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Analog Devices Inc. OP284CHIPS
- Part No.:
- OP284CHIPS
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- Die
- Datasheet:
-
OP284CHIPS.pdf
- Description:
- DIE
- Quantity:
- Payment:
- Shipping:
Inventory:3,500
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Product details
Overview
OP284CHIPS from Analog Devices is a dual-channel, precision rail-to-rail input and output operational amplifier optimized for single-supply operation from 3 V to 36 V (±1.5 V to ±18 V). It delivers 4 MHz gain bandwidth, 65 μV typical input offset voltage (E grade), 4.0 V/μs slew rate, and 3.9 nV/√Hz voltage noise density - enabling high-fidelity signal conditioning in battery-powered instrumentation and DAC output buffering.
For engineers reviewing the OP284CHIPS datasheet, OP284CHIPS pinout, OP284CHIPS application, or OP284CHIPS equivalent, this device is selected for precision analog front-ends requiring simultaneous ac bandwidth, dc accuracy, low-noise performance, and full rail-to-rail swing in space-constrained dual-amplifier configurations.
Technical Context
The OP284CHIPS 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) and output swing within 125 mV of either rail at 1 mA load. Its second-stage compound folded cascade architecture enables unity-gain stability while maintaining 4.0 V/μs slew rate and 4.25 MHz GBP under ±15 V supply conditions.
Input bias currents exhibit polarity reversal across the common-mode range due to summed base currents of complementary transistor pairs - requiring matched source impedances on +IN and −IN for optimal CMRR (86 dB min over 1.0–4.0 V) and offset stability. Output short-circuit current is internally limited to ±20 mA with thermal foldback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 36 V (or ±1.5 V to ±18 V): supports wide-input industrial and portable systems without level-shifting. |
| Input Offset Voltage (E Grade) | 65 μV typ @ 25°C, 165 μV max over −40°C to +125°C: enables sub-0.1% error in 12-bit+ precision sensor interfaces. |
| Gain Bandwidth Product | 4.25 MHz @ ±15 V: allows stable closed-loop gain ≥10 up to ~400 kHz for anti-aliasing or active filtering. |
| Slew Rate | 4.0 V/μs @ ±15 V, RL = 2 kΩ: supports 10 V p-p signals up to ~640 kHz without slew-induced distortion. |
| Voltage Noise Density | 3.9 nV/√Hz @ 1 kHz: ensures <1.2 μV RMS integrated noise in 100 kHz bandwidth, critical for low-level transducer amplification. |
| Output Swing | Within 125 mV of rails @ 1 mA load: preserves dynamic range in 3 V–5 V single-supply data acquisition systems. |
| Operating Temperature | −40°C to +125°C (extended industrial): qualified for under-hood automotive sensors and industrial motor control feedback loops. |
Pinout & Package
OP284CHIPS is supplied as a die (bare chip) in wafer form - no molded package. The pinout corresponds to the standard 8-lead SOIC (S-suffix) footprint, with identical terminal mapping and electrical behavior as the packaged OP284. This enables direct integration into custom hybrid modules or flip-chip assemblies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Capable of sourcing/sinking ±6.5 mA (min) while swinging rail-to-rail; requires external compensation for capacitive loads >300 pF. |
| 2 (−IN A) | Inverting input A | High-impedance node (60–450 nA bias current); must be impedance-matched to +IN A to minimize offset drift. |
| 3 (+IN A) | Non-inverting input A | Same bias current profile as −IN A; mismatch >1 kΩ causes >1 μV/°C effective offset drift. |
| 4 (V−) | Negative supply rail | Accepts ground or negative voltage; input common-mode extends to V−; output swings to within 125 mV of V−. |
| 5 (V+) | Positive supply rail | Accepts 3–36 V or ±1.5–±18 V; PSRR = 90 dB min over −40°C to +125°C ensures immunity to supply ripple. |
| 6 (+IN B) | Non-inverting input B | Independent channel with identical specs; enables dual-path signal processing without cross-talk (140 dB channel separation @ 1 kHz). |
| 7 (−IN B) | Inverting input B | Electrically isolated from Channel A; shares same bias current characteristics and matching requirements. |
| 8 (OUT B) | Amplifier B output | Functionally identical to OUT A; supports independent gain/feedback networks per channel. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-scale signal utilization in 3 V systems - e.g., 0–3 V sensor outputs amplified to 0–3 V ADC inputs without level shifters. |
| Low 3.9 nV/√Hz voltage noise | Permits clean amplification of microvolt-level piezoelectric or thermopile signals without degrading SNR in 100 kHz bandwidth. |
| 4.0 V/μs slew rate at ±15 V | Supports fast-settling (≤4 µs to 0.01%) step responses for precision DAC buffers driving 12-bit+ converters. |
| −40°C to +125°C operation | Validated for use in engine control units, industrial PLC I/O modules, and downhole sensing where ambient temperature exceeds 105°C. |
| Unity-gain stable | Eliminates need for external compensation in voltage-follower, active filter, or transimpedance configurations - reducing BOM count. |
Applications
| Battery-Powered Instrumentation | DAC Output Amplifier |
|---|---|
|
Use Scenario: Portable multimeter front-end amplifying mV-range thermocouple or shunt voltage signals with 16-bit resolution. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with rail-to-rail input to capture full sensor range and rail-to-rail output to drive SAR ADC reference buffer. Use Value: 65 μV offset and 3.9 nV/√Hz noise ensure ≤0.02% measurement error and >90 dB SNR at 10 kHz bandwidth. |
Use Scenario: Post-filtering 12-bit current-steering DAC output to drive 50 Ω coaxial cable in automated test equipment. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate buffer isolating DAC core from reactive load while preserving monotonicity and settling time. Use Value: 4.0 V/μs slew rate achieves <4 µs 0.01% settling on 10 V steps, preventing code-dependent glitches in high-speed waveform generation. |
| Power Supply Control and Protection | ADC Input Buffer |
|
Use Scenario: Voltage error amplifier in isolated DC-DC converter feedback loop regulating 5 V output from 12 V input. IC Role / Device Role / Timing Role: High-PSRR (90 dB) comparator-compatible amplifier comparing sensed output against precision reference in noisy switching environment. Use Value: 90 dB PSRR rejects 100 mVpp switching ripple at 500 kHz, limiting regulation error to <100 μV under transient load steps. |
Use Scenario: Driving 1 MSps successive-approximation ADC with 12-bit internal capacitor array requiring low-impedance, low-charge-injection source. IC Role / Device Role / Timing Role: Unity-gain stable follower presenting <1 Ω output impedance to hold ADC sampling capacitor during acquisition phase. Use Value: Rail-to-rail output swing and 125 mV headroom enable full 0–5 V input range utilization without clipping at supply extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8672ARZ | Lower offset (12 μV typ), lower noise (2.8 nV/√Hz), but narrower GBW (10 MHz) and no rail-to-rail input (CMVR = 1 V to VS−1.2 V). | Preferred for ultra-low-offset DC-critical applications (e.g., strain gauge bridges); unsuitable for 0–VS input sensing like Hall effect sensors. | Select AD8672ARZ when offset drift and long-term stability dominate; choose OP284CHIPS when rail-to-rail input and wide supply range are mandatory. |
| OP297GPZ | Lower input bias current (100 pA max), higher CMRR (120 dB), but slower slew rate (0.15 V/μs) and lower GBW (500 kHz). | Better for high-impedance pH or ion-selective electrode buffers; too slow for DAC buffering or active filters above 10 kHz. | Select OP297GPZ for femtoampere-level source impedances; OP284CHIPS remains optimal for mixed-signal systems needing bandwidth + precision + rail-to-rail operation. |
Compared with AD8672ARZ and OP297GPZ, OP284CHIPS uniquely balances rail-to-rail input/output, 4 MHz bandwidth, and 65 μV offset - making it the only dual op amp in its class capable of replacing both legacy bipolar and JFET types in single-supply 3–36 V systems without sacrificing speed or dc accuracy.
Availability
OP284CHIPS is available at Aetrix Electronics and suitable for battery-powered instrumentation, power supply control and protection, and DAC output amplification requiring stable component supply across extended temperature and voltage ranges.
Supply support for OP284CHIPS 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 OP284CHIPS belongs to the OPx84 precision op amp family, designed specifically for portable instrumentation and single-supply industrial systems demanding simultaneous ac bandwidth, dc accuracy, and rail-to-rail signal handling.
FAQ
What is the maximum operating supply voltage for OP284CHIPS?
The OP284CHIPS supports a total supply voltage range of 3 V to 36 V (single-supply) or ±1.5 V to ±18 V (dual-supply). Absolute maximum ratings specify ±18 V on V+ and V− pins - exceeding this risks permanent damage. Operation at 36 V single-supply is validated across −40°C to +125°C with no derating required.
Does OP284CHIPS require external compensation for unity-gain stability?
No - the OP284CHIPS is internally compensated for unity-gain stability across its full supply and temperature range. No external capacitors or resistors are needed for stable operation in voltage-follower, inverting, or non-inverting configurations with gain ≥1. This simplifies layout and reduces component count in precision analog signal chains.
What is the input common-mode voltage range of OP284CHIPS?
The OP284CHIPS features true rail-to-rail input: the common-mode voltage range extends from V− to V+, i.e., 0 V to 36 V (or −18 V to +18 V). This allows direct interfacing with sensors whose output spans the full supply - such as resistive bridge outputs or Hall-effect devices - without external level-shifting circuitry.
How does the input bias current behavior affect PCB layout for OP284CHIPS?
OP284CHIPS exhibits polarity-reversing input bias currents across the common-mode range due to its complementary NPN/PNP input stage. To prevent offset drift >1 μV/°C, the Thévenin impedances seen by +IN and −IN must be matched within 1% (typically ≤1 kΩ difference). Use symmetric trace lengths and identical series resistors if present on both inputs.
Is OP284CHIPS suitable for driving ADC inputs with sample-and-hold capacitors?
Yes - the OP284CHIPS provides rail-to-rail output swing, low 125 mV saturation voltage, and 4.0 V/μs slew rate, enabling fast settling (<4 µs to 0.01%) into typical 10–20 pF ADC input capacitances. Its low 3.9 nV/√Hz noise also prevents degradation of effective resolution in 12-bit+ converters.
OP284CHIPS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Tray
- 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:
- -
- Voltage - Input Offset:
- -
- 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:
- Die
OP284CHIPS FAQ
1.How can I place an order for OP284CHIPS through Aetrix?
Please submit a Request for Quotation (RFQ) for OP284CHIPS 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 OP284CHIPS reliable?
The price and inventory of OP284CHIPS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP284CHIPS is usually 5 days.
3.What payment methods are accepted for OP284CHIPS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP284CHIPS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP284CHIPS?
OP284CHIPS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP284CHIPS 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 OP284CHIPS?
For technical support, including OP284CHIPS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP284CHIPS requirements.
6.How does Aetrix verify that OP284CHIPS is sourced from the original manufacturer or authorized distributors?
All OP284CHIPS 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 OP284CHIPS meets industry standards.
7.What is the process for return or replacement of OP284CHIPS?
All OP284CHIPS units undergo pre-shipment inspection (PSI). If there is an issue with OP284CHIPS, 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 OP284CHIPS part is unused and in its original packaging.
Return procedure for OP284CHIPS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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