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Analog Devices Inc. AD8574ARZ-REEL7
- Part No.:
- AD8574ARZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8574ARZ-REEL7.pdf
- Description:
- IC OPAMP ZERO-DRIFT 4CIRC 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,251
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Product details
Overview
AD8574ARZ-REEL7 from Analog Devices is a quad zero-drift, rail-to-rail input/output operational amplifier optimized for precision dc-coupled sensing and signal conditioning. 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 amplification in temperature-sensitive medical instrumentation and strain gage interfaces.
For engineers reviewing the AD8574ARZ-REEL7 datasheet, AD8574ARZ-REEL7 pinout, AD8574ARZ-REEL7 application, or AD8574ARZ-REEL7 equivalent, key selection criteria include ultralow drift over −40°C to +125°C, rail-to-rail swing at low supply, absence of external capacitors, and guaranteed quad-channel matching in a 14-lead SOIC package.
Technical Context
The AD8574ARZ-REEL7 employs a spread-spectrum auto-zero architecture with randomized correction clocking to eliminate intermodulation distortion while maintaining sub-µV offset stability. Its dual-amplifier topology - main amplifier plus nulling amplifier - continuously corrects input offset without requiring external components.
This architecture enables simultaneous achievement of 140 dB CMRR, 130 dB PSRR, and 50 µs overload recovery time across the full industrial/automotive temperature range. The rail-to-rail input stage uses parallel NMOS/PMOS differential pairs, and the output stage uses common-source transistors with short-circuit protection up to ±50 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 1 µV typical - enables ≤10 µV total system offset error in precision current sensing with 100× gain. |
| Offset Drift | 0.005 µV/°C - contributes <0.6 µV error over −40°C to +125°C span, critical for uncalibrated sensor front-ends. |
| Supply Range | 2.7 V to 5 V single supply - supports direct interface with 3.3 V and 5 V microcontrollers and ADCs without level-shifting. |
| Open-Loop Gain | 145 dB typical - ensures <0.0003% gain error at 100× closed-loop gain, essential for thermocouple amplifiers. |
| CMRR / PSRR | 140 dB / 130 dB typical - rejects >100 dB of common-mode noise and supply ripple, preserving signal integrity in noisy environments. |
| Output Swing | Rail-to-rail - delivers full 0 V to 5 V (or 0 V to 2.7 V) output range into 10 kΩ load, maximizing dynamic range for 12-bit+ ADCs. |
| Supply Current | 750 µA per amplifier - allows four independent precision channels within 3 mA total, suitable for battery-powered portable instruments. |
Pinout & Package
AD8574ARZ-REEL7 is housed in a 14-lead narrow SOIC (R suffix) package with standard pin spacing and RoHS-compliant lead finish. Thermal resistance θJA is 120°C/W, supporting operation up to +125°C ambient with moderate PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load or feedback network; rail-to-rail capable. |
| 2 | −IN A | Inverting input of Amplifier A - accepts differential or single-ended signals with full 0 V to VS common-mode range. |
| 3 | +IN A | Noninverting input of Amplifier A - high-impedance (10 pA bias), matched to −IN A for optimal CMRR. |
| 4 | V+ | Positive supply rail - connects to 2.7 V–5 V source; decoupling capacitor recommended near pin. |
| 5 | +IN B | Noninverting input of Amplifier B - electrically isolated from other channels; supports independent sensor inputs. |
| 6 | −IN B | Inverting input of Amplifier B - matched pair with +IN B; maintains channel-to-channel offset matching <5 µV. |
| 7 | OUT B | Amplifier B output - identical performance to OUT A; no crosstalk between channels in normal operation. |
| 8 | V− | Negative supply rail (GND) - reference for all inputs/outputs; low-impedance ground plane required. |
| 9 | OUT C | Amplifier C output - fully independent channel; supports multi-sensor systems without shared gain stages. |
| 10 | −IN C | Inverting input of Amplifier C - same input structure as A/B; enables three-wire bridge configurations. |
| 11 | +IN C | Noninverting input of Amplifier C - matched to −IN C; supports ratiometric sensor excitation referencing V+. |
| 12 | +IN D | Noninverting input of Amplifier D - allows fourth independent signal path; useful for reference buffering or diagnostics. |
| 13 | −IN D | Inverting input of Amplifier D - completes quad-channel set; all inputs specified for 0 V to VS common-mode range. |
| 14 | OUT D | Amplifier D output - identical electrical specs to other outputs; enables full 4-channel analog front-end integration. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Eliminates thermal drift-induced errors in long-duration measurements without calibration cycles. |
| No external capacitors required | Reduces BOM count and board space; eliminates capacitor aging, tolerance, and temperature drift effects. |
| Rail-to-rail I/O at 2.7 V | Preserves full signal swing in low-voltage battery-powered systems, avoiding clipping below 3 V supply. |
| Spread-spectrum auto-zero | Prevents intermodulation distortion in ac-coupled applications by randomizing correction frequency. |
| −40°C to +125°C operation | Guaranteed performance across automotive under-hood and industrial control environments. |
| Quad-channel matching | Ensures consistent gain, offset, and drift across all four amplifiers - simplifies multi-channel calibration. |
Applications
| Temperature Sensors | Pressure Sensors |
|---|---|
Use Scenario: Amplifying low-level thermistor or RTD voltage changes in HVAC controllers and environmental monitors. IC Role / Device Role / Timing Role: Precision dc-coupled instrumentation amplifier front-end with ratiometric reference support. Use Value: 0.005 µV/°C drift ensures <0.1°C measurement error over full temperature range without software compensation. |
Use Scenario: Conditioning millivolt-level outputs from piezoresistive pressure transducers in medical infusion pumps. IC Role / Device Role / Timing Role: Low-noise, high-CMRR bridge amplifier with rail-to-rail output driving 16-bit SAR ADCs. Use Value: 1 µV offset enables resolution of sub-0.01% FS pressure changes, meeting ISO 80601 clinical accuracy requirements. |
| Precision Current Sensing | Strain Gage Amplifiers |
Use Scenario: Measuring bidirectional motor phase currents in BLDC inverters using shunt resistors. IC Role / Device Role / Timing Role: High-gain, low-drift difference amplifier with fast overload recovery for fault detection. Use Value: 50 µs recovery time prevents false overcurrent trips during PWM switching transients. |
Use Scenario: Amplifying Wheatstone bridge outputs from load cells in industrial weighing scales. IC Role / Device Role / Timing Role: Quad-channel signal conditioner with matched channels for excitation, sensing, and reference buffering. Use Value: Channel-to-channel offset matching <5 µV reduces calibration burden and improves repeatability to ±0.005% FS. |
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, but dual-channel only; higher 1.3 MHz GBP vs. 1.5 MHz for AD8574ARZ-REEL7. | Requires two devices for quad functionality; better for bandwidth-critical designs with lower channel count. | Select when needing higher slew rate (0.7 V/µs) and integrated EMI filtering, but accept dual-channel limitation. |
| LTC2057HMS8#PBF | 0.5 µV offset, 0.01 µV/°C drift, 1.2 MHz GBP; single-channel, 8-lead MSOP package. | Not pin-compatible; requires redesign for quad implementation; superior offset but higher cost per channel. | Choose for ultra-low-offset single-channel nodes where ultimate dc accuracy outweighs channel density and cost. |
Compared with OPA2189IDR and LTC2057HMS8#PBF, AD8574ARZ-REEL7 uniquely delivers quad-channel zero-drift performance in a single 14-lead SOIC, minimizing board area and inter-channel mismatch - making it optimal for compact, multi-sensor industrial modules where layout space and calibration efficiency are critical.
Availability
AD8574ARZ-REEL7 is available at Aetrix Electronics and suitable for precision current sensing, strain gage amplification, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8574ARZ-REEL7 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 high-accuracy, low-drift signal conditioning in demanding industrial, automotive, and medical applications - prioritizing dc precision, temperature stability, and ease of use over raw speed.
FAQ
What is the operating temperature range for AD8574ARZ-REEL7?
The AD8574ARZ-REEL7 is specified for operation from −40°C to +125°C, fully qualified for extended industrial and automotive under-hood applications. All key parameters - including offset voltage, drift, CMRR, and PSRR - are guaranteed across this range per the Rev. F datasheet, making AD8574ARZ-REEL7 suitable for harsh-environment deployments without derating.
Does AD8574ARZ-REEL7 require external capacitors for auto-zero stabilization?
No, AD8574ARZ-REEL7 does not require external capacitors for auto-zero operation. Its internal spread-spectrum auto-zero architecture integrates all necessary correction circuitry on-die. This eliminates capacitor-related drift, aging, and board space requirements - a key design advantage confirmed in the General Description and Features sections of the AD8574 datasheet.
What package type is used for AD8574ARZ-REEL7?
AD8574ARZ-REEL7 is supplied in a 14-lead narrow SOIC package (R suffix), with θJA = 120°C/W and RoHS-compliant lead finish. This package is distinct from the TSSOP variant (RU suffix) and matches the pinout shown in Figure 6 of the AD8574 Rev. F datasheet - verified via Analog Devices' official ordering guide.
How does AD8574ARZ-REEL7 achieve rail-to-rail input capability?
AD8574ARZ-REEL7 achieves rail-to-rail input through a parallel NMOS/PMOS differential input stage that collectively covers the full 0 V to VS common-mode range. This architecture - detailed in the Amplifier Architecture section - ensures linear operation even when input signals approach either supply rail, unlike conventional op amps with limited input voltage range.
Can AD8574ARZ-REEL7 drive capacitive loads without instability?
AD8574ARZ-REEL7 can drive up to 300 pF capacitive loads with minimal overshoot (<5%) when configured with AV = 1 and RL = 2 kΩ, as demonstrated in Figures 23–24 and 27–28 of the datasheet. For heavier loads, external isolation resistors (e.g., 10–50 Ω in series with output) are recommended to maintain phase margin and prevent oscillation.
AD8574ARZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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-SOIC
AD8574ARZ-REEL7 FAQ
1.How can I place an order for AD8574ARZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8574ARZ-REEL7 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 AD8574ARZ-REEL7 reliable?
The price and inventory of AD8574ARZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8574ARZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8574ARZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8574ARZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8574ARZ-REEL7?
AD8574ARZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8574ARZ-REEL7 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 AD8574ARZ-REEL7?
For technical support, including AD8574ARZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8574ARZ-REEL7 requirements.
6.How does Aetrix verify that AD8574ARZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8574ARZ-REEL7 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 AD8574ARZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8574ARZ-REEL7?
All AD8574ARZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8574ARZ-REEL7, 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 AD8574ARZ-REEL7 part is unused and in its original packaging.
Return procedure for AD8574ARZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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