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Texas Instruments OPA369AIDCKR
- Part No.:
- OPA369AIDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
OPA369AIDCKR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,905
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Product details
Overview
OPA369AIDCKR from Texas Instruments is a single, ultra-low-power, rail-to-rail input/output operational amplifier optimized for 1.8V–5.5V battery-powered systems. It delivers 250µV max offset voltage, 700nA quiescent current, 12kHz gain-bandwidth, and zero-crossover architecture to eliminate input stage distortion in low-voltage sensor signal conditioning.
For engineers reviewing the OPA369AIDCKR datasheet, OPA369AIDCKR pinout, OPA369AIDCKR application, or OPA369AIDCKR equivalent, this page provides verified specifications, SC70-5 package details, real-world use cases in medical instrumentation and portable devices, and validated alternative options for low-power analog design.
Technical Context
The OPA369AIDCKR uses a complementary input stage with zero-crossover correction to maintain linear input common-mode behavior across the full rail-to-rail range (V– to V+), eliminating the offset discontinuity typical of conventional RRO op amps below 3V supply. Its 10pA input bias current and 114dB CMRR support high-impedance sensor interfacing without degradation.
Designed for micro-power operation, the device achieves 700nA IQ at 1.8V while sustaining 134dB open-loop gain and 106dB PSRR - enabling stable DC-coupled amplification in energy-constrained applications where supply rejection and precision must coexist at sub-1µA current budgets.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.8V to 5.5V - operates directly from single-cell Li-ion, alkaline, or coin-cell batteries without regulation. |
| Quiescent Current | 700nA typ - enables >10-year battery life in always-on sensor nodes with 200mAh capacity. |
| Input Offset Voltage | 250µV max - supports 12-bit accuracy in 3.3V systems without trimming or calibration. |
| Gain-Bandwidth Product | 12kHz - sufficient for DC–10kHz biosignal amplification (ECG, pulse oximetry) with stability margin. |
| Input Bias Current | 10pA typ - preserves signal integrity when driving from high-Z sources like pH electrodes or piezoresistive sensors. |
| CMRR | 114dB min - rejects common-mode noise in unshielded leads used in wearable medical monitors. |
| Output Swing | 10mV from rail (RL = 100kΩ) - maximizes dynamic range in low-voltage ADC front-ends. |
Pinout & Package
OPA369AIDCKR is housed in a 5-pin SC70 package (DCK), measuring 2.0mm × 1.25mm × 0.95mm, with moisture sensitivity level 2 (260°C peak reflow). Pin 1 is marked by a dot in the top-left corner of the package outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (–IN) | Differential input node; accepts signals referenced to ground or virtual ground in transimpedance configurations. |
| 2 | Non-Inverting Input (+IN) | High-impedance input (10¹³Ω); used for reference voltage buffering or sensor excitation feedback. |
| 3 | V– (Ground/Negative Supply) | Return path for all internal currents; must be connected to system ground plane with low-inductance trace. |
| 4 | Output (OUT) | Capable of sourcing/sinking ±10mA; drives 100kΩ loads to within 10mV of rails at 1.8V supply. |
| 5 | V+ (Positive Supply) | Accepts 1.8V–5.5V; requires 0.1µF ceramic bypass capacitor placed ≤2mm from pin to minimize supply noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-Crossover Architecture | Eliminates input stage crossover distortion across full common-mode range, enabling accurate DC gain in rail-to-rail sensor interfaces below 3V. |
| Rail-to-Rail I/O | Supports full-scale signal swing from V– to V+ on both inputs and output - critical for maximizing SNR in 1.8V ADC drivers. |
| Ultra-Low Quiescent Current | 700nA ensures <1µA system standby current when paired with low-leakage external components in battery-gauging circuits. |
| Low Offset Drift | 0.4µV/°C max drift maintains calibration stability over –40°C to +85°C ambient - suitable for outdoor environmental sensors. |
| High DC Precision | 134dB open-loop gain and 114dB CMRR enable <0.01% gain error in precision current-sense amplifiers with 100Ω shunts. |
Applications
| Battery Monitoring | Portable Medical Sensors |
|---|---|
Use Scenario: Detecting low-battery condition in handheld glucose meters using a resistive divider and reference voltage. IC Role / Device Role / Timing Role: Comparator with hysteresis, configured as a window detector to trigger shutdown before critical voltage collapse. Use Value: 700nA IQ extends usable battery life by >30% versus µA-class alternatives; zero-crossover ensures clean threshold crossing at 1.8V supply. | Use Scenario: Amplifying weak bio-potential signals (e.g., ECG electrode outputs) in disposable patch monitors. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer, providing high-Z interface and rail-to-rail common-mode rejection. Use Value: 10pA input bias prevents electrode polarization errors; 250µV offset avoids baseline shift in 12-bit digitization. |
| Low-Power Sensor Signal Conditioning | IoT Environmental Sensing |
Use Scenario: Conditioning output from MEMS pressure sensors in smart thermostats with coin-cell power. IC Role / Device Role / Timing Role: Single-supply transducer amplifier with gain-setting resistors, operating from 2.0V supply. Use Value: 12kHz GBW supports DC–10Hz pressure response; 0.4µV/°C drift minimizes temperature-induced calibration drift over seasonal cycles. | Use Scenario: Signal conditioning for NTC thermistors in wireless temperature loggers deployed in cold-chain logistics. IC Role / Device Role / Timing Role: Precision voltage follower and level-shifter, translating thermistor bridge output to ADC input range. Use Value: 114dB CMRR rejects noise from shared PCB ground with RF modules; SC70-5 footprint saves >40% board area vs SOIC-8 alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | Auto-zero architecture; 17µV max offset, 17µA IQ, 350kHz GBW - higher precision but 24× higher current draw. | Used where offset drift dominates error budget (e.g., precision weigh scales), not ultra-low-power battery longevity. | Select OPA333AIDBVR only if sub-20µV offset is mandatory and supply current >10µA is acceptable. |
| LMP7721MAK/NOPB | Femtoampere input bias (3fA typ), 1.9MHz GBW, 1.2mA IQ - optimized for ultra-high-Z photodiode amplification. | Required for picoamp-level current measurement (e.g., radiation detectors), not general-purpose low-power signal conditioning. | Choose LMP7721MAK/NOPB only when input bias <100fA is essential; otherwise OPA369AIDCKR offers superior power/performance balance. |
Compared with OPA333AIDBVR and LMP7721MAK/NOPB, the OPA369AIDCKR uniquely balances nanoscale quiescent current (700nA), rail-to-rail operation down to 1.8V, and zero-crossover linearity - making it the only viable choice for multi-year battery life in compact, low-voltage sensor nodes where both precision and power are constrained.
Availability
OPA369AIDCKR is available at Aetrix Electronics and suitable for battery monitoring, portable medical sensors, low-power sensor signal conditioning, and IoT environmental sensing requiring stable component supply across long production lifecycles.
Supply support for OPA369AIDCKR 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 low-power design.
The OPA369AIDCKR belongs to TI's nanoPOWER operational amplifier family, engineered specifically for energy-harvesting and battery-operated systems where sub-1µA quiescent current and rail-to-rail functionality are non-negotiable.
FAQ
What is the maximum operating temperature range for the OPA369AIDCKR?
The OPA369AIDCKR is specified over an ambient operating temperature range of –40°C to +85°C, with extended operation possible from –55°C to +125°C. All key parameters-including offset voltage, quiescent current, and CMRR-are guaranteed across the –40°C to +85°C range per the SBOS414B datasheet. Thermal resistance (θJA) is 250°C/W for the SC70-5 package, requiring attention to PCB copper area in high-temperature environments.
Does the OPA369AIDCKR require external compensation for unity-gain stability?
No, the OPA369AIDCKR is internally compensated and unity-gain stable. Its 12kHz gain-bandwidth product and dominant-pole architecture ensure unconditional stability with capacitive loads up to 20pF, as confirmed in Figure 20 of the SBOS414B datasheet. No external compensation network is needed for G = +1, –1, or other standard configurations.
Can the OPA369AIDCKR drive ADC inputs directly?
Yes, the OPA369AIDCKR can directly drive SAR and delta-sigma ADC inputs. Its rail-to-rail output swings to within 10mV of V+ and V– at 100kΩ load, delivering full-scale analog range into typical 12- to 16-bit ADCs. For optimal performance, pair with a 0.1µF ceramic decoupling capacitor at the supply pin and keep trace lengths short to minimize noise coupling into the ADC reference path.
What is the meaning of the "G4" suffix in OPA369AIDCKRG4.B?
The "G4" suffix in OPA369AIDCKRG4.B indicates a green (lead-free, RoHS-compliant) packaging variant with NiPdAu lead finish, consistent with TI's standard G4 marking convention. The ".B" denotes a specific tape-and-reel packaging configuration (3000-unit reel, Q3 pin-1 quadrant orientation), not a functional or parametric revision - the OPA369AIDCKR and OPA369AIDCKRG4.B share identical electrical specifications and SC70-5 mechanical form factor.
How does the zero-crossover feature improve performance in low-voltage applications?
The zero-crossover feature in the OPA369AIDCKR eliminates the input offset discontinuity that occurs in conventional rail-to-rail op amps when the common-mode voltage crosses the internal crossover point (typically near mid-supply). At 1.8V operation, this prevents gain nonlinearity and distortion in sensor interfaces - such as thermistor bridges or strain gauges - where input signals span the full supply range, ensuring accurate DC transfer characteristics without post-processing correction.
OPA369AIDCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.005V/µs
- Gain Bandwidth Product:
- 12 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 pA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 800nA
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
OPA369AIDCKR FAQ
1.How can I place an order for OPA369AIDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA369AIDCKR 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 OPA369AIDCKR reliable?
The price and inventory of OPA369AIDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA369AIDCKR is usually 5 days.
3.What payment methods are accepted for OPA369AIDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA369AIDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA369AIDCKR?
OPA369AIDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA369AIDCKR 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 OPA369AIDCKR?
For technical support, including OPA369AIDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA369AIDCKR requirements.
6.How does Aetrix verify that OPA369AIDCKR is sourced from the original manufacturer or authorized distributors?
All OPA369AIDCKR 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 OPA369AIDCKR meets industry standards.
7.What is the process for return or replacement of OPA369AIDCKR?
All OPA369AIDCKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA369AIDCKR, 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 OPA369AIDCKR part is unused and in its original packaging.
Return procedure for OPA369AIDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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