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Texas Instruments LMH6723MFX/NOPB
- Part No.:
- LMH6723MFX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMH6723MFX/NOPB.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,507
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Product details
Overview
LMH6723MFX/NOPB from Texas Instruments is a single-channel, current-feedback operational amplifier optimized for high-speed video and portable signal conditioning. It delivers 370 MHz unity-gain bandwidth (−3 dB), 600 V/μs slew rate, and 110 mA linear output current while consuming only 1.2 mA supply current at ±5 V. Its 0.03% differential gain and 0.11° differential phase meet NTSC/PAL video line driver requirements.
For engineers reviewing the LMH6723MFX/NOPB datasheet, LMH6723MFX/NOPB pinout, LMH6723MFX/NOPB application, or LMH6723MFX/NOPB equivalent, key selection criteria include small-signal bandwidth at AV = +2 (260 MHz), −3 dB bandwidth at AV = 1 (370 MHz), differential video performance, SOT-23 package thermal resistance (230°C/W), and current-feedback architecture requiring precise feedback resistor selection (e.g., 1200 Ω for AV = +2).
Technical Context
The LMH6723MFX/NOPB uses Texas Instruments' VIP10 complementary bipolar process to achieve high-speed current-feedback operation with no internal ground reference-enabling flexible single-supply (4.5–12 V) or split-supply (±2.5 V to ±6 V) configurations. Its inverting input presents ~500 Ω impedance, and non-inverting input exhibits 1.5 pF capacitance and 100 kΩ resistance.
Unlike voltage-feedback op amps, its closed-loop bandwidth is set primarily by feedback resistor value-not gain-allowing stable operation across gains +1 to +5 V/V and −1 to −4 V/V when RF is selected per gain-dependent curves. Output drive capability includes 0.01 Ω closed-loop output resistance and ±4.1 V output swing into high-Z loads at ±5 V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 370 MHz (−3 dB, AV = 1, VOUT = 0.2 VPP): enables wideband baseband signal amplification without gain-dependent bandwidth collapse. |
| Small-Signal Bandwidth | 260 MHz (−3 dB, AV = +2, VOUT = 0.5 VPP): supports high-fidelity amplification of fast video or data signals with minimal group delay distortion. |
| Slew Rate | 600 V/μs (typical, 4 V step): ensures faithful reproduction of large transient edges without slewing-induced distortion in video line drivers. |
| Differential Gain / Phase | 0.03% / 0.11° (NTSC, RL = 150 Ω, 4.43 MHz): meets broadcast-grade analog video fidelity requirements for portable DVD and camera interfaces. |
| Supply Current | 1.2 mA (per amplifier, RL = ∞, ±5 V): enables battery-powered designs with extended runtime while maintaining >200 MHz bandwidth. |
| Output Current | ±110 mA (linear sourcing/sinking, VOUT = 0): drives heavy capacitive or resistive loads (e.g., 75 Ω coaxial cables) without clipping or thermal shutdown. |
| Input Voltage Range | ±4.0 V (CMVR, CMRR > 50 dB): allows rail-to-rail input signal handling in ±5 V systems without common-mode compression. |
Pinout & Package
LMH6723MFX/NOPB is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, with 230°C/W junction-to-ambient thermal resistance. The device has no internal ground reference and operates in single- or dual-supply configurations.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTPUT | Amplifier output node; requires external feedback network (e.g., 1200 Ω to inverting input) for stable closed-loop operation. |
| 2 | V− | Negative supply terminal; accepts −2.5 V to −6 V in split-supply mode or ground in single-supply mode (4.5–12 V on V+). |
| 3 | +IN | Non-inverting input; high-impedance (100 kΩ), low-capacitance (1.5 pF) node suitable for high-frequency source coupling. |
| 4 | −IN | Inverting input; low-impedance (~500 Ω) current-summing node-feedback resistor must be placed directly here for stability. |
| 5 | V+ | Positive supply terminal; accepts +2.5 V to +6 V in split-supply mode or +4.5 V to +12 V in single-supply mode. |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback architecture | Enables gain-independent bandwidth control via feedback resistor selection-critical for stable high-frequency video amplifiers. |
| 0.1 dB gain flatness to 100 MHz | Preserves amplitude integrity across HD video baseband spectrum (0–30 MHz) with negligible ripple-induced color error. |
| Unity-gain stable | Operates reliably at AV = 1 without external compensation-simplifies design of buffer stages and cable drivers. |
| Single-supply operation (4.5–12 V) | Eliminates need for negative rail in portable systems like handheld displays and USB-powered test equipment. |
| Low input bias current mismatch | ±0.4 µA max (inverting) and ±2 µA max (non-inverting) minimizes offset drift in DC-coupled video paths and precision instrumentation. |
Applications
| Video Line Driver | A/D Converter Driver |
|---|---|
Use Scenario: Driving 75 Ω coaxial cable from an analog video source (e.g., CVBS output of portable media player) to a video decoder IC. IC Role / Device Role / Timing Role: High-speed current-feedback buffer with precise differential gain/phase matching and low output impedance. Use Value: Maintains 0.03% differential gain and 0.11° phase error over full NTSC bandwidth, preventing hue/saturation distortion in displayed video. |
Use Scenario: Conditioning analog sensor output prior to sampling by a 10-bit, 50 MSPS ADC in a portable oscilloscope front-end. IC Role / Device Role / Timing Role: Wideband, low-noise driver with 370 MHz bandwidth and 4.3 nV/√Hz input voltage noise. Use Value: Preserves signal integrity up to Nyquist frequency (25 MHz) with <−63 dBc harmonic distortion, minimizing quantization error. |
| Portable DVD Player Output | High-Speed Signal Buffer |
Use Scenario: Amplifying composite video (CVBS) or Y/C signals before transmission to an LCD panel or HDMI encoder in a battery-powered DVD player. IC Role / Device Role / Timing Role: Low-power, high-fidelity video amplifier operating from single 5 V supply with rail-compatible output swing. Use Value: Delivers 110 mA linear output current to drive capacitive panel traces and maintain 0.1 dB gain flatness to 100 MHz. |
Use Scenario: Isolating and amplifying clock or data signals between FPGA I/O banks and high-speed interconnects (e.g., LVDS receivers). IC Role / Device Role / Timing Role: Fast-settling (30 ns to 0.05%), low-jitter buffer with 600 V/μs slew rate and 2.5 ns rise/fall time. Use Value: Minimizes timing skew and edge degradation in multi-Gbps serial links, supporting clean signal transmission across PCB traces. |
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 |
|---|---|---|---|
| LMH6720MF/NOPB | Lower 220 MHz unity-gain bandwidth; 400 V/μs slew rate; 1.3 mA supply current; same SOT-23-5 package. | Reduced video fidelity (0.05% DG, 0.15° DP); less suitable for NTSC/PAL line driving but adequate for SD video or lower-bandwidth instrumentation. | Select when bandwidth >300 MHz is not required and power budget allows marginally higher ICC. |
| THS3201DGN | Higher 1.8 GHz bandwidth; 4700 V/μs slew rate; 15 mA supply current; 8-pin MSOP package; voltage-feedback architecture. | Requires different compensation strategy; unsuitable for direct replacement due to higher quiescent power and incompatible feedback topology. | Choose only for ultra-wideband (>500 MHz) applications where LMH6723MFX/NOPB's 370 MHz limit is insufficient. |
Compared with LMH6723MFX/NOPB, LMH6720MF/NOPB trades bandwidth and video linearity for slightly lower speed and higher power efficiency, while THS3201DGN offers extreme bandwidth at 12× higher supply current and incompatible voltage-feedback design-making LMH6723MFX/NOPB optimal for portable, battery-sensitive, broadcast-compliant video signal chains.
Availability
LMH6723MFX/NOPB is available at Aetrix Electronics and suitable for portable video line drivers, A/D converter front-ends, and high-speed signal buffering requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for LMH6723MFX/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 connectivity technologies, with decades of expertise in high-speed amplifier design and manufacturing.
The LMH6723MFX/NOPB belongs to TI's LMH high-speed current-feedback op amp family, engineered specifically for portable, low-power video and instrumentation applications demanding wide bandwidth, low distortion, and flexible supply operation.
FAQ
What is the recommended feedback resistor value for LMH6723MFX/NOPB at a gain of +2 V/V?
The LMH6723MFX/NOPB datasheet specifies 1200 Ω as the recommended feedback resistor for AV = +2 V/V with ±5 V supplies. This value balances bandwidth, gain flatness, and stability-deviating significantly (e.g., below 800 Ω or above 2000 Ω) causes peaking or roll-off. LMH6723MFX/NOPB requires this external RF because its inverting input impedance is ~500 Ω, unlike voltage-feedback op amps that rely on internal compensation.
Can LMH6723MFX/NOPB operate from a single 5-V supply?
Yes, LMH6723MFX/NOPB supports single-supply operation from 4.5 V to 12 V. With V− tied to ground and V+ at 5 V, it delivers ±1.45 V common-mode input range and ±1.65 V output swing into high-Z loads. Its lack of internal ground reference enables true rail-to-rail input and output capability in this configuration-ideal for portable DVD players and USB-powered test gear.
What is the maximum capacitive load LMH6723MFX/NOPB can drive without instability?
LMH6723MFX/NOPB can safely drive up to 100 pF with a 48 Ω series output resistor (ROUT) at ±5 V supply, per TI's "Suggested ROUT vs. CL" curves. Without ROUT, capacitive loading >10 pF risks oscillation due to phase shift at the inverting input. For 75 Ω coaxial cable (≈60 pF/m), a 33–47 Ω ROUT is typically used to maintain ≤0.5 dB peaking and preserve 100 MHz gain flatness.
How does LMH6723MFX/NOPB differ from voltage-feedback op amps in layout requirements?
LMH6723MFX/NOPB demands strict minimization of inverting input parasitic capacitance-trace length to −IN must be <1 mm and free of vias or stubs-because its stability depends on feedback resistor impedance dominating stray capacitance. Voltage-feedback op amps tolerate more layout flexibility. Also, LMH6723MFX/NOPB requires local 100 nF + 6.8 pF bypassing at both supply pins, placed within 2 mm of the package, to suppress high-frequency supply noise coupling.
Is LMH6723MFX/NOPB pin-compatible with other devices in the LMH672x family?
No-LMH6723MFX/NOPB (SOT-23-5) is not pin-compatible with LMH6723MA/NOPB (SOIC-8) or LMH6724MA/NOPB (SOIC-8 dual). The SOT-23-5 variant has dedicated OUTPUT, V−, +IN, −IN, and V+ pins; SOIC-8 versions repurpose pins for dual-channel operation or NC functions. Board redesign is required when substituting packages, though electrical specifications and application circuits remain functionally aligned across the family.
LMH6723MFX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 1
- 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
- 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:
- SOT-23-5
LMH6723MFX/NOPB FAQ
1.How can I place an order for LMH6723MFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6723MFX/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 LMH6723MFX/NOPB reliable?
The price and inventory of LMH6723MFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6723MFX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6723MFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6723MFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6723MFX/NOPB?
LMH6723MFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6723MFX/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 LMH6723MFX/NOPB?
For technical support, including LMH6723MFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6723MFX/NOPB requirements.
6.How does Aetrix verify that LMH6723MFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6723MFX/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 LMH6723MFX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6723MFX/NOPB?
All LMH6723MFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6723MFX/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 LMH6723MFX/NOPB part is unused and in its original packaging.
Return procedure for LMH6723MFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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