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Texas Instruments LMV712TLX/NOPB
- Part No.:
- LMV712TLX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-WFBGA, DSBGA
- Datasheet:
-
LMV712TLX/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 10DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,454
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Product details
Overview
LMV712TLX/NOPB from Texas Instruments is a dual rail-to-rail input/output operational amplifier with independent shutdown control per channel, 5-MHz gain-bandwidth product, 5 V/µs slew rate, and 20 nV/√Hz input voltage noise - designed for precision power amplifier control loops in GSM/UMTS RF front-ends.
For engineers reviewing the LMV712TLX/NOPB datasheet, LMV712TLX/NOPB pinout, LMV712TLX/NOPB application, or LMV712TLX/NOPB equivalent, key selection criteria include shutdown current (≤1.5 µA), turnon time (2.2 µs), rail-to-rail output swing at 2.7 V supply, and capacitive load tolerance up to 200 pF without external compensation.
Technical Context
The LMV712TLX/NOPB uses parallel NMOS/PMOS input stages to achieve rail-to-rail input operation across –0.3 V to V+ + 0.3 V, with VOS crossover behavior near 1.4 V above V–. Its folded-cascode gain stage and Class AB output stage deliver stable unity-gain performance with 60° phase margin.
Independent SDA and SDB pins enable per-channel shutdown, reducing total supply current to ≤1.5 µA while holding outputs at V–. Output recovery is glitch-free, critical for RF PA bias control where transient spikes cause spectral emissions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 5 MHz - supports closed-loop bandwidth up to ~400 kHz in unity-gain buffer configuration for PA envelope tracking. |
| Slew rate | 5 V/µs - enables fast settling of dynamic PA bias signals without distortion in GSM burst-mode operation. |
| Input voltage noise | 20 nV/√Hz at 1 kHz - low enough to avoid degrading SNR in sensitive RF detector or feedback paths. |
| Supply current per channel | 1.22 mA (typ) at 2.7 V - allows dual-channel operation within tight battery-power budgets of portable transceivers. |
| Shutdown current | 1.5 µA (max) per channel - reduces system standby power by >99% when PA is inactive. |
| Output swing | Rail-to-rail: 2.62 V high / 0.01 V low (2.7 V supply, 10 kΩ load) - maximizes dynamic range for analog PA gain control. |
| Capacitive load drive | 200 pF (unity-gain stable) - eliminates need for isolation resistors in typical RF coupler detector interfaces. |
Pinout & Package
LMV712TLX/NOPB is packaged in a 10-pin WSON (NGY) package, 3.0 mm × 3.0 mm body size, with exposed thermal pad connected to V– or left floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Channel A output | Drives PA bias node or detector amplifier input; rail-to-rail swing ensures full DAC utilization. |
| 2 (–INA) | Channel A inverting input | Accepts feedback signal from directional coupler or PA collector current sense resistor. |
| 3 (+INA) | Channel A noninverting input | Receives reference voltage (e.g., from DAC or temperature-compensated bandgap). |
| 4 (V–) | Negative supply | Ground reference for single-supply operation; thermal pad must be soldered to PCB ground plane. |
| 5 (SDA) | Channel A shutdown | Logic-low (<0.8 V) disables Channel A; 2.2 µs turnon ensures clean PA ramp-up without RF glitches. |
| 6 (SDB) | Channel B shutdown | Independent control for second channel - enables dual-path PA control or redundancy schemes. |
| 7 (+INB) | Channel B noninverting input | Supports dual-loop architectures (e.g., forward + reflected power control). |
| 8 (–INB) | Channel B inverting input | Connects to secondary detector path (e.g., antenna mismatch monitoring). |
| 9 (OUTB) | Channel B output | Provides isolated control path - avoids crosstalk between transmit/receive or diversity PA stages. |
| 10 (V+) | Positive supply | Operates from 2.7 V to 5.5 V - compatible with Li-ion battery or regulated 3.3 V rails. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full utilization of 2.7 V supply in battery-powered RF modules without level-shifting circuitry. |
| Independent shutdown | Per-channel disable allows dynamic power gating - e.g., disable Channel B during receive-only intervals. |
| Glitch-free turnon | Smooth output ramp prevents spurious RF emissions during PA activation in TDMA systems. |
| 200-pF capacitive load drive | Direct interface to RF coupler output capacitance eliminates external isolation components and layout area. |
| Low 20-nV/√Hz noise | Maintains signal integrity in high-gain detector amplifiers where noise dominates dynamic range. |
Applications
| GSM Power Amplifier Control Loop | RF Directional Coupler Detector |
|---|---|
Use Scenario: Closed-loop bias control of GSM PA during TDMA burst transmission, maintaining constant output power across battery voltage sag and temperature drift. IC Role / Device Role / Timing Role: Dual op-amp implements error amplifier (Channel A) and temperature-compensation integrator (Channel B); shutdown pins synchronize with TX enable timing. Use Value: 2.2 µs turnon ensures PA bias settles before RF carrier onset, eliminating spectral regrowth and meeting GSM mask requirements. | Use Scenario: Converting coupled RF signal from directional coupler into DC voltage proportional to forward/reflected power for SWR monitoring. IC Role / Device Role / Timing Role: Channel A buffers detector diode output; Channel B conditions rectified signal with rail-to-rail swing into ADC input range. Use Value: 20 nV/√Hz noise floor preserves small-signal accuracy down to –30 dBm coupled power levels. |
| Cellular Handset Front-End | Wireless LAN Power Management |
Use Scenario: Multi-band handset supporting GSM/UMTS/WCDMA, requiring compact, low-power op-amps for PA bias and envelope tracking. IC Role / Device Role / Timing Role: Single LMV712TLX/NOPB replaces two discrete op-amps; shutdown pins enable band-specific PA activation. Use Value: 10-pin WSON footprint (3 mm × 3 mm) saves >40% board area versus dual SO-8 solutions. | Use Scenario: Dynamic output power adjustment in 802.11n/ac WLAN transceivers based on link quality and regulatory limits. IC Role / Device Role / Timing Role: Channel A sets PA gain; Channel B monitors PA drain current for thermal foldback - both controlled via shared SPI DAC. Use Value: 5-MHz GBW supports fast loop response (<1 µs settling) required for OFDM symbol-level power adaptation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise RRIO op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV722QDR | No shutdown function; higher supply current (1.5 mA/channel); same GBW and noise. | Lacks per-channel power gating - unsuitable for burst-mode PA control requiring glitch-free startup. | Select when shutdown is unnecessary and cost is prioritized over dynamic power control. |
| OPA2333AIDR | Zero-drift architecture; lower VOS (10 µV max); higher supply current (17 µA/channel in shutdown). | Better DC accuracy but slower turnon (>100 µs); not optimized for RF transient response. | Select for precision sensor signal chains, not RF PA bias where speed and glitch immunity dominate. |
Compared with LMV722QDR and OPA2333AIDR, LMV712TLX/NOPB uniquely balances 5-V/µs slew rate, 2.2-µs turnon, and 1.5-µA shutdown current - making it the only option qualified for GSM/UMTS PA control where RF spectral purity depends on analog loop dynamics.
Availability
LMV712TLX/NOPB is available at Aetrix Electronics and suitable for GSM power amplifier control loops, RF directional coupler detectors, cellular handset front-ends, wireless LAN power management, and portable radio systems requiring stable component supply and guaranteed long-term manufacturability.
Supply support for LMV712TLX/NOPB 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 communications markets.
The LMV712TLX/NOPB belongs to TI's low-power, low-noise, rail-to-rail op-amp product line - engineered specifically for battery-operated RF and portable communication systems demanding precision, speed, and ultra-low standby power.
FAQ
What is the maximum capacitive load the LMV712TLX/NOPB can drive without oscillation?
The LMV712TLX/NOPB is unity-gain stable driving up to 200 pF directly at its output. This capability eliminates external isolation resistors in typical RF detector interfaces, such as those connected to directional couplers. Exceeding 200 pF requires adding an isolation resistor (RISO) per TI's recommended circuit in Figure 32 of the LMV712TLX/NOPB datasheet. The 200-pF rating applies across the full operating temperature range (–40°C to 125°C) and supply voltages (2.7 V to 5.5 V).
Does the LMV712TLX/NOPB support true rail-to-rail input common-mode range?
Yes, the LMV712TLX/NOPB supports rail-to-rail input with a common-mode voltage range from (V–) – 0.3 V to (V+) + 0.3 V. This is achieved using parallel NMOS and PMOS input differential pairs, with internal logic selecting the active pair based on VCM. However, input offset voltage (VOS) exhibits a crossover near 1.4 V above V–, so high-accuracy designs should avoid this region. The specification is verified across –40°C to 125°C and 2.7 V to 5.5 V supply.
What is the typical turnon time from shutdown for the LMV712TLX/NOPB?
The LMV712TLX/NOPB has a typical turnon time of 2.2 µs from shutdown to full output functionality at 25°C and 2.7 V supply. This value increases to 4.6 µs over the full temperature range (–40°C to 125°C). The output ramps smoothly without glitches - a critical feature for RF power amplifier control where transient spikes cause out-of-band emissions. Turnon time is measured from SDA/SDB rising above VSD(on) (2.4 V min at 2.7 V supply) to output settling within 1% of final value.
How does the shutdown function behave on the LMV712TLX/NOPB outputs?
When either SDA or SDB is pulled low (<0.8 V), the corresponding amplifier channel shuts down and its output is actively driven to V– (ground in single-supply configurations). This behavior is confirmed in the LMV712TLX/NOPB datasheet Section 7.4.1 and electrical characteristics table (VO(SD) = 10–200 mV). The output remains at V– during shutdown, preventing floating nodes that could couple noise into sensitive RF paths. Both channels can be shut down simultaneously or independently.
Is the LMV712TLX/NOPB qualified for automotive applications?
No, the LMV712TLX/NOPB is not AEC-Q100 qualified. It is the commercial-grade variant of the LMV712-N family. For automotive use, TI offers the LMV712-N-Q1 (AEC-Q100 Grade 1, –40°C to 125°C), which shares identical electrical specifications but undergoes additional qualification testing. The LMV712TLX/NOPB is rated for –40°C to 85°C operation and is intended for industrial, portable, and communications equipment - not safety-critical automotive systems.
LMV712TLX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMV®
- Package/Case:
- 10-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 1.22mA (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
LMV712TLX/NOPB FAQ
1.How can I place an order for LMV712TLX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV712TLX/NOPB 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 LMV712TLX/NOPB reliable?
The price and inventory of LMV712TLX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV712TLX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV712TLX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV712TLX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV712TLX/NOPB?
LMV712TLX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV712TLX/NOPB 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 LMV712TLX/NOPB?
For technical support, including LMV712TLX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV712TLX/NOPB requirements.
6.How does Aetrix verify that LMV712TLX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV712TLX/NOPB 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 LMV712TLX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV712TLX/NOPB?
All LMV712TLX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV712TLX/NOPB, 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 LMV712TLX/NOPB part is unused and in its original packaging.
Return procedure for LMV712TLX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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