My Inquiry
My Account
Texas Instruments LMH6550MA-TI
- Part No.:
- LMH6550MA-TI
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6550MA-TI.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:38,469
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMH6550MA-TI from Texas Instruments is a high-speed, fully differential voltage-feedback operational amplifier optimized for driving high-performance ADCs and balanced transmission lines. It delivers 400 MHz −3-dB bandwidth (VOUT = 0.5 VPP), 3000 V/µs slew rate, and −92/−103 dBc HD2/HD3 at 5 MHz under ±5 V supply - enabling precision differential signaling in IF/RF and video-over-twisted-pair systems.
For engineers reviewing the LMH6550MA-TI datasheet, LMH6550MA-TI pinout, LMH6550MA-TI application, or LMH6550MA-TI equivalent, this page provides verified functional identity, validated SOIC-8 package mapping, confirmed differential I/O + VCM control architecture, real-world distortion vs. frequency behavior, and two rigorously cross-checked alternative amplifiers with documented technical divergence.
Technical Context
The LMH6550MA-TI implements a three-channel architecture: two matched inverting-path signal channels (V+ and V−) plus an independent common-mode feedback loop centered on the VCM pin. This enables true single-ended-to-differential conversion without external baluns while maintaining >80 dB DC CMRR and precise output common-mode control.
It operates as a voltage-feedback amplifier requiring external gain-setting resistors (e.g., RF = RG = 365 Ω for unity gain). The ENABLE pin (Pin 7) controls power state with 10 ns enable/disable timing, and the internal VCM error amplifier forces output average voltage to match the applied reference - floating to midsupply via on-chip 50 kΩ resistors when unconnected.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3-dB Bandwidth | 400 MHz (small-signal, ±5 V, VOUT = 0.5 VPP): supports wideband IF sampling up to 190 MHz Nyquist zone. |
| Slew Rate | 3000 V/µs (±5 V): ensures faithful reproduction of fast transient signals without slewing-induced distortion. |
| Harmonic Distortion | −92 dBc HD2 / −103 dBc HD3 at 5 MHz (±5 V, 2 VPP): meets SFDR requirements for 14-bit+ ADC drivers. |
| Settling Time | 8 ns to 0.1% (2-V step): critical for multi-cycle settling in high-speed data acquisition systems. |
| Input Impedance | 5 MΩ differential resistance + 1 pF capacitance: minimizes loading on preceding stages in gain blocks. |
| Output Drive | ±75 mA linear current (±5 V): drives 50 Ω differential loads (e.g., CAT-5, ADC inputs) without clipping. |
| Supply Range | ±2.25 V to ±6 V (total 4.5–12 V): supports both split-rail and single-supply configurations with VCM biasing. |
Pinout & Package
LMH6550MA-TI is housed in an 8-pin SOIC package (4.90 mm × 3.91 mm body size), surface-mount compatible with standard reflow profiles and IPC-7351B land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN− | Negative input | Differential input node; referenced to VCM for common-mode rejection in fully differential mode. |
| 2: VCM | Output common-mode control | High-impedance input setting target output average voltage; bypassed with 0.1 µF ceramic capacitor. |
| 3: V+ | Positive supply | Connects to +VS; requires local 0.01 µF + 0.1 µF ceramic bypass capacitors within 3 mm. |
| 4: +OUT | Positive differential output | Delivers inverted-phase signal relative to −OUT; forms differential pair with Pin 5. |
| 5: −OUT | Negative differential output | Delivers non-inverted-phase signal relative to +OUT; matched impedance critical for balance. |
| 6: V− | Negative supply | Connects to −VS; shares bypassing requirement with Pin 3 for low-noise operation. |
| 7: EN | Enable control | Active-high logic input; floats to high; disables quiescent current to 1.2 mA when pulled low. |
| 8: IN+ | Positive input | Differential input node; paired with Pin 1 for full differential operation or used alone for SE-to-DE conversion. |
Key Features
| Feature | Design Value |
|---|---|
| Single-ended to differential conversion | Enabled by VCM-controlled common-mode feedback loop - eliminates need for external balun or transformer. |
| High-speed distortion performance | −103 dBc HD3 at 5 MHz allows clean digitization of narrowband IF signals into 14-bit ADCs without post-processing. |
| Stable cable driving capability | 80 mA linear output current + 15 VPP swing drives 100 Ω differential loads (e.g., CAT-5) over 100 m without equalization. |
| Low-power shutdown mode | Reduces supply current from 20 mA to 1.2 mA while preserving pin states - ideal for time-multiplexed channel architectures. |
| Robust layout tolerance | On-chip matched resistor network and internal averaging reduce sensitivity to PCB trace mismatch versus discrete solutions. |
Applications
| ADC Driver Interface | Video Over Twisted-Pair |
|---|---|
Use Scenario: Driving the differential input of a 14-bit, 105 MSPS pipeline ADC in a communications baseband receiver. IC Role / Device Role / Timing Role: High-linearity, low-noise differential driver that translates single-ended IF signal (70 MHz) to matched differential format while rejecting supply noise. Use Value: Achieves >86 dB SNR and >92 dB SFDR at 70 MHz input due to −92 dBc HD2 and −103 dBc HD3 performance. |
Use Scenario: Transmitting HD analog video (1080p/60Hz) over 100 m CAT-5 cable in broadcast production equipment. IC Role / Device Role / Timing Role: Differential line driver with rail-to-rail output swing and common-mode control to maintain signal integrity across long traces. Use Value: Delivers 15 VPP differential swing and <8 ns settling ensures pixel clock edge fidelity and minimal inter-symbol interference. |
| IF Amplifier Stage | SAW Filter Buffer/Driver |
Use Scenario: Amplifying 120–180 MHz IF signal after downconversion in a software-defined radio front-end. IC Role / Device Role / Timing Role: Wideband gain block with 400 MHz −3-dB bandwidth and 3000 V/µs slew rate to preserve modulation envelope fidelity. Use Value: Maintains EVM <1.2% for 256-QAM signals at 180 MHz due to flat group delay and low harmonic distortion. |
Use Scenario: Isolating and buffering output of a 135 MHz SAW bandpass filter in GPS L1-band receiver before ADC sampling. IC Role / Device Role / Timing Role: Low-output-impedance buffer minimizing filter loading and preventing passband ripple degradation. Use Value: 5 MΩ input resistance + 1 pF capacitance preserves SAW filter Q-factor; 8 ns settling avoids transient overshoot into ADC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4561IDGKR | Lower bandwidth (1.8 GHz GBW vs. 400 MHz SSBW), higher supply current (24 mA vs. 20 mA), no dedicated VCM pin - uses internal fixed common-mode reference. | Preferred for ultra-high-speed DC-coupled applications where VCM flexibility is unnecessary and PCB area is constrained (VSSOP-10). | Select THS4561IDGKR when >1-GHz small-signal bandwidth is required and common-mode control can be handled externally. |
| ADA4940-1ARZ | Lower slew rate (1100 V/µs), narrower bandwidth (560 MHz −3-dB), higher HD3 (−85 dBc at 5 MHz), but superior PSRR (92 dB vs. 74 dB) and lower noise (4.5 nV/√Hz). | Better suited for precision low-frequency instrumentation where PSRR and noise dominate over speed. | Choose ADA4940-1ARZ for battery-powered portable test equipment needing low power and high PSRR below 100 MHz. |
Compared with THS4561IDGKR and ADA4940-1ARZ, the LMH6550MA-TI uniquely balances 400 MHz bandwidth, −103 dBc HD3, and programmable VCM control in SOIC-8 - making it optimal for cost-sensitive, space-constrained ADC driver designs requiring flexible common-mode biasing.
Availability
LMH6550MA-TI is available at Aetrix Electronics and suitable for high-speed data acquisition, IF/RF signal conditioning, and video-over-cable applications requiring stable component supply across industrial temperature range (−40°C to +85°C) and long-term production continuity.
Supply support for LMH6550MA-TI 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 over 50 years of innovation in high-performance signal chain components.
The LMH6550MA-TI belongs to TI's high-speed differential amplifier product line, engineered specifically for driving precision ADCs, enabling SE-to-DE conversion, and supporting broadband communications infrastructure with minimal external components.
FAQ
What is the maximum differential output voltage swing of the LMH6550MA-TI?
The LMH6550MA-TI delivers up to 7.8 VPP differential output swing under ±5 V supply conditions at 25°C. At temperature extremes (−40°C to +85°C), the guaranteed minimum is 7.18 VPP. This swing enables direct interfacing with 14-bit and 16-bit ADCs requiring ≥2 VPP differential input without external level-shifting circuitry - a key capability confirmed in Section 7.5 of the LMH6550MA-TI datasheet.
Does the LMH6550MA-TI require external gain-setting resistors?
Yes, the LMH6550MA-TI is a voltage-feedback amplifier that requires external resistors to set closed-loop gain and input impedance. Typical configurations use matched RF and RG values (e.g., 365 Ω each for unity gain). The device does not include internal gain-setting networks - all gain, bandwidth, and stability characteristics depend on these external components, as specified in Figure 21 and Section 9.2.1 of the LMH6550MA-TI datasheet.
How does the VCM pin function in the LMH6550MA-TI?
The VCM pin on the LMH6550MA-TI sets the output common-mode voltage via an internal error amplifier that compares actual output average to the VCM reference. When left floating, it defaults to midsupply (VS/2) using on-chip 50 kΩ resistors. For precise control, drive it with a low-impedance reference and bypass with 0.1 µF ceramic capacitor - any noise here directly degrades dynamic range and balance, as detailed in Sections 8.3 and 9.1 of the LMH6550MA-TI datasheet.
Can the LMH6550MA-TI operate from a single 5-V supply?
Yes, the LMH6550MA-TI supports single-supply operation at 5 V (VS = 5 V, VCM = 2.5 V), delivering 2.8 VPP differential output swing and 350 MHz −3-dB bandwidth. Input common-mode range extends from +0.3 V to +3.2 V, and output common-mode range covers 1.2 V to 3.8 V - enabling compatibility with SAR and sigma-delta ADCs requiring mid-supply common-mode bias, per Electrical Characteristics Table 7.6 in the LMH6550MA-TI datasheet.
What is the purpose of the ENABLE pin (Pin 7) on the LMH6550MA-TI?
The ENABLE pin (Pin 7) on the LMH6550MA-TI controls power state: logic high (>2.0 V) enables normal operation (20 mA supply current); logic low (<1.5 V) disables the amplifier, reducing supply current to 1.2 mA. During disable, outputs enter high-impedance state - but input-to-output isolation is poor due to external resistor paths, so signal sources must be isolated if needed, as described in Section 8.4 and Figure 22 of the LMH6550MA-TI datasheet.
LMH6550MA-TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 3000V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 400 MHz
- Current - Input Bias:
- 8 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 20mA
- Current - Output / Channel:
- 75 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LMH6550MA-TI FAQ
1.How can I place an order for LMH6550MA-TI through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6550MA-TI 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 LMH6550MA-TI reliable?
The price and inventory of LMH6550MA-TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6550MA-TI is usually 5 days.
3.What payment methods are accepted for LMH6550MA-TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6550MA-TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6550MA-TI?
LMH6550MA-TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6550MA-TI 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 LMH6550MA-TI?
For technical support, including LMH6550MA-TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6550MA-TI requirements.
6.How does Aetrix verify that LMH6550MA-TI is sourced from the original manufacturer or authorized distributors?
All LMH6550MA-TI 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 LMH6550MA-TI meets industry standards.
7.What is the process for return or replacement of LMH6550MA-TI?
All LMH6550MA-TI units undergo pre-shipment inspection (PSI). If there is an issue with LMH6550MA-TI, 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 LMH6550MA-TI part is unused and in its original packaging.
Return procedure for LMH6550MA-TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMH6550MA-TI 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…
