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Analog Devices Inc. OP727ARZ
- Part No.:
- OP727ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OP727ARZ.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:487
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Product details
Overview
OP727ARZ from Analog Devices is a precision dual rail-to-rail output operational amplifier optimized for micropower, single-supply operation (3.0 V to 30 V) and extended industrial temperature range (–40°C to +85°C). It delivers 100 µV max offset voltage, 10 nA max input bias current, 300 µA/amp supply current at 5 V, 0.2 V/µs slew rate, and rail-to-rail output swing - enabling high-accuracy signal conditioning in battery-powered instrumentation and remote sensor interfaces.
For engineers reviewing the OP727ARZ datasheet, OP727ARZ pinout, OP727ARZ application, or OP727ARZ equivalent, key selection criteria include its SOIC-8 package with nonstandard pin configuration, bipolar PNP input stage enabling true single-supply operation down to 3.0 V, no phase reversal behavior beyond common-mode range, and compatibility with capacitive loads >500 pF without instability.
Technical Context
The OP727ARZ employs a precision bipolar PNP input stage paired with a high-voltage CMOS output stage, enabling input voltage range extending to the negative rail (including ground) and within 1 V of the positive rail, plus rail-to-rail output swing to within 1 mV of both supply rails. Its architecture eliminates need for input clamp diodes, supporting precision rectifier and comparator applications.
It features built-in 500 Ω series input resistors for overvoltage protection, supports stable unity-gain operation, and maintains low noise (15 nV/√Hz at 1 kHz) and high PSRR (130 dB) - critical for low-drift, low-noise analog front-ends in portable and industrial systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0 V to 30 V single supply or ±1.5 V to ±15 V dual supply - enables direct interface with 3.3 V, 5 V, 12 V, and 24 V systems without level-shifting. |
| Input Offset Voltage (max) | 300 µV over –40°C to +85°C - ensures <0.03% gain error in 100× gain current-sense amplifiers using 0.1 Ω shunts. |
| Supply Current per Amplifier | 350 µA max at 5 V and full temperature range - supports multi-year battery life in remote sensor nodes with 10 µA sleep current budgets. |
| Input Bias Current (max) | 10 nA over –40°C to +85°C - allows use with MΩ-range feedback and sensor networks without significant DC error accumulation. |
| Output Swing | Rail-to-rail (within 1 mV of V+ and V−) - maximizes dynamic range in 3.3 V ADC interfaces and single-supply precision filters. |
| Gain Bandwidth Product | 0.7 MHz - sufficient for anti-aliasing filtering up to ~100 kHz and closed-loop gain ≥10 with phase margin >45°. |
| CMRR / PSRR | 110 dB CMRR and 130 dB PSRR - limits offset shift to <3 µV/V under supply ripple or common-mode transients. |
Pinout & Package
OP727ARZ is housed in an 8-lead narrow-body SOIC (R-8) package per JEDEC MS-012-AA, with 1.27 mm lead pitch and 5.00 mm × 3.99 mm body dimensions. Its pin configuration differs from standard op amp SOIC layouts and must be verified before PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | –IN B (Inverting Input, Channel B) | High-impedance PNP input node; protected by internal 500 Ω resistor; accepts signals down to V– and up to V+ −1 V. |
| 2 | +IN A (Noninverting Input, Channel A) | High-impedance PNP input node; same protection and voltage range as Pin 1; used for reference or sensor inputs. |
| 3 | V– (Negative Supply) | Ground reference in single-supply systems; supports true rail-to-rail input common-mode range from V– to V+ −1 V. |
| 4 | V+ (Positive Supply) | Accepts 3.0 V to 30 V; PSRR of 130 dB minimizes supply noise coupling into output. |
| 5 | OUT B (Output, Channel B) | CMOS output stage; drives ±10 mA; swings within 1 mV of V+ and V–; stable with >500 pF capacitive load. |
| 6 | –IN A (Inverting Input, Channel A) | Matches Pin 1 electrically; enables matched dual-channel configurations like instrumentation amps or differential receivers. |
| 7 | OUT A (Output, Channel A) | Identical performance to Pin 5; dual outputs allow independent signal paths or cascaded gain stages without external buffering. |
| 8 | +IN B (Noninverting Input, Channel B) | Completes second channel; enables simultaneous processing of two sensors or bridge arms in single-supply bridge circuits. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed operation without polarity inversion when inputs exceed common-mode range - prevents lockup in servo loops and protects downstream comparators. |
| Input overvoltage protection | Internal 500 Ω series resistors enable safe operation with input voltages up to ±5 V beyond supply rails - eliminates need for external clamping diodes. |
| Micropower + precision trade-off | 300 µA/amp supply current with 100 µV offset and 0.4 µV/°C drift - achieves 10× lower power than OP07 while matching dc accuracy. |
| Rail-to-rail output | Output swings to within 1 mV of both supply rails - preserves full 3.0 V input dynamic range for 12-bit+ ADCs without level-shifting circuitry. |
| Extended common-mode range | Inputs operate from V– to V+ −1 V - supports low-side current sensing, single-supply bridges, and ground-referenced sensor interfaces. |
Applications
| Low-Side Current Sensing | Single-Supply Bridge Amplification |
|---|---|
|
Use Scenario: Monitoring load current in 5 V battery-powered motor controllers using a 0.1 Ω shunt resistor on the ground return path. IC Role / Device Role / Timing Role: Dual op amp configured as precision difference amplifier (Channel A) and reference buffer (Channel B), rejecting common-mode noise from shared ground. Use Value: Enables accurate current measurement down to 10 mA with <1% error across –40°C to +85°C, leveraging matched input offset and drift between channels. |
Use Scenario: Linearizing Wheatstone bridge outputs from strain gauges in industrial pressure sensors powered from 12 V single supply. IC Role / Device Role / Timing Role: One channel amplifies bridge differential voltage; second channel buffers reference voltage for ratiometric ADC conversion. Use Value: Achieves >100 dB CMRR using internal matched amplifiers and external 0.1% resistor network - reduces bridge nonlinearity errors to <0.05% FS. |
| Remote Sensor Signal Conditioning | Precision Single-Supply Filter |
|
Use Scenario: Amplifying mV-level thermocouple or RTD signals in wireless sensor nodes with 3.3 V coin-cell supply and 10-year battery life target. IC Role / Device Role / Timing Role: Dual-channel configuration: first stage for cold-junction compensation and second for gain/offset adjustment prior to ADC. Use Value: 10 nA input bias current avoids loading high-impedance thermocouple sources; 350 µA total supply current extends battery life beyond 8 years at 1 sample/sec. |
Use Scenario: Implementing 2nd-order Sallen-Key low-pass filter in portable medical ECG front-end operating from 3.0 V supply. IC Role / Device Role / Timing Role: One amplifier as unity-gain buffer driving RC network; second as active integrator providing precise cutoff at 150 Hz. Use Value: Rail-to-rail output swing preserves full 3.0 Vpp signal headroom; 0.2 V/µs slew rate supports clean step response without overshoot at 150 Hz corner. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision dual op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8607ARMZ | FET-input (pA bias), 50 µV offset, 1.5 MHz GBW, 120 µA/amp - lower noise but higher supply current than OP727ARZ. | Better for high-impedance pH or photodiode sensors; less suitable for low-voltage (<3.3 V) rail-to-rail output requirements. | Select AD8607ARMZ when input bias <1 pA is mandatory and supply voltage ≥2.7 V permits higher quiescent current. |
| LT1013DN8#PBF | Bipolar input, 150 µV offset, 800 kHz GBW, 350 µA/amp - pin-compatible SOIC-8 but lacks rail-to-rail output and no-phase-reversal guarantee. | Compatible with legacy OP727 footprints but requires external level-shifting for 3.3 V ADC interfacing and risks phase reversal in overdriven conditions. | Choose LT1013DN8#PBF only for drop-in replacement in existing designs where rail-to-rail output is not required and input overdrive is strictly controlled. |
Compared with AD8607ARMZ and LT1013DN8#PBF, OP727ARZ uniquely combines bipolar PNP input accuracy (low offset, low drift) with rail-to-rail output, no-phase-reversal behavior, and 3.0 V minimum supply - making it optimal for new designs requiring robust single-supply precision at ultra-low power.
Availability
OP727ARZ is available at Aetrix Electronics and suitable for low-power instrumentation, remote sensor nodes, and single-supply industrial control systems requiring stable component supply across long production lifecycles.
Supply support for OP727ARZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The OP727ARZ belongs to the OP7xx precision micropower op amp family, designed specifically for battery-powered and energy-constrained applications demanding rail-to-rail operation, low drift, and robust input protection without sacrificing dc accuracy.
FAQ
What is the minimum supply voltage for reliable operation of the OP727ARZ?
The OP727ARZ operates reliably from a minimum single supply of 3.0 V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. At 3.0 V, it maintains rail-to-rail output swing, 100 µV max offset, and 350 µA/amp supply current across –40°C to +85°C - making it suitable for coin-cell and Li-ion battery systems where voltage drops below 3.3 V during discharge.
Does the OP727ARZ support rail-to-rail input common-mode voltage range?
The OP727ARZ supports input common-mode voltage from V– (e.g., ground) to V+ −1 V - not full rail-to-rail input. However, it can tolerate inputs slightly below V– due to its PNP input stage and internal 500 Ω protection resistors. This enables true low-side current sensing and single-supply bridge operation where one input is grounded, but does not accept signals equal to V+.
Is the OP727ARZ pin-compatible with standard SOIC-8 operational amplifiers?
No - the OP727ARZ uses a nonstandard SOIC-8 pinout explicitly noted in the datasheet: Pin 1 is –IN B, Pin 2 is +IN A, Pin 3 is V–, Pin 4 is V+, Pin 5 is OUT B, Pin 6 is –IN A, Pin 7 is OUT A, and Pin 8 is +IN B. This differs from industry-standard SOIC-8 op amps (e.g., LM358, TL072), requiring dedicated footprint validation before PCB layout.
Can the OP727ARZ drive capacitive loads without oscillation?
Yes - the OP727ARZ is specified to remain stable with capacitive loads exceeding 500 pF in unity-gain configuration, as stated in the General Description and verified in TPC 19–20 (output impedance vs. frequency). This eliminates need for isolation resistors in driving ADC input capacitors or long cables, simplifying filter design in precision data acquisition systems.
What is the maximum output current capability of the OP727ARZ?
The OP727ARZ delivers ±10 mA output current under normal operating conditions (VDROPOUT < 1 V), and is short-circuit protected up to ±30 mA without damage - provided die temperature remains within absolute maximum limits. This supports direct driving of LED indicators, small relays, or 10 kΩ load resistors at full rail-to-rail swing without external buffers.
OP727ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.2V/µs
- Gain Bandwidth Product:
- 700 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 nA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 235µA (x2 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OP727ARZ FAQ
1.How can I place an order for OP727ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for OP727ARZ 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 OP727ARZ reliable?
The price and inventory of OP727ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP727ARZ is usually 5 days.
3.What payment methods are accepted for OP727ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP727ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP727ARZ?
OP727ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP727ARZ 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 OP727ARZ?
For technical support, including OP727ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP727ARZ requirements.
6.How does Aetrix verify that OP727ARZ is sourced from the original manufacturer or authorized distributors?
All OP727ARZ 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 OP727ARZ meets industry standards.
7.What is the process for return or replacement of OP727ARZ?
All OP727ARZ units undergo pre-shipment inspection (PSI). If there is an issue with OP727ARZ, 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 OP727ARZ part is unused and in its original packaging.
Return procedure for OP727ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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