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Texas Instruments LMH6702MA
- Part No.:
- LMH6702MA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6702MA.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,206
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Product details
Overview
LMH6702MA from Texas Instruments is a 1.7-GHz current-feedback operational amplifier optimized for ultra-low harmonic distortion in high-fidelity signal paths. It delivers −100 dBc HD2 and −96 dBc HD3 at 5 MHz (SOT-23), 3100 V/µs slew rate, 1.83 nV/√Hz input voltage noise, and 13.4 ns settling to 0.1% - enabling use as a flash ADC driver in radar receivers and high-resolution video systems.
For engineers reviewing the LMH6702MA datasheet, LMH6702MA pinout, LMH6702MA application, or LMH6702MA equivalent, key selection criteria include its current-feedback architecture, package-dependent distortion performance (SOT-23 vs SOIC), ±5 V supply operation, 100 Ω load drive capability, and absence of external compensation requirements.
Technical Context
The LMH6702MA employs a current-feedback topology where loop gain and bandwidth are set primarily by the feedback resistor value (optimized at 237 Ω), not closed-loop gain - enabling stable 1.7 GHz −3-dB bandwidth at AV = 2 with minimal gain dependency. Its VIP10™ complementary bipolar process supports high-speed operation while maintaining DC accuracy.
Harmonic distortion is highly sensitive to PCB layout: supply decoupling ground return separation and package choice (SOT-23 offers superior HD2/HD3 vs SOIC due to shorter bond wires) directly impact measured −100 dBc/−96 dBc performance at 5 MHz. Input bias currents are uncorrelated between inverting and non-inverting inputs, precluding standard impedance-matching offset cancellation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3-dB Bandwidth | 1.7 GHz at AV = 2, VOUT = 0.5 VPP - enables baseband-to-UHF signal amplification without gain-bandwidth trade-off |
| Slew Rate | 3100 V/µs - supports full-scale transient response for >10-bit resolution at multi-MSPS sampling rates |
| HD2 / HD3 (5 MHz) | −100 dBc / −96 dBc (SOT-23) - meets distortion floor requirements for 10+ ENOB flash ADC drivers |
| Input Voltage Noise | 1.83 nV/√Hz above 1 MHz - preserves SNR in wideband IF and video signal chains |
| Settling Time | 13.4 ns to 0.1% - ensures accurate sampling window closure for high-speed data acquisition |
| Supply Current | 12.5 mA at ±5 V - balances power efficiency with RF-grade linearity in portable or thermally constrained systems |
| Output Current | 80 mA - drives 100 Ω loads directly, eliminating need for output buffer stages in ADC interface designs |
Pinout & Package
The LMH6702MA is supplied in an 8-pin SOIC package (4.90 mm × 3.91 mm body size) with internal no-connect (NC) pins at positions 1, 5, and 8. This package variant provides thermal resistance RθJA = 133 °C/W and supports higher power dissipation than the SOT-23 option.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No connection | Internally unconnected; must be left floating or tied to ground per layout best practices |
| 2 | Inverting input | Current-summing node for feedback network; high-impedance input with −8 µA typical bias current |
| 3 | Non-inverting input | High-impedance voltage-sensing node; −6 µA typical bias current, 1.4 MΩ input resistance |
| 4 | Negative supply | Accepts −4 V to −6 V; requires low-ESR decoupling (e.g., 6.8 µF + 0.01 µF) referenced to clean ground |
| 5 | No connection | Internally unconnected; avoid routing traces or vias to this pad |
| 6 | Output | Capable of ±3.5 V swing into 100 Ω; 30 mΩ closed-loop output impedance minimizes gain error |
| 7 | Positive supply | Accepts +4 V to +6 V; decoupling identical to V−; CSS capacitor critical for HD2 optimization |
| 8 | No connection | Internally unconnected; electrically isolated from die; no thermal or electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback architecture | Enables 1.7 GHz bandwidth independent of closed-loop gain, eliminating traditional gain-bandwidth compromise |
| Ultra-low distortion at RF frequencies | −67 dBc OIM3 at 75 MHz supports wide dynamic range communication receiver IF stages |
| Optimized for ADC/DAC interface | 13.4 ns 0.1% settling and 1.83 nV/√Hz noise meet timing and SNR requirements of 10+ bit, >100 MSPS converters |
| Unity-gain stable without compensation | Eliminates external compensation components, reducing BOM count and layout sensitivity in high-speed circuits |
| VIP10™ bipolar process | Delivers 3100 V/µs slew rate and 80 mA output drive while maintaining <±4.5 mV input offset voltage |
Applications
| Flash A-D Driver | Wide Dynamic Range IF Amp |
|---|---|
Use Scenario: Driving the sampling input of a 10-bit, 100+ MSPS flash ADC in a software-defined radio front end. IC Role / Device Role / Timing Role: High-fidelity buffer that preserves signal integrity during acquisition window; provides fast settling to ensure accurate sample capture before hold phase. Use Value: −100 dBc HD2 at 5 MHz and 13.4 ns settling enable >9.5 ENOB at Nyquist frequency, exceeding CLC409 performance. |
Use Scenario: Amplifying 70–250 MHz IF signals in radar receivers requiring >70 dB spurious-free dynamic range. IC Role / Device Role / Timing Role: Wideband gain block with flat group delay (0.09° linear phase deviation DC–100 MHz) and low intermodulation. Use Value: −67 dBc OIM3 at 75 MHz and 1.7 GHz bandwidth allow simultaneous reception of closely spaced targets without spectral regrowth. |
| Radar and Communication Receivers | High Resolution Video |
Use Scenario: Baseband conditioning stage in automotive radar transceivers operating at 77 GHz with digitized IF outputs. IC Role / Device Role / Timing Role: Low-noise, low-distortion amplifier preceding ADC; handles large-signal transients without slewing-induced distortion. Use Value: 1.83 nV/√Hz input noise and 3100 V/µs slew rate maintain SNR across 100+ MHz instantaneous bandwidths. |
Use Scenario: RGB line driver in 4K/60 Hz broadcast video equipment requiring <0.024% differential gain error. IC Role / Device Role / Timing Role: DC-coupled video amplifier with precise gain flatness (120 MHz 0.1-dB bandwidth) and minimal phase distortion. Use Value: 0.024% DG and 0.004° DP at 3.58 MHz ensure color fidelity and edge sharpness in NTSC-compliant systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wideband op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6703MA | Higher supply current (15 mA), improved HD2 (−105 dBc @ 5 MHz), same SOIC-8 footprint | Better suited for ultra-low-distortion IF stages where power budget allows +2.5 mA per channel | Select when HD2 improvement >5 dB outweighs 20% higher quiescent power |
| THS3201D | Lower bandwidth (1.8 GHz), higher noise (2.1 nV/√Hz), different pinout (non-inverting input on Pin 3, inverting on Pin 2) | Compatible for gain-of-2 non-inverting configurations but requires PCB redesign for inverting topologies | Consider only for new designs where THS3201's rail-to-rail output swing is required |
Compared with LMH6702MA, LMH6703MA delivers measurable HD2 improvement at modest power cost, while THS3201D offers alternative output swing and noise trade-offs but demands layout revision - making LMH6702MA optimal for drop-in upgrades of CLC409/CLC449-based systems.
Availability
LMH6702MA is available at Aetrix Electronics and suitable for radar receivers, high-resolution video systems, and flash A-D converter interfaces requiring stable component supply across extended production lifecycles.
Supply support for LMH6702MA 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 company specializing in analog and embedded processing technologies, with leadership in high-speed op amps and precision signal chain solutions.
The LMH6702MA belongs to TI's ultra-wideband current-feedback op amp product line, engineered specifically for demanding RF, test equipment, and high-speed data acquisition applications where distortion, noise, and settling time are critical.
FAQ
What is the maximum recommended supply voltage for the LMH6702MA?
The LMH6702MA has an absolute maximum supply voltage rating of ±6.75 V, but its recommended operating range is ±4 V to ±6 V. Operation at ±5 V is typical and ensures optimal distortion and bandwidth performance as characterized in the datasheet. Exceeding ±6.75 V risks permanent damage, while operation below ±4 V may reduce output swing and slew rate.
Does the LMH6702MA require external compensation capacitors?
No, the LMH6702MA is unity-gain stable and does not require external compensation capacitors. Its current-feedback architecture inherently provides stability across gains ≥1 when used with the recommended 237 Ω feedback resistor. Adding compensation capacitors would degrade bandwidth and transient response without benefit.
How does package choice affect harmonic distortion in the LMH6702MA?
The SOT-23 package delivers −100 dBc HD2 and −96 dBc HD3 at 5 MHz, while the SOIC package measures −87 dBc HD2 and −98 dBc HD3 under identical conditions. This difference arises from shorter bond wires in the SOT-23, reducing supply-to-input coupling - a key distortion mechanism. The LMH6702MA (SOIC-8) reflects the SOIC performance profile.
Can the LMH6702MA drive a 50 Ω load effectively?
The LMH6702MA is specified for 100 Ω loads (e.g., −100 dBc HD2 at 5 MHz), but it can drive 50 Ω with reduced output swing (±3.2 V) and increased distortion (HD2 degrades ~3–5 dB). For sustained 50 Ω operation, verify thermal limits: RθJA = 133 °C/W and 12.5 mA supply current yield ~1.25 W dissipation - adequate with proper PCB copper area.
What is the purpose of the CSS capacitor in LMH6702MA applications?
The CSS capacitor (placed across V+ and V− supplies near the LMH6702MA) is critical for minimizing second-harmonic distortion. It shunts high-frequency supply transients away from the internal current mirrors. TI recommends a low-ESR ceramic capacitor (e.g., 0.1 µF) placed as close as possible to Pins 4 and 7 - omitting CSS increases HD2 by up to 15 dB in the 10–20 MHz band.
LMH6702MA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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
LMH6702MA FAQ
1.How can I place an order for LMH6702MA through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6702MA 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 LMH6702MA reliable?
The price and inventory of LMH6702MA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6702MA is usually 5 days.
3.What payment methods are accepted for LMH6702MA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6702MA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6702MA?
LMH6702MA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6702MA 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 LMH6702MA?
For technical support, including LMH6702MA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6702MA requirements.
6.How does Aetrix verify that LMH6702MA is sourced from the original manufacturer or authorized distributors?
All LMH6702MA 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 LMH6702MA meets industry standards.
7.What is the process for return or replacement of LMH6702MA?
All LMH6702MA units undergo pre-shipment inspection (PSI). If there is an issue with LMH6702MA, 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 LMH6702MA part is unused and in its original packaging.
Return procedure for LMH6702MA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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