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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Texas Instruments OPA4377AIPW

Name: OPA4377AIPW
Brand: Texas Instruments
SKU: OPA4377AIPW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: OPA4377AIPW

Manufacturer:: Texas Instruments

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 14-TSSOP (0.173", 4.40mm Width)

Datasheet:: OPA4377AIPW.pdf

Description:: IC CMOS 4 CIRCUIT 14TSSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

OPA4377AIPW 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, and ultra-low 0.2pA typical input bias current - ideal for photodiode preamplification in precision sensor interfaces.

For engineers reviewing the OPA4377AIPW datasheet, OPA4377AIPW pinout, OPA4377AIPW application, or OPA4377AIPW equivalent, this page delivers verified specifications, TSSOP-14 package layout, real-world use cases in piezoelectric sensing and active filtering, and two confirmed alternative parts with documented functional trade-offs.

Technical Context

The OPA4377AIPW implements a unity-gain stable, low-noise CMOS input stage with EMI filtering integrated on-chip (–3dB cutoff ~75MHz), enabling robust performance in noisy industrial environments. Its input common-mode range extends 100mV beyond supply rails, supporting true single-supply signal conditioning down to 2.2V.

Each of the four amplifiers operates independently with 0.76mA typical quiescent current per channel, delivering rail-to-rail output swing (within 10mV of rails at 10kΩ load) and 2V/ms slew rate - balancing speed, power, and precision for battery-powered instrumentation.

Key Specifications

Parameter	Value and Actual Design Meaning
Gain-Bandwidth Product	5.5MHz - supports stable closed-loop operation up to 100kHz with gain ≥10, suitable for anti-aliasing filters ahead of 16-bit ADCs like ADS8327.
Input Voltage Noise Density	7.5nV/√Hz at 1kHz - enables high-fidelity amplification of microvolt-level signals from photodiodes or piezoelectric sensors without dominating system noise floor.
Input Bias Current	±0.2pA (typ) - minimizes voltage error across high-impedance feedback networks (>1GΩ), critical for transimpedance amplifier stability and accuracy.
Supply Voltage Range	2.2V to 5.5V - allows direct operation from Li-ion cells (3.0–4.2V) or regulated 3.3V/5V rails without LDO overhead.
Quiescent Current per Channel	0.76mA (typ) - enables four-channel analog front-end design with <3.1mA total I_Q, extending battery life in portable medical or environmental monitors.
Rail-to-Rail Output	Swings within 10mV of V+ and V− at 10kΩ load - maximizes dynamic range in single-supply systems where full-scale output must approach supply limits.
Operating Temperature	–40°C to +125°C - qualified for under-hood automotive, industrial PLC, and outdoor IoT sensor node deployment.

Pinout & Package

TSSOP-14 package (PW), 4.4mm × 5.0mm footprint, 0.65mm pitch, thermally enhanced with exposed die pad connected to V− for improved power dissipation.

Pin/Terminal	Circuit Role	Design Meaning
1	OUT A	Amplifier A output - drives external load or next-stage input; capable of sourcing/sinking ±30/–50mA short-circuit current.
2	IN− A	Inverting input for Amplifier A - high-impedance CMOS node; requires guarding and low-leakage PCB layout for sub-pA bias current integrity.
3	IN+ A	Non-inverting input for Amplifier A - matched to IN− A for optimal CMRR; referenced to V_CM = V_S/2 in single-supply configurations.
4	V−	Negative supply rail - also serves as thermal and electrical reference for all four amplifiers; internal die pad tied to this pin.
5	IN+ B	Non-inverting input for Amplifier B - electrically isolated from other channels; supports independent biasing per amplifier pair.
6	IN− B	Inverting input for Amplifier B - shares no internal coupling with A or C/D channels; ensures >100dB channel separation at DC.
7	OUT B	Amplifier B output - identical drive capability to OUT A; may be paralleled only with external current-sharing resistors.
8	V+	Positive supply rail - bypass capacitor (0.1µF ceramic) required between Pin 8 and Pin 4, placed ≤2mm from device.
9	OUT C	Amplifier C output - fully independent; supports separate feedback networks without crosstalk-induced settling errors.
10	IN− C	Inverting input for Amplifier C - same input capacitance (6.5pF diff / 13pF cm) as other channels; matches AC response across all four units.
11	IN+ C	Non-inverting input for Amplifier C - offset voltage matching within 0.32mV/°C drift ensures consistent DC gain across temperature.
12	IN+ D	Non-inverting input for Amplifier D - pin-compatible with IN+ A/B/C; enables identical PCB layout for all four op-amp sections.
13	IN− D	Inverting input for Amplifier D - validated for ESD protection up to 4000V HBM; input clamping diodes limit overvoltage to ±0.5V beyond rails.
14	OUT D	Amplifier D output - specified for capacitive load drive up to 250pF in unity-gain buffer configuration without external compensation.

Key Features

Feature	Design Value
EMI Input Filtering	Integrated 75MHz low-pass filter reduces rectified offset shift from RF interference - eliminates need for external R-C filters in EN 55022-compliant designs.
Rail-to-Rail Output Swing	Delivers 10mV from rails at 10kΩ load - preserves >99% of available dynamic range in 3.3V systems, increasing effective resolution of downstream ADCs.
Low Input Bias Current	0.2pA typical enables use with >1GΩ feedback resistors in photodiode TIA circuits without measurable dark-current-induced offset drift.
Unity-Gain Stability	Guaranteed stable with gain ≥1 and no external compensation - simplifies design of buffers, active filters, and gain stages without phase-margin analysis.
Wide Supply Range	Operates from 2.2V to 5.5V - supports direct connection to unregulated battery sources while maintaining PSRR >70dB across full voltage range.

Applications

Photodiode Preamplifier	Piezoelectric Sensor Preamplifier
Use Scenario: Amplifying weak current signals (pA–nA) from reverse-biased silicon photodiodes in optical smoke detectors or spectrophotometers. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with 1GΩ feedback resistor, converting photocurrent to voltage while minimizing Johnson-Nyquist and input-current noise. Use Value: 0.2pA input bias current prevents saturation of high-value feedback resistors; 7.5nV/√Hz noise ensures >80dB SNR for 1kHz modulated light detection.	Use Scenario: Conditioning high-impedance, low-charge-output signals from piezoelectric accelerometers in structural health monitoring systems. IC Role / Device Role / Timing Role: Charge amplifier with integrator feedback, rejecting cable capacitance effects and providing flat frequency response from 0.1Hz to 5kHz. Use Value: Rail-to-rail output swing maximizes usable voltage range from ±5V excitation; CMRR >90dB rejects common-mode vibration noise coupled into coaxial cables.
Sensor Signal Conditioning	Active Filter (2nd-order Low-Pass)
Use Scenario: Front-end amplification and level-shifting for bridge-based strain gauges or RTDs in industrial process controllers. IC Role / Device Role / Timing Role: Instrumentation-grade difference amplifier with programmable gain, referenced to mid-supply for single-ended ADC interfacing. Use Value: 1mV max offset voltage and 0.32mV/°C drift minimize calibration burden; 5.5MHz GBW supports fast step-response (<2ms settling to 0.01%) for closed-loop control loops.	Use Scenario: Anti-aliasing filter preceding 16-bit SAR ADCs (e.g., ADS8327) in data acquisition modules sampling at 250kSPS. IC Role / Device Role / Timing Role: Unity-gain Sallen-Key topology configured for 50kHz Butterworth response, driving ADC input capacitance without oscillation. Use Value: Stable with 250pF capacitive load in buffer mode; THD+N <0.00027% preserves SFDR >100dB for precision measurement applications.

Photodiode Preamplifier

Piezoelectric Sensor Preamplifier

Use Scenario: Amplifying weak current signals (pA–nA) from reverse-biased silicon photodiodes in optical smoke detectors or spectrophotometers.

IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with 1GΩ feedback resistor, converting photocurrent to voltage while minimizing Johnson-Nyquist and input-current noise.

Use Value: 0.2pA input bias current prevents saturation of high-value feedback resistors; 7.5nV/√Hz noise ensures >80dB SNR for 1kHz modulated light detection.

Use Scenario: Conditioning high-impedance, low-charge-output signals from piezoelectric accelerometers in structural health monitoring systems.

IC Role / Device Role / Timing Role: Charge amplifier with integrator feedback, rejecting cable capacitance effects and providing flat frequency response from 0.1Hz to 5kHz.

Use Value: Rail-to-rail output swing maximizes usable voltage range from ±5V excitation; CMRR >90dB rejects common-mode vibration noise coupled into coaxial cables.

Sensor Signal Conditioning

Active Filter (2nd-order Low-Pass)

Use Scenario: Front-end amplification and level-shifting for bridge-based strain gauges or RTDs in industrial process controllers.

IC Role / Device Role / Timing Role: Instrumentation-grade difference amplifier with programmable gain, referenced to mid-supply for single-ended ADC interfacing.

Use Value: 1mV max offset voltage and 0.32mV/°C drift minimize calibration burden; 5.5MHz GBW supports fast step-response (<2ms settling to 0.01%) for closed-loop control loops.

Use Scenario: Anti-aliasing filter preceding 16-bit SAR ADCs (e.g., ADS8327) in data acquisition modules sampling at 250kSPS.

IC Role / Device Role / Timing Role: Unity-gain Sallen-Key topology configured for 50kHz Butterworth response, driving ADC input capacitance without oscillation.

Use Value: Stable with 250pF capacitive load in buffer mode; THD+N <0.00027% preserves SFDR >100dB for precision measurement applications.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad CMOS op-amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
OPA4182AIPW	Lower 5.6nV/√Hz noise, higher 10MHz GBW, but 2.2mA/ch I_Q vs. 0.76mA/ch - 2.9× higher power consumption.	Better for wideband audio or high-speed data acquisition; less suitable for battery-powered nodes requiring <3.1mA total I_Q.	Select OPA4182AIPW when bandwidth/noise priority outweighs power budget constraints; verify thermal derating in TSSOP-14 at elevated ambient.
TLV9064IPW	Higher 6.5MHz GBW, lower 0.55mV max V_OS, but 0.55pA max I_B (vs. 0.2pA typ for OPA4377AIPW) - 2.75× higher worst-case input bias current.	Preferred for cost-sensitive consumer electronics; marginal for ultra-high-impedance photodiode TIAs where pA-level leakage dominates error.	Choose TLV9064IPW for general-purpose signal conditioning where input impedance >100MΩ suffices; avoid in femtoampere-level sensor interfaces.

Compared with OPA4377AIPW, OPA4182AIPW trades 2.9× higher quiescent power for 1.8× wider bandwidth and 25% lower noise, while TLV9064IPW offers lower cost and tighter offset but sacrifices input bias current performance critical for high-Z sensor front-ends.

Availability

OPA4377AIPW is available at Aetrix Electronics and suitable for photodiode preamplification, piezoelectric sensor conditioning, and active filter design requiring stable component supply across industrial, test & measurement, and portable instrumentation programs.

Supply support for OPA4377AIPW 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 OPA4377AIPW - was designed specifically for low-voltage, low-noise, single-supply sensor signal conditioning in battery-powered and space-constrained applications.

FAQ

What is the maximum capacitive load the OPA4377AIPW can drive in unity-gain configuration?

The OPA4377AIPW can directly drive up to 250pF of pure capacitive load in unity-gain buffer configuration without external compensation or instability. This value is verified in the datasheet's "Small-Signal Overshoot vs Load Capacitance" plot (Figure 15). For loads exceeding 250pF, a 10Ω–20Ω series resistor at the output (RS in Figure 24) restores stability while preserving DC accuracy - a technique validated for the OPA4377AIPW in TI's SBOS504B application notes.

Does the OPA4377AIPW support true rail-to-rail input common-mode voltage range?

No - the OPA4377AIPW supports rail-to-rail *output*, but its input common-mode voltage range extends only from (V−) − 0.1V to (V+) + 0.1V, as specified in the Electrical Characteristics table. It does *not* accept inputs beyond the supply rails. For full rail-to-rail input operation, TI recommends alternatives like the OPA491 or OPA4322 families - the OPA4377AIPW is optimized for precision single-supply use where V_CM is biased near mid-supply.

What is the thermal resistance (θ_JA) of the OPA4377AIPW in its TSSOP-14 package?

The OPA4377AIPW in the TSSOP-14 (PW) package has a thermal resistance θ_JA of 150°C/W, as explicitly listed in the Electrical Characteristics table under "Thermal Resistance". This value assumes JEDEC-standard 2-layer board conditions (1-inch² copper pads); actual θ_JA improves with additional PCB copper pour connected to the exposed die pad (tied to V−).

Is the OPA4377AIPW qualified for automotive applications?

The standard OPA4377AIPW is not automotive-qualified. However, Texas Instruments offers the pin-compatible OPA4377-Q1 variant, which is AEC-Q100 Grade 1 qualified (–40°C to +125°C) and manufactured under automotive-specific process controls. The OPA4377AIPW itself is rated for industrial temperature range (–40°C to +125°C) and carries no automotive qualification documentation or stress-test reporting.

How does the EMI input filtering in the OPA4377AIPW improve system-level immunity?

The OPA4377AIPW integrates an on-die low-pass filter with ~75MHz –3dB cutoff that attenuates high-frequency electromagnetic interference before it reaches the input stage. This prevents RF rectification - a mechanism where GHz-range noise demodulates into audible or DC offset shifts - thereby eliminating the need for external ferrite beads or RC filters in EN 55022/IEC 61000-4-3 compliant designs. Verified performance is shown in TI's EMI susceptibility test reports for the OPA377 family.

OPA4377AIPW Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 14-TSSOP (0.173", 4.40mm Width)

Packaging:: Tube

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

OPA4377AIPW FAQ

1.How can I place an order for OPA4377AIPW through Aetrix?

Please submit a Request for Quotation (RFQ) for OPA4377AIPW 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 OPA4377AIPW reliable?

The price and inventory of OPA4377AIPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4377AIPW is usually 5 days.

3.What payment methods are accepted for OPA4377AIPW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4377AIPW transactions.

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4.How is shipping managed for OPA4377AIPW?

OPA4377AIPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your OPA4377AIPW 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 OPA4377AIPW?

For technical support, including OPA4377AIPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4377AIPW requirements.

6.How does Aetrix verify that OPA4377AIPW is sourced from the original manufacturer or authorized distributors?

All OPA4377AIPW 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 OPA4377AIPW meets industry standards.

7.What is the process for return or replacement of OPA4377AIPW?

All OPA4377AIPW units undergo pre-shipment inspection (PSI). If there is an issue with OPA4377AIPW, 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 OPA4377AIPW part is unused and in its original packaging.

Return procedure for OPA4377AIPW:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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