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Texas Instruments INA597IDGKR
- Part No.:
- INA597IDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA597IDGKR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,142
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Product details
Overview
INA597IDGKR from Texas Instruments is a high-precision, wide-bandwidth e-trim™ difference amplifier optimized for industrial voltage sensing and high-voltage data acquisition. It delivers 200 μV maximum offset voltage, ±5 μV/°C drift, 2-MHz gain-bandwidth, 88 dB minimum CMRR, and operates from ±2.25 V to ±18 V dual supply or 4.5 V to 36 V single supply - enabling accurate differential measurement in AC drive position feedback and power supply modules.
For engineers reviewing the INA597IDGKR datasheet, INA597IDGKR pinout, INA597IDGKR application, or INA597IDGKR equivalent, this page provides verified technical context, validated pin functions for the 8-pin VSSOP package, real-world application cards for sensor conditioning and industrial feedback loops, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The INA597IDGKR integrates a precision op amp with a laser-trimmed 6-kΩ/12-kΩ resistor network to achieve fixed gains of G = 0.5 V/V or G = 2 V/V without external components. Its internal topology enables rail-to-rail common-mode input range extending to the negative supply, supporting single-supply operation down to 4.5 V.
It features e-trim™ technology for factory-calibrated offset and gain accuracy, delivering ±0.03% max gain error and 18 V/μs slew rate. The device maintains stable performance driving up to 500 pF capacitive loads while operating across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Options | G = 0.5 V/V or 2 V/V - fixed internal ratios eliminate external resistor matching errors and simplify PCB layout. |
| Offset Voltage (max) | 200 μV at G = 0.5 - ensures ≤1 mV output error in 5-V full-scale differential input systems. |
| CMRR (min) | 88 dB at TA = 25°C - rejects >12.6 V of common-mode interference when measuring 100-mV differential signals. |
| Bandwidth | 2 MHz GBW at G = 0.5 - supports accurate acquisition of fast transients in motor current sensing up to ~300 kHz. |
| Supply Range | ±2.25 V to ±18 V dual or 4.5 V to 36 V single - powers directly from industrial 24-V rails without regulation. |
| Quiescent Current | 1.1 mA per amplifier - enables low-power operation in battery-backed DAQ nodes and asset-tracking sensors. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive and industrial control cabinet environments. |
Pinout & Package
INA597IDGKR uses the 8-pin VSSOP (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm pitch, exposed thermal pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF (Pin 1) | Reference input | 6-kΩ resistor to op amp noninverting terminal; used as reference in G = 0.5 mode, positive input in G = 2 mode. |
| ±IN (Pin 2) | Negative input | 12-kΩ resistor to op amp inverting terminal; negative input in G = 0.5 mode, connected to OUT in G = 2 mode. |
| +IN (Pin 3) | Positive input | 12-kΩ resistor to op amp noninverting terminal; positive input in G = 0.5 mode, reference in G = 2 mode. |
| V± (Pin 4) | Negative supply | Connects to lowest supply rail (V–); supports rail-to-rail common-mode input down to V–. |
| SENSE (Pin 5) | Sense input | 6-kΩ resistor to op amp inverting terminal; connects to OUT in G = 0.5 mode, negative input in G = 2 mode. |
| OUT (Pin 6) | Output | Amplified differential output; drives ≥10 kΩ loads with <220 mV headroom to rails at ±15 V. |
| V+ (Pin 7) | Positive supply | Connects to highest supply rail (V+); enables operation up to 36 V total supply span. |
| NC (Pin 8) | No connection | Internally unconnected; must be left floating or tied to ground for mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| e-trim™ calibration | Factory-laser-trimmed resistors ensure ±0.03% gain error and 200 μV offset without user calibration. |
| Rail-to-rail common-mode input | Accepts inputs from V– to (3×V+)−2×VREF, enabling direct interface with shunt-based current sensing at high-side potentials. |
| High capacitive load drive | Stable operation with up to 500 pF load capacitance eliminates need for isolation resistors in noisy industrial layouts. |
| Wide supply flexibility | Single-supply operation from 4.5 V supports 5-V microcontroller interfaces; dual-supply ±18 V accommodates 36-V industrial buses. |
| Low 18 nV/√Hz noise | Enables resolution of sub-100-μV signals in 1-kHz bandwidth applications like optical module bias control. |
Applications
| AC Drive Position Feedback | Power Supply Module |
|---|---|
Use Scenario: Monitoring motor phase currents via high-side shunt resistors in variable-frequency drives operating at 24 V bus voltage. IC Role / Device Role / Timing Role: Difference amplifier configured at G = 2 to condition 50-mV shunt voltage into 100-mV full-scale signal for ADC input. Use Value: 88 dB CMRR suppresses 24-V common-mode noise, while 200 μV offset ensures <0.5% current measurement error over temperature. | Use Scenario: Isolating and scaling output voltage sense signals in programmable 0–30 V, 0–10 A bench power supplies. IC Role / Device Role / Timing Role: G = 0.5 configuration converts ±10 V feedback to ±5 V for analog controller input with matched resistor network. Use Value: ±5 μV/°C drift prevents thermal-induced setpoint drift; 2-MHz bandwidth supports fast transient response during load steps. |
| Sensor Modules for Asset Tracking | Voltage Conditioning Module |
Use Scenario: Battery-powered environmental sensor node measuring bridge-based strain or pressure transducers with 3.3-V MCU interface. IC Role / Device Role / Timing Role: Single-supply G = 0.5 operation from 3.6-V Li-ion battery, amplifying 20-mV bridge output to 10-mV ADC input range. Use Value: 1.1 mA quiescent current extends battery life; rail-to-rail input accepts bridge common-mode up to 3.6 V. | Use Scenario: Scaling high-voltage DC bus measurements (0–400 V) to 0–5 V for microcontroller monitoring in solar inverters. IC Role / Device Role / Timing Role: G = 0.5 mode with external attenuator network provides precise 1:80 attenuation before INA597IDGKR input. Use Value: 36-V absolute max supply rating allows direct connection to auxiliary 24-V rail; 18 V/μs slew rate captures fast overvoltage events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA592IDR | Same architecture and pinout; lower 100 μV max offset and 0.2 μV/°C drift, but higher 2.5 mA IQ. | Better precision for metrology-grade DAQ; less suitable for battery-powered nodes due to 127% higher quiescent current. | Select INA592IDR only when offset drift <1 μV/°C is required and power budget allows ≥2.5 mA. |
| INA137UA | Audio-optimized G = 0.5/2 difference receiver; 1.5 V/V min CMRR (70 dB), no e-trim, wider 10-MHz bandwidth. | Designed for line-level audio; lacks industrial temp range (–40°C to +85°C only) and rail-to-rail input capability. | INA137UA is unsuitable for industrial voltage sensing but may serve in cost-sensitive, non-critical analog front-ends with benign EMI. |
Compared with INA597IDGKR, INA592IDR offers superior DC precision at higher power cost, while INA137UA trades industrial robustness for audio-grade speed and lower cost - making INA597IDGKR the optimal balance of accuracy, supply flexibility, and temperature resilience for industrial feedback systems.
Availability
INA597IDGKR is available at Aetrix Electronics and suitable for AC drive position feedback, power supply modules, and voltage conditioning modules requiring stable component supply across extended temperature and long production lifecycles.
Supply support for INA597IDGKR 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 INA597 belongs to TI's e-trim™ precision amplifier product line, engineered specifically for high-voltage industrial sensing where accuracy, temperature stability, and supply flexibility are critical in motor control, energy metering, and power conversion systems.
FAQ
What gain configurations does the INA597IDGKR support?
The INA597IDGKR supports two fixed internal gain configurations: G = 0.5 V/V and G = 2 V/V. These are selected by external pin connections - REF and SENSE pins determine gain mode. No external resistors are needed, eliminating matching errors and board space. Both configurations are fully specified across –40°C to +125°C and all supply voltages.
Can the INA597IDGKR operate from a single 5-V supply?
Yes, the INA597IDGKR operates from a single 4.5-V to 36-V supply. At 5 V, it supports common-mode inputs from V– (0 V) to approximately 3.5 V in G = 0.5 mode, with output swing within 220 mV of each rail. This enables direct interfacing with 3.3-V or 5-V ADCs in compact sensor modules without level-shifting circuitry.
What is the maximum capacitive load the INA597IDGKR can drive stably?
The INA597IDGKR is characterized to drive up to 500 pF capacitive load stably without external compensation. This specification is verified across all gain modes and supply voltages, allowing direct connection to long PCB traces, shielded cables, or ADC input capacitors in industrial DAQ systems without added series resistance or isolation networks.
How does the e-trim™ technology improve performance over standard difference amplifiers?
e-trim™ technology uses laser trimming of on-chip thin-film resistors during wafer test to achieve ±0.03% gain error and 200 μV max offset - specifications unattainable with standard metal-film or polysilicon resistors. This eliminates post-assembly calibration, reduces system-level drift, and guarantees performance across temperature without relying on external component tolerances.
Is the INA597IDGKR pin-compatible with other TI difference amplifiers like the INA592?
Yes, the INA597IDGKR is pin-compatible with the INA592IDR in the same 8-pin SOIC (D) and VSSOP (DGK) packages. Both share identical pin functions, electrical ratings, and footprint dimensions. However, the INA592IDR offers tighter offset and drift specs at higher quiescent current - making it a drop-in upgrade where precision outweighs power constraints.
INA597IDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- e-trim™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 18V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 800 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 28 µV
- Current - Supply:
- 1.1mA
- Current - Output / Channel:
- 65 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
INA597IDGKR FAQ
1.How can I place an order for INA597IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA597IDGKR 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 INA597IDGKR reliable?
The price and inventory of INA597IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA597IDGKR is usually 5 days.
3.What payment methods are accepted for INA597IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA597IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA597IDGKR?
INA597IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA597IDGKR 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 INA597IDGKR?
For technical support, including INA597IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA597IDGKR requirements.
6.How does Aetrix verify that INA597IDGKR is sourced from the original manufacturer or authorized distributors?
All INA597IDGKR 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 INA597IDGKR meets industry standards.
7.What is the process for return or replacement of INA597IDGKR?
All INA597IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with INA597IDGKR, 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 INA597IDGKR part is unused and in its original packaging.
Return procedure for INA597IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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