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Texas Instruments OPA2170AIDGK
- Part No.:
- OPA2170AIDGK
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2170AIDGK.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:448
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Product details
Overview
OPA2170AIDGK from Texas Instruments is a dual-channel, 36-V, rail-to-rail output operational amplifier in an 8-pin VSSOP package, featuring 1.2 MHz gain bandwidth, 19 nV/√Hz input voltage noise at 1 kHz, 110 µA per amplifier quiescent current, and rail-to-rail input operation extending 100 mV beyond the negative supply and within 2 V of the positive supply. It serves precision signal conditioning in battery-powered instrumentation and transducer interfaces.
For engineers reviewing the OPA2170AIDGK datasheet, OPA2170AIDGK pinout, OPA2170AIDGK application, or OPA2170AIDGK equivalent, key selection criteria include low-power operation across wide supply range (2.7 V to 36 V), high CMRR (120 dB), ultra-low input bias current (15 pA max), and phase-reversal immunity for robust performance in industrial sensor front-ends.
Technical Context
The OPA2170AIDGK employs a bipolar input stage with RFI-filtered inputs and internal phase-reversal protection, enabling stable operation when common-mode voltage exceeds the specified linear range. Its open-loop gain exceeds 110 dB over –40°C to +125°C, supporting high-accuracy closed-loop configurations.
It delivers rail-to-rail output swing (within 115 mV of rails at 1 mA load) and operates with capacitive loads up to 300 pF without compensation. Input common-mode range spans (V–) – 0.1 V to (V+) – 2 V, with full rail-to-rail capability extended 100 mV beyond V+ at reduced performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 36 V (±1.35 V to ±18 V): Enables single-supply operation in 3.3 V, 5 V, 12 V, and 24 V systems without level-shifting. |
| Gain Bandwidth Product | 1.2 MHz: Supports stable unity-gain and moderate-gain signal amplification up to ~1 MHz with minimal phase margin loss. |
| Input Voltage Noise | 19 nV/√Hz at 1 kHz: Low-noise performance suitable for strain gauge and thermocouple amplification where signal integrity is critical. |
| Quiescent Current | 110 µA per amplifier (typ): Enables dual-channel precision amplification in battery-powered devices with multi-year runtime. |
| Input Bias Current | 15 pA (max) at 25°C: Minimizes voltage error in high-impedance sensor interfaces (e.g., pH electrodes, piezoresistive sensors). |
| Common-Mode Rejection | 120 dB at ±18 V: Rejects power supply ripple and ground noise in noisy industrial environments with high common-mode interference. |
| Rail-to-Rail Output | Swings within 115 mV of V+ and 70 mV of V– at 1 mA load: Maximizes dynamic range in low-voltage data acquisition systems. |
Pinout & Package
OPA2170AIDGK is housed in an 8-pin VSSOP (DGK) package measuring 3.00 mm × 3.00 mm with 0.65 mm pitch, optimized for space-constrained PCB layouts while maintaining thermal performance (RθJA = 180°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Output of amplifier channel A; drives external load or next-stage input with rail-to-rail swing capability. |
| 2 | –IN A | Inverting input of channel A; accepts feedback network connection for precise gain control in inverting configurations. |
| 3 | +IN A | Noninverting input of channel A; connects directly to high-impedance sensor sources with minimal loading error. |
| 4 | V– | Negative supply rail; must be connected to system ground or negative reference for proper biasing and output swing. |
| 5 | +IN B | Noninverting input of channel B; electrically isolated from channel A, enabling independent dual-signal processing. |
| 6 | –IN B | Inverting input of channel B; supports differential or inverting configurations without crosstalk to channel A. |
| 7 | OUT B | Output of amplifier channel B; provides second independent analog path for dual-channel sensing or signal routing. |
| 8 | V+ | Positive supply rail; supplies operating power; supports up to 36 V, enabling direct interface with industrial power rails. |
Key Features
| Feature | Design Value |
|---|---|
| RFI-filtered inputs | Integrated RC filtering suppresses high-frequency electromagnetic interference from switching power supplies or RF sources. |
| Phase-reversal protection | Prevents output inversion when input exceeds common-mode range-critical for noninverting circuits in fault-prone environments. |
| Rail-to-rail input (extended) | Operates 100 mV below V– and up to V+ (with performance trade-off within 2 V of V+), simplifying level-shifting in single-supply designs. |
| Stable with 300 pF load | Eliminates need for external isolation resistors when driving ADC inputs or long traces, reducing component count and board area. |
| –40°C to +125°C operation | Qualified for automotive under-hood, industrial motor control, and outdoor instrumentation without derating. |
Applications
| Transducer Amplifier | Bridge Amplifier |
|---|---|
|
Use Scenario: Amplifying low-level mV outputs from pressure or force sensors in HVAC controllers and industrial weighing systems. IC Role / Device Role / Timing Role: Dual-channel OPA2170AIDGK configures one amplifier as precision instrumentation amplifier front-end and the other as reference buffer or signal conditioning stage. Use Value: 15 pA input bias current prevents offset drift in high-resistance Wheatstone bridge arms; 19 nV/√Hz noise preserves SNR for sub-16-bit resolution. |
Use Scenario: Signal conditioning for full-bridge strain gauges in structural health monitoring and load-cell interfaces. IC Role / Device Role / Timing Role: Configured in dual-op-amp instrumentation topology (gain = 1 + 2RF/RG) with matched channels minimizing gain mismatch-induced errors. Use Value: 120 dB CMRR rejects common-mode noise from bridge excitation; rail-to-rail output maximizes ADC utilization in 3.3 V microcontroller systems. |
| Temperature Measurement | Battery-Powered Instrumentation |
|
Use Scenario: Linearizing and amplifying RTD or thermistor signals in portable environmental monitors and medical thermometers. IC Role / Device Role / Timing Role: One channel buffers PT100 excitation current source; the other performs precision difference amplification of ratiometric voltage outputs. Use Value: 2.7 V minimum supply enables direct use with Li-ion (3.0–4.2 V) or two-AA (2.4–3.2 V) batteries; 110 µA per amplifier extends battery life. |
Use Scenario: Analog front-end for handheld multimeters, portable gas detectors, and field calibration tools. IC Role / Device Role / Timing Role: Dual op-amps implement programmable gain stage and anti-aliasing filter before SAR ADC sampling. Use Value: 36 V absolute max rating protects against accidental 24 V supply misconnection; 1.2 MHz GBW supports fast settling for 100 kSPS sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2182AIDGKT | Lower offset drift (0.012 µV/°C vs. ±0.3 µV/°C), higher precision (±5 µV offset), but 175 µA IQ and 10 MHz GBW. | Better for metrology-grade DC accuracy; less suitable for ultra-low-power battery operation. | Select OPA2182AIDGKT only when sub-µV drift dominates over quiescent current budget. |
| LMV358IDGKR | Lower voltage range (2.7–5.5 V), higher IQ (150 µA), no phase-reversal protection, 1 MHz GBW, 35 nV/√Hz noise. | Cost-optimized for consumer-grade 3.3 V systems; not rated for industrial temperature or 36 V operation. | Choose LMV358IDGKR only for non-critical, low-voltage, cost-sensitive applications where 125°C operation is unnecessary. |
Compared with OPA2170AIDGK, OPA2182AIDGKT trades 60% higher quiescent current for 25× lower drift, while LMV358IDGKR sacrifices 36 V tolerance, phase-reversal immunity, and noise performance to reduce cost-making OPA2170AIDGK the balanced choice for industrial-grade dual-channel precision at low power.
Availability
OPA2170AIDGK is available at Aetrix Electronics and suitable for transducer amplifiers, bridge circuits, temperature measurement systems, and battery-powered instrumentation requiring stable component supply across extended temperature and voltage ranges.
Supply support for OPA2170AIDGK 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, with over 50 years of innovation in precision analog ICs and broad industrial portfolio coverage.
The OPAx170 series was designed for general-purpose, low-power, high-precision signal conditioning in industrial, test, and portable equipment-emphasizing wide supply range, rail-to-rail operation, and robustness in real-world EMI and overvoltage conditions.
FAQ
What is the maximum supply voltage for OPA2170AIDGK?
The OPA2170AIDGK supports an absolute maximum supply voltage of 40 V (V+ to V–), with recommended operation from 2.7 V to 36 V. Exceeding 36 V continuously may impact reliability, and operation above 40 V risks permanent damage per Absolute Maximum Ratings in the TI SBOS557E datasheet.
Does OPA2170AIDGK support rail-to-rail input operation?
Yes, OPA2170AIDGK supports rail-to-rail input operation: its common-mode range extends from (V–) – 0.1 V to (V+) – 2 V for full-spec performance, and it can operate up to V+ (with reduced performance within 2 V of V+). This eliminates need for level-shifting in single-supply systems.
Can OPA2170AIDGK drive capacitive loads without instability?
Yes, OPA2170AIDGK is stable driving capacitive loads up to 300 pF, as confirmed in the TI SBOS557E datasheet. This allows direct connection to ADC inputs, long PCB traces, or bypass capacitors without external isolation resistors or compensation networks.
What is the input bias current specification for OPA2170AIDGK?
The input bias current for OPA2170AIDGK is specified at ±15 pA maximum at 25°C and ±3.5 nA maximum over –40°C to +125°C. This ultra-low value minimizes voltage error in high-impedance sensor interfaces such as pH probes and photodiode transimpedance stages.
Is OPA2170AIDGK pin-compatible with other packages in the OPA2170 family?
No-OPA2170AIDGK uses the DGK (VSSOP-8) package, which has different pinout and footprint than SOIC-8 (D), micro-VSSOP-8 (DCU), or WSON-8 (DSG) variants. While electrical specifications are identical across packages, mechanical compatibility requires matching the specific package variant during PCB layout.
OPA2170AIDGK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.4V/µs
- Gain Bandwidth Product:
- 1.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 8 pA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 110µA (x2 Channels)
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2170AIDGK FAQ
1.How can I place an order for OPA2170AIDGK through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2170AIDGK 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 OPA2170AIDGK reliable?
The price and inventory of OPA2170AIDGK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2170AIDGK is usually 5 days.
3.What payment methods are accepted for OPA2170AIDGK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2170AIDGK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2170AIDGK?
OPA2170AIDGK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2170AIDGK 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 OPA2170AIDGK?
For technical support, including OPA2170AIDGK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2170AIDGK requirements.
6.How does Aetrix verify that OPA2170AIDGK is sourced from the original manufacturer or authorized distributors?
All OPA2170AIDGK 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 OPA2170AIDGK meets industry standards.
7.What is the process for return or replacement of OPA2170AIDGK?
All OPA2170AIDGK units undergo pre-shipment inspection (PSI). If there is an issue with OPA2170AIDGK, 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 OPA2170AIDGK part is unused and in its original packaging.
Return procedure for OPA2170AIDGK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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