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Texas Instruments OPA330AIDR
- Part No.:
- OPA330AIDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA330AIDR.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,748
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Product details
Overview
OPA330AIDR from Texas Instruments is a single-channel, zero-drift CMOS operational amplifier optimized for precision, low-power, rail-to-rail input/output operation across 1.8 V to 5.5 V supply. It delivers 50 µV max offset voltage, 0.25 µV/°C max drift, 35 µA max quiescent current, and 350 kHz gain-bandwidth - enabling high-accuracy signal conditioning in battery-powered medical sensors and portable instrumentation.
For engineers reviewing the OPA330AIDR datasheet, OPA330AIDR pinout, OPA330AIDR application, or OPA330AIDR equivalent, this page provides verified specifications, SOIC-8 package details, real-world use cases in current sensing and temperature measurement, and two validated alternative parts with documented functional and layout implications.
Technical Context
The OPA330AIDR implements a proprietary auto-calibration architecture that continuously corrects input offset and drift without chopper-induced ripple or intermodulation artifacts. Its dual-stage chopping circuit (CHOP1 + CHOP2) combined with notch filtering suppresses 1/f noise while maintaining flat noise density down to 0.1 Hz.
This amplifier operates as a unity-gain stable, single-supply precision op amp with rail-to-rail input extending 100 mV beyond V– and V+, rail-to-rail output swinging within 100 mV of both rails, and internal EMI filtering via 10-kΩ on-chip resistors at each input terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 50 µV maximum - ensures ≤0.5 mV error in 10 V full-scale systems without trimming |
| Drift vs Temperature | 0.25 µV/°C maximum - limits offset shift to <3 µV over –40°C to +125°C industrial range |
| Quiescent Current | 35 µA maximum - enables >1-year battery life in 10 µA sleep-mode sensor nodes |
| Supply Range | 1.8 V to 5.5 V - supports direct Li-ion (3.0–4.2 V), coin-cell (1.8–3.0 V), and regulated 3.3 V/5 V rails |
| Gain-Bandwidth | 350 kHz - sufficient for DC–100 Hz sensor amplification with ≥40 dB closed-loop gain margin |
| Input Noise (0.1–10 Hz) | 1.1 µVPP - preserves resolution in 16-bit ADC interfaces with <1 LSB noise contribution |
| CMRR | 115 dB typical - rejects >100 mV common-mode interference in unshielded transducer wiring |
Pinout & Package
OPA330AIDR is supplied in an 8-pin SOIC package (body size 4.90 mm × 3.91 mm) with exposed thermal pad connected internally to V–. Pin 1 is marked by a beveled corner or dot; pin numbering follows standard SOIC convention (counterclockwise from top-left).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives loads ≥10 kΩ; limited to ±5 mA short-circuit current |
| 2 | –IN | Inverting input - connects to feedback network or signal inversion point |
| 3 | +IN | Noninverting input - accepts high-impedance sensor signals up to V– – 0.1 V / V+ + 0.1 V |
| 4 | V– | Negative supply - must be connected; serves as reference for thermal pad and internal biasing |
| 5 | NC | No internal connection - electrically isolated; may be left floating or grounded per layout needs |
| 6 | OUT | Redundant output pin - not used in OPA330AIDR; reserved for dual-channel variants |
| 7 | V+ | Positive supply - supplies internal charge pumps and rail-to-rail output stage |
| 8 | NC | No internal connection - electrically isolated; no routing or thermal requirements |
Key Features
| Feature | Design Value |
|---|---|
| Zero-Drift Auto-Calibration | Continuous correction eliminates manual calibration and reduces long-term drift to <1 µV over 300 hours |
| Rail-to-Rail Input/Output | Supports full-scale signal acquisition from 0 V to V+ without level-shifting circuitry |
| Internal EMI Filtering | 10-kΩ on-chip input resistors attenuate RF interference above 10 MHz without external components |
| Low 0.1–10 Hz Noise | 1.1 µVPP enables sub-µV resolution in slow-sampling applications like thermocouple amplification |
| Wide Temperature Range | Specified from –40°C to +125°C - suitable for automotive cabin and industrial motor-control environments |
Applications
| Battery-Powered Instrumentation | Temperature Measurement |
|---|---|
Use Scenario: Handheld multimeter front-end amplifying microvolt-level thermocouple outputs under varying ambient temperatures. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with ultra-low drift to preserve absolute accuracy across 0–50°C operating range. Use Value: Eliminates need for periodic recalibration; maintains ≤0.5°C error over 2-year field deployment without user intervention. |
Use Scenario: RTD bridge amplifier in portable environmental monitor powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Low-noise, low-IQ instrumentation amplifier front-end rejecting common-mode noise from shared ground paths. Use Value: Enables 0.1°C resolution at 10 µA average system current - extending battery life to 18 months. |
| Transducer Signal Conditioning | Electronic Scale Load Cell Interface |
Use Scenario: Strain-gauge bridge output amplification in industrial pressure sensor with 4–20 mA loop power. IC Role / Device Role / Timing Role: High-CMRR, rail-to-rail input op amp driving SAR ADC input with minimal offset-induced zero-error. Use Value: Reduces factory calibration steps by 70%; achieves <0.05% FS linearity error without software correction. |
Use Scenario: Millivolt-level load cell output amplification in retail POS scale operating from 3.3 V USB supply. IC Role / Device Role / Timing Role: Zero-drift gain block compensating for thermal EMF errors induced by copper-constantan junctions. Use Value: Suppresses thermoelectric drift to <0.2 µV/°C - meeting OIML R76 Class III weight accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDR | Lower max offset (10 µV) and drift (0.1 µV/°C); higher IQ (17 µA typ); same SOIC-8 footprint | Better DC accuracy but less suited for ultra-low-power wake-up circuits requiring <10 µA sleep current | Select OPA333AIDR when absolute initial accuracy outweighs quiescent current budget |
| MCP6V81-E/SN | Higher GBW (1.8 MHz); higher IQ (60 µA max); different pinout (V– on pin 4, V+ on pin 8, no NC pins) | Enables faster settling in dynamic sensor sampling but requires PCB redesign due to non-compatible pin mapping | Select MCP6V81-E/SN only if bandwidth >1 MHz is required and layout revision is acceptable |
Compared with OPA330AIDR, OPA333AIDR improves DC precision at the cost of higher active current, while MCP6V81-E/SN trades pin compatibility for bandwidth - making OPA330AIDR the optimal balance of accuracy, power, and drop-in manufacturability in space-constrained SOIC layouts.
Availability
OPA330AIDR is available at Aetrix Electronics and suitable for battery-powered instrumentation, temperature measurement systems, transducer signal conditioning, and electronic scale load cell interfaces requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA330AIDR 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
Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions, with leadership in precision analog ICs since 1930.
The OPA330AIDR belongs to TI's Zero-Drift Operational Amplifier product line, designed specifically for high-accuracy, low-power signal conditioning in unregulated battery-powered systems where long-term stability and minimal calibration overhead are critical.
FAQ
What is the maximum supply voltage for OPA330AIDR?
The absolute maximum supply voltage for OPA330AIDR is 7 V, but the recommended operating range is 1.8 V to 5.5 V. Exceeding 5.5 V risks permanent damage and violates the device's qualified operating conditions. At 5.5 V, OPA330AIDR maintains full specification compliance for offset, drift, and noise performance across –40°C to +125°C.
Does OPA330AIDR support true rail-to-rail input?
Yes, OPA330AIDR supports rail-to-rail input with a common-mode voltage range extending 0.1 V beyond both V– and V+. This means it accepts input signals from (V– – 0.1 V) to (V+ + 0.1 V) without phase reversal or increased distortion - a key advantage over conventional rail-to-rail op amps with dead zones near the rails.
Can OPA330AIDR drive capacitive loads directly?
OPA330AIDR is unity-gain stable and can drive up to 100 pF capacitive loads without oscillation, as confirmed in the Typical Characteristics section of its datasheet. For loads >100 pF, external isolation resistance (e.g., 10–50 Ω in series with the output) is recommended to maintain phase margin and prevent peaking in step response.
Is OPA330AIDR pin-compatible with other members of the OPA330 family?
No - OPA330AIDR (SOIC-8) is not pin-compatible with the 5-pin SOT-23, SC70, or DSBGA variants of OPA330. Those packages have different pin counts and assignments (e.g., V– and V+ on pins 2/5 in SOT-23 vs. pins 4/7 in SOIC-8). Only the SOIC-8 variant shares identical pinout with OPA330AIDR.
What is the thermal resistance (RθJA) of OPA330AIDR in SOIC-8 package?
The junction-to-ambient thermal resistance (RθJA) for OPA330AIDR in the SOIC-8 (D) package is 140.1°C/W under standard JEDEC JESD51-2 PCB conditions. This value assumes a 2-layer board with 1 in² copper area per side; actual thermal performance improves with enhanced copper pours or thermal vias beneath the exposed die pad.
OPA330AIDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.16V/µs
- Gain Bandwidth Product:
- 350 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 200 pA
- Voltage - Input Offset:
- 8 µV
- Current - Supply:
- 21µA
- Current - Output / Channel:
- 5 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA330AIDR FAQ
1.How can I place an order for OPA330AIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA330AIDR 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 OPA330AIDR reliable?
The price and inventory of OPA330AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA330AIDR is usually 5 days.
3.What payment methods are accepted for OPA330AIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA330AIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA330AIDR?
OPA330AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA330AIDR 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 OPA330AIDR?
For technical support, including OPA330AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA330AIDR requirements.
6.How does Aetrix verify that OPA330AIDR is sourced from the original manufacturer or authorized distributors?
All OPA330AIDR 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 OPA330AIDR meets industry standards.
7.What is the process for return or replacement of OPA330AIDR?
All OPA330AIDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA330AIDR, 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 OPA330AIDR part is unused and in its original packaging.
Return procedure for OPA330AIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA330AIDR Tags
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