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Texas Instruments INA337AIDGKTG4
- Part No.:
- INA337AIDGKTG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA337AIDGKTG4.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,743
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Product details
Overview
INA337AIDGKTG4 from Texas Instruments is a high-temperature, precision instrumentation amplifier in an MSOP-8 package, featuring 100 µV max offset voltage, 0.4 µV/°C max drift, and rail-to-rail input operation extending 0.25 V beyond the negative rail and to within 0.1 V of the positive rail. It delivers stable gain (G = 2×R₂/R₁) with 1 kHz filter-limited bandwidth and supports single-supply operation from +2.7 V to +5.5 V for bridge sensor signal conditioning.
For engineers reviewing the INA337AIDGKTG4 datasheet, INA337AIDGKTG4 pinout, INA337AIDGKTG4 application, or INA337AIDGKTG4 equivalent, key selection criteria include its wide –40°C to +125°C operating range, low 1/f noise suppression via internal auto-correction, ±2 nA max input bias current, and compatibility with external gain-setting resistors for configurable amplification in high-accuracy transducer interfaces.
Technical Context
The INA337AIDGKTG4 employs a patented current-mode topology that converts differential input voltage into proportional current, eliminating dependence on resistor matching for common-mode rejection-CMR remains ≥100 dB over temperature without external trimming. Its internal charge-pump supplies enable true rail-to-rail input stage operation and allow output swing to within 75 mV of V+ and 250 mV of V–.
Dynamic performance is governed by externally configured R₂C₂ and R₀C₀ filters: a 1 kHz corner yields 0.95 ms 0.1% settling time and suppresses 90 kHz auto-correction spurs, while higher cutoffs trade noise for speed. Input bias current return paths must be provided externally (±0.2 nA typical), and supply bypassing with 0.1 µF across V+–V– is mandatory for specified accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage (max) | ±100 µV - ensures ≤0.1% error at 100 mV full-scale input without calibration |
| Offset Drift (max) | ±0.4 µV/°C - guarantees <1 µV total drift over 125°C industrial range |
| Common-Mode Rejection | ≥100 dB over –40°C to +125°C - maintains accuracy despite ground shifts in noisy industrial environments |
| Input Voltage Range | (V–) + 0.25 V to (V+) + 0.1 V - enables direct connection to grounded thermocouples or bridge outputs without level-shifting |
| Supply Voltage Range | +2.7 V to +5.5 V - supports battery-powered and 3.3 V/5 V system rails with no external regulators |
| Quiescent Current | 2.4 mA typical - allows continuous operation in low-power data acquisition nodes |
| Bandwidth (–3 dB) | 1 kHz (with 1 kHz filter) - optimized for DC–100 Hz sensor signals like load cells and RTDs |
Pinout & Package
INA337AIDGKTG4 is housed in an 8-pin MSOP (VSSOP-DGK) package, 3.0 mm × 3.0 mm × 1.07 mm, JEDEC MO-187 compliant, with exposed thermal pad (not electrically connected). Pin 1 is marked with a dot; device orientation follows standard MSOP top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN–) | Inverting input terminal | Accepts differential input; requires external bias path (e.g., 10 MΩ to V–) for stable DC operation |
| 2 (VIN+) | Non-inverting input terminal | Accepts differential input; same bias requirement as Pin 1; matched impedance critical for CMR |
| 3 (V–) | Negative supply rail | Reference for internal charge pumps; must be decoupled to V+ with 0.1 µF ceramic capacitor |
| 4 (V+) | Positive supply rail | Primary power input; connects to internal charge pumps enabling rail-to-rail input stage |
| 5 (IACOMMON) | Output reference node | Low-side of R₂; sets output common-mode voltage; must be tied to system reference (e.g., ADC REF) |
| 6 (VO) | Amplified output | Buffered voltage output; swing limited to (V–) + 0.25 V and (V+) – 0.075 V under load |
| 7 (R₁) | Gain-setting resistor terminal | Connects to external R₁; forms first stage gain with A₁/A₂; min R₁ = 2 kΩ per design equation |
| 8 (R₂) | Gain-setting resistor terminal | Connects to external R₂ and C₂; defines overall gain G = 2×(R₂/R₁); also sets filter pole with C₂ |
Key Features
| Feature | Design Value |
|---|---|
| Current-mode architecture | Eliminates resistor-matching dependency for CMR, enabling >100 dB rejection without laser trimming |
| Internal auto-correction circuitry | Suppresses 1/f noise below 100 Hz, reducing 0.01–10 Hz peak-to-peak noise to 0.8 µV |
| Rail-to-rail input range | Operates linearly from (V–) + 0.25 V to (V+) + 0.1 V, supporting grounded-sensor configurations |
| Charge-pump powered stages | Extends internal supply rails beyond V+ and V–, enabling output swing to within 75 mV of V+ |
| Configurable filtering | R₂C₂ and R₀C₀ networks allow independent optimization of noise (1 kHz filter → 0.8 µVpp) vs. bandwidth (10 kHz filter → 130 µs settling) |
Applications
| Bridge Sensor Amplifier | High-Resolution Data Acquisition |
|---|---|
Use Scenario: Amplifying mV-level outputs from strain-gauge load cells in industrial weighing systems with ±0.02% linearity requirement. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing fixed-gain (G = 100), low-drift signal conditioning before 24-bit sigma-delta ADC. Use Value: 100 µV max offset and 0.4 µV/°C drift ensure <0.01% full-scale error over temperature without recalibration. | Use Scenario: Multi-channel sensor hub acquiring synchronized analog inputs from thermocouples, RTDs, and pressure transducers in test equipment. IC Role / Device Role / Timing Role: Channel-isolated front-end amplifier with programmable gain and matched CMR for simultaneous sampling. Use Value: ≥100 dB CMR and 10¹⁰ Ω input impedance prevent crosstalk and loading errors across 16-channel designs. |
| Automotive Battery Monitoring | Medical Instrumentation |
Use Scenario: Measuring cell voltage differentials in 12S Li-ion battery packs under vibration and wide ambient temperature (–40°C to +105°C). IC Role / Device Role / Timing Role: High-CMR differential amplifier rejecting common-mode noise from switching converters and motor drives. Use Value: Stable 100 dB CMR up to 10 kHz and –40°C to +125°C rating ensure reliable voltage monitoring during cold cranking and hot soak. | Use Scenario: Low-noise amplification of ECG electrode signals (<10 µV amplitude) in portable patient monitors with strict 10 µVpp noise budget. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with 1 kHz filter suppressing 50/60 Hz interference and auto-correction spurs. Use Value: 0.8 µVpp 0.01–10 Hz noise and 90 kHz clock spur attenuation via external filtering meet IEC 60601-2-27 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA128UA/2K5 | 50 µV max VOS, 0.5 µV/°C drift, 125 dB CMR, 750 µA IQ, SO-8 package | Lower offset but higher drift and narrower temp range (–40°C to +85°C); no internal auto-correction | Select for ultra-low-offset DC-critical apps where power is constrained and temperature range is limited |
| INA326EA/250 | Rail-to-rail I/O, 2.4 mA IQ, 2.4 µV/°C drift, MSOP-8, no shutdown | Higher drift, no auto-correction, wider bandwidth (1.5 MHz), but superior output drive capability | Select when rail-to-rail output swing and high-speed response (>100 kHz) outweigh low-drift requirements |
Compared with INA128UA/2K5 and INA326EA/250, the INA337AIDGKTG4 uniquely combines high-temperature operation (–40°C to +125°C), ultra-low drift (0.4 µV/°C), and integrated 1/f noise cancellation-making it optimal for uncalibrated, long-life sensor systems in harsh environments where stability trumps raw speed or lowest initial offset.
Availability
INA337AIDGKTG4 is available at Aetrix Electronics and suitable for industrial weighing systems, automotive battery management, medical ECG front-ends, and high-resolution data acquisition requiring stable component supply across extended temperature ranges.
Supply support for INA337AIDGKTG4 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 signal chain solutions.
The INA337AIDGKTG4 belongs to TI's high-temperature instrumentation amplifier product line, engineered specifically for ruggedized sensor signal conditioning in automotive, industrial, and medical applications where long-term DC stability and noise immunity are critical.
FAQ
What is the maximum operating temperature for the INA337AIDGKTG4?
The INA337AIDGKTG4 is fully specified over –40°C to +125°C and can operate continuously up to +150°C. Its electrical characteristics-including offset voltage, drift, and CMR-are guaranteed across the full –40°C to +125°C range, making it suitable for under-hood automotive and industrial control applications where ambient temperatures exceed standard commercial limits. The junction temperature must not exceed +150°C.
Does the INA337AIDGKTG4 require external gain-setting resistors?
Yes, the INA337AIDGKTG4 requires two external precision resistors (R₁ and R₂) to set gain according to G = 2×(R₂/R₁). R₁ connects between Pins 7 and 8; R₂ connects between Pin 8 and IACOMMON (Pin 5). Minimum R₁ is 2 kΩ; recommended values for gains of 1–1000 are tabulated in the datasheet. Resistor tolerance and TCR directly impact gain accuracy and temperature stability.
How does the INA337AIDGKTG4 achieve rail-to-rail input operation?
The INA337AIDGKTG4 achieves rail-to-rail input using internal charge-pump circuitry that generates auxiliary supply rails beyond V+ and V–, powering the input amplifiers (A₁ and A₂). This allows the input stage to accept common-mode voltages from (V–) + 0.25 V to (V+) + 0.1 V-extending 0.25 V below V– and slightly beyond V+-without clipping or distortion, unlike conventional op-amp-based instrumentation amplifiers.
What is the purpose of the IACOMMON pin (Pin 5) on the INA337AIDGKTG4?
The IACOMMON pin (Pin 5) on the INA337AIDGKTG4 serves as the output reference node-the low-side connection point of the external gain-setting resistor R₂. It establishes the common-mode voltage of the amplified output and must be tied to the system reference (e.g., ADC reference midpoint or signal ground). Unlike traditional instrumentation amplifiers, IACOMMON is not a reference input but a defined output node critical for proper gain and filter function.
Can the INA337AIDGKTG4 be used with dual supplies?
Yes, the INA337AIDGKTG4 supports dual-supply operation (e.g., ±2.5 V), though its architecture is optimized for single-supply use. When operated on dual supplies, the input common-mode range remains (V–) + 0.25 V to (V+) + 0.1 V, and the output swing extends to within 250 mV of V– and 75 mV of V+. External gain resistor values differ between single- and dual-supply configurations; the datasheet provides separate tables for each case.
INA337AIDGKTG4 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:
- Discontinued at Digi-Key
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1 kHz
- Current - Input Bias:
- 200 pA
- Voltage - Input Offset:
- 20 µV
- Current - Supply:
- 2.4mA
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
INA337AIDGKTG4 FAQ
1.How can I place an order for INA337AIDGKTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA337AIDGKTG4 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 INA337AIDGKTG4 reliable?
The price and inventory of INA337AIDGKTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA337AIDGKTG4 is usually 5 days.
3.What payment methods are accepted for INA337AIDGKTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA337AIDGKTG4 transactions.
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4.How is shipping managed for INA337AIDGKTG4?
INA337AIDGKTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA337AIDGKTG4 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 INA337AIDGKTG4?
For technical support, including INA337AIDGKTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA337AIDGKTG4 requirements.
6.How does Aetrix verify that INA337AIDGKTG4 is sourced from the original manufacturer or authorized distributors?
All INA337AIDGKTG4 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 INA337AIDGKTG4 meets industry standards.
7.What is the process for return or replacement of INA337AIDGKTG4?
All INA337AIDGKTG4 units undergo pre-shipment inspection (PSI). If there is an issue with INA337AIDGKTG4, 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 INA337AIDGKTG4 part is unused and in its original packaging.
Return procedure for INA337AIDGKTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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