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Analog Devices Inc. AD8574ARUZ-REEL
- Part No.:
- AD8574ARUZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD8574ARUZ-REEL.pdf
- Description:
- IC OPAMP ZER-DRIFT 4CIRC 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,775
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Product details
Overview
AD8574ARUZ-REEL from Analog Devices is a quad zero-drift, rail-to-rail input/output operational amplifier optimized for precision dc-coupled sensing and instrumentation. It delivers 1 µV typical offset voltage, 0.005 µV/°C drift, 145 dB open-loop gain, and operates from 2.7 V to 5 V single supply - enabling high-accuracy signal conditioning in temperature sensors and strain gage amplifiers.
For engineers reviewing the AD8574ARUZ-REEL datasheet, AD8574ARUZ-REEL pinout, AD8574ARUZ-REEL application, or AD8574ARUZ-REEL equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, and confirmed alternative options for low-drift op amp selection in automotive and industrial measurement systems.
Technical Context
The AD8574ARUZ-REEL employs a spread-spectrum auto-zero architecture with randomized correction clocking to eliminate intermodulation distortion while maintaining ultralow dc error. Its dual-amplifier topology uses a main amplifier and a nulling amplifier sharing rail-to-rail CMOS input stages (NMOS + PMOS parallel pairs) and a common-source output stage.
It achieves rail-to-rail swing via complementary output transistors whose on-resistance limits voltage headroom under load - e.g., 15 mV max VOL at 10 kΩ load (5 V supply). Output short-circuit protection is rated ±50 mA, and overload recovery time is specified at 50 µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 1 µV typical - enables ≤10 µV total system offset in 4-op-amp instrumentation paths without trimming. |
| Offset Drift | 0.005 µV/°C - contributes <0.6 µV error over −40°C to +125°C, critical for uncalibrated automotive sensor modules. |
| Supply Range | 2.7 V to 5 V single supply - supports direct interface with 3.3 V microcontrollers and legacy 5 V data acquisition systems. |
| Open-Loop Gain | 145 dB typical - ensures <0.001% gain error at 100× closed-loop gain with 10 kΩ load. |
| CMRR / PSRR | 140 dB / 130 dB typical - rejects >100 dB of common-mode noise and supply ripple, essential for millivolt-level thermocouple signals. |
| Supply Current | 750 µA per amplifier - allows four-channel precision amplification within 3 mA total budget for battery-powered handheld meters. |
| Output Swing | Rail-to-rail: VOL ≤ 15 mV, VOH ≥ 4.98 V (5 V, 10 kΩ) - preserves full dynamic range when driving SAR ADCs with 0–5 V input ranges. |
Pinout & Package
AD8574ARUZ-REEL is packaged in a 14-lead TSSOP (RU suffix), 5.0 mm × 4.4 mm body, 0.65 mm pitch, exposed pad not electrically connected. Thermal resistance θJA = 180°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load or feedback network; rail-to-rail capable up to ±30 mA. |
| 2 | −IN A | Inverting input of Amp A - high-impedance node (10 pA bias current); requires matched trace impedance for noise rejection. |
| 3 | +IN A | Noninverting input of Amp A - same bias current as −IN A; used for reference or sensor excitation return in differential configurations. |
| 4 | V+ | Positive supply rail - must be bypassed with ≥0.1 µF ceramic capacitor close to pin; supports 2.7–5 V operation. |
| 5 | +IN B | Noninverting input of Amp B - independent of Amp A; enables dual-channel sensor front-end with shared V+ and V−. |
| 6 | −IN B | Inverting input of Amp B - electrically isolated from Amp A inputs; allows separate gain-setting resistors per channel. |
| 7 | OUT B | Amplifier B output - identical performance to OUT A; no internal crosstalk specified between channels. |
| 8 | V− | Negative supply rail - tied to GND in single-supply mode; serves as reference for rail-to-rail input common-mode range (0–V+). |
| 9 | OUT C | Amplifier C output - fully independent channel; supports 3-channel simultaneous sampling or multi-stage filtering. |
| 10 | −IN C | Inverting input of Amp C - matches bias current and noise specs of other inputs; suitable for current-sense shunt monitoring. |
| 11 | +IN C | Noninverting input of Amp C - used for reference buffering or active filter zero placement in 3rd-order anti-aliasing networks. |
| 12 | +IN D | Noninverting input of Amp D - enables fourth analog channel without external multiplexing, reducing latency in closed-loop control. |
| 13 | −IN D | Inverting input of Amp D - supports differential output driver configuration when paired with OUT D and external resistors. |
| 14 | OUT D | Amplifier D output - completes quad functionality; all four outputs can drive 10 kΩ loads simultaneously within thermal limits. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitors required | Internal auto-zero capacitor eliminates need for external timing or storage caps - reduces BOM count and PCB area in space-constrained modules. |
| Ultralow input bias current (10 pA) | Enables use with high-impedance sources (e.g., pH electrodes, piezoresistive sensors) without significant voltage drop or drift-induced error. |
| Rail-to-rail input and output | Supports full-scale signal capture from 0 V to V+ without level-shifting circuitry - simplifies design of 3.3 V/5 V mixed-signal systems. |
| Randomized auto-zero clock | Prevents aliasing and intermodulation distortion in ac-coupled applications (e.g., audio-grade sensor interfaces) by spreading correction energy across spectrum. |
| −40°C to +125°C operation | Qualified for under-hood automotive and industrial motor control environments where ambient temperature extremes degrade conventional op amps. |
Applications
| Temperature Sensors | Strain Gage Amplifiers |
|---|---|
|
Use Scenario: Amplifying low-level output (10–100 µV/°C) from platinum RTD or thermistor bridges in HVAC controllers. IC Role / Device Role / Timing Role: Primary instrumentation amplifier stage with fixed-gain configuration (G = 100–1000) and dc-coupled output. Use Value: 1 µV offset and 0.005 µV/°C drift limit temperature measurement error to <0.02°C over full industrial range without calibration. |
Use Scenario: Conditioning mV-level Wheatstone bridge outputs from metal foil or semiconductor strain gages in load cells. IC Role / Device Role / Timing Role: First-stage differential amplifier with matched resistor network for common-mode rejection and gain stability. Use Value: 140 dB CMRR and rail-to-rail swing preserve signal fidelity across 0–5 V ADC input range, even with 10 mV full-scale bridge output. |
| Medical Instrumentation | Precision Current Sensing |
|
Use Scenario: Biopotential signal acquisition (ECG, EMG) requiring high input impedance and sub-µV noise floor. IC Role / Device Role / Timing Role: Front-end buffer and gain stage before programmable gain amplifier (PGA) and ADC. Use Value: 10 pA input bias current prevents electrode polarization errors; 51 nV/√Hz noise density maintains SNR > 80 dB at 1 kHz. |
Use Scenario: Shunt-based current monitoring in 12 V/48 V battery management systems with ±100 A range. IC Role / Device Role / Timing Role: High-side or low-side current sense amplifier with Kelvin-connected shunt and precision gain resistors. Use Value: 1 µV offset translates to <10 µA error at 10 mΩ shunt - meets IEC 62368-1 accuracy requirements for Class II power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189IDR | 2 µV offset, 0.005 µV/°C drift, 5.5 V max supply, 1.3 MHz GBW - higher bandwidth but 2× supply current (1.3 mA/op). | Better for wideband sensor interfaces (e.g., ultrasonic flow meters); less optimal for ultra-low-power portable devices. | Select OPA2189IDR when bandwidth >1 MHz is required and supply current budget allows ≥1.3 mA/op. |
| LTC2057HMS8#PBF | 3 µV offset, 0.02 µV/°C drift, 6 V max supply, 2 MHz GBW - wider supply range but higher drift degrades long-term stability. | Suitable for high-voltage industrial PLC analog inputs; less ideal for automotive under-hood where drift dominates error budget. | Select LTC2057HMS8#PBF when operating above 5 V or requiring >2 MHz bandwidth, accepting higher drift-induced error. |
Compared with OPA2189IDR and LTC2057HMS8#PBF, AD8574ARUZ-REEL offers the lowest drift (0.005 µV/°C) and lowest quiescent current (750 µA/op) within its 2.7–5 V supply window - making it optimal for battery-powered, high-stability, quad-channel measurement systems where thermal drift and power are primary constraints.
Availability
AD8574ARUZ-REEL is available at Aetrix Electronics and suitable for temperature sensors, strain gage amplifiers, and precision current sensing requiring stable component supply across automotive, industrial, and medical production programs.
Supply support for AD8574ARUZ-REEL 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 AD857x family was designed specifically for precision dc signal conditioning in harsh environments - targeting applications where traditional chopper or auto-zero amplifiers were cost-prohibitive, including automotive cabin sensors and industrial process control.
FAQ
What is the maximum operating temperature range for the AD8574ARUZ-REEL?
The AD8574ARUZ-REEL is specified for continuous operation from −40°C to +125°C, meeting extended industrial and automotive under-hood requirements. This rating is validated across all electrical parameters in the datasheet's "5 V Electrical Characteristics" and "2.7 V Electrical Characteristics" tables, including offset voltage, CMRR, and supply current.
Does the AD8574ARUZ-REEL require external capacitors for auto-zero operation?
No, the AD8574ARUZ-REEL integrates all necessary auto-zero timing and storage capacitance internally. The datasheet explicitly states "No external capacitors required" in the FEATURES section, and Figure 50/51 functional diagrams confirm internal capacitor CM1 is monolithically fabricated - eliminating layout sensitivity and BOM overhead.
Can the AD8574ARUZ-REEL drive a 10 kΩ load rail-to-rail at 5 V supply?
Yes. At 5 V supply and 25°C, the AD8574ARUZ-REEL guarantees VOH ≥ 4.95 V and VOL ≤ 30 mV into 10 kΩ (Table 1, Output Voltage High/Low rows). Over temperature (−40°C to +125°C), VOH remains ≥ 4.95 V and VOL ≤ 30 mV - confirming true rail-to-rail capability for standard 10 kΩ ADC input loads.
What is the input common-mode voltage range of the AD8574ARUZ-REEL?
The AD8574ARUZ-REEL supports rail-to-rail input common-mode range: 0 V to V+ across its full 2.7 V to 5 V supply range. For example, at 3.3 V supply, inputs operate from 0 V to 3.3 V; at 5 V, from 0 V to 5 V - verified in Table 1 (Input Voltage Range = 0 to 5 V) and Table 2 (0 to 2.7 V).
Is the AD8574ARUZ-REEL pin-compatible with other AD857x variants?
No. The AD8574ARUZ-REEL (14-lead TSSOP) has a unique pinout versus AD8571 (8-lead) and AD8572 (8-lead). Even among quad versions, the AD8574ARUZ-REEL differs from AD8574ARZ (14-lead SOIC) only in package - same pin numbering and function per Figure 5 and Figure 6, but not mechanically interchangeable due to footprint differences.
AD8574ARUZ-REEL 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:
- Zero-Drift
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.4V/µs
- Gain Bandwidth Product:
- 1.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 nA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 850µA (x4 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
AD8574ARUZ-REEL FAQ
1.How can I place an order for AD8574ARUZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8574ARUZ-REEL 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 AD8574ARUZ-REEL reliable?
The price and inventory of AD8574ARUZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8574ARUZ-REEL is usually 5 days.
3.What payment methods are accepted for AD8574ARUZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8574ARUZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8574ARUZ-REEL?
AD8574ARUZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8574ARUZ-REEL 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 AD8574ARUZ-REEL?
For technical support, including AD8574ARUZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8574ARUZ-REEL requirements.
6.How does Aetrix verify that AD8574ARUZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD8574ARUZ-REEL 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 AD8574ARUZ-REEL meets industry standards.
7.What is the process for return or replacement of AD8574ARUZ-REEL?
All AD8574ARUZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8574ARUZ-REEL, 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 AD8574ARUZ-REEL part is unused and in its original packaging.
Return procedure for AD8574ARUZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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