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Texas Instruments LMH6704MFX/NOPB
- Part No.:
- LMH6704MFX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
LMH6704MFX/NOPB.pdf
- Description:
- IC BUFFER 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,408
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Product details
Overview
LMH6704MFX/NOPB from Texas Instruments is a 650 MHz current-feedback selectable-gain buffer in 6-pin SOT-23 package, configured for AV = +1, +2, or −1 V/V via pin-strapping. It delivers ±90 mA output current, 3000 V/µs slew rate, and 0.02%/0.02° differential gain/phase at 4.43 MHz - optimized for HDTV, RGB, and ADC/DAC video signal conditioning.
For engineers reviewing the LMH6704MFX/NOPB datasheet, LMH6704MFX/NOPB pinout, LMH6704MFX/NOPB application, or LMH6704MFX/NOPB equivalent, this page provides verified pin assignments, gain configuration logic, video-system distortion metrics, disable timing (10 ns TOFF), and real-world layout guidance for capacitive-load stability.
Technical Context
The LMH6704MFX/NOPB uses a current-feedback architecture with integrated 465 Ω RF/RG resistors, enabling stable gain selection without external feedback networks. Its internal bias circuitry supports split-supply (±4 V to ±6 V) or single-supply operation, with no internal ground reference.
Disable functionality is TTL-compatible (VIH ≥ 2.0 V, VIL ≤ 0.8 V), placing output in high-Z state with 0.25 µA leakage and 250 µA quiescent current. The 6-pin SOT-23 package places IN+, IN−, OUT, VS+, VS−, and DIS on dedicated terminals - no NC pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth | 650 MHz at AV = +1, 0.5 VPP - enables full HD baseband video passband without attenuation |
| Slew Rate | 3000 V/µs - supports fast transient response for composite sync pulses and digital video edges |
| Differential Gain/Phase | 0.02%/0.02° at 4.43 MHz - meets broadcast-grade NTSC/PAL fidelity requirements |
| Output Current | ±90 mA - drives dual 75 Ω video loads simultaneously with minimal droop |
| Disable Time | 10 ns - enables sub-100 ns analog switching for high-speed multiplexing |
| Input Voltage Noise | 9.3 nV/√Hz at AV = +1 - preserves SNR in low-level RGB or DAC buffer stages |
| Supply Current (Enabled) | 11.5 mA - balances performance and power in portable or multi-channel video systems |
Pinout & Package
LMH6704MFX/NOPB is housed in a 6-pin SOT-23 (DBV) package with 0.95 mm pitch, 1.6 mm × 2.9 mm footprint, and 1.1 mm max height. Thermal resistance is θJA = 187°C/W. Pin 1 is marked by a dot; orientation follows JEDEC standard Q3 quadrant feed direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIS) | Disable control input | TTL-compatible enable/disable; float or pull high (>2.0 V) for active mode; ≤0.8 V for high-Z output |
| 2 (VS−) | Negative supply rail | Connects to −4 V to −6 V; forms return path for bias current and output sink capability |
| 3 (+IN) | Non-inverting input | Used for AV = +1 or +2 configurations; tied to signal source or ground per Table 1 gain selection |
| 4 (−IN) | Inverting input | Used for AV = −1 or +2 configurations; grounded or connected to signal based on selected gain |
| 5 (VS+) | Positive supply rail | Connects to +4 V to +6 V; supplies current for output sourcing and internal biasing |
| 6 (OUT) | Amplifier output | Delivers ±90 mA into 100 Ω; requires series RISO (e.g., 22 Ω) for >5 pF capacitive loads |
Key Features
| Feature | Design Value |
|---|---|
| On-chip gain-setting resistors | Matched 465 Ω RF/RG enable ±1% gain accuracy over temperature without external components |
| DC-coupled wideband operation | Full 650 MHz bandwidth at AV = +1 supports baseband video, clock distribution, and IF signals |
| Low-distortion video optimization | −62 dBc 2nd/−78 dBc 3rd harmonic at 10 MHz ensures clean chroma/luma separation |
| High-Z disable mode | Output leakage <0.2 µA and 10 ns disable time support analog multiplexer construction |
| Capacitive-load stabilization | Recommended RISO values (e.g., 22 Ω for 47 pF) prevent peaking and oscillation in cable-drive applications |
Applications
| HDTV Signal Distribution | ADC Front-End Driver |
|---|---|
|
Use Scenario: Driving dual 75 Ω coaxial outputs from a single HDMI or component video source. IC Role / Device Role / Timing Role: Selectable-gain buffer with AV = +2 to compensate for 6 dB loss across back-terminated 75 Ω lines. Use Value: 0.02% DG/0.02° DP preserves color fidelity; 650 MHz bandwidth passes 1080p/60 chroma without roll-off. |
Use Scenario: Conditioning analog sensor output prior to sampling by a 12-bit, 100 MSPS ADC. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate driver ensuring full-scale step response within 10 ns settling time. Use Value: 9.3 nV/√Hz input noise and 3000 V/µs slew rate maintain ENOB >11.2 bits at Nyquist. |
| RGB Graphics Interface | High-Speed Analog Multiplexer |
|
Use Scenario: Buffering red, green, and blue signals from GPU to display panel with independent gain control. IC Role / Device Role / Timing Role: Three LMH6704MFX/NOPB units in AV = +1 configuration, each driving one RGB channel. Use Value: Matched gain and phase response across channels prevents color skew; ±90 mA output handles panel capacitance. |
Use Scenario: Constructing an 8:1 analog switch matrix for test equipment signal routing. IC Role / Device Role / Timing Role: Eight LMH6704MFX/NOPB units with synchronized DIS control enabling nanosecond-scale channel switching. Use Value: 10 ns disable time and <0.2 µA leakage ensure minimal crosstalk and signal corruption during transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar selectable-gain buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6702MF/NOPB | Lower bandwidth (550 MHz at AV = +1), no disable pin, same SOT-23-6 package | Lacks TTL-compatible disable; unsuitable for multiplexing or power-gated systems | Select when disable function is unnecessary and cost sensitivity outweighs 100 MHz bandwidth margin |
| THS3201DGN | Higher slew rate (4700 V/µs), wider bandwidth (1.8 GHz), but fixed AV = +1 only, 8-pin MSOP | Requires external gain-setting network; no built-in −1 or +2 options; larger footprint | Choose for ultra-high-speed unity-gain applications where programmable gain is not required |
Compared with LMH6704MFX/NOPB, LMH6702MF/NOPB trades disable capability and bandwidth for lower cost, while THS3201DGN offers higher speed at the expense of gain flexibility and package size - making LMH6704MFX/NOPB optimal for space-constrained, multi-gain video routing.
Availability
LMH6704MFX/NOPB is available at Aetrix Electronics and suitable for HDTV signal distribution, ADC front-end buffering, RGB graphics interfaces, and high-speed analog multiplexing requiring stable component supply across industrial and broadcast production cycles.
Supply support for LMH6704MFX/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 over 50 years of amplifier design heritage.
The LMH6704 product line targets high-fidelity video infrastructure and wideband data acquisition, delivering DC-coupled, low-distortion amplification with integrated gain selection to reduce layout complexity and improve system repeatability.
FAQ
What gain configurations does the LMH6704MFX/NOPB support, and how are they set?
The LMH6704MFX/NOPB supports AV = +1, +2, and −1 V/V using internal 465 Ω resistors. Gain is set by strapping pins 3 (+IN) and 4 (−IN): for +2, connect +IN to signal and ground −IN; for +1, connect +IN to signal and leave −IN open; for −1, ground +IN and connect −IN to signal. This eliminates external resistor matching errors and ensures ±1% gain accuracy over temperature.
How does the disable function operate on the LMH6704MFX/NOPB, and what is its timing behavior?
The LMH6704MFX/NOPB disable pin (Pin 1) accepts TTL logic levels: ≥2.0 V or floating enables operation; ≤0.8 V disables the amplifier, placing output in high-Z state with 0.2 µA leakage. Enable/disable times are both 10 ns, and output glitch is limited to 50 mVPP. During disable, supply current drops to 250 µA, with unbalanced ICC (350 µA) and IEE (250 µA) due to internal pull-up.
Can the LMH6704MFX/NOPB drive 75 Ω video loads, and what layout practices minimize distortion?
Yes - the LMH6704MFX/NOPB delivers ±90 mA and achieves 0.02%/0.02° differential gain/phase into 150 Ω (equivalent to two 75 Ω loads in parallel). For lowest distortion, use back-termination: place a 75 Ω resistor at the load end of the coaxial cable, not at the amplifier output. Also include 0.01 µF and 0.1 µF ceramic bypass capacitors near VS+/VS− pins, and remove ground plane under input/output traces to reduce parasitic capacitance.
What is the recommended approach for stabilizing the LMH6704MFX/NOPB when driving capacitive loads?
Use a series output isolation resistor (RISO) between LMH6704MFX/NOPB OUT (Pin 6) and the capacitive load. TI specifies RISO = 22 Ω for 47 pF, 39 Ω for 15 pF, and 56 Ω for 4.7 pF - values selected to limit frequency-response peaking to ≤0.5 dB. Avoid direct connection to >5 pF loads; omit RISO only for purely resistive terminations like 75 Ω cables with proper back-termination.
Is the LMH6704MFX/NOPB suitable for single-supply operation, and what are the input voltage limits?
Yes - the LMH6704MFX/NOPB has no internal ground reference and operates from single supplies (e.g., 0 V and +10 V) or split supplies (±4 V to ±6 V). Common-mode input range is VS− to VS+, allowing rail-to-rail input with appropriate level-shifting. Output swing is ±3.12 V into 100 Ω with ±5 V supplies, and input offset voltage is ±7 mV maximum - suitable for DC-coupled video and instrumentation paths.
LMH6704MFX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Buffer
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 3000V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 650 MHz
- Current - Input Bias:
- 5 µA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 11.5mA
- Current - Output / Channel:
- 90 mA
- Voltage - Supply Span (Min):
- 8 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
LMH6704MFX/NOPB FAQ
1.How can I place an order for LMH6704MFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6704MFX/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 LMH6704MFX/NOPB reliable?
The price and inventory of LMH6704MFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6704MFX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6704MFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6704MFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6704MFX/NOPB?
LMH6704MFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6704MFX/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 LMH6704MFX/NOPB?
For technical support, including LMH6704MFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6704MFX/NOPB requirements.
6.How does Aetrix verify that LMH6704MFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6704MFX/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 LMH6704MFX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6704MFX/NOPB?
All LMH6704MFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6704MFX/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 LMH6704MFX/NOPB part is unused and in its original packaging.
Return procedure for LMH6704MFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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