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Texas Instruments LMH6643QMMX/NOPB
- Part No.:
- LMH6643QMMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMH6643QMMX/NOPB.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,201
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Product details
Overview
LMH6643QMMX/NOPB from Texas Instruments is a dual, rail-to-rail output, voltage-feedback operational amplifier optimized for low-power, high-speed applications. It delivers 130 MHz −3 dB bandwidth (±5 V), 135 V/µs slew rate, ±75 mA linear output current, and 40 mV from rails output swing - enabling high-fidelity video buffering and precision ADC driving in automotive and portable systems.
For engineers reviewing the LMH6643QMMX/NOPB datasheet, LMH6643QMMX/NOPB pinout, LMH6643QMMX/NOPB application, or LMH6643QMMX/NOPB equivalent, key selection criteria include its AEC-Q100 Grade 3 qualification, 2.7–10 V supply range, −62 dBc THD at 5 MHz, and dual-channel VSSOP-8 package with independent input/output terminals per channel.
Technical Context
The LMH6643QMMX/NOPB employs a voltage-feedback architecture with fully differential input stage and Class AB output stage, supporting stable operation across gain settings (AV = +1 to +10) without phase reversal when CMVR is exceeded. Its 0.1 dB gain flatness extends to 12 MHz under 150 Ω load at AV = +2, ensuring minimal signal distortion in wideband video paths.
Designed for single- or split-supply operation, it features input common-mode range extending 0.5 V below V− and 1 V from V+, and rail-to-rail output swing within 40 mV of either supply. Output short-circuit protection is rated for infinite duration at VS < 6 V, with thermal shutdown limiting junction temperature to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 130 MHz at ±5 V, AV = +1 - supports full HD video signal amplification up to ~75 MHz fundamental content. |
| Slew Rate | 135 V/µs (±5 V, AV = −1) - enables clean 2 VPP output at 5 MHz without slewing-induced distortion. |
| Output Current | ±75 mA linear drive - drives 150 Ω video loads or multiple 10 kΩ ADC inputs simultaneously. |
| Input Voltage Noise | 17 nV/√Hz at 100 kHz - preserves SNR in precision sensor front-ends and low-level analog signal chains. |
| THD | −62 dBc at 5 MHz, 2 VPP, AV = +2 - meets broadcast-grade video distortion requirements (DG/DP ≤ 0.01%). |
| Supply Range | 2.7 V to 10 V - operates from single 3.3 V logic rails or ±5 V analog supplies without level-shifting. |
| Quiescent Current | 2.7 mA per channel - enables dual-channel high-speed amplification with < 6 mW total dissipation at 3 V. |
Pinout & Package
VSSOP-8 (DGK0008A) package, 3.00 mm × 3.00 mm body size, 0.65 mm lead pitch, thermally enhanced exposed pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A (Pin 1) | Channel A output | Drives first load; rail-to-rail swing supports full dynamic range in single-supply video buffers. |
| −IN A (Pin 2) | Channel A inverting input | Accepts feedback network; high-impedance node for precision gain-setting resistor placement. |
| +IN A (Pin 3) | Channel A non-inverting input | High-Z input with 0.5 V beyond V− CMVR - enables ground-referenced sensor interfacing. |
| V− (Pin 4) | Negative supply | Reference for dual-supply operation; tied to GND in single-supply configs (V− = 0 V). |
| V+ (Pin 5) | Positive supply | Supports 2.7–10 V; internal biasing scales with supply for consistent performance across voltage ranges. |
| −IN B (Pin 6) | Channel B inverting input | Independent of Channel A - enables dual-path signal conditioning without crosstalk (47 dB rejection @ 5 MHz). |
| +IN B (Pin 7) | Channel B non-inverting input | Matches Pin 3 electrical specs; allows synchronous dual-channel ADC input buffering. |
| OUT B (Pin 8) | Channel B output | Electrically isolated from OUT A; supports stereo audio, dual-sensor, or redundant safety outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Within 40 mV of V+ or V− - maximizes usable dynamic range in 3.3 V or 5 V systems. |
| No output phase reversal | CMVR exceeded safely - prevents latch-up or signal inversion during overdrive in video sync detection. |
| AEC-Q100 Grade 3 | −40 °C to +85 °C operating range - qualified for automotive infotainment and ADAS camera modules. |
| Low distortion at high frequency | −62 dBc THD @ 5 MHz - maintains color fidelity and timing integrity in NTSC/PAL video reconstruction. |
| Fast settling time | 68 ns to ±0.1% - meets 12-bit ADC sampling window requirements for multiplexed sensor arrays. |
Applications
| Video Signal Amplification | ADC Input Buffering |
|---|---|
Use Scenario: Driving composite video signals (NTSC/PAL) from SoC DAC outputs to coaxial transmission lines or display drivers. IC Role / Device Role / Timing Role: Dual-channel buffer with matched gain and phase response; Channel A handles luminance, Channel B handles chrominance. Use Value: 0.01% DG/DP and 47 dB crosstalk rejection preserve color accuracy and eliminate ghosting between Y/C channels. | Use Scenario: Conditioning analog sensor outputs (e.g., pressure, temperature) before 12-bit SAR ADC sampling in automotive ECUs. IC Role / Device Role / Timing Role: Low-noise, fast-settling driver that settles within 68 ns to ±0.1%, meeting ADC aperture time constraints. Use Value: 17 nV/√Hz input noise and ±75 mA drive ensure >72 dB SNR and full-scale step response without droop. |
| Current Sense Amplification | Portable Video Interface |
Use Scenario: Amplifying mV-level shunt voltage drops in battery management ICs for real-time charge/discharge monitoring. IC Role / Device Role / Timing Role: High CMRR (>95 dB) differential amplifier with rail-to-rail output, referenced to system ground. Use Value: Input CMVR extends to −0.5 V (at 3 V supply), enabling accurate sensing below ground in high-side configurations. | Use Scenario: Level-shifting and buffering RGB signals from mobile processor GPU outputs to micro-display panels. IC Role / Device Role / Timing Role: Dual op-amp providing independent R/G channel amplification with matched bandwidth (130 MHz) and gain flatness. Use Value: 135 V/µs slew rate sustains 1080p60 pixel clock edges (≤ 1.5 ns rise time) without overshoot or ringing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6643MME/NOPB | Same silicon, VSSOP-8 package, but commercial-grade (non-AEC-Q100); identical electrical specs. | Lacks automotive qualification; unsuitable for safety-critical vehicle systems. | Select LMH6643QMMX/NOPB for automotive designs requiring AEC-Q100 Grade 3 compliance. |
| OPA2350UA/2K5 | Lower bandwidth (38 MHz), lower slew rate (22 V/µs), higher quiescent current (5.5 mA/ch), no AEC-Q100 rating. | Better DC precision (50 µV VOS), suited for low-frequency precision instrumentation, not video or fast ADC buffering. | Choose OPA2350UA/2K5 only when ultra-low offset dominates over speed and power constraints. |
Compared with LMH6643MME/NOPB, the LMH6643QMMX/NOPB adds automotive qualification without sacrificing AC performance; versus OPA2350UA/2K5, it trades DC precision for 3.4× higher bandwidth and 6× faster slew rate - critical for video and high-sample-rate data acquisition.
Availability
LMH6643QMMX/NOPB is available at Aetrix Electronics and suitable for automotive camera modules, industrial ADC front-ends, and portable video interfaces requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LMH6643QMMX/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 company specializing in analog and embedded processing technologies, with leadership in high-performance op-amps, data converters, and automotive-grade ICs.
The LMH6643QMMX/NOPB belongs to TI's LMH664X family of low-power, high-speed rail-to-rail output amplifiers, designed specifically for automotive video, ADC buffering, and portable instrumentation where speed, power efficiency, and ruggedness are co-prioritized.
FAQ
What is the maximum supply voltage for LMH6643QMMX/NOPB?
The LMH6643QMMX/NOPB supports a supply voltage range of 2.7 V to 10 V (V+ − V−), with absolute maximum ratings up to 13.5 V. Operation above 10 V risks exceeding safe junction temperature limits and invalidates AEC-Q100 qualification. For ±5 V operation, total supply is 10 V - well within recommended conditions.
Does LMH6643QMMX/NOPB support single-supply operation?
Yes, LMH6643QMMX/NOPB supports true single-supply operation down to 2.7 V. Its input common-mode range extends 0.5 V below V− (i.e., to −0.5 V when V− = 0 V), and output swings within 40 mV of both rails - enabling ground-referenced inputs and rail-to-rail outputs in 3.3 V systems without external level shifters.
What is the typical THD performance of LMH6643QMMX/NOPB at 5 MHz?
The LMH6643QMMX/NOPB achieves −62 dBc total harmonic distortion at 5 MHz, VO = 2 VPP, AV = +2, and RL = 2 kΩ (±5 V supply). This value is measured under standard test conditions and reflects its suitability for broadcast-quality video and high-fidelity signal chain applications where spectral purity is critical.
Is LMH6643QMMX/NOPB pin-compatible with other devices in the LMH664X family?
No - LMH6643QMMX/NOPB (dual, VSSOP-8) is not pin-compatible with LMH6642Q-Q1 (single, SOT-23-5). Pin mapping differs fundamentally: LMH6643QMMX/NOPB uses Pins 1–3 and 6–8 for Channel A/B I/O plus shared V+/V−, while LMH6642Q-Q1 has only five pins. Interchange requires PCB redesign.
What thermal considerations apply to LMH6643QMMX/NOPB in VSSOP-8 packages?
The LMH6643QMMX/NOPB in VSSOP-8 (DGK) has a junction-to-ambient thermal resistance (RθJA) of 235 °C/W. At 2.7 mA/ch quiescent current and 2 VPP output into 2 kΩ, power dissipation remains low (< 15 mW), keeping junction temperature well below 150 °C even at +85 °C ambient - provided PCB copper area meets minimum layout guidelines in the datasheet.
LMH6643QMMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 135V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 130 MHz
- Current - Input Bias:
- 1.6 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 2.7mA (x2 Channels)
- Current - Output / Channel:
- 75 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 10 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
LMH6643QMMX/NOPB FAQ
1.How can I place an order for LMH6643QMMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6643QMMX/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 LMH6643QMMX/NOPB reliable?
The price and inventory of LMH6643QMMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6643QMMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6643QMMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6643QMMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6643QMMX/NOPB?
LMH6643QMMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6643QMMX/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 LMH6643QMMX/NOPB?
For technical support, including LMH6643QMMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6643QMMX/NOPB requirements.
6.How does Aetrix verify that LMH6643QMMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6643QMMX/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 LMH6643QMMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6643QMMX/NOPB?
All LMH6643QMMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6643QMMX/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 LMH6643QMMX/NOPB part is unused and in its original packaging.
Return procedure for LMH6643QMMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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