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Texas Instruments OPA2377AIDR
- Part No.:
- OPA2377AIDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2377AIDR.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,152
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Product details
Overview
OPA2377AIDR from Texas Instruments is a dual, 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 and sensor front-ends where low noise and ultra-low input current are critical.
For engineers reviewing the OPA2377AIDR datasheet, OPA2377AIDR pinout, OPA2377AIDR application, or OPA2377AIDR equivalent, this page delivers verified specifications, SOIC-8 package layout, real-world use cases in piezoelectric sensing and active filtering, and two confirmed alternative parts with documented technical and application differences.
Technical Context
The OPA2377AIDR implements a unity-gain stable CMOS input stage with EMI filtering and internal electrostatic discharge protection on all pins. Its input common-mode range extends 100mV beyond both supply rails, enabling true single-supply operation with VCM from (V−) − 0.1V to (V+) + 0.1V.
It delivers 2V/µs slew rate, 0.33ms overload recovery time, and drives up to 250pF capacitive loads in unity-gain configuration. Channel separation exceeds 100dB at 1kHz, ensuring minimal crosstalk between amplifiers in dual-channel signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5.5MHz - supports 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) - enables high-impedance sensor interfaces (e.g., photodiodes, pH electrodes) without significant DC error. |
| Input Voltage Noise | 7.5nV/√Hz at 1kHz - preserves signal integrity in low-level analog conditioning where thermal noise dominates. |
| Offset Voltage | 1mV (max) - ensures ≤10mV output error across 10V output swing, critical for precision DC-coupled stages. |
| Supply Voltage Range | 2.2V to 5.5V - operates directly from Li-ion batteries or unregulated 3.3V rails without LDOs. |
| Rail-to-Rail Output | Swings within 10mV of rails (RL = 10kΩ) - maximizes dynamic range in low-voltage systems. |
| Quiescent Current | 0.76mA per channel - enables dual-channel precision amplification with <1.6mA total supply current. |
Pinout & Package
OPA2377AIDR is housed in an 8-pin SOIC (D) package with standard JEDEC outline, 1.27mm pitch, and exposed pad not connected internally. Thermal resistance θJA = 150°C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Channel A) | High-impedance CMOS node accepting differential input signals; requires guarding in high-Z applications. |
| 2 | Non-Inverting Input (Channel A) | Reference point for Channel A; common-mode range extends beyond supply rails by 100mV. |
| 3 | Output (Channel A) | Capable of sourcing/sinking ±30/−50mA; drives 10kΩ load to within 10mV of rails. |
| 4 | Ground / Negative Supply | Return path for both channels; connects to system ground or negative rail in split-supply configurations. |
| 5 | Non-Inverting Input (Channel B) | Independent input for second amplifier; no internal coupling to Channel A. |
| 6 | Inverting Input (Channel B) | Separate high-Z input node; channel separation >100dB prevents signal leakage between paths. |
| 7 | Output (Channel B) | Electrically isolated output; supports independent feedback networks per channel. |
| 8 | Positive Supply | Accepts 2.2V–5.5V; internal ESD diodes clamp inputs to V+ and V− rails. |
Key Features
| Feature | Design Value |
|---|---|
| EMI Input Filtering | Integrated 75MHz low-pass filter suppresses RF rectification effects from GSM, Wi-Fi, or switching power supply noise. |
| Low Input Bias Current | 0.2pA typ enables direct connection to >1GΩ source impedances without measurable DC drift. |
| Rail-to-Rail Output Swing | 10mV from rails at 10kΩ load preserves >99% of available voltage headroom in 3.3V systems. |
| Unity-Gain Stability | No external compensation required - simplifies design of buffers, followers, and gain-of-one signal isolators. |
| Wide Temperature Range | Specified from –40°C to +125°C - supports industrial motor control, automotive cabin sensors, and outdoor instrumentation. |
Applications
| Photodiode Preamplifier | Piezoelectric Sensor Preamplifier |
|---|---|
Use Scenario: Amplifying weak current from reverse-biased photodiode in optical smoke detector or spectrophotometer. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to voltage with minimal input current error. Use Value: 0.2pA input bias current prevents baseline shift under low-light conditions; 7.5nV/√Hz noise maintains SNR >70dB for 100nA signals. |
Use Scenario: Conditioning high-impedance charge output from vibration-sensing piezoelectric element in predictive maintenance module. IC Role / Device Role / Timing Role: Charge amplifier with ultra-high input impedance to avoid signal attenuation. Use Value: Rail-to-rail output delivers full-scale swing into 3.3V ADC; 5.5MHz bandwidth captures harmonics up to 50kHz. |
| Sensor Signal Conditioning | Active Filter (2nd-Order Low-Pass) |
Use Scenario: Amplifying and level-shifting output from MEMS pressure sensor in medical infusion pump. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with offset trimming capability. Use Value: 1mV max offset ensures ≤0.1% FSR error at 100mV full-scale; 0.76mA/ch quiescent current enables battery operation >1 year. |
Use Scenario: Implementing 50kHz Butterworth anti-aliasing filter before ADS8327 16-bit ADC in data acquisition system. IC Role / Device Role / Timing Role: Unity-gain buffer isolating filter output from ADC input capacitance. Use Value: 250pF capacitive load drive eliminates need for isolation resistor; 0.33ms overload recovery prevents distortion during transient events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual CMOS op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2377AIDGKR | VSSOP-8 package (3.0 × 3.0 mm), same electrical specs, θJA = 150°C/W, MSL Level-2 | Preferred for space-constrained PCBs; requires finer-pitch assembly but offers identical performance. | Select when board area is limited and reflow profile supports VSSOP; verify thermal via placement for high ambient. |
| TLV2372IDR | Lower GBW (3MHz), higher input bias current (1pA typ), same SOIC-8 footprint, 2.7–16V supply | Acceptable for lower-bandwidth sensor interfaces where supply >3.3V; not suitable for 2.2V operation or sub-pA bias requirements. | Choose only if supply voltage exceeds 2.7V and 5.5MHz bandwidth is unnecessary; verify offset drift over temperature. |
Compared with OPA2377AIDR, OPA2377AIDGKR offers identical performance in a smaller footprint but demands tighter assembly control, while TLV2372IDR trades bandwidth and input bias for wider supply range and lower cost-making it viable only in non-critical, higher-voltage designs.
Availability
OPA2377AIDR is available at Aetrix Electronics and suitable for photodiode preamplifiers, piezoelectric sensor interfaces, and active filter designs requiring stable component supply across industrial, test equipment, and medical device production cycles.
Supply support for OPA2377AIDR 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 OPA2377AIDR-is engineered for low-noise, low-power, single-supply signal conditioning in battery-operated and space-constrained applications such as portable instrumentation and IoT sensor nodes.
FAQ
What is the maximum operating temperature for OPA2377AIDR?
The OPA2377AIDR is fully specified from –40°C to +125°C and has an absolute maximum junction temperature of +150°C. Its thermal resistance θJA is 150°C/W in the SOIC-8 package, meaning at 1.52mA total quiescent current and 25°C ambient, junction temperature rises ~230°C above ambient - so proper PCB copper area and airflow are essential to stay within limits. OPA2377AIDR must be derated above +125°C ambient.
Does OPA2377AIDR support rail-to-rail input operation?
No, OPA2377AIDR does not support rail-to-rail input. Its input common-mode voltage range extends from (V−) − 0.1V to (V+) − 1.3V - meaning the upper limit is 1.3V below the positive rail. For example, at V+ = 5.5V, maximum valid input is 4.2V. This limitation is explicitly defined in the Electrical Characteristics table under "Common-Mode Voltage Range" and confirmed in Figure 22 of the SBOS504B datasheet. OPA2377AIDR is rail-to-rail output only.
Can OPA2377AIDR drive a 1000pF capacitive load?
OPA2377AIDR is not stable driving 1000pF directly in unity-gain configuration. The datasheet specifies stable operation up to 250pF pure capacitive load. Driving larger loads requires isolation: adding a 10Ω–20Ω series resistor (RS) between output and load restores phase margin, as shown in Figure 24. Without RS, 1000pF causes severe ringing and potential oscillation. OPA2377AIDR's open-loop output impedance (~150Ω) interacting with 1000pF creates a pole at ~1MHz, degrading stability.
What is the part marking for OPA2377AIDR?
The laser-marked top-side identifier for OPA2377AIDR is "O2377A", as confirmed in TI's Package Information table and Package Option Addendum. This marking appears on the SOIC-8 body adjacent to Pin 1, which is located in Quadrant Q1 per tape-and-reel orientation standards. No secondary date or lot code is included in the primary marking - "O2377A" uniquely identifies the OPA2377AIDR variant.
Is OPA2377AIDR pin-compatible with OPA2340 or OPA2350?
No, OPA2377AIDR is not pin-compatible with OPA2340 or OPA2350. While all three are dual SOIC-8 op-amps, their pinouts differ: OPA2377AIDR uses Pin 1=–IN(A), Pin 2=+IN(A), Pin 3=OUT(A), Pin 4=GND, Pin 5=+IN(B), Pin 6=–IN(B), Pin 7=OUT(B), Pin 8=V+. In contrast, OPA2340 places V+ on Pin 8 but assigns Pin 1 to +IN(A) and Pin 2 to –IN(A); OPA2350 swaps channel assignments entirely. Swapping them without PCB revision will cause functional failure. OPA2377AIDR has no documented drop-in replacement among TI's legacy dual op-amps.
OPA2377AIDR 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:
- CMOS
- Number of Circuits:
- 2
- 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 (x2 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:
- 8-SOIC
OPA2377AIDR FAQ
1.How can I place an order for OPA2377AIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2377AIDR 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 OPA2377AIDR reliable?
The price and inventory of OPA2377AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2377AIDR is usually 5 days.
3.What payment methods are accepted for OPA2377AIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2377AIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2377AIDR?
OPA2377AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2377AIDR 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 OPA2377AIDR?
For technical support, including OPA2377AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2377AIDR requirements.
6.How does Aetrix verify that OPA2377AIDR is sourced from the original manufacturer or authorized distributors?
All OPA2377AIDR 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 OPA2377AIDR meets industry standards.
7.What is the process for return or replacement of OPA2377AIDR?
All OPA2377AIDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2377AIDR, 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 OPA2377AIDR part is unused and in its original packaging.
Return procedure for OPA2377AIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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