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Texas Instruments INA154UA/2K5
- Part No.:
- INA154UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA154UA/2K5.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,551
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Product details
Overview
INA154UA/2K5 from Texas Instruments (formerly Burr-Brown) is a high-speed, precision unity-gain difference amplifier optimized for differential signal conditioning in industrial measurement systems. It delivers ±750µV max offset voltage, 3MHz bandwidth, 14V/µs slew rate, and operates from ±4V to ±18V supplies - enabling accurate current sensing, instrumentation amplifier front-ends, and voltage-controlled current sources.
For engineers reviewing the INA154UA/2K5 datasheet, INA154UA/2K5 pinout, INA154UA/2K5 application, or INA154UA/2K5 equivalent, key selection criteria include guaranteed CMRR >74dB over –25V to +25V common-mode range, laser-trimmed 25kΩ resistor network for gain accuracy, SO-8 package thermal resistance (ΘJA = 150°C/W), and extended industrial temperature operation (–40°C to +85°C).
Technical Context
The INA154UA/2K5 integrates a precision op amp with a monolithic, laser-trimmed 4-resistor network (25kΩ each, ratio-matched) to achieve exact G = 1 differential gain and high common-mode rejection. Its input stage supports rail-to-rail common-mode voltage range extending beyond supply rails (2·V+ – 5V to 2·V– + 5V), enabling direct measurement of signals above or below V+/V–.
Output is referenced to the dedicated Ref pin (Pin 1), allowing external DC offset summation without degrading CMRR. Input bias currents are nulled via internal architecture, and the device maintains ±0.05% max gain error and ±2µV/°C offset drift across temperature - critical for stable long-term measurements in data acquisition and sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Accuracy | ±0.05% max initial error - ensures minimal scaling deviation in precision measurement paths |
| Offset Voltage | ±750µV max at +25°C - enables sub-millivolt differential signal resolution |
| CMRR | 74dB min (VCM = –25V to +25V) - rejects noise and interference in noisy industrial environments |
| Bandwidth | 3MHz (–3dB) - supports fast transient capture in motor control feedback and power monitoring |
| Slew Rate | 14V/µs - preserves fidelity of high-slew input signals without distortion |
| Supply Range | ±4V to ±18V - compatible with standard industrial dual-rail supplies and legacy ±15V systems |
| Quiescent Current | ±2.4mA - balances performance and power efficiency in always-on instrumentation |
Pinout & Package
INA154UA/2K5 is housed in an SO-8 surface-mount package (JEDEC MS-012, TI drawing D) with ΘJA = 150°C/W and RoHS-compliant lead finish. Pin 1 orientation follows Q1 quadrant assignment per tape-and-reel packaging standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Ref) | Output Reference | DC offset summation node; output = V+In – V–In + VRef; source impedance <10Ω required for CMRR preservation |
| 2 (–In) | Inverting Input | Differential input terminal; matched 25kΩ laser-trimmed resistor to Ref node |
| 3 (+In) | Non-inverting Input | Differential input terminal; matched 25kΩ laser-trimmed resistor to Ref node |
| 4 (V–) | Negative Supply | Connects to negative rail; supports operation down to ±4V total supply |
| 5 (NC) | No Internal Connection | Unbonded pad; must remain unconnected to avoid parasitic coupling |
| 6 (Output) | Differential Output | Single-ended output referenced to Ref pin; drives loads up to ±60mA |
| 7 (V+) | Positive Supply | Connects to positive rail; supports operation up to ±18V total supply |
| 8 (Sense) | Output Sense | Internal Kelvin sense for output stage; not user-accessible; no external connection |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed resistor network | 25kΩ ×4 monolithic array with ratio matching <0.01%, ensuring G = 1 accuracy without external components |
| Rail-enhanced common-mode range | Input common-mode extends to 2·V+ – 5V / 2·V– + 5V - measures signals beyond supply rails in isolated current sensing |
| Low TC resistor tracking | Matched TCR maintains CMRR >80dB over –40°C to +85°C - eliminates calibration drift in field-deployed equipment |
| Fast settling & low distortion | 3µs to 0.01% with 10V step and 100pF load; THD+Noise <0.001% at 1kHz - preserves signal integrity in precision ADC front-ends |
| Reference-referred output architecture | Output referenced to dedicated Ref pin (Pin 1) - enables programmable DC offset injection without loading the signal path |
Applications
| Current Sensing in Motor Drives | Precision Instrumentation Amplifier Front-End |
|---|---|
Use Scenario: Measuring bidirectional phase current in 3-phase inverter legs using shunt resistors placed between motor and ground. IC Role / Device Role / Timing Role: Difference amplifier configured as differential current receiver, rejecting common-mode switching noise while amplifying mV-level shunt voltage. Use Value: ±750µV offset enables accurate zero-current detection; 3MHz bandwidth captures PWM-edge transients without aliasing. | Use Scenario: Building a 3-op-amp instrumentation amplifier with programmable gain and ultra-low drift. IC Role / Device Role / Timing Role: Precision G = 1 difference amplifier serving as the output stage, accepting buffered differential inputs from two matched op amps. Use Value: Laser-trimmed resistors eliminate gain-setting resistor matching errors; CMRR >74dB suppresses residual common-mode error from front-end stages. |
| Voltage-Controlled Current Source (4–20mA) | Synchronous Demodulator in Sensor Signal Chains |
Use Scenario: Converting 0–10V process control signals into industry-standard 4–20mA loop-powered outputs. IC Role / Device Role / Timing Role: Difference amplifier used in precision voltage-to-current conversion topology with buffered differential inputs and gain-stabilized feedback. Use Value: ±2µV/°C offset drift ensures long-term loop accuracy; ±0.05% gain error meets Class A transmitter specifications per IEC 61298-2. | Use Scenario: Recovering low-level AC-coupled sensor signals (e.g., strain gauge, RTD bridge) modulated onto carrier frequencies. IC Role / Device Role / Timing Role: Unity-gain inverting amplifier and differential summing node in synchronous demodulation path, rejecting even-order harmonics and supply ripple. Use Value: High PSRR (>100dB at DC) and CMRR suppress carrier feedthrough; 14V/µs slew rate handles fast carrier zero-crossings without slewing distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA149IDR | G = 1 fixed, but higher CMRR (100dB min), lower offset (±100µV), wider supply (±2.5V to ±18V), SO-8 package | Better suited for ultra-high-precision DC-coupled measurements where offset drift and CMRR dominate | Select INA149IDR when <±100µV offset and >90dB CMRR over temperature are mandatory; INA154UA/2K5 remains optimal for cost-sensitive industrial designs requiring proven 3MHz bandwidth and robustness |
| AD8271ARMZ | G = 1 fixed, 10MHz bandwidth, ±150µV offset, ±0.02% gain error, but narrower supply (±5V to ±15V), MSOP-8 package | Preferred for high-speed data acquisition where bandwidth >5MHz is required and supply headroom is limited | Choose AD8271ARMZ for applications needing >5MHz small-signal response; INA154UA/2K5 offers superior thermal stability and wider supply flexibility for legacy ±15V systems. |
Compared with INA149IDR and AD8271ARMZ, the INA154UA/2K5 provides the best balance of industrial-grade temperature stability (–40°C to +85°C), wide dual-supply operation (±4V to ±18V), and proven 3MHz bandwidth at lower unit cost - making it ideal for motor control, PLC analog I/O, and industrial sensor signal conditioning where long-term reliability outweighs marginal parameter improvements.
Availability
INA154UA/2K5 is available at Aetrix Electronics and suitable for industrial motor control, programmable logic controller (PLC) analog input modules, and 4–20mA transmitter designs requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for INA154UA/2K5 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 (TI) is a global semiconductor leader delivering analog and embedded processing solutions, with deep heritage in precision signal chain components dating to Burr-Brown's 1980s instrumentation amplifier innovations.
The INA154 product line was designed specifically for high-accuracy differential signal conditioning in harsh industrial environments - emphasizing laser-trimmed gain accuracy, rail-enhanced common-mode range, and thermal stability over –40°C to +85°C.
FAQ
What is the maximum common-mode input voltage range supported by the INA154UA/2K5?
The INA154UA/2K5 supports a linear common-mode input voltage range from 2·V+ – 5V to 2·V– + 5V. For example, with ±15V supplies, this extends from –25V to +35V - enabling measurement of differential signals that exceed the positive or negative supply rails. This capability is critical in shunt-based current sensing where the common-mode voltage may sit near bus voltage.
Can the INA154UA/2K5 be used with single-supply operation?
No, the INA154UA/2K5 is specified only for dual-supply operation from ±4V to ±18V. It does not support true single-supply configurations (e.g., 0V and +Vs). The input common-mode range and output swing are defined relative to symmetric rails, and the internal architecture requires both positive and negative supplies to function within datasheet specifications.
What is the purpose of the Sense pin (Pin 8) on the INA154UA/2K5?
Pin 8 (Sense) is an internal Kelvin sense connection for the output stage and is not intended for external connection. It is an uncommitted, unbonded terminal - leaving it unconnected is mandatory. External connection to Pin 8 may introduce instability or degrade output accuracy, as confirmed in the official TI datasheet SBOS104.
How does the Ref pin (Pin 1) affect the output of the INA154UA/2K5?
The Ref pin (Pin 1) establishes the reference level for the output voltage. The output is defined as VOUT = V+In – V–In + VRef. Applying a DC voltage to Ref allows precise offset adjustment - for example, adding +2.5V shifts the entire output range upward by 2.5V. To preserve CMRR, the source impedance driving Ref must be <10Ω.
Is the INA154UA/2K5 pin-compatible with other members of the INA15x family?
Yes, the INA154UA/2K5 shares identical SO-8 pinout and electrical behavior with the INA154U, INA154U/2K5, and INA154UA variants. Differences are limited to packaging (tape-and-reel vs. tube) and ordering suffixes - all share the same die, pin configuration, and full specification compliance per SBOS104.
INA154UA/2K5 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:
- 14V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 3.1 MHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 2.4mA
- Current - Output / Channel:
- 60 mA
- Voltage - Supply Span (Min):
- 8 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
INA154UA/2K5 FAQ
1.How can I place an order for INA154UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA154UA/2K5 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 INA154UA/2K5 reliable?
The price and inventory of INA154UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA154UA/2K5 is usually 5 days.
3.What payment methods are accepted for INA154UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA154UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA154UA/2K5?
INA154UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA154UA/2K5 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 INA154UA/2K5?
For technical support, including INA154UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA154UA/2K5 requirements.
6.How does Aetrix verify that INA154UA/2K5 is sourced from the original manufacturer or authorized distributors?
All INA154UA/2K5 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 INA154UA/2K5 meets industry standards.
7.What is the process for return or replacement of INA154UA/2K5?
All INA154UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with INA154UA/2K5, 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 INA154UA/2K5 part is unused and in its original packaging.
Return procedure for INA154UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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