My Inquiry
My Account
Texas Instruments OPA2189IDGKT
- Part No.:
- OPA2189IDGKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2189IDGKT.pdf
- Description:
- IC OPAMP
- Quantity:
- Payment:
- Shipping:
Inventory:1,733
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA2189IDGKT from Texas Instruments is a dual-channel, zero-drift, rail-to-rail output operational amplifier optimized for precision instrumentation and multiplexed analog signal conditioning. It delivers 3 μV maximum input offset voltage, 0.01 µV/°C max drift over –40°C to +125°C, 14-MHz gain bandwidth, and MUX-friendly inputs that prevent inrush current during channel switching - enabling high-accuracy battery test systems and weigh-scale front-ends.
For engineers reviewing the OPA2189IDGKT datasheet, OPA2189IDGKT pinout, OPA2189IDGKT application, or OPA2189IDGKT equivalent, this page provides verified specifications, VSSOP-8 package layout, real-world use cases in multichannel data acquisition, and validated alternative parts with documented functional trade-offs.
Technical Context
The OPA2189IDGKT implements a chopper-stabilized architecture with auto-zeroing to achieve ultra-low drift and offset. Its MUX-friendly input stage eliminates anti-parallel diodes, maintaining high input impedance (>60 TΩ common-mode) and preventing source loading during large differential voltage transitions across multiplexed sensor arrays.
It operates from ±2.25 V to ±18 V (4.5 V to 36 V single-supply), supports rail-to-rail output swing within 15 mV of rails (no load), and features 168 dB CMRR and 170 dB open-loop gain - ensuring stable closed-loop performance in precision active filtering and low-level signal amplification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±3 µV max at 25°C; enables sub-10 ppm accuracy in 16-bit+ measurement systems without calibration. |
| Offset Drift | ±0.01 µV/°C max (–40°C to +125°C); ensures <1 µV total drift over full industrial temperature range. |
| Gain Bandwidth | 14 MHz; supports stable unity-gain buffering of fast step signals (e.g., 10-V step settling to 0.01% in 1.1 µs). |
| Input Voltage Noise | 5.2 nV/√Hz at 1 kHz; preserves SNR in low-frequency sensor interfaces like bridge-based load cells. |
| CMRR | 168 dB at ±18 V; rejects >99.9999% of common-mode interference in noisy industrial environments. |
| Supply Range | ±2.25 V to ±18 V (4.5–36 V single-supply); compatible with legacy 24-V industrial rails and modern low-voltage battery-powered designs. |
| Quiescent Current | 1.7 mA per amplifier max; balances ultra-precision performance with moderate power consumption in always-on monitoring systems. |
Pinout & Package
VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm lead pitch, exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output; rail-to-rail capable, drives ≥10 kΩ loads to within 15 mV of supply rails. |
| 2 | –IN A | Inverting input channel A; MUX-friendly architecture prevents current injection during input switching. |
| 3 | +IN A | Noninverting input channel A; common-mode range extends to V– – 0.1 V for ground-referenced sensors. |
| 4 | V– | Negative supply terminal; accepts up to –20 V absolute rating; must be decoupled locally. |
| 5 | +IN B | Noninverting input channel B; independent of channel A; supports dual-sensor simultaneous sampling. |
| 6 | –IN B | Inverting input channel B; identical MUX-friendly behavior as channel A; no cross-talk path to channel A. |
| 7 | OUT B | Amplifier B output; fully isolated from OUT A; channel separation >120 dB at 100 kHz. |
| 8 | V+ | Positive supply terminal; accepts up to +40 V absolute rating; requires 0.1 µF ceramic bypass near pin. |
Key Features
| Feature | Design Value |
|---|---|
| MUX-friendly inputs | No internal anti-parallel diodes; eliminates input current surges during multiplexer switching, preserving source integrity and settling time. |
| Rail-to-rail output | Swings to within 15 mV of V+ and V– under no load; maximizes dynamic range in single-supply 3.3 V or 5 V systems. |
| Zero-drift architecture | Chopper + auto-zero hybrid design achieves 0.01 µV/°C max drift; eliminates thermal-induced baseline errors in long-duration measurements. |
| RFI/EMI filtered inputs | Integrated input filtering suppresses high-frequency interference from switch-mode supplies and radio transceivers. |
| Wide supply range | Operates from 4.5 V to 36 V single-supply or ±2.25 V to ±18 V dual-supply; simplifies system power architecture across industrial and test equipment. |
Applications
| Battery Test System | Analog Input Module |
|---|---|
Use Scenario: High-accuracy voltage and current measurement during charge/discharge cycling of Li-ion cells under varying temperature and load conditions. IC Role / Device Role / Timing Role: Dual-channel precision buffer and difference amplifier for cell voltage monitoring and shunt-based current sensing. Use Value: Sub-µV offset drift ensures <0.005% measurement error over temperature, critical for capacity estimation and state-of-charge algorithms. | Use Scenario: Industrial PLC analog input card acquiring signals from 4–20 mA transmitters, RTDs, and thermocouples in electrically noisy factory environments. IC Role / Device Role / Timing Role: Front-end signal conditioner with programmable gain and filtering before ADC sampling. Use Value: 168 dB CMRR and RFI-filtered inputs reject common-mode noise from motor drives and VFDs, improving effective resolution by ≥2 bits. |
| Weigh Scale | DC Power Supply Monitoring |
Use Scenario: Strain-gauge bridge signal amplification in platform scales and hopper load cells requiring legal-for-trade accuracy (OIML R76). IC Role / Device Role / Timing Role: Low-noise, zero-drift instrumentation amplifier core (with external resistors) for bridge excitation and differential output conditioning. Use Value: 0.1 µVPP 0.1–10 Hz noise and 5.2 nV/√Hz broadband noise enable 24-bit effective resolution without oversampling. | Use Scenario: Real-time voltage and current sensing in programmable DC power supplies for lab and production test benches. IC Role / Device Role / Timing Role: Isolated feedback amplifier for output regulation loop and precision sense amplifier for current monitor path. Use Value: Fast 1.1 µs settling to 0.01% supports dynamic load transient response analysis and tight regulation bandwidths up to 100 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2188IDGKT | Higher 25-µV max offset, 0.085 µV/°C drift, 8.8 nV/√Hz noise; same VSSOP-8 package. | Lower precision; suitable where cost sensitivity outweighs sub-µV drift requirements. | Select when 16-bit accuracy suffices and budget constraints preclude OPA2189-grade performance. |
| OPA2333AIDGKR | 5.5-V max supply, 10-µV offset, 0.05 µV/°C drift, 25-µA IQ; same 8-pin VSSOP footprint. | Low-voltage, ultra-low-power operation; not rated for >5.5 V or industrial temperature range. | Choose only for battery-powered portable instruments operating ≤5.5 V and requiring <30 µA per channel. |
Compared with OPA2188IDGKT and OPA2333AIDGKR, the OPA2189IDGKT delivers superior dc precision (3 µV vs 25 µV/10 µV offset), lower drift (0.01 µV/°C vs 0.085 µV/°C/0.05 µV/°C), and wider supply range - making it the only choice for 24-bit industrial measurement systems demanding stability across –40°C to +125°C.
Availability
OPA2189IDGKT is available at Aetrix Electronics and suitable for battery test systems, analog input modules, weigh-scale electronics, and DC power supply monitoring requiring stable component supply and guaranteed long-term manufacturability.
Supply support for OPA2189IDGKT 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 signal chain solutions.
The OPAx189 product line was designed specifically for high-accuracy, low-drift signal conditioning in industrial test equipment, weigh scales, and battery analytics - prioritizing MUX compatibility, rail-to-rail output, and robust ESD tolerance.
FAQ
What is the maximum operating temperature range for the OPA2189IDGKT?
The OPA2189IDGKT is specified from –40°C to +125°C ambient temperature, with all key parameters including offset drift, CMRR, and open-loop gain guaranteed across this full industrial range. This makes OPA2189IDGKT suitable for deployment in harsh environments such as factory automation cabinets and outdoor power conversion systems.
Does the OPA2189IDGKT require external compensation for unity-gain stability?
No, the OPA2189IDGKT is internally compensated and stable at unity gain (AV = 1). Its gain-bandwidth product remains 14 MHz at AV = 1, and typical small-signal overshoot is <5% into 100-pF capacitive loads - eliminating need for external compensation networks in standard buffer or gain-of-one configurations.
How does the MUX-friendly input architecture of the OPA2189IDGKT improve multichannel system performance?
The OPA2189IDGKT omits anti-parallel input diodes, preventing current injection into the signal source during multiplexer switching events. This preserves source impedance integrity and reduces settling time by up to 3× compared to conventional op-amps - directly improving throughput and accuracy in scanned sensor arrays used in OPA2189IDGKT-based data loggers.
Can the OPA2189IDGKT drive heavy capacitive loads, and what is its maximum rated capacitive load?
The OPA2189IDGKT can drive ≥100 pF capacitive loads with minimal overshoot (<5%) in unity-gain configuration. While not characterized for unlimited capacitance, its open-loop output impedance (380 Ω at 1 MHz) and internal compensation allow stable operation into typical ADC input capacitances and PCB trace capacitances without isolation resistors - a key advantage confirmed in OPA2189IDGKT reference designs.
Is the OPA2189IDGKT pin-compatible with other dual op-amps in the VSSOP-8 package?
The OPA2189IDGKT uses a non-standard pinout: OUT A on pin 1, –IN A on pin 2, +IN A on pin 3, V– on pin 4, +IN B on pin 5, –IN B on pin 6, OUT B on pin 7, and V+ on pin 8. It is not pin-compatible with generic dual op-amps like LMV358 or OPA2313 - direct replacement requires PCB layout revision to match OPA2189IDGKT's dedicated channel-isolated pin mapping.
OPA2189IDGKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 20V/µs
- Gain Bandwidth Product:
- 14 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 70 pA
- Voltage - Input Offset:
- 1.5 µV
- Current - Supply:
- 1.3mA (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 (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2189IDGKT FAQ
1.How can I place an order for OPA2189IDGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2189IDGKT 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 OPA2189IDGKT reliable?
The price and inventory of OPA2189IDGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2189IDGKT is usually 5 days.
3.What payment methods are accepted for OPA2189IDGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2189IDGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2189IDGKT?
OPA2189IDGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2189IDGKT 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 OPA2189IDGKT?
For technical support, including OPA2189IDGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2189IDGKT requirements.
6.How does Aetrix verify that OPA2189IDGKT is sourced from the original manufacturer or authorized distributors?
All OPA2189IDGKT 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 OPA2189IDGKT meets industry standards.
7.What is the process for return or replacement of OPA2189IDGKT?
All OPA2189IDGKT units undergo pre-shipment inspection (PSI). If there is an issue with OPA2189IDGKT, 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 OPA2189IDGKT part is unused and in its original packaging.
Return procedure for OPA2189IDGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2189IDGKT Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
