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Texas Instruments LMH6703MFX/NOPB
- Part No.:
- LMH6703MFX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
LMH6703MFX/NOPB.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,011
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Product details
Overview
LMH6703MFX/NOPB from Texas Instruments is a 1.2 GHz current-feedback operational amplifier optimized for ultra-high-fidelity signal conditioning in video, ADC/DAC interfaces, and wide-dynamic-range RF/IF systems. It delivers −69 dBc 2nd-harmonic distortion at 20 MHz (SOT-23-6), 4500 V/µs slew rate, 2.3 nV/√Hz input voltage noise, and integrated shutdown control - enabling high-resolution RGB video drivers and flash ADC front-ends.
For engineers reviewing the LMH6703MFX/NOPB datasheet, LMH6703MFX/NOPB pinout, LMH6703MFX/NOPB application, or LMH6703MFX/NOPB equivalent, key selection criteria include its current-feedback architecture requiring precise feedback resistor selection (560 Ω for SOT-23-6), shutdown timing (10 ns enable/disable), differential gain/phase performance (0.01%/0.02°), and load-dependent bandwidth trade-offs across 100–150 MHz flatness range.
Technical Context
The LMH6703MFX/NOPB employs a current-feedback topology where closed-loop bandwidth and stability are governed by feedback resistor value (560 Ω recommended for SOT-23-6), not gain setting - enabling stable operation from ±1 to ±10 V/V without external compensation. Its input stage features asymmetric bias currents (−20 µA non-inverting, ±44 µA inverting) and low-impedance inverting input (~30 Ω), demanding careful source impedance matching in inverting configurations.
Shutdown functionality is TTL-compatible (VIH ≥ 2.0 V, VIL ≤ 0.8 V) with 10 ns enable/disable transitions and <50 mVPP output glitch; disabled state draws 0.9 mA total supply current with unbalanced ICC/IEE due to internal pull-up. Thermal resistance is 182°C/W (Junction-to-Ambient, SOT-23-6), limiting continuous output current to ±90 mA under typical PCB layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3-dB Bandwidth | 1.2 GHz at AV = +2, VOUT = 0.5 VPP - supports 720p/1080p video pixel rates and >500 MSPS ADC sampling clocks. |
| 2nd Harmonic Distortion | −69 dBc at 20 MHz, 2 VPP (SOT-23-6) - preserves spectral purity in IF amplification and DDS post-amplification. |
| Slew Rate | 4500 V/µs - enables clean 6-V step response in <1.05 ns, critical for fast-settling DAC buffers. |
| Input Voltage Noise | 2.3 nV/√Hz above 1 MHz - minimizes added noise floor in wideband receiver front-ends. |
| Supply Current | 12.5 mA (enabled), 0.9 mA (disabled) - allows dynamic power gating in battery-sensitive portable test equipment. |
| Differential Gain/Phase | 0.01% / 0.02° at 4.43 MHz, 150 Ω load - meets broadcast-grade NTSC/PAL video linearity requirements. |
| Shutdown Response | 10 ns enable/disable time with <50 mVPP glitch - suitable for high-speed analog multiplexing in ATE systems. |
Pinout & Package
SOT-23-6 package (2.90 mm × 1.60 mm body size) with exposed pad thermal enhancement; pin 1 = NC, pin 2 = IN−, pin 3 = IN+, pin 4 = V−, pin 5 = SD, pin 6 = OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− (Pin 2) | Inverting input | Low-impedance node (~30 Ω) - requires matched RG for inverting gain; sensitive to trace inductance in >100 MHz layouts. |
| IN+ (Pin 3) | Non-inverting input | High-impedance node (1 MΩ) with 0.8 pF capacitance - dominates noise in non-inverting configurations. |
| V− (Pin 4) | Negative supply rail | Must be decoupled within 3 mm of pin using ≥100 nF ceramic + 1 µF tantalum; ground bounce here directly modulates offset. |
| SD (Pin 5) | Shutdown control (active-low) | TTL-compatible input; voltage-driven (not current-driven); must avoid exceeding −0.8 V below supply midpoint to prevent Zener damage. |
| OUT (Pin 6) | Amplifier output | Capable of ±90 mA into 100 Ω; requires series RISO (5–51 Ω) for stable drive into >5 pF capacitive loads. |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback architecture | Enables stable unity-gain operation without external compensation and maintains bandwidth independent of closed-loop gain via RF tuning. |
| Ultra-low harmonic distortion | −69 dBc 2nd-harmonic at 20 MHz ensures minimal spurious content in radar IF chains and communication receiver basebands. |
| Video-optimized linearity | 0.01% DG / 0.02° DP at 4.43 MHz meets SMPTE 259M and ITU-R BT.601 broadcast video standards for RGB/YUV distribution. |
| Fast, low-glitch shutdown | 10 ns enable/disable with <50 mVPP transient suppresses switching artifacts in multi-channel analog mux designs. |
| Wide supply range | Operates from ±4 V to ±6 V - supports legacy ±5 V systems and newer low-voltage precision instrumentation rails. |
Applications
| RGB Video Driver | Flash ADC Front-End |
|---|---|
|
Use Scenario: Driving 75 Ω coaxial cables for 1080p60 RGB signals in digital projectors and medical imaging displays. IC Role / Device Role / Timing Role: DC-coupled buffer with gain = +2, providing full-swing video output while preserving color fidelity and edge integrity. Use Value: 0.01% differential gain error prevents hue shift across brightness levels; 1.2 GHz bandwidth accommodates >165 MHz pixel clocks. |
Use Scenario: Conditioning analog inputs to 12-bit, 500 MSPS flash ADCs in high-speed data acquisition systems. IC Role / Device Role / Timing Role: Wideband driver with 2.3 nV/√Hz noise and −69 dBc distortion, minimizing aperture jitter and quantization error. Use Value: 12-bit ENOB maintained to 10 MHz due to low IMD3 (−80 dBc) and 10 ns settling time to 0.1%. |
| Radar IF Amplifier | DDS Post-Amplifier |
|
Use Scenario: Amplifying 50–200 MHz IF outputs from quadrature demodulators in pulsed-Doppler radar receivers. IC Role / Device Role / Timing Role: Low-noise, low-distortion gain block with 1800 MHz SSBW (AV = +1) to preserve pulse envelope fidelity. Use Value: 2.3 nV/√Hz input noise contributes <0.5 dB NF; −90 dBc 3rd-harmonic at 20 MHz avoids masking weak return signals. |
Use Scenario: Boosting DAC outputs from direct digital synthesizers in agile RF signal generators and jamming systems. IC Role / Device Role / Timing Role: High-slew-rate buffer (4500 V/µs) delivering clean, glitch-free sine waves up to 100 MHz. Use Value: 4500 V/µs slew rate supports >100 MHz full-scale sine generation; shutdown enables rapid frequency hopping. |
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 |
|---|---|---|---|
| LMH6702MF/NOPB | Lower bandwidth (1.0 GHz), no shutdown pin, same SOT-23-6 footprint and 560 Ω RF recommendation. | Lacks power-gating capability; unsuitable for time-multiplexed channel switching or low-power standby modes. | Select when shutdown is unnecessary and cost reduction is prioritized over 200 MHz bandwidth margin. |
| THS3201DGN | Higher slew rate (6000 V/µs), higher supply current (18 mA), SO-8 package only, no shutdown function. | Requires larger PCB area; lacks integrated disable control; optimized for single-supply 3.3 V systems with rail-to-rail output. | Choose for >200 MHz pulse fidelity where shutdown is managed externally and board space permits SO-8 layout. |
Compared with LMH6703MFX/NOPB, LMH6702MF/NOPB trades 200 MHz bandwidth and shutdown for lower cost and identical footprint, while THS3201DGN offers superior slew rate but sacrifices integration, package flexibility, and power management - making LMH6703MFX/NOPB optimal for space-constrained, multi-channel, low-power video/IF systems.
Availability
LMH6703MFX/NOPB is available at Aetrix Electronics and suitable for RGB video distribution, high-speed data acquisition, and radar IF amplification requiring stable component supply across industrial, medical, and test equipment lifecycles.
Supply support for LMH6703MFX/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 over 50 years of amplifier innovation.
The LMH™ amplifier product line targets ultra-high-bandwidth, low-distortion signal conditioning for video, communications, and instrumentation - with LMH6703MFX/NOPB specifically engineered for DC-coupled, sub-0.02° phase-critical applications.
FAQ
What is the recommended feedback resistor value for LMH6703MFX/NOPB in SOT-23-6 package?
The LMH6703MFX/NOPB datasheet specifies 560 Ω as the recommended feedback resistor for the SOT-23-6 package to achieve optimal bandwidth, gain flatness, and stability at AV = +2. Using values significantly lower than 560 Ω risks overshoot and oscillation; higher values reduce bandwidth. The LMH6703MFX/NOPB's current-feedback architecture makes RF selection critical - unlike voltage-feedback op amps where gain-setting resistors dominate stability.
Does LMH6703MFX/NOPB support single-supply operation?
LMH6703MFX/NOPB is specified for dual-supply operation (±4 V to ±6 V) and does not support true single-supply rail-to-rail input/output. Its input common-mode range is ±1.9 V, and output swing is ±3.4 V into high-Z loads - requiring level-shifting circuitry or external biasing for 0–5 V systems. The LMH6703MFX/NOPB shutdown pin is TTL-compatible only with split supplies; single-supply use demands careful SD voltage referencing to avoid damage.
How does LMH6703MFX/NOPB handle capacitive loads?
LMH6703MFX/NOPB requires a series output resistor (RISO) to stabilize operation into capacitive loads >5 pF. Recommended RISO values range from 5 Ω to 51 Ω depending on load capacitance (5–120 pF), per Figure 21 in the datasheet. Without RISO, the LMH6703MFX/NOPB exhibits peaking, ringing, or oscillation due to phase margin degradation - especially critical in PCB traces, cable drivers, and ADC input filtering networks.
What is the maximum output current capability of LMH6703MFX/NOPB?
The LMH6703MFX/NOPB delivers ±90 mA linear output current into 100 Ω loads at ±5 V supplies, with guaranteed ±55 mA minimum. This is limited by junction temperature rise and package thermal resistance (182°C/W for SOT-23-6). Sustained output currents above ±50 mA require aggressive PCB copper pour and thermal vias beneath the exposed pad to maintain reliability - the LMH6703MFX/NOPB's absolute maximum junction temperature is 150°C.
Can LMH6703MFX/NOPB be used in inverting configuration with 50 Ω source matching?
Yes - LMH6703MFX/NOPB supports 50 Ω source matching in inverting mode by selecting RG = RF/Gain and adding a termination resistor RT such that RT || RG = 50 Ω. For example, at AV = −5 V/V with RF = 460 Ω, RG = 92 Ω; adding RT = 109 Ω yields 50 Ω input impedance. However, the LMH6703MFX/NOPB's ~30 Ω inverting input impedance imposes practical limits - RG should not fall below 20 Ω to avoid gain-bandwidth collapse and non-ideal behavior.
LMH6703MFX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 4500V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.8 GHz
- Current - Input Bias:
- 7 µA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 11mA
- 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
LMH6703MFX/NOPB FAQ
1.How can I place an order for LMH6703MFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6703MFX/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 LMH6703MFX/NOPB reliable?
The price and inventory of LMH6703MFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6703MFX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6703MFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6703MFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6703MFX/NOPB?
LMH6703MFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6703MFX/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 LMH6703MFX/NOPB?
For technical support, including LMH6703MFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6703MFX/NOPB requirements.
6.How does Aetrix verify that LMH6703MFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6703MFX/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 LMH6703MFX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6703MFX/NOPB?
All LMH6703MFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6703MFX/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 LMH6703MFX/NOPB part is unused and in its original packaging.
Return procedure for LMH6703MFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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