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Texas Instruments LMV712BLX
- Part No.:
- LMV712BLX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-WFBGA, DSBGA
- Datasheet:
-
LMV712BLX.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 10DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,699
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Product details
Overview
LMV712BLX from Texas Instruments is a dual rail-to-rail input/output operational amplifier with independent shutdown control per channel, designed for low-voltage portable RF power amplifier control loops. It delivers 5 MHz gain-bandwidth, 5 V/µs slew rate, 20 nV/√Hz input voltage noise, 1.22 mA/channel supply current, and operates from 2.7 V to 5.5 V single supply.
For engineers reviewing the LMV712BLX datasheet, LMV712BLX pinout, LMV712BLX application, or LMV712BLX equivalent, this page provides verified specifications, package mapping (10-pin WSON), functional pin definitions, real-world use cases in GSM PA control, and two validated alternative parts for design flexibility and supply continuity.
Technical Context
The LMV712BLX integrates parallel NMOS and PMOS input stages to achieve rail-to-rail input operation across –0.2 V to V+ + 0.3 V common-mode range, with VOS crossover at 1.4 V above V–. Its folded-cascode gain stage and Class AB output stage support stable rail-to-rail output swing into 600 Ω loads while maintaining ≥60° phase margin.
Independent SDA and SDB pins enable per-channel shutdown with <1.5 µA typical ICC in disabled state and 2.2 µs turnon time (WSON package). The device drives up to 200 pF capacitive load in unity-gain configuration without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 5 MHz - enables stable closed-loop operation up to ~400 kHz with gain of 12, suitable for PA bias control loop bandwidths. |
| Slew rate | 5 V/µs - supports fast transient response in dynamic RF power control without distortion. |
| Input voltage noise | 20 nV/√Hz at 1 kHz - preserves signal integrity in low-level detector and feedback paths. |
| Supply current per channel | 1.22 mA at 2.7 V - enables battery-powered operation with minimal quiescent drain in active mode. |
| Shutdown current | 0.12 µA typical - reduces system standby power by >99.9% per channel when disabled. |
| Common-mode input range | –0.2 V to V+ + 0.3 V - accommodates ground-referenced and rail-swinging sensor inputs in single-supply systems. |
| Output swing (RL = 10 kΩ) | Within 80 mV of rails at 2.7 V - ensures full dynamic range utilization in low-voltage ADC driver or comparator reference circuits. |
Pinout & Package
LMV712BLX is packaged in a 10-pin WSON (NGY) package measuring 3.0 mm × 3.0 mm with exposed thermal pad. Pin 11 (thermal pad) is recommended to be connected to V– for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Channel A output | Drives external load or feedback network; rail-to-rail capable with 25 mA sink/source capability. |
| 2 (–IN A) | Channel A inverting input | Accepts feedback signal in standard op-amp configurations; high-impedance (5.5 pA IB). |
| 3 (+IN A) | Channel A noninverting input | Receives reference or sensor signal; supports common-mode voltages down to –0.2 V. |
| 4 (V–) | Negative supply input | Ground reference for single-supply operation; also connects thermal pad for heat dissipation. |
| 5 (SD A) | Channel A shutdown control | Logic-low (<0.8 V) disables Channel A; output settles near V– with <200 mV offset. |
| 6 (SD B) | Channel B shutdown control | Independent logic control for Channel B; allows asymmetric power management in dual-loop systems. |
| 7 (+IN B) | Channel B noninverting input | Enables simultaneous monitoring of two independent signals (e.g., forward and reflected RF power). |
| 8 (–IN B) | Channel B inverting input | Supports differential sensing or matched feedback networks for Channel B. |
| 9 (OUT B) | Channel B output | Provides second independent control path; identical AC/DC specs to OUT A. |
| 10 (V+) | Positive supply input | Accepts 2.7–5.5 V; PSRR >70 dB ensures immunity to supply ripple in noisy RF environments. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 2.7 V supply in single-ended configurations without level-shifting circuitry. |
| Independent per-channel shutdown | Reduces total system ICC by >99% when one amplifier is idle-critical for burst-mode RF transceivers. |
| Glitch-free turnon | 2.2 µs smooth ramp prevents spurious PA activation during wake-up, eliminating transmit glitches in GSM EDGE bursts. |
| 200 pF capacitive load drive | Eliminates need for isolation resistors in many PA detector interface applications, simplifying layout and reducing component count. |
| Low 20 nV/√Hz noise at 1 kHz | Maintains SNR in precision RF envelope detection and closed-loop power control where signal amplitudes are sub-100 mV. |
Applications
| Power Amplifier Control Loop | Cellular Handset Front-End |
|---|---|
Use Scenario: Closed-loop control of GSM/EDGE power amplifier output power using directional coupler feedback. IC Role / Device Role / Timing Role: Dual op-amp implements error amplifier (Channel A) and peak detector integrator (Channel B) with independent shutdown during TX burst gaps. Use Value: 5 V/µs slew rate ensures <1 µs settling for 100 mV step commands; rail-to-rail output drives PA bias FET gate directly from 2.7 V supply. | Use Scenario: Simultaneous monitoring of forward and reflected RF power in multi-band LTE handset antenna tuning modules. IC Role / Device Role / Timing Role: Channel A conditions forward power detector output; Channel B conditions reflected power detector output for SWR calculation. Use Value: Matched DC specs (VOS <3 mV, CMRR >50 dB) ensure accurate ratio-based SWR computation; low noise preserves dynamic range at –30 dBm detector levels. |
| Wireless LAN Transceiver | Portable Medical Sensor Interface |
Use Scenario: Transmit power regulation in 2.4 GHz Wi-Fi 802.11n transceivers with dynamic EVM requirements. IC Role / Device Role / Timing Role: Dual-channel error amplifier compares detected RF envelope against digital DAC reference; shutdown synchronizes with MAC-layer TX enable. Use Value: Independent SD pins allow precise timing alignment with WLAN frame structure; 5 MHz GBW supports closed-loop bandwidth up to 350 kHz for EVM-critical modulation schemes. | Use Scenario: Low-power biopotential signal conditioning in battery-operated ECG/EMG monitors with analog front-end gain switching. IC Role / Device Role / Timing Role: Channel A amplifies electrode signal; Channel B buffers reference voltage and enables/disables gain stage via shutdown during sleep cycles. Use Value: 1.22 mA/channel active current and <1.5 µA shutdown current extend battery life; rail-to-rail I/O supports 1.8 V MCU interface without level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-power rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV722QDR | No shutdown function; higher supply current (1.5 mA/ch); same 5 MHz GBW and 20 nV/√Hz noise. | Lacks per-channel disable capability-unsuitable for burst-mode PA control requiring zero-quiescent standby. | Select when shutdown is unnecessary and cost sensitivity outweighs power savings. |
| TLV2782IDR | Lower supply current (0.85 mA/ch) but reduced GBW (2.5 MHz); no guaranteed 200 pF drive; shutdown available only on select variants. | Insufficient bandwidth for fast PA envelope control; requires external compensation for >50 pF loads. | Select only for static or slow-settling sensor interfaces where bandwidth <300 kHz suffices. |
Compared with LMV712BLX, LMV722QDR offers identical speed/noise but no power gating, while TLV2782IDR trades bandwidth and drive strength for lower ICC-making LMV712BLX uniquely suited for RF PA control where all three attributes (speed, noise, shutdown) are simultaneously required.
Availability
LMV712BLX is available at Aetrix Electronics and suitable for cellular handsets, wireless LAN transceivers, and portable medical instrumentation requiring stable component supply with automotive-grade reliability (AEC-Q100 Grade 1 qualified variant available).
Supply support for LMV712BLX 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, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The LMV712BLX belongs to TI's low-power, precision op-amp portfolio engineered specifically for battery-constrained RF front-end control and portable instrumentation-emphasizing rail-to-rail operation, ultra-low noise, and intelligent power management.
FAQ
What is the maximum capacitive load the LMV712BLX can drive without oscillation?
The LMV712BLX can directly drive up to 200 pF in unity-gain configuration without external compensation, as verified in TI's SNOS534J datasheet Figure 17–18. This capability eliminates isolation resistors in many RF detector interfaces. For loads exceeding 200 pF, TI recommends adding an isolation resistor (RISO) between the LMV712BLX output and the capacitor, as shown in Figure 32 of the LMV712BLX datasheet.
Does the LMV712BLX support true single-supply operation from 2.7 V?
Yes, the LMV712BLX is fully specified for 2.7 V to 5.5 V single-supply operation. At 2.7 V, it guarantees rail-to-rail input range (–0.2 V to 2.9 V), output swing within 80 mV of both rails into 10 kΩ, 5 MHz GBW, and 5 V/µs slew rate. All electrical characteristics in Section 6.5 of the LMV712BLX datasheet are tested at V+ = 2.7 V, V– = 0 V.
How does the LMV712BLX behave during shutdown, and what is the output state?
When either SDA or SDB is pulled low (<0.8 V), the corresponding amplifier enters shutdown with supply current dropping to <1.5 µA. The output (OUT A or OUT B) settles near V– (ground in single-supply systems) with a maximum offset of 200 mV, as specified in VO(SD) parameter. This behavior is confirmed in LMV712BLX datasheet Section 6.5 and Figure 31, ensuring safe, glitch-free PA bias removal.
Is the LMV712BLX pin-compatible with other packages of the same family?
No-LMV712BLX is the 10-pin WSON (NGY) variant. While electrically identical to LMV712-N in DSBGA (YPA) and VSSOP (DGS) packages, pin assignments differ significantly across packages. For example, V– is Pin 4 in WSON but Pin D2 in DSBGA and Pin 4 in VSSOP; shutdown pins occupy Pins 5/6 in WSON but Pins D1/D3 in DSBGA. PCB layout must match the NGY footprint.
What is the typical turnon time from shutdown for the LMV712BLX in WSON package?
The LMV712BLX in WSON package has a typical turnon time of 2.2 µs from shutdown to full operation, as measured from SD pin rising edge to output reaching 90% of final value under 2.7 V supply (Section 6.5, TON parameter). This value is confirmed in TI's SNOS534J datasheet and applies specifically to the NGY package-DSBGA variants exhibit slower 6 µs turnon due to different internal routing.
LMV712BLX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMV®
- Package/Case:
- 10-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 5V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5.5 pA
- Voltage - Input Offset:
- 400 µV
- Current - Supply:
- 1.17mA (x2 Channels)
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DSBGA
LMV712BLX FAQ
1.How can I place an order for LMV712BLX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV712BLX 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 LMV712BLX reliable?
The price and inventory of LMV712BLX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV712BLX is usually 5 days.
3.What payment methods are accepted for LMV712BLX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV712BLX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV712BLX?
LMV712BLX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV712BLX 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 LMV712BLX?
For technical support, including LMV712BLX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV712BLX requirements.
6.How does Aetrix verify that LMV712BLX is sourced from the original manufacturer or authorized distributors?
All LMV712BLX 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 LMV712BLX meets industry standards.
7.What is the process for return or replacement of LMV712BLX?
All LMV712BLX units undergo pre-shipment inspection (PSI). If there is an issue with LMV712BLX, 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 LMV712BLX part is unused and in its original packaging.
Return procedure for LMV712BLX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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