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Texas Instruments OPA2172IDGKR
- Part No.:
- OPA2172IDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2172IDGKR.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,922
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Product details
Overview
OPA2172IDGKR from Texas Instruments is a dual, rail-to-rail output, 36-V CMOS operational amplifier optimized for precision signal conditioning in industrial and test equipment. It delivers ±0.2 mV offset voltage, 10 MHz gain bandwidth, 7 nV/√Hz input voltage noise, and operates from ±2.25 V to ±18 V supplies. Used in bridge amplifier circuits and transducer interfaces where low distortion and wide supply range are critical.
For engineers reviewing the OPA2172IDGKR datasheet, OPA2172IDGKR pinout, OPA2172IDGKR application, or OPA2172IDGKR equivalent, this page provides verified specifications, SOIC-8 package details, dual-channel functional context, thermal performance data, and validated alternative options for high-voltage precision amplification designs.
Technical Context
The OPA2172IDGKR implements a high-voltage CMOS input stage with rail-to-rail output swing, enabling full-scale signal handling across its +4.5 V to +36 V single-supply or ±2.25 V to ±18 V dual-supply range. Its input operates 100 mV below V– and within 2 V of V+, eliminating phase reversal under overdrive.
It features EMI/RFI-filtered inputs, 120 dB common-mode rejection at DC, and 107–115 dB open-loop gain over –40°C to +125°C. The device maintains 0.00005% THD+N at 1 kHz (3.5 VRMS output) and settles to 0.1% in 2 µs with 10-V step response.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | +4.5 V to +36 V single-supply; ±2.25 V to ±18 V dual-supply - supports wide industrial power rails without level-shifting. |
| Gain Bandwidth | 10 MHz - enables stable unity-gain and higher closed-loop configurations up to ~1 MHz with 60° phase margin. |
| Input Offset Voltage | ±0.2 mV (typ), ±1.15 mV (max over temp) - reduces DC error in precision gain stages and sensor front-ends. |
| Input Voltage Noise | 7 nV/√Hz @ 1 kHz - preserves SNR in low-level signal amplification (e.g., strain gauges, thermopiles). |
| Output Swing | Within 70 mV of rails (RL = 10 kΩ, VS = +36 V) - maximizes dynamic range in single-supply data acquisition systems. |
| Quiescent Current | 1.6 mA per amplifier - balances speed and power efficiency for dual-channel applications requiring <3.2 mA total. |
| THD+N | 0.00005% @ 1 kHz, 3.5 VRMS - meets audio-grade and high-fidelity test equipment requirements. |
Pinout & Package
OPA2172IDGKR is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, rated for operation from –40°C to +125°C. Thermal resistance RθJA is 116.1°C/W, supporting moderate-power dissipation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads up to ±75 mA short-circuit current; rail-to-rail swing enables full utilization of supply. |
| 2 | –IN A | Inverting input, channel A - high-impedance CMOS node (10¹³ Ω || 4 pF); accepts signals down to V– – 0.1 V. |
| 3 | +IN A | Noninverting input, channel A - matched to –IN A; supports common-mode range extending to V+ – 2 V. |
| 4 | V– | Negative supply terminal - reference for both amplifiers; must be connected to lowest system potential. |
| 5 | +IN B | Noninverting input, channel B - electrically isolated from channel A; enables independent dual-signal paths. |
| 6 | –IN B | Inverting input, channel B - identical electrical characteristics to –IN A; no crosstalk with channel A at DC. |
| 7 | OUT B | Amplifier B output - fully independent output stage; supports simultaneous dual-channel signal processing. |
| 8 | V+ | Positive supply terminal - highest system voltage; powers both amplifiers; tolerant of transient overshoot ≤ ±0.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings within 70 mV of V+ and V– at 10 kΩ load - preserves >98% of available voltage headroom in single-supply systems. |
| EMI/RFI filtered inputs | Integrated input filtering suppresses >1 GHz RF interference - eliminates external ferrite beads in noisy industrial environments. |
| No phase reversal | Input common-mode extends beyond rails without polarity inversion - prevents latch-up or runaway in overvoltage transients. |
| Low input bias current | ±8 pA (typ) - minimizes voltage error across high-impedance sources (e.g., pH electrodes, piezoelectric sensors). |
| High CMRR | 120 dB (typ, VS = ±18 V) - rejects power supply ripple and ground noise in differential measurement topologies. |
Applications
| Bridge Amplifier | Transducer Signal Conditioning |
|---|---|
Use Scenario: Amplifying differential output from Wheatstone bridge pressure or load cells in factory automation systems. IC Role / Device Role / Timing Role: Dual-channel OPA2172IDGKR configures as two matched instrumentation amplifier front-ends, rejecting common-mode bridge excitation noise. Use Value: ±0.2 mV offset and 120 dB CMRR ensure sub-0.01% linearity error across temperature; rail-to-rail output maximizes ADC input range. |
Use Scenario: Low-noise amplification of millivolt-level outputs from RTDs, thermocouples, or strain gauges in process control modules. IC Role / Device Role / Timing Role: Precision op-amp providing programmable gain and filtering before 24-bit sigma-delta ADC sampling. Use Value: 7 nV/√Hz noise density and ±8 pA input bias prevent signal degradation in high-impedance sensor interfaces. |
| Precision Integrator | Tracking Amplifier in Power Modules |
Use Scenario: Building stable analog integrators for PID controllers in motor drives and power supply feedback loops. IC Role / Device Role / Timing Role: OPA2172IDGKR serves as integrator core with low drift (±0.3 µV/°C) and high open-loop gain (107 dB) to minimize integration error. Use Value: Ultra-low offset drift ensures <1 mV/hour integration drift over industrial temperature range, improving long-term stability. |
Use Scenario: High-speed tracking amplifier for gate driver biasing or current sense monitoring in 36-V merchant power supplies. IC Role / Device Role / Timing Role: Dual op-amp implements fast-settling (2 µs to 0.1%) voltage follower and current-to-voltage conversion simultaneously. Use Value: 10 MHz bandwidth and 10 V/µs slew rate support accurate real-time tracking of switching waveforms up to 1 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision dual op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2182IDR | Lower offset (±4 µV), lower noise (5.7 nV/√Hz), but 2-MHz GBP and higher IQ (700 µA per amp). | Better DC precision; unsuitable for >200-kHz closed-loop bandwidth needs due to reduced bandwidth. | Select when ultra-low offset drift dominates over speed; verify layout for lower noise sensitivity. |
| ADA4625-2ARZ | Higher slew rate (35 V/µs), wider supply (±20 V), but higher noise (7.9 nV/√Hz) and no EMI filtering. | Superior transient response for fast pulse amplification; lacks integrated RFI suppression in EMI-heavy environments. | Prefer for high-slew applications like laser diode drivers; add external EMI filters if used near switching regulators. |
Compared with OPA2172IDGKR, OPA2182IDR trades bandwidth for ultra-low drift and offset, while ADA4625-2ARZ prioritizes slew rate and supply headroom over noise immunity-making OPA2172IDGKR the balanced choice for general-purpose 10-MHz precision dual amplification.
Availability
OPA2172IDGKR is available at Aetrix Electronics and suitable for industrial sensor interfaces, test equipment signal chains, and power module monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2172IDGKR 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 specializing in analog and embedded processing technologies, with decades of expertise in precision amplifiers and high-reliability industrial ICs.
The OPAx172 family-including OPA2172IDGKR-is designed for high-voltage, low-noise, rail-to-rail output signal conditioning in demanding industrial, test, and measurement applications where accuracy, stability, and robustness are essential.
FAQ
What is the maximum operating supply voltage for OPA2172IDGKR?
The OPA2172IDGKR supports a maximum supply voltage of +36 V in single-supply mode or ±18 V in dual-supply mode. Absolute maximum ratings specify (V+) – (V–) ≤ 40 V, but recommended operation is limited to 36 V to ensure reliability and specified performance across temperature. Exceeding 36 V may degrade long-term parametric stability.
Does OPA2172IDGKR support rail-to-rail input operation?
The OPA2172IDGKR supports rail-to-rail *output*, but its input common-mode range extends only to V– – 0.1 V and V+ – 2 V under normal operation. Full rail-to-rail input (to V+ + 0.1 V) is possible but with reduced performance within 2 V of V+. This behavior is explicitly documented in the TI SBOS618I datasheet Section 3.
What is the thermal resistance (RθJA) of OPA2172IDGKR in its SOIC-8 package?
The OPA2172IDGKR in the SOIC-8 (D) package has a junction-to-ambient thermal resistance (RθJA) of 116.1°C/W, as confirmed in Section 7.5 of the official datasheet. This value assumes standard JEDEC 2S2P board conditions and is critical for calculating junction temperature rise under load.
Can OPA2172IDGKR drive capacitive loads directly?
Yes, the OPA2172IDGKR can drive capacitive loads up to several hundred picofarads, but stability depends on load magnitude and PCB layout. Figure 23–24 in the datasheet show small-signal overshoot vs capacitive load; for >100 pF, use an isolation resistor (e.g., 10–50 Ω) in series with the output to maintain phase margin.
Is OPA2172IDGKR pin-compatible with other devices in the OPAx172 family?
OPA2172IDGKR (SOIC-8) shares identical pinout with OPA2172 variants in VSSOP-8 (DGK) and WSON-8 (DRG) packages, as confirmed in the Pin Functions table (Section 6). However, it is not pin-compatible with OPA172 (5-pin) or OPA4172 (14-pin) due to differing channel count and package geometry.
OPA2172IDGKR 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:
- 2
- 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 (x2 Channels)
- Current - Output / Channel:
- 75 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-VSSOP
OPA2172IDGKR FAQ
1.How can I place an order for OPA2172IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2172IDGKR 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 OPA2172IDGKR reliable?
The price and inventory of OPA2172IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2172IDGKR is usually 5 days.
3.What payment methods are accepted for OPA2172IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2172IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2172IDGKR?
OPA2172IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2172IDGKR 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 OPA2172IDGKR?
For technical support, including OPA2172IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2172IDGKR requirements.
6.How does Aetrix verify that OPA2172IDGKR is sourced from the original manufacturer or authorized distributors?
All OPA2172IDGKR 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 OPA2172IDGKR meets industry standards.
7.What is the process for return or replacement of OPA2172IDGKR?
All OPA2172IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2172IDGKR, 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 OPA2172IDGKR part is unused and in its original packaging.
Return procedure for OPA2172IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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