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Texas Instruments LMH6639MA
- Part No.:
- LMH6639MA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6639MA.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,587
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Product details
Overview
LMH6639MA from Texas Instruments is a rail-to-rail output voltage-feedback operational amplifier with 190MHz −3dB bandwidth (AV = +1, VS = 5V), 172V/µs slew rate, and integrated shutdown control. It delivers 110mA linear output current, settles in 33ns (±0.1%), and operates from 3V to 12V single supply or ±5V dual supply - ideal for high-speed ADC buffering and portable video signal conditioning.
For engineers reviewing the LMH6639MA datasheet, LMH6639MA pinout, LMH6639MA application, or LMH6639MA equivalent, key selection criteria include rail-to-rail output swing (40mV from rails at 5V), low 3.6mA quiescent current, fast 83ns turn-on time, and robust input protection architecture with anti-parallel diodes and series resistors.
Technical Context
The LMH6639MA employs TI's VIP10 process to achieve high bandwidth with low power. Its voltage-feedback topology supports stable operation at unity gain, with no phase reversal over full common-mode input range (−0.2V to 4V at 5V supply) and excellent video performance (0.12% differential gain, 0.045° differential phase).
Shutdown functionality is controlled by a V+−referenced SD pin (threshold ≈ V+ − 1.65V), enabling <400μA off-state current. The device features built-in ESD protection (2kV HBM), input clamping diodes, and output short-circuit protection - critical for multiplexing and hot-swap applications where rapid enable/disable and signal integrity are essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth | 190MHz at AV = +1, 5V supply - enables full-bandwidth amplification of HD video baseband signals without attenuation. |
| Slew Rate | 172V/µs - supports clean 28MHz full-power bandwidth for 2VPP outputs, minimizing distortion in fast transient response. |
| Output Swing | 40mV from rails (5V supply, RL = 2kΩ) - maximizes dynamic range in low-voltage systems like battery-powered video interfaces. |
| Supply Current | 3.6mA enabled / 400μA disabled - reduces system power budget during idle periods without external circuitry. |
| Settling Time | 33ns to ±0.1% - meets timing requirements for high-speed data acquisition and multiplexed analog front-ends. |
| Input CMVR | −0.2V to 4V (5V supply) - allows direct interfacing to ground-referenced sensors and DACs without level-shifting. |
| THD | −60dBc at 5MHz, AV = +2 - satisfies broadcast-grade video fidelity requirements per NTSC standards. |
Pinout & Package
LMH6639MA is packaged in SOIC-8 (8-pin small-outline integrated circuit) with standard pin mapping and thermal resistance θJA = 190°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V+) | Positive Supply Rail | Accepts 3V–12V single supply or +5V in dual-supply mode; powers internal bias and output stage. |
| 2 (−IN) | Inverting Input | Differential input node; protected by anti-parallel diodes and series resistor to limit fault current. |
| 3 (+IN) | Non-Inverting Input | High-impedance input node; supports rail-to-rail common-mode range down to −0.2V below V−. |
| 4 (V−) | Negative Supply Rail | Ground reference for single supply or −5V in dual-supply mode; defines lower output swing limit. |
| 5 (OUTPUT) | Amplified Output | Rail-to-rail capable; drives 150Ω loads with ≤100mV saturation voltage and 110mA sourcing/sinking capability. |
| 6 (N/C) | No Connect | Internally unused; must be left floating or tied to ground per layout best practices. |
| 7 (SD) | Shutdown Control Input | V+−referenced logic input; pulls low ( |
| 8 (N/C) | No Connect | Internally unused; must be left floating or tied to ground per layout best practices. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full 4.9VPP output on 5V supply, preserving signal headroom in space-constrained portable designs. |
| Integrated shutdown control | Reduces system power by >90% (3.6mA → 0.4mA) with sub-100ns transition times - eliminates need for external enable logic. |
| Video-optimized distortion performance | 0.12% differential gain and 0.045° differential phase ensure minimal color error in composite video amplification. |
| Robust input protection | Anti-parallel diode + series resistor network limits input current under overvoltage or shutdown-induced mismatch conditions. |
| Stable unity-gain operation | Guaranteed phase margin across 3V–12V supply range and temperature (−40°C to +85°C) - simplifies PCB layout and compensation. |
Applications
| ADC Buffer Amplifier | Portable Video Signal Conditioning |
|---|---|
Use Scenario: Driving SAR or pipeline ADC inputs with fast-settling, low-noise analog signals in handheld test equipment. IC Role / Device Role / Timing Role: High-speed buffer isolating sensor front-end from ADC sampling capacitance; provides 33ns settling to meet 30MSPS timing budgets. Use Value: Eliminates acquisition errors from source impedance mismatch and ensures full ENOB retention at high sampling rates. |
Use Scenario: Amplifying RGB or YUV baseband video signals in battery-powered tablets and digital cameras. IC Role / Device Role / Timing Role: Rail-to-rail output driver maintaining signal integrity across 0–10MHz video bandwidth with minimal group delay variation. Use Value: Preserves color fidelity (0.12% DG/0.045° DP) and extends battery life via 400μA shutdown current during display sleep modes. |
| Active Filter Stage | Current Sense Buffer |
Use Scenario: Implementing 2nd-order Sallen-Key or MFB filters in motor control feedback loops requiring >100kHz cutoff. IC Role / Device Role / Timing Role: Low-output-impedance gain stage shaping frequency response while rejecting noise from switching power supplies. Use Value: Enables precise filter Q-factor control with 0.186Ω closed-loop output resistance, reducing sensitivity to PCB trace inductance. |
Use Scenario: Isolating and scaling shunt voltage signals in high-side current monitoring for DC-DC converters and battery management. IC Role / Device Role / Timing Role: Precision buffer with rail-to-rail input (−0.2V to 4V) accepting bidirectional shunt voltages near ground or VBUS. Use Value: Supports accurate low-side and high-side sensing without level shifters, improving measurement resolution at millivolt-level inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6642MAX | Higher 280MHz bandwidth but 5.5mA supply current; no shutdown pin; SOIC-8 package. | Lacks integrated disable function - requires external enable circuitry for power cycling. | Select when maximum bandwidth is critical and shutdown is managed externally. |
| OPA695IDBVT | 370MHz bandwidth, 1100V/µs slew rate, but 12.5mA supply current; no rail-to-rail output; SOT-23-6 package. | Output swing limited to 1.2V from rails - unsuitable for low-voltage video or ADC buffering requiring full dynamic range. | Select for ultra-high-speed applications where output swing headroom is less critical than raw speed. |
Compared with LMH6639MA, LMH6642MAX trades shutdown capability for higher bandwidth and higher quiescent current, while OPA695IDBVT offers superior speed but sacrifices rail-to-rail output and power efficiency - making LMH6639MA optimal for portable, power-sensitive, video/ADC applications requiring integrated enable control.
Availability
LMH6639MA is available at Aetrix Electronics and suitable for ADC buffer amplifiers, portable video signal conditioning, and active filter stages requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LMH6639MA 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 and embedded processing technologies, with decades of expertise in high-performance op-amps and precision signal chain solutions.
The LMH6639MA belongs to TI's high-speed voltage-feedback op-amp product line, designed specifically for applications demanding wide bandwidth, fast settling, rail-to-rail output, and low-power shutdown - including video, communications, and data acquisition systems.
FAQ
What is the maximum supply voltage range supported by the LMH6639MA?
The LMH6639MA operates across a supply voltage range of 3V to 12V for single-supply configurations, or ±5V for dual-supply operation. Absolute maximum ratings specify a 13.5V differential between V+ and V−, but guaranteed performance is specified only within the 3V–12V or ±5V operating ranges. Exceeding these may cause parametric degradation or reliability risk.
Does the LMH6639MA support rail-to-rail input operation?
No - the LMH6639MA features rail-to-rail *output* swing (within 40mV of either rail at 5V), but its input common-mode voltage range is −0.2V to 4V (at 5V supply), meaning it accepts inputs 0.2V below V− and up to 1V below V+. It does not support true rail-to-rail input operation, unlike some newer TI op-amps such as the OPA355.
How does the shutdown pin (SD) interface with 3.3V logic?
The LMH6639MA SD pin is referenced to V+, so for a 5V supply, it triggers shutdown when pulled below ≈3.35V (V+ − 1.65V). A 3.3V logic high is insufficient to guarantee normal operation; tie SD directly to V+ or use a pull-up resistor to V+ to ensure reliable enable. For 3.3V-only systems, level-shifting or open-drain logic with pull-up to V+ is required.
Can the LMH6639MA drive a 150Ω video load while maintaining specified THD?
Yes - the LMH6639MA is fully characterized driving 150Ω loads at AV = +2, delivering −60dBc THD at 5MHz with 2VPP output. Its 110mA linear output current and 0.186Ω closed-loop output resistance ensure minimal gain error and distortion under video load conditions, meeting NTSC broadcast specifications (0.12% DG / 0.045° DP).
Is the LMH6639MA pin-compatible with other TI high-speed op-amps in SOIC-8?
No - the LMH6639MA has a unique SOIC-8 pinout (V+, −IN, +IN, V−, OUTPUT, N/C, SD, N/C) that differs from standard TI op-amps like the OPA695 (which uses different pin assignments for power and shutdown). Direct replacement requires PCB redesign; always verify pin mapping against the specific device's connection diagram before substitution.
LMH6639MA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- VIP10™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 200V/µs
- Gain Bandwidth Product:
- 90 MHz
- -3db Bandwidth:
- 228 MHz
- Current - Input Bias:
- 1.4 µA
- Voltage - Input Offset:
- 1.3 mV
- Current - Supply:
- 4.18mA
- Current - Output / Channel:
- 112 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:
- 8-SOIC
LMH6639MA FAQ
1.How can I place an order for LMH6639MA through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6639MA 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 LMH6639MA reliable?
The price and inventory of LMH6639MA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6639MA is usually 5 days.
3.What payment methods are accepted for LMH6639MA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6639MA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6639MA?
LMH6639MA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6639MA 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 LMH6639MA?
For technical support, including LMH6639MA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6639MA requirements.
6.How does Aetrix verify that LMH6639MA is sourced from the original manufacturer or authorized distributors?
All LMH6639MA 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 LMH6639MA meets industry standards.
7.What is the process for return or replacement of LMH6639MA?
All LMH6639MA units undergo pre-shipment inspection (PSI). If there is an issue with LMH6639MA, 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 LMH6639MA part is unused and in its original packaging.
Return procedure for LMH6639MA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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