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Analog Devices Inc. OP284ESZ-REEL
- Part No.:
- OP284ESZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OP284ESZ-REEL.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,088
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Product details
Overview
OP284ESZ-REEL 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, 3.9 nV/√Hz voltage noise density, and 65 μV typical input offset voltage at 25°C - enabling high-fidelity signal conditioning in battery-powered instrumentation and DAC output buffering.
For engineers reviewing the OP284ESZ-REEL datasheet, OP284ESZ-REEL pinout, OP284ESZ-REEL application, or OP284ESZ-REEL equivalent, this device supports precision dc accuracy and wideband ac performance in space-constrained industrial and portable systems where rail-to-rail swing, low noise, and thermal stability across −40°C to +125°C are critical selection criteria.
Technical Context
The OP284ESZ-REEL implements a composite input stage with concurrent NPN and PNP differential pairs to achieve true rail-to-rail common-mode input range (0 V to VS) and output swing within 125 mV of each rail at 1 mA load. Its second-stage compound folded cascade architecture provides high open-loop gain (>240 V/mV) and stable unity-gain operation without external compensation.
Output stage design uses complementary emitter-follower topology with active current limiting, delivering ±6.5 mA output drive while maintaining phase margin ≥45° and settling time ≤2.5 μs to 0.01% for 1 V steps. Input bias currents exhibit polarity reversal across the common-mode range, requiring balanced source impedances for optimal CMRR (86 dB typical over 1.0–4.0 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 36 V (or ±1.5 V to ±18 V): Enables direct integration into 3.3 V, 5 V, and 24 V industrial power domains without level-shifting. |
| Gain Bandwidth Product | 4.25 MHz (typ @ ±15 V): Supports stable closed-loop operation up to 100 kHz with gain ≥40, suitable for anti-aliasing and reconstruction filters. |
| Input Offset Voltage | 65 μV (typ @ 25°C, E grade): Ensures <0.01% error in 12-bit DAC buffer applications at room temperature. |
| Voltage Noise Density | 3.9 nV/√Hz @ 1 kHz: Limits integrated noise to ~1.2 μVRMS in 100 kHz bandwidth, critical for sensor front-end amplification. |
| Slew Rate | 4.0 V/μs (typ @ ±15 V): Allows full-scale 10 V output transitions in <2.5 μs, supporting fast-settling data acquisition channels. |
| Common-Mode Rejection | 86 dB (min @ −40°C to +125°C, VCM = 1.0–4.0 V): Maintains accuracy in noisy industrial environments with ground shifts. |
| Operating Temperature | −40°C to +125°C extended industrial range: Qualified for under-hood automotive sensors and factory automation control modules. |
Pinout & Package
OP284ESZ-REEL is packaged in an 8-lead SOIC (S-Suffix), surface-mount package with standard JEDEC MS-012AC footprint (5.3 mm × 6.2 mm, 1.75 mm height). Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output node; capable of sourcing/sinking ±6.5 mA while swinging within 125 mV of V− and 200 mV of V+. |
| 2 | −IN A | Inverting input of Amplifier A; part of composite NPN/PNP input pair enabling rail-to-rail common-mode range. |
| 3 | +IN A | Non-inverting input of Amplifier A; exhibits polarity-reversing input bias current requiring matched source impedance. |
| 4 | V− | Negative supply terminal; accepts GND (single-supply) or negative rail (dual-supply); must be decoupled with 0.1 μF ceramic capacitor. |
| 5 | +IN B | Non-inverting input of Amplifier B; electrically isolated from Channel A but shares same substrate and thermal path. |
| 6 | −IN B | Inverting input of Amplifier B; identical electrical behavior to Pin 2, with channel separation >120 dB @ 1 kHz. |
| 7 | OUT B | Amplifier B output node; independent output stage with same drive capability and rail-swing limits as Pin 1. |
| 8 | V+ | Positive supply terminal; supports up to 36 V; PSRR of 90 dB ensures immunity to supply ripple in mixed-signal systems. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Supports full-scale signal handling from 0 V to VS on inputs and within 125 mV of rails on outputs - eliminates need for level-shifting in 3.3 V microcontroller interfaces. |
| Low 1/f noise corner | 0.3 μV p-p (0.1 Hz to 10 Hz): Enables stable dc-coupled amplification of slow-moving sensor signals (e.g., thermocouples, strain gauges) without drift-induced errors. |
| Unity-gain stable | No external compensation required for gains ≥1; simplifies PCB layout and reduces BOM count in voltage-follower and buffer configurations. |
| High slew rate / bandwidth ratio | 4.0 V/μs slew rate with 4.25 MHz GBW enables clean 100 kHz sine wave reproduction at ±5 V swing - critical for audio preamps and telecom line drivers. |
| Robust ESD protection | ±2 kV HBM rating per JESD22-A114; internal diode clamps limit input fault current to safe levels when series resistors are added per Figure 47. |
Applications
| Battery-Powered Instrumentation | DAC Output Amplifier |
|---|---|
Use Scenario: Portable multimeter front-end amplifying mV-level sensor outputs with 16-bit ADC digitization. IC Role / Device Role / Timing Role: Precision dc-coupled gain stage with rail-to-rail input to capture full sensor dynamic range and rail-to-rail output to maximize ADC utilization. Use Value: 65 μV offset and 3.9 nV/√Hz noise ensure <0.005% measurement error and sub-LSB noise floor in 100 kHz bandwidth. |
Use Scenario: Buffering 12-bit voltage-output DAC (e.g., AD5621) driving 2 kΩ load in PLC analog output module. IC Role / Device Role / Timing Role: Low-offset, low-noise unity-gain buffer isolating DAC from load variations while preserving monotonicity. Use Value: 125 mV output low voltage at 1 mA ensures full 0–5 V swing from 5 V supply, eliminating headroom loss in single-rail systems. |
| Power Supply Control and Protection | ADC Input Buffer |
Use Scenario: Current-sense amplifier in 24 V DC-DC converter feedback loop monitoring 10 mΩ shunt at 10 A. IC Role / Device Role / Timing Role: High-CMRR differential amplifier rejecting switching noise while amplifying 100 mV sense voltage. Use Value: 86 dB CMRR at 100 kHz suppresses PWM noise; 4 MHz bandwidth supports fast overcurrent response (<10 μs detection). |
Use Scenario: Driving SAR ADC (e.g., AD7980) input with 100 kSPS sampling, requiring low charge kickback and fast settling. IC Role / Device Role / Timing Role: Track-and-hold driver with 2.5 μs 0.01% settling time ensuring accurate sample acquisition at full throughput. Use Value: 4.0 V/μs slew rate and 2.4 V/μs minimum slew guarantee <1 LSB error during 12-bit acquisition windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP2177ARZ-REEL | Lower offset (25 μV typ), lower noise (2.9 nV/√Hz), but narrower GBW (1.3 MHz) and no rail-to-rail output (clips 1.2 V from rails). | Better for ultra-precision dc sensing (e.g., weigh scales), unsuitable for rail-swing DAC buffering or single-supply signal chains requiring full output range. | Select OP2177ARZ-REEL only when dc accuracy dominates ac performance requirements and supply headroom permits non-rail output. |
| AD8605ARTZ-REEL7 | Higher GBW (10 MHz), lower supply current (1 mA), but higher offset (60 μV typ) and limited temp range (−40°C to +125°C not guaranteed). | Better for high-speed filtering and active anti-aliasing, less suitable for hot-environment industrial control where guaranteed 125°C operation is mandatory. | Select AD8605ARTZ-REEL7 when bandwidth >4 MHz is required and ambient temperature stays below 105°C. |
Compared with OP2177ARZ-REEL and AD8605ARTZ-REEL7, OP284ESZ-REEL uniquely balances rail-to-rail I/O, 4 MHz bandwidth, and guaranteed −40°C to +125°C operation - making it the only choice for ruggedized portable instrumentation and industrial DAC/ADC interface designs demanding both precision and full supply utilization.
Availability
OP284ESZ-REEL 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 ranges and long production lifecycles.
Supply support for OP284ESZ-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 OP284ESZ-REEL belongs to the OPx84 family of precision rail-to-rail op amps designed specifically for portable instrumentation and single-supply industrial signal conditioning where simultaneous ac fidelity and dc accuracy are non-negotiable.
FAQ
What is the maximum supply voltage for OP284ESZ-REEL?
The OP284ESZ-REEL supports a 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 both V+ and V− pins. Operation beyond these limits risks permanent damage. For reliable long-term use in 24 V industrial systems, derating to ≤33 V is recommended per Analog Devices reliability guidelines.
Does OP284ESZ-REEL support true rail-to-rail input and output?
Yes, OP284ESZ-REEL provides true rail-to-rail input common-mode range (0 V to VS) and rail-to-rail output swing (within 125 mV of V− and 200 mV of V+ at 1 mA load). This is achieved via a composite NPN/PNP input stage and a unique complementary output topology - confirmed in Figures 44 and 45 of the Rev. J datasheet.
What is the guaranteed input offset voltage over temperature for OP284ESZ-REEL?
For the E-grade OP284ESZ-REEL, input offset voltage is guaranteed ≤165 μV over the full −40°C to +125°C operating range. At 25°C, typical VOS is 65 μV, with drift specified at 0.2–2.0 μV/°C. These values are measured per Table 2 and Figure 8 in the Rev. J datasheet and apply directly to the OP284ESZ-REEL variant.
Can OP284ESZ-REEL drive capacitive loads without oscillation?
OP284ESZ-REEL is unity-gain stable but exhibits increasing overshoot with capacitive loads: Figure 30 shows ≤10% overshoot with 100 pF load and ±2.5 V supply. For loads >100 pF, external isolation resistance (e.g., 10–100 Ω in series with output) is recommended to maintain phase margin ≥45°, as verified in transient response testing (Figures 39–42).
Is OP284ESZ-REEL pin-compatible with other dual op amps in SOIC-8 packages?
No, OP284ESZ-REEL has a proprietary pinout (OUT A, −IN A, +IN A, V−, +IN B, −IN B, OUT B, V+) that differs from industry-standard dual op amps like LM358 or AD8605. Substitution requires PCB layout revision. Pin compatibility is not claimed in the datasheet or Analog Devices documentation for any alternate part.
OP284ESZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-REEL FAQ
1.How can I place an order for OP284ESZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for OP284ESZ-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 OP284ESZ-REEL reliable?
The price and inventory of OP284ESZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP284ESZ-REEL is usually 5 days.
3.What payment methods are accepted for OP284ESZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP284ESZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP284ESZ-REEL?
OP284ESZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP284ESZ-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 OP284ESZ-REEL?
For technical support, including OP284ESZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP284ESZ-REEL requirements.
6.How does Aetrix verify that OP284ESZ-REEL is sourced from the original manufacturer or authorized distributors?
All OP284ESZ-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 OP284ESZ-REEL meets industry standards.
7.What is the process for return or replacement of OP284ESZ-REEL?
All OP284ESZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with OP284ESZ-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 OP284ESZ-REEL part is unused and in its original packaging.
Return procedure for OP284ESZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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