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Texas Instruments LMH6502MAX/NOPB
- Part No.:
- LMH6502MAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6502MAX/NOPB.pdf
- Description:
- IC VARIABLE GAIN 1 CIRC 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,126
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Product details
Overview
LMH6502MAX/NOPB from Texas Instruments (formerly National Semiconductor) is a wideband, linear-in-dB voltage-controlled variable gain amplifier (VGA) with differential inputs and current-feedback output stage. It delivers 130MHz −3dB bandwidth, 70dB gain adjustment range up to 10MHz, ±75mA linear output current, and <350mV output-referred DC offset over full VG control range. It serves as a precision gain-control stage in AGC loops and video signal chains.
For engineers reviewing the LMH6502MAX/NOPB datasheet, LMH6502MAX/NOPB pinout, LMH6502MAX/NOPB application, or LMH6502MAX/NOPB equivalent, key selection criteria include guaranteed gain matching (±0.6dB at max gain), linear-in-dB control response, 1800V/µs slew rate for large-signal fidelity, and SOIC-14 package compatibility with single- or dual-supply operation.
Technical Context
The LMH6502MAX/NOPB integrates a differential input transconductance stage followed by a high-speed current-feedback op amp. Gain is controlled via a 0V to +2V voltage applied to pin 2 (VG), where device internal transistor pair Q1/Q2 steers signal current between paths to set attenuation ratio linearly in dB.
Its architecture enables stable operation into 100Ω loads without external compensation, supports differential or single-ended input configurations, and maintains ≤±0.3dB gain flatness up to 30MHz within specified attenuation bands - critical for wideband video and RF IF gain control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth | 130MHz - supports full HD video baseband and IF signals up to 100MHz without roll-off |
| Gain Adjustment Range | 72dB @ f < 10MHz - enables >6-decade dynamic range control in AGC systems |
| Slew Rate | 1800V/µs - preserves edge integrity for fast-pulse video and radar waveforms |
| Output Current | ±75mA - drives 100Ω loads directly without external buffers |
| Input Voltage Noise | 7.7nV/√Hz - low-noise performance suitable for low-level signal amplification |
| Gain Matching | ±0.6dB @ AV(MAX) - ensures consistent channel-to-channel gain in multi-path systems |
| Supply Current | 27mA @ ±5V - low power consumption for portable or thermally constrained designs |
Pinout & Package
LMH6502MAX/NOPB is housed in a 14-pin SOIC package (NSC drawing M14A), 8.65mm × 3.91mm body, 1.27mm pitch, with exposed pad not present. Pin 11 is ground reference for VG control; pin 2 is gain control input (VG); pins 3 and 6 are differential inputs; pin 10 is output.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Inverting Input of Output Amplifier | Feedback node for current-feedback output stage; connects to RF resistor |
| Pin 2 | Gain Control Voltage Input (VG) | 0V to +2V relative to pin 11 sets gain linearly in dB; bias current −300µA at 0V |
| Pin 3 | Non-Inverting Differential Input (+VIN) | Differential input terminal; common-mode range ±2.2V; input resistance 750kΩ |
| Pin 4 | RG Terminal (−) | Connects to RG resistor; carries signal current proportional to VIN_DIFF |
| Pin 5 | RG Terminal (+) | Connects to RG resistor; completes differential input current path |
| Pin 6 | Inverting Differential Input (−VIN) | Differential input terminal; matched to pin 3 for CMRR >72dB |
| Pin 7 | V− Supply | Negative supply rail; supports ±2.5V to ±6V operation |
| Pin 8 | V+ Supply | Positive supply rail; total supply voltage range 5V to 12V |
| Pin 9 | NC | No internal connection; must be left unconnected |
| Pin 10 | Output (VOUT) | Current-feedback output; drives 100Ω load to ±3.2V; output impedance 0.1Ω |
| Pin 11 | Ground Reference | Reference point for VG and VCM; tied to virtual half-supply in single-supply mode |
| Pin 12 | I− Input | Internal current node sensitive to stray capacitance; requires minimal trace area |
| Pin 13 | NC | No internal connection; must be left unconnected |
| Pin 14 | NC | No internal connection; must be left unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Linear-in-dB gain control | Enables precise, predictable AGC loop design with constant dB/V scaling across 70dB range |
| Differential input architecture | Provides >72dB CMRR and rejects noise on long traces - essential for low-level sensor or video signal conditioning |
| Current-feedback output stage | Delivers 1800V/µs slew rate and ±75mA drive into 100Ω without stability compromise |
| Guaranteed gain accuracy | ±0.6dB max error at VG = 2.0V ensures repeatable system-level gain calibration |
| Single-supply compatible VG range | 0V to +2V referenced to pin 11 allows direct interface with DACs or microcontroller GPIO in 3.3V/5V systems |
Applications
| Video Imaging Processing | Automatic Gain Control (AGC) |
|---|---|
Use Scenario: Amplifying analog RGB or YUV video signals prior to ADC sampling in broadcast cameras or medical endoscopes. IC Role / Device Role / Timing Role: Precision VGA stage providing programmable gain to maintain constant signal amplitude despite varying scene illumination or sensor output. Use Value: 70dB linear-in-dB range and <±0.3dB gain flatness up to 30MHz preserve color fidelity and luma transient response across full HD bandwidth. | Use Scenario: Closed-loop signal level stabilization in RF receiver IF stages or optical transceiver front-ends. IC Role / Device Role / Timing Role: Core gain-control element whose VG input is driven by an integrator monitoring rectified output envelope. Use Value: Guaranteed ±0.6dB device-to-device gain matching ensures consistent AGC threshold behavior across production units. |
| Variable Attenuator | Voltage-Controlled Filter |
Use Scenario: Programmable signal attenuation in test equipment signal generators or lab-grade oscilloscope input channels. IC Role / Device Role / Timing Role: Digitally controlled attenuator replacing mechanical potentiometers or relay-based stepped attenuators. Use Value: 130MHz bandwidth and 1800V/µs slew rate support accurate attenuation of fast-rise pulses and wideband noise sources. | Use Scenario: Tunable low-pass or bandpass filtering in software-defined radio (SDR) receivers using gain-dependent pole placement. IC Role / Device Role / Timing Role: Active filter gain stage where VG adjusts cutoff frequency while preserving phase linearity. Use Value: Linear-phase deviation <1.5° up to 60MHz and group delay variation <2.5ns enable minimal distortion in modulated signal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar variable gain amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6503MAX/NOPB | Linear-in-V gain control (not linear-in-dB); 100MHz bandwidth; same SOIC-14 package | Better suited for linear gain interpolation (e.g., digital pot emulation), less ideal for logarithmic AGC | Select when gain vs. control voltage must be linear rather than exponential/dB-scaled |
| AD8367ARUZ | 500MHz bandwidth; 45dB gain range; 5V single-supply only; different pinout and biasing | Higher-frequency RF/IF applications (e.g., cellular infrastructure), but lacks guaranteed gain matching | Choose for >200MHz signal paths where extended bandwidth outweighs need for tight gain tolerance |
Compared with LMH6502MAX/NOPB, LMH6503MAX/NOPB trades logarithmic control for linear gain law and slightly lower bandwidth, while AD8367ARUZ offers higher speed and wider bandwidth at the expense of guaranteed gain matching and SOIC-14 footprint compatibility.
Availability
LMH6502MAX/NOPB is available at Aetrix Electronics and suitable for video imaging processing, automatic gain control, variable attenuator, and voltage-controlled filter applications requiring stable component supply and long-term industrial availability.
Supply support for LMH6502MAX/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 acquired National Semiconductor in 2011 and maintains its high-performance analog portfolio. TI specializes in precision amplifiers, data converters, and interface ICs for industrial, automotive, and communications markets.
The LMH6502MAX/NOPB belongs to TI's LMH™ high-speed amplifier family, engineered for wideband signal conditioning in video, instrumentation, and communications systems where gain accuracy, bandwidth, and low distortion are critical.
FAQ
What is the maximum supply voltage rating for LMH6502MAX/NOPB?
The absolute maximum supply voltage (V+ − V−) for LMH6502MAX/NOPB is 12.6V. Operating ratings specify a functional range of 5V to 12V total supply, with tested performance at ±5V (10V total) and ±2.5V (5V total). Exceeding 12.6V risks permanent damage per Absolute Maximum Ratings.
Does LMH6502MAX/NOPB support true single-supply operation?
Yes - LMH6502MAX/NOPB supports single-supply operation by tying pin 11 (GND) to a virtual mid-rail voltage (e.g., V+/2). The VG control range remains 0V to +2V relative to pin 11, enabling direct interface with 3.3V or 5V DAC outputs. Input common-mode range extends to ±2.2V, accommodating typical single-supply signal levels.
What is the guaranteed gain matching specification for LMH6502MAX/NOPB?
LMH6502MAX/NOPB guarantees device-to-device gain matching of ±0.6dB at maximum gain (VG = +2V), as specified in the Electrical Characteristics table. This tolerance holds across temperature (−40°C to +85°C) and ensures consistent channel gain in multi-amplifier systems like video switchers or phased-array receivers.
Can LMH6502MAX/NOPB drive a 50Ω load directly?
LMH6502MAX/NOPB is fully characterized and stable driving a 100Ω load, delivering ±3.2V output swing. Driving 50Ω is possible but reduces output voltage swing and increases power dissipation; thermal limits and potential high-frequency peaking require verification. For 50Ω systems, a series 50Ω resistor at the output is recommended to isolate capacitive loads and ensure stability.
What is the purpose of pins 9, 13, and 14 on LMH6502MAX/NOPB?
Pins 9, 13, and 14 on LMH6502MAX/NOPB are no-connect (NC) terminals with no internal connection. They must remain unconnected in PCB layout. Leaving them floating or tying them to ground may introduce parasitic coupling or violate package routing rules defined in the NSC M14A drawing.
LMH6502MAX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Variable Gain
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1800V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 130 MHz
- Current - Input Bias:
- 9 µA
- Voltage - Input Offset:
- -
- Current - Supply:
- 27mA
- Current - Output / Channel:
- 90 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LMH6502MAX/NOPB FAQ
1.How can I place an order for LMH6502MAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6502MAX/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 LMH6502MAX/NOPB reliable?
The price and inventory of LMH6502MAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6502MAX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6502MAX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6502MAX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6502MAX/NOPB?
LMH6502MAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6502MAX/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 LMH6502MAX/NOPB?
For technical support, including LMH6502MAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6502MAX/NOPB requirements.
6.How does Aetrix verify that LMH6502MAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6502MAX/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 LMH6502MAX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6502MAX/NOPB?
All LMH6502MAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6502MAX/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 LMH6502MAX/NOPB part is unused and in its original packaging.
Return procedure for LMH6502MAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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