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Texas Instruments OPA2391YBJR
- Part No.:
- OPA2391YBJR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 9-XFBGA, DSBGA
- Datasheet:
-
OPA2391YBJR.pdf
- Description:
- AMPLIFIER
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
OPA2391YBJR from Texas Instruments is a dual-channel, precision rail-to-rail input/output operational amplifier featuring e-trim™ technology. It delivers ±45 µV maximum input offset voltage, 1 MHz gain-bandwidth product, and ultra-low 24 µA quiescent current per channel - enabling high-accuracy, low-power signal conditioning in battery-operated sensor front ends such as blood glucose monitors and pressure transmitters.
For engineers reviewing the OPA2391YBJR datasheet, OPA2391YBJR pinout, OPA2391YBJR application, or OPA2391YBJR equivalent, key selection criteria include its 10 fA input bias current at 25°C, ±1.2 µV/°C offset drift over –40°C to +125°C, 1 V/µs slew rate, and DSBGA-9 (YBJ) package with integrated enable pin for power-gated dual-amplifier operation.
Technical Context
The OPA2391YBJR employs CMOS-based e-trim™ architecture to achieve ultra-low offset without auto-zero or chopper switching - eliminating switching artifacts and enabling clean DC-coupled amplification. Its input stage supports rail-to-rail common-mode range (±100 mV beyond rails) and differential input voltages up to supply rails, with no internal clamping diodes.
It integrates an enable (EN) pin (B2) that independently controls both amplifiers, reducing quiescent current to 3.5 µA per channel when disabled. The robust output stage drives ≥60 mA and remains stable with high capacitive loads, addressing a key limitation of conventional low-IQ op amps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain bandwidth product | 1 MHz - enables stable unity-gain operation with bandwidth sufficient for sensor signal conditioning up to ~100 kHz. |
| Input offset voltage (max) | ±45 µV - ensures ≤0.0045% error in 1-V full-scale ratiometric measurements without trimming. |
| Offset drift (max) | ±1.2 µV/°C - limits temperature-induced error to < ±150 µV across –40°C to +125°C industrial range. |
| Quiescent current (per channel) | 24 µA - allows continuous operation for >1 year on a single CR2032 coin cell in low-duty-cycle sensor nodes. |
| Input bias current (max) | 35 pA at +125°C - preserves signal integrity in >100 MΩ source impedance applications like pH electrodes and photodiode transimpedance stages. |
| Slew rate | 1 V/µs - supports 100-kHz full-power bandwidth for 1-VPP signals, suitable for fast-settling analog security camera front ends. |
| Supply voltage range | 1.7 V to 5.5 V - compatible with single-cell Li-ion, 3.3-V logic, and 5-V legacy systems without level-shifting. |
Pinout & Package
OPA2391YBJR uses a 9-pin DSBGA (YBJ) package measuring 1.37 mm × 1.37 mm × 0.54 mm, optimized for space-constrained wearable and medical sensor patches.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A (A1) | Output, Channel A | Capable of sourcing/sinking ≥60 mA; rail-to-rail swing within 12 mV of rails at 125°C with 2-kΩ load. |
| OUT B (A3) | Output, Channel B | Independent output with identical drive strength and settling behavior as OUT A. |
| V+ (A2) | Positive supply | Accepts 1.7–5.5 V; supplies both amplifiers and EN logic; decoupling required within 2 mm. |
| V– (C2) | Negative supply | Ground reference for single-supply operation; supports true rail-to-rail input down to V– – 0.1 V. |
| +IN A (C1) | Noninverting input, Ch A | CMOS input with 1 TΩ || 1 pF impedance; accepts common-mode voltage up to V+ + 0.1 V. |
| –IN A (B1) | Inverting input, Ch A | Matches +IN A characteristics; differential input voltage unrestricted between rails. |
| +IN B (C3) | Noninverting input, Ch B | Electrically isolated from Ch A inputs; enables independent dual-sensor buffering. |
| –IN B (B3) | Inverting input, Ch B | Supports high-Z feedback networks without leakage-induced gain error. |
| EN (B2) | Enable control | Active-high logic input; pulls both amplifiers into 3.5 µA shutdown state when driven to V–. |
Key Features
| Feature | Design Value |
|---|---|
| e-trim™ offset calibration | Eliminates need for external trimming or auto-zero circuitry while maintaining ±45 µV max offset across temperature and life. |
| Rail-to-rail I/O with extended CMVR | Inputs operate from V– – 0.1 V to V+ + 0.1 V; outputs swing to within 3 mV of rails (no load), enabling full dynamic range utilization. |
| EMI/RFI filtered inputs | Integrated input filtering provides >80 dB rejection at 900 MHz (EMIRR IN+ = 120 dB at 10 MHz), critical for analog security cameras in noisy RF environments. |
| High capacitive load drive | Stable with ≥1 nF load capacitance without isolation resistor, simplifying anti-aliasing filter design in process analytics transmitters. |
| Dual-channel enable control | Single EN pin gates both amplifiers simultaneously, enabling synchronized power cycling in multi-sensor data acquisition systems. |
Applications
| Blood Glucose Monitor | Pressure Transmitter |
|---|---|
Use Scenario: Amplifies low-level current from electrochemical test strip during enzymatic reaction. IC Role / Device Role / Timing Role: Precision transimpedance amplifier with ultra-low input bias current to prevent measurement drift. Use Value: 10 fA input bias current avoids >1% error in 100-MΩ strip impedance; 24 µA IQ extends disposable device battery life. | Use Scenario: Conditions bridge output in industrial pressure sensors with 4–20 mA loop interface. IC Role / Device Role / Timing Role: High-precision, low-drift instrumentation amplifier front end with rail-to-rail output drive. Use Value: ±45 µV offset and ±1.2 µV/°C drift ensure <0.1% FS error over temperature; 60 mA output drives loop drivers directly. |
| Wearable Fitness Monitor | Gas Detector |
Use Scenario: Buffers photoplethysmography (PPG) signal from optical heart-rate sensor. IC Role / Device Role / Timing Role: Low-noise, low-power signal buffer with EMI-hardened inputs for noisy digital environments. Use Value: 130 nV/√Hz input voltage noise at 10 Hz preserves microvolt-level AC PPG signal; 1.37 mm² DSBGA fits ultra-thin wearables. | Use Scenario: Amplifies low-current output from electrochemical gas sensing cells. IC Role / Device Role / Timing Role: Ultra-high-impedance, low-offset front-end amplifier for amperometric detection. Use Value: 35 pA max input bias current at 125°C prevents baseline shift in high-temp industrial gas detectors; 1.7 V min supply supports energy-harvesting designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision, low-power operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333PDR | Chopper-stabilized; 0.02 µV/°C drift but higher 17 µVPP 1/f noise; 17 µA IQ; SOIC-8 only. | Superior drift performance but unsuitable for low-noise AC-coupled biosensing due to chopping artifacts. | Select OPA2333PDR only when sub-µV/°C drift dominates over noise and EMI requirements. |
| LTC2050HMS8#PBF | Zero-drift chopper; 0.25 µV max offset; 1.5 µA IQ; requires external charge-balancing capacitor; MSOP-8. | Ultra-low IQ ideal for energy-harvesting gas sensors, but lacks EN pin and rail-to-rail output swing. | Choose LTC2050HMS8#PBF when minimum power (<2 µA) outweighs need for integrated enable and full output swing. |
Compared with OPA2333PDR and LTC2050HMS8#PBF, the OPA2391YBJR uniquely balances ultra-low offset (±45 µV), ultra-low drift (±1.2 µV/°C), EMI-hardened inputs, and integrated enable - making it optimal for compact, battery-powered, high-reliability sensor front ends where noise, stability, and power gating are co-critical.
Availability
OPA2391YBJR is available at Aetrix Electronics and suitable for portable electronics, medical sensor patches, and building automation systems requiring stable component supply, long-term manufacturability, and guaranteed traceability.
Supply support for OPA2391YBJR 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 delivering analog and embedded processing solutions, with deep expertise in precision signal chain design and high-volume manufacturing reliability.
The OPAx391 family was engineered specifically for ultra-low-power, high-precision sensor signal conditioning - targeting applications where input bias current, offset voltage, and quiescent current must all be minimized simultaneously without sacrificing bandwidth or stability.
FAQ
What is the maximum operating temperature range for the OPA2391YBJR?
The OPA2391YBJR is specified for operation from –40°C to +125°C, with electrical characteristics guaranteed across this full industrial temperature range. Its ±45 µV maximum input offset voltage and ±1.2 µV/°C drift are validated under these conditions, making it suitable for under-hood automotive sensors and industrial process transmitters. The DSBGA-9 package's thermal resistance (RθJA = 110.7°C/W) supports reliable operation at elevated ambient temperatures when properly mounted on thermally enhanced PCBs.
Does the OPA2391YBJR require external compensation for stability?
No, the OPA2391YBJR is unity-gain stable and does not require external compensation components. Its advanced output stage maintains phase margin >60° with ≥1 nF capacitive load, even without series isolation resistors - a key advantage over many low-IQ op amps. This eliminates layout complexity in applications like analog security camera video buffers and flow transmitter signal chains where long traces or filter capacitors are unavoidable.
How does the enable (EN) pin function on the OPA2391YBJR?
The EN pin (B2) on the OPA2391YBJR is an active-high digital control that simultaneously disables both amplifiers. When pulled to V–, it reduces total quiescent current to 3.5 µA (1.75 µA per channel), enabling aggressive power cycling in duty-cycled sensor systems. Enable/disable timing is characterized at 75 µs (tON) and 4 µs (tOFF), supporting rapid wake-up in wearable fitness monitors. The pin exhibits ±0.01 µA leakage at V+, ensuring minimal impact on high-impedance bias networks.
Can the OPA2391YBJR drive a 10-kΩ load rail-to-rail?
Yes, the OPA2391YBJR delivers true rail-to-rail output swing into 10-kΩ loads, with voltage swing limited to within 10 mV of each rail at 25°C and within 12 mV at +125°C. This performance is maintained across the full 1.7–5.5 V supply range, enabling accurate interfacing with 12-bit and 16-bit SAR ADCs without level-shifting. Its 60 mA short-circuit current capability further ensures robustness against transient overload conditions in industrial transmitters.
Is the OPA2391YBJR compatible with lead-free reflow soldering processes?
Yes, the OPA2391YBJR's DSBGA-9 (YBJ) package is rated for standard lead-free reflow profiles per JEDEC J-STD-020, with a peak temperature of 260°C. Its 1.37 mm × 1.37 mm footprint and 0.4-mm ball pitch are compatible with automated SMT assembly using Type 3 or Type 4 solder paste. Texas Instruments specifies moisture sensitivity level (MSL) 1 for this part, meaning it can be stored indefinitely at ≤30°C/60% RH without baking prior to assembly.
OPA2391YBJR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 9-XFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.01 pA
- Voltage - Input Offset:
- 60 µV
- Current - Supply:
- 24µA (x2 Channels)
- Current - Output / Channel:
- 60 mA
- Voltage - Supply Span (Min):
- 1.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-DSBGA (1.16x1.16)
OPA2391YBJR FAQ
1.How can I place an order for OPA2391YBJR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2391YBJR 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 OPA2391YBJR reliable?
The price and inventory of OPA2391YBJR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2391YBJR is usually 5 days.
3.What payment methods are accepted for OPA2391YBJR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2391YBJR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2391YBJR?
OPA2391YBJR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2391YBJR 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 OPA2391YBJR?
For technical support, including OPA2391YBJR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2391YBJR requirements.
6.How does Aetrix verify that OPA2391YBJR is sourced from the original manufacturer or authorized distributors?
All OPA2391YBJR 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 OPA2391YBJR meets industry standards.
7.What is the process for return or replacement of OPA2391YBJR?
All OPA2391YBJR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2391YBJR, 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 OPA2391YBJR part is unused and in its original packaging.
Return procedure for OPA2391YBJR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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