OPA2107AU/2K5 - Precision Dual Difet Op Amp 4.5MHz SOIC-8 | TI
MPN: OPA2107AU/2K5 β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.2 | $6.20 |
| 10 | $5.65 | $56.50 |
| 100 | $5.1 | $510.00 |
| 500 | $4.65 | $2,325.00 |
| 1,000 | $4.2 | $4,200.00 |
| 2,500 | $3.9 | $9,750.00 |
Drop-in alternatives for OPA2107AU/2K5 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
OPA2107BM
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$7.95 / Unit
View Datasheet βOPA2132UA
β Drop-Inπ Reference alternative (not in catalog)
OPA277UA/2K5
β Drop-Inπ Reference alternative (not in catalog)
OPA602AU/2K5
β Drop-Inβ In Stock
$10.5 / Unit
View Datasheet βOPA2107KP
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
OPA2107AU/2K5 Maximum Ratings & Electrical Characteristics
| Number of Channels | 2 |
| Gain Bandwidth Product | 4.5 MHz |
| Supply Voltage Range | Up to 30 V total (typ. +/-15 V) |
| Input Offset Voltage | 1 mV max |
| Offset Voltage Drift | 10 uV/C max |
| Input Bias Current | 10 pA max |
| Input Voltage Noise | Low noise at 10 kHz (see datasheet for value) |
| Settling Time | Fast settling to 0.01% |
| Stability | Unity-gain stable |
| Amplifier Type | Precision Difet (JFET input) operational amplifier |
| Operating Temperature Range | -25C to +85C |
| Package | 8-pin SOIC (D) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (/2K5 suffix, 2500 units per reel) |
| RoHS Status | Compliant |
| REACH Status | Compliant |
| Lifecycle Status | In process of being discontinued |
OPA2107AU/2K5 Pin Configuration
| Pin 1 | OUT A β Channel A output |
| Pin 2 | -IN A β Channel A inverting input |
| Pin 3 | +IN A β Channel A non-inverting input |
| Pin 4 | V- β Negative supply |
| Pin 5 | +IN B β Channel B non-inverting input |
| Pin 6 | -IN B β Channel B inverting input |
| Pin 7 | OUT B β Channel B output |
| Pin 8 | V+ β Positive supply |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
OPA2107AU/2K5 is suitable for 6 applications: Data Acquisition Front Ends, DAC Output Amplifiers, Photodiode and Optoelectronic Receivers, High-Impedance Sensor Interfaces, Active Filters and Precision Signal Chains, Instrumentation and Test Equipment Retrofit.
Data Acquisition Front Ends
The OPA2107AU/2K5 fits data acquisition signal conditioning where its 1 mV max offset and 10 uV/C drift keep gain-stage errors inside a 12- to 16-bit system's LSB budget. The 4.5 MHz gain bandwidth supports gains of 10 to 100 while maintaining settling adequate for medium-speed multiplexed ADC inputs, and the 10 pA max bias current prevents loading of high-source-impedance signals upstream of the multiplexer. Placed as a non-inverting gain stage ahead of the ADC with a low-value series resistor for input protection, the Difet input preserves accuracy across the -25C to +85C industrial range. The dual-channel integration also lets one package buffer both the signal and the ADC reference divider, improving channel-to-channel thermal tracking. Trade-off: at large gains, verify the 0.01% settling time against your ADC sampling rate, since bandwidth rolls off with closed-loop gain.
Recommended
DAC Output Amplifiers
The manufacturer datasheet lists DAC output buffering as a primary OPA2107 application. Current-output DACs require a transimpedance stage with low bias current so the DAC's full-scale current is not shunted by amplifier input current error; the OPA2107's 10 pA max Difet bias current makes this error negligible for typical 1-2 mA DAC full-scale currents. Fast settling to 0.01% and unity-gain stability allow direct compensation-free use in the feedback loop of a current-to-voltage converter with a wide range of feedback capacitor values. The dual channels let one SOIC-8 buffer both the signal output and a complementary reference or I/U stage. Performance consideration: at bipolar +/-15 V supplies the output swing supports Β±10 V signal ranges, but check the datasheet output short-circuit and capacitive-load guidance to avoid ringing when driving long cables.
Recommended
Photodiode and Optoelectronic Receivers
Optoelectronics - photodiode receivers in particular - demand the OPA2107's combination of 10 pA max input bias current and low noise at 10 kHz. In a transimpedance configuration, the photodiode capacitance and the feedback resistor set the noise gain peaking; the 4.5 MHz gain bandwidth provides enough loop margin for typical TIA feedback networks in the 100 kΞ© to 10 MΞ© range. Because Difet bias current stays low at elevated temperatures, dark-current measurement accuracy does not degrade the way it would with a standard JFET-input amplifier in an enclosed instrument. Layout note: keep the summing node trace short and guard it with a driven shield connected to the non-inverting input reference to preserve the sub-pA-level effective error. The dual channels enable differential photodiode pairs or a TIA plus post-gain stage in one footprint.
Recommended
High-Impedance Sensor Interfaces
pH probes, piezoelectric accelerometers, and capacitive sensors present source impedances from megohms to gigohms, where input bias current converts directly into offset error: 10 pA across a 10 MΞ© source is already 100 uV. The OPA2107AU/2K5's Difet input stage, specified at 10 pA max bias and 1 mV max offset, was designed for exactly this class of interface, as stated in the manufacturer's applications list. Use the non-inverting configuration with high-value (1-10 MΞ©) bias-return resistors, and route the high-impedance node on a guarded PCB island to limit leakage. The -25C to +85C range covers most industrial environments, but note that any residual input current roughly doubles every 10C, so position the amplifier away from heat sources for the best low-level accuracy in warm enclosures.
Recommended
Active Filters and Precision Signal Chains
Unity-gain stability and fast 0.01% settling make the OPA2107AU/2K5 well suited to Sallen-Key and multiple-feedback active filters in audio and instrumentation bandwidths. The 4.5 MHz gain bandwidth supports accurate filter corner frequencies up to tens of kilohertz without significant Q degradation: as a rule of thumb, keep the filter corner at least 100x below the bandwidth to hold passives-dominated accuracy. The dual channels implement a two-pole section per package, and Difet bias current allows the multi-megohm resistor values that keep capacitor sizes practical in low-frequency designs. Precision consideration: use 1% or better resistors and C0G/NP0 capacitors, since passive tolerance, not the amplifier, will dominate the response accuracy. The Β±15 V supply capability preserves headroom for large-signal filter applications.
Recommended
Instrumentation and Test Equipment Retrofit
Because the OPA2107AU/2K5 runs on Β±15 V rails with a 30 V total supply limit, it is a direct fit for maintaining and retrofitting legacy bench instruments, data loggers, and industrial controllers built around Β±15 V analog subsystems. Its industry-standard dual op-amp SOIC-8 pinout means failed or EOL general-purpose duals in existing boards can frequently be requalified onto the OPA2107 with minimal redesign - valuable now that TI has marked the part as discontinued and engineers must both source remaining stock and plan second-source qualification. The Difet precision (1 mV offset, 10 pA bias) often exceeds the specification of the original general-purpose parts, upgrading measurement margin during repair. For repairs, prefer date-code-recent authorized stock and document the substitute selection for quality traceability.
Recommended
Recommended Products Summary
Engineering reference data for OPA2107AU/2K5 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | OPA2107BM | OPA2132UA | OPA277UA/2K5 | OPA602AU/2K5 |
|---|---|---|---|---|---|
| Package | SOIC-8 (D) | SOIC-8 (D) - same | SOIC-8 (D) - same | SOIC-8 (D) - same | SOIC-8 (D) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Channels | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) | [DATA_NEEDED] |
| Gain Bandwidth | 4.5 MHz | 4.5 MHz | 8 MHz | 1 MHz | [DATA_NEEDED] |
| Input Offset Voltage (max) | 1 mV | Tighter B-grade limit (lower than A-grade) | [DATA_NEEDED] | Far lower than 1 mV (precision bipolar) | [DATA_NEEDED] |
| Input Bias Current (max) | 10 pA | 10 pA (same die) | JFET input, pA-class | Higher (bipolar input, nA-class) | pA-class (FET input) |
| Offset Drift (max) | 10 uV/C | Tighter B-grade limit | [DATA_NEEDED] | Far lower (precision bipolar) | [DATA_NEEDED] |
| Supply Voltage | Up to 30 V total (typ. +/-15 V) | Same (30 V total) | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Lifecycle Status | Being discontinued (EOL) | Same family - verify status | Active | Active | Same family - verify status |
Key Differentiators
- Difet input with 10 pA max bias current (vs OPA277UA/2K5)
- B-grade die option within same footprint (vs OPA2107BM)
- Faster small-signal dynamics (vs OPA277UA/2K5)
Design Notes
The OPA2107AU/2K5 is in the process of being discontinued according to TI.com. If this part is in a production BOM, execute a last-time-buy sized to your field-failure forecast, and qualify OPA2107BM (same die, B-grade) or OPA277UA/2K5 (SOIC-8 footprint-compatible) as the second source now rather than at shortage time. Broker-channel material should be date-code verified and, ideally, electrically sampled, since EOL parts attract counterfeit stock.
For high-impedance nodes (photodiode anode, pH probe, or charge integrator summing junction), place the OPA2107 within a few millimeters of the sensor and surround the input trace with a guard ring driven from the low-impedance reference (typically the non-inverting input potential). Difet inputs have 10 pA max bias, but PCB surface leakage across a contaminated board can exceed this by orders of magnitude - guarding plus a no-clean or conformal flux strategy preserves the low-bias advantage.
Decouple V+ and V- with 0.1 uF ceramic capacitors placed within a few millimeters of pins 8 and 4, plus a 4.7-10 uF bulk capacitor per rail. At +/-15 V the 30 V total supply limit leaves no margin for rail transients: Estimated - a 15.5 V per-rail surge from an unregulated supply would put the part beyond its ratings, so verify worst-case rail excursions (including turn-off undershoot on the opposite rail) against the absolute maximum ratings. Series input resistors protect against electrostatic and overvoltage events at high-impedance inputs.
Compliance Information
Per Abacus Technologies distributor compliance data: EU RoHS Compliant, REACH Compliant, PFAS: NO, DRC Status: DRC Conflict Free. Halogen-free status not stated in provided data.
