Specifications
| Type | Description |
|---|---|
| Part Number | OPA2145 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | SOIC-8 4.90 mm x 3.91 mm; VSSOP-8 3.00 mm x 3.00 mm |
| Amplifier channels | 2; condition: OPA2145 dual device |
| Gain-bandwidth product | 5.5 MHz; condition: feature summary |
| Slew rate | 20 V/us; condition: feature summary |
| Supply current | 475 uA max; condition: feature summary |
| Offset voltage | ±40 uV typ, ±150 uV max; condition: VS=±18 V, TA=25°C, RTI |
| Offset voltage | ±280 uV max; condition: VS=±18 V, TA=0°C to +85°C, RTI |
| Offset voltage | ±350 uV max; condition: VS=±18 V, TA=-40°C to +125°C, RTI |
| Offset voltage drift | ±0.15 uV/°C typ, ±0.8 uV/°C max; condition: VS=±18 V, TA=0°C to +85°C, OPA2145 |
| Offset voltage drift | ±0.2 uV/°C typ, ±1 uV/°C max; condition: VS=±18 V, TA=-40°C to +125°C, OPA2145 |
| Power-supply rejection ratio | ±0.06 uV/V typ, ±0.3 uV/V max; condition: VS=±2.25 V to ±18 V, OPA2145 packages |
| Power-supply rejection ratio | ±0.65 uV/V max; condition: VS=±2.25 V to ±18 V, TA=-40°C to +125°C, OPA2145 |
| Input bias current | ±2 pA typ, ±10 pA max; condition: TA=25°C |
| Input bias current | ±600 pA max; condition: TA=0°C to +85°C |
| Input bias current | ±10 nA max; condition: TA=-40°C to +125°C |
| Input offset current | ±2 pA typ, ±10 pA max; condition: TA=25°C |
| Input offset current | ±600 pA max; condition: TA=0°C to +85°C |
| Input offset current | ±10 nA max; condition: TA=-40°C to +125°C |
| Input voltage noise | 320 nVPP; condition: f=0.1 Hz to 10 Hz |
| Input voltage noise | 60 nVRMS; condition: f=0.1 Hz to 10 Hz |
| Input voltage noise density | 9 nV/sqrt(Hz); condition: f=10 Hz |
| Input voltage noise density | 7.2 nV/sqrt(Hz); condition: f=100 Hz |
| Input voltage noise density | 7 nV/sqrt(Hz); condition: f=1 kHz |
| Input current noise density | 0.8 fA/sqrt(Hz); condition: f=1 kHz |
| Common-mode voltage range | (V-) - 0.1 V to (V+) - 3.5 V; condition: TA=-40°C to +125°C |
| Common-mode rejection ratio | 126 dB min, 140 dB typ; condition: VS=±18 V, VCM=(V-) - 0.1 V to (V+) - 3.5 V |
| Common-mode rejection ratio | 118 dB min; condition: VS=±18 V, VCM=(V-) - 0.1 V to (V+) - 3.5 V, TA=-40°C to +125°C |
| Differential input impedance | 10^13 ohm || 5 pF; condition: electrical characteristics |
| Common-mode input impedance | 10^13 ohm || 4.3 pF; condition: VCM=(V-) - 0.1 V to (V+) - 3.5 V |
| Open-loop voltage gain | 114 dB min, 123 dB typ; condition: VO=(V-) + 0.35 V to (V+) - 0.35 V, RL=10 kohm, OPA2145 |
| Open-loop voltage gain | 106 dB min, 110 dB typ; condition: VO=(V-) + 0.35 V to (V+) - 0.35 V, RL=2 kohm |
| Recommended single supply voltage | 4.5 V min, 30 V nom, 36 V max; condition: recommended operating conditions |
| Recommended dual supply voltage | ±2.25 V min, ±15 V nom, ±18 V max; condition: recommended operating conditions |
| Recommended ambient temperature | -40°C min, 25°C nom, 125°C max; condition: recommended operating conditions |
| Absolute maximum single supply voltage | 40 V max; condition: absolute maximum ratings |
| Absolute maximum dual supply voltage | ±20 V max; condition: absolute maximum ratings |
| Signal input pin voltage | (V-) - 0.5 V to (V+) + 0.5 V; condition: absolute maximum ratings |
| Signal input pin current | ±10 mA max; condition: absolute maximum ratings |
| Output short-circuit current | continuous; condition: short-circuit to VS/2, one amplifier per package |
| Absolute maximum operating temperature | -55°C to 150°C; condition: absolute maximum ratings, TA |
| Junction temperature | 150°C max; condition: absolute maximum ratings |
| Storage temperature | -65°C to 150°C; condition: absolute maximum ratings |
| ESD rating HBM | ±2000 V; condition: ANSI/ESDA/JEDEC JS-001 |
| ESD rating CDM | ±1000 V; condition: JEDEC JESD22-C101 |
| Thermal resistance junction-to-ambient | 118.7°C/W; condition: OPA2145 D SOIC-8 package |
| Thermal resistance junction-to-ambient | 163.9°C/W; condition: OPA2145 DGK VSSOP-8 package |
| Thermal resistance junction-to-case top | 52.3°C/W; condition: OPA2145 D SOIC-8 package |
| Thermal resistance junction-to-case top | 53.4°C/W; condition: OPA2145 DGK VSSOP-8 package |
| Thermal resistance junction-to-board | 63.5°C/W; condition: OPA2145 D SOIC-8 package |
| Thermal resistance junction-to-board | 85.0°C/W; condition: OPA2145 DGK VSSOP-8 package |
| Junction-to-top characterization parameter | 10.7°C/W; condition: OPA2145 D SOIC-8 package |
| Junction-to-top characterization parameter | 5.9°C/W; condition: OPA2145 DGK VSSOP-8 package |
| Junction-to-board characterization parameter | 62.4°C/W; condition: OPA2145 D SOIC-8 package |
| Junction-to-board characterization parameter | 83.7°C/W; condition: OPA2145 DGK VSSOP-8 package |
| Datasheet Status | request_only |
Product Overview
The OPA2145 is a Texas Instruments dual precision JFET operational amplifier in the Signal Chain category. The OPA2145 dual device integrates 2 amplifier channels and is specified with a 5.5 MHz gain-bandwidth product, 20 V/us slew rate, and 475 uA maximum supply current from the feature summary.
Precision input behavior is defined by ±40 uV typical and ±150 uV maximum offset voltage at VS=±18 V and TA=25°C, with offset limits across 0°C to +85°C and -40°C to +125°C. The device also specifies low input bias and input offset currents, 10^13 ohm input impedance terms, and input voltage noise densities down to 7 nV/sqrt(Hz) at 1 kHz.
Packaging options include SOIC-8 at 4.90 mm x 3.91 mm and VSSOP-8 at 3.00 mm x 3.00 mm. Recommended operation covers 4.5 V to 36 V single supply, ±2.25 V to ±18 V dual supply, and -40°C to 125°C ambient temperature. These specifications support precision signal-chain amplification where dual channels, JFET inputs, low bias current, and defined thermal ratings are design constraints.
Key Features
- Dual precision JFET operational amplifier with 2 channels
- 5.5 MHz gain-bandwidth product
- 20 V/us slew rate
- 475 uA maximum supply current
- ±40 uV typical offset voltage at VS=±18 V
- ±2 pA typical input bias current at 25°C
- 7 nV/sqrt(Hz) voltage noise density at 1 kHz
- Common-mode range extends to (V-) - 0.1 V
- 126 dB minimum CMRR at VS=±18 V
- Single-supply operation recommended from 4.5 V to 36 V
Typical Applications
- Dual-channel precision signal amplification
- High-impedance signal input stages
- Low-bias-current analog front ends
- Low-current signal-chain amplifier stages
- Single-supply precision amplifier circuits
- Dual-supply precision amplifier circuits
Procurement Notes
When requesting a quote for OPA2145, 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
How many amplifier channels does the OPA2145 include?
The OPA2145 is specified as a dual device with 2 amplifier channels. The product type is a dual precision JFET operational amplifier from Texas Instruments in the Signal_Chain category.
What supply voltage range is recommended for OPA2145 operation?
Recommended operation is 4.5 V minimum to 36 V maximum for single-supply use, with 30 V nominal. For dual supplies, the recommended range is ±2.25 V minimum to ±18 V maximum, with ±15 V nominal.
What packages are listed for the OPA2145?
The listed package options are SOIC-8 measuring 4.90 mm x 3.91 mm and VSSOP-8 measuring 3.00 mm x 3.00 mm. Thermal resistance values are specified separately for the OPA2145 D SOIC-8 and DGK VSSOP-8 packages.
What are the main dynamic specifications of the OPA2145?
The feature summary specifies a 5.5 MHz gain-bandwidth product and a 20 V/us slew rate. Input voltage noise density is specified as 9 nV/sqrt(Hz) at 10 Hz, 7.2 nV/sqrt(Hz) at 100 Hz, and 7 nV/sqrt(Hz) at 1 kHz.
What is the input voltage noise density of the OPA2145?
The OPA2145 specifies 7 nV/sqrt(Hz) input voltage noise density at 1 kHz, supporting low-noise precision signal-chain applications.
What temperature range does the OPA2145 support?
The OPA2145 is specified for operation from -40°C to +125°C ambient temperature, making it suitable for industrial environments.
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.