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Texas Instruments OPA364ID
- Part No.:
- OPA364ID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA364ID.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:665
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Product details
Overview
OPA364ID from Texas Instruments is a single, rail-to-rail input/output CMOS operational amplifier optimized for low-voltage, single-supply operation (1.8 V to 5.5 V). It delivers 7 MHz gain-bandwidth, 5 V/µs slew rate, 90 dB typical CMRR, and 500 µV maximum input offset voltage - enabling high-fidelity signal conditioning in battery-powered microphone preamplifiers and sensor interfaces.
For engineers reviewing the OPA364ID datasheet, OPA364ID pinout, OPA364ID application, or OPA364ID equivalent, key selection criteria include its 1.8-V minimum supply, 10-mV rail-to-rail output swing at 25°C, ultra-low 750 µA/channel quiescent current, and guaranteed operation from –40°C to +125°C in industrial environments.
Technical Context
The OPA364ID uses a complementary CMOS input stage that eliminates crossover distortion, ensuring monotonic common-mode response and excellent differential linearity when driving SAR or delta-sigma ADCs. Its unity-gain stable architecture supports direct connection to precision data acquisition front-ends without external compensation.
No shutdown function is integrated - unlike the pin-compatible OPA363 family - making OPA364ID a dedicated, always-on amplifier with simplified biasing and reduced enable-control overhead in continuous-sensing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 5.5 V - enables direct use with Li-ion, coin-cell, and 3.3-V/5-V logic rails without level-shifting. |
| Gain-Bandwidth Product | 7 MHz - supports stable closed-loop gain ≥10 up to ~700 kHz, suitable for anti-aliasing and active filter stages. |
| Slew Rate | 5 V/µs - ensures <1.5 µs settling to 0.01% for 4-V steps, critical for fast transient capture in data acquisition. |
| Input Offset Voltage | ≤500 µV (max) - minimizes DC error in high-gain sensor amplification (e.g., electret mic bias networks). |
| CMRR | 90 dB (typ), 74 dB (min) - rejects power-supply noise and ground bounce in mixed-signal PCB layouts. |
| Quiescent Current | 750 µA/channel (max) - allows >1-year battery life in always-on wearable health monitors. |
| Rail-to-Rail Output | Swings within 10 mV of rails (RL = 10 kΩ) - maximizes dynamic range into 16-bit ADCs with 0–VCC input ranges. |
Pinout & Package
OPA364ID is supplied in an 8-pin SOIC (D package) with 4.90 mm × 3.91 mm body size. All pins are electrically defined; no internal connections exist on pins 1, 5, and 8.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No connect (NC) | Internally unconnected; must be left floating or tied to ground per layout best practice. |
| 2 | Inverting input (–IN) | High-impedance node for feedback network attachment; accepts signals down to V– – 0.1 V. |
| 3 | Noninverting input (+IN) | DC-coupled input node; common-mode range extends 0.1 V beyond both supply rails. |
| 4 | Negative supply (V–) | Reference for all internal biasing; typically connected to GND in single-supply configurations. |
| 5 | No connect (NC) | Unused silicon pad; no electrical function - avoid routing traces or vias beneath this pin. |
| 6 | Output (VOUT) | Capable of sourcing/sinking ±20 mA; drives 10-kΩ loads to within 10 mV of V+ or V–. |
| 7 | Positive supply (V+) | Primary power input; supplies all internal circuitry including input stage and output buffer. |
| 8 | No connect (NC) | Thermally isolated pad; not bonded - leave unconnected to minimize thermal coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Input common-mode range spans (V–) – 0.1 V to (V+) + 0.1 V; output swings to within 10 mV of either rail - preserves full ADC code utilization. |
| No phase reversal | Complementary input stage prevents output inversion during input overdrive - avoids latch-up in closed-loop sensor systems. |
| Low input bias current | ±1 pA (typ) at 25°C - eliminates significant voltage drop across high-value bias resistors (e.g., 100 kΩ electret mic networks). |
| Unity-gain stable | Operates without external compensation at gain = 1 - simplifies design of buffer, summing, and instrumentation amplifier stages. |
| Industrial temperature range | Specified from –40°C to +125°C - qualified for under-hood automotive sensors and industrial process controllers. |
Applications
| Electret Microphone Preamplifier | Portable Data Logger Front-End |
|---|---|
Use Scenario: Amplifying weak AC-coupled signals from electret condenser microphones powered via resistor bias (e.g., 2.2 kΩ to 5 V). IC Role / Device Role / Timing Role: Single-supply, noninverting amplifier with gain = 100, DC-blocking capacitor at input, and rail-to-rail output driving 16-bit SAR ADC reference range. Use Value: 500 µV max offset ensures <0.5% gain error; 7-MHz bandwidth captures full audio spectrum (20 Hz–20 kHz) with <0.002% THD+N. | Use Scenario: Conditioning thermistor, RTD, or bridge sensor outputs in battery-powered environmental monitoring nodes. IC Role / Device Role / Timing Role: Precision instrumentation amplifier input stage (with external matched resistors), providing low-noise, high-CMRR buffering before multiplexed ADC sampling. Use Value: 90-dB CMRR rejects shared ground noise between multiple sensors; 750 µA quiescent current extends 5-year battery life in low-duty-cycle wake-up systems. |
| Medical Pulse Oximeter Analog Front-End | Industrial 4–20 mA Loop Receiver |
Use Scenario: Amplifying photodiode current from red/IR LEDs in wearable pulse oximetry modules operating from 3.3-V coin cells. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with 1-MΩ feedback resistor and 10-pF compensation, configured for 100-ns pulse response. Use Value: 5 V/µs slew rate supports clean 100-ns LED pulse edges; 17 nV/√Hz input voltage noise maintains SNR >80 dB for SpO₂ calculation accuracy. | Use Scenario: Converting 4–20 mA loop current to 0–5 V for PLC analog inputs in factory automation systems. IC Role / Device Role / Timing Role: Precision current-to-voltage converter using 250-Ω shunt, followed by rail-to-rail output buffer driving long cables. Use Value: 10-mV rail-to-rail swing ensures full 0–5 V range utilization; 80–330 µV/V PSRR suppresses supply ripple from noisy 24-V loop power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA363ID | Includes shutdown pin (pin 8); same SOIC-8 package; identical AC specs but 1 µA shutdown current vs 750 µA active. | Required where system-level power gating is needed (e.g., intermittent sensor polling). | Select OPA363ID only if hardware-controlled enable/disable is mandatory; otherwise OPA364ID offers simpler layout and lower standby leakage risk. |
| MCP6001T-I/OT | Lower bandwidth (1 MHz), higher offset (1.5 mV max), but same SOT-23-5 footprint and 1.8-V operation. | Suitable for cost-sensitive, low-speed applications like basic voltage followers or comparator hysteresis generators. | Choose MCP6001T-I/OT only when bandwidth and offset requirements are relaxed; OPA364ID provides 7× more GBW and 3× lower offset for precision signal chains. |
Compared with OPA363ID, OPA364ID removes shutdown complexity for always-on designs, while outperforming MCP6001T-I/OT in bandwidth, offset, and CMRR - making it optimal for high-fidelity, low-power analog front-ends where continuous operation and measurement integrity are critical.
Availability
OPA364ID is available at Aetrix Electronics and suitable for electret microphone preamplifiers, portable data loggers, and medical pulse oximeter analog front-ends requiring stable component supply across extended production lifecycles.
Supply support for OPA364ID 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 op amps and signal chain solutions.
The OPA364ID belongs to TI's OPAx364 rail-to-rail CMOS op amp family, designed specifically for low-voltage, high-accuracy signal conditioning in battery-powered and industrial sensing applications.
FAQ
What is the maximum supply voltage for OPA364ID?
The OPA364ID supports a maximum supply voltage of 5.5 V across the V+ to V– terminals, with absolute maximum ratings specifying 0 V to 5.5 V for the supply differential. Operation above 5.5 V risks permanent damage, and the device is fully characterized from 1.8 V to 5.5 V - making it ideal for 3.3-V and 5-V systems, including those powered by regulated Li-ion sources. The OPA364ID datasheet confirms this limit in Section 7.1 Absolute Maximum Ratings.
Does OPA364ID have a shutdown pin?
No, the OPA364ID does not include a shutdown pin. Unlike the OPA363ID (which adds an enable pin on SOIC-8 pin 8), the OPA364ID is a dedicated, always-on amplifier with no power-management control. Its SOIC-8 pinout reserves pins 1, 5, and 8 as no-connect (NC) terminals. This simplifies PCB layout and eliminates enable timing constraints, but requires external power switching if system-level sleep modes are needed. Confirmed in the Pin Functions table for OPA364 on page 6 of the SBOS259F datasheet.
What is the input common-mode voltage range of OPA364ID?
The OPA364ID features a true rail-to-rail input stage with a common-mode voltage range extending from (V–) – 0.1 V to (V+) + 0.1 V. This allows the device to accept input signals slightly beyond both supply rails - critical for interfacing with sensors whose outputs may transiently exceed V– or V+ due to ESD or load dump. At 25°C and VS = 5 V, this translates to –0.1 V to +5.1 V. The specification is validated across –40°C to +125°C per Section 7.9 Electrical Characteristics in the official datasheet.
Can OPA364ID drive capacitive loads?
Yes, the OPA364ID can drive moderate capacitive loads, but stability depends on load value and closed-loop gain. The datasheet specifies performance with CL = 100 pF in slew rate, settling time, and overshoot tests (Section 7.9), and Figure 13 shows <10% overshoot up to 1000 pF at G = +1. For loads >100 pF, adding a small series resistor (e.g., 10–50 Ω) between the output and capacitance restores phase margin. Direct driving of >1-nF loads (e.g., long cables or ADC input caps) requires external isolation or gain adjustment - verified in Typical Characteristics Figures 13 and 19.
Is OPA364ID unity-gain stable?
Yes, the OPA364ID is explicitly specified as unity-gain stable in the datasheet's Features section and Detailed Description (Section 8.1). It exhibits no peaking or oscillation when configured as a voltage follower (gain = +1) with CL ≤ 100 pF, and maintains ≥45° phase margin across its full operating range. This eliminates the need for external compensation components in buffer, active filter, or transimpedance configurations - a key advantage over decompensated op amps. Stability is confirmed in Figure 19 (Small-Signal Step Response) and Section 7.9 test conditions.
OPA364ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- 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:
- Rail-to-Rail
- Slew Rate:
- 5V/µs
- Gain Bandwidth Product:
- 7 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 1.1mA
- Current - Output / Channel:
- 85 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
OPA364ID FAQ
1.How can I place an order for OPA364ID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA364ID 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 OPA364ID reliable?
The price and inventory of OPA364ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA364ID is usually 5 days.
3.What payment methods are accepted for OPA364ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA364ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA364ID?
OPA364ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA364ID 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 OPA364ID?
For technical support, including OPA364ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA364ID requirements.
6.How does Aetrix verify that OPA364ID is sourced from the original manufacturer or authorized distributors?
All OPA364ID 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 OPA364ID meets industry standards.
7.What is the process for return or replacement of OPA364ID?
All OPA364ID units undergo pre-shipment inspection (PSI). If there is an issue with OPA364ID, 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 OPA364ID part is unused and in its original packaging.
Return procedure for OPA364ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA364ID Tags
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