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Texas Instruments OPA4377AIPWR
- Part No.:
- OPA4377AIPWR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4377AIPWR.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,012
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Product details
Overview
OPA4377AIPWR from Texas Instruments is a quad-channel, rail-to-rail output CMOS operational amplifier optimized for low-voltage single-supply operation (2.2V to 5.5V), featuring 5.5MHz gain-bandwidth product, 7.5nV/√Hz input voltage noise at 1kHz, 0.2pA typical input bias current, and 1mV maximum offset voltage. It serves as a precision signal conditioner in photodiode preamplifiers, sensor interfaces, and audio front-ends.
For engineers reviewing the OPA4377AIPWR datasheet, OPA4377AIPWR pinout, OPA4377AIPWR application, or OPA4377AIPWR equivalent, key selection criteria include its ultra-low input bias current for high-impedance sources, EMI-hardened input filtering, unity-gain stability with capacitive load drive up to 250pF, and guaranteed operation from –40°C to +125°C in TSSOP-14 packaging.
Technical Context
The OPA4377AIPWR implements a CMOS input stage with internal electrostatic discharge (ESD) protection diodes on all pins and integrated low-pass filtering (–3dB at ~75MHz) to suppress electromagnetic interference. Its rail-to-rail output swing delivers ≥10mV from each supply rail under 10kΩ load.
Designed for unity-gain stability, it avoids phase inversion during input overdrive and supports single-supply configurations with common-mode input range extending 100mV beyond both rails. Quiescent current is 0.76mA per amplifier (typical), enabling battery-powered operation without regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5.5MHz - enables stable closed-loop operation up to 100kHz with gain ≥55, suitable for anti-aliasing filters ahead of 16-bit ADCs. |
| Input Bias Current | ±0.2pA (typ) - preserves signal integrity in high-impedance photodiode or piezoelectric sensor preamplifier circuits. |
| Input Voltage Noise | 7.5nV/√Hz at 1kHz - ensures minimal added noise in low-level analog signal conditioning paths. |
| Offset Voltage | 1mV (max) - supports DC-coupled applications requiring <0.1% gain error at unity gain with 1V input. |
| Supply Voltage Range | 2.2V to 5.5V - allows direct connection to Li-ion, 3.3V, or 5V rails without LDO regulation. |
| Operating Temperature | –40°C to +125°C - qualified for industrial and automotive under-hood sensor signal chains. |
| Quiescent Current | 0.76mA per channel (typ) - enables four-channel amplification in space-constrained, low-power embedded systems. |
Pinout & Package
TSSOP-14 package (4.4mm × 5.0mm × 1.2mm body height), thermally enhanced with exposed die pad connected to V– for improved power dissipation and stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Delivers rail-to-rail buffered signal; capable of sourcing/sinking ±30/–50mA short-circuit current. |
| 2 (–IN A) | Inverting input A | High-impedance CMOS node; accepts signals within (V–) – 0.1V to (V+) + 0.1V common-mode range. |
| 3 (+IN A) | Non-inverting input A | Paired with Pin 2 for differential sensing; internally protected by ESD clamps to rails. |
| 4 (V–) | Negative supply / ground reference | Common return for all four amplifiers; thermal pad must be soldered to PCB ground plane. |
| 5 (+IN B) | Non-inverting input B | Independent channel B input; identical electrical characteristics to Pin 3. |
| 6 (–IN B) | Inverting input B | Independent channel B inverting input; shares no internal coupling with other channels. |
| 7 (OUT B) | Amplifier B output | Electrically isolated output; supports individual feedback networks without crosstalk. |
| 8 (NC) | No internal connection | Not bonded; must remain unconnected to avoid parasitic coupling or mechanical stress. |
| 9 (OUT C) | Amplifier C output | Third independent output; maintains >110dB channel separation at 1kHz per datasheet Figure 19. |
| 10 (–IN C) | Inverting input C | High-precision input stage with 0.32mV/°C max drift over temperature. |
| 11 (+IN C) | Non-inverting input C | Matches Pin 5/3 performance; supports multi-channel synchronous sampling architectures. |
| 12 (V+) | Positive supply | Accepts 2.2V–5.5V; requires 0.1µF ceramic bypass capacitor placed ≤2mm from pin. |
| 13 (+IN D) | Non-inverting input D | Fourth channel input; validated for simultaneous use with all other channels at full spec. |
| 14 (–IN D) | Inverting input D | Final input terminal; completes quad configuration with matched dc and ac performance. |
Key Features
| Feature | Design Value |
|---|---|
| EMI input filtering | Integrated 75MHz low-pass filter reduces rectified offset shift from RF interference in noisy industrial environments. |
| Rail-to-rail output | Swings within 10mV of both rails at 10kΩ load, maximizing dynamic range in 3.3V data acquisition systems. |
| Unity-gain stability | Operates stably with no external compensation in buffer, inverter, or follower configurations driving ≤250pF. |
| Low quiescent current | 0.76mA per amplifier enables four-channel operation at <3.1mA total, critical for portable instrumentation. |
| Wide temperature range | Specified from –40°C to +125°C with no derating, supporting engine control unit (ECU) and motor drive feedback loops. |
Applications
| Photodiode Preamplifier | Piezoelectric Sensor Preamplifier |
|---|---|
Use Scenario: Amplifying weak current signals from reverse-biased photodiodes in optical smoke detectors or spectrophotometers. IC Role / Device Role / Timing Role: Transimpedance amplifier converting picoamp-level photocurrent into measurable voltage with minimal Johnson-Nyquist noise. Use Value: 0.2pA input bias current prevents signal loss across high-value feedback resistors (>1GΩ), preserving sensitivity. | Use Scenario: Conditioning high-impedance charge output from accelerometers or vibration sensors in predictive maintenance modules. IC Role / Device Role / Timing Role: Charge amplifier with ultra-high input impedance to prevent piezoelectric charge leakage during measurement windows. Use Value: CMOS input stage and 13pF common-mode capacitance minimize settling time errors in burst-mode acquisition. |
| Sensor Signal Conditioning | Audio Equipment |
Use Scenario: Front-end amplification for resistive bridge sensors (e.g., strain gauges, RTDs) in industrial process controllers. IC Role / Device Role / Timing Role: Precision instrumentation amplifier driver with low offset drift (0.32mV/°C) for ratiometric measurements. Use Value: 1mV max offset voltage and 90dB CMRR ensure <0.01% linearity error over full industrial temperature range. | Use Scenario: Line-level buffering and active filtering in portable headphone amplifiers and USB DACs. IC Role / Device Role / Timing Role: Low-noise, low-distortion (0.00027% THD+N) gain stage preserving audio fidelity in battery-powered devices. Use Value: 7.5nV/√Hz noise density and rail-to-rail output enable >105dB SNR in 3.3V audio signal chains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4376AIPWR | Lower input bias current (0.2fA vs 0.2pA), higher GBW (5.5MHz same), but higher quiescent current (0.92mA/ch). | Better for femtoamp-level current measurement; less suitable for ultra-low-power battery operation. | Select OPA4376AIPWR only when sub-picoamp bias is mandatory and power budget allows +21% per channel. |
| LMV434IDR | Higher input bias current (10pA), lower GBW (1MHz), wider supply range (2.7V–5.5V), no EMI filtering. | Cost-optimized for non-critical industrial sensors where RF immunity is not required. | Choose LMV434IDR for cost-sensitive designs where 10× higher input bias and missing EMI hardening are acceptable. |
Compared with OPA4377AIPWR, OPA4376AIPWR trades 1000× lower input bias for higher power consumption, while LMV434IDR sacrifices noise, speed, and EMI resilience for lower unit cost-making OPA4377AIPWR the balanced choice for precision, low-power, noise-sensitive applications.
Availability
OPA4377AIPWR is available at Aetrix Electronics and suitable for photodiode preamplifiers, piezoelectric sensor interfaces, and audio signal conditioning requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for OPA4377AIPWR 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 OPA377 family-including OPA4377AIPWR-is designed for low-voltage, low-noise, high-accuracy signal conditioning in battery-powered and industrial sensor systems where input bias current, noise, and EMI robustness are critical.
FAQ
What is the maximum capacitive load the OPA4377AIPWR can drive in unity-gain configuration?
The OPA4377AIPWR can directly drive up to 250pF of pure capacitive load in unity-gain buffer configuration while maintaining stability, as verified in TI's SBOS504B datasheet Figure 15. For loads exceeding this value, a 10Ω–20Ω series resistor at the output (Figure 24) restores phase margin without degrading DC accuracy in low-current applications.
Does the OPA4377AIPWR require external compensation for stability?
No, the OPA4377AIPWR is unity-gain stable and does not require external compensation components. Its internal compensation ensures phase margin >60° across the full operating range (2.2V–5.5V, –40°C to +125°C), even when driving 250pF capacitive loads, as confirmed in the "Unity-Gain Stable" feature and Figure 15 of the SBOS504B datasheet.
How is the thermal pad on the OPA4377AIPWR package intended to be used?
The exposed thermal pad on the OPA4377AIPWR's TSSOP-14 package must be soldered to a PCB copper pour connected to the V– (ground) net. Per TI's layout guidelines, this improves thermal resistance (θJA = 150°C/W) and stabilizes bias point drift; leaving it floating or connecting to another net risks parametric shift and reduced reliability.
Can the OPA4377AIPWR operate from a single 2.2V supply?
Yes, the OPA4377AIPWR is fully specified for operation from a single 2.2V supply (or dual ±1.1V). All key parameters-including input common-mode range (extends 100mV beyond rails), output swing (within 10mV of rails), and quiescent current (0.76mA/ch)-are guaranteed at this minimum voltage, enabling direct use with coin-cell or energy-harvesting sources.
What is the purpose of the internal EMI filtering in the OPA4377AIPWR?
The internal EMI filtering in the OPA4377AIPWR consists of on-chip low-pass circuitry with ~75MHz –3dB cutoff, designed to suppress rectification-induced offset shifts caused by RF interference on input pins. This eliminates the need for external R-C filters in industrial environments with switching power supplies or wireless transceivers near analog signal paths.
OPA4377AIPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 5.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 760µA (x4 Channels)
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.2 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
OPA4377AIPWR FAQ
1.How can I place an order for OPA4377AIPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4377AIPWR 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 OPA4377AIPWR reliable?
The price and inventory of OPA4377AIPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4377AIPWR is usually 5 days.
3.What payment methods are accepted for OPA4377AIPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4377AIPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4377AIPWR?
OPA4377AIPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4377AIPWR 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 OPA4377AIPWR?
For technical support, including OPA4377AIPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4377AIPWR requirements.
6.How does Aetrix verify that OPA4377AIPWR is sourced from the original manufacturer or authorized distributors?
All OPA4377AIPWR 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 OPA4377AIPWR meets industry standards.
7.What is the process for return or replacement of OPA4377AIPWR?
All OPA4377AIPWR units undergo pre-shipment inspection (PSI). If there is an issue with OPA4377AIPWR, 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 OPA4377AIPWR part is unused and in its original packaging.
Return procedure for OPA4377AIPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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