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Analog Devices Inc. OP113ESZ
- Part No.:
- OP113ESZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OP113ESZ.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,868
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Product details
Overview
OP113ESZ from Analog Devices is a single-channel, low-noise, low-drift operational amplifier optimized for precision single-supply operation from 4 V to 36 V. It delivers 4.7 nV/√Hz voltage noise density at 1 kHz, 0.2 μV/°C max offset drift, and 3.4 MHz gain bandwidth - enabling high-resolution signal conditioning in battery-powered instrumentation and strain gage interfaces.
For engineers reviewing the OP113ESZ datasheet, OP113ESZ pinout, OP113ESZ application, or OP113ESZ equivalent, key selection criteria include rail-to-rail output swing (to within 1 V of positive rail and near ground), input common-mode range extending to the negative supply, unity-gain stability, and absence of phase reversal under overvoltage conditions.
Technical Context
The OP113ESZ employs a patented bipolar-CMOS hybrid output stage that enables true zero-volt output swing capability in single-supply configurations - unlike conventional bipolar op amps limited to ~10 mV above ground. Its input stage supports common-mode voltages from V− to (V+ − 1 V) across the full supply range (4 V to 36 V).
Designed for systems with internal digital calibration, the OP113ESZ maintains low drift (≤0.8 μV/°C guaranteed) and low 0.1 Hz–10 Hz noise (120 nV p-p) to minimize residual error uncorrectable by processor-based offset/gain trimming - critical for extended-temperature industrial applications (−40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise Density | 4.7 nV/√Hz @ 1 kHz - enables resolution beyond 20-bit ADCs in sigma-delta systems |
| Offset Drift | 0.2 μV/°C typ., ≤0.8 μV/°C max - ensures <1 μV total drift over 85°C temperature span |
| Gain Bandwidth | 3.4 MHz - supports stable closed-loop gain ≥10 up to 300 kHz |
| Output Swing | Swings to within 1 V of V+ and to ground (V−) - maximizes dynamic range on 5 V or 12 V rails |
| Input Range | VCM = V− to (V+ − 1 V) - accepts signals down to ground without level-shifting circuitry |
| Slew Rate | 1.2 V/μs min - supports 10 V step settling in <9 μs to 0.01% |
| PSRR | 103 dB min - rejects supply ripple in noisy embedded power domains |
Pinout & Package
OP113ESZ is housed in an 8-lead narrow-body SOIC_N (SO-8) package with standard industry pinout and no internal connections on pins 1 and 5 (NULL). Pin 1 and Pin 5 support external offset nulling via a 10 kΩ potentiometer referenced to V−.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Null Input A | Connects to wiper of offset-null potentiometer; enables ±2 mV trim range |
| 2 | Inverting Input (−IN) | Differential input node; supports common-mode range to V− |
| 3 | Non-Inverting Input (+IN) | Differential input node; supports common-mode range to V− |
| 4 | Negative Supply (V−) | Ground reference in single-supply mode; must be connected |
| 5 | Null Input B | Connects to one end of offset-null potentiometer; completes null network |
| 6 | Output (OUT) | Class-AB output stage with rail-to-rail swing capability |
| 7 | Positive Supply (V+) | Single-supply rail (4 V to 36 V) or positive rail in dual-supply mode |
| 8 | No Connect (NC) | Internally unused; left floating per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Combines bipolar and CMOS devices to achieve sub-millivolt swing to ground - eliminates need for negative supply in low-voltage sensor interfaces |
| No phase reversal | Guaranteed immunity to output polarity inversion when inputs exceed common-mode range - prevents latch-up in overload conditions |
| Low 0.1–10 Hz noise | 120 nV p-p - preserves DC accuracy in slow-sampling thermocouple and RTD amplifiers |
| Extended common-mode input | VCM includes V− and extends to (V+ − 1 V) - enables direct interfacing to bridge sensors without bias resistors |
| Unity-gain stable | Stable with gain = 1 configuration - simplifies design of buffers and active filters without external compensation |
Applications
| Digital Scale Amplifier | Strain Gage Interface |
|---|---|
Use Scenario: Precision load-cell signal conditioning in commercial and industrial weighing systems operating from 5 V or 12 V supplies. IC Role / Device Role / Timing Role: Single-ended amplifier with differential input, configured as an instrumentation-grade gain stage with CMRR trim capability. Use Value: 4.7 nV/√Hz noise and 0.2 μV/°C drift enable sub-100 μV resolution over full temperature range - directly improving scale repeatability and linearity. | Use Scenario: Low-voltage, single-supply amplification of millivolt-level outputs from bonded foil or semiconductor strain gages. IC Role / Device Role / Timing Role: High-input-impedance buffer and gain stage with rail-to-rail output driving ADC reference or input. Use Value: True zero-swing output and V−-referenced input allow full utilization of 5 V supply - increasing effective SNR by >6 dB versus legacy op amps. |
| RTD Thermometer | Battery-Powered Instrumentation |
Use Scenario: Linearized resistance-to-temperature conversion using 3-wire platinum RTDs (e.g., PT100) in environmental monitoring equipment. IC Role / Device Role / Timing Role: Servo-controlled bridge amplifier with precision feedback for analog linearization and cold-junction compensation. Use Value: 120 nV p-p 0.1–10 Hz noise and <0.5°C system accuracy over −150°C to +500°C - meets Class A RTD tolerance requirements without digital post-processing. | Use Scenario: Portable multimeters, handheld data loggers, and field-deployable sensor nodes powered by alkaline or Li-ion batteries. IC Role / Device Role / Timing Role: Low-quiescent-current (2.7 mA typ.) signal conditioner for transducer front-ends and reference buffers. Use Value: 4 V minimum supply and rail-to-rail I/O extend usable battery life while maintaining full dynamic range down to 3.2 V - reducing need for voltage regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8628ARZ | Zero-drift auto-zero architecture; 0.005 μV/°C drift vs. OP113ESZ's 0.2 μV/°C; higher 1/f noise corner (~10 Hz) | Better long-term DC stability but higher current noise (0.6 pA/√Hz); less suitable for high-Z sensor sources | Select AD8628ARZ when ultra-low drift dominates over low broadband noise and source impedance is <100 kΩ |
| OPA333AIDBVR | Zero-drift chopper; 0.1 μV/°C max drift; 5.5 μV p-p 0.1–10 Hz noise vs. 120 nV p-p; 360 kHz GBW | Lower power (17 μA) but lower bandwidth and higher chopper ripple - unsuitable for audio or fast-settling applications | Select OPA333AIDBVR only for ultra-low-power, sub-100 kHz DC-critical applications where ripple filtering is feasible |
Compared with AD8628ARZ and OPA333AIDBVR, OP113ESZ offers superior broadband noise performance (4.7 nV/√Hz), higher slew rate (1.2 V/μs), and wider bandwidth (3.4 MHz) - making it optimal for high-fidelity sensor signal chains requiring both precision and speed without chopper artifacts.
Availability
OP113ESZ is available at Aetrix Electronics and suitable for digital scales, strain gage interfaces, and battery-powered instrumentation requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OP113ESZ 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.
The OPx13 family - including OP113ESZ - was designed specifically for precision single-supply sensor signal conditioning in industrial, test & measurement, and portable instrumentation systems where low noise, low drift, and rail-to-rail operation are non-negotiable.
FAQ
What is the maximum supply voltage for OP113ESZ?
The absolute maximum supply voltage for OP113ESZ is ±18 V in dual-supply mode or 36 V in single-supply mode, as specified in the Absolute Maximum Ratings table. Continuous operation above these limits risks permanent damage. For reliable long-term use, Analog Devices recommends staying within the recommended operating range of 4 V to 36 V single supply or ±2 V to ±18 V dual supply - with thermal derating applied above 70°C ambient.
Does OP113ESZ require external compensation for unity-gain stability?
No, OP113ESZ is internally compensated and unity-gain stable per its datasheet specification. It achieves a phase margin of 57° at 5 V supply and 72° at ±15 V, ensuring stable operation with closed-loop gains of 1, 10, or 100 without external capacitors or resistors. This eliminates layout complexity and improves reliability in high-density PCB designs where parasitic capacitance could destabilize uncompensated amplifiers.
Can OP113ESZ drive a 600 Ω load effectively?
Yes, OP113ESZ is fully specified for 600 Ω loads: output voltage swing is guaranteed to ±13.9 V (at ±15 V supply) and 3.9 V/8 mV (at 5 V supply), with short-circuit current limit of ±40 mA. Its output stage delivers >±30 mA into 600 Ω while maintaining linearity and low distortion - making it suitable for driving legacy test equipment inputs, coaxial cables, and ADC drivers without external buffering.
Is OP113ESZ pin-compatible with other OPx13 family members?
No - OP113ESZ (single-channel, 8-pin SOIC_N) is not pin-compatible with OP213 (dual-channel, same 8-pin SOIC_N but different pinout) or OP413 (quad-channel, 16-pin SOIC_W). While all share identical electrical specifications and performance characteristics, their pin assignments differ significantly: OP113ESZ uses Pins 1/5 for offset null, whereas OP213 repurposes those pins for second amplifier inputs/outputs. PCB layout must be specific to OP113ESZ.
What is the purpose of the NULL pins (1 and 5) on OP113ESZ?
Pins 1 and 5 on OP113ESZ form the external offset null network: Pin 1 connects to the wiper of a 10 kΩ potentiometer, Pin 5 to one end, and the potentiometer's other end ties to V− (ground in single-supply mode). This configuration provides ±2 mV of adjustable offset correction - useful for eliminating residual system-level offsets when the OP113ESZ's inherent 100 μV max VOS is insufficient. Trim range can be reduced to ±400 μV using a 2 kΩ potentiometer.
OP113ESZ 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:
- 1
- Output Type:
- -
- Slew Rate:
- 1.2V/µs
- Gain Bandwidth Product:
- 3.4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 240 nA
- Voltage - Input Offset:
- 75 µV
- Current - Supply:
- 3mA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OP113ESZ FAQ
1.How can I place an order for OP113ESZ through Aetrix?
Please submit a Request for Quotation (RFQ) for OP113ESZ 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 OP113ESZ reliable?
The price and inventory of OP113ESZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP113ESZ is usually 5 days.
3.What payment methods are accepted for OP113ESZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP113ESZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP113ESZ?
OP113ESZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP113ESZ 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 OP113ESZ?
For technical support, including OP113ESZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP113ESZ requirements.
6.How does Aetrix verify that OP113ESZ is sourced from the original manufacturer or authorized distributors?
All OP113ESZ 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 OP113ESZ meets industry standards.
7.What is the process for return or replacement of OP113ESZ?
All OP113ESZ units undergo pre-shipment inspection (PSI). If there is an issue with OP113ESZ, 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 OP113ESZ part is unused and in its original packaging.
Return procedure for OP113ESZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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