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Texas Instruments TLV2231CDBVR
- Part No.:
- TLV2231CDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV2231CDBVR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,289
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Product details
Overview
TLV2231CDBVR from Texas Instruments is a single, rail-to-rail output, low-power LinCMOS™ operational amplifier in SOT-23-5 package. It delivers 2 MHz gain-bandwidth, 1.6 V/µs slew rate at 5 V, and 15 nV/√Hz input voltage noise - optimized for low-voltage (2.7–10 V), single-supply signal conditioning of high-impedance sources such as piezoelectric transducers in portable sensing systems.
For engineers reviewing the TLV2231CDBVR datasheet, TLV2231CDBVR pinout, TLV2231CDBVR application, or TLV2231CDBVR equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation insights, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The TLV2231CDBVR employs a CMOS input stage with 1 pA typical input bias current and rail-to-rail output swing - enabling full dynamic range utilization in 3 V and 5 V single-supply systems. Its 2 MHz unity-gain bandwidth and 1.6 V/µs slew rate support ac-coupled audio preamplification and multiplexed data-acquisition front-ends without phase distortion or settling delay.
Designed for micropower operation (750–1300 µA supply current), it features wide common-mode input range (including negative rail) and high open-loop gain (>1 V/mV at 600 Ω load), making it suitable for precision buffering ahead of ADCs and low-noise sensor interfacing where input impedance >1 TΩ and noise floor <16 nV/√Hz are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 10 V - supports direct integration into 3 V and 5 V battery-powered or low-voltage industrial rails without LDO overhead. |
| Gain-Bandwidth Product | 2 MHz at VDD = 5 V - enables stable unity-gain buffer configurations up to ~200 kHz with 1 Vpp output swing into 600 Ω. |
| Slew Rate | 1.6 V/µs at VDD = 5 V - ensures ≤1 µs settling to 0.1% for 1 V step, critical for fast multiplexed sensor sampling. |
| Input Voltage Noise | 15 nV/√Hz at f = 1 kHz - preserves SNR in low-level piezoelectric or thermopile signal chains before amplification. |
| Input Bias Current | 1 pA typ - minimizes voltage error across high-impedance source impedances >100 MΩ (e.g., pH electrodes, photodiodes). |
| Output Swing | Rail-to-rail - delivers full 0–VDD output range, maximizing ADC utilization and eliminating level-shifting circuitry. |
| Common-Mode Input Range | Includes VDD– (ground) - allows direct interface to ground-referenced sensors without input biasing resistors. |
Pinout & Package
SOT-23-5 (DBV) package: 2.9 mm × 2.8 mm footprint, 5.6 mm² total area - occupies one-third the board space of SOIC-8, enabling placement adjacent to signal sources to reduce PCB trace noise pickup.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN+ | Noninverting input | High-impedance CMOS node; accepts signals down to VDD–; requires guard ring if used with >1 GΩ sources. |
| 2: VDD–/GND | Negative power supply / ground reference | Return path for all currents; must be low-impedance; shared with signal ground in single-supply systems. |
| 3: IN– | Inverting input | Differential input node; separated from IN+ by GND pin to prevent coupling; used for feedback in inverting configurations. |
| 4: OUT | Amplifier output | Rail-to-rail CMOS output capable of sourcing/sinking ±1 mA into 600 Ω; requires RISO for >1 nF capacitive loads. |
| 5: VDD+ | Positive power supply | Accepts 2.7–10 V; decoupling capacitor (0.1 µF) required within 2 mm for stability; sensitive to supply ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full 0–VDD output range at light loads, eliminating need for dual supplies or level shifters in ADC driver stages. |
| 1 pA typical input bias current | Enables accurate amplification of ultra-high-impedance sources (e.g., electret mics, ceramic sensors) without significant DC offset drift. |
| 15 nV/√Hz input voltage noise | Preserves signal integrity in low-amplitude sensor interfaces; complements 1 TΩ common-mode input resistance for minimal loading. |
| Specified at 3 V and 5 V | Guarantees performance across common portable and industrial logic rails - no derating or characterization gaps at nominal voltages. |
| Optimized SOT-23-5 pinout | GND between IN+ and IN– suppresses coupling; OUT and IN– co-located for compact feedback routing - reduces parasitic inductance in high-speed layouts. |
Applications
| Low-Power Audio Preamp | Multiplexed Data Acquisition |
|---|---|
|
Use Scenario: Battery-powered wearable audio recorder conditioning microphone output before ADC sampling. IC Role / Device Role / Timing Role: Single-supply noninverting amplifier with gain = 100, driving SAR ADC input at 100 kSPS. Use Value: Rail-to-rail output ensures full 0–3 V ADC input range; 15 nV/√Hz noise maintains >90 dB SNR at 1 kHz; 750 µA IDD extends battery life. |
Use Scenario: Industrial PLC analog input module switching 16 thermocouple channels via analog multiplexer. IC Role / Device Role / Timing Role: Buffer between mux output and ADC, rejecting crosstalk and maintaining signal fidelity during channel switching. Use Value: 1 pA input bias prevents voltage error across 100 kΩ thermocouple leads; rail-to-rail swing preserves resolution across full temperature range. |
| Optical Module Monitoring | Server PSU Feedback Sensing |
|
Use Scenario: Monitoring photodiode current in fiber-optic transceiver using transimpedance configuration. IC Role / Device Role / Timing Role: Low-noise TIA with 1 MΩ feedback resistor, converting µA-level photocurrent to voltage for digitization. Use Value: 1 pA input bias avoids dark-current-induced offset; 15 nV/√Hz noise sets floor for sub-µA detection; 2 MHz GBW supports 100 kHz modulation bandwidth. |
Use Scenario: Isolated voltage sensing in 48 V server power supply output stage for digital PWM controller feedback. IC Role / Device Role / Timing Role: Precision attenuator + buffer scaling 48 V rail to 2.5 V for ADC input, operating from local 3.3 V supply. Use Value: Common-mode input range including ground allows direct connection to resistor divider midpoint; 0.75 mV max VIO ensures <0.02% full-scale error at 48 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2431CDBVR | Higher supply current (1.2 mA typ), lower noise (12 nV/√Hz), same SOT-23-5 package and pinout. | Better suited for noise-critical audio paths but increases battery load; not drop-in due to higher IDD. | Select when SNR >95 dB is mandatory and power budget allows +500 µA per channel. |
| OPA333AIDBVR | Zero-drift architecture, 0.1 µV/°C offset drift, 6 µV max VIO, but 17 nV/√Hz noise and 1.2 mA IDD. | Superior dc accuracy for precision instrumentation; higher noise limits use in ac-coupled audio or fast-sampling systems. | Choose for high-precision dc-coupled sensor conditioning where offset stability outweighs noise and power concerns. |
Compared with TLV2231CDBVR, TLV2431CDBVR trades lower noise for higher quiescent current, while OPA333AIDBVR sacrifices ac performance for ultra-low drift - making TLV2231CDBVR the optimal balance for portable, low-noise, rail-to-rail signal chains requiring <1 mA supply current.
Availability
TLV2231CDBVR is available at Aetrix Electronics and suitable for low-power audio preamplifier, multiplexed data-acquisition systems, and optical module monitoring requiring stable component supply and long-term production continuity.
Supply support for TLV2231CDBVR 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 over 50 years of op amp innovation and broad industrial qualification.
The TLV2231 belongs to TI's LinCMOS™ low-power op amp family, designed specifically for battery-operated and space-constrained applications demanding rail-to-rail output, micropower operation, and high input impedance.
FAQ
What is the maximum capacitive load the TLV2231CDBVR can drive stably?
The TLV2231CDBVR can drive up to ~500 pF directly; beyond that, an isolation resistor (RISO = 10–100 Ω) in series with the output is required to maintain phase margin >45° and prevent ringing. Figure 6-33 in the datasheet shows phase margin degrades from 48° at 0 pF to ~25° at 5 nF without RISO - so for 10 nF loads (e.g., cable shielding), RISO = 50 Ω is recommended. TLV2231CDBVR's internal compensation is optimized for 600 Ω resistive loads, not heavy capacitance.
Does the TLV2231CDBVR support true single-supply operation with input signals extending to ground?
Yes - the TLV2231CDBVR's common-mode input voltage range explicitly includes VDD– (ground), allowing inputs from 0 V up to VDD–1.3 V at 5 V supply. This enables direct connection to ground-referenced sensors like thermistors or bridge outputs without level-shifting circuitry. The input stage is CMOS-based, so no input current flows into ground, preserving accuracy. TLV2231CDBVR achieves this while maintaining 1 pA input bias current and rail-to-rail output swing.
What is the typical supply current of the TLV2231CDBVR at 3 V operation?
The TLV2231CDBVR draws 750–1200 µA typical supply current at 3 V and 25°C, with a maximum of 1500 µA across the full 0°C to 70°C operating range. This micropower consumption enables multi-year battery life in handheld monitors and remote sensors. Supply current scales linearly with voltage - e.g., ~850–1300 µA at 5 V - and remains stable under no-load conditions, making TLV2231CDBVR suitable for always-on wake-up circuits and low-duty-cycle data loggers.
Can the TLV2231CDBVR be used in inverting amplifier configurations with gain < 1?
Yes - the TLV2231CDBVR is unity-gain stable and supports inverting configurations down to gains of 0.1 (e.g., 10 kΩ feedback, 100 kΩ input resistor). Its 2 MHz gain-bandwidth ensures ≥200 kHz small-signal bandwidth at G = 0.1, and its rail-to-rail output maintains full swing even with inverted polarity. Layout best practices apply: place feedback resistor close to IN–, use ground plane under IN+ and IN– traces, and avoid routing noisy digital lines near the input nodes. TLV2231CDBVR's low input bias current prevents gain error from resistor-divider loading.
How does the TLV2231CDBVR's input offset voltage compare between 3 V and 5 V supply conditions?
TLV2231CDBVR's input offset voltage is specified identically across supply voltages: 0.75 mV typical (3 mV max) at both 3 V and 5 V, over the full 0°C to 70°C range. This consistency simplifies design across multiple rail voltages - no recalibration needed when migrating from 3 V portable to 5 V industrial systems. The temperature coefficient is also stable at 0.5 µV/°C, ensuring predictable drift. Unlike many older op amps, TLV2231CDBVR's VIO does not degrade at low supply, making it reliable for precision 3 V sensor interfaces.
TLV2231CDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.6V/µs
- Gain Bandwidth Product:
- 2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 710 µV
- Current - Supply:
- 850µA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 10 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TLV2231CDBVR FAQ
1.How can I place an order for TLV2231CDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2231CDBVR 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 TLV2231CDBVR reliable?
The price and inventory of TLV2231CDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2231CDBVR is usually 5 days.
3.What payment methods are accepted for TLV2231CDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2231CDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2231CDBVR?
TLV2231CDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2231CDBVR 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 TLV2231CDBVR?
For technical support, including TLV2231CDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2231CDBVR requirements.
6.How does Aetrix verify that TLV2231CDBVR is sourced from the original manufacturer or authorized distributors?
All TLV2231CDBVR 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 TLV2231CDBVR meets industry standards.
7.What is the process for return or replacement of TLV2231CDBVR?
All TLV2231CDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TLV2231CDBVR, 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 TLV2231CDBVR part is unused and in its original packaging.
Return procedure for TLV2231CDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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