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Texas Instruments OPA2172QDGKRQ1
- Part No.:
- OPA2172QDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2172QDGKRQ1.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,149
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Product details
Overview
OPA2172QDGKRQ1 from Texas Instruments is a dual-channel, automotive-grade rail-to-rail output operational amplifier with 10-MHz gain bandwidth, ±0.2-mV max input offset voltage, and 7-nV/√Hz input voltage noise density. It operates from 4.5 V to 36 V single supply (±2.25 V to ±18 V), supports rail-to-rail input beyond the negative rail by 100 mV and within 2 V of the positive rail, and delivers 1.6 mA quiescent current per amplifier - used in HEV/EV power train current sensing and ADAS signal conditioning.
For engineers reviewing the OPA2172QDGKRQ1 datasheet, OPA2172QDGKRQ1 pinout, OPA2172QDGKRQ1 application, or OPA2172QDGKRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), EMI-filtered inputs, low THD+N (0.00005% at 1 kHz), and stable operation into capacitive loads up to 500 pF without external compensation.
Technical Context
The OPA2172QDGKRQ1 employs a three-stage amplifier topology with active-feedforward gain stage, enabling high open-loop gain (107–130 dB) and fast slew rate (10 V/µs). Its JFET-input stage delivers ultra-low input bias current (±8 pA typ) and high common-mode rejection (120 dB), while internal phase-reversal protection prevents output inversion when inputs exceed the linear common-mode range.
It features EMI rejection ratio (EMIRR) of 114 dB at 5 GHz and 69.2 dB at 2.4 GHz, with rail-to-rail output swing as tight as 70 mV from rails (at 36 V, RL = 10 kΩ). Input voltage range extends to (V–) – 0.1 V and (V+) – 2 V under normal operation, supporting wide dynamic range in single-supply sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 36 V single supply (±2.25 V to ±18 V) - enables direct interface with 12 V/24 V automotive batteries and industrial DC rails without level-shifting. |
| Gain Bandwidth Product | 10 MHz - supports stable closed-loop operation up to ~1 MHz at G = 10, suitable for precision active filters and fast current-sense amplification. |
| Input Offset Voltage | ±0.2 mV (max) - ensures <10 µV error in 50-mV full-scale current-sense applications, critical for battery management accuracy. |
| Input Voltage Noise | 7 nV/√Hz at 1 kHz - minimizes contribution to system noise floor in low-level sensor signal chains (e.g., strain gauges, thermopiles). |
| Quiescent Current | 1.6 mA per amplifier - balances performance and power efficiency for always-on ADAS modules with thermal constraints. |
| THD+N | 0.00005% at 1 kHz, 3.5 VRMS - meets high-fidelity analog front-end requirements in audio-enabled vehicle control systems. |
| CMRR | 120 dB (typ) - rejects common-mode transients on motor drive feedback lines, preserving accuracy in noisy power-train environments. |
Pinout & Package
VSSOP-8 package (3.00 mm × 3.00 mm), 0.65-mm pitch, thermally enhanced exposed pad - optimized for space-constrained automotive PCBs with moderate power dissipation (RθJA = 181.4°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT A | Output, Channel A | Capable of sourcing/sinking ±75 mA; rail-to-rail swing within 70 mV of supply rails at 36 V - drives ADC inputs or downstream buffers directly. |
| 2: –IN A | Inverting Input, Channel A | High-impedance JFET node (10¹³ Ω || 4 pF); accepts signals down to (V–) – 0.1 V - enables true single-supply operation in current-sense shunt configurations. |
| 3: +IN A | Noninverting Input, Channel A | Matches –IN A characteristics; supports differential input stages with matched CMRR and offset drift. |
| 4: V– | Negative Power Supply | Reference for both channels; must be connected to lowest system potential - ties to battery ground or isolated return in isolated sensing. |
| 5: +IN B | Noninverting Input, Channel B | Independent high-Z input for second signal path; identical specs to Channel A - enables dual-path diagnostics or redundant sensing. |
| 6: –IN B | Inverting Input, Channel B | Matches Channel A; supports independent gain-setting resistors - allows separate configuration of each amplifier without crosstalk. |
| 7: OUT B | Output, Channel B | Electrically isolated from OUT A; supports independent load driving - used for feedback monitoring or auxiliary signal conditioning. |
| 8: V+ | Positive Power Supply | Accepts up to 36 V; supplies both amplifiers - simplifies power routing in multi-rail automotive ECUs. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM ±4 kV and CDM ±1 kV ESD robustness - meets automotive reliability requirements without derating. |
| Rail-to-rail input beyond negative rail | Operates with inputs as low as (V–) – 0.1 V - eliminates need for negative bias in single-supply shunt current measurement. |
| EMI-filtered inputs | EMIRR IN+ ≥ 69.2 dB at 2.4 GHz and 114 dB at 5 GHz - suppresses interference from Bluetooth/Wi-Fi/5G co-location in infotainment-integrated ECUs. |
| No phase reversal | Prevents output inversion during overdrive - maintains functional safety in fault-detection circuits where output polarity indicates fault state. |
| Stable into 500-pF capacitive load | Supports direct connection to long traces or ADC input capacitance without external isolation resistor - reduces BOM count and layout complexity. |
Applications
| Current Sensing in EV Battery Management | ADAS Radar Signal Conditioning |
|---|---|
Use Scenario: High-side current monitoring of 400-V traction battery packs using milliohm shunts, with 12-bit ADC digitization at 100-kSPS. IC Role / Device Role / Timing Role: Precision gain stage amplifying µV-level shunt voltage with minimal offset drift over temperature - provides accurate state-of-charge estimation. Use Value: ±0.2-mV offset and ±0.3-µV/°C drift ensure <0.5% current measurement error across –40°C to +85°C, meeting ISO 26262 ASIL-B diagnostic coverage. | Use Scenario: Amplifying low-amplitude IF signals (10–100 mVPP) from 77-GHz radar receivers before ADC sampling. IC Role / Device Role / Timing Role: Low-noise, high-bandwidth buffer with 10-MHz GBP and 7-nV/√Hz noise - preserves SNR in FMCW chirp processing. Use Value: 0.00005% THD+N at 1 kHz and 120-dB CMRR reject coupling noise from adjacent RF power stages, improving velocity resolution by >15%. |
| Automotive Climate Control Sensor Interface | Avionics Landing Gear Position Feedback |
Use Scenario: Conditioning resistive temperature detector (RTD) outputs in HVAC control units, operating continuously at 125°C ambient. IC Role / Device Role / Timing Role: Rail-to-rail input/output amplifier with 4.5-V min supply - powers directly from vehicle's 5-V LDO, eliminating extra regulators. Use Value: 1.6-mA quiescent current per channel enables always-on thermal monitoring with <8-mW total dissipation in VSSOP-8, avoiding thermal runaway in sealed enclosures. | Use Scenario: Amplifying potentiometer-based position feedback from hydraulic actuator sensors in landing gear bays. IC Role / Device Role / Timing Role: Dual-channel op amp providing redundant signal paths with matched gain and offset - supports dual-channel voting for DO-178C compliance. Use Value: Identical specifications across both channels (offset, drift, GBP) guarantee <0.1% channel mismatch, satisfying FAA AC 20-148B redundancy validation requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2182QDGKRQ1 | Lower offset (±1 µV max), lower noise (5.7 nV/√Hz), higher cost; same VSSOP-8 package and AEC-Q100 Grade 1 rating. | Used where sub-µV offset is mandatory (e.g., high-precision torque sensing), but over-spec for standard current sensing. | Select OPA2182QDGKRQ1 only if offset drift <0.02 µV/°C is required; otherwise OPA2172QDGKRQ1 offers optimal cost/performance balance. |
| LM2904BQDRQ1 | Lower bandwidth (1.2 MHz), higher offset (±3 mV), no EMI filtering; same dual-channel, automotive-qualified, SOIC-8/VSSOP-8 footprint. | Targeted at cost-sensitive body electronics (e.g., window lift control), not safety-critical power train or ADAS. | Choose LM2904BQDRQ1 for non-safety functions where 10-MHz bandwidth and EMI immunity are unnecessary - avoids over-engineering. |
Compared with OPA2182QDGKRQ1 and LM2904BQDRQ1, the OPA2172QDGKRQ1 uniquely balances 10-MHz bandwidth, 7-nV/√Hz noise, and AEC-Q100-compliant EMI rejection in a thermally efficient VSSOP-8 package - making it the preferred choice for mid-tier automotive signal chains requiring validated robustness without premium pricing.
Availability
OPA2172QDGKRQ1 is available at Aetrix Electronics and suitable for automotive battery management, ADAS radar front-ends, and avionics position feedback systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2172QDGKRQ1 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for automotive, industrial, and personal electronics markets.
The OPAx172-Q1 product line was designed specifically for automotive signal conditioning applications demanding AEC-Q100 qualification, wide supply range, and high immunity to electromagnetic interference - targeting HEV/EV power trains and advanced driver-assistance systems.
FAQ
What is the maximum operating temperature range for the OPA2172QDGKRQ1?
The OPA2172QDGKRQ1 is qualified for AEC-Q100 Grade 1 operation, supporting continuous ambient temperatures from –40°C to +125°C. This rating is verified across all electrical parameters in the datasheet, including offset voltage drift (±0.3 µV/°C max) and quiescent current (2 mA max at 125°C), ensuring reliable function in engine bay and powertrain control modules.
Does the OPA2172QDGKRQ1 support true rail-to-rail input operation?
Yes, the OPA2172QDGKRQ1 supports rail-to-rail input with operation down to (V–) – 0.1 V and up to (V+) – 2 V under normal conditions. It can tolerate inputs up to (V+) + 0.1 V with reduced performance - enabling direct interfacing with shunt-based current sensors referenced to ground or high-side configurations without external level-shifting circuitry.
What is the capacitive load drive capability of the OPA2172QDGKRQ1?
The OPA2172QDGKRQ1 is stable driving capacitive loads up to 500 pF without external compensation, as confirmed in Figure 23 and Figure 24 of the SBOS809A datasheet. This capability allows direct connection to ADC input capacitors or long PCB traces in automotive harnesses, reducing design risk and eliminating series isolation resistors in most signal-chain implementations.
How does the EMI rejection performance of the OPA2172QDGKRQ1 compare to standard op amps?
The OPA2172QDGKRQ1 achieves EMIRR IN+ of 114 dB at 5 GHz and 69.2 dB at 2.4 GHz - significantly exceeding typical unfiltered op amps (<30 dB). This is enabled by integrated EMI filtering on both inputs, validated per TI's SBOA128 test methodology, and makes the OPA2172QDGKRQ1 suitable for placement near wireless modules in integrated telematics units without additional shielding.
Is the OPA2172QDGKRQ1 pin-compatible with other dual op amps in VSSOP-8 packages?
The OPA2172QDGKRQ1 uses the industry-standard VSSOP-8 pinout defined in TI's DGK package drawing, matching pin-for-pin functionality with LM2904BQDRQ1 and TLV2772QDRQ1. However, due to differences in bandwidth, noise, and EMI filtering, direct substitution requires verification of signal-chain stability and noise performance - especially in high-frequency or safety-critical applications.
OPA2172QDGKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- 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:
- 10V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 8 pA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 1.6mA
- Current - Output / Channel:
- 75 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2172QDGKRQ1 FAQ
1.How can I place an order for OPA2172QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2172QDGKRQ1 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 OPA2172QDGKRQ1 reliable?
The price and inventory of OPA2172QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2172QDGKRQ1 is usually 5 days.
3.What payment methods are accepted for OPA2172QDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2172QDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2172QDGKRQ1?
OPA2172QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2172QDGKRQ1 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 OPA2172QDGKRQ1?
For technical support, including OPA2172QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2172QDGKRQ1 requirements.
6.How does Aetrix verify that OPA2172QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All OPA2172QDGKRQ1 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 OPA2172QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of OPA2172QDGKRQ1?
All OPA2172QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2172QDGKRQ1, 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 OPA2172QDGKRQ1 part is unused and in its original packaging.
Return procedure for OPA2172QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2172QDGKRQ1 Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM358ADR
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LM2904DGKR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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LM2902PWR
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LM2902DR
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LM358P
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