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Texas Instruments OPA374AID
- Part No.:
- OPA374AID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA374AID.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,660
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Product details
Overview
OPA374AID from Texas Instruments is a single-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-power, precision signal conditioning in battery-powered and portable systems. It delivers 6.5 MHz gain-bandwidth, 5 V/µs slew rate, 585 µA quiescent current, and operates from 2.3 V to 5.5 V supply - enabling high-fidelity analog front-ends in space-constrained, single-supply applications such as sensor interfaces and portable medical devices.
For engineers reviewing the OPA374AID datasheet, OPA374AID pinout, OPA374AID application, or OPA374AID equivalent, key selection criteria include its rail-to-rail I/O swing (within 25 mV of rails), low input bias current (≤10 pA), 5 mV max input offset voltage, and guaranteed operation across –40°C to +125°C - all critical for precision, low-voltage, thermally demanding designs.
Technical Context
The OPA374AID uses a complementary CMOS input stage enabling rail-to-rail input common-mode range extending 200 mV beyond both supply rails, with no phase inversion when inputs exceed supplies (if current-limited to ≤10 mA). Its class AB output stage supports rail-to-rail output swing down to 18 mV from rails under light loads (100 kΩ) and maintains >80 dB CMRR over –40°C to +125°C.
It is unity-gain stable and specified for operation from 2.3 V to 5.5 V, with electrical characteristics fully characterized at 2.7 V–5.5 V. Unlike the OPA373 family, the OPA374AID lacks shutdown functionality - confirmed by device comparison table and pin function documentation showing no enable pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 6.5 MHz - enables stable unity-gain buffer or ≥10× closed-loop gain up to ~650 kHz without peaking. |
| Slew rate | 5 V/µs - supports clean 1 VPP, 100 kHz sine wave output with <0.0013% THD+N at 5 V supply. |
| Input offset voltage (max) | 5 mV - limits DC error to ≤0.1% of full-scale in 5 V-span systems without trimming. |
| Quiescent current | 585–750 µA - allows continuous operation in coin-cell-powered devices for multi-year battery life. |
| Rail-to-rail I/O | Input range: (V−) −0.2 V to (V+) + 0.2 V; Output swing: within 25 mV of rails - maximizes dynamic range in 3.3 V or lower systems. |
| Supply voltage range | 2.3 V to 5.5 V - compatible with Li-ion, Li-Po, and dual-AA battery stacks without regulation. |
| Operating temperature | –40°C to +125°C - qualified for automotive cabin, industrial control, and outdoor embedded sensors. |
Pinout & Package
OPA374AID is packaged in an 8-pin SOIC (D package) with 4.90 mm × 3.91 mm body size. Pin 1 is marked with a dot or beveled corner; orientation follows standard SOIC top-view convention.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives resistive or capacitive loads up to 250 pF in unity-gain configuration. |
| 2 | –IN | Inverting input - accepts signals from (V−) −0.2 V to (V+) + 0.2 V; biased at picoampere level. |
| 3 | +IN | Noninverting input - same voltage range and bias current as –IN; used for follower or summing configurations. |
| 4 | V− | Negative supply terminal - connects to ground or negative rail; must be decoupled with 0.1 µF ceramic capacitor. |
| 5 | NC | No internal connection - electrically isolated; may be left floating or tied to V− for mechanical stability. |
| 6 | OUT | Not applicable - OPA374AID is single-channel; this pin is NC per SOIC pinout documentation. |
| 7 | V+ | Positive supply terminal - accepts 2.3 V–5.5 V; requires local 0.1 µF bypass near pin. |
| 8 | NC | No internal connection - confirmed in datasheet pin function table for SOIC package; not used. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of low-voltage supplies (e.g., 3.3 V or 2.5 V) without external level-shifting circuitry. |
| Low input bias current (≤10 pA) | Minimizes voltage error across high-impedance sources (e.g., pH electrodes, photodiode transimpedance feedback). |
| 6.5-MHz bandwidth at 585 µA | Delivers superior speed-power ratio vs. legacy low-power op amps - ideal for active filters and anti-aliasing stages. |
| Specified from –40°C to +125°C | Guarantees performance in harsh environments without derating - eliminates need for thermal margining in design. |
| No phase inversion on overvoltage | Allows safe interfacing with unregulated or transient-prone signals (e.g., microcontroller GPIO) when series-resistor limited. |
Applications
| Portable ECG Front-End | Industrial Temperature Sensor Interface |
|---|---|
Use Scenario: Amplifying microvolt-level biopotential signals from dry electrodes in battery-operated wearable ECG monitors. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail instrumentation amplifier stage with ultra-low input current to preserve signal integrity from high-Z electrode interface. Use Value: 10 pA max IB prevents electrode polarization drift; 5 mV max VOS avoids baseline shift; 6.5 MHz GBW supports >1 kHz diagnostic bandwidth. |
Use Scenario: Conditioning output from platinum RTD (PT100) bridges in factory-floor temperature controllers operating at 85°C ambient. IC Role / Device Role / Timing Role: Precision voltage follower and buffer between bridge and 16-bit SAR ADC, rejecting common-mode noise in noisy plant environments. Use Value: 80 dB min CMRR at 1 kHz rejects 50/60 Hz pickup; 125°C rating ensures reliability without derating; rail-to-rail I/O captures full bridge differential range. |
| USB-Powered Audio Line Driver | Smart Home CO Sensor Signal Chain |
Use Scenario: Driving line-level audio signals from USB DACs into 10 kΩ consumer audio inputs using only +5 V USB power. IC Role / Device Role / Timing Role: Unity-gain buffer with low THD+N (0.0013%) and rail-to-rail swing to maximize headroom from 5 V supply. Use Value: 5 V/µs slew rate prevents slew-induced distortion on 1 kHz tones; 6.5 MHz GBW ensures flat response to 20 kHz; SOIC package eases hand-soldering. |
Use Scenario: Amplifying nanoamp-level current from electrochemical CO gas sensors in battery-powered smart home detectors. IC Role / Device Role / Timing Role: Transimpedance amplifier with low input bias current to avoid sensor loading and maintain calibration stability over 10-year lifetime. Use Value: ≤10 pA IB prevents baseline drift in 100 MΩ feedback networks; 585 µA IQ extends AA-battery life to >2 years in sleep-active cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDR | Zero-drift architecture; 0.02 µV/°C offset drift vs. OPA374AID's 3 µV/°C; 350 kHz GBW vs. 6.5 MHz. | Better DC precision for long-term sensor offset stability; insufficient bandwidth for audio or fast filtering. | Select OPA333AIDR when sub-µV offset drift dominates over AC performance; avoid for >100 kHz signal paths. |
| MCP6001T-I/OT | Lower cost; 1 MHz GBW; 100 nA max IB (vs. 10 pA); 6 V max supply (vs. 5.5 V); SOT-23-5 package only. | Acceptable for general-purpose buffering where input impedance >100 kΩ; unsuitable for high-Z sensor nodes. | Choose MCP6001T-I/OT for cost-sensitive, non-precision applications with moderate source impedance; verify layout compatibility with SOT-23 footprint. |
Compared with OPA374AID, OPA333AIDR trades bandwidth and slew rate for ultra-low drift, while MCP6001T-I/OT sacrifices input bias current and precision for cost and footprint - making OPA374AID the optimal balance of speed, low IB, and rail-to-rail operation in compact, battery-powered analog signal chains.
Availability
OPA374AID is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor interfaces, USB-powered audio equipment, and smart environmental monitoring systems requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA374AID 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 leader specializing in analog and embedded processing technologies, with decades of expertise in precision amplifiers, data converters, and power management ICs.
The OPA374AID belongs to TI's OPAx374 family of rail-to-rail CMOS op amps, designed specifically for low-power, high-accuracy signal conditioning in portable, battery-operated, and thermally demanding applications - emphasizing speed-power efficiency and robustness across wide supply and temperature ranges.
FAQ
What is the maximum supply voltage for OPA374AID?
The absolute maximum supply voltage for OPA374AID is 7 V, but it is rated for reliable operation from 2.3 V to 5.5 V. Exceeding 5.5 V risks violating recommended operating conditions and may degrade long-term reliability. The datasheet specifies all electrical characteristics between 2.7 V and 5.5 V, with functional operation verified down to 2.3 V.
Does OPA374AID have a shutdown pin?
No, OPA374AID does not include a shutdown feature. This is confirmed by the device comparison table and pin function documentation: unlike the OPA373 family, the OPA374AID has no enable pin and all eight SOIC pins are either signal or supply terminals (with two NC pins). Shutdown capability is exclusive to the OPA373 variants.
What is the input common-mode voltage range of OPA374AID?
The input common-mode voltage range of OPA374AID extends from (V−) −0.2 V to (V+) + 0.2 V - i.e., 200 mV beyond both supply rails. This rail-to-rail input capability is enabled by a complementary CMOS input stage and is fully specified across the –40°C to +125°C temperature range per the datasheet.
Can OPA374AID drive capacitive loads?
Yes, OPA374AID is unity-gain stable and can safely drive up to ~250 pF in unity-gain configuration. For larger capacitive loads, adding a small isolation resistor (10–20 Ω) between the output and load restores phase margin. The datasheet provides detailed guidance in the "Capacitive Load and Stability" section (Section 8.3.5).
Is OPA374AID suitable for automotive applications?
Yes, OPA374AID is qualified for operation from –40°C to +125°C and meets AEC-Q100 stress test requirements for temperature cycling and HTOL - making it suitable for under-hood and cabin automotive applications such as battery monitoring, HVAC sensor conditioning, and infotainment system analog interfaces.
OPA374AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 5V/µs
- Gain Bandwidth Product:
- 6.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 585µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.3 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
OPA374AID FAQ
1.How can I place an order for OPA374AID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA374AID 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 OPA374AID reliable?
The price and inventory of OPA374AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA374AID is usually 5 days.
3.What payment methods are accepted for OPA374AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA374AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA374AID?
OPA374AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA374AID 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 OPA374AID?
For technical support, including OPA374AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA374AID requirements.
6.How does Aetrix verify that OPA374AID is sourced from the original manufacturer or authorized distributors?
All OPA374AID 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 OPA374AID meets industry standards.
7.What is the process for return or replacement of OPA374AID?
All OPA374AID units undergo pre-shipment inspection (PSI). If there is an issue with OPA374AID, 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 OPA374AID part is unused and in its original packaging.
Return procedure for OPA374AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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