Specifications
| Type | Description |
|---|---|
| Part Number | OPA855 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package Case | DSG WSON-8, 2 mm x 2 mm; bare die 0.751 mm x 0.705 mm |
| Gain bandwidth product | 8 GHz; feature summary; electrical characteristics at VS+=5 V, VS-=0 V, G=7 V/V, RF=453 ohm, RL=200 ohm, TA=25°C |
| Minimum stable gain | 7 V/V; decompensated amplifier; stable for gain >= 7 V/V |
| Input voltage noise | 0.98 nV/sqrt(Hz); f=1 MHz |
| Slew rate | 2750 V/us; 10%-90%, VOUT=2 V step |
| Common-mode input capacitance | 0.6 pF; electrical characteristics |
| Differential input capacitance | 0.2 pF; electrical characteristics |
| Supply voltage range | 3.3 V min, 5 V nom, 5.25 V max; recommended operating conditions, total supply voltage VS+ - VS- |
| Quiescent current | 16 mA min, 17.8 mA typ, 19.5 mA max; TA=25°C unless otherwise noted |
| Operating free-air temperature | -40°C to +125°C; recommended operating conditions |
| Package | 8-pin WSON, DSG; package information |
| Bare die size | 0.751 mm x 0.705 mm nominal; device information |
| Small-signal bandwidth | 2.5 GHz typ; VOUT=100 mVPP |
| Large-signal bandwidth | 850 MHz typ; VOUT=2 VPP |
| Bandwidth for 0.1-dB flatness | 200 MHz typ; electrical characteristics |
| Rise time | 0.17 ns typ; VOUT=100 mV step |
| Fall time | 0.17 ns typ; VOUT=100 mV step |
| Settling time to 0.1% | 2.3 ns typ; VOUT=2 V step |
| Settling time to 0.001% | 2600 ns typ; VOUT=2 V step |
| Overshoot or undershoot | 5% typ; VOUT=2 V step |
| Overdrive recovery | 3 ns typ; 2x output overdrive |
| Second-order harmonic distortion at 10 MHz | 90 dBc typ; f=10 MHz, VOUT=2 VPP |
| Second-order harmonic distortion at 100 MHz | 65 dBc typ; f=100 MHz, VOUT=2 VPP |
| Third-order harmonic distortion at 10 MHz | 86 dBc typ; f=10 MHz, VOUT=2 VPP |
| Third-order harmonic distortion at 100 MHz | 74 dBc typ; f=100 MHz, VOUT=2 VPP |
| Input-referred current noise | 2.5 pA/sqrt(Hz) typ; f=1 MHz |
| Closed-loop output impedance | 0.15 ohm typ; f=1 MHz |
| Open-loop voltage gain | 70 dB min, 76 dB typ; electrical characteristics; min/max limits do not apply for bare die |
| Input offset voltage | -1.5 mV min, +/-0.2 mV typ, 1.5 mV max; TA=25°C; min/max limits do not apply for bare die |
| Input offset voltage drift | 0.5 uV/°C typ; TA=-40°C to +125°C |
| Input bias current | -18.5 uA min, -12 uA typ, -5 uA max; TA=25°C; current flowing into input pin is negative |
| Input bias current drift | -0.08 uA/°C typ; TA=-40°C to +125°C |
| Input offset current | -1 uA min, +/-0.1 uA typ, 1 uA max; TA=25°C; min/max limits do not apply for bare die |
| Input offset current drift | 1 nA/°C typ; TA=-40°C to +125°C |
| Common-mode rejection ratio | 90 dB min, 100 dB typ; VCM=+/-0.5 V referred to midsupply; min/max limits do not apply for bare die |
| Common-mode input resistance | 2.3 Mohm typ; electrical characteristics |
| Differential input resistance | 5 kohm typ; electrical characteristics |
| Common-mode input range high at 3.3 V | 2.7 V min, 2.9 V typ; CMRR > 80 dB, VS+=3.3 V |
| Common-mode input range low at 3.3 V | 1.1 V typ, 1.3 V max; CMRR > 80 dB, VS+=3.3 V |
| Common-mode input range high at 5 V | 4.4 V min, 4.6 V typ; CMRR > 80 dB, VS+=5 V |
| Common-mode input range high over temperature | 4.3 V min; TA=-40°C to +125°C, CMRR > 80 dB |
| Common-mode input range low at 5 V | 1.1 V typ, 1.3 V max; CMRR > 80 dB, VS+=5 V |
| Common-mode input range low over temperature | 1.3 V max; TA=-40°C to +125°C, CMRR > 80 dB |
| Output voltage high at 3.3 V | 2.35 V min, 2.4 V typ; TA=25°C, VS+=3.3 V, amplifier output saturated |
| Output voltage high at 5 V | 3.95 V min, 4.1 V typ; TA=25°C, VS+=5 V, amplifier output saturated |
| Output voltage high over temperature | 4 V min; TA=-40°C to +125°C, VS+=5 V, amplifier output saturated |
| Output voltage low at 3.3 V | 1.05 V typ, 1.15 V max; TA=25°C, VS+=3.3 V, amplifier output saturated |
| Output voltage low at 5 V | 1.05 V typ, 1.15 V max; TA=25°C, VS+=5 V, amplifier output saturated |
| Output voltage low over temperature | 1.1 V max; TA=-40°C to +125°C, VS+=5 V, amplifier output saturated |
| Linear output drive sink and source | 65 mA min, 80 mA typ; RL=10 ohm, AOL > 60 dB; min/max limits do not apply for bare die |
| Linear output drive sink and source over temperature | 70 mA min; TA=-40°C to +125°C, RL=10 ohm, AOL > 60 dB |
| Output short-circuit current | 85 mA min, 105 mA typ; min/max limits do not apply for bare die |
| Quiescent current at -40°C | 16.7 mA typ; TA=-40°C |
| Quiescent current at 125°C | 19.5 mA typ; TA=125°C |
| Positive power-supply rejection ratio | 80 dB min, 86 dB typ; min/max limits do not apply for bare die |
| Negative power-supply rejection ratio | 70 dB min, 80 dB typ; min/max limits do not apply for bare die |
| Disable voltage threshold | 0.65 V min, 1 V max; amplifier off when less than this voltage |
| Enable voltage threshold | 1.5 V min, 1.8 V max; amplifier on when less than this voltage |
| Power-down quiescent current | 70 uA typ, 140 uA max; power-down mode |
| PD bias current | 70 uA typ, 140 uA max; power-down pin |
| Turn-on time delay | 15 ns typ; time to VOUT=90% of final value |
| Turn-off time delay | 120 ns typ; power-down switching |
| Absolute maximum total supply voltage | 5.5 V max; VS+ - VS-; absolute maximum rating |
| Absolute maximum input voltage | VS- - 0.5 V min to VS+ + 0.5 V max; VIN+, VIN-; absolute maximum rating |
| Absolute maximum differential input voltage | 1 V max; absolute maximum rating |
| Absolute maximum output voltage | VS- - 0.5 V min to VS+ + 0.5 V max; absolute maximum rating |
| Continuous input current | +/-10 mA max; absolute maximum rating |
| Continuous output current | +/-100 mA max; long-term continuous output current for electromigration limits |
| Junction temperature | 150°C max; absolute maximum rating |
| Storage temperature | -65°C to +150°C; absolute maximum rating |
| HBM ESD rating | +/-1500 V; human body model per ANSI/ESDA/JEDEC JS-001, all pins |
| CDM ESD rating | +/-1500 V; charged device model per JEDEC JS-002, all pins |
| Junction-to-ambient thermal resistance | 80.1°C/W; DSG WSON-8 package |
| Junction-to-case top thermal resistance | 100°C/W; DSG WSON-8 package |
| Junction-to-board thermal resistance | 45°C/W; DSG WSON-8 package |
| Junction-to-top characterization parameter | 6.8°C/W; DSG WSON-8 package |
| Junction-to-board characterization parameter | 45.2°C/W; DSG WSON-8 package |
| Junction-to-case bottom thermal resistance | 22.7°C/W; DSG WSON-8 package |
| Pin 1 function | FB, input; feedback connection to output of amplifier, DSG package |
| Pin 3 function | IN-, input; inverting input, DSG package |
| Pin 4 function | IN+, input; noninverting input, DSG package |
| Pin 6 function | OUT, output; amplifier output, DSG package |
| Pin 8 function | PD, input; PD logic low = power off mode; PD logic high = normal operation, DSG package |
| Pin 5 function | VS-; negative voltage supply, DSG package |
| Pin 7 function | VS+; positive voltage supply, DSG package |
| Thermal pad connection | Connect to VS-; DSG WSON-8 package |
| Bare die thickness | 381 um; bare die information |
| Bare die backside finish | Silicon with backgrind; bare die information |
| Bare die backside potential | Electrically connected to VS-; bare die information |
| Bare die bond pad metallization | AlCu; bare die information |
| Datasheet Status | request_only |
Product Overview
The OPA855 is a Texas Instruments wideband low-noise bipolar-input operational amplifier for Signal_Chain designs that require high bandwidth, fast settling, and low input voltage noise. It has an 8 GHz gain bandwidth product and is decompensated for stable operation at gains of 7 V/V and above. With 2.5 GHz typical small-signal bandwidth, 850 MHz typical large-signal bandwidth, and 200 MHz typical 0.1-dB flatness bandwidth, it fits high-speed gain and measurement paths.
Dynamic performance includes 0.98 nV/sqrt(Hz) input voltage noise at 1 MHz, 2.5 pA/sqrt(Hz) typical input-referred current noise, 2750 V/us slew rate for a 2 V output step, 0.17 ns rise and fall times for a 100 mV step, and 2.3 ns settling to 0.1% for a 2 V step. Harmonic distortion is specified at 10 MHz and 100 MHz with 2 VPP output.
The device is offered in an 8-pin DSG WSON package and as bare die. Package and assembly data include a 2 mm x 2 mm WSON body, thermal pad connection to VS-, 80.1°C/W junction-to-ambient resistance, and bare-die backside electrically connected to VS-.
Key Features
- 8 GHz gain bandwidth product at gain of 7 V/V
- 0.98 nV/sqrt(Hz) input voltage noise at 1 MHz
- 2.5 GHz typical small-signal bandwidth at 100 mVPP
- 850 MHz typical large-signal bandwidth at 2 VPP
- 2750 V/us slew rate for 2 V output step
- 0.17 ns typical rise and fall times
- 2.3 ns settling to 0.1% for 2 V step
- 3.3 V to 5.25 V total supply range
- 8-pin DSG WSON package, 2 mm x 2 mm
- Power-down mode with 70 uA typical quiescent current
Typical Applications
- Wideband signal-chain gain stages
- Low-noise analog front ends
- Fast pulse response circuits
- High-speed measurement paths
- Wideband 2 VPP output stages
- Power-down controlled amplifier channels
Procurement Notes
When requesting a quote for OPA855, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What minimum gain is required for OPA855 stability?
The OPA855 is a decompensated amplifier specified as stable for gains of 7 V/V or higher. The 8 GHz gain bandwidth product is listed under conditions that include G=7 V/V.
What package and bare die options are specified?
The device is listed in an 8-pin DSG WSON package measuring 2 mm x 2 mm. Bare die information gives a nominal die size of 0.751 mm x 0.705 mm and a 381 um thickness.
What supply range and temperature range does OPA855 support?
Recommended total supply voltage is 3.3 V minimum, 5 V nominal, and 5.25 V maximum. The recommended operating free-air temperature range is -40°C to +125°C.
How fast is the OPA855 step response?
For dynamic response, the datasheet facts list 0.17 ns typical rise time and 0.17 ns typical fall time for a 100 mV output step, plus 2.3 ns typical settling to 0.1% for a 2 V output step.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 13, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.