My Inquiry
My Account
Texas Instruments LMH6639MF
- Part No.:
- LMH6639MF
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
LMH6639MF.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,311
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMH6639MF 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, 33ns settling time (±0.1%), and integrated shutdown control. It delivers 110mA linear output current and operates from 3V to 12V single supply or ±5V dual supply, enabling use in portable video buffers and ADC front-ends.
For engineers reviewing the LMH6639MF datasheet, LMH6639MF pinout, LMH6639MF application, or LMH6639MF equivalent, key selection criteria include its rail-to-rail output swing (40mV from rails), low 3.6mA supply current in active mode, 400μA shutdown current, 0.186Ω closed-loop output resistance at 1MHz, and no output phase reversal over full input common-mode range (−0.2V to 4V).
Technical Context
The LMH6639MF employs TI's VIP10 process to achieve high-speed performance with low power. Its voltage-feedback architecture supports stable operation at unity gain, with fully characterized performance across 3V, 5V, and ±5V supplies and guaranteed −3dB bandwidth of ≥130MHz at 5V.
It integrates anti-parallel input diodes with series resistors for input protection, features a dedicated shutdown pin (THSD = V+ − 1.65V), and exhibits excellent overdrive recovery (TON = 83ns, TOFF = 160ns) - critical for multiplexing and fast-switching applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth | 190MHz at AV = +1, 5V supply - enables high-fidelity signal amplification up to UHF frequencies. |
| Slew Rate | 172V/μs - supports full-power bandwidth of ~28MHz for 2VPP signals without distortion. |
| Settling Time | 33ns to ±0.1% - ensures accurate sampling in high-speed data acquisition systems. |
| Output Swing | 40mV from either rail (RL = 2kΩ) - maximizes dynamic range in low-voltage 3V/5V systems. |
| Supply Current | 3.6mA active / 400μA shutdown - reduces power in battery-powered portable video and sensor interfaces. |
| Input CMVR | −0.2V to 4V (VS = 5V) - allows true single-supply operation with ground-referenced inputs. |
| THD | −60dBc at 5MHz, AV = +2 - meets video-grade linearity requirements for NTSC differential gain (0.12%) and phase (0.045°). |
Pinout & Package
SOT-23-6 package: ultra-compact 6-pin surface-mount outline with exposed thermal pad (JEDEC MO-178AC), optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V+) | Positive Supply Rail | Accepts 3V–12V single supply or +5V in dual-supply configuration; must be decoupled with 100nF capacitor. |
| 2 (−IN) | Inverting Input | Differential input node; protected by anti-parallel diodes and series resistors per internal topology. |
| 3 (+IN) | Non-inverting Input | High-impedance input (6.88MΩ, 1.32pF); supports DC-coupled or AC-coupled signal sources. |
| 4 (V−) | Negative Supply Rail | Ground reference in single supply; −5V in dual supply; requires local 100nF bypass. |
| 5 (OUT) | Amplifier Output | Rail-to-rail capable (40mV from rails); drives 150Ω loads directly; closed-loop Rout = 0.266Ω at 1MHz. |
| 6 (SD) | Shutdown Control Input | CMOS-compatible logic input; device disables when SD ≤ V+ − 1.65V; draws −30μA when pulled to 0V. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full dynamic range in 3V/5V systems - output reaches within 40mV of V+ or V−, preserving SNR. |
| Integrated shutdown mode | Reduces quiescent current to 400μA and isolates output (−70dB @ 1MHz), enabling power-gating in multi-channel systems. |
| No output phase reversal | Guaranteed stability over entire input common-mode range (−0.2V to 4V), eliminating latch-up risk in sensor interfaces. |
| Fast overdrive recovery | 83ns turn-on and 160ns turn-off times support time-division multiplexing of video or RF signals. |
| Video-optimized linearity | 0.12% differential gain / 0.045° differential phase at NTSC 3.58MHz - suitable for composite video buffering without external compensation. |
Applications
| Active Filters | ADC Buffer Amplifier |
|---|---|
Use Scenario: Second-order Sallen-Key low-pass filter for anti-aliasing before a 10-bit, 20MSPS ADC in a medical sensor front-end. IC Role / Device Role / Timing Role: Voltage-feedback op-amp configured as unity-gain buffer and filter integrator; provides low-output-impedance drive to ADC sample capacitor. Use Value: 190MHz bandwidth and 33ns settling ensure <0.1% step error on full-scale transitions; rail-to-rail output maximizes ENOB at 3.3V supply. | Use Scenario: Driving the input of a SAR ADC in a portable data logger with 3V battery supply. IC Role / Device Role / Timing Role: Single-supply buffer with input referenced to mid-rail (V+/2); maintains signal integrity during ADC acquisition window. Use Value: −0.2V to 4V input CMVR accommodates ground-referenced sensors; 40mV output swing preserves >98% of 3V full-scale range. |
| Portable Video | Current Sense Buffer |
Use Scenario: Composite video output driver in a handheld DVD player feeding 75Ω coaxial cable. IC Role / Device Role / Timing Role: Gain-of-two non-inverting amplifier with 150Ω load termination; compensates for cable loss and maintains NTSC timing. Use Value: 0.12% differential gain and 0.045° phase error meet broadcast video specs; shutdown mode cuts power during standby. | Use Scenario: Amplifying mV-level shunt voltage in a 12V automotive body-control module with 5V MCU interface. IC Role / Device Role / Timing Role: High-speed, low-offset current-sense amplifier with bidirectional capability and fast transient response. Use Value: 5mV typical VOS and 8μV/°C drift minimize offset error; 110mA output current drives heavy capacitive loads (e.g., long PCB traces). |
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 |
|---|---|---|---|
| LMH6642MF | Higher 280MHz bandwidth, 2x supply current (7.2mA), no shutdown pin | Better for >200MHz signal chains; unsuitable where low-power shutdown is required | Select LMH6642MF only if bandwidth >220MHz is mandatory and shutdown is unnecessary. |
| OPA355DBVR | 150MHz bandwidth, 5.5mA supply current, rail-to-rail I/O, no shutdown | Limited to lower-frequency video or audio; lacks disable function for power sequencing | Choose OPA355DBVR for cost-sensitive, non-shutdown applications needing rail-to-rail input/output. |
Compared with LMH6639MF, LMH6642MF trades 400μA shutdown capability and 3.6mA active current for higher bandwidth, while OPA355DBVR offers simpler biasing but omits shutdown control - making LMH6639MF the sole option among the three with integrated power gating and 190MHz performance.
Availability
LMH6639MF is available at Aetrix Electronics and suitable for portable video, ADC buffering, and current sensing applications requiring stable component supply, consistent parametric performance across temperature (−40°C to +85°C), and long-term industrial availability.
Supply support for LMH6639MF 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-speed op-amps and precision signal chain solutions.
The LMH6639MF belongs to TI's high-speed voltage-feedback op-amp product line, designed specifically for low-power, rail-to-rail output applications in portable instrumentation, video infrastructure, and data acquisition systems.
FAQ
What is the maximum supply voltage for the LMH6639MF?
The LMH6639MF has an absolute maximum supply voltage (V+ to V−) of 13.5V. Its operating rating is 3V to 12V for single supply or ±5V for dual supply. Exceeding 13.5V risks permanent damage; operation above 12V is not characterized and violates recommended conditions.
Does the LMH6639MF require external compensation for unity-gain stability?
No, the LMH6639MF is internally compensated and stable at unity gain (AV = +1). The datasheet confirms guaranteed −3dB bandwidth of 190MHz and flat frequency response down to gain +1, with no external components needed for stability in standard configurations.
How does the shutdown pin (SD) interface with 3.3V logic?
The LMH6639MF shutdown threshold is V+ − 1.65V. When V+ = 5V, SD activates below 3.35V - compatible with 3.3V logic HIGH (≥3.3V) keeping the device enabled and LOW (≤0.4V) triggering shutdown. For 3.3V-only systems, tie V+ to 3.3V so THSD ≈ 1.65V, matching standard logic thresholds.
Can the LMH6639MF drive a 50Ω transmission line directly?
Yes - the LMH6639MF delivers 110mA linear output current and sustains 4.4V swing into 50Ω at 5V supply. However, for optimal signal integrity, use series termination (e.g., 45Ω resistor at output) to match 50Ω impedance and prevent reflections, especially above 50MHz.
What is the input protection scheme used in the LMH6639MF?
The LMH6639MF uses two anti-parallel silicon diodes between inputs plus series resistors (several hundred ohms) to clamp differential input voltages to <±2VBE. ESD diodes also connect each input to V+ and V− rails, conducting when pins exceed rails by ~1V - protecting against transients and overvoltage during shutdown or comparator-mode operation.
LMH6639MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- VIP10™
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- 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:
- SOT-23-6
LMH6639MF FAQ
1.How can I place an order for LMH6639MF through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6639MF 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 LMH6639MF reliable?
The price and inventory of LMH6639MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6639MF is usually 5 days.
3.What payment methods are accepted for LMH6639MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6639MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6639MF?
LMH6639MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6639MF 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 LMH6639MF?
For technical support, including LMH6639MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6639MF requirements.
6.How does Aetrix verify that LMH6639MF is sourced from the original manufacturer or authorized distributors?
All LMH6639MF 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 LMH6639MF meets industry standards.
7.What is the process for return or replacement of LMH6639MF?
All LMH6639MF units undergo pre-shipment inspection (PSI). If there is an issue with LMH6639MF, 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 LMH6639MF part is unused and in its original packaging.
Return procedure for LMH6639MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMH6639MF Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
