Specifications
| Type | Description |
|---|---|
| Part Number | INA148 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | D package, SOIC-8, 4.9 mm x 6 mm nominal |
| Common-mode input voltage range, VS = +5 V | +75 V |
| Common-mode input voltage range, VS = ±15 V | ±200 V |
| Differential gain, fixed gain | 1 V/V |
| Quiescent current, VIN = 0 V | 260 µA typ, 300 µA max |
| Single-supply voltage range, recommended operating conditions | 2.7 V min, 30 V typ, 36 V max |
| Dual-supply voltage range, recommended operating conditions | ±1.35 V min, ±15 V typ, ±18 V max |
| Specified temperature range, recommended operating conditions | -40°C to +85°C |
| Absolute maximum dual supply voltage, VS = (V+) - (V-) | ±18 V max |
| Absolute maximum single supply voltage, VS = (V+) - 0 V | 36 V max |
| Absolute maximum continuous signal input voltage, signal input pins | ±200 V |
| Absolute maximum peak signal input voltage, 0.1 s peak, signal input pins | ±500 V |
| Operating temperature absolute maximum range | -55°C to +125°C |
| Storage temperature range | -55°C to +125°C |
| Junction temperature | 150°C max |
| Lead temperature, soldering, 10 s | 300°C max |
| Junction-to-ambient thermal resistance, D package, SOIC-8 | 150°C/W |
| Offset voltage, RTI, VS = ±15 V, TA = 25°C | ±1 mV typ, ±5 mV max |
| Offset voltage, RTI, VS = ±5 V, TA = 25°C | ±1 mV typ, ±5 mV max |
| Offset voltage drift, RTI, TA = -40°C to +85°C | ±10 µV/°C |
| Power-supply rejection ratio, RTI, VS = ±1.35 V to ±18 V, CSO: SHE | ±50 µV/V typ, ±400 µV/V max |
| Power-supply rejection ratio, RTI, VS = ±1.35 V to ±18 V, CSO: TID | ±3.5 µV/V typ, ±80 µV/V max |
| Common-mode voltage, VS = ±15 V, VO = 0 V | -200 V min, +200 V max |
| Common-mode rejection ratio, VS = ±15 V, VCM = -200 V to +200 V, RS = 0 Ω | 70 dB min, 86 dB typ |
| Common-mode rejection ratio, VS = ±5 V, VCM = -100 V to +80 V, RS = 0 Ω | 70 dB min, 86 dB typ |
| Differential input impedance | 2 MΩ |
| Common-mode input impedance | 1 MΩ |
| Voltage noise, RTI, fB = 0.1 Hz to 10 Hz | 17 µVPP |
| Voltage noise density, RTI, f = 1 kHz | 880 nV/√Hz |
| Initial gain | 1 V/V |
| Gain error, VO = (V-) + 0.5 V to (V+) - 1.5 V | ±0.01% typ, ±0.075% max |
| Gain error drift, TA = -40°C to +85°C | ±3 ppm/°C typ, ±10 ppm/°C max |
| Gain nonlinearity, VS = ±15 V, VO = (V-) + 0.5 V to (V+) - 1.5 V | ±0.001% typ, ±0.002% max of FSR |
| Output voltage swing, RL = 100 kΩ | (V-) + 0.25 V min to (V+) - 1 V max |
| Output voltage swing, RL = 10 kΩ | (V-) + 0.5 V min to (V+) - 1.5 V max |
| Load capacitance for stable operation | 10 nF |
| Short-circuit current, continuous to VS / 2, CSO: SHE | ±13 mA |
| Short-circuit current, VS = +5 V, continuous to VS / 2, CSO: TID | ±20 mA |
| Bandwidth, -3 dB, CSO: SHE | 100 kHz |
| Bandwidth, -3 dB, CSO: TID | 155 kHz |
| Slew rate | 1 V/µs |
| Settling time to 0.1%, VS = ±15 V, VO = 10 V step, CSO: SHE | 21 µs |
| Settling time to 0.1%, VS = ±15 V, VO = 10 V step, CSO: TID | 15 µs |
| Settling time to 0.01%, VS = ±15 V, VO = 10 V step, CSO: SHE | 25 µs |
| Settling time to 0.01%, VS = ±15 V, VO = 10 V step, CSO: TID | 23 µs |
| Overload recovery time, 50% input overload, CSO: SHE | 4 µs |
| Overload recovery time, 50% input overload, CSO: TID | 1.2 µs |
| Input voltage divider ratio, precision laser-trimmed thin-film resistor network | 20:1 |
| Datasheet Status | request_only |
Product Overview
The INA148 is a Texas Instruments unity-gain difference amplifier for Signal_Chain designs that need fixed 1 V/V differential gain while rejecting large common-mode voltages. Its input structure uses a precision laser-trimmed thin-film resistor network with a 20:1 input voltage divider ratio. With ±15 V supplies, the common-mode voltage range is specified from -200 V to +200 V at VO = 0 V, and the common-mode rejection ratio is 70 dB minimum and 86 dB typical.
The device operates from either single or dual supplies. Recommended operation covers 2.7 V minimum to 36 V maximum single-supply operation, or ±1.35 V minimum to ±18 V maximum dual-supply operation. Quiescent current is 260 µA typical and 300 µA maximum with VIN = 0 V. The specified operating temperature range is -40°C to +85°C.
INA148 is supplied in the D package, SOIC-8, with 4.9 mm x 6 mm nominal dimensions and 150°C/W junction-to-ambient thermal resistance. Signal-chain use cases include differential measurement, high common-mode voltage sensing, level-shifted signal conditioning, and circuits requiring stable operation with load capacitance up to 10 nF.
Key Features
- Fixed 1 V/V differential gain
- ±200 V common-mode input range on ±15 V supplies
- +75 V common-mode input range on +5 V supply
- 260 µA typical quiescent current at VIN = 0 V
- 2.7 V to 36 V recommended single-supply operation
- ±1.35 V to ±18 V recommended dual-supply operation
- 70 dB minimum common-mode rejection ratio
- 100 kHz or 155 kHz -3 dB bandwidth by CSO option
- 1 V/µs slew rate
- Stable operation with 10 nF load capacitance
- SOIC-8 D package, 4.9 mm x 6 mm nominal
- 20:1 laser-trimmed thin-film input divider
Typical Applications
- High common-mode voltage measurement
- Differential signal conditioning
- Level-shifted signal measurement
- Unity-gain difference amplification
- Single-supply signal-chain circuits
- Dual-supply analog front ends
- High-impedance differential inputs
- SOIC-8 instrumentation assemblies
Procurement Notes
When requesting a quote for INA148, 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 amplifier is the INA148?
The INA148 is a Texas Instruments unity-gain difference amplifier for Signal_Chain use. It has fixed 1 V/V differential gain and uses a precision laser-trimmed thin-film resistor network with a 20:1 input voltage divider ratio.
What common-mode input range does INA148 support?
The common-mode input range is +75 V when operated from a +5 V supply. With ±15 V supplies, the common-mode input range is specified as ±200 V, and the common-mode voltage range is -200 V to +200 V at VO = 0 V.
What supply ranges are recommended for INA148?
Recommended single-supply operation spans 2.7 V minimum, 30 V typical, and 36 V maximum. Recommended dual-supply operation spans ±1.35 V minimum, ±15 V typical, and ±18 V maximum.
What package is used for the INA148?
INA148 is specified in the D package, SOIC-8, with 4.9 mm x 6 mm nominal dimensions. The listed junction-to-ambient thermal resistance for the D package is 150°C/W.
What are the main dynamic specifications of INA148?
The device has a 1 V/µs slew rate. The -3 dB bandwidth is 100 kHz for CSO: SHE and 155 kHz for CSO: TID. Settling time to 0.1% is 21 µs for SHE and 15 µs for TID.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 8, 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.