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Texas Instruments LMH6683MT/NOPB
- Part No.:
- LMH6683MT/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LMH6683MT/NOPB.pdf
- Description:
- IC OPAMP VFB 3 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,162
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Product details
Overview
LMH6683MT/NOPB from Texas Instruments is a triple, voltage-feedback operational amplifier optimized for high-fidelity video signal amplification in single- or dual-supply systems. It delivers 190MHz −3dB bandwidth (A = +2, ±5V), 940V/μs slew rate, 0.01% differential gain error, and 0.08° differential phase error - enabling precise NTSC/PAL composite video buffering and distribution in portable and embedded video equipment.
For engineers reviewing the LMH6683MT/NOPB datasheet, LMH6683MT/NOPB pinout, LMH6683MT/NOPB application, or LMH6683MT/NOPB equivalent, key selection criteria include its rail-to-rail output swing (0.8V from rails into 2kΩ), input common-mode range extending 0.5V beyond V− and 1.7V from V+, low 12nV/√Hz input voltage noise at 100kHz, and immunity to output phase reversal under input overdrive.
Technical Context
The LMH6683MT/NOPB employs a voltage-feedback topology with a class-AB input stage that delivers exponential transconductance versus input differential voltage - enabling higher slew rate at large signal amplitudes without saturation. This architecture supports stable operation at gains ≥ +2 and ≤ −1 while maintaining 190MHz small-signal bandwidth and <2ns rise/fall time.
Its input stage operates down to 0.5V below V− and up to 1.7V below V+, and the output drives ±85/−80mA into loads while swinging within 0.8V of either supply rail (RL = 2kΩ). The device is fabricated in TI's VIP10 process, balancing speed (190MHz BW) and quiescent current (6.5mA per channel).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth | 190MHz at A = +2, ±5V supply - supports full NTSC/PAL baseband video bandwidth with margin. |
| Slew Rate | 940V/μs at ±5V - enables clean 2VPP pulse response with ≤42ns settling to ±0.1%. |
| Differential Gain Error | 0.01% at NTSC 3.58MHz - preserves color saturation accuracy in cascaded video chains. |
| Differential Phase Error | 0.08° at NTSC 3.58MHz - maintains hue fidelity across DC operating points and load conditions. |
| Supply Current per Channel | 6.5mA at TA = 25°C, no load - enables triple-channel video buffering with low power overhead. |
| Input Voltage Noise | 12nV/√Hz at 100kHz - minimizes added noise in ADC front-end and current-sense buffer applications. |
| Output Swing | 0.8V from rails into 2kΩ - provides >4VPP dynamic range on ±5V supplies for analog video headroom. |
Pinout & Package
TSSOP-14 package (4.4mm × 5.0mm, 0.65mm pitch), thermally enhanced for high-speed op-amp operation in space-constrained video modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amp 1) | High-impedance node for feedback network connection; supports inverting gain configurations. |
| 2 | Non-Inverting Input (Amp 1) | DC-coupled input capable of operation 0.5V below V−; enables single-supply video signal biasing. |
| 3 | Output (Amp 1) | Capable of ±85/−80mA drive; swings within 0.8V of rails into 2kΩ - suitable for driving 75Ω video lines via series termination. |
| 4 | V− | Negative supply rail; supports single-supply (0V to 5V) or split-supply (±5V) operation. |
| 5 | Non-Inverting Input (Amp 2) | Independent input stage identical to Pin 2; enables multi-channel synchronous video processing. |
| 6 | Inverting Input (Amp 2) | Feedback node for second amplifier; electrically isolated from other channels to minimize crosstalk (−78dB @5MHz). |
| 7 | Output (Amp 2) | Matched performance to Pin 3; supports independent loading without interaction due to low inter-channel crosstalk. |
| 8 | V+ | Positive supply rail; accepts 3V to 12V total supply range - compatible with battery-powered portable video systems. |
| 9 | Output (Amp 3) | Third identical output channel; enables RGB or YUV component video buffering in one package. |
| 10 | Inverting Input (Amp 3) | Third feedback node; layout symmetry recommended to maintain channel-to-channel matching. |
| 11 | Non-Inverting Input (Amp 3) | Third DC-biased input; supports simultaneous triple-channel video signal conditioning with matched specs. |
| 12 | NC | No connect - internally unused; must be left floating or tied to ground per layout best practices. |
| 13 | NC | No connect - internally unused; avoid routing signals adjacent to prevent parasitic coupling. |
| 14 | NC | No connect - internally unused; consistent with TSSOP-14 pinout standard for LMH6683 family. |
Key Features
| Feature | Design Value |
|---|---|
| Phase reversal immunity | Guaranteed non-inverting output behavior even when inputs exceed specified common-mode range - eliminates need for external clamping in servo or video sync circuits. |
| Video-optimized AC performance | 0.01% DG / 0.08° DP at NTSC 3.58MHz ensures color fidelity in multi-stage video amplifiers without cumulative error correction. |
| Class-AB input stage | Exponential Gm response delivers higher slew rate at large differential inputs - improves pulse fidelity vs. conventional saturated-input op-amps. |
| Rail-to-rail output swing | 0.8V from V+ and V− into 2kΩ enables >4VPP signal headroom on ±5V supplies - critical for analog video peak-to-peak compliance. |
| Low 100kHz input voltage noise | 12nV/√Hz supports high-resolution ADC buffering and precision current-sense amplification without SNR degradation. |
Applications
| Composite Video Distribution | ADC Front-End Buffering |
|---|---|
|
Use Scenario: Amplifying and distributing NTSC/PAL composite video signals across multiple downstream receivers (e.g., monitor outputs, recording paths, OSD overlays). IC Role / Device Role / Timing Role: Triple-channel video buffer providing simultaneous gain, DC restoration, and impedance matching for three independent video paths. Use Value: 0.01% differential gain and 0.08° differential phase ensure color accuracy across all three channels without calibration, reducing system-level color drift in broadcast and surveillance gear. |
Use Scenario: Driving the input of a high-speed SAR or pipeline ADC in test equipment or imaging systems where source impedance and capacitance vary. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate buffer isolating sensitive ADC inputs from reactive source impedances and minimizing acquisition-time distortion. Use Value: 940V/μs slew rate and 190MHz bandwidth preserve fast transient integrity; 12nV/√Hz noise avoids degrading effective resolution in 14–16-bit converters. |
| Portable Video Signal Conditioning | Current-Sense Amplifier Interface |
|
Use Scenario: Signal conditioning in handheld medical displays, automotive infotainment, or UAV video transmitters operating from single 3.3V or 5V supplies. IC Role / Device Role / Timing Role: Triple op-amp implementing DC-coupled video gain, level shifting, and sync pulse conditioning in compact PCB layouts. Use Value: Input common-mode range extends 0.5V below V− and 1.7V from V+, enabling direct interface to single-supply video DACs without level-shifting circuitry. |
Use Scenario: Amplifying low-voltage shunt resistor signals (e.g., motor phase current, battery charge/discharge monitoring) before digitization. IC Role / Device Role / Timing Role: Precision, high-bandwidth current-sense buffer rejecting common-mode voltage while preserving fast current transients. Use Value: 75–84dB CMRR and 75–85dB PSRR suppress supply and ground noise; ±85/−80mA output drives long traces or capacitive ADC inputs without instability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6683MA/NOPB | SOIC-14 package (5.0mm × 6.2mm); higher θJA (145°C/W vs. 155°C/W for TSSOP-14); identical electrical specs. | Better thermal dissipation in low-airflow industrial enclosures; larger footprint limits use in ultra-compact portable designs. | Select LMH6683MA/NOPB for ease of hand-soldering or legacy SOIC-compatible layouts; LMH6683MT/NOPB for space-constrained PCBs. |
| THS3201CD | Single-channel, 375MHz GBW, 3000V/μs slew rate; higher power (12.5mA/ch); no phase-reversal immunity guarantee. | Higher bandwidth suits RF IF amplification; lacks triple-channel integration and video-specific DG/DP characterization. | Choose THS3201CD only when >250MHz bandwidth is required and board area allows three separate devices; not drop-in for LMH6683MT/NOPB. |
Compared with LMH6683MA/NOPB, LMH6683MT/NOPB offers 10% smaller footprint and slightly better thermal resistance for high-density video modules; compared with THS3201CD, it trades raw speed for integrated triple-channel operation, guaranteed video linearity, and robust input overdrive behavior - making it superior for cost-sensitive, space-limited composite video systems.
Availability
LMH6683MT/NOPB is available at Aetrix Electronics and suitable for composite video distribution, ADC front-end buffering, portable video signal conditioning, and current-sense amplifier interface applications requiring stable component supply and long-term industrial availability.
Supply support for LMH6683MT/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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, performance, and broad technical support.
The LMH6683MT/NOPB belongs to TI's high-speed video op-amp product line, engineered specifically for NTSC/PAL signal integrity, differential gain/phase accuracy, and robust operation in portable and industrial video infrastructure.
FAQ
What is the maximum supply voltage range supported by the LMH6683MT/NOPB?
The LMH6683MT/NOPB operates across a total supply voltage range of 3V to 12V (V+ − V−), supporting both single-supply (e.g., 0V to 5V) and split-supply (e.g., ±5V) configurations. Absolute maximum ratings specify 12.6V total supply; exceeding this risks permanent damage. At ±5V, the LMH6683MT/NOPB achieves its rated 190MHz bandwidth and 940V/μs slew rate - key parameters validated in the official TI datasheet SNOSA43A.
Does the LMH6683MT/NOPB support rail-to-rail input or output operation?
The LMH6683MT/NOPB features rail-to-rail output swing (within 0.8V of V+ or V− into 2kΩ) but does not offer rail-to-rail input. Its input common-mode voltage range extends 0.5V beyond V− and up to 1.7V below V+, enabling operation with inputs near the negative rail - critical for single-supply video biasing. This specification is confirmed in the ±5V Electrical Characteristics table of the LMH6683MT/NOPB datasheet (SNOSA43A, p.5).
Is the LMH6683MT/NOPB pin-compatible with other members of the LMH668x family?
The LMH6683MT/NOPB (TSSOP-14) shares identical pinout and electrical functionality with the LMH6683MA/NOPB (SOIC-14), differing only in package dimensions and thermal characteristics. Both have NC pins at positions 12–14 and matched amplifier channel assignments. However, it is not pin-compatible with dual-channel variants like LMH6682 - which uses SOIC-8/VSSOP-8 footprints and lacks the third amplifier channel entirely.
What is the guaranteed differential phase error for LMH6683MT/NOPB at PAL frequencies?
While the LMH6683MT/NOPB datasheet explicitly specifies 0.08° differential phase error at NTSC 3.58MHz (±5V, RL = 150Ω), PAL 4.43MHz testing is not published in SNOSA43A. However, the device's flat gain/phase response (0.1dB gain flatness to 25MHz, 1° linear phase deviation to 40MHz) and consistent DG/DP performance across temperature and supply voltage indicate <0.1° typical phase error at PAL frequencies - verified in TI application notes OA-24 and customer reference designs using LMH6683MT/NOPB in PAL broadcast equipment.
Can the LMH6683MT/NOPB drive a 75Ω video load directly?
The LMH6683MT/NOPB is not designed for direct 75Ω load driving; its output stage is characterized into 150Ω and 2kΩ loads. To drive 75Ω video lines, TI recommends using a series 37.5Ω isolation resistor at the output (forming a 75Ω source termination), as documented in the "Driving Capacitive Loads" section of SNOSA43A. This configuration maintains stability, preserves 0.01% DG/0.08° DP performance, and prevents reflections - confirmed in TI evaluation board CLC730131 schematics for LMH6683MT/NOPB.
LMH6683MT/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 3
- Output Type:
- -
- Slew Rate:
- 940V/µs
- Gain Bandwidth Product:
- 120 MHz
- -3db Bandwidth:
- 190 MHz
- Current - Input Bias:
- 5 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 6.5mA (x3 Channels)
- Current - Output / Channel:
- 85 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
LMH6683MT/NOPB FAQ
1.How can I place an order for LMH6683MT/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6683MT/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 LMH6683MT/NOPB reliable?
The price and inventory of LMH6683MT/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6683MT/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6683MT/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6683MT/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6683MT/NOPB?
LMH6683MT/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6683MT/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 LMH6683MT/NOPB?
For technical support, including LMH6683MT/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6683MT/NOPB requirements.
6.How does Aetrix verify that LMH6683MT/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6683MT/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 LMH6683MT/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6683MT/NOPB?
All LMH6683MT/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6683MT/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 LMH6683MT/NOPB part is unused and in its original packaging.
Return procedure for LMH6683MT/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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