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Texas Instruments INA159AMDGKTEP
- Part No.:
- INA159AMDGKTEP
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA159AMDGKTEP.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,336
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Product details
Overview
INA159AMDGKTEP from Texas Instruments is a precision G = 0.2 difference amplifier optimized for ±10-V signal translation into single-supply ADCs, featuring ±0.024% max gain accuracy, 1.5 MHz bandwidth, and ±100 µV max offset voltage. It operates from 1.8 V to 5.5 V single supply and supports rail-to-rail common-mode input beyond supply rails - enabling direct interfacing with industrial sensors and legacy bipolar instrumentation in defense/aerospace systems.
For engineers reviewing the INA159AMDGKTEP datasheet, INA159AMDGKTEP pinout, INA159AMDGKTEP application, or INA159AMDGKTEP equivalent, this device is selected for high-accuracy differential-to-single-ended conversion where gain stability over temperature, low noise, and extended military-grade operating range (–55°C to +125°C) are critical design requirements.
Technical Context
The INA159AMDGKTEP integrates a precision op amp with laser-trimmed thin-film resistor network (20kΩ/40kΩ/100kΩ ratios) to deliver fixed G = 0.2 with ±0.024% initial gain error and ±0.035% drift over temperature. Its input stage uses complementary rail-to-rail topology eliminating offset transitions across the full common-mode range.
Common-mode rejection exceeds 74 dB over –55°C to +125°C, maintained by matched TCR tracking of on-chip resistors; reference inputs (REF1/REF2) support flexible biasing - including mid-supply or external reference configurations - while SENSE pin enables output monitoring without loading the main output path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 0.2 (G = 1/5); enables ±10-V differential input to produce 0–4 V output compatible with 5-V single-supply ADCs like ADS8325. |
| Gain Accuracy | ±0.024% max at +25°C; ensures <±1 mV absolute error in 4-V full-scale output, critical for 16-bit system linearity. |
| Bandwidth | 1.5 MHz (–3 dB); supports accurate digitization of signals up to ~100 kHz with minimal phase distortion. |
| Slew Rate | 15 V/µs; handles fast transient inputs (e.g., motor current spikes) without slewing-induced distortion. |
| Input Offset Voltage | ±100 µV max at +25°C; contributes <±0.05 mV error at 4-V output, preserving DC measurement fidelity. |
| Supply Range | 1.8 V to 5.5 V single supply; allows operation from low-power 1.8-V microcontrollers or standard 5-V industrial rails. |
| Operating Temperature | –55°C to +125°C; qualified for extended product life cycle in defense, aerospace, and downhole industrial environments. |
Pinout & Package
INA159AMDGKTEP is housed in an MSOP-8 (VSSOP-DGK) package, 3.0 mm × 3.0 mm × 1.1 mm height, with exposed thermal pad for enhanced power dissipation in high-reliability applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF1) | Reference Input 1 | Connects to ground or half-reference voltage; sets common-mode level for internal op amp biasing. |
| 2 (+IN) | Noninverting Input | Differential input terminal accepting up to ±30 V; extends beyond supply rails for robust sensor interface. |
| 3 (−IN) | Inverting Input | Differential input terminal; paired with +IN to reject common-mode noise from long cables or noisy environments. |
| 4 (V−) | Negative Supply | Accepts ground or negative rail; supports single- or split-supply operation down to 1.8-V total supply. |
| 5 (SENSE) | Output Sense | Low-impedance buffered copy of OUT; enables remote feedback or monitoring without loading main output path. |
| 6 (OUT) | Main Output | Single-ended G = 0.2 scaled output; drives ADC inputs directly with rail-to-rail swing capability. |
| 7 (V+) | Positive Supply | Accepts up to +5.5 V; powers internal op amp and resistor network with low quiescent current (1.5 mA typ). |
| 8 (REF2) | Reference Input 2 | Connects to external reference (e.g., 4.096 V) to set output zero point; used with REF1 to configure bias point. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed resistor network | Enables ±0.024% gain accuracy and <±0.05% gain drift over –55°C to +125°C - no external trimming required. |
| Rail-to-rail common-mode input | Accepts inputs from –12.5 V to +17.5 V at 5-V supply, allowing direct connection to ±10-V industrial transducers without level-shifting circuitry. |
| Low 1/f noise | 10 µVPP (0.1 Hz–10 Hz); minimizes drift in precision DC measurements such as strain gauge or thermocouple conditioning. |
| High CMRR | 94 dB min over temperature; rejects EMI and ground-loop noise in motor control feedback or medical sensor front-ends. |
| Extended temperature qualification | Tested and characterized across –55°C to +125°C per MIL-PRF-38535 Class V flow; includes controlled baseline and traceability for defense programs. |
Applications
| Industrial Process Control | Defense Avionics Signal Conditioning |
|---|---|
|
Use Scenario: Converting ±10-V analog outputs from pressure/flow transmitters into 0–4 V range for 16-bit SAR ADCs in PLC I/O modules. IC Role / Device Role / Timing Role: Precision difference amplifier performing bipolar-to-unipolar translation with fixed 0.2 gain and rail-to-rail input tolerance. Use Value: Eliminates need for external precision resistors and op amps, reducing BOM count and layout area while maintaining <±0.01% system gain error over temperature. |
Use Scenario: Interfacing legacy flight control sensors (e.g., gyros, accelerometers) with modern single-supply FPGAs in airborne mission computers. IC Role / Device Role / Timing Role: High-reliability signal translator ensuring stable common-mode rejection and glitch-free operation during rapid voltage transients. Use Value: Qualified to –55°C/+125°C with extended product lifecycle support and full traceability - meeting DO-254/DO-160 environmental compliance requirements. |
| Medical Diagnostic Equipment | Audio Line Receiver |
|
Use Scenario: Front-end amplification for ECG/EEG analog acquisition channels requiring ultra-low offset and sub-mV DC accuracy. IC Role / Device Role / Timing Role: Differential-to-single-ended converter with <±100 µV offset and 10 µVPP 0.1–10 Hz noise for high-fidelity biopotential signal capture. Use Value: Enables >14-bit effective resolution in battery-powered portable diagnostics without active offset cancellation circuitry. |
Use Scenario: Balanced audio line receiver converting professional XLR-level ±10-V differential signals to 0–4 V for ADC sampling in studio interfaces. IC Role / Device Role / Timing Role: High-slew-rate (15 V/µs), low-distortion (0.001% THD+N @ 1 kHz) difference amplifier with wide common-mode range. Use Value: Preserves dynamic range and channel separation in high-fidelity audio paths while rejecting cable-borne RFI and hum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA149MDR | G = 1, higher input impedance (200 kΩ diff), wider supply (±2.25 V to ±18 V), but only rated to +105°C. | Better for high-voltage industrial isolation stages; lacks military temp range and EP-level traceability. | Select when gain = 1 is acceptable and extended temperature is not required; not drop-in due to different gain and pinout. |
| INA157UA | G = 0.2, SOIC-8 package, commercial temp (–40°C to +85°C), ±0.05% gain error (vs. ±0.024% for INA159AMDGKTEP). | Suitable for cost-sensitive industrial automation; lacks defense/aerospace qualification and extended lifecycle support. | Use for non-critical applications where military spec and full traceability are unnecessary; same function but lower accuracy and reliability grade. |
Compared with INA159AMDGKTEP, INA149MDR offers higher voltage range but sacrifices military temperature rating and gain precision, while INA157UA provides functional equivalence at lower cost and reliability - making INA159AMDGKTEP the sole choice when defense-grade performance, ±0.024% gain accuracy, and full product lifecycle control are mandatory.
Availability
INA159AMDGKTEP is available at Aetrix Electronics and suitable for defense avionics, industrial process control, and medical diagnostic equipment requiring stable component supply across extended product lifecycles.
Supply support for INA159AMDGKTEP 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 heritage in precision signal chain components.
The INA159-EP product line delivers radiation-tolerant, extended-temperature difference amplifiers designed specifically for high-reliability defense, aerospace, and critical industrial applications demanding guaranteed long-term availability and full traceability.
FAQ
What is the maximum input voltage range supported by the INA159AMDGKTEP?
The INA159AMDGKTEP accepts differential input voltages from –10 V to +10 V, with common-mode input range extending to –12.5 V and +17.5 V at a 5-V supply. Absolute maximum ratings allow ±30 V on +IN/−IN pins, but functional operation is specified within ±10 V differential input for G = 0.2 scaling. This enables direct interfacing with legacy industrial sensors without external attenuation.
Does the INA159AMDGKTEP require external resistors to set gain?
No, the INA159AMDGKTEP has an integrated, laser-trimmed thin-film resistor network that fixes the gain at 0.2 (1/5). No external resistors are needed for gain setting - simplifying layout, improving temperature stability, and eliminating matching errors. The internal resistors are trimmed to ±0.024% gain accuracy at +25°C and maintain tight tracking over –55°C to +125°C.
Can the INA159AMDGKTEP operate from a 1.8-V single supply?
Yes, the INA159AMDGKTEP is fully specified to operate from a 1.8-V to 5.5-V single supply. At 1.8 V, it maintains rail-to-rail common-mode input capability and delivers usable output swing (e.g., ~0.05 V to ~1.75 V), making it suitable for ultra-low-power portable instrumentation. Quiescent current remains below 2.0 mA across the full temperature range.
What is the purpose of the SENSE pin on the INA159AMDGKTEP?
Pin 5 (SENSE) provides a low-impedance, buffered replica of the main OUT signal. It allows remote sensing or feedback without loading the primary output path - critical when driving capacitive loads (e.g., ADC input capacitance) or long PCB traces. Unlike OUT, SENSE is not intended to source significant current and must not be shorted or loaded beyond 100 µA.
Is the INA159AMDGKTEP pin-compatible with other Texas Instruments difference amplifiers?
No, the INA159AMDGKTEP has a unique 8-pin MSOP (DGK) pinout optimized for its dual-reference architecture (REF1/REF2) and SENSE functionality. It is not pin-compatible with INA149, INA157, or INA163. Layout reuse requires verification against the official DGK package drawing and thermal pad grounding guidelines - especially for defense applications where thermal reliability is critical.
INA159AMDGKTEP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 15V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.5 MHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 1.1mA
- Current - Output / Channel:
- 60 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
INA159AMDGKTEP FAQ
1.How can I place an order for INA159AMDGKTEP through Aetrix?
Please submit a Request for Quotation (RFQ) for INA159AMDGKTEP 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 INA159AMDGKTEP reliable?
The price and inventory of INA159AMDGKTEP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA159AMDGKTEP is usually 5 days.
3.What payment methods are accepted for INA159AMDGKTEP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA159AMDGKTEP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA159AMDGKTEP?
INA159AMDGKTEP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA159AMDGKTEP 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 INA159AMDGKTEP?
For technical support, including INA159AMDGKTEP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA159AMDGKTEP requirements.
6.How does Aetrix verify that INA159AMDGKTEP is sourced from the original manufacturer or authorized distributors?
All INA159AMDGKTEP 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 INA159AMDGKTEP meets industry standards.
7.What is the process for return or replacement of INA159AMDGKTEP?
All INA159AMDGKTEP units undergo pre-shipment inspection (PSI). If there is an issue with INA159AMDGKTEP, 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 INA159AMDGKTEP part is unused and in its original packaging.
Return procedure for INA159AMDGKTEP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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