My Inquiry
My Account
Texas Instruments OPA377AIDR
- Part No.:
- OPA377AIDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA377AIDR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,454
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA377AIDR from Texas Instruments is a single, rail-to-rail output CMOS operational amplifier optimized for low-voltage, single-supply applications. It delivers 5.5MHz gain-bandwidth, 7.5nV/√Hz input voltage noise at 1kHz, 0.2pA typical input bias current, and operates from 2.2V to 5.5V supply. It serves as a precision photodiode preamplifier in optical sensing systems.
For engineers reviewing the OPA377AIDR datasheet, OPA377AIDR pinout, OPA377AIDR application, or OPA377AIDR equivalent, key selection criteria include its ultra-low input bias current for high-impedance sensor interfaces, EMI input filtering for noisy environments, and guaranteed rail-to-rail output swing into 10kΩ loads across –40°C to +125°C.
Technical Context
The OPA377AIDR employs a CMOS input stage enabling femtoampere-level input bias current and high input impedance, critical for photodiode and piezoelectric sensor signal conditioning. Its unity-gain stable architecture supports direct use in buffer, inverting, and noninverting configurations without external compensation.
Internal EMI filtering (–3dB at ~75MHz) suppresses high-frequency interference before rectification, while rail-to-rail output swing (within 20mV of rails at 10kΩ) maximizes dynamic range in low-voltage systems. The device maintains 112dB open-loop gain and 70dB CMRR over its full operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 5.5MHz - enables stable amplification up to audio and anti-aliasing filter frequencies with minimal phase lag. |
| Input Voltage Noise Density | 7.5nV/√Hz at 1kHz - ensures minimal added noise in low-level signal chains like photodiode preamps. |
| Input Bias Current | ±0.2pA (typ) - preserves signal integrity in >1GΩ source impedance applications such as scientific sensors. |
| Supply Voltage Range | 2.2V to 5.5V - supports direct battery operation (e.g., 3V coin cell or 4.2V Li-ion) without regulation. |
| Output Swing | Within 20mV of rails (RL = 10kΩ) - delivers full-scale signal headroom in 3.3V or lower systems. |
| Quiescent Current | 0.76mA per amplifier - balances performance and power efficiency for always-on portable instrumentation. |
| Operating Temperature | –40°C to +125°C - qualified for industrial and automotive under-hood environments. |
Pinout & Package
OPA377AIDR is housed in an 8-pin SOIC (D) package with standard industry footprint (5.3mm × 6.2mm), JEDEC MS-012 compliant, and rated MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Unused pad; must be left floating or grounded per layout best practices - no electrical function. |
| 2 (IN–) | Inverting input | High-impedance CMOS node; accepts differential input signals or feedback network connections. |
| 3 (IN+) | Noninverting input | High-impedance CMOS node; connects to reference voltage or sensor signal source. |
| 4 (V–) | Negative supply rail | Ground reference for single-supply operation; thermal die connected internally to this pin. |
| 5 (OUT) | Amplifier output | Rail-to-rail capable output driving up to 20mA short-circuit current; stable with ≤250pF capacitive load. |
| 6 (NC) | No internal connection | Unused pad; no internal bond wire - electrically isolated. |
| 7 (NC) | No internal connection | Unused pad; no internal bond wire - electrically isolated. |
| 8 (V+) | Positive supply rail | Accepts 2.2V–5.5V; requires 0.1µF bypass capacitor placed adjacent to pin for PSRR optimization. |
Key Features
| Feature | Design Value |
|---|---|
| EMI Input Filtering | Integrated low-pass filter (–3dB at ~75MHz) reduces offset shift caused by RF rectification in industrial EMI environments. |
| Rail-to-Rail Output | Swings within 20mV of V+ and V– at 10kΩ load - maximizes usable signal range in 3.3V systems without level-shifting. |
| Ultra-Low Input Bias Current | 0.2pA typical enables accurate amplification of nanoamp-level photodiode currents without significant error. |
| Unity-Gain Stable | No external compensation required - simplifies design of buffers, active filters, and gain-of-one signal conditioning stages. |
| Wide Supply Range | 2.2V to 5.5V operation supports direct connection to unregulated batteries or LDO outputs in space-constrained devices. |
Applications
| Photodiode Preamplifier | Piezoelectric Sensor Preamplifier |
|---|---|
|
Use Scenario: Amplifying weak current from reverse-biased photodiodes in smoke detectors or spectrophotometers. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to voltage with minimal input loading. Use Value: 0.2pA input bias current prevents signal loss across >1GΩ feedback resistors, preserving sensitivity. |
Use Scenario: Conditioning high-impedance charge output from accelerometers or ultrasonic transducers. IC Role / Device Role / Timing Role: Charge-to-voltage converter with high input impedance and low noise floor. Use Value: 7.5nV/√Hz noise density and rail-to-rail output maintain SNR in low-amplitude mechanical sensing. |
| Sensor Signal Conditioning | Audio Equipment |
|
Use Scenario: Front-end amplification for pH electrodes, thermopiles, or strain gauges in portable test equipment. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with low offset drift and high CMRR. Use Value: 0.32mV/°C max dVOS/dT and 70dB min CMRR ensure stable readings across temperature gradients. |
Use Scenario: Line driver or headphone buffer in battery-powered audio players and DAC output stages. IC Role / Device Role / Timing Role: Low-noise, low-distortion unity-gain buffer isolating DAC from variable load impedance. Use Value: 0.00027% THD+N at 1kHz and 2V/ms slew rate support clean audio reproduction without clipping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA377AIDBVR | SOT-23-5 package (5-pin), same electrical specs, smaller footprint (2.9mm × 1.6mm), 3000-piece reel packaging. | Better suited for space-constrained PCBs where SOIC real estate is unavailable; identical performance in photodiode preamp circuits. | Select OPA377AIDBVR when board area is critical and thermal dissipation requirements allow SOT-23 packaging. |
| OPA2377AIDR | Dual-channel version in same SOIC-8 package; shares identical per-channel specs but adds channel separation (≥110dB @ 1kHz). | Enables dual-sensor systems (e.g., differential photodiode pairs) or signal + reference paths without doubling board area. | Choose OPA2377AIDR when two matched amplifiers are needed on one die to minimize tracking errors and layout asymmetry. |
Compared with OPA377AIDR, OPA377AIDBVR offers identical analog performance in a smaller package ideal for miniaturized designs, while OPA2377AIDR provides dual-channel integration for correlated sensing - both require no schematic changes but differ in layout and thermal management considerations.
Availability
OPA377AIDR is available at Aetrix Electronics and suitable for photodiode preamplification, piezoelectric sensor interfacing, and precision analog front-ends requiring stable component supply across industrial temperature ranges.
Supply support for OPA377AIDR 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 was designed specifically for low-voltage, high-fidelity signal conditioning in battery-powered and industrial sensor systems - emphasizing ultra-low input bias current, EMI resilience, and rail-to-rail operation.
FAQ
What is the maximum capacitive load the OPA377AIDR can drive stably?
The OPA377AIDR can directly drive up to 250pF of pure capacitive load in unity-gain configuration without oscillation. For larger loads, a 10Ω–20Ω series resistor at the output improves stability while maintaining DC accuracy. This capability is verified in TI's Small-Signal Overshoot vs Load Capacitance characterization (Figure 15, SBOS504B).
Does the OPA377AIDR support single-supply operation below 2.2V?
No. The OPA377AIDR has a specified minimum supply voltage of 2.2V. Operation below this violates absolute maximum ratings and results in undefined behavior, including degraded gain, increased distortion, and potential output saturation. Designers must ensure V+ ≥ 2.2V relative to V– for guaranteed functionality.
How does the EMI filtering in the OPA377AIDR improve system-level robustness?
The OPA377AIDR integrates internal common-mode and differential-mode low-pass filtering (~75MHz –3dB point), which attenuates RF energy before it reaches the input stage. This prevents rectification-induced offset shifts - a known failure mode in industrial environments with motor drives or wireless transceivers - thereby improving long-term measurement stability without external components.
What is the thermal resistance (θJA) of the OPA377AIDR in SOIC-8 package?
The OPA377AIDR in SOIC-8 (D) package has a junction-to-ambient thermal resistance (θJA) of 150°C/W under standard JEDEC 2-layer board conditions. This value assumes proper PCB copper pour under the exposed pad (pin 4/V–) and adequate airflow; actual thermal performance depends on board layout and heatsinking.
Can the OPA377AIDR replace the OPA2377AIDR in a dual-amplifier circuit?
No - the OPA377AIDR is a single-channel amplifier in SOIC-8, while the OPA2377AIDR contains two independent amplifiers in the same package. Substituting OPA377AIDR would require two devices and double the PCB area, routing, and power consumption. Use OPA2377AIDR only when dual-channel functionality is required.
OPA377AIDR 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:
- General Purpose
- Number of Circuits:
- 1
- 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
- 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:
- 8-SOIC
OPA377AIDR FAQ
1.How can I place an order for OPA377AIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA377AIDR 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 OPA377AIDR reliable?
The price and inventory of OPA377AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA377AIDR is usually 5 days.
3.What payment methods are accepted for OPA377AIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA377AIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA377AIDR?
OPA377AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA377AIDR 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 OPA377AIDR?
For technical support, including OPA377AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA377AIDR requirements.
6.How does Aetrix verify that OPA377AIDR is sourced from the original manufacturer or authorized distributors?
All OPA377AIDR 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 OPA377AIDR meets industry standards.
7.What is the process for return or replacement of OPA377AIDR?
All OPA377AIDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA377AIDR, 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 OPA377AIDR part is unused and in its original packaging.
Return procedure for OPA377AIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA377AIDR Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
