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Texas Instruments LMH6702MF/NOPB
- Part No.:
- LMH6702MF/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMH6702MF/NOPB.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,784
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Product details
Overview
LMH6702MF/NOPB from Texas Instruments is a 1.7-GHz current-feedback operational amplifier optimized for ultra-low distortion signal conditioning in high-speed data acquisition systems. It delivers −100 dBc 2nd harmonic distortion at 5 MHz (SOT-23), 3100 V/µs slew rate, 13.4 ns settling to 0.1%, and 1.83 nV/√Hz input voltage noise - enabling precision flash ADC driving in radar receivers and high-resolution video interfaces.
For engineers reviewing the LMH6702MF/NOPB datasheet, LMH6702MF/NOPB pinout, LMH6702MF/NOPB application, or LMH6702MF/NOPB equivalent, key selection criteria include harmonic distortion vs. load impedance, SOT-23 package–dependent HD2/HD3 performance, gain flatness up to 120 MHz, and current-feedback stability without external compensation.
Technical Context
The LMH6702MF/NOPB employs a VIP10™ complementary bipolar current-feedback architecture that decouples bandwidth from closed-loop gain - sustaining 720 MHz at AV = 2 V/V and 1.7 GHz at AV = 1 with 0.5 VPP output. Its loop gain is set primarily by the 237 Ω feedback resistor, not internal compensation networks.
Distortion performance is highly sensitive to PCB layout: supply decoupling ground return separation and SOT-23's shorter bond wires reduce coupling-induced HD2 by up to 13 dB versus SOIC at 20 MHz. Input bias currents are uncorrelated (−15 µA non-inverting, ±30 µA inverting), precluding standard impedance-matching offset cancellation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3-dB Bandwidth | 1.7 GHz at AV = 1, VOUT = 0.5 VPP - supports full-power operation into wideband IF stages up to L-band. |
| 2nd Harmonic Distortion | −100 dBc at 5 MHz, RL = 100 Ω (SOT-23) - enables >10-bit SFDR in 5–20 MHz signal chains without post-correction. |
| Slew Rate | 3100 V/µs - sustains clean 6-VPP transient response with <0.1% overshoot for fast ADC sampling clocks. |
| Settling Time | 13.4 ns to 0.1% for 2-V step - meets timing budgets for ≥75 MSPS flash ADC front ends. |
| Input Voltage Noise | 1.83 nV/√Hz above 1 MHz - dominates total noise floor in transimpedance configurations with Rf < 1 kΩ. |
| Supply Current | 12.5 mA at ±5 V - balances speed/power for portable instrumentation and battery-backed signal capture. |
| Output Current | 80 mA - drives 100 Ω loads directly, eliminating need for external buffer stages in line-driver applications. |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads. Thermal resistance RθJA = 182 °C/W enables operation up to +85°C ambient with minimal heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Low-impedance (30 mΩ) drive node; requires series resistor (RS) when driving capacitive ADC inputs to suppress ringing. |
| 2 (V−) | Negative supply | Accepts −6.75 V absolute max; decoupling capacitor (CNEG) must use separate ground return to minimize HD2 coupling. |
| 3 (+IN) | Non-inverting input | 1.4 MΩ input resistance, 1.6 pF capacitance; bias current −15 µA (max) flows *out* - impacts DC offset in high-Z sensor interfaces. |
| 4 (V+) | Positive supply | Accepts +6.75 V absolute max; decoupling capacitor (CPOS) requires isolated ground path to prevent supply-induced distortion. |
| 5 (−IN) | Inverting input | High-impedance summing node; bias current ±30 µA (max) introduces offset errors unless compensated via feedback network design. |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback architecture | Enables stable unity-gain operation without external compensation while maintaining 1.7 GHz bandwidth - eliminates trade-off between speed and stability in voltage-feedback op amps. |
| SOT-23–optimized distortion | −100 dBc HD2 at 5 MHz (vs. −87 dBc in SOIC) due to shorter internal bond wires - critical for RF/IF receiver dynamic range where 2nd-order products fall in-band. |
| Full-power bandwidth enhancement | Internal circuitry boosts bandwidth under large-signal conditions without increasing quiescent current - achieves 720 MHz at 2 VPP while drawing only 12.5 mA. |
| Low intermodulation distortion | −67 dBc OIM3 at 75 MHz, 10 dBm/tone - preserves adjacent-channel rejection in wideband communication receivers and spectrum analyzers. |
| Differential gain/phase | 0.024% DG / 0.004° DP at 3.58 MHz - meets NTSC broadcast video fidelity requirements without post-processing correction. |
Applications
| Flash A-D Driver | Wide Dynamic Range IF Amp |
|---|---|
Use Scenario: Driving the analog input of a 10-bit, 100-MSPS flash ADC in a software-defined radio front end. IC Role / Device Role / Timing Role: Wideband buffer providing low-noise, low-distortion signal conditioning with sub-ns edge fidelity to preserve aperture uncertainty. Use Value: −100 dBc HD2 at 5 MHz ensures converter ENOB remains ≥9.5 bits; 13.4 ns settling guarantees accurate sampling within 10-ns timing window. |
Use Scenario: Amplifying 40–200 MHz IF signals in radar pulse compression receivers requiring >80 dB spurious-free dynamic range. IC Role / Device Role / Timing Role: High-linearity gain stage placed after mixer to boost weak echoes while suppressing 2nd/3rd harmonics that mask low-RCS targets. Use Value: −67 dBc OIM3 at 75 MHz prevents intermodulation artifacts from masking adjacent Doppler bins; 1.83 nV/√Hz noise floor maintains SNR > 72 dB. |
| Radar and Communication Receivers | High Resolution Video |
Use Scenario: Baseband I/Q channel amplifier in a 5G massive MIMO transceiver operating at 3.5 GHz carrier with 100 MHz instantaneous bandwidth. IC Role / Device Role / Timing Role: DC-coupled, low-phase-error amplifier preserving quadrature integrity across full IF band for digital beamforming. Use Value: 0.09° linear phase deviation (DC–100 MHz) minimizes group delay variation; 120 MHz 0.1-dB gain flatness ensures uniform channel response. |
Use Scenario: RGB line driver in 4K/60 Hz HDMI source equipment transmitting uncompressed video over 15-m cables. IC Role / Device Role / Timing Role: High-current output buffer compensating for cable loss while maintaining differential gain/phase accuracy for color fidelity. Use Value: 0.024% DG / 0.004° DP at 3.58 MHz meets SMPTE RP149 spec; 80 mA output current drives 75-Ω loads with <0.1 dB loss at 100 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wideband op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6703MF/NOPB | Higher supply current (15 mA), improved HD2 (−105 dBc @ 5 MHz), same SOT-23-5 footprint. | Better suited for ultra-low-distortion test equipment where 5 dB HD2 margin justifies +2.5 mA power penalty. | Select LMH6703MF/NOPB when HD2 < −100 dBc is mandatory and thermal headroom allows higher ICC. |
| THS3201DGN | SO-8 package only; lower bandwidth (1.8 GHz small-signal but 1.1 GHz full-power); higher HD2 (−85 dBc @ 5 MHz). | Preferred for space-constrained designs needing dual-channel capability (THS3202) or compatibility with legacy SOIC layouts. | Choose THS3201DGN only if board real estate permits SO-8 and −85 dBc HD2 satisfies system SFDR budget. |
Compared with LMH6702MF/NOPB, LMH6703MF/NOPB trades 2.5 mA extra supply current for 5 dB lower HD2 - ideal for metrology-grade signal sources; THS3201DGN offers dual-channel flexibility in SO-8 but sacrifices 15 dB HD2 performance and SOT-23 compactness.
Availability
LMH6702MF/NOPB is available at Aetrix Electronics and suitable for flash ADC driving, wideband IF amplification, radar receiver signal chains, and high-resolution video line driving requiring stable component supply across industrial, defense, and broadcast production cycles.
Supply support for LMH6702MF/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 and embedded processing technologies, with decades of expertise in high-speed amplifier design and manufacturing.
The LMH6702MF/NOPB belongs to TI's LMH ultra-wideband op amp product line, engineered specifically for demanding signal integrity applications including RF receiver front ends, high-speed data converters, and broadcast video infrastructure.
FAQ
What is the maximum recommended supply voltage for LMH6702MF/NOPB?
The LMH6702MF/NOPB has an absolute maximum supply voltage rating of ±6.75 V per the datasheet. Operation at ±6 V is permitted within recommended conditions, but sustained use above ±5 V increases power dissipation and may reduce long-term reliability without adequate thermal management. The device draws 12.5 mA at ±5 V, so thermal design must account for 125 mW minimum dissipation in SOT-23 packaging.
Why does LMH6702MF/NOPB show different harmonic distortion values for SOT-23 versus SOIC packages?
LMH6702MF/NOPB exhibits −100 dBc HD2 at 5 MHz in SOT-23 versus −87 dBc in SOIC due to shorter internal bond wires reducing supply-to-input coupling. This parasitic coupling induces 2nd-harmonic distortion, especially under high-frequency transients. The SOT-23's smaller form factor inherently minimizes this effect, making LMH6702MF/NOPB the preferred variant for ultra-low-distortion applications below 50 MHz.
Can LMH6702MF/NOPB drive a 50-Ω load directly?
Yes, LMH6702MF/NOPB can drive a 50-Ω load directly with 80 mA output current capability, though output voltage swing is reduced to ±3.3 V (typical) under 100-Ω load and further compressed at 50 Ω. For optimal linearity and thermal safety, a series resistor (e.g., 25 Ω) is recommended to limit peak current and maintain HD2 < −95 dBc at 10 MHz when driving 50-Ω transmission lines.
What feedback resistor value is optimal for LMH6702MF/NOPB in non-inverting configuration?
The LMH6702MF/NOPB is optimized for a 237-Ω feedback resistor in both inverting and non-inverting configurations. Using 237 Ω ensures stable pulse response with minimal ringing and achieves the specified 720 MHz bandwidth at AV = 2. Deviations below 200 Ω increase peaking; values above 270 Ω reduce bandwidth and degrade settling time - both confirmed in Figure 24 and Section 8.2.1 of the LMH6702MF/NOPB datasheet.
How does LMH6702MF/NOPB handle capacitive loads such as ADC inputs?
LMH6702MF/NOPB requires a series resistor (RS) between its output and capacitive loads like ADC inputs to prevent instability. For typical 5–15 pF input capacitance, RS = 10–25 Ω minimizes settling time per Figure 11. Without RS, parasitic capacitance causes severe ringing (>20% overshoot) and extends settling beyond 50 ns. This behavior is inherent to current-feedback topology and must be addressed in layout - not compensated via feedback network changes.
LMH6702MF/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:
- 3100V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.7 GHz
- Current - Input Bias:
- 6 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 12.5mA
- Current - Output / Channel:
- 80 mA
- Voltage - Supply Span (Min):
- 10 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
LMH6702MF/NOPB FAQ
1.How can I place an order for LMH6702MF/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6702MF/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 LMH6702MF/NOPB reliable?
The price and inventory of LMH6702MF/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6702MF/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6702MF/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6702MF/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6702MF/NOPB?
LMH6702MF/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6702MF/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 LMH6702MF/NOPB?
For technical support, including LMH6702MF/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6702MF/NOPB requirements.
6.How does Aetrix verify that LMH6702MF/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6702MF/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 LMH6702MF/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6702MF/NOPB?
All LMH6702MF/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6702MF/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 LMH6702MF/NOPB part is unused and in its original packaging.
Return procedure for LMH6702MF/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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