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Analog Devices Inc. OP284ESZ
- Part No.:
- OP284ESZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OP284ESZ.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,980
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Product details
Overview
OP284ESZ from Analog Devices is a dual-channel, precision rail-to-rail input and output operational amplifier optimized for single-supply operation across 3 V to 36 V (±1.5 V to ±18 V). It delivers 4 MHz gain bandwidth, 3.9 nV/√Hz voltage noise density, and 65 μV typical input offset voltage (E-grade), enabling high-fidelity signal conditioning in battery-powered instrumentation and DAC output buffering.
For engineers reviewing the OP284ESZ datasheet, OP284ESZ pinout, OP284ESZ application, or OP284ESZ equivalent, this device is selected where simultaneous precision DC accuracy, wide dynamic range, low-noise AC performance, and rail-to-rail swing in compact dual SOIC-8 packaging are required - especially in space-constrained, low-voltage industrial sensing and power management systems.
Technical Context
The OP284ESZ employs a composite input stage with concurrent NPN and PNP differential pairs to achieve true rail-to-rail input common-mode range (0 V to VS) while maintaining low input bias current drift (150 pA/°C) and balanced source impedance sensitivity. Its second-stage compound folded cascade architecture combines differential outputs into a single-ended signal before driving a unique inverting-output stage.
Rail-to-rail output is realized via complementary sourcing/sinking transistors that saturate within 125 mV of V– and 200 mV of V+ under 1 mA load, enabling multistage filter designs in single-supply topologies without false-ground circuitry. The device is fully specified over −40°C to +125°C and exhibits 45° phase margin at unity gain with 2 kΩ load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 36 V (or ±1.5 V to ±18 V): supports direct integration into 3.3 V, 5 V, 12 V, and 24 V industrial and portable systems without level-shifting. |
| Gain Bandwidth Product | 4.25 MHz (typ. at ±15 V): enables stable closed-loop operation up to ~400 kHz at gain = 10, suitable for anti-aliasing and reconstruction filters. |
| Input Offset Voltage (E-grade) | 65 μV (typ. at 25°C, 5 V supply): ensures ≤0.13% error in 50 mV full-scale sensor interfaces without trimming. |
| Voltage Noise Density | 3.9 nV/√Hz at 1 kHz: maintains SNR > 90 dB for 20 kHz audio-band signals with 10 kΩ source impedance. |
| Slew Rate | 4.0 V/μs (typ. at ±15 V): supports 10 VPP output at 600 kHz without slewing distortion in fast-settling control loops. |
| Output Swing (RL = 2 kΩ) | Within 125 mV of V– and 200 mV of V+: preserves >95% of full-scale dynamic range in 3.3 V ADC driver applications. |
| Common-Mode Rejection Ratio | 86 dB (min. over −40°C to +125°C, VCM = 1–4 V): rejects >99.9% of 50/60 Hz interference in single-supply transducer front-ends. |
Pinout & Package
OP284ESZ is housed in an 8-lead SOIC (S-suffix) surface-mount package with standard JEDEC MS-012AC footprint (5.3 mm × 6.2 mm, 1.27 mm pitch). Thermal resistance θJA = 158°C/W (JEDEC Std, 2s2p layout).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output node; capable of sourcing/sinking ±6.5 mA while maintaining rail-to-rail swing. |
| 2 | −IN A | Inverting input of Amplifier A; part of dual NPN/PNP input pair enabling 0 V to VS common-mode range. |
| 3 | +IN A | Non-inverting input of Amplifier A; matched to Pin 2 for optimal CMRR and bias current cancellation. |
| 4 | V− | Negative supply terminal; connects to GND in single-supply mode or negative rail in split-supply mode. |
| 5 | +IN B | Non-inverting input of Amplifier B; electrically isolated but thermally coupled to Amplifier A for matched drift. |
| 6 | −IN B | Inverting input of Amplifier B; shares same input stage topology and protection as Pin 2. |
| 7 | OUT B | Amplifier B output node; identical AC/DC specs to Pin 1; supports independent channel operation. |
| 8 | V+ | Positive supply terminal; accepts up to +36 V or −18 V; PSRR = 76 dB (min.) over full temperature range. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 3 V–36 V supply rails in single-supply configurations, eliminating need for virtual ground or level-shifting networks. |
| Low 3.9 nV/√Hz voltage noise | Preserves signal integrity in low-amplitude sensor interfaces (e.g., piezoelectric, Hall effect) without requiring external noise filtering. |
| 65 μV max input offset (E-grade) | Reduces calibration burden in precision 12–16-bit data acquisition systems; offset drift ≤2.0 μV/°C ensures stability over industrial temperature range. |
| Unity-gain stable | Permits direct use in voltage follower, active filter, and buffer configurations without external compensation components. |
| Specified from −40°C to +125°C | Validates performance in automotive engine control units, industrial motor drives, and outdoor telecom equipment without derating. |
Applications
| Battery-Powered Instrumentation | DAC Output Amplification |
|---|---|
|
Use Scenario: Portable pH meter with microcontroller-based ADC sampling analog output of ion-selective electrode. IC Role / Device Role / Timing Role: Precision DC-coupled buffer amplifying mV-level electrode signal while rejecting common-mode noise from shared battery supply. Use Value: Rail-to-rail input accepts 0–3.3 V electrode output directly; 65 μV offset contributes <0.02% error at 300 mV full scale. |
Use Scenario: 12-bit DAC in programmable power supply generating 0–5 V reference for voltage-controlled current source. IC Role / Device Role / Timing Role: Low-noise, unity-gain output amplifier driving capacitive load of feedback network with minimal settling time. Use Value: 4.0 V/μs slew rate achieves 0.01% settling in <2.5 μs for 1 V step; rail-to-rail output ensures full 0–5 V compliance. |
| Power Supply Control & Protection | ADC Input Buffering |
|
Use Scenario: Overvoltage/overcurrent monitor in 24 V industrial PSU using op-amp comparators and shunt-based current sensing. IC Role / Device Role / Timing Role: High-CMRR differential amplifier measuring voltage drop across sense resistor while rejecting switching noise. Use Value: 86 dB CMRR minimizes error from 24 V rail ripple; 4 MHz bandwidth captures transient fault events within microseconds. |
Use Scenario: Front-end signal conditioning for 16-bit SAR ADC sampling thermocouple output via cold-junction compensation. IC Role / Device Role / Timing Role: Low-drift, low-noise non-inverting amplifier with gain = 100, driving ADC input with minimal added noise. Use Value: 3.9 nV/√Hz noise adds <0.5 LSB RMS noise at 100 kHz bandwidth; 1.45 mA supply current extends battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8672ARZ | Lower offset (12 μV typ.), higher GBP (10 MHz), but only 10 V max supply and no rail-to-rail input. | Better for high-precision, low-voltage (<12 V) lab equipment; unsuitable for 24 V industrial sensors or battery-powered 3.3 V systems. | Select AD8672ARZ when ultra-low offset dominates requirements and supply is ≤12 V; avoid when rail-to-rail input or >12 V operation is needed. |
| OPA2333AIDR | Zero-drift architecture (0.02 μV/°C drift), lower quiescent current (17 μA), but narrower GBW (350 kHz) and lower output drive (±25 mA). | Ideal for ultra-stable, ultra-low-power IoT sensor nodes; insufficient for high-speed DAC buffering or active filtering above 100 kHz. | Choose OPA2333AIDR for nanovolt-level DC stability in energy-harvesting devices; reject for bandwidth-critical or high-output-current roles. |
Compared with AD8672ARZ and OPA2333AIDR, OP284ESZ uniquely balances 4 MHz bandwidth, rail-to-rail I/O, 36 V operation, and 65 μV offset - making it the only option among the three viable for 24 V industrial DAC buffers requiring both speed and full-supply-range linearity.
Availability
OP284ESZ is available at Aetrix Electronics and suitable for battery-powered instrumentation, power supply control and protection, and telecommunications infrastructure requiring stable component supply across extended temperature and voltage ranges.
Supply support for OP284ESZ 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 OP284ESZ belongs to the OPx84 family of precision rail-to-rail op-amps designed specifically for portable instrumentation and single-supply industrial signal chains demanding simultaneous AC fidelity and DC accuracy.
FAQ
What is the maximum supply voltage rating for OP284ESZ?
The OP284ESZ has an absolute maximum supply voltage rating of ±18 V, meaning the total differential voltage between V+ and V− must not exceed 36 V. Operation is guaranteed from 3 V to 36 V (single-supply) or ±1.5 V to ±18 V (split-supply). Exceeding ±18 V risks permanent damage per Table 5 in the Rev. J datasheet.
Does OP284ESZ support true rail-to-rail input with 0 V common-mode voltage?
Yes. The OP284ESZ input stage uses parallel NPN and PNP differential pairs, enabling a guaranteed common-mode input range of 0 V to VS across all supply voltages and temperatures. At 5 V supply, inputs function correctly from 0 V to 5 V - critical for interfacing with unipolar sensors and DACs without level-shifting.
What is the typical output voltage swing for OP284ESZ under 2 kΩ load?
At 5 V supply and 1 mA load, OP284ESZ delivers a minimum output swing of 0.125 V above V− and 4.80 V below V+, i.e., 0.125 V to 4.80 V. This 4.675 V peak-to-peak swing represents >93% of the full 5 V rail, preserving dynamic range in 12-bit+ data acquisition systems.
How does OP284ESZ handle input overvoltage conditions?
The OP284ESZ lacks internal series input resistors. When input voltage exceeds V+ by >1.8 V or falls below V− by >0.6 V, internal junctions conduct, allowing current flow. To prevent damage, external series resistors must limit input current to ≤5 mA - e.g., a 1 kΩ resistor protects against ±5 V overvoltage relative to supplies.
Is OP284ESZ unity-gain stable and what is its phase margin?
Yes, OP284ESZ is explicitly unity-gain stable with a minimum phase margin of 45° at unity gain with 2 kΩ load (Table 2, Rev. J). This ensures unconditional stability in voltage-follower, active filter, and transimpedance configurations without external compensation components.
OP284ESZ 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:
- 4V/µs
- Gain Bandwidth Product:
- 4.25 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 80 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- -
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OP284ESZ FAQ
1.How can I place an order for OP284ESZ through Aetrix?
Please submit a Request for Quotation (RFQ) for OP284ESZ 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 OP284ESZ reliable?
The price and inventory of OP284ESZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP284ESZ is usually 5 days.
3.What payment methods are accepted for OP284ESZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP284ESZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP284ESZ?
OP284ESZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP284ESZ 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 OP284ESZ?
For technical support, including OP284ESZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP284ESZ requirements.
6.How does Aetrix verify that OP284ESZ is sourced from the original manufacturer or authorized distributors?
All OP284ESZ 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 OP284ESZ meets industry standards.
7.What is the process for return or replacement of OP284ESZ?
All OP284ESZ units undergo pre-shipment inspection (PSI). If there is an issue with OP284ESZ, 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 OP284ESZ part is unused and in its original packaging.
Return procedure for OP284ESZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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