Specifications
| Type | Description |
|---|---|
| Part Number | OPA145 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Component Type | Other |
| Package Case | OPA145: SOIC-8 4.90 mm x 3.91 mm, VSSOP-8 3.00 mm x 3.00 mm, SOT-23-5 2.90 mm x 1.60 mm; OPA2145: SOIC-8 4.90 mm x 3.91 mm, VSSOP-8 3.00 mm x 3.00 mm |
| Gain-bandwidth product | 5.5 MHz; Feature summary; source page 1 |
| Slew rate | 20 V/us; Feature summary; source page 1 |
| Supply current | 475 uA max; Feature summary; source page 1 |
| Offset voltage | 150 uV max; Feature summary; source page 1 |
| Offset voltage drift | 1 uV/degC max; Feature summary; source page 1 |
| Input bias current | 2 pA; Feature summary; source page 1 |
| Input voltage noise density | 7 nV/sqrt(Hz); Feature summary; source page 1 |
| Input current noise density | 0.8 fA/sqrt(Hz); Feature summary; source page 1 |
| Input voltage range | Includes V- supply; Feature summary; source page 1 |
| Single-supply operating range | 4.5 V to 36 V; Feature summary and recommended operating conditions; source page 1 |
| Dual-supply operating range | +/-2.25 V to +/-18 V; Feature summary and recommended operating conditions; source page 1 |
| Absolute maximum dual supply voltage | +/-20 V; Over operating free-air temperature range; source page 4 |
| Absolute maximum single supply voltage | 40 V; Over operating free-air temperature range; source page 4 |
| Signal input pin voltage | (V-) - 0.5 V min, (V+) + 0.5 V max; Absolute maximum ratings; source page 4 |
| Signal input pin current | +/-10 mA; Absolute maximum ratings; input pins diode-clamped to supply rails; source page 4 |
| Output short-circuit current | Continuous; Short-circuit to VS/2, one amplifier per package; source page 4 |
| Operating temperature absolute maximum | -55 degC to 150 degC; Absolute maximum ratings; source page 4 |
| Junction temperature | 150 degC max; Absolute maximum ratings; source page 4 |
| Storage temperature | -65 degC to 150 degC; Absolute maximum ratings; source page 4 |
| ESD rating HBM | +/-2000 V; Human-body model, per ANSI/ESDA/JEDEC JS-001; source page 4 |
| ESD rating CDM | +/-1000 V; Charged-device model, per JEDEC JESD22-C101; source page 4 |
| Recommended ambient temperature | -40 degC min, 25 degC nom, 125 degC max; Recommended operating conditions; source page 4 |
| OPA145 SOIC-8 junction-to-ambient thermal resistance | 136 degC/W; D package, 8 pins; source page 5 |
| OPA145 VSSOP-8 junction-to-ambient thermal resistance | 143 degC/W; DGK package, 8 pins; source page 5 |
| OPA145 SOT-23-5 junction-to-ambient thermal resistance | 205 degC/W; DBV package, 5 pins; source page 5 |
| OPA2145 SOIC-8 junction-to-ambient thermal resistance | 118.7 degC/W; D package, 8 pins; source page 5 |
| OPA2145 VSSOP-8 junction-to-ambient thermal resistance | 163.9 degC/W; DGK package, 8 pins; source page 5 |
| Offset voltage RTI | +/-40 uV typ, +/-150 uV max; VS = +/-18 V, TA = 25 degC; source page 6 |
| Offset voltage RTI over temperature | +/-280 uV max; VS = +/-18 V, TA = 0 degC to +85 degC; source page 6 |
| Offset voltage RTI over full temperature | +/-350 uV max; VS = +/-18 V, TA = -40 degC to +125 degC; source page 6 |
| Power-supply rejection ratio | +/-0.06 uV/V typ, +/-0.3 uV/V max; VS = +/-2.25 V to +/-18 V, OPA145ID and OPA2145 packages; source page 6 |
| Input bias current 25C | +/-2 pA typ, +/-10 pA max; TA = 25 degC; source page 6 |
| Input bias current 85C | +/-600 pA max; TA = 0 degC to +85 degC; source page 6 |
| Input bias current 125C | +/-10 nA max; TA = -40 degC to +125 degC; source page 6 |
| Input offset current | +/-2 pA typ, +/-10 pA max; TA = 25 degC; source page 6 |
| Input voltage noise | 320 nVPP; f = 0.1 Hz to 10 Hz; source page 6 |
| Input voltage noise RMS | 60 nVRMS; f = 0.1 Hz to 10 Hz; source page 6 |
| Input voltage noise density 10Hz | 9 nV/sqrt(Hz); f = 10 Hz; source page 6 |
| Input voltage noise density 100Hz | 7.2 nV/sqrt(Hz); f = 100 Hz; source page 6 |
| Input voltage noise density 1kHz | 7 nV/sqrt(Hz); f = 1 kHz; source page 6 |
| Input current noise density | 0.8 fA/sqrt(Hz); f = 1 kHz; source page 6 |
| Common-mode voltage range | (V-) - 0.1 V min, (V+) - 3.5 V max; TA = -40 degC to +125 degC; source page 6 |
| Common-mode rejection ratio | 126 dB min, 140 dB typ; VS = +/-18 V, VCM = (V-) - 0.1 V to (V+) - 3.5 V; source page 6 |
| Differential input impedance | 10^13 ohm || 5 pF; Electrical characteristics; source page 6 |
| Common-mode input impedance | 10^13 ohm || 4.3 pF; VCM = (V-) - 0.1 V to (V+) - 3.5 V; source page 6 |
| Open-loop voltage gain 10kohm | 118 dB min (OPA145ID), 110 dB min (OPA145IDGK/IDBV), 114 dB min (OPA2145); source page 7 |
| Open-loop voltage gain 2kohm | 106 dB min, 110 dB typ; VO = (V-) + 0.35 V to (V+) - 0.35 V, RL = 2 kohm; source page 7 |
| Datasheet Status | request_only |
Product Overview
The OPA145 is a Texas Instruments JFET operational amplifier in the Signal Chain category. Datasheet feature data lists a 5.5 MHz gain-bandwidth product, 20 V/us slew rate, 475 uA maximum supply current, 150 uV maximum offset voltage, and 1 uV/degC maximum offset voltage drift. Input characteristics include 2 pA input bias current, 7 nV/sqrt(Hz) input voltage noise density, and 0.8 fA/sqrt(Hz) input current noise density.
Supply operation spans 4.5 V to 36 V for single-supply use and +/-2.25 V to +/-18 V for dual-supply use. Absolute maximum ratings include 40 V single supply, +/-20 V dual supply, signal input pin voltage from (V-) - 0.5 V to (V+) + 0.5 V, and +/-10 mA signal input pin current with diode-clamped input pins.
Package information covers OPA145 in SOIC-8, VSSOP-8, and SOT-23-5 formats, plus OPA2145 in SOIC-8 and VSSOP-8. Thermal resistance data ranges from 118.7 degC/W for OPA2145 SOIC-8 to 205 degC/W for OPA145 SOT-23-5. These electrical and package parameters fit precision signal conditioning, low-bias sensor interfaces, and low-noise operational amplifier stages.
Key Features
- 5.5 MHz gain-bandwidth product
- 20 V/us slew rate
- 475 uA maximum supply current
- 150 uV maximum offset voltage
- 1 uV/degC maximum offset voltage drift
- 2 pA input bias current
- 7 nV/sqrt(Hz) input voltage noise density
- 0.8 fA/sqrt(Hz) input current noise density
- Input voltage range includes the V- supply
- 4.5 V to 36 V single-supply operating range
- +/-2.25 V to +/-18 V dual-supply operating range
- SOIC-8, VSSOP-8, and SOT-23-5 package options
Typical Applications
- Precision signal conditioning
- Low-bias sensor interfaces
- Low-noise amplifier stages
- Single-supply op amp circuits
- Dual-supply op amp circuits
- High-impedance input buffering
- JFET input amplifier designs
Procurement Notes
When requesting a quote for OPA145, 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 type of device is the OPA145?
The OPA145 is a Texas Instruments JFET operational amplifier in the Signal Chain category. Extracted datasheet facts list package options, gain-bandwidth product, slew rate, supply ranges, input bias current, noise density, offset voltage, and temperature-related ratings.
What supply ranges are specified for OPA145 operation?
The extracted facts specify a 4.5 V to 36 V single-supply operating range and a +/-2.25 V to +/-18 V dual-supply operating range. Absolute maximum ratings list 40 V single supply and +/-20 V dual supply.
What package options are listed for the OPA145?
OPA145 package data lists SOIC-8 at 4.90 mm x 3.91 mm, VSSOP-8 at 3.00 mm x 3.00 mm, and SOT-23-5 at 2.90 mm x 1.60 mm. Related OPA2145 package data lists SOIC-8 and VSSOP-8.
What noise parameters are provided for the OPA145?
The extracted facts include 320 nVPP input voltage noise from 0.1 Hz to 10 Hz, 60 nVRMS over the same band, 9 nV/sqrt(Hz) at 10 Hz, 7.2 nV/sqrt(Hz) at 100 Hz, and 7 nV/sqrt(Hz) at 1 kHz.
What input bias current values are specified?
Feature data lists 2 pA input bias current. Electrical characteristics list +/-2 pA typical and +/-10 pA maximum at 25 degC, with maximum values of +/-600 pA from 0 degC to +85 degC and +/-10 nA from -40 degC to +125 degC.
Does the OPA145 support single-supply operation?
Yes, the OPA145 supports 4.5 V to 36 V single-supply operation as well as +/-2.25 V to +/-18 V dual-supply operation, and its input range extends to the V- supply rail.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 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.