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Texas Instruments INA148UA/2K5G4
- Part No.:
- INA148UA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA148UA/2K5G4.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,456
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Product details
Overview
INA148UA/2K5G4 from Texas Instruments is a precision unity-gain difference amplifier optimized for high common-mode voltage measurement in battery monitoring, DC fast charging, and industrial analog input modules. It delivers ±200V common-mode input range at ±15V supplies, 0.075% max gain error, 86dB CMRR, and 260μA quiescent current in an SOIC-8 package.
For engineers reviewing the INA148UA/2K5G4 datasheet, INA148UA/2K5G4 pinout, INA148UA/2K5G4 application, or INA148UA/2K5G4 equivalent, key selection criteria include verified ±200V CMV capability at ±15V supply, laser-trimmed 1V/V gain accuracy over temperature, low-power operation down to 2.7V single supply, and SOIC-8 compatibility with industrial −40°C to +85°C operation.
Technical Context
The INA148UA/2K5G4 integrates a monolithic bipolar op amp with a laser-trimmed thin-film resistor network featuring a 20:1 input voltage divider and internal 20V/V feedback gain to achieve precise unity differential gain. Its architecture enables direct measurement of high-voltage differential signals while rejecting common-mode noise up to ±200V.
Operation supports single (2.7V–36V) or dual (±1.35V–±18V) supplies, with reference pin (Pin 1) enabling output offset summation and common-mode range adjustment. Input impedance is ~1MΩ per terminal, requiring matched source impedances to preserve 86dB CMRR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Common-mode voltage | ±200V at ±15V supply - enables direct cell-string voltage sensing in 400V+ battery packs without external level-shifting. |
| Differential gain | 1V/V fixed - eliminates gain calibration in shunt-based current measurement circuits. |
| Gain error | ±0.075% max - ensures <±750ppm absolute accuracy in precision voltage monitoring applications. |
| CMRR | 86dB min - rejects >20,000:1 common-mode interference in noisy industrial power systems. |
| Quiescent current | 260μA typical - supports always-on monitoring in energy-constrained BMS and IoT edge nodes. |
| Supply range | Single: 2.7V–36V; Dual: ±1.35V–±18V - interoperable across legacy 5V, modern 3.3V, and high-voltage industrial rails. |
| Bandwidth | 100kHz (SHE) / 155kHz (TID) - sufficient for DC–10kHz battery voltage/current transients and power module control loops. |
| Input offset drift | ±10μV/°C - maintains <±1mV total offset shift across −40°C to +85°C industrial temperature range. |
Pinout & Package
INA148UA/2K5G4 is housed in an industry-standard SOIC-8 (D) surface-mount package measuring 4.9mm × 6mm, qualified for −40°C to +85°C operation and RoHS-compliant with NiPdAu lead finish and MSL Level-3 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: Ref | Reference input | DC offset summation node; sets output common-mode level and influences input CMV range - requires ≤5Ω source impedance to maintain 86dB CMRR. |
| Pin 2: –IN | Negative input | Inverting input terminal of internal op amp; part of 20:1 laser-trimmed resistor network for high-CMV attenuation. |
| Pin 3: +IN | Positive input | Non-inverting input terminal; matched to –IN for CMR preservation - source impedance must equal –IN's to avoid CMRR degradation. |
| Pin 4: V− | Negative supply | Ground or negative rail connection; supports single-supply (GND) or dual-supply (−VS) configurations. |
| Pin 5, 8: NC | No connect | Unbonded die pads - must remain unconnected on PCB to prevent parasitic coupling or latch-up. |
| Pin 6: Out | Output | Unity-gain buffered differential output; drives 10kΩ loads with (V−)+0.5V to (V+)-1.5V swing. |
| Pin 7: V+ | Positive supply | Positive rail connection; accepts up to +36V (single) or +18V (dual) - powers internal op amp and resistor network. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed resistor network | Enables 1V/V gain accuracy (±0.075%) and 86dB CMRR without external calibration components. |
| 20:1 input voltage divider | Attenuates ±200V common-mode inputs to safe levels for internal op amp, enabling direct high-voltage sensing. |
| Low quiescent current | 260μA operation allows continuous monitoring in battery-powered BMS and portable test equipment. |
| Reference pin (Ref) | Permits programmable output offset and common-mode level shifting - critical for interfacing with ADCs or microcontrollers. |
| Matched input impedance | ~1MΩ per input with tight resistor matching preserves CMRR even with moderate source impedance imbalances. |
| Wide supply flexibility | Operates from 2.7V single supply to ±18V dual supply - simplifies design reuse across 3.3V, 5V, and industrial HV systems. |
Applications
| Battery Cell Monitoring | DC Fast Charging Module |
|---|---|
|
Use Scenario: Real-time voltage measurement across individual Li-ion cells in series-connected EV battery packs operating up to 800V total stack voltage. IC Role / Device Role / Timing Role: High-CMV difference amplifier conditioning cell voltage for isolation-capable ADCs or microcontroller inputs. Use Value: Enables ±200V common-mode rejection at ±15V supply - eliminates need for discrete attenuators or isolated amplifiers in multi-cell string monitoring. |
Use Scenario: Current sensing across shunt resistors in 400V–1000V DC fast charging power stages during high-current (≥250A) charge cycles. IC Role / Device Role / Timing Role: Precision unity-gain differential amplifier converting shunt voltage to ground-referenced signal for controller feedback. Use Value: Maintains 0.002% nonlinearity and 86dB CMRR under transient load conditions - ensures accurate current regulation and thermal safety compliance. |
| Analog Input Module | String Inverter Monitoring |
|
Use Scenario: Signal conditioning for universal analog input channels in PLCs and industrial I/O modules accepting ±10V, 4–20mA, or mV-level sensor outputs. IC Role / Device Role / Timing Role: Programmable-gain front-end amplifier with reference-adjustable output common-mode for ADC interface alignment. Use Value: Reference pin (Pin 1) allows dynamic output level shifting to match ADC input range - reduces system-level calibration overhead. |
Use Scenario: Voltage and current monitoring of photovoltaic string outputs in utility-scale solar inverters with 1500V DC-rated arrays. IC Role / Device Role / Timing Role: High-voltage differential amplifier isolating PV string measurements from inverter control logic and gate drivers. Use Value: SOIC-8 package and −40°C to +85°C rating support rugged outdoor deployment - no derating required at full ±200V CMV. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA149UA/2K5 | Higher CMRR (100dB), wider bandwidth (200kHz), but higher IQ (450μA); same SOIC-8 package and ±200V CMV rating. | Better suited for high-speed, ultra-low-noise applications like precision test equipment where CMRR >90dB is mandatory. | Select INA149UA/2K5 when CMRR margin >14dB is required and quiescent current budget permits +73% increase. |
| AD8479ARZ | Wider CMV range (±600V), lower gain error (±0.01%), but larger SOIC-16 package and higher cost; no Ref pin for output offset control. | Targeted at ultra-high-voltage applications such as grid-tie inverters or HV motor drives where >±200V CMV is essential. | Choose AD8479ARZ only if ±600V CMV is required and board space allows SOIC-16; otherwise INA148UA/2K5G4 offers better cost/performance balance. |
Compared with INA149UA/2K5, the INA148UA/2K5G4 trades 14dB CMRR and 100kHz bandwidth for 42% lower quiescent current and identical SOIC-8 footprint; versus AD8479ARZ, it sacrifices ±600V CMV and 0.01% gain error for smaller size, lower cost, and integrated reference flexibility.
Availability
INA148UA/2K5G4 is available at Aetrix Electronics and suitable for battery management systems, DC fast charging power modules, and industrial analog input modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for INA148UA/2K5G4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision amplifiers and signal-conditioning ICs.
The INA148 product line was designed specifically for high-common-mode-voltage measurement in energy infrastructure - targeting battery formation/test, EV charging, and renewable power conversion systems where accuracy, reliability, and wide supply flexibility are critical.
FAQ
What is the maximum common-mode voltage supported by the INA148UA/2K5G4?
The INA148UA/2K5G4 supports ±200V common-mode voltage when operated with ±15V dual supplies. At ±5V supplies, the rating is ±100V; with +5V single supply and VREF = VS/2, it operates from –47.5V to +32.5V. These limits are absolute maximums defined in the datasheet and must not be exceeded to ensure reliable operation of the INA148UA/2K5G4.
Does the INA148UA/2K5G4 require external gain-setting resistors?
No, the INA148UA/2K5G4 features an on-chip laser-trimmed thin-film resistor network that fixes the differential gain at precisely 1V/V. No external resistors are needed for gain configuration, eliminating component count, layout sensitivity, and temperature drift associated with discrete resistor networks in the INA148UA/2K5G4 design.
Can the INA148UA/2K5G4 operate from a single 3.3V supply?
Yes, the INA148UA/2K5G4 supports single-supply operation from 2.7V to 36V. At 3.3V, it maintains functional performance with reduced common-mode input range (approximately –1.3V to +2.3V depending on VREF), making it suitable for low-voltage industrial sensors and portable instrumentation where the INA148UA/2K5G4's 260μA quiescent current is advantageous.
How does the Ref pin (Pin 1) affect the INA148UA/2K5G4's common-mode range?
The Ref pin directly sums voltage into the output and shifts the allowable input common-mode voltage window. For example, with ±15V supplies and VREF = 0V, the input range is ±200V; raising VREF to +5V reduces the positive CMV limit and expands the negative limit. This behavior is documented in Section 6.1.3 of the INA148UA/2K5G4 datasheet and must be accounted for in system-level biasing.
Is the INA148UA/2K5G4 pin-compatible with other Texas Instruments difference amplifiers?
The INA148UA/2K5G4 uses an SOIC-8 (D) package with a unique pinout including dedicated Ref, –IN, +IN, and NC pins. It is not pin-compatible with INA133, INA149, or INA163 due to differing pin functions and internal architectures. Board redesign is required when substituting the INA148UA/2K5G4 into existing layouts of those devices.
INA148UA/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 100 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 260µA
- Current - Output / Channel:
- 13 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
INA148UA/2K5G4 FAQ
1.How can I place an order for INA148UA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA148UA/2K5G4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for INA148UA/2K5G4 reliable?
The price and inventory of INA148UA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA148UA/2K5G4 is usually 5 days.
3.What payment methods are accepted for INA148UA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA148UA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA148UA/2K5G4?
INA148UA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA148UA/2K5G4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for INA148UA/2K5G4?
For technical support, including INA148UA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA148UA/2K5G4 requirements.
6.How does Aetrix verify that INA148UA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All INA148UA/2K5G4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that INA148UA/2K5G4 meets industry standards.
7.What is the process for return or replacement of INA148UA/2K5G4?
All INA148UA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with INA148UA/2K5G4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The INA148UA/2K5G4 part is unused and in its original packaging.
Return procedure for INA148UA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA148UA/2K5G4 Tags
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