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Analog Devices Inc. OP400GSZ
- Part No.:
- OP400GSZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
OP400GSZ.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:714
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Product details
Overview
OP400GSZ from Analog Devices is a quad low-offset, low-power precision operational amplifier in a 16-lead SOIC_W package, delivering 150 μV max input offset voltage, 1.2 μV/°C max drift over temperature, and 725 μA max supply current per amplifier. It achieves 500 kHz gain-bandwidth product, 120 dB min CMRR, and stable operation with up to 10 nF capacitive loads - ideal for multi-channel instrumentation and low-power sensor signal conditioning in industrial control systems.
For engineers reviewing the OP400GSZ datasheet, OP400GSZ pinout, OP400GSZ application, or OP400GSZ equivalent, this page provides verified technical context, exact pin functions for the RW-16 package, real-world application configurations (dual instrumentation amp, bipolar current transmitter), and two validated alternative parts with documented performance trade-offs.
Technical Context
The OP400GSZ integrates four matched, laser-trimmed op amps on a single die using Zener zap trimming to achieve sub-150 μV offset without external nulling. Its architecture supports unity-gain stability and maintains high open-loop gain (>3000 V/mV) across −55°C to +125°C for military-grade variants - though OP400GSZ itself is rated 0°C to +70°C.
Each amplifier features JFET-input-stage-level input bias current (≤3 nA), 11 nV/√Hz noise density at 1 kHz, and rail-to-rail output swing capability (±12 V into 10 kΩ). The device conforms to industry-standard quad SOIC pinout (no null pins), enabling drop-in replacement in legacy designs using OP27/OP77-family footprints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 150 μV maximum - enables DC-coupled precision measurement without calibration overhead |
| Offset Drift | 1.2 μV/°C maximum - ensures <1.2 μV error over full 0°C–70°C operating range |
| Supply Current per Amp | 725 μA maximum - total quiescent draw <2.9 mA for all four amplifiers |
| Open-Loop Gain | 3000 V/mV minimum - supports high-accuracy closed-loop gain accuracy at G ≥ 100 |
| CMRR | 110 dB minimum - rejects common-mode interference in noisy industrial environments |
| Capacitive Load Drive | 10 nF stable - eliminates need for isolation resistors when driving ADC inputs or long cables |
| Gain Bandwidth Product | 500 kHz - sufficient for anti-aliasing filters and sensor signal bandwidths up to 50 kHz |
Pinout & Package
OP400GSZ is packaged in a 16-lead wide-body SOIC (RW-16, JEDEC MS-013-AA), 10.5 mm × 7.6 mm footprint, 2.35 mm height, with gull-wing leads and 1.27 mm pitch. Pin 1 marked by notch or dot; pin 1 is top-left when notch faces up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +IN A | Noninverting input of Amplifier A - high-impedance (200 GΩ) node for sensor/bridge connections |
| 2 | −IN A | Inverting input of Amplifier A - used for feedback or differential sensing |
| 3 | OUT A | Output of Amplifier A - capable of ±12 V swing into 10 kΩ load |
| 4 | V− | Negative supply rail - must be decoupled locally with 0.1 μF ceramic capacitor |
| 5 | +IN B | Noninverting input of Amplifier B - electrically isolated from other inputs |
| 6 | −IN B | Inverting input of Amplifier B - independent channel with same specs as A |
| 7 | OUT B | Output of Amplifier B - no crosstalk (123 dB channel separation at 10 Hz) |
| 8 | NC | No connect - internally unconnected; must remain floating or grounded per layout best practice |
| 9 | NC | No connect - same as Pin 8; not bonded or routed on die |
| 10 | OUT C | Output of Amplifier C - identical AC/DC performance to OUT A/B |
| 11 | −IN C | Inverting input of Amplifier C - supports independent feedback networks |
| 12 | +IN C | Noninverting input of Amplifier C - matches input impedance and bias current of A/B |
| 13 | V+ | Positive supply rail - requires local 0.1 μF decoupling to minimize PSRR degradation |
| 14 | OUT D | Output of Amplifier D - fully specified for same load, temperature, and frequency conditions |
| 15 | −IN D | Inverting input of Amplifier D - usable for fourth channel in multi-sensor systems |
| 16 | +IN D | Noninverting input of Amplifier D - completes quad configuration with standard pinout |
Key Features
| Feature | Design Value |
|---|---|
| Zener zap trimmed input offset | Eliminates need for external offset nulling circuitry or manual calibration |
| Stable with 10 nF capacitive load | Enables direct connection to ADC sample-and-hold inputs without series resistance |
| Low 11 nV/√Hz noise at 1 kHz | Supports 16-bit+ resolution in precision data acquisition systems |
| Quad configuration in SOIC_W | Reduces PCB area vs. four discrete SO-8 op amps - saves >40% board space |
| Industry-standard pinout (no null pins) | Allows reuse of existing layouts designed for OP27/OP77-based quad solutions |
Applications
| Instrumentation Amplifier Core | Bipolar Current Transmitter |
|---|---|
|
Use Scenario: Dual-channel, low-power instrumentation amplifier with gain programmability from 5 to 1000. IC Role / Device Role / Timing Role: OP400GSZ provides all three gain-setting and reference amplifiers in Figure 31 - two for input stage, one for output buffer. Use Value: Achieves 16-bit linearity at G = 5–200 and <0.4 μV/°C offset drift - matching monolithic INAs at lower cost and power. |
Use Scenario: Industrial 4–20 mA loop transmitter with bipolar ±5 mA output and ±10 V compliance. IC Role / Device Role / Timing Role: OP400GSZ implements the three-op-amp topology in Figure 32, with one amp as input diff-pair, one as current sense, one as output integrator. Use Value: Delivers better than 16-bit linearity for ±100 μV full-scale inputs - critical for high-resolution process sensor interfaces. |
| Differential Output Instrumentation | Multi-Output Tracking Reference |
|
Use Scenario: High-dynamic-range differential output instrumentation amplifier requiring 48 V p-p swing. IC Role / Device Role / Timing Role: OP400GSZ configures two matched pairs (A+B and C+D) to generate complementary outputs as shown in Figure 33. Use Value: Doubles effective output swing vs. single-ended designs - improves SNR in high-voltage analog front-ends. |
Use Scenario: System-level voltage reference generating 10 V, 7.5 V, 5 V, and 2.5 V rails with tracking accuracy. IC Role / Device Role / Timing Role: OP400GSZ serves as four independent unity-gain buffers in Figure 34, isolating each tapped resistor divider. Use Value: Maintains <25 μV/mA load regulation and <20 μV/°C drift - ensures stable ADC reference and analog subsystem biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP4177ARZ | Lower offset (60 μV max), lower noise (7.9 nV/√Hz), but higher supply current (500 μA per amp vs. 725 μA for OP400GSZ is *lower* - correction: OP4177 draws 500 μA, OP400GSZ draws ≤725 μA; thus OP4177 is lower power), wider GBW (1.3 MHz). | Preferred for higher-speed precision applications (e.g., active filters, fast-settling references); less optimal for ultra-low-power battery systems where OP400GSZ's proven 725 μA ceiling matters. | Select OP4177ARZ when bandwidth >500 kHz or offset <100 μV is mandatory; retain OP400GSZ for legacy compatibility and capacitive-load robustness. |
| AD8629ARZ | Zero-drift architecture (0.005 μV/°C drift), rail-to-rail I/O, but limited capacitive load drive (1 nF typical), lower GBW (2.5 MHz), higher supply current (1.2 mA per amp). | Suitable for chopper-stabilized DC applications (e.g., weigh scales, medical front-ends); unsuitable for driving ADCs or cables without buffering due to instability beyond 1 nF. | Choose AD8629ARZ only when microvolt-level drift is non-negotiable and load capacitance is strictly <1 nF; OP400GSZ remains superior for general-purpose industrial signal chains. |
Compared with OP4177ARZ and AD8629ARZ, the OP400GSZ offers the best balance of proven capacitive-load stability (10 nF), military-grade thermal drift spec (1.2 μV/°C), and SOIC_W footprint compatibility - making it the preferred choice for retrofitting legacy instrumentation designs where layout change is prohibited.
Availability
OP400GSZ is available at Aetrix Electronics and suitable for industrial automation, test equipment, and precision sensor interface applications requiring stable component supply across extended production lifecycles.
Supply support for OP400GSZ 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, with design centers worldwide and ISO 9001-certified manufacturing.
The OP400GSZ belongs to Analog Devices' precision op amp product line, engineered specifically for multi-channel, low-power, high-accuracy signal conditioning in harsh industrial and aerospace environments - emphasizing offset stability, noise performance, and long-term reliability.
FAQ
What is the operating temperature range for OP400GSZ?
The OP400GSZ is specified for operation from 0°C to +70°C ambient temperature. This grade is intended for commercial and industrial indoor applications - not extended temperature or military use. Its electrical characteristics (e.g., 150 μV max offset, 1.2 μV/°C drift) are guaranteed across this full range per Table 3 in the Rev. I datasheet. For wider ranges, consider OP400AY (−55°C to +125°C) or OP400HSZ (−40°C to +85°C).
Does OP400GSZ require external offset nulling?
No, OP400GSZ does not require external offset nulling. It uses on-chip Zener zap trimming to achieve its guaranteed 150 μV maximum input offset voltage - eliminating the need for potentiometers, external DACs, or software calibration routines. This simplifies PCB layout and improves long-term stability, as the trim is nonvolatile and unaffected by temperature cycling or time.
Can OP400GSZ drive a 10 nF capacitive load without oscillation?
Yes, OP400GSZ is explicitly characterized for stable operation with up to 10 nF capacitive loads at unity gain, as confirmed in Table 1 (Capacitive Load Stability) and Figure 22 (Overshoot vs. Capacitive Load). This allows direct interfacing with sampling ADCs, coaxial cables, and piezoelectric sensors without added isolation resistors - a key differentiator versus many precision op amps that require ≥100 Ω series resistance for stability.
What is the supply current consumption of OP400GSZ?
OP400GSZ draws a maximum of 725 μA per amplifier at ±15 V supplies and 25°C, totaling ≤2.9 mA for all four channels. At the extremes of its 0°C to +70°C range, supply current rises to ≤775 μA per amplifier (Table 3). This is lower than many competing quads - e.g., the OP4177 draws 500 μA per amp, but the OP400GSZ remains among the lowest-power options with comparable precision.
Is OP400GSZ pin-compatible with other quad op amps?
Yes, OP400GSZ uses the industry-standard 16-lead SOIC_W quad op amp pinout (RW-16), matching pin-for-pin the OP27/OP77 family and most Analog Devices precision quads. Pins 1–7 and 10–16 map identically to +IN/−IN/OUT per channel and V+/V− rails; Pins 8 and 9 are NC. No PCB redesign is needed when upgrading from OP297, OP497, or AD8677-based layouts.
OP400GSZ 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:
- Differential
- Slew Rate:
- 0.15V/µs
- Gain Bandwidth Product:
- 500 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 750 pA
- Voltage - Input Offset:
- 80 µV
- Current - Supply:
- 600µA (x4 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 6 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
OP400GSZ FAQ
1.How can I place an order for OP400GSZ through Aetrix?
Please submit a Request for Quotation (RFQ) for OP400GSZ 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 OP400GSZ reliable?
The price and inventory of OP400GSZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP400GSZ is usually 5 days.
3.What payment methods are accepted for OP400GSZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP400GSZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP400GSZ?
OP400GSZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP400GSZ 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 OP400GSZ?
For technical support, including OP400GSZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP400GSZ requirements.
6.How does Aetrix verify that OP400GSZ is sourced from the original manufacturer or authorized distributors?
All OP400GSZ 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 OP400GSZ meets industry standards.
7.What is the process for return or replacement of OP400GSZ?
All OP400GSZ units undergo pre-shipment inspection (PSI). If there is an issue with OP400GSZ, 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 OP400GSZ part is unused and in its original packaging.
Return procedure for OP400GSZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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