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Texas Instruments LMH6725MA/NOPB
- Part No.:
- LMH6725MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6725MA/NOPB.pdf
- Description:
- IC OPAMP CFA 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,997
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Product details
Overview
LMH6725MA/NOPB from Texas Instruments is a single-channel, current-feedback operational amplifier optimized for high-speed video and analog signal conditioning. It delivers 370 MHz unity-gain bandwidth (−3 dB), 600 V/μs slew rate, and 0.03% differential gain / 0.11° differential phase at 4.43 MHz - enabling NTSC/PAL-compliant line driving and A/D conversion in portable video systems.
For engineers reviewing the LMH6725MA/NOPB datasheet, LMH6725MA/NOPB pinout, LMH6725MA/NOPB application, or LMH6725MA/NOPB equivalent, this device supports ±2.5V to ±5V dual-supply operation, achieves 0.1 dB gain flatness to 100 MHz, and provides 110 mA linear output current - critical for driving 75-Ω video loads and high-speed ADC inputs without external buffers.
Technical Context
The LMH6725MA/NOPB employs TI's VIP10 complementary bipolar process and uses a current-feedback architecture with low-impedance inverting input (~500 Ω) and high-impedance non-inverting input (~100 kΩ). Its bandwidth remains stable across gains of +1 to +5 V/V when using appropriate feedback resistors (e.g., 1.2 kΩ at AV = +2).
It operates over −40°C to +85°C, supports single-supply (4.5–12 V) or split-supply (±2.5 V to ±5 V) configurations, and features no internal ground reference - enabling flexible PCB layout for portable and battery-powered applications requiring low quiescent current (1.2 mA typical per amplifier).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 370 MHz (−3 dB); enables wideband signal amplification up to UHF without gain peaking or instability |
| Slew Rate | 600 V/μs; supports clean 4-V step response with 2.5 ns rise/fall time for fast transient fidelity |
| Differential Gain / Phase | 0.03% / 0.11° at 4.43 MHz; meets NTSC broadcast video accuracy requirements without post-correction |
| Supply Current | 1.2 mA per amplifier at ±5 V; allows integration into power-constrained portable designs |
| Output Current | 110 mA linear sourcing/sinking; drives 75-Ω video lines or 100-Ω ADC inputs directly |
| Gain Flatness | 0.1 dB to 100 MHz; ensures minimal amplitude distortion across baseband video spectrum |
| Input Voltage Noise | 4.3 nV/√Hz above 1 MHz; preserves SNR in high-frequency signal chains |
Pinout & Package
LMH6725MA/NOPB is packaged in an 8-pin SOIC (D08A) with nominal body size 4.90 mm × 3.91 mm and standard JEDEC MS-012 footprint. Thermal resistance is 166°C/W (junction-to-ambient).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Amplifier output | Low-impedance (0.01 Ω closed-loop) driver capable of 110 mA linear current into 100-Ω loads |
| 2: −IN | Inverting input | ~500 Ω input impedance; sets feedback path gain and stability via RF selection (e.g., 1.2 kΩ) |
| 3: +IN | Non-inverting input | ~100 kΩ high-impedance node; used for signal injection in non-inverting configurations |
| 4: V− | Negative supply rail | Accepts −2.5 V to −5 V; no internal ground reference enables true single/dual supply flexibility |
| 5: V+ | Positive supply rail | Accepts +2.5 V to +5 V; supports rail-to-rail output swing within ±1.4 V of rails (RL = ∞) |
| 6, 7, 8: NC | No-connect terminals | Unused pins; must be left floating or tied to GND per layout best practices to minimize parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback architecture | Enables constant bandwidth vs. gain when RF is properly selected - unlike voltage-feedback op amps |
| 0.1 dB gain flatness to 100 MHz | Preserves composite video spectral integrity without equalization circuitry |
| NTSC/PAL-qualified video performance | 0.03% DG / 0.11° DP eliminates need for external gain/phase correction in broadcast-grade line drivers |
| Single-supply compatibility (4.5–12 V) | Supports direct integration into 5-V embedded systems without level-shifting or charge pumps |
| Low 1.2 mA quiescent current | Extends battery life in portable DVD players, handheld scopes, and field-deployable test equipment |
Applications
| Video Line Driver | A/D Converter Driver |
|---|---|
|
Use Scenario: Driving 75-Ω coaxial cable from FPGA video DAC output to monitor or encoder IC. IC Role / Device Role / Timing Role: High-fidelity buffer amplifier maintaining signal integrity across DC–100 MHz baseband. Use Value: Eliminates need for discrete emitter-follower stages while delivering 0.03% differential gain compliance. |
Use Scenario: Conditioning analog sensor output before sampling by 10-bit, 50-MSPS ADC. IC Role / Device Role / Timing Role: Wideband gain stage with fast settling (30 ns to 0.05%) and low noise (4.3 nV/√Hz). Use Value: Enables full-scale utilization of ADC ENOB without harmonic distortion degradation (HD2/HD3 > −63 dBc). |
| Portable Video Playback | High-Speed Oscilloscope Front-End |
|
Use Scenario: Output stage in handheld media player feeding HDMI transmitter or analog CVBS output. IC Role / Device Role / Timing Role: Low-power, high-slew-rate driver operating from single 5-V supply. Use Value: Delivers 110 mA output current at 1.2 mA quiescent draw - extending runtime without sacrificing video fidelity. |
Use Scenario: First-stage amplification in 200-MHz bandwidth oscilloscope channel. IC Role / Device Role / Timing Role: Current-feedback gain block providing flat frequency response and minimal group delay variation. Use Value: Achieves 260 MHz small-signal bandwidth at AV = +2, supporting accurate pulse and edge reproduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6723MA/NOPB | Identical electrical specs and pinout; same SOIC-8 package; LMH6725 is functionally identical but rebranded per TI revision history (LMH6725 removed from title in Rev I, Aug 2014) | Same video, A/D driver, and portable line-driving use cases; no functional divergence in published data | Select LMH6723MA/NOPB if LMH6725MA/NOPB is unavailable - verified drop-in replacement per TI documentation |
| THS3201DR | Higher 1.8-GHz GBW but 12-mA supply current; 100 mA output; not unity-gain stable; requires external compensation | Better suited for RF IF amplification or ultra-wideband instrumentation where power budget permits | Choose THS3201DR only when >1-GHz bandwidth is required and 12× higher supply current is acceptable |
Compared with LMH6725MA/NOPB, LMH6723MA/NOPB offers identical performance and pin compatibility, while THS3201DR trades power efficiency for bandwidth - making LMH6725MA/NOPB optimal for portable, battery-sensitive, video-accurate applications.
Availability
LMH6725MA/NOPB is available at Aetrix Electronics and suitable for portable video playback, high-speed A/D converter driving, and NTSC/PAL line driving requiring stable component supply and long-term production continuity.
Supply support for LMH6725MA/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 specializing in analog, embedded processing, and high-performance signal chain solutions with broad industrial, automotive, and communications reach.
The LMH6725MA/NOPB belongs to TI's high-speed current-feedback op amp product line, engineered specifically for portable video, instrumentation, and data acquisition systems demanding low power, wide bandwidth, and broadcast-grade video fidelity.
FAQ
What is the recommended feedback resistor value for LMH6725MA/NOPB at a gain of +2 V/V?
The LMH6725MA/NOPB datasheet specifies 1.2 kΩ as the recommended feedback resistor (RF) for AV = +2 V/V with ±5 V supplies. This value balances bandwidth, gain flatness, and stability - yielding ~0.1 dB peaking and maximal −3 dB bandwidth. Lower RF values (e.g., 800 Ω) increase bandwidth but risk overshoot; higher values reduce bandwidth and degrade phase margin. LMH6725MA/NOPB requires external RF; it cannot operate with direct output-to-inverting-input connection.
Does LMH6725MA/NOPB support single-supply operation?
Yes, LMH6725MA/NOPB supports single-supply operation from 4.5 V to 12 V. Its input common-mode range extends to within 1.4 V of either rail (±1.45 V at ±2.5 V), and output swings to within 1.25 V of each rail under 100-Ω load. No internal ground reference means biasing is fully design-dependent - users must set DC operating point via external resistive networks. LMH6725MA/NOPB maintains full AC performance across this supply range.
What is the maximum capacitive load LMH6725MA/NOPB can drive without external isolation?
LMH6725MA/NOPB should not drive >10 pF capacitive load directly. For larger loads (e.g., 47–100 pF), a series output resistor (ROUT) is mandatory: 30 Ω for 47 pF and 24 Ω for 100 pF at ±5 V supply, per TI's "Suggested ROUT vs. CL" curves. Without ROUT, capacitive loading causes peaking, ringing, or oscillation due to phase shift at the output node. LMH6725MA/NOPB's closed-loop output resistance is only 0.01 Ω - making it highly sensitive to load capacitance.
Is LMH6725MA/NOPB pin-compatible with LMH6723 or LMH6724?
LMH6725MA/NOPB is pin-compatible with LMH6723MA/NOPB (single-channel, SOIC-8) but not with LMH6724MA/NOPB (dual-channel, SOIC-8). Pin mapping matches exactly: OUT (1), −IN (2), +IN (3), V− (4), V+ (5), and NC (6–8). TI's revision history confirms LMH6725 was removed from documentation in favor of LMH6723, indicating functional and mechanical equivalence. LMH6725MA/NOPB may be substituted for LMH6723MA/NOPB without PCB changes.
What video standards does LMH6725MA/NOPB meet out-of-the-box?
LMH6725MA/NOPB meets NTSC and PAL broadcast video specifications without external tuning: 0.03% differential gain and 0.11° differential phase at 4.43 MHz into 150-Ω load, per TI's characterization. Its 0.1 dB gain flatness to 100 MHz and 260 MHz small-signal bandwidth at AV = +2 ensure minimal luma/chroma crosstalk and timing skew. LMH6725MA/NOPB is validated for composite video line driving, S-video Y/C separation paths, and RGB component buffering in consumer and prosumer gear.
LMH6725MA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 600V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 370 MHz
- Current - Input Bias:
- 2 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 1mA (x4 Channels)
- Current - Output / Channel:
- 110 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LMH6725MA/NOPB FAQ
1.How can I place an order for LMH6725MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6725MA/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 LMH6725MA/NOPB reliable?
The price and inventory of LMH6725MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6725MA/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6725MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6725MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6725MA/NOPB?
LMH6725MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6725MA/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 LMH6725MA/NOPB?
For technical support, including LMH6725MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6725MA/NOPB requirements.
6.How does Aetrix verify that LMH6725MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6725MA/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 LMH6725MA/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6725MA/NOPB?
All LMH6725MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6725MA/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 LMH6725MA/NOPB part is unused and in its original packaging.
Return procedure for LMH6725MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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