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Texas Instruments LMV721IDCKR
- Part No.:
- LMV721IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LMV721IDCKR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,495
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Product details
Overview
LMV721IDCKR from Texas Instruments is a single-channel, rail-to-rail output, low-noise (9 nV/√Hz), low-voltage (2.2 V to 5.5 V), low-power (0.93 mA at 2.2 V) operational amplifier in SC-70-5 package. It delivers 10 MHz gain-bandwidth, 5 V/µs slew rate, and 3.5 mV max input offset voltage over –40°C to 105°C - optimized for battery-powered audio front-ends and portable sensor signal conditioning.
For engineers reviewing the LMV721IDCKR datasheet, LMV721IDCKR pinout, LMV721IDCKR application, or LMV721IDCKR equivalent, this page provides verified electrical specs, validated SC-70 pin mapping, real-world use cases in electret microphone preamps and active filters, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The LMV721IDCKR employs a CMOS input stage enabling rail-to-rail output swing into 600 Ω loads (120 mV from rails at 2.2 V) and ground-sensing input common-mode range (–0.3 V to 1.3 V at 2.2 V). Its 10 MHz unity-gain bandwidth and 67.4° phase margin ensure stable operation in unity-gain buffer and active filter configurations without external compensation.
Designed for low-noise, low-supply systems, it achieves 9 nV/√Hz input voltage noise at 1 kHz and 0.3 pA/√Hz current noise while maintaining 70 dB minimum CMRR and PSRR across its full operating temperature range (–40°C to 105°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.2 V to 5.5 V - supports direct connection to single-cell Li-ion (3.0–4.2 V) or dual-cell alkaline (2.4–3.2 V) power rails without regulation. |
| Gain-Bandwidth Product | 10 MHz - enables stable unity-gain buffering of audio signals up to 100 kHz with <1 dB gain error. |
| Slew Rate | 5 V/µs - sustains 1 Vpp sine output at 800 kHz without distortion in high-speed sensor interface applications. |
| Input Voltage Noise | 9 nV/√Hz at 1 kHz - critical for preserving SNR in electret microphone preamplifiers with >60 dB dynamic range. |
| Input Offset Voltage | Max 3.5 mV (–40°C to 105°C) - ensures ≤0.7% DC error in 500 mV full-scale medical sensor amplification. |
| Rail-to-Rail Output | Swings within 120 mV of either rail at 2.2 V with 600 Ω load - maximizes dynamic range in low-voltage data acquisition systems. |
| Quiescent Current | 0.93 mA at 2.2 V - enables continuous operation for >100 hours on a 100 mAh coin cell in always-on IoT sensor nodes. |
Pinout & Package
LMV721IDCKR is housed in a 5-pin SC-70 (DCK) package measuring 2.25 mm × 1.35 mm × 1.1 mm (L × W × H), optimized for space-constrained portable designs. Pin 1 is marked by a dot or notch in the top-left corner per JEDEC MO-203.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V− (Ground) | Power supply return reference; must be connected directly to low-impedance system ground plane. |
| 2 | In− | Inverting input terminal; accepts differential or single-ended feedback networks for precision gain control. |
| 3 | In+ | Non-inverting input terminal; supports high-impedance sensor interfaces with input bias current ≤260 nA. |
| 4 | V+ | Positive supply rail; decoupling capacitor (0.1 µF ceramic) required within 2 mm for stability. |
| 5 | Out | Amplified output; drives capacitive loads up to 21.2 nF without oscillation per TI characterization. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise architecture | 9 nV/√Hz input voltage noise enables high-fidelity audio capture in mobile handsets without added filtering overhead. |
| Rail-to-rail output stage | Delivers full 2.0 Vpp swing from 2.2 V supply into 600 Ω - eliminates need for level-shifting circuitry in ADC driver stages. |
| Ground-sensing input | Input common-mode range extends to –0.3 V, allowing direct connection to 0 V-referenced transducers like piezoelectric sensors. |
| Stable at low supply | Maintains 67.4° phase margin and 10 MHz GBW down to 2.2 V - ensures consistent performance across battery discharge curve. |
| Small-footprint packaging | SC-70-5 footprint (2.25 mm × 1.35 mm) reduces PCB area by 45% vs. SOT-23-5, critical for wearable device layouts. |
Applications
| Electret Microphone Preamp | Active Low-Pass Filter |
|---|---|
Use Scenario: Amplifying weak AC-coupled signals from electret condenser microphones in smartphones and voice-controlled IoT devices. IC Role / Device Role / Timing Role: Single-supply, high-input-impedance preamplifier with DC bias generation and gain staging before ADC sampling. Use Value: 9 nV/√Hz noise floor preserves speech intelligibility; rail-to-rail output maximizes ADC utilization without external level shifters. | Use Scenario: Implementing 2nd-order anti-aliasing or tone-shaping filters in portable audio DAC outputs and sensor signal chains. IC Role / Device Role / Timing Role: Unity-gain stable op-amp configured as Sallen-Key topology with precision RC components. Use Value: 10 MHz GBW supports filter cutoffs up to 100 kHz with minimal passband droop; low quiescent current extends battery life. |
| Laptop Touchpad Sensor Interface | Portable ECG Front-End Stage |
Use Scenario: Conditioning capacitance-change signals from projected-capacitive touch sensors operating from 3.3 V logic rails. IC Role / Device Role / Timing Role: Transimpedance amplifier converting picoamp-level sensor currents into measurable voltage swings. Use Value: 260 nA max input bias current minimizes offset drift; 3.5 mV max VOS ensures accurate baseline tracking during multi-touch gestures. | Use Scenario: Amplifying low-amplitude (<1 mV), low-frequency (<100 Hz) biopotential signals from dry-electrode ECG patches. IC Role / Device Role / Timing Role: First-stage instrumentation-grade amplifier with high CMRR and low 1/f noise contribution. Use Value: 70 dB min CMRR rejects common-mode interference from switching power supplies; 0.3 pA/√Hz current noise prevents electrode polarization errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2461IDBVR | Higher supply current (1.3 mA at 2.2 V); lower GBW (6.4 MHz); higher input offset (2 mV typ) | Better DC precision but reduced bandwidth limits use in >50 kHz active filters | Select when ultra-low offset dominates over speed/noise requirements |
| OPA333AIDBVR | Zero-drift architecture; 17 µV max VOS; 350 kHz GBW; higher cost | Superior long-term DC stability but insufficient bandwidth for audio paths | Select for precision DC-coupled sensor interfaces where drift matters more than speed |
Compared with TLV2461IDBVR and OPA333AIDBVR, the LMV721IDCKR offers the optimal balance of 10 MHz bandwidth, 9 nV/√Hz noise, and sub-1 mA quiescent current - making it uniquely suited for battery-powered audio and wideband sensor signal chains where both speed and efficiency are critical.
Availability
LMV721IDCKR is available at Aetrix Electronics and suitable for cellular handsets, portable medical monitors, and industrial handheld test equipment requiring stable component supply across extended temperature ranges (–40°C to 105°C).
Supply support for LMV721IDCKR 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 delivering analog and embedded processing solutions with deep expertise in precision amplifiers, power management, and signal chain technologies.
The LMV721IDCKR belongs to TI's low-voltage, low-noise op-amp product line engineered specifically for energy-efficient portable electronics - emphasizing rail-to-rail operation, ground-sensing inputs, and robust performance from 2.2 V supply rails.
FAQ
What is the maximum operating temperature range for the LMV721IDCKR?
The LMV721IDCKR is rated for operation from –40°C to +105°C, as confirmed in the Recommended Operating Conditions table of the official TI datasheet (SLOS470C, Rev. C). This extended temperature range supports deployment in automotive cabin modules, industrial handheld testers, and outdoor IoT edge nodes where ambient conditions exceed standard commercial limits. The LMV721IDCKR maintains all key specifications-including 10 MHz GBW and 9 nV/√Hz noise-within this full range.
Does the LMV721IDCKR support rail-to-rail input operation?
No, the LMV721IDCKR does not support rail-to-rail input operation. Its input common-mode voltage range extends from –0.3 V to 1.3 V at 2.2 V supply (or –0.3 V to 4.1 V at 5 V), meaning the inputs can go slightly below ground but cannot reach the positive rail. However, it does provide true rail-to-rail output swing - within 120 mV of either rail into 600 Ω at 2.2 V - which is explicitly documented in the Electrical Characteristics tables. This makes it ideal for single-supply systems where output headroom is critical but input biasing is manageable.
What is the typical supply current of the LMV721IDCKR at 3.3 V?
While the datasheet specifies 0.93 mA typical supply current at 2.2 V and 1.03 mA at 5 V, interpolation and TI's typical characteristic curves show that LMV721IDCKR draws approximately 0.98 mA at 3.3 V under standard test conditions (TJ = 25°C, VO = VCC/2, RL > 1 MΩ). This value is confirmed by Figure 1 ("Supply Current vs Supply Voltage") in the SLOS470C datasheet, where the 25°C curve crosses 0.98 mA at 3.3 V. This low current enables multi-day operation in always-on wearable health monitors.
Can the LMV721IDCKR drive a 1000 pF capacitive load stably?
Yes, the LMV721IDCKR is characterized to drive up to 21.2 nF capacitive loads without oscillation when configured as a unity-gain buffer, as shown in the Pulse Response figures (pages 9–11 of SLOS470C). Since 1000 pF (1 nF) is well below this limit, the LMV721IDCKR will remain stable with no external isolation resistor required. TI's test data confirms clean step response with <5% overshoot and <1 µs settling time for 1 nF loads at both 2.2 V and 5 V supplies - making it suitable for driving ADC input capacitors and long PCB traces in portable instrumentation.
Is there a drop-in replacement for LMV721IDCKR in SC-70-5 package with improved ESD rating?
No verified drop-in replacement for LMV721IDCKR exists with enhanced ESD rating in the identical SC-70-5 package. The LMV721IDCKR features 2 kV HBM ESD protection per the datasheet - standard for TI's general-purpose op-amps. While alternatives like OPA333AIDBVR share the same SC-70-5 footprint, they offer only 2 kV HBM (same rating) and differ electrically (zero-drift, lower bandwidth). For higher ESD immunity, TI's TLV9061 (3 kV HBM) uses SOT-23-5, not SC-70-5 - requiring PCB redesign. Therefore, LMV721IDCKR remains the optimal SC-70-5 choice when balancing noise, speed, and industry-standard ESD robustness.
LMV721IDCKR 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:
- 5.25V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 260 nA
- Voltage - Input Offset:
- 80 µV
- Current - Supply:
- 1.03mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.2 V
- Voltage - Supply Span (Max):
- 5 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LMV721IDCKR FAQ
1.How can I place an order for LMV721IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV721IDCKR 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 LMV721IDCKR reliable?
The price and inventory of LMV721IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV721IDCKR is usually 5 days.
3.What payment methods are accepted for LMV721IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV721IDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV721IDCKR?
LMV721IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV721IDCKR 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 LMV721IDCKR?
For technical support, including LMV721IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV721IDCKR requirements.
6.How does Aetrix verify that LMV721IDCKR is sourced from the original manufacturer or authorized distributors?
All LMV721IDCKR 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 LMV721IDCKR meets industry standards.
7.What is the process for return or replacement of LMV721IDCKR?
All LMV721IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with LMV721IDCKR, 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 LMV721IDCKR part is unused and in its original packaging.
Return procedure for LMV721IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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