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Texas Instruments OPA170AIDR
- Part No.:
- OPA170AIDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA170AIDR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,374
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Product details
Overview
OPA170AIDR from Texas Instruments is a single-channel, 36-V rail-to-rail output operational amplifier in SOIC-8 package, featuring 1.2 MHz gain bandwidth, 19 nV/√Hz input voltage noise, 110 µA quiescent current per amplifier, and input range extending to both supply rails - enabling precision signal conditioning in battery-powered instruments and transducer interfaces.
For engineers reviewing the OPA170AIDR datasheet, OPA170AIDR pinout, OPA170AIDR application, or OPA170AIDR equivalent, this page delivers verified specifications, SOIC-8 pin mapping, real-world use cases in bridge amplifiers and temperature measurement, and two validated alternative op amps with documented functional trade-offs.
Technical Context
The OPA170AIDR employs a CMOS input stage with phase-reversal protection, allowing inputs to operate 100 mV beyond the negative rail and within 2 V of the positive rail without output inversion. Its open-loop gain exceeds 110 dB across –40°C to +125°C, and it maintains stability with capacitive loads up to 300 pF.
It supports true single-supply operation from 2.7 V to 36 V (±1.35 V to ±18 V), with common-mode rejection of 120 dB at ±18 V and power-supply rejection of 104 dB - making it suitable for high-accuracy DC-coupled sensing where supply ripple and common-mode interference must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 36 V - enables direct interface with industrial 24-V rails and low-power 3.3-V microcontrollers without level-shifting. |
| Gain Bandwidth Product | 1.2 MHz - supports stable unity-gain buffer configurations and low-frequency precision filtering up to ~100 kHz. |
| Input Voltage Noise | 19 nV/√Hz at 1 kHz - ensures minimal added noise in strain gauge and thermocouple amplification chains. |
| Quiescent Current | 110 µA per amplifier - allows multi-channel sensor front-ends in energy-constrained portable equipment. |
| Input Bias Current | 15 pA max - preserves accuracy in high-impedance pH electrode or photodiode transimpedance circuits. |
| Rail-to-Rail Output Swing | Within 35 mV of rails at ±18 V - delivers full dynamic range into ADCs with 0–VREF input ranges. |
| Common-Mode Rejection | 120 dB at ±18 V - rejects coupled noise in differential sensor bridges operating near supply limits. |
Pinout & Package
OPA170AIDR is packaged in an 8-pin SOIC (D package) with nominal body size 4.90 mm × 3.91 mm and standard JEDEC MS-012AC footprint. Thermal resistance RθJA is 149.5°C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives loads up to 10 kΩ; rail-to-rail swing supports full-scale ADC interfacing. |
| 2 | IN– | Inverting input - accepts signals down to V– – 0.1 V; phase-reversal protected beyond linear range. |
| 3 | IN+ | Noninverting input - same rail-to-rail common-mode capability as IN–; low bias current preserves high-Z node integrity. |
| 4 | V– | Negative supply terminal - referenced to system ground in single-supply configs; supports true 0-V input operation. |
| 5 | NC | No internal connection - must be left floating; not tied to substrate or thermal pad. |
| 6 | NC | No internal connection - electrically isolated; no routing or grounding required. |
| 7 | V+ | Positive supply terminal - accepts up to 36 V; internal ESD protection rated to ±4 kV HBM. |
| 8 | NC | No internal connection - unused pin; no electrical function or thermal role. |
Key Features
| Feature | Design Value |
|---|---|
| RFI-filtered inputs | Integrated RF suppression enables reliable operation in noisy industrial environments with motor drives or switching power supplies. |
| Input range includes negative supply | Operates with inputs down to V– – 0.1 V - eliminates need for negative bias in single-supply transducer interfaces. |
| Rail-to-rail output | Delivers >99% of supply rail-to-rail swing at 1-mA load - maximizes SNR when driving SAR or delta-sigma ADCs. |
| Low quiescent current | 110 µA per amplifier at 25°C - enables always-on sensor monitoring in battery-powered IoT nodes with multi-year runtime. |
| High CMRR (120 dB) | Maintains accuracy in bridge-based sensors under varying common-mode voltages - critical for load cell and pressure transducers. |
Applications
| Bridge Amplifier | Temperature Measurement |
|---|---|
Use Scenario: Amplifying low-level differential output from a Wheatstone bridge in a load cell or pressure sensor. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with matched input impedance and ultra-low bias current. Use Value: 15 pA max input bias current prevents offset drift in high-resistance bridge arms; 120 dB CMRR rejects supply-induced common-mode error. |
Use Scenario: Signal conditioning for RTD or thermistor circuits in HVAC or industrial process control. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail output buffer for 2-/3-/4-wire RTD configurations with excitation current sourcing. Use Value: 19 nV/√Hz noise floor preserves resolution in 0.1°C temperature measurements; 2.7–36 V supply range accommodates 3.3-V MCU and 24-V field bus. |
| Strain Gauge Amplifier | Battery-Powered Instrument |
Use Scenario: Amplifying microvolt-level outputs from bonded foil or semiconductor strain gauges in structural health monitoring. IC Role / Device Role / Timing Role: High-input-impedance, low-drift gain stage with phase-reversal immunity during overvoltage transients. Use Value: Input operates to V– – 0.1 V and V+ – 2 V - avoids clipping during mechanical shock-induced rail excursions; 0.3 µV/°C typical drift ensures <1 µV error over 50°C span. |
Use Scenario: Front-end analog signal chain in handheld multimeters, portable data loggers, or wearable biosensors. IC Role / Device Role / Timing Role: Low-power, precision op amp for sensor buffering, filtering, and ADC driver stages. Use Value: 110 µA quiescent current extends coin-cell life to >5 years in sleep-mode logging; SOIC-8 allows manual rework and test probe access. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA192IDR | Higher precision: 5 µV max VOS, 0.2 µV/°C drift, but 1 mA IQ - 9× higher quiescent current than OPA170AIDR. | Better for lab-grade instrumentation; unsuitable for battery life-critical designs. | Choose OPA192IDR only when offset drift dominates power budget constraints. |
| TLV9061IDBVR | Lower voltage range (1.8–5.5 V), 10 MHz GBW, 550 µA IQ; optimized for 3.3-V systems, not 24-V industrial rails. | Designed for low-voltage portable electronics; lacks 36-V tolerance and rail-to-rail input. | Select TLV9061IDBVR only in space-constrained, low-voltage applications where 36-V operation is unnecessary. |
Compared with OPA170AIDR, OPA192IDR trades 9× higher supply current for sub-µV offset stability, while TLV9061IDBVR sacrifices 36-V capability and rail-to-rail input for speed and small SOT-23-5 packaging - making OPA170AIDR the optimal balance of voltage range, precision, and ultra-low power in industrial sensor front-ends.
Availability
OPA170AIDR is available at Aetrix Electronics and suitable for bridge amplifiers, temperature measurement systems, and battery-powered instruments requiring stable component supply across extended temperature ranges (–40°C to +125°C) and long production lifecycles.
Supply support for OPA170AIDR 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 op amps, data converters, and power management ICs.
The OPAx170 series was designed for cost-sensitive, high-reliability industrial and instrumentation applications demanding wide supply range, rail-to-rail performance, and robust ESD/overstress protection - all in industry-standard packages.
FAQ
What is the maximum supply voltage rating for OPA170AIDR?
The absolute maximum supply voltage for OPA170AIDR is 40 V, but the recommended operating range is 2.7 V to 36 V. Operation above 36 V risks exceeding safe junction temperature or violating reliability limits, even if within absolute max ratings. Always refer to TI's SBOS557E datasheet Section 7.1 for derating guidance.
Does OPA170AIDR support true rail-to-rail input operation?
OPA170AIDR supports rail-to-rail *output*, but its input common-mode range extends to V– – 0.1 V and V+ – 2 V - not full rail-to-rail input. It can accept inputs 100 mV beyond the negative rail, but performance degrades within 2 V of the positive rail. Full rail-to-rail input requires alternate devices like OPA189.
Can OPA170AIDR drive capacitive loads reliably?
Yes - OPA170AIDR is specified to remain stable with capacitive loads up to 300 pF, as confirmed in TI's SBOS557E datasheet Section 8.3.2. For loads >300 pF, external isolation resistance (e.g., 10–100 Ω in series with output) is recommended to maintain phase margin and prevent peaking.
What is the thermal resistance (RθJA) of OPA170AIDR in SOIC-8 package?
The junction-to-ambient thermal resistance (RθJA) for OPA170AIDR in the D (SOIC-8) package is 149.5°C/W, per TI's SBOS557E datasheet Table 7.4. This value assumes standard JEDEC 2S2P board layout; actual thermal performance improves with copper pour and thermal vias.
Is OPA170AIDR pin-compatible with other members of the OPAx170 family?
No - OPA170AIDR (single, SOIC-8) is not pin-compatible with OPA2170 (dual) or OPA4170 (quad), nor with OPA170 variants in SOT-23-5 or SOT553 packages. Pin count, pin functions, and package footprints differ across variants; PCB layout must match the exact orderable part number.
OPA170AIDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- 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
- Current - Output / Channel:
- 17 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-SOIC
OPA170AIDR FAQ
1.How can I place an order for OPA170AIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA170AIDR 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 OPA170AIDR reliable?
The price and inventory of OPA170AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA170AIDR is usually 5 days.
3.What payment methods are accepted for OPA170AIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA170AIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA170AIDR?
OPA170AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA170AIDR 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 OPA170AIDR?
For technical support, including OPA170AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA170AIDR requirements.
6.How does Aetrix verify that OPA170AIDR is sourced from the original manufacturer or authorized distributors?
All OPA170AIDR 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 OPA170AIDR meets industry standards.
7.What is the process for return or replacement of OPA170AIDR?
All OPA170AIDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA170AIDR, 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 OPA170AIDR part is unused and in its original packaging.
Return procedure for OPA170AIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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