBW and phase margin. Use Value: 8.4 MHz GBP and 55° phase margin ensure stable 100 kHz cutoff with <0.1 dB passband ripple. |
Use Scenario: Input protection and level adaptation between 1.8 V FPGA I/O and 3.3 V analog front-end sensors. IC Role / Device Role / Timing Role: Rail-to-rail input amplifier translating 0–1.8 V logic-compatible signals to 0–3.3 V full-scale range. Use Value: 0.2 pA input bias prevents loading of high-impedance FPGA GPIO; 5 V/µs slew handles fast digital transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4188IDR | Lower offset (150 µV max), higher supply current (1 mA/amplifier), wider supply (4–36 V), SOIC-14 only. | Better DC accuracy but unsuitable for 2.7 V battery operation; preferred in industrial PLC analog I/O modules. | Select OPA4188IDR when ultra-low offset dominates over power and voltage range constraints. |
| ADA4077-4ARUZ | Higher precision (75 µV max), lower noise (8 nV/√Hz), slower GBW (3.2 MHz), TSSOP-14 compatible. | Superior for DC-coupled sensor front-ends (e.g., precision weigh scales); insufficient bandwidth for >300 kHz filtering. | Select ADA4077-4ARUZ when sub-100 µV offset and ultra-low noise outweigh speed requirements. |
Compared with AD8604WARZ, OPA4188IDR trades battery compatibility for lower offset, while ADA4077-4ARUZ sacrifices bandwidth for nanovolt-level DC stability - making AD8604WARZ the optimal balance of speed, precision, and single-supply efficiency in portable instrumentation.
Availability
AD8604WARZ is available at Aetrix Electronics and suitable for current sensing, audio buffering, multipole filters, and ASIC interface amplification requiring stable component supply across automotive, industrial, and portable medical device programs.
Supply support for AD8604WARZ 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 AD860x family was designed specifically for precision, low-power, single-supply signal conditioning in space-constrained applications - targeting battery-powered instrumentation, automotive sensors, and portable medical devices.
FAQ
What is the maximum operating temperature for AD8604WARZ?
The AD8604WARZ is fully specified from −40°C to +125°C ambient temperature and qualified for automotive Grade 1 applications. At +125°C, key parameters remain within datasheet limits: offset voltage ≤2400 µV (A grade), supply current ≤1500 µA per amplifier, and output swing maintains ≥4.6 V high and ≤250 mV low at 10 mA load under 5 V supply.
Does AD8604WARZ require external compensation for unity-gain stability?
No, AD8604WARZ is unity-gain stable per its datasheet specification. It features ≥50° phase margin and has been validated with capacitive loads up to 200 pF without oscillation. For optimal transient response, place a 0.1 µF ceramic decoupling capacitor between V+ and V− within 5 mm of the package.
Can AD8604WARZ drive a 600 Ω audio load directly?
Yes, AD8604WARZ can drive 600 Ω loads with <0.01% THD+N at 1 kHz when configured as a unity-gain buffer at 5 V supply. Output current capability is ±50 mA, and voltage swing remains ≥4.7 V at 10 mA sink/source - sufficient for line-level audio distribution without external buffers.
Is AD8604WARZ pin-compatible with other quad op-amps in TSSOP-14?
AD8604WARZ follows standard quad op-amp pinout (as defined in Figure 3 of Rev. I datasheet) and is pin-compatible with industry-standard TSSOP-14 quad amplifiers including OP482, MCP6004, and LM324 variants - provided supply voltage, bandwidth, and precision requirements align.
What is the input common-mode voltage range of AD8604WARZ?
The AD8604WARZ supports rail-to-rail input common-mode voltage: 0 V to VS across the full supply range (2.7 V to 5.5 V). This is achieved via parallel NMOS and PMOS input stages, with seamless transition between them - enabling direct interface with grounded sensors, battery monitors, and CMOS logic outputs.
AD8604WARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- DigiTrim®
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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:
- -
- Current - Supply:
- -
- 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-SOIC
AD8604WARZ FAQ
1.How can I place an order for AD8604WARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8604WARZ 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 AD8604WARZ reliable?
The price and inventory of AD8604WARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8604WARZ is usually 5 days.
3.What payment methods are accepted for AD8604WARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8604WARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8604WARZ?
AD8604WARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8604WARZ 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 AD8604WARZ?
For technical support, including AD8604WARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8604WARZ requirements.
6.How does Aetrix verify that AD8604WARZ is sourced from the original manufacturer or authorized distributors?
All AD8604WARZ 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 AD8604WARZ meets industry standards.
7.What is the process for return or replacement of AD8604WARZ?
All AD8604WARZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8604WARZ, 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 AD8604WARZ part is unused and in its original packaging.
Return procedure for AD8604WARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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