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Texas Instruments LMV931IDCKR
- Part No.:
- LMV931IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LMV931IDCKR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,945
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Product details
Overview
LMV931IDCKR from Texas Instruments is a single-channel, rail-to-rail input/output operational amplifier optimized for 1.8-V to 5-V low-power applications. It delivers 1.4 MHz gain bandwidth, 100 μA supply current per channel, and rail-to-rail output swing within 80 mV of either rail under 600-Ω load - enabling high-fidelity signal conditioning in battery-powered portable audio and supply-current monitoring circuits.
For engineers reviewing the LMV931IDCKR datasheet, LMV931IDCKR pinout, LMV931IDCKR application, or LMV931IDCKR equivalent, key selection considerations include its SC-70-5 package footprint, –40°C to 125°C operating range, rail-to-rail input common-mode voltage extending 200 mV beyond rails, and verified performance at 1.8-V supply with <4 mV max input offset voltage.
Technical Context
The LMV931IDCKR employs a Class AB output stage with complementary bipolar input transistors, supporting rail-to-rail input operation down to VCC– – 0.2 V and up to VCC+ + 0.2 V. Its internal biasing enables stable operation across 1.8–5 V supplies while maintaining 101 dB open-loop DC gain and 67° phase margin at 1.8 V with 600-Ω load.
It features a simplified two-stage architecture with no internal compensation capacitor, allowing direct use with capacitive loads up to 1000 pF without significant ringing. The device achieves 0.35 V/μs slew rate at 1.8 V and maintains >73 dB large-signal voltage gain into 600 Ω across its full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 5 V - supports single-cell Li-ion (2.7–4.2 V) and two-cell alkaline (2.4–3.2 V) systems without level-shifting. |
| Gain Bandwidth Product | 1.4 MHz - enables stable unity-gain buffer or gain-of-10 amplification up to 140 kHz with adequate phase margin. |
| Supply Current per Channel | 100 μA - allows integration into always-on sensor front-ends with sub-100 μA system sleep budgets. |
| Input Offset Voltage (max) | 4 mV - ensures ≤0.2% error in 12-bit ADC reference buffering at 5 V full-scale. |
| Output Swing (600 Ω load) | Within 80 mV of rails - preserves >96% dynamic range in 1.8-V systems, critical for low-voltage audio DAC output stages. |
| Input Common-Mode Range | VCC– – 0.2 V to VCC+ + 0.2 V - accepts inputs beyond supply rails, simplifying single-supply sensor interfacing (e.g., thermistor bridges). |
| Operating Temperature | –40°C to 125°C - qualified for automotive cabin and industrial utility metering environments. |
Pinout & Package
LMV931IDCKR is housed in a 5-pin SC-70 (DCK) package, measuring 2.0 mm × 1.25 mm × 0.9 mm, with 0.65 mm lead pitch and exposed pad for thermal enhancement. Pin 1 is marked with a dot; top-view orientation matches standard SC-70 pin numbering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN+ | Non-inverting input - high-impedance node (IIB = 65 nA) compatible with high-resistance sensor sources. |
| 2 | IN− | Inverting input - matched to IN+ for <4 mV VIO; requires symmetrical layout to minimize thermal EMF errors. |
| 3 | VCC− | Negative supply rail - must be connected directly to ground plane; decoupling capacitor required within 2 mm. |
| 4 | VCC+ | Positive supply rail - accepts 1.8–5 V; bypass capacitor mandatory to suppress PSRR degradation above 10 kHz. |
| 5 | OUTPUT | Amplifier output - capable of sourcing/sinking ≥20 mA short-circuit current; drives 600 Ω loads with <0.023% THD at 1 kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 1.8-V supply headroom in single-supply configurations, eliminating need for external level-shifters. |
| 100 μA quiescent current | Permits continuous operation in energy-harvesting nodes where average power must remain below 200 μW at 2 V. |
| 1.4-MHz GBW at 1.8 V | Supports closed-loop bandwidths >100 kHz in gain-of-2 configurations, suitable for anti-alias filtering before 200-kSPS SAR ADCs. |
| 200-mV beyond-rail input range | Allows direct connection to overvoltage-tolerant sensors (e.g., 5-V-output transducers on 3.3-V MCU systems) without external clamping diodes. |
| –40°C to 125°C operation | Validated for under-hood automotive and outdoor utility meter deployments without derating or thermal management overhead. |
Applications
| Battery Monitoring | Portable Audio Output Stage |
|---|---|
Use Scenario: Real-time measurement of lithium-ion cell voltage during charge/discharge cycles in wearables and medical patches. IC Role / Device Role / Timing Role: Precision buffer between resistive divider and 12-bit ADC input, rejecting supply ripple via 75 dB PSRR at 60 Hz. Use Value: 4-mV max VIO ensures ≤0.1% full-scale error across 2.5–4.2 V range; rail-to-rail output eliminates clipping during low-battery brownout conditions. | Use Scenario: Low-noise headphone driver in Bluetooth earbuds powered by 1.8-V LDO-regulated supply. IC Role / Device Role / Timing Role: Unity-gain output buffer for stereo DAC, driving 16-Ω headphones with minimal distortion. Use Value: 0.023% THD+N at 1 kHz/600 Ω meets consumer audio SNR requirements; 0.35 V/μs slew rate prevents slew-induced distortion at 20 kHz. |
| Industrial Sensor Signal Conditioning | Supply-Current Monitoring |
Use Scenario: Amplification of millivolt-level outputs from RTD or thermocouple interfaces in smart building controllers. IC Role / Device Role / Timing Role: Instrumentation-grade gain stage with matched input impedance, referenced to local ground. Use Value: 200-mV beyond-rail VICR accommodates cold-junction compensation offsets; 60 nV/√Hz input noise preserves <0.1°C resolution in 24-bit ΣΔ ADC systems. | Use Scenario: High-side current sensing in USB-C PD chargers to monitor adapter efficiency and detect fault conditions. IC Role / Device Role / Timing Role: Difference amplifier configured with precision external resistors to measure mV-level shunt voltage. Use Value: CMRR ≥75 dB at 25°C rejects common-mode noise from switching regulators; 100 μA ICC enables always-on monitoring without compromising standby current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9001IDCKR | Lower 0.1-μV/°C VIO drift vs. LMV931IDCKR's 5.5 μV/°C; 1-MHz GBW vs. 1.4 MHz; same SC-70-5 package. | Better DC stability for precision sensor front-ends; reduced bandwidth limits high-frequency filtering capability. | Select TLV9001IDCKR when long-term offset drift dominates over small-signal bandwidth requirements. |
| OPA316IDBVR | Higher 10-MHz GBW and 6-V/μs slew rate; 400-μA ICC vs. 100 μA; SOT-23-5 package (DBV), not SC-70. | Enables active filters and higher-speed signal paths but increases power budget tenfold. | Select OPA316IDBVR only when >1-MHz closed-loop bandwidth is required and PCB layout allows SOT-23 footprint. |
Compared with TLV9001IDCKR and OPA316IDBVR, LMV931IDCKR uniquely balances ultra-low quiescent current, rail-to-rail I/O, and sufficient bandwidth for 12-bit data acquisition - making it optimal for space-constrained, battery-sensitive designs where power efficiency outweighs extreme precision or speed.
Availability
LMV931IDCKR is available at Aetrix Electronics and suitable for battery monitoring, portable audio output stages, industrial sensor signal conditioning, and supply-current monitoring requiring stable component supply across extended temperature ranges.
Supply support for LMV931IDCKR 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 specializing in analog and embedded processing technologies, with leadership in precision amplifiers and low-power signal chains.
The LMV93x family was designed specifically for ultra-low-voltage, low-quiescent-current applications in portable and energy-constrained systems - emphasizing rail-to-rail operation, wide supply range (1.8–5 V), and robust performance across –40°C to 125°C.
FAQ
What is the maximum operating supply voltage for LMV931IDCKR?
The absolute maximum supply voltage (VCC+ – VCC–) for LMV931IDCKR is 5.5 V, but the recommended operating range is 1.8 V to 5 V per TI SLOS441G. Operation at 5.5 V risks permanent damage; sustained use above 5 V violates specifications and may degrade long-term reliability. For 5-V systems, ensure VCC+ does not exceed 5.0 V under all transient and load conditions.
Does LMV931IDCKR support true rail-to-rail input at 1.8-V supply?
Yes, LMV931IDCKR supports rail-to-rail input with common-mode voltage range extending 200 mV beyond both rails (VCC– – 0.2 V to VCC+ + 0.2 V) at 1.8-V supply. This is confirmed in the Electrical Characteristics table for VCC = 1.8 V, where VICR is specified as VCC– – 0.2 V to VCC+ + 0.2 V with CMRR ≥50 dB - enabling direct interface with overvoltage-capable sensors without external level-shifting.
What is the typical output swing of LMV931IDCKR when driving a 600-Ω load at 1.8 V?
At 1.8-V supply and 600-Ω load, LMV931IDCKR delivers typical output swing within 80 mV of each rail - i.e., low-level output ≈ 0.08 V and high-level output ≈ 1.72 V. This is explicitly stated in the "Rail-to-Rail Output Swing" bullet under FEATURES and verified in the Electrical Characteristics table (VO = 0.077–0.105 V low level and 1.65–1.72 V high level at 25°C).
Is LMV931IDCKR pin-compatible with other devices in the LMV93x family?
No, LMV931IDCKR is not pin-compatible with LMV932 or LMV934. As a single-channel amplifier in SC-70-5 package, it has only five pins (IN+, IN−, VCC−, VCC+, OUTPUT), whereas LMV932 (dual) uses 8-pin MSOP/SOIC and LMV934 (quad) uses 14-pin SOIC/TSSOP. Pin mapping and channel count differ fundamentally; interchanging requires PCB redesign.
What is the thermal resistance (θJA) of the SC-70 package used by LMV931IDCKR?
The junction-to-ambient thermal resistance (θJA) for the SC-70 (DCK) package of LMV931IDCKR is 252°C/W, as documented in the Absolute Maximum Ratings table of SLOS441G. This value assumes standard JEDEC 2-layer board conditions (1-inch² copper pad); actual thermal performance improves with enhanced PCB copper area or thermal vias beneath the exposed pad.
LMV931IDCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.42V/µs
- Gain Bandwidth Product:
- 1.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 116µA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LMV931IDCKR FAQ
1.How can I place an order for LMV931IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV931IDCKR 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 LMV931IDCKR reliable?
The price and inventory of LMV931IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV931IDCKR is usually 5 days.
3.What payment methods are accepted for LMV931IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV931IDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV931IDCKR?
LMV931IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV931IDCKR 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 LMV931IDCKR?
For technical support, including LMV931IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV931IDCKR requirements.
6.How does Aetrix verify that LMV931IDCKR is sourced from the original manufacturer or authorized distributors?
All LMV931IDCKR 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 LMV931IDCKR meets industry standards.
7.What is the process for return or replacement of LMV931IDCKR?
All LMV931IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with LMV931IDCKR, 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 LMV931IDCKR part is unused and in its original packaging.
Return procedure for LMV931IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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