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Analog Devices Inc. OP490GSZ
- Part No.:
- OP490GSZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
OP490GSZ.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,294
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Product details
Overview
OP490GSZ from Analog Devices is a low-voltage, micropower quad operational amplifier in 16-lead SOIC_W package, operating from single supply (1.6 V to 36 V) or dual supplies (±0.8 V to ±18 V), with input and output voltage ranges including ground, 80 μA maximum total supply current, and 1.0 mV maximum input offset voltage - used in battery-powered portable instruments and remote sensor signal conditioning.
For engineers reviewing the OP490GSZ datasheet, OP490GSZ pinout, OP490GSZ application, or OP490GSZ equivalent, key selection criteria include rail-to-rail input/output capability in single-supply mode, ultra-low quiescent current per amplifier (<20 μA), high open-loop gain (≥400 V/mV), channel separation >120 dB, and compatibility with lithium-cell power sources (3 V nominal).
Technical Context
The OP490GSZ integrates four independent PNP-input op amps on a single die, each featuring active pull-down output stage enabling true zero-output swing with ≤500 μV low-level output voltage at 10 kΩ load, and input protection allowing ±20 V beyond supply rails. Its architecture supports stable operation with capacitive loads up to 650 pF and delivers ≥5 mA output drive per amplifier.
It achieves 20 kHz gain-bandwidth product and 5–12 V/ms slew rate while maintaining <60 nV/√Hz voltage noise density at 1 kHz and <0.07 pA/√Hz current noise density - optimized for precision, low-power DC and low-frequency AC signal amplification in space-constrained, energy-sensitive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 1.6 V to 36 V single supply or ±0.8 V to ±18 V dual supply - enables direct interface with 3 V lithium cells and industrial 24 V rails without regulation. |
| Total Supply Current | 60–80 μA at ±15 V - allows continuous operation for hundreds of hours on a 1 Ah lithium cell. |
| Input Offset Voltage | 0.6–1.0 mV max at 25°C - ensures sub-millivolt DC error in precision sensor front-ends and DAC buffers. |
| Open-Loop Gain | 400–800 V/mV at ±15 V, RL = 100 kΩ - provides ≥112 dB loop gain for accurate closed-loop gain setting. |
| Output Swing (Single-Supply) | 0 V to 4.2 V at V+ = 5 V, RL = 2 kΩ - supports true zero-in/zero-out operation with active pull-down to ground. |
| CMRR / PSRR | 90–120 dB CMRR and 3.2–10 μV/V PSRR - minimizes error from common-mode shifts and supply ripple in noisy environments. |
| Gain-Bandwidth Product | 20 kHz - sufficient for anti-aliasing, sensor filtering, and programmable-gain amplifier feedback loops up to ~10 kHz. |
Pinout & Package
OP490GSZ is housed in a 16-lead SOIC_W (RW-16) package, 10.5 mm × 7.6 mm × 2.35 mm body, RoHS-compliant, with standard industry quad op amp pinout and two no-connect (NC) pins (Pins 7 and 10).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load; capable of 5 mA sink/source and rail-to-rail swing in single-supply mode. |
| 2 | –IN A | Inverting input of Amp A - PNP input stage with series protection resistors enabling ±20 V overvoltage tolerance. |
| 3 | +IN A | Noninverting input of Amp A - shares same input voltage range as –IN A; includes ground in single-supply operation. |
| 4 | V+ | Positive supply rail - accepts 1.6 V to 36 V; powers all four amplifiers simultaneously. |
| 5 | +IN B | Noninverting input of Amp B - electrically isolated from other channels; supports independent signal routing. |
| 6 | –IN B | Inverting input of Amp B - matched bias and offset characteristics to Amp A for consistent multi-channel performance. |
| 7 | NC | No connect - unused terminal; must be left floating or tied to ground per PCB layout best practices. |
| 8 | OUT B | Amplifier B output - identical drive capability and output swing specification as OUT A. |
| 9 | –IN C | Inverting input of Amp C - part of third independent amplifier; supports differential or single-ended configurations. |
| 10 | NC | No connect - unused terminal; no internal connection; avoid routing signals or vias to this pad. |
| 11 | +IN C | Noninverting input of Amp C - maintains same input common-mode range and protection as other inputs. |
| 12 | OUT C | Amplifier C output - fully specified for 5 mA drive and low-VOL (≤500 μV) near ground. |
| 13 | V− | Negative supply rail - required for dual-supply operation; grounded in single-supply mode. |
| 14 | +IN D | Noninverting input of Amp D - fourth independent channel; matches input impedance (20 GΩ common-mode) of others. |
| 15 | –IN D | Inverting input of Amp D - supports high-impedance sensing with <25 nA input bias current at 25°C. |
| 16 | OUT D | Amplifier D output - completes quad functionality; enables simultaneous processing of four analog signals. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output (single-supply) | Enables zero-in/zero-out operation with V+ = 5 V and V− = 0 V - eliminates level-shifting circuitry in portable designs. |
| Ultra-low quiescent current | 60–80 μA total for all four amplifiers - extends battery life in always-on remote sensors and handheld meters. |
| High channel separation | 120–150 dB at 10 Hz - prevents crosstalk between adjacent amplifiers in multi-channel data acquisition systems. |
| Input overvoltage protection | ±20 V beyond supply rails - protects against ESD and transient faults without external clamping diodes. |
| Stable with capacitive loads | Up to 650 pF - supports direct driving of ADC input capacitors and long cables without oscillation. |
| Low 1/f noise | 3 μV p-p (0.1 Hz to 10 Hz) - critical for precision DC measurements in weigh scales and medical instrumentation. |
Applications
| Portable Battery-Powered Instrumentation | Lithium-Cell Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Handheld multimeter front-end amplifying microvolt-level thermocouple or strain gauge signals. IC Role / Device Role / Timing Role: Quad amplifier providing simultaneous gain, filtering, and buffer functions across four measurement channels. Use Value: 80 μA total supply current enables >300-hour operation on a single 3 V/1 Ah lithium cell, reducing maintenance frequency. |
Use Scenario: Remote environmental sensor node measuring temperature, humidity, and pressure with analog outputs. IC Role / Device Role / Timing Role: Signal conditioner interfacing transducer outputs to low-power SAR ADCs in single-supply configuration. Use Value: Input voltage range including ground and rail-to-rail output allow full-scale utilization of 0–3 V ADC reference without external biasing. |
| Micropower Programmable-Gain Amplifier | Quad Voltage-Output DAC Buffer |
|
Use Scenario: Industrial IoT node adjusting gain dynamically via microcontroller-controlled DAC to handle varying sensor output ranges. IC Role / Device Role / Timing Role: Four independent amplifiers configured with DAC8408 feedback networks to implement digitally selectable gains (1× to 256×). Use Value: Total system quiescent current remains ≤140 μA - preserves battery life while enabling adaptive signal scaling. |
Use Scenario: Precision calibration subsystem generating four independent analog setpoints for actuator control in test equipment. IC Role / Device Role / Timing Role: Output buffer isolating DAC8408 current outputs and delivering rail-to-rail voltage outputs with low output impedance. Use Value: 5 mA output drive and ≤500 μV VOL ensure accurate loading of 10 kΩ reference circuits and eliminate gain error from DAC output resistance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP484FSZ | Higher supply current (120 μA typ), wider GBWP (4.5 MHz), lower offset (125 μV max) - trades micropower for speed and precision. | Better suited for higher-frequency sensor interfaces (>100 kHz) but incompatible with ultra-low-power battery lifetime targets. | Select OP484FSZ only when bandwidth >100 kHz or offset <200 μV is mandatory; OP490GSZ remains optimal for sub-20 kHz, sub-100 μA applications. |
| AD8604ARUZ | Rail-to-rail I/O, 50 μA per amp (200 μA total), 8 MHz GBWP, 600 μV offset max - higher speed and lower offset, but 2.5× higher total current than OP490GSZ. | Preferred for mixed-signal SoC interfaces requiring fast settling, but not viable for multi-year battery operation. | Choose AD8604ARUZ for high-speed data acquisition where power budget allows ≥200 μA; OP490GSZ is superior for longevity-critical deployments. |
Compared with OP484FSZ and AD8604ARUZ, the OP490GSZ uniquely balances micropower operation (≤80 μA total), ground-sensing input, and rail-to-rail output in a single device - making it irreplaceable in applications demanding both multi-year battery life and true zero-reference signal processing.
Availability
OP490GSZ is available at Aetrix Electronics and suitable for portable instrumentation, remote sensor nodes, and micropower programmable-gain amplifier designs requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for OP490GSZ 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, headquartered in Norwood, MA, with design and manufacturing expertise spanning over 50 years.
The OP490GSZ belongs to Analog Devices' precision micropower op amp product line, engineered specifically for battery- and solar-powered applications where ultra-low quiescent current, wide supply range, and robust input/output voltage coverage are essential.
FAQ
What is the maximum capacitive load the OP490GSZ can drive stably?
The OP490GSZ is specified for stable operation with capacitive loads up to 650 pF under unity-gain conditions. This value is verified in the Electrical Characteristics table and confirmed in Typical Performance Characteristic Figure 17 (small-signal transient response). Driving larger capacitive loads may cause peaking or oscillation unless compensated with series resistance or isolation techniques. For OP490GSZ-based ADC driver designs, this rating supports direct connection to most 12–16-bit SAR ADC input capacitors without added stability circuitry.
Does the OP490GSZ support true rail-to-rail output swing when powered from a 3.3 V single supply?
Yes, the OP490GSZ delivers rail-to-rail output swing down to within 100–500 μV of ground and up to within ~0.8 V of V+, as confirmed by VOL and VOH specifications in Table 1. At V+ = 3.3 V, typical VOH is ~2.5 V and VOL is ≤500 μV - meaning it reaches near-ground but not full V+. However, its active pull-down stage ensures functional zero-output capability with appropriate load conditions, making OP490GSZ suitable for 3.3 V logic-compatible analog interfaces where true ground-referenced output is required.
Can the OP490GSZ operate from a single 1.8 V supply?
Yes, the OP490GSZ is explicitly rated for single-supply operation from 1.6 V to 36 V, as stated in the General Description and Absolute Maximum Ratings sections. At 1.8 V, it maintains functional input common-mode range (including ground) and delivers usable output swing (typically ~0.1 V to ~1.7 V), though open-loop gain and slew rate degrade moderately. This capability makes OP490GSZ viable for emerging ultra-low-voltage sensor nodes powered by coin cells or energy-harvesting sources, where other quad op amps fail to start or behave predictably.
How does the input protection scheme of the OP490GSZ work, and what overvoltage levels does it tolerate?
The OP490GSZ uses a PNP input stage with integrated series protection resistors on both inverting and noninverting inputs, enabling survival of input voltages up to ±20 V beyond either supply rail - per Absolute Maximum Ratings Table 3. This architecture eliminates need for external clamping diodes in most industrial and automotive sensor interfaces. The protection operates without latch-up or parametric shift, preserving OP490GSZ functionality even after repeated exposure to transient overvoltages common in field-deployed equipment.
Is the OP490GSZ pin-compatible with other quad op amps in SOIC-16 packages, such as the LM324 or TLV2464?
No, the OP490GSZ is not pin-compatible with LM324 or TLV2464. While all three use 16-lead SOIC packages, OP490GSZ follows industry-standard quad op amp pinout (OUT A, –IN A, +IN A, V+, +IN B, –IN B, NC, OUT B, –IN C, NC, +IN C, OUT C, V−, +IN D, –IN D, OUT D), whereas LM324 uses different pin assignments (e.g., V− on Pin 4, V+ on Pin 8) and TLV2464 places V− on Pin 4 and V+ on Pin 13. Direct substitution would require PCB redesign. Always verify pin mapping using the Functional Block Diagrams in the OP490 datasheet before replacement.
OP490GSZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 0.012V/µs
- Gain Bandwidth Product:
- 20 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 4.2 nA
- Voltage - Input Offset:
- 600 µV
- Current - Supply:
- 60µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 1.6 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
OP490GSZ FAQ
1.How can I place an order for OP490GSZ through Aetrix?
Please submit a Request for Quotation (RFQ) for OP490GSZ 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 OP490GSZ reliable?
The price and inventory of OP490GSZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP490GSZ is usually 5 days.
3.What payment methods are accepted for OP490GSZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP490GSZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP490GSZ?
OP490GSZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP490GSZ 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 OP490GSZ?
For technical support, including OP490GSZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP490GSZ requirements.
6.How does Aetrix verify that OP490GSZ is sourced from the original manufacturer or authorized distributors?
All OP490GSZ 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 OP490GSZ meets industry standards.
7.What is the process for return or replacement of OP490GSZ?
All OP490GSZ units undergo pre-shipment inspection (PSI). If there is an issue with OP490GSZ, 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 OP490GSZ part is unused and in its original packaging.
Return procedure for OP490GSZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OP490GSZ Tags
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