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Texas Instruments LMH6702MAX/NOPB
- Part No.:
- LMH6702MAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6702MAX/NOPB.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,824
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Product details
Overview
LMH6702MAX/NOPB from Texas Instruments is a 1.7-GHz current-feedback operational amplifier optimized for ultra-low harmonic distortion (−100 dBc HD2, −96 dBc HD3 at 5 MHz, SOT-23), 3100 V/µs slew rate, and 1.83 nV/√Hz input voltage noise - deployed as a high-fidelity analog front-end driver for flash ADCs in radar receivers and high-resolution video systems.
For engineers reviewing the LMH6702MAX/NOPB datasheet, LMH6702MAX/NOPB pinout, LMH6702MAX/NOPB application, or LMH6702MAX/NOPB equivalent, key selection criteria include its 720-MHz full-power bandwidth at 2-VPP, −67 dBc intermodulation distortion at 75 MHz, and package-dependent distortion performance (SOT-23 vs SOIC).
Technical Context
The LMH6702MAX/NOPB uses current-feedback architecture with unity-gain stability and bandwidth largely set by feedback resistor value (optimized at 237 Ω). Its VIP10™ complementary bipolar process enables simultaneous high speed and low distortion without external compensation.
Distortion performance is highly sensitive to layout: supply decoupling ground return separation, bonding wire length (SOT-23 improves HD2/HD3 over SOIC), and CSS capacitor placement across supplies directly impact measured −100 dBc HD2 at 5 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3-dB Bandwidth | 1.7 GHz at 0.5 VPP output - supports wideband IF and RF signal conditioning up to L-band |
| Slew Rate | 3100 V/µs - enables clean 2-V step response in 13.4 ns with 0.1% settling, critical for ADC sampling fidelity |
| 2nd Harmonic Distortion | −100 dBc at 5 MHz, RL = 100 Ω (SOT-23) - preserves SFDR in high-dynamic-range data acquisition |
| Input Voltage Noise | 1.83 nV/√Hz >1 MHz - minimizes added noise floor when driving precision ADC inputs |
| Supply Current | 12.5 mA typical at ±5 V - balances power efficiency with ultra-wideband performance |
| Output Current | 80 mA - drives 100-Ω loads directly, supporting low-impedance transmission lines and ADC input termination |
| Intermodulation Distortion | −67 dBc at 75 MHz, two-tone - maintains signal purity in communication receiver IF stages |
Pinout & Package
LMH6702MAX/NOPB is packaged in an 8-pin SOIC (D package), 4.90 mm × 3.91 mm body size, with pins 1, 5, and 8 internally unconnected (NC). The device uses standard op amp pinout: Pin 2 = inverting input (−IN), Pin 3 = non-inverting input (+IN), Pin 4 = negative supply (V−), Pin 6 = output (OUT), Pin 7 = positive supply (V+).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8 | No connection (NC) | Internally unconnected - must be left floating or tied to ground per layout best practice; no electrical function |
| 2 | Inverting input (−IN) | Current-summing node in CFB topology; sets closed-loop gain with feedback resistor (237 Ω recommended) |
| 3 | Non-inverting input (+IN) | High-impedance input (1.4 MΩ, 1.6 pF); used for non-inverting configurations and biasing reference points |
| 4 | Negative supply (V−) | Accepts −4 V to −6 V; requires low-ESR decoupling (6.8 µF + 0.01 µF) referenced to dedicated ground plane |
| 6 | Output (OUT) | Capable of ±3.5 V swing into 100 Ω; drives ADC inputs directly but requires series resistor (RS) for capacitive load stabilization |
| 7 | Positive supply (V+) | Accepts +4 V to +6 V; decoupling identical to V−; CSS capacitor across supplies reduces HD2 coupling via bond wires |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback architecture | Enables 1.7-GHz small-signal bandwidth with minimal gain dependency - unlike voltage-feedback op amps, bandwidth remains stable from AV = −1 to +10 |
| Ultra-low distortion packaging | SOT-23 variant achieves −100 dBc HD2 at 5 MHz due to shorter internal bond wires; SOIC variant shows −87 dBc under identical conditions |
| Optimized feedback network | 237-Ω feedback resistor delivers optimal pulse response and distortion; lower values cause ringing, higher values reduce bandwidth |
| Capacitive load drive support | Stable into ADC input capacitance when series resistor (RS) is used; RS value selected from CL vs settling time curves (e.g., ~25 Ω for 5 pF) |
| Low-noise, high-speed DC coupling | 1.83 nV/√Hz input noise + DC-coupled path enables baseband-to-RF signal chain integrity without AC coupling artifacts |
Applications
| Flash A-D Driver | Wide Dynamic Range IF Amp |
|---|---|
Use Scenario: Driving the input of a 10-bit, 100-MSPS flash ADC in a software-defined radio front end. IC Role / Device Role / Timing Role: High-speed buffer and gain stage providing low-noise, low-distortion signal conditioning immediately prior to sampling. Use Value: −67 dBc IMD at 75 MHz ensures >9.5 effective bits across Nyquist band; 13.4 ns 0.1% settling guarantees accurate sample capture timing. |
Use Scenario: Amplifying intermediate frequency signals (40–120 MHz) in radar receiver chains before downconversion. IC Role / Device Role / Timing Role: Wideband IF gain block maintaining amplitude and phase linearity across multi-octave bandwidth. Use Value: 0.09° linear phase deviation (DC–100 MHz) and <0.024% differential gain preserve pulse fidelity and modulation accuracy. |
| Radar and Communication Receivers | High Resolution Video |
Use Scenario: Low-noise amplification of weak pulsed RF returns in X-band pulse-Doppler radar systems. IC Role / Device Role / Timing Role: First-stage analog signal conditioner after LNA, delivering high SFDR before digitization. Use Value: −100 dBc HD2 at 5 MHz and 1.83 nV/√Hz noise floor maximize dynamic range for detecting low-RCS targets amid clutter. |
Use Scenario: Buffering RGB or YPbPr video signals in 1080p/60 broadcast equipment requiring DC-coupled, low-delay paths. IC Role / Device Role / Timing Role: Line driver and reconstruction filter bypass amplifier preserving edge sharpness and color fidelity. Use Value: 1.7-GHz bandwidth supports >300 MHz pixel clock harmonics; <0.007° differential phase prevents hue shift in PAL/NTSC systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wideband current-feedback op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6703MA/NOPB | Higher supply current (15 mA), improved HD2 (−105 dBc @5 MHz), same SOIC-8 package | Better distortion at cost of 20% higher power; suited for metrology-grade ADC drivers where power is secondary | Select LMH6703MA/NOPB only if −105 dBc HD2 is required and thermal headroom allows +3 mA per channel |
| THS3201DGN | Lower bandwidth (1.8 GHz small-signal but only 400 MHz full-power), higher noise (2.1 nV/√Hz), different pinout (MSOP-8) | Less suitable for 2-VPP IF amplification above 400 MHz; requires PCB redesign due to non-pin-compatible layout | Consider THS3201DGN only for space-constrained designs accepting reduced full-power bandwidth and higher noise |
Compared with LMH6702MAX/NOPB, LMH6703MA/NOPB offers superior distortion at higher quiescent current, while THS3201DGN trades bandwidth headroom and noise performance for smaller footprint - neither is pin-compatible, and both require revalidation of feedback network and layout.
Availability
LMH6702MAX/NOPB is available at Aetrix Electronics and suitable for radar receivers, high-resolution video interfaces, and flash A-D converter front ends requiring stable component supply, long-term industrial lifecycle support, and traceable sourcing.
Supply support for LMH6702MAX/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 op amp design and manufacturing.
The LMH6702MAX/NOPB belongs to TI's ultra-wideband current-feedback op amp product line, engineered specifically for high-dynamic-range signal acquisition in radar, communications, and test equipment where distortion, noise, and settling time are critical.
FAQ
What is the recommended feedback resistor value for LMH6702MAX/NOPB?
The LMH6702MAX/NOPB is optimized for a 237-Ω feedback resistor in both inverting and non-inverting configurations. Using this value ensures optimal pulse response, minimal ringing, and best harmonic distortion performance. Lower values (e.g., <200 Ω) increase peaking and instability; higher values (e.g., >270 Ω) reduce bandwidth and degrade settling behavior. The LMH6702MAX/NOPB datasheet specifies 237 Ω as the reference design point across all key AC performance graphs.
Does LMH6702MAX/NOPB support single-supply operation?
No, LMH6702MAX/NOPB is specified only for dual-supply operation across ±4 V to ±6 V. It does not support true single-supply use (e.g., 0 V to +10 V) because its input common-mode range is limited to ±2.2 V and output swing is asymmetric near rail. Attempting single-supply biasing violates recommended operating conditions and degrades distortion, bandwidth, and DC accuracy. For single-supply applications, consider TI's THS3491 or OPA695 instead of LMH6702MAX/NOPB.
How does package type affect distortion performance of LMH6702MAX/NOPB?
Package type significantly impacts harmonic distortion: the SOT-23 variant achieves −100 dBc HD2 at 5 MHz, while the SOIC-8 variant (LMH6702MAX/NOPB) measures −87 dBc under identical conditions. This 13 dB difference arises from shorter internal bond wires in SOT-23, reducing supply-to-input coupling. Layout practices (e.g., split ground planes, CSS capacitor) further modulate this effect. Therefore, LMH6702MAX/NOPB's SOIC package delivers excellent but not maximum possible distortion performance.
Can LMH6702MAX/NOPB drive ADC inputs directly without external components?
No - LMH6702MAX/NOPB requires a series resistor (RS) between its output and the ADC input to suppress ringing caused by ADC input capacitance. Typical RS values range from 15 Ω to 35 Ω depending on load capacitance (e.g., 25 Ω for 5 pF). Direct connection risks overshoot, prolonged settling, and degraded SNR. The LMH6702MAX/NOPB datasheet Figure 11 provides RS vs CL curves, and Application Note SNOA365 confirms this requirement for all current-feedback op amps driving capacitive loads.
What is the maximum safe output current for LMH6702MAX/NOPB?
The LMH6702MAX/NOPB delivers up to 80 mA continuous output current into resistive loads, as confirmed in its Electrical Characteristics table. However, sustained 80 mA operation requires adherence to thermal limits: at ±5 V supply, junction temperature must remain ≤150°C. With RθJA = 133°C/W (SOIC), power dissipation >375 mW (e.g., ±3.5 V into 100 Ω = 122.5 mW per rail) is permissible only with adequate board copper and airflow. Exceeding 80 mA risks current limiting or thermal shutdown, so LMH6702MAX/NOPB should not be operated beyond this spec under any condition.
LMH6702MAX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 8-SOIC
LMH6702MAX/NOPB FAQ
1.How can I place an order for LMH6702MAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6702MAX/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 LMH6702MAX/NOPB reliable?
The price and inventory of LMH6702MAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6702MAX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6702MAX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6702MAX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6702MAX/NOPB?
LMH6702MAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6702MAX/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 LMH6702MAX/NOPB?
For technical support, including LMH6702MAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6702MAX/NOPB requirements.
6.How does Aetrix verify that LMH6702MAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6702MAX/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 LMH6702MAX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6702MAX/NOPB?
All LMH6702MAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6702MAX/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 LMH6702MAX/NOPB part is unused and in its original packaging.
Return procedure for LMH6702MAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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