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Texas Instruments LMH6655MMX/NOPB
- Part No.:
- LMH6655MMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMH6655MMX/NOPB.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,132
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Product details
Overview
LMH6655MMX/NOPB from Texas Instruments is a dual-channel, voltage-feedback operational amplifier optimized for high-speed, low-noise signal conditioning in ±2.5 V to ±6 V systems. It delivers 250 MHz unity-gain bandwidth, 200 V/µs slew rate, 4.5 nV/√Hz input voltage noise, and rail-to-rail output swing (±3.4 V into 100 Ω) - enabling precision ADC driving and video signal amplification in portable instrumentation.
For engineers reviewing the LMH6655MMX/NOPB datasheet, LMH6655MMX/NOPB pinout, LMH6655MMX/NOPB application, or LMH6655MMX/NOPB equivalent, key selection criteria include its dual-channel layout in VSSOP-8, channel-to-channel crosstalk of −80 dB at 5 MHz, differential gain/phase error of 0.01%/0.025° in NTSC video, and guaranteed operation across −40°C to +85°C industrial temperature range.
Technical Context
The LMH6655MMX/NOPB employs TI's VIP10™ complementary bipolar process to achieve unity-gain stability with 250 MHz bandwidth while consuming only 4.5 mA per channel. Its input common-mode range extends 150 mV below the negative rail and within 1.3 V of the positive rail, supporting true single-supply operation at 5 V.
Designed as a voltage-feedback amplifier, it features low distortion (−85 dBc third harmonic at 5 MHz), fast settling (25 ns to 0.01%), and robust drive capability (±145 mA short-circuit current). The dual architecture enables independent channel use or interleaved configurations without performance degradation due to crosstalk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 250 MHz - supports stable gain-of-1 operation up to RF applications and wideband video signals |
| Slew Rate | 200 V/µs - ensures faithful reproduction of fast transient signals without slew-induced distortion |
| Input Voltage Noise | 4.5 nV/√Hz - minimizes added noise in low-level sensor and preamp stages |
| Supply Current per Channel | 4.5 mA - enables dual-channel high-speed amplification with low power budget impact |
| Output Swing (RL = 100 Ω) | −3.6 V to +3.4 V - delivers >7 VPP dynamic range into moderate loads, critical for ADC driver headroom |
| Settling Time (0.01%) | 25 ns - meets timing requirements for high-throughput data acquisition systems |
| Crosstalk (ChA→ChB) | −80 dB at 5 MHz - preserves signal integrity in dual-path analog processing such as stereo audio or I/Q demodulation |
Pinout & Package
LMH6655MMX/NOPB is housed in an 8-pin VSSOP (DGK) package measuring 3.00 mm × 3.00 mm, optimized for space-constrained PCB layouts while maintaining thermal performance (RθJA = 235 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Channel A output - drives external load or next-stage input with low output impedance (0.08 Ω) |
| 2 | −IN A | Channel A inverting input - connects to feedback network for precise gain control |
| 3 | +IN A | Channel A non-inverting input - accepts high-impedance signal source with 4 MΩ common-mode input resistance |
| 4 | V− | Negative supply rail - supports dual-supply (±2.5 V to ±6 V) or single-supply (0 V to 5 V) operation |
| 5 | −IN B | Channel B inverting input - electrically isolated from Channel A with −80 dB crosstalk at 5 MHz |
| 6 | +IN B | Channel B non-inverting input - enables independent configuration of second channel for differential or parallel processing |
| 7 | OUT B | Channel B output - identical AC/DC performance to OUT A, allowing matched dual-path design |
| 8 | V+ | Positive supply rail - supplies both channels; PSRR of 76 dB ensures immunity to supply ripple |
Key Features
| Feature | Design Value |
|---|---|
| True single-supply operation | Input CMVR extends to −0.15 V (with 5 V supply), enabling direct interface to ground-referenced sensors |
| Rail-to-rail output swing | Delivers ±3.4 V into 100 Ω, maximizing dynamic range for 12-bit+ ADC drivers |
| Low distortion at high frequency | −85 dBc third-harmonic distortion at 5 MHz ensures fidelity in video and communication baseband paths |
| NTSC-optimized video performance | Differential gain/phase errors of 0.01% / 0.025° meet broadcast-grade analog video linearity requirements |
| Stable unity-gain configuration | No external compensation required - simplifies layout and reduces BOM count in follower and buffer designs |
Applications
| ADC Driver | Consumer Video |
|---|---|
Use Scenario: Driving the analog input of a 12-bit, 20 MSPS SAR ADC in a portable medical monitor. IC Role / Device Role / Timing Role: Buffer and level-shift sensor output to match ADC input range while preserving SNR and settling behavior. Use Value: 25 ns settling time and 4.5 nV/√Hz noise ensure full-scale accuracy and >70 dB SNR at Nyquist frequency. |
Use Scenario: Amplifying composite NTSC video signals in a set-top box front-end before digitization. IC Role / Device Role / Timing Role: Gain stage with DC restoration and bandwidth extension for luminance/chrominance separation. Use Value: 0.01% differential gain and 0.025° phase error prevent hue/saturation distortion in decoded video output. |
| Active Filter | Pulse Delay Circuit |
Use Scenario: Implementing a 4-pole Butterworth anti-aliasing filter preceding a high-speed data converter. IC Role / Device Role / Timing Role: Dual-channel op-amp configured as cascaded biquad sections with precise pole placement. Use Value: 250 MHz GBWP and low phase margin sensitivity enable accurate filter response up to 50 MHz cutoff. |
Use Scenario: Generating precisely timed delay pulses for laser diode triggering in industrial sensing equipment. IC Role / Device Role / Timing Role: High-slew-rate comparator replacement in a fast pulse-shaping circuit with adjustable delay. Use Value: 200 V/µs slew rate and 1.2 ns fall time preserve edge integrity for sub-10 ns pulse widths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, high-speed op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6655MAX/NOPB | Same silicon die, packaged in SOIC-8 (4.90 mm × 3.91 mm); higher RθJA (172 °C/W) vs. VSSOP-8 (235 °C/W) | Better thermal dissipation in high-power-density boards; larger footprint limits ultra-compact designs | Select LMH6655MAX/NOPB when board space permits and thermal management prioritizes conduction over convection |
| THS3202DGN | Higher supply current (12 mA/channel), wider bandwidth (1.8 GHz), but higher noise (9.5 nV/√Hz) and no NTSC-verified video specs | Preferred for RF IF amplification where speed dominates SNR; unsuitable for broadcast video linearity | Choose THS3202DGN only when >1 GHz bandwidth is mandatory and video fidelity is not required |
Compared with LMH6655MAX/NOPB, the LMH6655MMX/NOPB offers superior board-area efficiency and adequate thermal performance for most portable applications; versus THS3202DGN, it trades raw bandwidth for lower noise, lower power, and verified video signal integrity - making it optimal for cost-sensitive, battery-powered instrumentation and consumer video systems.
Availability
LMH6655MMX/NOPB is available at Aetrix Electronics and suitable for ADC driver, consumer video, active filter, and pulse delay circuits requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.
Supply support for LMH6655MMX/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 specializing in analog and embedded processing technologies, with decades of expertise in high-performance op-amps and signal chain solutions.
The LMH6655MMX/NOPB belongs to TI's LMH66xx family of low-noise, high-speed voltage-feedback amplifiers, engineered specifically for portable, power-sensitive applications demanding wide bandwidth, precision linearity, and robust single/dual-supply operation.
FAQ
What is the operating temperature range for LMH6655MMX/NOPB?
The LMH6655MMX/NOPB is specified for continuous operation from −40°C to +85°C ambient temperature. This industrial-grade range is validated across all key parameters including bandwidth, slew rate, and output swing, ensuring reliability in embedded instrumentation and outdoor consumer devices where thermal cycling occurs.
Does LMH6655MMX/NOPB support single-supply operation?
Yes, LMH6655MMX/NOPB supports true single-supply operation down to 5 V (0 V to 5 V). Its input common-mode voltage range extends to −0.15 V (150 mV below ground) and up to 3.7 V, while output swings from 1.1 V to 3.7 V into 100 Ω - enabling direct interfacing with ground-referenced sources and mid-supply-biased ADCs without level-shifting circuitry.
What is the maximum capacitive load LMH6655MMX/NOPB can drive stably?
LMH6655MMX/NOPB remains stable driving up to 100 pF without isolation resistance. For loads exceeding 100 pF, TI recommends adding a series isolation resistor (e.g., 50 Ω) between the output and capacitive load - as shown in Figure 41 of the datasheet - to maintain ≥48° phase margin and prevent peaking or oscillation in closed-loop configurations.
How does LMH6655MMX/NOPB compare to LMH6654 in terms of pin compatibility?
LMH6655MMX/NOPB (dual) and LMH6654 (single) are not pin-compatible. The LMH6655MMX/NOPB uses an 8-pin VSSOP with dedicated pins for both channels (e.g., OUT A, −IN A, +IN A, OUT B, −IN B, +IN B), whereas LMH6654 in SOIC-8 shares V+ and V− but lacks Channel B terminals. Board redesign is required when substituting between them.
Is LMH6655MMX/NOPB suitable for driving 150 Ω video loads?
Yes, LMH6655MMX/NOPB is explicitly characterized for 150 Ω video loads: differential gain error is 0.01% and differential phase error is 0.025° under AV = +2, NTSC, RL = 150 Ω conditions. Its output stage delivers sufficient current (±145 mA short-circuit) and maintains low distortion (−80 dBc second harmonic), meeting broadcast video linearity standards.
LMH6655MMX/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:
- -
- Slew Rate:
- 200V/µs
- Gain Bandwidth Product:
- 260 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 4.5mA (x2 Channels)
- Current - Output / Channel:
- 120 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-VSSOP
LMH6655MMX/NOPB FAQ
1.How can I place an order for LMH6655MMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6655MMX/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 LMH6655MMX/NOPB reliable?
The price and inventory of LMH6655MMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6655MMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6655MMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6655MMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6655MMX/NOPB?
LMH6655MMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6655MMX/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 LMH6655MMX/NOPB?
For technical support, including LMH6655MMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6655MMX/NOPB requirements.
6.How does Aetrix verify that LMH6655MMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6655MMX/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 LMH6655MMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6655MMX/NOPB?
All LMH6655MMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6655MMX/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 LMH6655MMX/NOPB part is unused and in its original packaging.
Return procedure for LMH6655MMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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