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Texas Instruments INA597IDGKT
- Part No.:
- INA597IDGKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA597IDGKT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,261
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Product details
Overview
INA597IDGKT from Texas Instruments is a high-precision, wide-bandwidth e-trim™ difference amplifier in an 8-pin VSSOP package. It delivers 2-MHz gain-bandwidth, ±5 μV/°C max offset drift, 18 nV/√Hz noise at 1 kHz, and 88 dB minimum CMRR - enabling accurate differential signal conditioning in high-voltage industrial sensor interfaces and data acquisition systems.
For engineers reviewing the INA597IDGKT datasheet, INA597IDGKT pinout, INA597IDGKT application, or INA597IDGKT equivalent, this page provides verified specifications, validated pin functions for the DGK (VSSOP-8) variant, real-world use cases in flow transmitters and servo drive feedback, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The INA597IDGKT integrates a precision op amp with a laser-trimmed 6-kΩ/12-kΩ resistor network to achieve stable gain accuracy and common-mode rejection over temperature. Its internal architecture supports dual fixed gains - G = 0.5 V/V and G = 2 V/V - selected via external pin configuration without external resistors.
It features rail-to-rail output swing capability, input common-mode range extending to the negative supply, and robust capacitive load drive up to 500 pF. The device operates across ±2.25 V to ±18 V dual supplies or 4.5 V to 36 V single supply, with guaranteed performance from –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 by internal resistor network; no external gain-setting components required |
| Offset voltage (max) | ±200 μV at G = 0.5 - ensures ≤0.4 mV error in 2-V full-scale differential input measurement |
| Offset drift (max) | ±5 μV/°C - limits thermal-induced error to <0.5 mV over 100°C ambient shift |
| CMRR (min) | 88 dB at TA = 25°C - rejects >8 kV of common-mode interference per 1 V differential signal |
| GBW | 2 MHz at G = 0.5 - supports ≤1 MHz closed-loop bandwidth with <1% gain error |
| Slew rate | 18 V/μs - enables clean 10-V step response in ≤1 μs (0.1% settling) |
| Supply range | 4.5 V to 36 V single supply - compatible with 5 V, 12 V, 24 V industrial rails without level-shifting |
| Operating temp | –40°C to +125°C - qualified for under-hood automotive, motor control, and industrial power module environments |
Pinout & Package
INA597IDGKT is supplied in an 8-pin VSSOP (DGK) package measuring 3.00 mm × 3.00 mm, with exposed pad for thermal enhancement. Pin functions are validated per TI SBOS385B Rev B (April 2021).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 REF | Reference input | 6-kΩ resistor to op amp noninverting terminal; used as reference in G = 0.5 mode, positive input in G = 2 mode |
| 2 ±IN | Negative input | 12-kΩ resistor to op amp inverting terminal; negative input in G = 0.5, feedback node in G = 2 |
| 3 +IN | Positive input | 12-kΩ resistor to op amp noninverting terminal; positive input in G = 0.5, reference in G = 2 |
| 4 V± | Power supply | Negative supply rail (V–); extends to rail for true single-supply operation |
| 5 SENSE | Sense input | 6-kΩ resistor to op amp inverting terminal; connects to output in G = 0.5, negative input in G = 2 |
| 6 OUT | Output | Amplified differential output; drives ≥10 kΩ loads with 18 V/μs slew rate |
| 7 V+ | Power supply | Positive supply rail (V+); supports up to 36 V single supply or ±18 V dual supply |
| 8 NC | No connection | No internal bond; may be left floating or grounded for mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| e-trim™ resistor network | Laser-trimmed 6-kΩ/12-kΩ ratios ensure ±0.03% max gain error and <1 ppm nonlinearity over temperature |
| Rail-to-rail output | Swings within 130–220 mV of supply rails - preserves dynamic range in low-voltage 5-V or high-voltage 36-V systems |
| High capacitive load drive | Stable with up to 500 pF load - eliminates need for isolation resistors when driving ADC input filters or long PCB traces |
| Extended common-mode range | VCM extends to V– - enables direct sensing of signals referenced to ground or negative rails in single-supply configurations |
| Low quiescent current | 1.1 mA per amplifier - supports always-on monitoring in battery-backed DAQ or asset-tracking modules |
Applications
| Flow transmitter | AC drive position feedback |
|---|---|
Use Scenario: Amplifying low-level differential voltage from a bridge-based flow sensor in harsh industrial environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Difference amplifier configured at G = 0.5 to condition microvolt-level bridge outputs while rejecting common-mode noise from pump motors and inverters. Use Value: 88 dB CMRR and ±5 μV/°C drift ensure <0.1% full-scale error over –40°C to +125°C, meeting ISO 5167 flow meter accuracy requirements. | Use Scenario: Isolating and scaling resolver or encoder feedback signals in variable-frequency AC drives operating on 24 V or 36 V bus rails. IC Role / Device Role / Timing Role: High-bandwidth (2-MHz GBW), fast-settling (1 μs to 0.1%) difference amplifier for real-time rotor position reconstruction. Use Value: 18 V/μs slew rate and 500-pF load drive enable direct interface to SAR ADCs without buffering, reducing latency and component count. |
| Servo drive position feedback | Voltage conditioning module |
Use Scenario: Conditioning analog feedback from linear or rotary position sensors in closed-loop servo systems requiring sub-millisecond response and high DC precision. IC Role / Device Role / Timing Role: Precision difference amplifier with 200 μV max offset and 18 nV/√Hz noise, placed before 16-bit ADC in motion controller PCB. Use Value: Low noise and drift preserve 16-bit ENOB across temperature, enabling <1 LSB error in 0–10 V position command ranges. | Use Scenario: Scaling and isolating high-side voltage measurements (e.g., 0–30 V bus monitoring) into 0–3.3 V ADC input range in power supply modules. IC Role / Device Role / Timing Role: Fixed-gain (G = 0.5) difference amplifier with 36 V absolute max supply, directly connected across shunt or divider outputs. Use Value: Single-supply operation from 36 V rail and rail-to-rail output eliminate level-shifting circuitry, reducing BOM cost and layout area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA592IDGKT | Same pinout, identical G = 0.5/2 gain options, but higher precision: ±100 μV max offset, ±2.5 μV/°C drift, 12 nV/√Hz noise | Better suited for metrology-grade DAQ or calibration equipment where <0.05% total error is required | Select INA592IDGKT when offset and noise budgets are tighter; INA597IDGKT remains optimal for cost-sensitive industrial designs meeting ±0.1% accuracy |
| INA159IDGKT | Different gain: fixed G = 0.2 V/V only; lower bandwidth (1.2 MHz), higher offset (±500 μV max), but superior CMRR (100 dB min) | Targeted at level translation in audio or legacy instrumentation where attenuation and ultra-high CMR outweigh speed needs | Choose INA159IDGKT only for G = 0.2 applications requiring >90 dB CMRR; INA597IDGKT is not functionally substitutable due to incompatible gain architecture |
Compared with INA592IDGKT, the INA597IDGKT trades 2× higher offset and 50% more noise for lower unit cost and identical packaging - making it ideal for volume industrial sensing. Against INA159IDGKT, it offers 2.5× wider bandwidth and 2.5× lower offset but lacks its 0.2-V/V attenuation ratio and 100-dB CMRR, limiting direct substitution in precision level-shift roles.
Availability
INA597IDGKT is available at Aetrix Electronics and suitable for flow transmitter design, servo drive position feedback systems, and voltage conditioning modules requiring stable component supply across extended temperature and high-voltage industrial environments.
Supply support for INA597IDGKT 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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The INA597 belongs to TI's precision difference amplifier product line, engineered for high-voltage industrial signal conditioning where accuracy, bandwidth, and ruggedness must coexist in cost-constrained designs.
FAQ
What gain configurations does the INA597IDGKT support?
The INA597IDGKT supports two fixed gain configurations: G = 0.5 V/V and G = 2 V/V. These are implemented using an internal laser-trimmed resistor network and selected by external pin connections - no external resistors are needed. Gain selection is determined by how the REF, ±IN, +IN, and SENSE pins are wired per the functional diagram in TI SBOS385B. The INA597IDGKT does not support programmable or user-adjustable gain.
Does the INA597IDGKT require external compensation capacitors?
No, the INA597IDGKT is internally compensated and stable for capacitive loads up to 500 pF without external compensation. This allows direct connection to ADC input filters, long PCB traces, or scope probes without risk of peaking or oscillation. The device's phase margin remains >60° across all specified supply voltages and temperatures, as verified in TI's typical characteristics (Figures 7-49 and 7-50).
Can the INA597IDGKT operate from a single 5-V supply?
Yes, the INA597IDGKT operates from a single 4.5-V to 36-V supply, including 5-V rails. Its input common-mode range extends to the negative supply (V–), and its output swings within 130–220 mV of both rails - enabling full utilization of a 0–5 V ADC input range when configured at G = 0.5 with appropriate reference biasing. Performance parameters (offset, CMRR, bandwidth) are fully specified across this range.
What is the maximum junction temperature rating for the INA597IDGKT?
The INA597IDGKT has a maximum junction temperature (TJ) rating of +125°C, matching its specified operating ambient temperature range of –40°C to +125°C. Thermal resistance values for the DGK package are RθJA = 115°C/W and RθJB = 59.2°C/W. To maintain TJ ≤ 125°C at maximum ambient, power dissipation must remain below ~210 mW with standard PCB copper pour - verified in TI's thermal information table (Section 7.4).
How does the INA597IDGKT differ from the INA137 in terms of application suitability?
The INA597IDGKT targets high-precision industrial signal conditioning with 2-MHz bandwidth, 88-dB CMRR, and e-trim™ stability, while the INA137 is an audio-focused differential line receiver with ±6 dB gain (G = 0.5 or 2), optimized for 20–20 kHz bandwidth and THD+N <0.001%. The INA597IDGKT's wider bandwidth, lower drift, and industrial temp range make it unsuitable for audio line-receiving roles, and the INA137 lacks the DC precision and high-voltage tolerance needed for flow or motor feedback applications.
INA597IDGKT 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
INA597IDGKT FAQ
1.How can I place an order for INA597IDGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA597IDGKT 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 INA597IDGKT reliable?
The price and inventory of INA597IDGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA597IDGKT is usually 5 days.
3.What payment methods are accepted for INA597IDGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA597IDGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA597IDGKT?
INA597IDGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA597IDGKT 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 INA597IDGKT?
For technical support, including INA597IDGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA597IDGKT requirements.
6.How does Aetrix verify that INA597IDGKT is sourced from the original manufacturer or authorized distributors?
All INA597IDGKT 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 INA597IDGKT meets industry standards.
7.What is the process for return or replacement of INA597IDGKT?
All INA597IDGKT units undergo pre-shipment inspection (PSI). If there is an issue with INA597IDGKT, 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 INA597IDGKT part is unused and in its original packaging.
Return procedure for INA597IDGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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