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Texas Instruments OPA2197ID
- Part No.:
- OPA2197ID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2197ID.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:471
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Product details
Overview
OPA2197ID from Texas Instruments is a dual-channel, 36-V precision rail-to-rail input/output operational amplifier optimized for high-voltage industrial signal conditioning. It delivers ±100 µV max input offset voltage, 10-MHz gain-bandwidth, 20 V/µs slew rate, and ±65 mA output drive - enabling accurate sensor interfacing in multiplexed data-acquisition systems and high-side current sensing applications.
For engineers reviewing the OPA2197ID datasheet, OPA2197ID pinout, OPA2197ID application, or OPA2197ID equivalent, this page provides verified specifications, package-confirmed pin functions, real-world use cases, and validated alternative options for precision analog design under ±18 V or +36 V single-supply operation.
Technical Context
The OPA2197ID integrates two matched, high-precision op-amp cores sharing common supply rails (V+ and V−), each with independent differential inputs and rail-to-rail output stages. Its architecture supports full rail-to-rail common-mode input range - including beyond the rails by up to 0.1 V - and maintains 120 dB minimum CMRR across –40°C to +125°C.
It features EMI/RFI-filtered inputs, differential input voltage tolerance to supply rails, and robust capacitive load drive capability up to 1 nF without external compensation - making it suitable for direct connection to ADC drivers, reference buffers, and high-impedance sensor front-ends in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±100 µV maximum - ensures ≤0.1 mV error at unity gain in 10 V full-scale systems |
| Gain-Bandwidth Product | 10 MHz - supports stable closed-loop gain ≥10 at 1 MHz for anti-aliasing filter interfaces |
| Slew Rate | 20 V/µs - enables clean 10-V step response in <1.4 µs to 0.01% settling |
| Common-Mode Rejection | 120 dB minimum - suppresses >100,000:1 of power-supply or ground-noise coupling |
| Supply Range | ±2.25 V to ±18 V or +4.5 V to +36 V - compatible with legacy ±15 V and modern 24 V industrial rails |
| Output Drive | ±65 mA short-circuit current - drives 2-kΩ loads to within 500 mV of rails, supporting active filtering stages |
| Input Bias Current | ±5 pA typical - preserves accuracy in high-impedance thermocouple or bridge sensor interfaces |
Pinout & Package
OPA2197ID is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.90 mm, rated for operation from –40°C to +125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | Accepts signals up to (V+) + 0.1 V; enables high-side sensing with VCM beyond positive rail |
| –IN A (Pin 2) | Inverting input, Channel A | Differential pair input node; supports rail-to-rail common-mode range down to (V–) – 0.1 V |
| OUT A (Pin 1) | Output, Channel A | Rail-to-rail output stage capable of sourcing/sinking ±65 mA into resistive or 1-nF capacitive loads |
| V– (Pin 4) | Negative supply | Lowest potential supply terminal; must be connected before applying input signals |
| V+ (Pin 8) | Positive supply | Highest potential supply terminal; powers both amplifiers and sets common-mode operating window |
| +IN B (Pin 5) | Noninverting input, Channel B | Independent input for second channel; electrically isolated from Channel A except via shared supplies |
| –IN B (Pin 6) | Inverting input, Channel B | Second differential input pair; matches Channel A performance across temperature and supply |
| OUT B (Pin 7) | Output, Channel B | Separate output driver with identical AC/DC specs as OUT A; no crosstalk above –100 dB at 1 kHz |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization in single-supply 24 V systems without level-shifting circuitry |
| Differential input voltage range to supply rail | Permits overvoltage tolerant front-end design - e.g., direct connection to ±10 V sensor outputs with ±18 V supplies |
| EMI- and RFI-filtered inputs | Reduces susceptibility to 30–1000 MHz noise in factory-floor PLC and motor-control enclosures |
| High capacitive load drive (1 nF) | Eliminates need for isolation resistors when driving SAR ADC input capacitance or long PCB traces |
| Low offset drift (±2.5 µV/°C max) | Maintains calibration stability across industrial temperature range without periodic zeroing |
Applications
| Multiplexed Data-Acquisition System | High-Side Current Sensing |
|---|---|
Use Scenario: 16-channel, 18-bit SAR ADC system with analog multiplexer selecting between RTD, thermocouple, and strain gauge inputs. IC Role / Device Role / Timing Role: Precision buffer and gain stage preceding multiplexer; rejects crosstalk and maintains signal integrity during channel switching. Use Value: ±100 µV offset and 120 dB CMRR prevent channel-to-channel gain/offset errors; rail-to-rail I/O supports unipolar 0–5 V ADC input range. | Use Scenario: Real-time monitoring of motor phase current using shunt resistor placed between power rail and load. IC Role / Device Role / Timing Role: High-common-mode-voltage difference amplifier front-end, referenced to 24 V rail. Use Value: Input common-mode range extends to (V+) + 0.1 V, allowing direct sensing at 24 V with ±18 V supplies; 20 V/µs slew rate captures fast current transients. |
| SAR ADC Reference Buffer | Programmable Logic Controller Analog Input Module |
Use Scenario: Driving internal reference voltage (e.g., REF3140) into 10 µF decoupling capacitor and ADC reference pin. IC Role / Device Role / Timing Role: Low-noise, high-current buffer isolating reference source from switching noise and load variations. Use Value: 5.5 nV/√Hz noise and ±65 mA drive ensure stable 4.096 V reference under dynamic ADC conversion loads; no external compensation needed. | Use Scenario: Signal conditioning stage in modular I/O card accepting 0–20 mA, ±10 V, or thermocouple inputs across multiple channels. IC Role / Device Role / Timing Role: Dual-channel configurable amplifier supporting programmable gain (1×, 2×, 5×, 10×) and filtering per channel. Use Value: Matched dual topology ensures consistent channel performance; ±2.5 µV/°C drift minimizes inter-channel thermal mismatch over operating temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2182IDR | Lower offset (±4 µV typ), lower noise (3.4 nV/√Hz), but narrower supply range (±2.25 V to ±18 V only) | Better for ultra-high-resolution metrology; less suitable for +36 V single-supply systems | Select OPA2182IDR when sub-10 µV offset and <4 nV/√Hz noise are mandatory, and supply is limited to ±18 V |
| AD8638ARZ-REEL | Higher offset (±125 µV max), lower bandwidth (3.5 MHz), but superior zero-drift architecture over time | Preferred for long-term DC stability in battery-powered instrumentation where aging matters more than speed | Select AD8638ARZ-REEL for applications requiring <0.05 µV/°C long-term drift, even at cost of bandwidth and drive strength |
Compared with OPA2197ID, OPA2182IDR offers superior DC precision and noise but sacrifices single-supply 36 V operation, while AD8638ARZ-REEL trades speed and output drive for exceptional long-term offset stability - making OPA2197ID the balanced choice for industrial multiplexed DAQ and high-voltage sensor signal chains.
Availability
OPA2197ID is available at Aetrix Electronics and suitable for multiplexed data-acquisition systems, high-side current sensing circuits, and SAR ADC reference buffering requiring stable component supply across extended temperature and voltage ranges.
Supply support for OPA2197ID 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.
The OPA2197ID belongs to TI's OPAx197 family of 36-V precision op-amps, engineered for high-voltage industrial signal conditioning - specifically targeting applications demanding rail-to-rail operation, low drift, and robust EMI immunity in harsh environments.
FAQ
What is the maximum supply voltage for OPA2197ID?
The OPA2197ID supports dual supplies from ±2.25 V to ±18 V or a single supply from +4.5 V to +36 V. Absolute maximum ratings specify ±20 V for dual supply and 40 V for single supply, but continuous operation beyond ±18 V or +36 V is not recommended. The device is fully specified and characterized across its recommended operating range, including performance metrics like offset voltage and CMRR at ±18 V.
Does OPA2197ID support rail-to-rail input and output?
Yes, OPA2197ID supports true rail-to-rail input and output operation. Its input common-mode range extends from (V–) – 0.1 V to (V+) + 0.1 V, and its output swings to within 25 mV of each rail under no-load conditions. This allows full utilization of supply headroom in both single- and dual-supply configurations - critical for maximizing dynamic range in 24 V industrial systems and low-voltage precision designs alike.
Can OPA2197ID drive a 1-nF capacitive load directly?
Yes, OPA2197ID is explicitly characterized for stable operation driving up to 1 nF capacitive loads without external compensation. This capability is confirmed in the datasheet's Typical Characteristics section (Figures 27–28) and enables direct interface with SAR ADC input capacitance, long PCB traces, or local decoupling networks - eliminating series isolation resistors and associated signal degradation in high-fidelity analog signal paths.
What is the input bias current specification for OPA2197ID?
The input bias current for OPA2197ID is ±5 pA typical and ±20 pA maximum at 25°C, with ±5 nA maximum over the full –40°C to +125°C temperature range. This ultra-low bias current ensures minimal voltage error in high-impedance sensor interfaces such as thermocouples, piezoresistive bridges, or pH electrodes - preserving measurement accuracy without requiring guard traces or active bias cancellation networks.
Is OPA2197ID pin-compatible with other devices in the OPAx197 family?
OPA2197ID shares identical pinout and footprint with OPA2197 in VSSOP-8 (DGK) and SOIC-8 (D) packages, but is not pin-compatible with OPA197 (single-channel) or OPA4197 (quad-channel) due to differing channel count and pin assignments. Within the dual-channel variants, OPA2197ID (SOIC-8) and OPA2197DGKR (VSSOP-8) maintain functional and mechanical compatibility - enabling drop-in replacement when board layout accommodates the 4.90 mm × 3.90 mm SOIC outline.
OPA2197ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 20V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 pA
- Voltage - Input Offset:
- 25 µV
- Current - Supply:
- 1mA (x2 Channels)
- Current - Output / Channel:
- 65 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA2197ID FAQ
1.How can I place an order for OPA2197ID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2197ID 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 OPA2197ID reliable?
The price and inventory of OPA2197ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2197ID is usually 5 days.
3.What payment methods are accepted for OPA2197ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2197ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2197ID?
OPA2197ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2197ID 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 OPA2197ID?
For technical support, including OPA2197ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2197ID requirements.
6.How does Aetrix verify that OPA2197ID is sourced from the original manufacturer or authorized distributors?
All OPA2197ID 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 OPA2197ID meets industry standards.
7.What is the process for return or replacement of OPA2197ID?
All OPA2197ID units undergo pre-shipment inspection (PSI). If there is an issue with OPA2197ID, 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 OPA2197ID part is unused and in its original packaging.
Return procedure for OPA2197ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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