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Texas Instruments LMH6622MM
- Part No.:
- LMH6622MM
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMH6622MM.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,341
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Product details
Overview
LMH6622 from Texas Instruments is a dual wideband, low-noise voltage-feedback operational amplifier optimized for DSL receive pre-amplification. It delivers 160 MHz bandwidth (AV = +2), 1.6 nV/√Hz input voltage noise, 85 V/μs slew rate, and −90 dBc 2nd harmonic distortion at 1 MHz - enabling high-fidelity signal recovery in xDSL analog front ends.
For engineers reviewing the LMH6622 datasheet, LMH6622 pinout, LMH6622 application, or LMH6622 equivalent, this page provides verified specifications, dual-channel pin mapping, xDSL-specific performance context, thermal and supply-range validation, and two confirmed alternative op-amps for low-noise, high-linearity receive-path designs.
Technical Context
The LMH6622 employs a voltage-feedback architecture with stable operation for closed-loop gains ≥ +2 or ≤ −1. Its VIP10 process enables simultaneous high bandwidth and ultra-low noise - critical for DMT-based ADSL/VDSL receivers where 255 subcarriers must be resolved within 100 kHz–1.1 MHz with line-referred noise ≤ −140 dBm/Hz.
It supports both split-supply (±2.5 V to ±6 V) and single-supply (5 V to 12 V) operation, with input common-mode range extending to −4.75 V and +5.7 V under ±6 V bias. Output swing reaches ±4.6 V into 100 Ω, and linear output current is rated at 90 mA per channel - sufficient to drive ADC inputs directly while maintaining >90 dBc distortion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (AV = +2) | 160 MHz - enables full DMT spectrum capture up to 1.1 MHz with flat gain and minimal phase error |
| Input Voltage Noise | 1.6 nV/√Hz - ensures receiver noise floor remains below −140 dBm/Hz requirement in ADSL CPE |
| Slew Rate | 85 V/μs - supports fast transient response without slewing-induced distortion on multi-tone signals |
| Supply Voltage Range | ±2.5 V to ±6 V or +5 V to +12 V - compatible with legacy and modern DSL chipset power rails |
| Harmonic Distortion (HD2) | −90 dBc at 1 MHz, RL = 100 Ω - preserves signal integrity across all 255 DMT carriers |
| Output Swing (RL = 100 Ω) | ±4.6 V - drives 12-bit+ ADCs with headroom for overvoltage transients |
| Supply Current (per amp) | 4.3 mA - enables dual-channel amplification within tight thermal budgets of CPE modems |
Pinout & Package
LMH6622 is available in 8-pin SOIC (D) and 8-pin VSSOP (DGK) packages. Both share identical pinout and electrical characteristics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A (Pin 1) | Channel A output | Drives first receive path (e.g., ADSL upstream or differential ADC input) |
| −IN A (Pin 2) | Channel A inverting input | Accepts inverted summing node in hybrid coupler implementation (e.g., driver cancellation) |
| +IN A (Pin 3) | Channel A non-inverting input | Connected to line-side transformer center-tap or reference for common-mode stability |
| V− (Pin 4) | Negative supply rail | Must be decoupled locally; supports split-supply operation down to −2.5 V |
| +IN B (Pin 5) | Channel B non-inverting input | Used for second receive path or complementary signal processing (e.g., downstream band) |
| −IN B (Pin 6) | Channel B inverting input | Configured identically to Pin 2 for matched channel performance |
| OUT B (Pin 7) | Channel B output | Drives second receive path or differential pair for noise rejection |
| V+ (Pin 8) | Positive supply rail | Must be decoupled locally; supports single-supply operation up to +12 V |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel low-noise architecture | 1.6 nV/√Hz voltage noise and 1.5 pA/√Hz current noise - minimizes contribution to system noise floor in line-referenced applications |
| High linearity at RF frequencies | −90 dBc HD2 and −94 dBc HD3 at 1 MHz - prevents intermodulation between closely spaced DMT tones |
| Wide supply flexibility | Operates from ±2.5 V to ±6 V or +5 V to +12 V - eliminates need for dedicated low-voltage LDOs in mixed-rail DSL systems |
| Robust output drive capability | 90 mA linear output current and ±4.6 V swing into 100 Ω - directly interfaces with high-speed ADC drivers without external buffers |
| Stable at AV ≥ +2 or AV ≤ −1 | No external compensation required for standard gain configurations - simplifies layout and reduces BOM count |
Applications
| ADSL/VDSL Receive Preamp | Ultrasound Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying weak, multi-tone DMT signals (100 kHz–1.1 MHz) from telephone line after hybrid coupler, prior to ADC sampling. IC Role / Device Role / Timing Role: Dual-channel low-noise preamplifier performing gain, driver-signal cancellation, and common-mode level shifting. Use Value: Meets ADSL spectral mask requirements with −78 dBc upstream MTPR and −70 dBc downstream MTPR at ±6 V supply. |
Use Scenario: Boosting low-amplitude echo signals from piezoelectric transducers before digitization in portable ultrasound systems. IC Role / Device Role / Timing Role: Wideband, low-noise gain stage preserving time-of-flight resolution and SNR across 1–15 MHz bandwidth. Use Value: 160 MHz bandwidth and 2.3 ns rise/fall time enable accurate pulse-echo timing with sub-nanosecond jitter. |
| Low-Noise Instrumentation Front End | Active Filter Stage |
|
Use Scenario: First-stage amplification in precision data acquisition systems measuring microvolt-level sensor outputs (e.g., strain gauges, thermopiles). IC Role / Device Role / Timing Role: Differential input preamplifier rejecting common-mode interference while adding minimal noise and offset drift. Use Value: 75–100 dB CMRR and ±2.5 μV/°C offset drift ensure stable DC-coupled measurements over industrial temperature range (−40°C to +85°C). |
Use Scenario: Implementing high-Q, low-distortion active filters (e.g., Chebyshev, elliptic) in communication baseband chains. IC Role / Device Role / Timing Role: Unity-gain-stable voltage-feedback op-amp serving as integrator or gain block in filter feedback paths. Use Value: 0.1 dB gain flatness up to 30 MHz (±6 V) ensures amplitude accuracy across entire passband without peaking or droop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, wideband operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6624 | Single-channel, 1.0 nV/√Hz noise, 1.8 GHz GBW, higher supply current (6.5 mA) | Higher bandwidth but no dual-channel integration; requires two devices for same functionality | Preferred when ultimate noise performance is prioritized over channel count and power efficiency |
| OPA2837 | 1.8 nV/√Hz noise, 200 MHz GBW, rail-to-rail output, lower slew rate (45 V/μs) | Wider output swing range but reduced slew rate limits large-signal fidelity in DMT applications | Selected for single-supply systems needing RRO and moderate noise, not for high-slew xDSL front ends |
Compared with LMH6622, LMH6624 offers lower noise but lacks dual-channel integration and increases board area and supply load, while OPA2837 trades slew rate and harmonic distortion for rail-to-rail convenience - making LMH6622 uniquely balanced for dual-path, low-noise, high-linearity DSL receive amplification.
Availability
LMH6622 is available at Aetrix Electronics and suitable for xDSL modems, ultrasound imaging systems, precision instrumentation, and active filter designs requiring stable component supply, guaranteed traceability, and long-term lifecycle support.
Supply support for LMH6622 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 communications ICs.
The LMH6622 belongs to TI's high-speed, low-noise op-amp product line, engineered specifically for broadband communication front ends where simultaneous low noise, high linearity, and dual-channel integration are mandatory - especially in DSL, fiber access, and medical ultrasound.
FAQ
What supply voltages does the LMH6622 support?
The LMH6622 operates from ±2.5 V to ±6 V in dual-supply mode and from +5 V to +12 V in single-supply configuration. At ±6 V, it delivers full 160 MHz bandwidth and ±4.6 V output swing into 100 Ω. The LMH6622 maintains functional performance across this full range without external compensation or bias adjustment.
Is the LMH6622 suitable for ADSL2+ and VDSL2 applications?
Yes - the LMH6622 meets key ADSL2+/VDSL2 analog front-end requirements: its 160 MHz bandwidth covers extended downstream bands up to 17 MHz, −90 dBc HD2 distortion prevents inter-carrier interference, and −70 dBc downstream MTPR at ±6 V satisfies full-rate DMT spectral purity mandates. The LMH6622 has been validated in TI reference designs for both standards.
Does the LMH6622 require external compensation for stability?
No - the LMH6622 is internally compensated and stable for closed-loop gains ≥ +2 (non-inverting) or ≤ −1 (inverting). It does not require external capacitors or resistors for stability in standard configurations. This simplifies PCB layout and improves reliability in space-constrained DSL modem designs using the LMH6622.
How does the LMH6622 handle input common-mode voltage in single-supply operation?
In +5 V to +12 V single-supply mode, the LMH6622 supports an input common-mode range from −1.25 V to +2.2 V (at ±2.5 V supply) up to −4.75 V to +5.7 V (at ±6 V), enabling direct interface with transformer-coupled line signals without level-shifting circuitry. This capability is essential for maintaining signal integrity in the LMH6622-based DSL receive path.
What is the thermal performance of the LMH6622 in VSSOP package?
The LMH6622 in VSSOP (DGK) package has a junction-to-ambient thermal resistance (RθJA) of 211°C/W. At 4.3 mA per amplifier and ±6 V supply, total power dissipation is ~51.6 mW per channel. With proper PCB copper pour and airflow, the LMH6622 remains well below its 150°C max junction temperature - critical for sustained operation in sealed CPE enclosures using the LMH6622.
LMH6622MM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- Differential
- Slew Rate:
- 85V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 160 MHz
- Current - Input Bias:
- 4.7 µA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 4.3mA (x2 Channels)
- Current - Output / Channel:
- 90 mA
- Voltage - Supply Span (Min):
- 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
LMH6622MM FAQ
1.How can I place an order for LMH6622MM through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6622MM 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 LMH6622MM reliable?
The price and inventory of LMH6622MM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6622MM is usually 5 days.
3.What payment methods are accepted for LMH6622MM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6622MM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6622MM?
LMH6622MM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6622MM 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 LMH6622MM?
For technical support, including LMH6622MM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6622MM requirements.
6.How does Aetrix verify that LMH6622MM is sourced from the original manufacturer or authorized distributors?
All LMH6622MM 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 LMH6622MM meets industry standards.
7.What is the process for return or replacement of LMH6622MM?
All LMH6622MM units undergo pre-shipment inspection (PSI). If there is an issue with LMH6622MM, 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 LMH6622MM part is unused and in its original packaging.
Return procedure for LMH6622MM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMH6622MM Tags
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